add rpi model 3b+ to tested list

If a fatal error occurs before CRT_init has been called, CRT_done
dereferences NULL in CRT_colors.

Simply check if CRT_crashSettings is not NULL, which is eventually
set when CRT_init has been called.

If it is not set, then do not try to disable ncurses.

Proof of Concept (on Linux):

$ ./configure --with-proc=/var/empty
$ make
$ ./htop

.github/FUNDING.yml

@@ -0,0 +1 @@
+open_collective: htop

.github/workflows/build_release.yml

@@ -0,0 +1,51 @@
+name: Build Source Release
+
+# Trigger whenever a release is created
+on:
+  release:
+    types:
+      - created
+
+jobs:
+  build:
+    name: build
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+      with:
+        submodules: true
+
+    - name: archive
+      id: archive
+      run: |
+        VERSION=${{ github.event.release.tag_name }}
+        PKGNAME="htop-$VERSION"
+        SHASUM=$PKGNAME.tar.xz.sha256
+        autoreconf -i
+        mkdir -p /tmp/$PKGNAME
+        mv * /tmp/$PKGNAME
+        mv /tmp/$PKGNAME .
+        TARBALL=$PKGNAME.tar.xz
+        tar cJf $TARBALL $PKGNAME
+        sha256sum $TARBALL > $SHASUM
+        echo "::set-output name=tarball::$TARBALL"
+        echo "::set-output name=shasum::$SHASUM"
+    - name: upload tarball
+      uses: actions/upload-release-asset@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        upload_url: ${{ github.event.release.upload_url }}
+        asset_path: ./${{ steps.archive.outputs.tarball }}
+        asset_name: ${{ steps.archive.outputs.tarball }}
+        asset_content_type: application/gzip
+
+    - name: upload shasum
+      uses: actions/upload-release-asset@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        upload_url: ${{ github.event.release.upload_url }}
+        asset_path: ./${{ steps.archive.outputs.shasum }}
+        asset_name: ${{ steps.archive.outputs.shasum }}
+        asset_content_type: text/plain

.github/workflows/ci.yml

@@ -2,17 +2,22 @@ name: CI
 
 on: [ push, pull_request ]
 
+env:
+  # Enable format attributes in ncurses headers
+  # Enable fortified memory/string handling
+  CPPFLAGS: -DGCC_PRINTF -DGCC_SCANF -D_FORTIFY_SOURCE=2
+
 jobs:
   build-ubuntu-latest-minimal-gcc:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
     - name: Install Dependencies
-      run: sudo apt-get install libncursesw5-dev
+      run: sudo apt-get install --no-install-recommends libncursesw5-dev
     - name: Bootstrap
       run: ./autogen.sh
     - name: Configure
-      run: ./configure --enable-werror --enable-linux-affinity --disable-unicode --without-sensors
+      run: ./configure --enable-werror --enable-affinity --disable-unicode --disable-sensors
     - name: Enable compatibility modes
       run: |
         sed -i 's/#define HAVE_FSTATAT 1/#undef HAVE_FSTATAT/g' config.h
@@ -21,86 +26,127 @@ jobs:
     - name: Build
       run: make -k
     - name: Distcheck
-      run: make distcheck DISTCHECK_CONFIGURE_FLAGS="--enable-werror --enable-linux-affinity --disable-unicode --without-sensors"
+      run: make distcheck DISTCHECK_CONFIGURE_FLAGS="--enable-werror --enable-affinity --disable-unicode --disable-sensors"
 
   build-ubuntu-latest-minimal-clang:
     runs-on: ubuntu-latest
     env:
-      CC: clang-11
+      CC: clang-12
     steps:
     - uses: actions/checkout@v2
     - name: install clang repo
       run: |
         wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key 2>/dev/null | sudo apt-key add -
-        sudo add-apt-repository 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-11 main' -y
+        sudo add-apt-repository 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-12 main' -y
         sudo apt-get update -q
     - name: Install Dependencies
-      run: sudo apt-get install clang-11 libncursesw5-dev
+      run: sudo apt-get install --no-install-recommends clang-12 libncursesw5-dev
     - name: Bootstrap
       run: ./autogen.sh
     - name: Configure
-      run: ./configure --enable-werror --enable-linux-affinity --disable-unicode --without-sensors
+      run: ./configure --enable-werror --enable-affinity --disable-unicode --disable-sensors
     - name: Build
       run: make -k
     - name: Distcheck
-      run: make distcheck DISTCHECK_CONFIGURE_FLAGS="--enable-werror --enable-linux-affinity --disable-unicode --without-sensors"
+      run: make distcheck DISTCHECK_CONFIGURE_FLAGS="--enable-werror --enable-affinity --disable-unicode --disable-sensors"
 
   build-ubuntu-latest-full-featured-gcc:
     runs-on: ubuntu-latest
+    # Enable LTO, might trigger additional warnings on advanced inlining
+    env:
+      CFLAGS: -O3 -g -flto
+      LDFLAGS: -O3 -g -flto -Wl,--as-needed
     steps:
     - uses: actions/checkout@v2
     - name: Install Dependencies
-      run: sudo apt-get install libncursesw5-dev libhwloc-dev libnl-3-dev libnl-genl-3-dev libsensors4-dev
+      run: sudo apt-get install --no-install-recommends libncursesw5-dev libhwloc-dev libnl-3-dev libnl-genl-3-dev libsensors4-dev libcap-dev
     - name: Bootstrap
       run: ./autogen.sh
     - name: Configure
-      run: ./configure --enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --enable-hwloc --enable-setuid --enable-delayacct --with-sensors
+      run: ./configure --enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --enable-hwloc --enable-delayacct --enable-sensors --enable-capabilities
     - name: Build
       run: make -k
     - name: Distcheck
-      run: make distcheck DISTCHECK_CONFIGURE_FLAGS='--enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --enable-hwloc --enable-setuid --enable-delayacct --with-sensors'
+      run: make distcheck DISTCHECK_CONFIGURE_FLAGS='--enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --enable-hwloc --enable-delayacct --enable-sensors --enable-capabilities'
 
   build-ubuntu-latest-full-featured-clang:
     runs-on: ubuntu-latest
     env:
-      CC: clang-11
+      CC: clang-12
     steps:
     - uses: actions/checkout@v2
     - name: install clang repo
       run: |
         wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key 2>/dev/null | sudo apt-key add -
-        sudo add-apt-repository 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-11 main' -y
+        sudo add-apt-repository 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-12 main' -y
         sudo apt-get update -q
     - name: Install Dependencies
-      run: sudo apt-get install clang-11 libncursesw5-dev libhwloc-dev libnl-3-dev libnl-genl-3-dev libsensors4-dev
+      run: sudo apt-get install --no-install-recommends clang-12 libncursesw5-dev libhwloc-dev libnl-3-dev libnl-genl-3-dev libsensors4-dev libcap-dev
     - name: Bootstrap
       run: ./autogen.sh
     - name: Configure
-      run: ./configure --enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --enable-hwloc --enable-setuid --enable-delayacct --with-sensors
+      run: ./configure --enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --enable-hwloc --enable-delayacct --enable-sensors --enable-capabilities
     - name: Build
       run: make -k
     - name: Distcheck
-      run: make distcheck DISTCHECK_CONFIGURE_FLAGS='--enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --enable-hwloc --enable-setuid --enable-delayacct --with-sensors'
+      run: make distcheck DISTCHECK_CONFIGURE_FLAGS='--enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --enable-hwloc --enable-delayacct --enable-sensors --enable-capabilities'
+
+  build-ubuntu-latest-gcc-static:
+    runs-on: ubuntu-latest
+    # Enable LTO, might trigger additional warnings on advanced inlining
+    env:
+      CFLAGS: -O3 -g -flto
+      LDFLAGS: -O3 -g -flto
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install Dependencies
+      run: sudo apt-get install --no-install-recommends libncursesw5-dev libtinfo-dev libgpm-dev libsensors4-dev libcap-dev
+    - name: Bootstrap
+      run: ./autogen.sh
+    - name: Configure
+      run: ./configure --enable-static --enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --disable-hwloc --disable-delayacct --enable-sensors --enable-capabilities
+    - name: Build
+      run: make -k
+    - name: Distcheck
+      run: make distcheck DISTCHECK_CONFIGURE_FLAGS='--enable-static --enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --disable-hwloc --disable-delayacct --enable-sensors --enable-capabilities'
+
+  build-ubuntu-latest-pcp:
+    # Turns out 'ubuntu-latest' can be older than 20.04, we want PCP v5+
+    runs-on: ubuntu-20.04
+    env:
+      # Until Ubuntu catches up with pcp-5.2.3+:
+      #   pcp/Platform.c:309:45: warning: passing argument 2 of ‘pmLookupName’ from incompatible pointer type [-Wincompatible-pointer-types]
+      CFLAGS: -Wno-error=incompatible-pointer-types
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install Dependencies
+      run: sudo apt-get install --no-install-recommends libpcp3-dev libncursesw5-dev libtinfo-dev libgpm-dev
+    - name: Bootstrap
+      run: ./autogen.sh
+    - name: Configure
+      run: ./configure --enable-werror --enable-pcp --enable-unicode
+    - name: Build
+      run: make -k
 
   build-ubuntu-latest-clang-analyzer:
     runs-on: ubuntu-latest
     env:
-      CC: clang-11
+      CC: clang-12
     steps:
     - uses: actions/checkout@v2
     - name: install clang repo
       run: |
         wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key 2>/dev/null | sudo apt-key add -
-        sudo add-apt-repository 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-11 main' -y
+        sudo add-apt-repository 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-12 main' -y
         sudo apt-get update -q
     - name: Install Dependencies
-      run: sudo apt-get install clang-11 clang-tools-11 libncursesw5-dev libhwloc-dev libnl-3-dev libnl-genl-3-dev libsensors4-dev
+      run: sudo apt-get install --no-install-recommends clang-12 clang-tools-12 libncursesw5-dev libnl-3-dev libnl-genl-3-dev libsensors4-dev libcap-dev
     - name: Bootstrap
       run: ./autogen.sh
     - name: Configure
-      run: scan-build-11 -analyze-headers --status-bugs ./configure --enable-debug --enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --enable-hwloc --enable-setuid --enable-delayacct --with-sensors
+      run: scan-build-12 -analyze-headers --status-bugs ./configure --enable-debug --enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --enable-delayacct --enable-sensors --enable-capabilities
     - name: Build
-      run: scan-build-11 -analyze-headers --status-bugs make -j"$(nproc)"
+      run: scan-build-12 -analyze-headers --status-bugs make -j"$(nproc)"
 
   build-macos-latest-clang:
     runs-on: macOS-latest

.gitignore

@@ -1,5 +1,6 @@
-# the binary:
+# the binaries:
 htop
+pcp-htop
 
 # all object files
 *.o
@@ -36,6 +37,7 @@ config.sub
 configure
 depcomp
 htop.1
+pcp-htop.5
 install-sh
 libtool
 ltmain.sh
@@ -45,3 +47,7 @@ stamp-h1
 
 # files related to valgrind/callgrind
 callgrind.out.*
+
+# IDE workspace configurations
+/.idea/
+/.vscode/

.travis.yml

@@ -9,7 +9,8 @@ os:
 
 script:
   - ./autogen.sh
-  # clang might warn about C11 generic selections in isnan()
-  - CFLAGS=-Wno-c11-extensions ./configure --enable-werror
+  - ./configure --enable-werror
   - make -k
-  - CFLAGS=-Wno-c11-extensions make distcheck DISTCHECK_CONFIGURE_FLAGS=--enable-werror
+  - make distcheck DISTCHECK_CONFIGURE_FLAGS=--enable-werror
+  - sudo make install
+  - make installcheck

Action.c

@@ -1,7 +1,7 @@
 /*
 htop - Action.c
 (C) 2015 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -13,9 +13,10 @@ in the source distribution for its full text.
 #include <stdbool.h>
 #include <stdlib.h>
 
+#include "CRT.h"
 #include "CategoriesPanel.h"
 #include "CommandScreen.h"
-#include "CRT.h"
+#include "DynamicColumn.h"
 #include "EnvScreen.h"
 #include "FunctionBar.h"
 #include "Hashtable.h"
@@ -34,40 +35,39 @@ in the source distribution for its full text.
 #include "Vector.h"
 #include "XUtils.h"
 
-#if (defined(HAVE_LIBHWLOC) || defined(HAVE_LINUX_AFFINITY))
+#if (defined(HAVE_LIBHWLOC) || defined(HAVE_AFFINITY))
 #include "Affinity.h"
 #include "AffinityPanel.h"
 #endif
 
 
 Object* Action_pickFromVector(State* st, Panel* list, int x, bool followProcess) {
-   Panel* panel = st->panel;
+   MainPanel* mainPanel = st->mainPanel;
    Header* header = st->header;
-   Settings* settings = st->settings;
 
-   int y = panel->y;
-   ScreenManager* scr = ScreenManager_new(header, settings, st, false);
+   int y = ((Panel*)mainPanel)->y;
+   ScreenManager* scr = ScreenManager_new(header, st->settings, st, false);
    scr->allowFocusChange = false;
-   ScreenManager_add(scr, list, x - 1);
-   ScreenManager_add(scr, panel, -1);
+   ScreenManager_add(scr, list, x);
+   ScreenManager_add(scr, (Panel*)mainPanel, -1);
    Panel* panelFocus;
    int ch;
    bool unfollow = false;
-   int pid = followProcess ? MainPanel_selectedPid((MainPanel*)panel) : -1;
+   int pid = followProcess ? MainPanel_selectedPid(mainPanel) : -1;
    if (followProcess && header->pl->following == -1) {
       header->pl->following = pid;
       unfollow = true;
    }
-   ScreenManager_run(scr, &panelFocus, &ch);
+   ScreenManager_run(scr, &panelFocus, &ch, NULL);
    if (unfollow) {
       header->pl->following = -1;
    }
    ScreenManager_delete(scr);
-   Panel_move(panel, 0, y);
-   Panel_resize(panel, COLS, LINES - y - 1);
+   Panel_move((Panel*)mainPanel, 0, y);
+   Panel_resize((Panel*)mainPanel, COLS, LINES - y - 1);
    if (panelFocus == list && ch == 13) {
       if (followProcess) {
-         Process* selected = (Process*)Panel_getSelected(panel);
+         const Process* selected = (const Process*)Panel_getSelected((Panel*)mainPanel);
          if (selected && selected->pid == pid)
             return Panel_getSelected(list);
 
@@ -84,14 +84,11 @@ Object* Action_pickFromVector(State* st, Panel* list, int x, bool followProcess)
 
 static void Action_runSetup(State* st) {
    ScreenManager* scr = ScreenManager_new(st->header, st->settings, st, true);
-   CategoriesPanel* panelCategories = CategoriesPanel_new(scr, st->settings, st->header, st->pl);
-   ScreenManager_add(scr, (Panel*) panelCategories, 16);
-   CategoriesPanel_makeMetersPage(panelCategories);
-   Panel* panelFocus;
-   int ch;
-   ScreenManager_run(scr, &panelFocus, &ch);
+   CategoriesPanel_new(scr, st->settings, st->header, st->pl);
+   ScreenManager_run(scr, NULL, NULL, "Setup");
    ScreenManager_delete(scr);
    if (st->settings->changed) {
+      CRT_setMouse(st->settings->enableMouse);
       Header_writeBackToSettings(st->header);
    }
 }
@@ -104,7 +101,7 @@ static bool changePriority(MainPanel* panel, int delta) {
    return anyTagged;
 }
 
-static void addUserToVector(hkey_t key, void* userCast, void* panelCast) {
+static void addUserToVector(ht_key_t key, void* userCast, void* panelCast) {
    const char* user = userCast;
    Panel* panel = panelCast;
    Panel_add(panel, (Object*) ListItem_new(user, key));
@@ -141,7 +138,7 @@ static bool expandCollapse(Panel* panel) {
 }
 
 static bool collapseIntoParent(Panel* panel) {
-   Process* p = (Process*) Panel_getSelected(panel);
+   const Process* p = (Process*) Panel_getSelected(panel);
    if (!p)
       return false;
 
@@ -158,41 +155,48 @@ static bool collapseIntoParent(Panel* panel) {
 }
 
 Htop_Reaction Action_setSortKey(Settings* settings, ProcessField sortKey) {
-   Settings_setSortKey(settings, sortKey);
+   ScreenSettings_setSortKey(settings->ss, sortKey);
    return HTOP_REFRESH | HTOP_SAVE_SETTINGS | HTOP_UPDATE_PANELHDR | HTOP_KEEP_FOLLOWING;
 }
 
-static Htop_Reaction sortBy(State* st) {
+// ----------------------------------------
+
+static Htop_Reaction actionSetSortColumn(State* st) {
    Htop_Reaction reaction = HTOP_OK;
-   Panel* sortPanel = Panel_new(0, 0, 0, 0, true, Class(ListItem), FunctionBar_newEnterEsc("Sort   ", "Cancel "));
+   Panel* sortPanel = Panel_new(0, 0, 0, 0, Class(ListItem), true, FunctionBar_newEnterEsc("Sort   ", "Cancel "));
    Panel_setHeader(sortPanel, "Sort by");
-   ProcessField* fields = st->settings->fields;
+   const Settings* settings = st->settings;
+   const ProcessField* fields = settings->ss->fields;
+   Hashtable* dynamicColumns = settings->dynamicColumns;
    for (int i = 0; fields[i]; i++) {
-      char* name = String_trim(Process_fields[fields[i]].name);
+      char* name = NULL;
+      if (fields[i] >= LAST_PROCESSFIELD) {
+         DynamicColumn* column = Hashtable_get(dynamicColumns, fields[i]);
+         if (!column)
+            continue;
+         name = xStrdup(column->caption ? column->caption : column->name);
+      } else {
+         name = String_trim(Process_fields[fields[i]].name);
+      }
       Panel_add(sortPanel, (Object*) ListItem_new(name, fields[i]));
-      if (fields[i] == Settings_getActiveSortKey(st->settings))
+      if (fields[i] == ScreenSettings_getActiveSortKey(settings->ss))
          Panel_setSelected(sortPanel, i);
 
       free(name);
    }
-   ListItem* field = (ListItem*) Action_pickFromVector(st, sortPanel, 15, false);
+   const ListItem* field = (const ListItem*) Action_pickFromVector(st, sortPanel, 14, false);
    if (field) {
       reaction |= Action_setSortKey(st->settings, field->key);
    }
    Object_delete(sortPanel);
 
-   if (st->pauseProcessUpdate)
-      ProcessList_sort(st->pl);
+   st->pl->needsSort = true;
 
    return reaction | HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
 }
 
-// ----------------------------------------
-
-static Htop_Reaction actionResize(State* st) {
-   clear();
-   Panel_resize(st->panel, COLS, LINES - (st->panel->y) - 1);
-   return HTOP_REDRAW_BAR;
+static Htop_Reaction actionSortByPID(State* st) {
+   return Action_setSortKey(st->settings, PID);
 }
 
 static Htop_Reaction actionSortByMemory(State* st) {
@@ -209,12 +213,12 @@ static Htop_Reaction actionSortByTime(State* st) {
 
 static Htop_Reaction actionToggleKernelThreads(State* st) {
    st->settings->hideKernelThreads = !st->settings->hideKernelThreads;
-   return HTOP_RECALCULATE | HTOP_SAVE_SETTINGS;
+   return HTOP_RECALCULATE | HTOP_SAVE_SETTINGS | HTOP_KEEP_FOLLOWING;
 }
 
 static Htop_Reaction actionToggleUserlandThreads(State* st) {
    st->settings->hideUserlandThreads = !st->settings->hideUserlandThreads;
-   return HTOP_RECALCULATE | HTOP_SAVE_SETTINGS;
+   return HTOP_RECALCULATE | HTOP_SAVE_SETTINGS | HTOP_KEEP_FOLLOWING;
 }
 
 static Htop_Reaction actionToggleProgramPath(State* st) {
@@ -228,74 +232,116 @@ static Htop_Reaction actionToggleMergedCommand(State* st) {
 }
 
 static Htop_Reaction actionToggleTreeView(State* st) {
-   st->settings->treeView = !st->settings->treeView;
-   if (st->settings->treeView) {
-      st->settings->treeDirection = 1;
-   }
+   ScreenSettings* ss = st->settings->ss;
+   ss->treeView = !ss->treeView;
 
+   if (!ss->allBranchesCollapsed)
       ProcessList_expandTree(st->pl);
    return HTOP_REFRESH | HTOP_SAVE_SETTINGS | HTOP_KEEP_FOLLOWING | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
 }
 
+static Htop_Reaction actionExpandOrCollapseAllBranches(State* st) {
+   ScreenSettings* ss = st->settings->ss;
+   if (!ss->treeView) {
+      return HTOP_OK;
+   }
+   ss->allBranchesCollapsed = !ss->allBranchesCollapsed;
+   if (ss->allBranchesCollapsed)
+      ProcessList_collapseAllBranches(st->pl);
+   else
+      ProcessList_expandTree(st->pl);
+   return HTOP_REFRESH | HTOP_SAVE_SETTINGS;
+}
+
 static Htop_Reaction actionIncFilter(State* st) {
-   IncSet* inc = ((MainPanel*)st->panel)->inc;
-   IncSet_activate(inc, INC_FILTER, st->panel);
+   IncSet* inc = (st->mainPanel)->inc;
+   IncSet_activate(inc, INC_FILTER, (Panel*)st->mainPanel);
    st->pl->incFilter = IncSet_filter(inc);
    return HTOP_REFRESH | HTOP_KEEP_FOLLOWING;
 }
 
 static Htop_Reaction actionIncSearch(State* st) {
-   IncSet_reset(((MainPanel*)st->panel)->inc, INC_SEARCH);
-   IncSet_activate(((MainPanel*)st->panel)->inc, INC_SEARCH, st->panel);
-   return HTOP_REFRESH | HTOP_KEEP_FOLLOWING;
-}
-
-static Htop_Reaction actionIncNext(State* st) {
-   IncSet_next(((MainPanel*)st->panel)->inc, INC_SEARCH, st->panel, (IncMode_GetPanelValue) MainPanel_getValue);
-   return HTOP_REFRESH | HTOP_KEEP_FOLLOWING;
-}
-
-static Htop_Reaction actionIncPrev(State* st) {
-   IncSet_prev(((MainPanel*)st->panel)->inc, INC_SEARCH, st->panel, (IncMode_GetPanelValue) MainPanel_getValue);
+   IncSet_reset(st->mainPanel->inc, INC_SEARCH);
+   IncSet_activate(st->mainPanel->inc, INC_SEARCH, (Panel*)st->mainPanel);
    return HTOP_REFRESH | HTOP_KEEP_FOLLOWING;
 }
 
 static Htop_Reaction actionHigherPriority(State* st) {
-   bool changed = changePriority((MainPanel*)st->panel, -1);
+   if (Settings_isReadonly())
+      return HTOP_OK;
+
+   bool changed = changePriority(st->mainPanel, -1);
    return changed ? HTOP_REFRESH : HTOP_OK;
 }
 
 static Htop_Reaction actionLowerPriority(State* st) {
-   bool changed = changePriority((MainPanel*)st->panel, 1);
+   if (Settings_isReadonly())
+      return HTOP_OK;
+
+   bool changed = changePriority(st->mainPanel, 1);
    return changed ? HTOP_REFRESH : HTOP_OK;
 }
 
 static Htop_Reaction actionInvertSortOrder(State* st) {
-   Settings_invertSortOrder(st->settings);
-   if (st->pauseProcessUpdate)
-      ProcessList_sort(st->pl);
-   return HTOP_REFRESH | HTOP_SAVE_SETTINGS;
-}
-
-static Htop_Reaction actionSetSortColumn(State* st) {
-   return sortBy(st);
+   ScreenSettings_invertSortOrder(st->settings->ss);
+   st->pl->needsSort = true;
+   return HTOP_REFRESH | HTOP_SAVE_SETTINGS | HTOP_KEEP_FOLLOWING;
 }
 
 static Htop_Reaction actionExpandOrCollapse(State* st) {
-   bool changed = expandCollapse(st->panel);
+   bool changed = expandCollapse((Panel*)st->mainPanel);
    return changed ? HTOP_RECALCULATE : HTOP_OK;
 }
 
 static Htop_Reaction actionCollapseIntoParent(State* st) {
-   if (!st->settings->treeView) {
+   if (!st->settings->ss->treeView) {
       return HTOP_OK;
    }
-   bool changed = collapseIntoParent(st->panel);
+   bool changed = collapseIntoParent((Panel*)st->mainPanel);
    return changed ? HTOP_RECALCULATE : HTOP_OK;
 }
 
 static Htop_Reaction actionExpandCollapseOrSortColumn(State* st) {
-   return st->settings->treeView ? actionExpandOrCollapse(st) : actionSetSortColumn(st);
+   return st->settings->ss->treeView ? actionExpandOrCollapse(st) : actionSetSortColumn(st);
+}
+
+static Htop_Reaction actionNextScreen(State* st) {
+   Settings* settings = st->settings;
+   settings->ssIndex++;
+   if (settings->ssIndex == settings->nScreens) {
+      settings->ssIndex = 0;
+   }
+   settings->ss = settings->screens[settings->ssIndex];
+   return HTOP_REFRESH;
+}
+
+static Htop_Reaction actionPrevScreen(State* st) {
+   Settings* settings = st->settings;
+   if (settings->ssIndex == 0) {
+      settings->ssIndex = settings->nScreens - 1;
+   } else {
+      settings->ssIndex--;
+   }
+   settings->ss = settings->screens[settings->ssIndex];
+   return HTOP_REFRESH;
+}
+
+Htop_Reaction Action_setScreenTab(Settings* settings, int x) {
+   int s = 2;
+   for (unsigned int i = 0; i < settings->nScreens; i++) {
+      if (x < s) {
+         return 0;
+      }
+      const char* name = settings->screens[i]->name;
+      int len = strlen(name);
+      if (x <= s + len + 1) {
+         settings->ssIndex = i;
+         settings->ss = settings->screens[i];
+         return HTOP_REFRESH;
+      }
+      s += len + 3;
+   }
+   return 0;
 }
 
 static Htop_Reaction actionQuit(ATTR_UNUSED State* st) {
@@ -303,13 +349,14 @@ static Htop_Reaction actionQuit(ATTR_UNUSED State* st) {
 }
 
 static Htop_Reaction actionSetAffinity(State* st) {
-   if (st->pl->cpuCount == 1)
+   if (Settings_isReadonly())
       return HTOP_OK;
 
-#if (defined(HAVE_LIBHWLOC) || defined(HAVE_LINUX_AFFINITY))
-   Panel* panel = st->panel;
+   if (st->pl->activeCPUs == 1)
+      return HTOP_OK;
 
-   Process* p = (Process*) Panel_getSelected(panel);
+#if (defined(HAVE_LIBHWLOC) || defined(HAVE_AFFINITY))
+   const Process* p = (const Process*) Panel_getSelected((Panel*)st->mainPanel);
    if (!p)
       return HTOP_OK;
 
@@ -319,46 +366,52 @@ static Htop_Reaction actionSetAffinity(State* st) {
 
    int width;
    Panel* affinityPanel = AffinityPanel_new(st->pl, affinity1, &width);
-   width += 1; /* we add a gap between the panels */
    Affinity_delete(affinity1);
 
-   void* set = Action_pickFromVector(st, affinityPanel, width, true);
+   const void* set = Action_pickFromVector(st, affinityPanel, width, true);
    if (set) {
       Affinity* affinity2 = AffinityPanel_getAffinity(affinityPanel, st->pl);
-      bool ok = MainPanel_foreachProcess((MainPanel*)panel, Affinity_set, (Arg) { .v = affinity2 }, NULL);
+      bool ok = MainPanel_foreachProcess(st->mainPanel, Affinity_set, (Arg) { .v = affinity2 }, NULL);
       if (!ok)
          beep();
       Affinity_delete(affinity2);
    }
    Object_delete(affinityPanel);
-#endif
    return HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
+#else
+   return HTOP_OK;
+#endif
+
 }
 
 static Htop_Reaction actionKill(State* st) {
-   Panel* signalsPanel = SignalsPanel_new();
-   ListItem* sgn = (ListItem*) Action_pickFromVector(st, signalsPanel, 15, true);
-   if (sgn) {
-      if (sgn->key != 0) {
-         Panel_setHeader(st->panel, "Sending...");
-         Panel_draw(st->panel, false, true, true);
+   if (Settings_isReadonly())
+      return HTOP_OK;
+
+   static int preSelectedSignal = SIGNALSPANEL_INITSELECTEDSIGNAL;
+
+   Panel* signalsPanel = SignalsPanel_new(preSelectedSignal);
+   const ListItem* sgn = (ListItem*) Action_pickFromVector(st, signalsPanel, 14, true);
+   if (sgn && sgn->key != 0) {
+      preSelectedSignal = sgn->key;
+      Panel_setHeader((Panel*)st->mainPanel, "Sending...");
+      Panel_draw((Panel*)st->mainPanel, false, true, true, State_hideFunctionBar(st));
       refresh();
-         MainPanel_foreachProcess((MainPanel*)st->panel, Process_sendSignal, (Arg) { .i = sgn->key }, NULL);
+      MainPanel_foreachProcess(st->mainPanel, Process_sendSignal, (Arg) { .i = sgn->key }, NULL);
       napms(500);
    }
-   }
    Panel_delete((Object*)signalsPanel);
    return HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
 }
 
 static Htop_Reaction actionFilterByUser(State* st) {
-   Panel* usersPanel = Panel_new(0, 0, 0, 0, true, Class(ListItem), FunctionBar_newEnterEsc("Show   ", "Cancel "));
+   Panel* usersPanel = Panel_new(0, 0, 0, 0, Class(ListItem), true, FunctionBar_newEnterEsc("Show   ", "Cancel "));
    Panel_setHeader(usersPanel, "Show processes of:");
    UsersTable_foreach(st->ut, addUserToVector, usersPanel);
    Vector_insertionSort(usersPanel->items);
    ListItem* allUsers = ListItem_new("All users", -1);
    Panel_insert(usersPanel, 0, (Object*) allUsers);
-   ListItem* picked = (ListItem*) Action_pickFromVector(st, usersPanel, 20, false);
+   const ListItem* picked = (ListItem*) Action_pickFromVector(st, usersPanel, 19, false);
    if (picked) {
       if (picked == allUsers) {
          st->pl->userId = (uid_t)-1;
@@ -371,22 +424,21 @@ static Htop_Reaction actionFilterByUser(State* st) {
 }
 
 Htop_Reaction Action_follow(State* st) {
-   st->pl->following = MainPanel_selectedPid((MainPanel*)st->panel);
-   Panel_setSelectionColor(st->panel, PANEL_SELECTION_FOLLOW);
+   st->pl->following = MainPanel_selectedPid(st->mainPanel);
+   Panel_setSelectionColor((Panel*)st->mainPanel, PANEL_SELECTION_FOLLOW);
    return HTOP_KEEP_FOLLOWING;
 }
 
 static Htop_Reaction actionSetup(State* st) {
    Action_runSetup(st);
-   // TODO: shouldn't need this, colors should be dynamic
-   int headerHeight = Header_calculateHeight(st->header);
-   Panel_move(st->panel, 0, headerHeight);
-   Panel_resize(st->panel, COLS, LINES-headerHeight-1);
-   return HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
+   return HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR | HTOP_RESIZE;
 }
 
 static Htop_Reaction actionLsof(State* st) {
-   Process* p = (Process*) Panel_getSelected(st->panel);
+   if (Settings_isReadonly())
+      return HTOP_OK;
+
+   const Process* p = (Process*) Panel_getSelected((Panel*)st->mainPanel);
    if (!p)
       return HTOP_OK;
 
@@ -399,8 +451,9 @@ static Htop_Reaction actionLsof(State* st) {
 }
 
 static Htop_Reaction actionShowLocks(State* st) {
-   Process* p = (Process*) Panel_getSelected(st->panel);
-   if (!p) return HTOP_OK;
+   const Process* p = (Process*) Panel_getSelected((Panel*)st->mainPanel);
+   if (!p)
+      return HTOP_OK;
    ProcessLocksScreen* pls = ProcessLocksScreen_new(p);
    InfoScreen_run((InfoScreen*)pls);
    ProcessLocksScreen_delete((Object*)pls);
@@ -410,7 +463,10 @@ static Htop_Reaction actionShowLocks(State* st) {
 }
 
 static Htop_Reaction actionStrace(State* st) {
-   Process* p = (Process*) Panel_getSelected(st->panel);
+   if (Settings_isReadonly())
+      return HTOP_OK;
+
+   const Process* p = (Process*) Panel_getSelected((Panel*)st->mainPanel);
    if (!p)
       return HTOP_OK;
 
@@ -426,12 +482,12 @@ static Htop_Reaction actionStrace(State* st) {
 }
 
 static Htop_Reaction actionTag(State* st) {
-   Process* p = (Process*) Panel_getSelected(st->panel);
+   Process* p = (Process*) Panel_getSelected((Panel*)st->mainPanel);
    if (!p)
       return HTOP_OK;
 
    Process_toggleTag(p);
-   Panel_onKey(st->panel, KEY_DOWN);
+   Panel_onKey((Panel*)st->mainPanel, KEY_DOWN);
    return HTOP_OK;
 }
 
@@ -447,49 +503,53 @@ static Htop_Reaction actionTogglePauseProcessUpdate(State* st) {
 
 static const struct {
    const char* key;
+   bool roInactive;
    const char* info;
 } helpLeft[] = {
-   { .key = " Arrows: ", .info = "scroll process list" },
-   { .key = " Digits: ", .info = "incremental PID search" },
-   { .key = "   F3 /: ", .info = "incremental name search" },
-   { .key = "   F4 \\: ",.info = "incremental name filtering" },
-   { .key = "   F5 t: ", .info = "tree view" },
-   { .key = "      p: ", .info = "toggle program path" },
-   { .key = "      m: ", .info = "toggle merged command" },
-   { .key = "      Z: ", .info = "pause/resume process updates" },
-   { .key = "      u: ", .info = "show processes of a single user" },
-   { .key = "      H: ", .info = "hide/show user process threads" },
-   { .key = "      K: ", .info = "hide/show kernel threads" },
-   { .key = "      F: ", .info = "cursor follows process" },
-   { .key = "    + -: ", .info = "expand/collapse tree" },
-   { .key = "  P M T: ", .info = "sort by CPU%, MEM% or TIME" },
-   { .key = "      I: ", .info = "invert sort order" },
-   { .key = " F6 > .: ", .info = "select sort column" },
+   { .key = "    Tab: ",  .roInactive = false, .info = "switch to next screen tab" },
+   { .key = " Arrows: ",  .roInactive = false, .info = "scroll process list" },
+   { .key = " Digits: ",  .roInactive = false, .info = "incremental PID search" },
+   { .key = "   F3 /: ",  .roInactive = false, .info = "incremental name search" },
+   { .key = "   F4 \\: ", .roInactive = false, .info = "incremental name filtering" },
+   { .key = "   F5 t: ",  .roInactive = false, .info = "tree view" },
+   { .key = "      p: ",  .roInactive = false, .info = "toggle program path" },
+   { .key = "      m: ",  .roInactive = false, .info = "toggle merged command" },
+   { .key = "      Z: ",  .roInactive = false, .info = "pause/resume process updates" },
+   { .key = "      u: ",  .roInactive = false, .info = "show processes of a single user" },
+   { .key = "      H: ",  .roInactive = false, .info = "hide/show user process threads" },
+   { .key = "      K: ",  .roInactive = false, .info = "hide/show kernel threads" },
+   { .key = "      F: ",  .roInactive = false, .info = "cursor follows process" },
+   { .key = "  + - *: ",  .roInactive = false, .info = "expand/collapse tree/toggle all" },
+   { .key = "N P M T: ",  .roInactive = false, .info = "sort by PID, CPU%, MEM% or TIME" },
+   { .key = "      I: ",  .roInactive = false, .info = "invert sort order" },
+   { .key = " F6 > .: ",  .roInactive = false, .info = "select sort column" },
    { .key = NULL, .info = NULL }
 };
 
 static const struct {
    const char* key;
+   bool roInactive;
    const char* info;
 } helpRight[] = {
-   { .key = "  Space: ", .info = "tag process" },
-   { .key = "      c: ", .info = "tag process and its children" },
-   { .key = "      U: ", .info = "untag all processes" },
-   { .key = "   F9 k: ", .info = "kill process/tagged processes" },
-   { .key = "   F7 ]: ", .info = "higher priority (root only)" },
-   { .key = "   F8 [: ", .info = "lower priority (+ nice)" },
-#if (defined(HAVE_LIBHWLOC) || defined(HAVE_LINUX_AFFINITY))
-   { .key = "      a: ", .info = "set CPU affinity" },
+   { .key = "  S-Tab: ", .roInactive = false, .info = "switch to previous screen tab" },
+   { .key = "  Space: ", .roInactive = false, .info = "tag process" },
+   { .key = "      c: ", .roInactive = false, .info = "tag process and its children" },
+   { .key = "      U: ", .roInactive = false, .info = "untag all processes" },
+   { .key = "   F9 k: ", .roInactive = true,  .info = "kill process/tagged processes" },
+   { .key = "   F7 ]: ", .roInactive = true,  .info = "higher priority (root only)" },
+   { .key = "   F8 [: ", .roInactive = true,  .info = "lower priority (+ nice)" },
+#if (defined(HAVE_LIBHWLOC) || defined(HAVE_AFFINITY))
+   { .key = "      a: ", .roInactive = true, .info = "set CPU affinity" },
 #endif
-   { .key = "      e: ", .info = "show process environment" },
-   { .key = "      i: ", .info = "set IO priority" },
-   { .key = "      l: ", .info = "list open files with lsof" },
-   { .key = "      x: ", .info = "list file locks of process" },
-   { .key = "      s: ", .info = "trace syscalls with strace" },
-   { .key = "      w: ", .info = "wrap process command in multiple lines" },
-   { .key = " F2 C S: ", .info = "setup" },
-   { .key = "   F1 h: ", .info = "show this help screen" },
-   { .key = "  F10 q: ", .info = "quit" },
+   { .key = "      e: ", .roInactive = false, .info = "show process environment" },
+   { .key = "      i: ", .roInactive = true,  .info = "set IO priority" },
+   { .key = "      l: ", .roInactive = true,  .info = "list open files with lsof" },
+   { .key = "      x: ", .roInactive = false, .info = "list file locks of process" },
+   { .key = "      s: ", .roInactive = true,  .info = "trace syscalls with strace" },
+   { .key = "      w: ", .roInactive = false, .info = "wrap process command in multiple lines" },
+   { .key = " F2 C S: ", .roInactive = false, .info = "setup" },
+   { .key = " F1 h ?: ", .roInactive = false, .info = "show this help screen" },
+   { .key = "  F10 q: ", .roInactive = false, .info = "quit" },
    { .key = NULL, .info = NULL }
 };
 
@@ -499,8 +559,6 @@ static inline void addattrstr( int attr, const char* str) {
 }
 
 static Htop_Reaction actionHelp(State* st) {
-   Settings* settings = st->settings;
-
    clear();
    attrset(CRT_colors[HELP_BOLD]);
 
@@ -510,45 +568,63 @@ static Htop_Reaction actionHelp(State* st) {
    int line = 0;
 
    mvaddstr(line++, 0, "htop " VERSION " - " COPYRIGHT);
-   mvaddstr(line++, 0, "Released under the GNU GPLv2. See 'man' page for more info.");
+   mvaddstr(line++, 0, "Released under the GNU GPLv2+. See 'man' page for more info.");
 
    attrset(CRT_colors[DEFAULT_COLOR]);
    line++;
    mvaddstr(line++, 0, "CPU usage bar: ");
 
+#define addbartext(attr, prefix, text)               \
+   do {                                              \
+      addattrstr(CRT_colors[DEFAULT_COLOR], prefix); \
+      addattrstr(attr, text);                        \
+   } while(0)
+
    addattrstr(CRT_colors[BAR_BORDER], "[");
-   if (settings->detailedCPUTime) {
-      addattrstr(CRT_colors[CPU_NICE_TEXT], "low"); addstr("/");
-      addattrstr(CRT_colors[CPU_NORMAL], "normal"); addstr("/");
-      addattrstr(CRT_colors[CPU_SYSTEM], "kernel"); addstr("/");
-      addattrstr(CRT_colors[CPU_IRQ], "irq"); addstr("/");
-      addattrstr(CRT_colors[CPU_SOFTIRQ], "soft-irq"); addstr("/");
-      addattrstr(CRT_colors[CPU_STEAL], "steal"); addstr("/");
-      addattrstr(CRT_colors[CPU_GUEST], "guest"); addstr("/");
-      addattrstr(CRT_colors[CPU_IOWAIT], "io-wait");
-      addattrstr(CRT_colors[BAR_SHADOW], " used%");
+   addbartext(CRT_colors[CPU_NICE_TEXT], "", "low");
+   addbartext(CRT_colors[CPU_NORMAL], "/", "normal");
+   addbartext(CRT_colors[CPU_SYSTEM], "/", "kernel");
+   if (st->settings->detailedCPUTime) {
+      addbartext(CRT_colors[CPU_IRQ], "/", "irq");
+      addbartext(CRT_colors[CPU_SOFTIRQ], "/", "soft-irq");
+      addbartext(CRT_colors[CPU_STEAL], "/", "steal");
+      addbartext(CRT_colors[CPU_GUEST], "/", "guest");
+      addbartext(CRT_colors[CPU_IOWAIT], "/", "io-wait");
+      addbartext(CRT_colors[BAR_SHADOW], " ", "used%");
    } else {
-      addattrstr(CRT_colors[CPU_NICE_TEXT], "low-priority"); addstr("/");
-      addattrstr(CRT_colors[CPU_NORMAL], "normal"); addstr("/");
-      addattrstr(CRT_colors[CPU_SYSTEM], "kernel"); addstr("/");
-      addattrstr(CRT_colors[CPU_GUEST], "virtualiz");
-      addattrstr(CRT_colors[BAR_SHADOW], "               used%");
+      addbartext(CRT_colors[CPU_GUEST], "/", "guest");
+      addbartext(CRT_colors[BAR_SHADOW], "                  ", "used%");
    }
    addattrstr(CRT_colors[BAR_BORDER], "]");
+
    attrset(CRT_colors[DEFAULT_COLOR]);
    mvaddstr(line++, 0, "Memory bar:    ");
    addattrstr(CRT_colors[BAR_BORDER], "[");
-   addattrstr(CRT_colors[MEMORY_USED], "used"); addstr("/");
-   addattrstr(CRT_colors[MEMORY_BUFFERS_TEXT], "buffers"); addstr("/");
-   addattrstr(CRT_colors[MEMORY_CACHE], "cache");
-   addattrstr(CRT_colors[BAR_SHADOW], "                            used/total");
+   addbartext(CRT_colors[MEMORY_USED], "", "used");
+   addbartext(CRT_colors[MEMORY_BUFFERS_TEXT], "/", "buffers");
+   addbartext(CRT_colors[MEMORY_SHARED], "/", "shared");
+   addbartext(CRT_colors[MEMORY_CACHE], "/", "cache");
+   addbartext(CRT_colors[BAR_SHADOW], "                     ", "used");
+   addbartext(CRT_colors[BAR_SHADOW], "/", "total");
    addattrstr(CRT_colors[BAR_BORDER], "]");
+
    attrset(CRT_colors[DEFAULT_COLOR]);
    mvaddstr(line++, 0, "Swap bar:      ");
    addattrstr(CRT_colors[BAR_BORDER], "[");
-   addattrstr(CRT_colors[SWAP], "used");
-   addattrstr(CRT_colors[BAR_SHADOW], "                                          used/total");
+   addbartext(CRT_colors[SWAP], "", "used");
+#ifdef HTOP_LINUX
+   addbartext(CRT_colors[SWAP_CACHE], "/", "cache");
+#else
+   addbartext(CRT_colors[SWAP_CACHE], "      ", "");
+#endif
+   addbartext(CRT_colors[BAR_SHADOW], "                                    ", "used");
+   addbartext(CRT_colors[BAR_SHADOW], "/", "total");
    addattrstr(CRT_colors[BAR_BORDER], "]");
+
+   line++;
+
+#undef addbartext
+
    attrset(CRT_colors[DEFAULT_COLOR]);
    mvaddstr(line++, 0, "Type and layout of header meters are configurable in the setup screen.");
    if (CRT_colorScheme == COLORSCHEME_MONOCHROME) {
@@ -556,31 +632,47 @@ static Htop_Reaction actionHelp(State* st) {
    }
    line++;
 
-   mvaddstr(line++, 0, "Process state: R: running; S: sleeping; T: traced/stopped; Z: zombie; D: disk sleep");
+#define addattrstatestr(attr, state, desc)              \
+   do {                                                 \
+      addattrstr(attr, state);                          \
+      addattrstr(CRT_colors[DEFAULT_COLOR], ": " desc); \
+   } while(0)
 
-   line++;
+   mvaddstr(line, 0, "Process state: ");
+   addattrstatestr(CRT_colors[PROCESS_RUN_STATE], "R", "running; ");
+   addattrstatestr(CRT_colors[PROCESS_SHADOW], "S", "sleeping; ");
+   addattrstatestr(CRT_colors[PROCESS_RUN_STATE], "t", "traced/stopped; ");
+   addattrstatestr(CRT_colors[PROCESS_D_STATE], "Z", "zombie; ");
+   addattrstatestr(CRT_colors[PROCESS_D_STATE], "D", "disk sleep");
+   attrset(CRT_colors[DEFAULT_COLOR]);
+
+#undef addattrstatestr
+
+   line += 2;
+
+   const bool readonly = Settings_isReadonly();
 
    int item;
    for (item = 0; helpLeft[item].key; item++) {
-      attrset(CRT_colors[DEFAULT_COLOR]);
-      mvaddstr(line + item, 9,  helpLeft[item].info);
-      attrset(CRT_colors[HELP_BOLD]);
-      mvaddstr(line + item, 0,  helpLeft[item].key);
+      attrset((helpLeft[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[DEFAULT_COLOR]);
+      mvaddstr(line + item, 10, helpLeft[item].info);
+      attrset((helpLeft[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[HELP_BOLD]);
+      mvaddstr(line + item, 1,  helpLeft[item].key);
       if (String_eq(helpLeft[item].key, "      H: ")) {
-         attrset(CRT_colors[PROCESS_THREAD]);
-         mvaddstr(line + item, 32, "threads");
+         attrset((helpLeft[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[PROCESS_THREAD]);
+         mvaddstr(line + item, 33, "threads");
       } else if (String_eq(helpLeft[item].key, "      K: ")) {
-         attrset(CRT_colors[PROCESS_THREAD]);
-         mvaddstr(line + item, 26, "threads");
+         attrset((helpLeft[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[PROCESS_THREAD]);
+         mvaddstr(line + item, 27, "threads");
       }
    }
    int leftHelpItems = item;
 
    for (item = 0; helpRight[item].key; item++) {
-      attrset(CRT_colors[HELP_BOLD]);
-      mvaddstr(line + item, 40, helpRight[item].key);
-      attrset(CRT_colors[DEFAULT_COLOR]);
-      mvaddstr(line + item, 49, helpRight[item].info);
+      attrset((helpRight[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[HELP_BOLD]);
+      mvaddstr(line + item, 41, helpRight[item].key);
+      attrset((helpRight[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[DEFAULT_COLOR]);
+      mvaddstr(line + item, 50, helpRight[item].info);
    }
    line += MAXIMUM(leftHelpItems, item);
    line++;
@@ -592,28 +684,28 @@ static Htop_Reaction actionHelp(State* st) {
    CRT_readKey();
    clear();
 
-   return HTOP_RECALCULATE | HTOP_REDRAW_BAR;
+   return HTOP_RECALCULATE | HTOP_REDRAW_BAR | HTOP_KEEP_FOLLOWING;
 }
 
 static Htop_Reaction actionUntagAll(State* st) {
-   for (int i = 0; i < Panel_size(st->panel); i++) {
-      Process* p = (Process*) Panel_get(st->panel, i);
+   for (int i = 0; i < Panel_size((Panel*)st->mainPanel); i++) {
+      Process* p = (Process*) Panel_get((Panel*)st->mainPanel, i);
       p->tag = false;
    }
    return HTOP_REFRESH;
 }
 
 static Htop_Reaction actionTagAllChildren(State* st) {
-   Process* p = (Process*) Panel_getSelected(st->panel);
+   Process* p = (Process*) Panel_getSelected((Panel*)st->mainPanel);
    if (!p)
       return HTOP_OK;
 
-   tagAllChildren(st->panel, p);
+   tagAllChildren((Panel*)st->mainPanel, p);
    return HTOP_OK;
 }
 
 static Htop_Reaction actionShowEnvScreen(State* st) {
-   Process* p = (Process*) Panel_getSelected(st->panel);
+   Process* p = (Process*) Panel_getSelected((Panel*)st->mainPanel);
    if (!p)
       return HTOP_OK;
 
@@ -626,7 +718,7 @@ static Htop_Reaction actionShowEnvScreen(State* st) {
 }
 
 static Htop_Reaction actionShowCommandScreen(State* st) {
-   Process* p = (Process*) Panel_getSelected(st->panel);
+   Process* p = (Process*) Panel_getSelected((Panel*)st->mainPanel);
    if (!p)
       return HTOP_OK;
 
@@ -640,6 +732,7 @@ static Htop_Reaction actionShowCommandScreen(State* st) {
 
 void Action_setBindings(Htop_Action* keys) {
    keys[' '] = actionTag;
+   keys['*'] = actionExpandOrCollapseAllBranches;
    keys['+'] = actionExpandOrCollapse;
    keys[','] = actionSetSortColumn;
    keys['-'] = actionExpandOrCollapse;
@@ -655,7 +748,7 @@ void Action_setBindings(Htop_Action* keys) {
    keys['I'] = actionInvertSortOrder;
    keys['K'] = actionToggleKernelThreads;
    keys['M'] = actionSortByMemory;
-   keys['N'] = actionIncPrev;
+   keys['N'] = actionSortByPID;
    keys['P'] = actionSortByCPU;
    keys['S'] = actionSetup;
    keys['T'] = actionSortByTime;
@@ -673,7 +766,6 @@ void Action_setBindings(Htop_Action* keys) {
    keys['k'] = actionKill;
    keys['l'] = actionLsof;
    keys['m'] = actionToggleMergedCommand;
-   keys['n'] = actionIncNext;
    keys['p'] = actionToggleProgramPath;
    keys['q'] = actionQuit;
    keys['s'] = actionStrace;
@@ -693,5 +785,6 @@ void Action_setBindings(Htop_Action* keys) {
    keys[KEY_F(10)] = actionQuit;
    keys[KEY_F(18)] = actionExpandCollapseOrSortColumn;
    keys[KEY_RECLICK] = actionExpandOrCollapse;
-   keys[KEY_RESIZE] = actionResize;
+   keys[KEY_SHIFT_TAB] = actionPrevScreen;
+   keys['\t'] = actionNextScreen;
 }

Action.h

@@ -3,7 +3,7 @@
 /*
 htop - Action.h
 (C) 2015 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -20,27 +20,35 @@ in the source distribution for its full text.
 #include "Settings.h"
 #include "UsersTable.h"
 
+
 typedef enum {
    HTOP_OK              = 0x00,
    HTOP_REFRESH         = 0x01,
-   HTOP_RECALCULATE = 0x03, // implies HTOP_REFRESH
+   HTOP_RECALCULATE     = 0x02 | HTOP_REFRESH,
    HTOP_SAVE_SETTINGS   = 0x04,
    HTOP_KEEP_FOLLOWING  = 0x08,
    HTOP_QUIT            = 0x10,
    HTOP_REDRAW_BAR      = 0x20,
-   HTOP_UPDATE_PANELHDR = 0x41, // implies HTOP_REFRESH
+   HTOP_UPDATE_PANELHDR = 0x40 | HTOP_REFRESH,
+   HTOP_RESIZE          = 0x80 | HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR,
 } Htop_Reaction;
 
+struct MainPanel_; // IWYU pragma: keep
+
 typedef struct State_ {
    Settings* settings;
    UsersTable* ut;
    ProcessList* pl;
-   Panel* panel;
+   struct MainPanel_* mainPanel;
    Header* header;
    bool pauseProcessUpdate;
    bool hideProcessSelection;
 } State;
 
+static inline bool State_hideFunctionBar(const State* st) {
+   return st->settings->hideFunctionBar == 2 || (st->settings->hideFunctionBar == 1 && st->hideProcessSelection);
+}
+
 typedef Htop_Reaction (*Htop_Action)(State* st);
 
 Object* Action_pickFromVector(State* st, Panel* list, int x, bool followProcess);
@@ -49,6 +57,8 @@ bool Action_setUserOnly(const char* userName, uid_t* userId);
 
 Htop_Reaction Action_setSortKey(Settings* settings, ProcessField sortKey);
 
+Htop_Reaction Action_setScreenTab(Settings* settings, int x);
+
 Htop_Reaction Action_follow(State* st);
 
 void Action_setBindings(Htop_Action* keys);

Affinity.c

@@ -2,7 +2,7 @@
 htop - Affinity.c
 (C) 2004-2011 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -14,7 +14,7 @@ in the source distribution for its full text.
 
 #include "XUtils.h"
 
-#ifdef HAVE_LIBHWLOC
+#if defined(HAVE_LIBHWLOC)
 #include <hwloc.h>
 #include <hwloc/bitmap.h>
 #ifdef __linux__
@@ -22,7 +22,7 @@ in the source distribution for its full text.
 #else
 #define HTOP_HWLOC_CPUBIND_FLAG HWLOC_CPUBIND_PROCESS
 #endif
-#elif defined(HAVE_LINUX_AFFINITY)
+#elif defined(HAVE_AFFINITY)
 #include <sched.h>
 #endif
 
@@ -30,7 +30,7 @@ in the source distribution for its full text.
 Affinity* Affinity_new(ProcessList* pl) {
    Affinity* this = xCalloc(1, sizeof(Affinity));
    this->size = 8;
-   this->cpus = xCalloc(this->size, sizeof(int));
+   this->cpus = xCalloc(this->size, sizeof(unsigned int));
    this->pl = pl;
    return this;
 }
@@ -40,32 +40,32 @@ void Affinity_delete(Affinity* this) {
    free(this);
 }
 
-void Affinity_add(Affinity* this, int id) {
+void Affinity_add(Affinity* this, unsigned int id) {
    if (this->used == this->size) {
       this->size *= 2;
-      this->cpus = xRealloc(this->cpus, sizeof(int) * this->size);
+      this->cpus = xRealloc(this->cpus, sizeof(unsigned int) * this->size);
    }
    this->cpus[this->used] = id;
    this->used++;
 }
 
 
-#ifdef HAVE_LIBHWLOC
+#if defined(HAVE_LIBHWLOC)
 
-Affinity* Affinity_get(Process* proc, ProcessList* pl) {
+Affinity* Affinity_get(const Process* proc, ProcessList* pl) {
    hwloc_cpuset_t cpuset = hwloc_bitmap_alloc();
    bool ok = (hwloc_get_proc_cpubind(pl->topology, proc->pid, cpuset, HTOP_HWLOC_CPUBIND_FLAG) == 0);
    Affinity* affinity = NULL;
    if (ok) {
       affinity = Affinity_new(pl);
       if (hwloc_bitmap_last(cpuset) == -1) {
-         for (int i = 0; i < pl->cpuCount; i++) {
+         for (unsigned int i = 0; i < pl->existingCPUs; i++) {
             Affinity_add(affinity, i);
          }
       } else {
-         unsigned int id;
-         hwloc_bitmap_foreach_begin(id, cpuset);
-         Affinity_add(affinity, id);
+         int id;
+         hwloc_bitmap_foreach_begin(id, cpuset)
+            Affinity_add(affinity, (unsigned)id);
          hwloc_bitmap_foreach_end();
       }
    }
@@ -76,7 +76,7 @@ Affinity* Affinity_get(Process* proc, ProcessList* pl) {
 bool Affinity_set(Process* proc, Arg arg) {
    Affinity* this = arg.v;
    hwloc_cpuset_t cpuset = hwloc_bitmap_alloc();
-   for (int i = 0; i < this->used; i++) {
+   for (unsigned int i = 0; i < this->used; i++) {
       hwloc_bitmap_set(cpuset, this->cpus[i]);
    }
    bool ok = (hwloc_set_proc_cpubind(this->pl->topology, proc->pid, cpuset, HTOP_HWLOC_CPUBIND_FLAG) == 0);
@@ -84,16 +84,16 @@ bool Affinity_set(Process* proc, Arg arg) {
    return ok;
 }
 
-#elif defined(HAVE_LINUX_AFFINITY)
+#elif defined(HAVE_AFFINITY)
 
-Affinity* Affinity_get(Process* proc, ProcessList* pl) {
+Affinity* Affinity_get(const Process* proc, ProcessList* pl) {
    cpu_set_t cpuset;
    bool ok = (sched_getaffinity(proc->pid, sizeof(cpu_set_t), &cpuset) == 0);
    if (!ok)
       return NULL;
 
    Affinity* affinity = Affinity_new(pl);
-   for (int i = 0; i < pl->cpuCount; i++) {
+   for (unsigned int i = 0; i < pl->existingCPUs; i++) {
       if (CPU_ISSET(i, &cpuset)) {
          Affinity_add(affinity, i);
       }
@@ -105,7 +105,7 @@ bool Affinity_set(Process* proc, Arg arg) {
    Affinity* this = arg.v;
    cpu_set_t cpuset;
    CPU_ZERO(&cpuset);
-   for (int i = 0; i < this->used; i++) {
+   for (unsigned int i = 0; i < this->used; i++) {
       CPU_SET(this->cpus[i], &cpuset);
    }
    bool ok = (sched_setaffinity(proc->pid, sizeof(unsigned long), &cpuset) == 0);

Affinity.h

@@ -4,7 +4,7 @@
 htop - Affinity.h
 (C) 2004-2011 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -12,7 +12,7 @@ in the source distribution for its full text.
 
 #include "ProcessList.h"
 
-#if defined(HAVE_LIBHWLOC) || defined(HAVE_LINUX_AFFINITY)
+#if defined(HAVE_LIBHWLOC) || defined(HAVE_AFFINITY)
 #include <stdbool.h>
 
 #include "Object.h"
@@ -20,30 +20,30 @@ in the source distribution for its full text.
 #endif
 
 
-#if defined(HAVE_LIBHWLOC) && defined(HAVE_LINUX_AFFINITY)
-#error hwloc and linux affinity are mutual exclusive.
+#if defined(HAVE_LIBHWLOC) && defined(HAVE_AFFINITY)
+#error hwloc and affinity support are mutual exclusive.
 #endif
 
 
 typedef struct Affinity_ {
    ProcessList* pl;
-   int size;
-   int used;
-   int* cpus;
+   unsigned int size;
+   unsigned int used;
+   unsigned int* cpus;
 } Affinity;
 
 Affinity* Affinity_new(ProcessList* pl);
 
 void Affinity_delete(Affinity* this);
 
-void Affinity_add(Affinity* this, int id);
+void Affinity_add(Affinity* this, unsigned int id);
 
-#if defined(HAVE_LIBHWLOC) || defined(HAVE_LINUX_AFFINITY)
+#if defined(HAVE_LIBHWLOC) || defined(HAVE_AFFINITY)
 
-Affinity* Affinity_get(Process* proc, ProcessList* pl);
+Affinity* Affinity_get(const Process* proc, ProcessList* pl);
 
 bool Affinity_set(Process* proc, Arg arg);
 
-#endif /* HAVE_LIBHWLOC || HAVE_LINUX_AFFINITY */
+#endif /* HAVE_LIBHWLOC || HAVE_AFFINITY */
 
 #endif

AffinityPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - AffinityPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -357,7 +357,7 @@ static const char* const AffinityPanelFunctions[] = {
 static const char* const AffinityPanelKeys[] = {"Enter", "Esc", "F1", "F2", "F3"};
 static const int AffinityPanelEvents[] = {13, 27, KEY_F(1), KEY_F(2), KEY_F(3)};
 
-Panel* AffinityPanel_new(ProcessList* pl, Affinity* affinity, int* width) {
+Panel* AffinityPanel_new(ProcessList* pl, const Affinity* affinity, int* width) {
    AffinityPanel* this = AllocThis(AffinityPanel);
    Panel* super = (Panel*) this;
    Panel_init(super, 1, 1, 1, 1, Class(MaskItem), false, FunctionBar_new(AffinityPanelFunctions, AffinityPanelKeys, AffinityPanelEvents));
@@ -382,8 +382,11 @@ Panel* AffinityPanel_new(ProcessList* pl, Affinity* affinity, int* width) {
 
    Panel_setHeader(super, "Use CPUs:");
 
-   int curCpu = 0;
-   for (int i = 0; i < pl->cpuCount; i++) {
+   unsigned int curCpu = 0;
+   for (unsigned int i = 0; i < pl->existingCPUs; i++) {
+      if (!ProcessList_isCPUonline(this->pl, i))
+         continue;
+
       char number[16];
       xSnprintf(number, 9, "CPU %d", Settings_cpuId(pl->settings, i));
       unsigned cpu_width = 4 + strlen(number);
@@ -418,17 +421,17 @@ Panel* AffinityPanel_new(ProcessList* pl, Affinity* affinity, int* width) {
 }
 
 Affinity* AffinityPanel_getAffinity(Panel* super, ProcessList* pl) {
-   AffinityPanel* this = (AffinityPanel*) super;
+   const AffinityPanel* this = (AffinityPanel*) super;
    Affinity* affinity = Affinity_new(pl);
 
    #ifdef HAVE_LIBHWLOC
    int i;
    hwloc_bitmap_foreach_begin(i, this->workCpuset)
-   Affinity_add(affinity, i);
+      Affinity_add(affinity, (unsigned)i);
    hwloc_bitmap_foreach_end();
    #else
-   for (int i = 0; i < this->pl->cpuCount; i++) {
-      MaskItem* item = (MaskItem*)Vector_get(this->cpuids, i);
+   for (int i = 0; i < Vector_size(this->cpuids); i++) {
+      const MaskItem* item = (const MaskItem*)Vector_get(this->cpuids, i);
       if (item->value) {
          Affinity_add(affinity, item->cpu);
       }

AffinityPanel.h

@@ -3,17 +3,18 @@
 /*
 htop - AffinityPanel.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
-#include "Panel.h"
 #include "Affinity.h"
+#include "Panel.h"
 #include "ProcessList.h"
 
+
 extern const PanelClass AffinityPanel_class;
 
-Panel* AffinityPanel_new(ProcessList* pl, Affinity* affinity, int* width);
+Panel* AffinityPanel_new(ProcessList* pl, const Affinity* affinity, int* width);
 
 Affinity* AffinityPanel_getAffinity(Panel* super, ProcessList* pl);
 

AvailableColumnsPanel.c

@@ -1,21 +1,23 @@
 /*
 htop - AvailableColumnsPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "AvailableColumnsPanel.h"
 
+#include <assert.h>
 #include <ctype.h>
 #include <stdbool.h>
 #include <stdlib.h>
 
 #include "ColumnsPanel.h"
+#include "DynamicColumn.h"
 #include "FunctionBar.h"
+#include "Hashtable.h"
 #include "ListItem.h"
 #include "Object.h"
-#include "Platform.h"
 #include "Process.h"
 #include "ProvideCurses.h"
 #include "XUtils.h"
@@ -30,6 +32,15 @@ static void AvailableColumnsPanel_delete(Object* object) {
    free(this);
 }
 
+static void AvailableColumnsPanel_insert(AvailableColumnsPanel* this, int at, int key) {
+   const char* name;
+   if (key >= LAST_PROCESSFIELD)
+      name = DynamicColumn_init(key);
+   else
+      name = Process_fields[key].name;
+   Panel_insert(this->columns, at, (Object*) ListItem_new(name, key));
+}
+
 static HandlerResult AvailableColumnsPanel_eventHandler(Panel* super, int ch) {
    AvailableColumnsPanel* this = (AvailableColumnsPanel*) super;
    HandlerResult result = IGNORED;
@@ -43,9 +54,8 @@ static HandlerResult AvailableColumnsPanel_eventHandler(Panel* super, int ch) {
          if (!selected)
             break;
 
-         int key = selected->key;
          int at = Panel_getSelectedIndex(this->columns);
-         Panel_insert(this->columns, at, (Object*) ListItem_new(Process_fields[key].name, key));
+         AvailableColumnsPanel_insert(this, at, selected->key);
          Panel_setSelected(this->columns, at + 1);
          ColumnsPanel_update(this->columns);
          result = HANDLED;
@@ -69,14 +79,25 @@ const PanelClass AvailableColumnsPanel_class = {
    .eventHandler = AvailableColumnsPanel_eventHandler
 };
 
-AvailableColumnsPanel* AvailableColumnsPanel_new(Panel* columns) {
-   AvailableColumnsPanel* this = AllocThis(AvailableColumnsPanel);
-   Panel* super = (Panel*) this;
-   FunctionBar* fuBar = FunctionBar_new(AvailableColumnsFunctions, NULL, NULL);
-   Panel_init(super, 1, 1, 1, 1, Class(ListItem), true, fuBar);
+static void AvailableColumnsPanel_addDynamicColumn(ht_key_t key, void* value, void* data) {
+   const DynamicColumn* column = (const DynamicColumn*) value;
+   Panel* super = (Panel*) data;
+   const char* title = column->caption ? column->caption : column->heading;
+   if (!title)
+      title = column->name;  // fallback to the only mandatory field
+   char description[256];
+   xSnprintf(description, sizeof(description), "%s - %s", title, column->description);
+   Panel_add(super, (Object*) ListItem_new(description, key));
+}
 
-   Panel_setHeader(super, "Available Columns");
+// Handle DynamicColumns entries in the AvailableColumnsPanel
+static void AvailableColumnsPanel_addDynamicColumns(Panel* super, Hashtable* dynamicColumns) {
+   assert(dynamicColumns);
+   Hashtable_foreach(dynamicColumns, AvailableColumnsPanel_addDynamicColumn, super);
+}
 
+// Handle remaining Platform Meter entries in the AvailableColumnsPanel
+static void AvailableColumnsPanel_addPlatformColumn(Panel* super) {
    for (int i = 1; i < LAST_PROCESSFIELD; i++) {
       if (i != COMM && Process_fields[i].description) {
          char description[256];
@@ -84,6 +105,18 @@ AvailableColumnsPanel* AvailableColumnsPanel_new(Panel* columns) {
          Panel_add(super, (Object*) ListItem_new(description, i));
       }
    }
+}
+
+AvailableColumnsPanel* AvailableColumnsPanel_new(Panel* columns, Hashtable* dynamicColumns) {
+   AvailableColumnsPanel* this = AllocThis(AvailableColumnsPanel);
+   Panel* super = (Panel*) this;
+   FunctionBar* fuBar = FunctionBar_new(AvailableColumnsFunctions, NULL, NULL);
+   Panel_init(super, 1, 1, 1, 1, Class(ListItem), true, fuBar);
+
+   Panel_setHeader(super, "Available Columns");
+   AvailableColumnsPanel_addPlatformColumn(super);
+   AvailableColumnsPanel_addDynamicColumns(super, dynamicColumns);
+
    this->columns = columns;
    return this;
 }

AvailableColumnsPanel.h

@@ -3,12 +3,14 @@
 /*
 htop - AvailableColumnsPanel.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "Hashtable.h"
 #include "Panel.h"
 
+
 typedef struct AvailableColumnsPanel_ {
    Panel super;
    Panel* columns;
@@ -16,6 +18,6 @@ typedef struct AvailableColumnsPanel_ {
 
 extern const PanelClass AvailableColumnsPanel_class;
 
-AvailableColumnsPanel* AvailableColumnsPanel_new(Panel* columns);
+AvailableColumnsPanel* AvailableColumnsPanel_new(Panel* columns, Hashtable* dynamicColumns);
 
 #endif

AvailableMetersPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - AvailableMetersPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -12,9 +12,12 @@ in the source distribution for its full text.
 #include <stdlib.h>
 
 #include "CPUMeter.h"
+#include "DynamicMeter.h"
 #include "FunctionBar.h"
+#include "Hashtable.h"
 #include "Header.h"
 #include "ListItem.h"
+#include "Macros.h"
 #include "Meter.h"
 #include "MetersPanel.h"
 #include "Object.h"
@@ -27,14 +30,15 @@ static void AvailableMetersPanel_delete(Object* object) {
    Panel* super = (Panel*) object;
    AvailableMetersPanel* this = (AvailableMetersPanel*) object;
    Panel_done(super);
+   free(this->meterPanels);
    free(this);
 }
 
-static inline void AvailableMetersPanel_addMeter(Header* header, Panel* panel, const MeterClass* type, int param, int column) {
-   Meter* meter = Header_addMeterByClass(header, type, param, column);
-   Panel_add(panel, (Object*) Meter_toListItem(meter, false));
-   Panel_setSelected(panel, Panel_size(panel) - 1);
-   MetersPanel_setMoving((MetersPanel*)panel, true);
+static inline void AvailableMetersPanel_addMeter(Header* header, MetersPanel* panel, const MeterClass* type, unsigned int param, size_t column) {
+   const Meter* meter = Header_addMeterByClass(header, type, param, column);
+   Panel_add((Panel*)panel, (Object*) Meter_toListItem(meter, false));
+   Panel_setSelected((Panel*)panel, Panel_size((Panel*)panel) - 1);
+   MetersPanel_setMoving(panel, true);
 }
 
 static HandlerResult AvailableMetersPanel_eventHandler(Panel* super, int ch) {
@@ -45,7 +49,7 @@ static HandlerResult AvailableMetersPanel_eventHandler(Panel* super, int ch) {
    if (!selected)
       return IGNORED;
 
-   int param = selected->key & 0xff;
+   unsigned int param = selected->key & 0xffff;
    int type = selected->key >> 16;
    HandlerResult result = IGNORED;
    bool update = false;
@@ -55,7 +59,7 @@ static HandlerResult AvailableMetersPanel_eventHandler(Panel* super, int ch) {
       case 'l':
       case 'L':
       {
-         AvailableMetersPanel_addMeter(header, this->leftPanel, Platform_meterTypes[type], param, 0);
+         AvailableMetersPanel_addMeter(header, this->meterPanels[0], Platform_meterTypes[type], param, 0);
          result = HANDLED;
          update = true;
          break;
@@ -67,7 +71,7 @@ static HandlerResult AvailableMetersPanel_eventHandler(Panel* super, int ch) {
       case 'r':
       case 'R':
       {
-         AvailableMetersPanel_addMeter(header, this->rightPanel, Platform_meterTypes[type], param, 1);
+         AvailableMetersPanel_addMeter(header, this->meterPanels[this->columns - 1], Platform_meterTypes[type], param, this->columns - 1);
          result = (KEY_LEFT << 16) | SYNTH_KEY;
          update = true;
          break;
@@ -75,9 +79,11 @@ static HandlerResult AvailableMetersPanel_eventHandler(Panel* super, int ch) {
    }
    if (update) {
       this->settings->changed = true;
+      this->settings->lastUpdate++;
       Header_calculateHeight(header);
+      Header_updateData(header);
       Header_draw(header);
-      ScreenManager_resize(this->scr, this->scr->x1, header->height, this->scr->x2, this->scr->y2);
+      ScreenManager_resize(this->scr);
    }
    return result;
 }
@@ -90,7 +96,51 @@ const PanelClass AvailableMetersPanel_class = {
    .eventHandler = AvailableMetersPanel_eventHandler
 };
 
-AvailableMetersPanel* AvailableMetersPanel_new(Settings* settings, Header* header, Panel* leftMeters, Panel* rightMeters, ScreenManager* scr, ProcessList* pl) {
+// Handle (&CPUMeter_class) entries in the AvailableMetersPanel
+static void AvailableMetersPanel_addCPUMeters(Panel* super, const MeterClass* type, const ProcessList* pl) {
+   if (pl->existingCPUs > 1) {
+      Panel_add(super, (Object*) ListItem_new("CPU average", 0));
+      for (unsigned int i = 1; i <= pl->existingCPUs; i++) {
+         char buffer[50];
+         xSnprintf(buffer, sizeof(buffer), "%s %d", type->uiName, Settings_cpuId(pl->settings, i - 1));
+         Panel_add(super, (Object*) ListItem_new(buffer, i));
+      }
+   } else {
+      Panel_add(super, (Object*) ListItem_new(type->uiName, 1));
+   }
+}
+
+typedef struct {
+   Panel* super;
+   unsigned int id;
+   unsigned int offset;
+} DynamicIterator;
+
+static void AvailableMetersPanel_addDynamicMeter(ATTR_UNUSED ht_key_t key, void* value, void* data) {
+   const DynamicMeter* meter = (const DynamicMeter*)value;
+   DynamicIterator* iter = (DynamicIterator*)data;
+   unsigned int identifier = (iter->offset << 16) | iter->id;
+   const char* label = meter->description ? meter->description : meter->caption;
+   if (!label)
+      label = meter->name; /* last fallback to name, guaranteed set */
+   Panel_add(iter->super, (Object*) ListItem_new(label, identifier));
+   iter->id++;
+}
+
+// Handle (&DynamicMeter_class) entries in the AvailableMetersPanel
+static void AvailableMetersPanel_addDynamicMeters(Panel* super, const ProcessList* pl, unsigned int offset) {
+   DynamicIterator iter = { .super = super, .id = 1, .offset = offset };
+   assert(pl->dynamicMeters != NULL);
+   Hashtable_foreach(pl->dynamicMeters, AvailableMetersPanel_addDynamicMeter, &iter);
+}
+
+// Handle remaining Platform Meter entries in the AvailableMetersPanel
+static void AvailableMetersPanel_addPlatformMeter(Panel* super, const MeterClass* type, unsigned int offset) {
+   const char* label = type->description ? type->description : type->uiName;
+   Panel_add(super, (Object*) ListItem_new(label, offset << 16));
+}
+
+AvailableMetersPanel* AvailableMetersPanel_new(Settings* settings, Header* header, size_t columns, MetersPanel** meterPanels, ScreenManager* scr, const ProcessList* pl) {
    AvailableMetersPanel* this = AllocThis(AvailableMetersPanel);
    Panel* super = (Panel*) this;
    FunctionBar* fuBar = FunctionBar_newEnterEsc("Add   ", "Done   ");
@@ -98,31 +148,24 @@ AvailableMetersPanel* AvailableMetersPanel_new(Settings* settings, Header* heade
 
    this->settings = settings;
    this->header = header;
-   this->leftPanel = leftMeters;
-   this->rightPanel = rightMeters;
+   this->columns = columns;
+   this->meterPanels = meterPanels;
    this->scr = scr;
 
    Panel_setHeader(super, "Available meters");
-   // Platform_meterTypes[0] should be always (&CPUMeter_class), which we will
-   // handle separately in the code below.
-   for (int i = 1; Platform_meterTypes[i]; i++) {
+   // Platform_meterTypes[0] should be always (&CPUMeter_class) which we will
+   // handle separately in the code below.  Likewise, identifiers for Dynamic
+   // Meters are handled separately - similar to CPUs, this allows generation
+   // of multiple different Meters (also using 'param' to distinguish them).
+   for (unsigned int i = 1; Platform_meterTypes[i]; i++) {
       const MeterClass* type = Platform_meterTypes[i];
       assert(type != &CPUMeter_class);
-      const char* label = type->description ? type->description : type->uiName;
-      Panel_add(super, (Object*) ListItem_new(label, i << 16));
-   }
-   // Handle (&CPUMeter_class)
-   const MeterClass* type = &CPUMeter_class;
-   int cpus = pl->cpuCount;
-   if (cpus > 1) {
-      Panel_add(super, (Object*) ListItem_new("CPU average", 0));
-      for (int i = 1; i <= cpus; i++) {
-         char buffer[50];
-         xSnprintf(buffer, sizeof(buffer), "%s %d", type->uiName, Settings_cpuId(this->settings, i - 1));
-         Panel_add(super, (Object*) ListItem_new(buffer, i));
-      }
-   } else {
-      Panel_add(super, (Object*) ListItem_new("CPU", 1));
+      if (type == &DynamicMeter_class)
+         AvailableMetersPanel_addDynamicMeters(super, pl, i);
+      else
+         AvailableMetersPanel_addPlatformMeter(super, type, i);
    }
+   AvailableMetersPanel_addCPUMeters(super, &CPUMeter_class, pl);
+
    return this;
 }

AvailableMetersPanel.h

@@ -3,28 +3,32 @@
 /*
 htop - AvailableMetersPanel.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include <stddef.h>
+
 #include "Header.h"
+#include "MetersPanel.h"
 #include "Panel.h"
 #include "ProcessList.h"
 #include "ScreenManager.h"
 #include "Settings.h"
 
+
 typedef struct AvailableMetersPanel_ {
    Panel super;
    ScreenManager* scr;
 
    Settings* settings;
    Header* header;
-   Panel* leftPanel;
-   Panel* rightPanel;
+   size_t columns;
+   MetersPanel** meterPanels;
 } AvailableMetersPanel;
 
 extern const PanelClass AvailableMetersPanel_class;
 
-AvailableMetersPanel* AvailableMetersPanel_new(Settings* settings, Header* header, Panel* leftMeters, Panel* rightMeters, ScreenManager* scr, ProcessList* pl);
+AvailableMetersPanel* AvailableMetersPanel_new(Settings* settings, Header* header, size_t columns, MetersPanel **meterPanels, ScreenManager* scr, const ProcessList* pl);
 
 #endif

BatteryMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - BatteryMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 
 This meter written by Ian P. Hands (iphands@gmail.com, ihands@redhat.com).
@@ -21,7 +21,7 @@ static const int BatteryMeter_attributes[] = {
    BATTERY
 };
 
-static void BatteryMeter_updateValues(Meter* this, char* buffer, size_t len) {
+static void BatteryMeter_updateValues(Meter* this) {
    ACPresence isOnAC;
    double percent;
 
@@ -29,7 +29,7 @@ static void BatteryMeter_updateValues(Meter* this, char* buffer, size_t len) {
 
    if (isnan(percent)) {
       this->values[0] = NAN;
-      xSnprintf(buffer, len, "N/A");
+      xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "N/A");
       return;
    }
 
@@ -49,7 +49,7 @@ static void BatteryMeter_updateValues(Meter* this, char* buffer, size_t len) {
       break;
    }
 
-   xSnprintf(buffer, len, "%.1f%%%s", percent, text);
+   xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "%.1f%%%s", percent, text);
 }
 
 const MeterClass BatteryMeter_class = {

BatteryMeter.h

@@ -3,7 +3,7 @@
 /*
 htop - BatteryMeter.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 
 This meter written by Ian P. Hands (iphands@gmail.com, ihands@redhat.com).
@@ -11,6 +11,7 @@ This meter written by Ian P. Hands (iphands@gmail.com, ihands@redhat.com).
 
 #include "Meter.h"
 
+
 typedef enum ACPresence_ {
    AC_ABSENT,
    AC_PRESENT,

CONTRIBUTING.md

@@ -29,9 +29,9 @@ are always included, please send those in!
 Feature Requests
 ----------------
 
-Please label Github issues that are feature requests with the [`feature
-request`](https://github.com/htop-dev/htop/issues?utf8=%E2%9C%93&q=is%3Aissue+label%3A%22feature+request%22+)
-label.
+Please label Github issues that are feature requests with one of the `feature request`
+labels. If you can't do this yourself, don't worry. The friendly folks from the
+core team will distribute and fixup Github labels as part of the regular reviews.
 
 Style Guide
 -----------

COPYING

@@ -1,8 +1,8 @@
                     GNU GENERAL PUBLIC LICENSE
                        Version 2, June 1991
 
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.
-                          675 Mass Ave, Cambridge, MA 02139, USA
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -15,7 +15,7 @@ software--to make sure the software is free for all its users.  This
 General Public License applies to most of the Free Software
 Foundation's software and to any other program whose authors commit to
 using it.  (Some other Free Software Foundation software is covered by
-the GNU Library General Public License instead.)  You can apply it to
+the GNU Lesser General Public License instead.)  You can apply it to
 your programs, too.
 
   When we speak of free software, we are referring to freedom, not
@@ -55,7 +55,7 @@ patent must be licensed for everyone's free use or not licensed at all.
 
   The precise terms and conditions for copying, distribution and
 modification follow.
-
+
                     GNU GENERAL PUBLIC LICENSE
    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
@@ -110,7 +110,7 @@ above, provided that you also meet all of these conditions:
     License.  (Exception: if the Program itself is interactive but
     does not normally print such an announcement, your work based on
     the Program is not required to print an announcement.)
-
+
 These requirements apply to the modified work as a whole.  If
 identifiable sections of that work are not derived from the Program,
 and can be reasonably considered independent and separate works in
@@ -168,7 +168,7 @@ access to copy from a designated place, then offering equivalent
 access to copy the source code from the same place counts as
 distribution of the source code, even though third parties are not
 compelled to copy the source along with the object code.
-
+
   4. You may not copy, modify, sublicense, or distribute the Program
 except as expressly provided under this License.  Any attempt
 otherwise to copy, modify, sublicense or distribute the Program is
@@ -225,7 +225,7 @@ impose that choice.
 
 This section is intended to make thoroughly clear what is believed to
 be a consequence of the rest of this License.
-
+
   8. If the distribution and/or use of the Program is restricted in
 certain countries either by patents or by copyrighted interfaces, the
 original copyright holder who places the Program under this License
@@ -278,8 +278,8 @@ PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGES.
 
                      END OF TERMS AND CONDITIONS
-
-	Appendix: How to Apply These Terms to Your New Programs
+
+            How to Apply These Terms to Your New Programs
 
   If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
@@ -291,7 +291,7 @@ convey the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
 
     <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) 19yy  <name of author>
+    Copyright (C) <year>  <name of author>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -303,16 +303,16 @@ the "copyright" line and a pointer to where the full notice is found.
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
-    You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 Also add information on how to contact you by electronic and paper mail.
 
 If the program is interactive, make it output a short notice like this
 when it starts in an interactive mode:
 
-    Gnomovision version 69, Copyright (C) 19yy name of author
+    Gnomovision version 69, Copyright (C) year name of author
     Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
     This is free software, and you are welcome to redistribute it
     under certain conditions; type `show c' for details.
@@ -335,21 +335,5 @@ necessary.  Here is a sample; alter the names:
 This General Public License does not permit incorporating your program into
 proprietary programs.  If your program is a subroutine library, you may
 consider it more useful to permit linking proprietary applications with the
-library.  If this is what you want to do, use the GNU Library General
+library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.
-
-
-	Appendix 2: Special exception concerning PLPA
-
- In the following exception, "PLPA" means (i) code released by the
- Portable Linux Processor Affinity Project, or (ii) derivative works of
- such code, in both cases provided that the code is covered entirely by
- free software licensing terms.
-
- As a special exception to the GNU GPL, the licensors of htop give you
- permission to combine GNU GPL-licensed code in htop (and derivative
- works of such code) with PLPA. You may copy and distribute such a
- combined work following the terms of the GNU GPL for htop and the
- applicable licenses of the version of PLPA used in your combined work,
- provided that you include the source code of such version of PLPA when
- and as the GNU GPL requires distribution of source code.

CPUMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - CPUMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -10,7 +10,6 @@ in the source distribution for its full text.
 #include "CPUMeter.h"
 
 #include <math.h>
-#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -35,37 +34,48 @@ static const int CPUMeter_attributes[] = {
 };
 
 typedef struct CPUMeterData_ {
-   int cpus;
+   unsigned int cpus;
    Meter** meters;
 } CPUMeterData;
 
 static void CPUMeter_init(Meter* this) {
-   int cpu = this->param;
-   if (this->pl->cpuCount > 1) {
+   unsigned int cpu = this->param;
+   if (cpu == 0) {
+      Meter_setCaption(this, "Avg");
+   } else if (this->pl->activeCPUs > 1) {
       char caption[10];
-      xSnprintf(caption, sizeof(caption), "%3d", Settings_cpuId(this->pl->settings, cpu - 1));
+      xSnprintf(caption, sizeof(caption), "%3u", Settings_cpuId(this->pl->settings, cpu - 1));
       Meter_setCaption(this, caption);
    }
-   if (this->param == 0)
-      Meter_setCaption(this, "Avg");
 }
 
-static void CPUMeter_updateValues(Meter* this, char* buffer, size_t size) {
-   int cpu = this->param;
-   if (cpu > this->pl->cpuCount) {
-      xSnprintf(buffer, size, "absent");
-      for (uint8_t i = 0; i < this->curItems; i++)
-         this->values[i] = 0;
+// Custom uiName runtime logic to include the param (processor)
+static void CPUMeter_getUiName(const Meter* this, char* buffer, size_t length) {
+   if (this->param > 0)
+      xSnprintf(buffer, length, "%s %u", Meter_uiName(this), this->param);
+   else
+      xSnprintf(buffer, length, "%s", Meter_uiName(this));
+}
+
+static void CPUMeter_updateValues(Meter* this) {
+   memset(this->values, 0, sizeof(double) * CPU_METER_ITEMCOUNT);
+
+   unsigned int cpu = this->param;
+   if (cpu > this->pl->existingCPUs) {
+      xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "absent");
+      return;
+   }
+
+   double percent = Platform_setCPUValues(this, cpu);
+   if (isnan(percent)) {
+      xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "offline");
       return;
    }
-   memset(this->values, 0, sizeof(double) * CPU_METER_ITEMCOUNT);
 
    char cpuUsageBuffer[8] = { 0 };
    char cpuFrequencyBuffer[16] = { 0 };
    char cpuTemperatureBuffer[16] = { 0 };
 
-   double percent = Platform_setCPUValues(this, cpu);
-
    if (this->pl->settings->showCPUUsage) {
       xSnprintf(cpuUsageBuffer, sizeof(cpuUsageBuffer), "%.1f%%", percent);
    }
@@ -79,7 +89,7 @@ static void CPUMeter_updateValues(Meter* this, char* buffer, size_t size) {
       }
    }
 
-   #ifdef HAVE_SENSORS_SENSORS_H
+   #ifdef BUILD_WITH_CPU_TEMP
    if (this->pl->settings->showCPUTemperature) {
       double cpuTemperature = this->values[CPU_METER_TEMPERATURE];
       if (isnan(cpuTemperature))
@@ -91,7 +101,7 @@ static void CPUMeter_updateValues(Meter* this, char* buffer, size_t size) {
    }
    #endif
 
-   xSnprintf(buffer, size, "%s%s%s%s%s",
+   xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "%s%s%s%s%s",
              cpuUsageBuffer,
              (cpuUsageBuffer[0] && (cpuFrequencyBuffer[0] || cpuTemperatureBuffer[0])) ? " " : "",
              cpuFrequencyBuffer,
@@ -101,75 +111,82 @@ static void CPUMeter_updateValues(Meter* this, char* buffer, size_t size) {
 
 static void CPUMeter_display(const Object* cast, RichString* out) {
    char buffer[50];
+   int len;
    const Meter* this = (const Meter*)cast;
-   RichString_prune(out);
-   if (this->param > this->pl->cpuCount) {
-      RichString_appendAscii(out, CRT_colors[METER_TEXT], "absent");
+
+   if (this->param > this->pl->existingCPUs) {
+      RichString_appendAscii(out, CRT_colors[METER_SHADOW], " absent");
       return;
    }
-   xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_NORMAL]);
+
+   if (this->curItems == 0) {
+      RichString_appendAscii(out, CRT_colors[METER_SHADOW], " offline");
+      return;
+   }
+
+   len = xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_NORMAL]);
    RichString_appendAscii(out, CRT_colors[METER_TEXT], ":");
-   RichString_appendAscii(out, CRT_colors[CPU_NORMAL], buffer);
+   RichString_appendnAscii(out, CRT_colors[CPU_NORMAL], buffer, len);
    if (this->pl->settings->detailedCPUTime) {
-      xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_KERNEL]);
+      len = xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_KERNEL]);
       RichString_appendAscii(out, CRT_colors[METER_TEXT], "sy:");
-      RichString_appendAscii(out, CRT_colors[CPU_SYSTEM], buffer);
-      xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_NICE]);
+      RichString_appendnAscii(out, CRT_colors[CPU_SYSTEM], buffer, len);
+      len = xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_NICE]);
       RichString_appendAscii(out, CRT_colors[METER_TEXT], "ni:");
-      RichString_appendAscii(out, CRT_colors[CPU_NICE_TEXT], buffer);
-      xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_IRQ]);
+      RichString_appendnAscii(out, CRT_colors[CPU_NICE_TEXT], buffer, len);
+      len = xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_IRQ]);
       RichString_appendAscii(out, CRT_colors[METER_TEXT], "hi:");
-      RichString_appendAscii(out, CRT_colors[CPU_IRQ], buffer);
-      xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_SOFTIRQ]);
+      RichString_appendnAscii(out, CRT_colors[CPU_IRQ], buffer, len);
+      len = xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_SOFTIRQ]);
       RichString_appendAscii(out, CRT_colors[METER_TEXT], "si:");
-      RichString_appendAscii(out, CRT_colors[CPU_SOFTIRQ], buffer);
+      RichString_appendnAscii(out, CRT_colors[CPU_SOFTIRQ], buffer, len);
       if (!isnan(this->values[CPU_METER_STEAL])) {
-         xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_STEAL]);
+         len = xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_STEAL]);
          RichString_appendAscii(out, CRT_colors[METER_TEXT], "st:");
-         RichString_appendAscii(out, CRT_colors[CPU_STEAL], buffer);
+         RichString_appendnAscii(out, CRT_colors[CPU_STEAL], buffer, len);
       }
       if (!isnan(this->values[CPU_METER_GUEST])) {
-         xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_GUEST]);
+         len = xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_GUEST]);
          RichString_appendAscii(out, CRT_colors[METER_TEXT], "gu:");
-         RichString_appendAscii(out, CRT_colors[CPU_GUEST], buffer);
+         RichString_appendnAscii(out, CRT_colors[CPU_GUEST], buffer, len);
       }
-      xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_IOWAIT]);
+      len = xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_IOWAIT]);
       RichString_appendAscii(out, CRT_colors[METER_TEXT], "wa:");
-      RichString_appendAscii(out, CRT_colors[CPU_IOWAIT], buffer);
+      RichString_appendnAscii(out, CRT_colors[CPU_IOWAIT], buffer, len);
    } else {
-      xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_KERNEL]);
+      len = xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_KERNEL]);
       RichString_appendAscii(out, CRT_colors[METER_TEXT], "sys:");
-      RichString_appendAscii(out, CRT_colors[CPU_SYSTEM], buffer);
-      xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_NICE]);
+      RichString_appendnAscii(out, CRT_colors[CPU_SYSTEM], buffer, len);
+      len = xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_NICE]);
       RichString_appendAscii(out, CRT_colors[METER_TEXT], "low:");
-      RichString_appendAscii(out, CRT_colors[CPU_NICE_TEXT], buffer);
+      RichString_appendnAscii(out, CRT_colors[CPU_NICE_TEXT], buffer, len);
       if (!isnan(this->values[CPU_METER_IRQ])) {
-         xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_IRQ]);
+         len = xSnprintf(buffer, sizeof(buffer), "%5.1f%% ", this->values[CPU_METER_IRQ]);
          RichString_appendAscii(out, CRT_colors[METER_TEXT], "vir:");
-         RichString_appendAscii(out, CRT_colors[CPU_GUEST], buffer);
+         RichString_appendnAscii(out, CRT_colors[CPU_GUEST], buffer, len);
       }
    }
 
-   #ifdef HAVE_SENSORS_SENSORS_H
+   #ifdef BUILD_WITH_CPU_TEMP
    if (this->pl->settings->showCPUTemperature) {
       char cpuTemperatureBuffer[10];
       double cpuTemperature = this->values[CPU_METER_TEMPERATURE];
       if (isnan(cpuTemperature)) {
-         xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "N/A");
+         len = xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "N/A");
       } else if (this->pl->settings->degreeFahrenheit) {
-         xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "%5.1f%sF", cpuTemperature * 9 / 5 + 32, CRT_degreeSign);
+         len = xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "%5.1f%sF", cpuTemperature * 9 / 5 + 32, CRT_degreeSign);
       } else {
-         xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "%5.1f%sC", cpuTemperature, CRT_degreeSign);
+         len = xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "%5.1f%sC", cpuTemperature, CRT_degreeSign);
       }
       RichString_appendAscii(out, CRT_colors[METER_TEXT], "temp:");
-      RichString_appendWide(out, CRT_colors[METER_VALUE], cpuTemperatureBuffer);
+      RichString_appendnWide(out, CRT_colors[METER_VALUE], cpuTemperatureBuffer, len);
    }
    #endif
 }
 
-static void AllCPUsMeter_getRange(Meter* this, int* start, int* count) {
-   CPUMeterData* data = this->meterData;
-   int cpus = data->cpus;
+static void AllCPUsMeter_getRange(const Meter* this, int* start, int* count) {
+   const CPUMeterData* data = this->meterData;
+   unsigned int cpus = data->cpus;
    switch(Meter_name(this)[0]) {
       default:
       case 'A': // All
@@ -187,8 +204,17 @@ static void AllCPUsMeter_getRange(Meter* this, int* start, int* count) {
    }
 }
 
+static void AllCPUsMeter_updateValues(Meter* this) {
+   CPUMeterData* data = this->meterData;
+   Meter** meters = data->meters;
+   int start, count;
+   AllCPUsMeter_getRange(this, &start, &count);
+   for (int i = 0; i < count; i++)
+      Meter_updateValues(meters[i]);
+}
+
 static void CPUMeterCommonInit(Meter* this, int ncol) {
-   int cpus = this->pl->cpuCount;
+   unsigned int cpus = this->pl->existingCPUs;
    CPUMeterData* data = this->meterData;
    if (!data) {
       data = this->meterData = xMalloc(sizeof(CPUMeterData));
@@ -316,6 +342,7 @@ const MeterClass CPUMeter_class = {
       .display = CPUMeter_display
    },
    .updateValues = CPUMeter_updateValues,
+   .getUiName = CPUMeter_getUiName,
    .defaultMode = BAR_METERMODE,
    .maxItems = CPU_METER_ITEMCOUNT,
    .total = 100.0,
@@ -332,6 +359,7 @@ const MeterClass AllCPUsMeter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
@@ -351,7 +379,9 @@ const MeterClass AllCPUs2Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "AllCPUs2",
@@ -370,7 +400,9 @@ const MeterClass LeftCPUsMeter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "LeftCPUs",
@@ -389,7 +421,9 @@ const MeterClass RightCPUsMeter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "RightCPUs",
@@ -408,7 +442,9 @@ const MeterClass LeftCPUs2Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "LeftCPUs2",
@@ -427,7 +463,9 @@ const MeterClass RightCPUs2Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "RightCPUs2",
@@ -446,7 +484,9 @@ const MeterClass AllCPUs4Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "AllCPUs4",
@@ -465,7 +505,9 @@ const MeterClass LeftCPUs4Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "LeftCPUs4",
@@ -484,7 +526,9 @@ const MeterClass RightCPUs4Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "RightCPUs4",
@@ -503,7 +547,9 @@ const MeterClass AllCPUs8Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "AllCPUs8",
@@ -522,7 +568,9 @@ const MeterClass LeftCPUs8Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "LeftCPUs8",
@@ -541,7 +589,9 @@ const MeterClass RightCPUs8Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "RightCPUs8",

CPUMeter.h

@@ -3,12 +3,13 @@
 /*
 htop - CPUMeter.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "Meter.h"
 
+
 typedef enum {
    CPU_METER_NICE = 0,
    CPU_METER_NORMAL = 1,

CRT.h

@@ -3,7 +3,7 @@
 /*
 htop - CRT.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -13,19 +13,23 @@ in the source distribution for its full text.
 
 #include "Macros.h"
 #include "ProvideCurses.h"
+#include "Settings.h"
 
-
-typedef enum TreeStr_ {
+typedef enum TreeStr_
+{
    TREE_STR_VERT,
    TREE_STR_RTEE,
    TREE_STR_BEND,
    TREE_STR_TEND,
    TREE_STR_OPEN,
    TREE_STR_SHUT,
+   TREE_STR_ASC,
+   TREE_STR_DESC,
    LAST_TREE_STR
 } TreeStr;
 
-typedef enum ColorScheme_ {
+typedef enum ColorScheme_
+{
    COLORSCHEME_DEFAULT,
    COLORSCHEME_MONOCHROME,
    COLORSCHEME_BLACKONWHITE,
@@ -36,7 +40,8 @@ typedef enum ColorScheme_ {
    LAST_COLORSCHEME
 } ColorScheme;
 
-typedef enum ColorElements_ {
+typedef enum ColorElements_
+{
    RESET_COLOR,
    DEFAULT_COLOR,
    FUNCTION_BAR,
@@ -50,6 +55,7 @@ typedef enum ColorElements_ {
    PANEL_SELECTION_FOLLOW,
    PANEL_SELECTION_UNFOCUS,
    LARGE_NUMBER,
+   METER_SHADOW,
    METER_TEXT,
    METER_VALUE,
    METER_VALUE_ERROR,
@@ -57,18 +63,22 @@ typedef enum ColorElements_ {
    METER_VALUE_IOWRITE,
    METER_VALUE_NOTICE,
    METER_VALUE_OK,
+   METER_VALUE_WARN,
    LED_COLOR,
    UPTIME,
+   TEMP,
+   FREQ,
    BATTERY,
    TASKS_RUNNING,
    SWAP,
+   SWAP_CACHE,
    PROCESS,
    PROCESS_SHADOW,
    PROCESS_TAG,
    PROCESS_MEGABYTES,
    PROCESS_GIGABYTES,
    PROCESS_TREE,
-   PROCESS_R_STATE,
+   PROCESS_RUN_STATE,
    PROCESS_D_STATE,
    PROCESS_BASENAME,
    PROCESS_HIGH_PRIORITY,
@@ -87,6 +97,11 @@ typedef enum ColorElements_ {
    MEMORY_BUFFERS,
    MEMORY_BUFFERS_TEXT,
    MEMORY_CACHE,
+   MEMORY_SHARED,
+   HUGEPAGE_1,
+   HUGEPAGE_2,
+   HUGEPAGE_3,
+   HUGEPAGE_4,
    LOAD,
    LOAD_AVERAGE_FIFTEEN,
    LOAD_AVERAGE_FIVE,
@@ -98,6 +113,7 @@ typedef enum ColorElements_ {
    DATE,
    DATETIME,
    HELP_BOLD,
+   HELP_SHADOW,
    HOSTNAME,
    CPU_NICE,
    CPU_NICE_TEXT,
@@ -108,6 +124,11 @@ typedef enum ColorElements_ {
    CPU_SOFTIRQ,
    CPU_STEAL,
    CPU_GUEST,
+   PANEL_EDIT,
+   SCREENS_OTH_BORDER,
+   SCREENS_OTH_TEXT,
+   SCREENS_CUR_BORDER,
+   SCREENS_CUR_TEXT,
    PRESSURE_STALL_TEN,
    PRESSURE_STALL_SIXTY,
    PRESSURE_STALL_THREEHUNDRED,
@@ -119,16 +140,33 @@ typedef enum ColorElements_ {
    ZFS_COMPRESSED,
    ZFS_RATIO,
    ZRAM,
+   DYNAMIC_GRAY,
+   DYNAMIC_DARKGRAY,
+   DYNAMIC_RED,
+   DYNAMIC_GREEN,
+   DYNAMIC_BLUE,
+   DYNAMIC_CYAN,
+   DYNAMIC_MAGENTA,
+   DYNAMIC_YELLOW,
+   DYNAMIC_WHITE,
    LAST_COLORELEMENT
 } ColorElements;
 
 void CRT_fatalError(const char *note) ATTR_NORETURN;
 
+#ifdef NDEBUG
+#define CRT_debug(...)
+#else
+void CRT_debug_impl(const char *file, size_t lineno, const char *func, const char *fmt, ...) ATTR_FORMAT(printf, 4, 5);
+#define CRT_debug(...) CRT_debug_impl(__FILE__, __LINE__, __func__, __VA_ARGS__)
+#endif
+
 void CRT_handleSIGSEGV(int signal) ATTR_NORETURN;
 
-#define KEY_WHEELUP   KEY_F(20)
-#define KEY_WHEELDOWN KEY_F(21)
-#define KEY_RECLICK   KEY_F(22)
+#define KEY_WHEELUP KEY_F(30)
+#define KEY_WHEELDOWN KEY_F(31)
+#define KEY_RECLICK KEY_F(32)
+#define KEY_SHIFT_TAB KEY_F(33)
 #define KEY_ALT(x) (KEY_F(64 - 26) + ((x) - 'A'))
 
 extern const char *CRT_degreeSign;
@@ -151,24 +189,14 @@ extern int CRT_scrollWheelVAmount;
 
 extern ColorScheme CRT_colorScheme;
 
-#ifdef HAVE_SETUID_ENABLED
+void CRT_setMouse(bool enabled);
 
-void CRT_dropPrivileges(void);
-
-void CRT_restorePrivileges(void);
-
-#else /* HAVE_SETUID_ENABLED */
-
-/* Turn setuid operations into NOPs */
-static inline void CRT_dropPrivileges(void) { }
-static inline void CRT_restorePrivileges(void) { }
-
-#endif /* HAVE_SETUID_ENABLED */
-
-void CRT_init(const int* delay, int colorScheme, bool allowUnicode);
+void CRT_init(const Settings *settings, bool allowUnicode);
 
 void CRT_done(void);
 
+void CRT_resetSignalHandlers(void);
+
 int CRT_readKey(void);
 
 void CRT_disableDelay(void);

CategoriesPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - CategoriesPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -14,14 +14,19 @@ in the source distribution for its full text.
 #include "AvailableColumnsPanel.h"
 #include "AvailableMetersPanel.h"
 #include "ColorsPanel.h"
-#include "ColumnsPanel.h"
 #include "DisplayOptionsPanel.h"
 #include "FunctionBar.h"
+#include "Header.h"
+#include "HeaderLayout.h"
+#include "HeaderOptionsPanel.h"
 #include "ListItem.h"
+#include "Macros.h"
 #include "MetersPanel.h"
 #include "Object.h"
 #include "ProvideCurses.h"
+#include "ScreensPanel.h"
 #include "Vector.h"
+#include "XUtils.h"
 
 
 static const char* const CategoriesFunctions[] = {"      ", "      ", "      ", "      ", "      ", "      ", "      ", "      ", "      ", "Done  ", NULL};
@@ -33,14 +38,24 @@ static void CategoriesPanel_delete(Object* object) {
    free(this);
 }
 
-void CategoriesPanel_makeMetersPage(CategoriesPanel* this) {
-   MetersPanel* leftMeters = MetersPanel_new(this->settings, "Left column", this->header->columns[0], this->scr);
-   MetersPanel* rightMeters = MetersPanel_new(this->settings, "Right column", this->header->columns[1], this->scr);
-   leftMeters->rightNeighbor = rightMeters;
-   rightMeters->leftNeighbor = leftMeters;
-   Panel* availableMeters = (Panel*) AvailableMetersPanel_new(this->settings, this->header, (Panel*) leftMeters, (Panel*) rightMeters, this->scr, this->pl);
-   ScreenManager_add(this->scr, (Panel*) leftMeters, 20);
-   ScreenManager_add(this->scr, (Panel*) rightMeters, 20);
+static void CategoriesPanel_makeMetersPage(CategoriesPanel* this) {
+   size_t columns = HeaderLayout_getColumns(this->scr->header->headerLayout);
+   MetersPanel** meterPanels = xMallocArray(columns, sizeof(MetersPanel*));
+
+   for (size_t i = 0; i < columns; i++) {
+      char titleBuffer[32];
+      xSnprintf(titleBuffer, sizeof(titleBuffer), "Column %zu", i + 1);
+      meterPanels[i] = MetersPanel_new(this->settings, titleBuffer, this->header->columns[i], this->scr);
+
+      if (i != 0) {
+         meterPanels[i]->leftNeighbor = meterPanels[i - 1];
+         meterPanels[i - 1]->rightNeighbor = meterPanels[i];
+      }
+
+      ScreenManager_add(this->scr, (Panel*) meterPanels[i], 20);
+   }
+
+   Panel* availableMeters = (Panel*) AvailableMetersPanel_new(this->settings, this->header, columns, meterPanels, this->scr, this->pl);
    ScreenManager_add(this->scr, availableMeters, -1);
 }
 
@@ -50,17 +65,38 @@ static void CategoriesPanel_makeDisplayOptionsPage(CategoriesPanel* this) {
 }
 
 static void CategoriesPanel_makeColorsPage(CategoriesPanel* this) {
-   Panel* colors = (Panel*) ColorsPanel_new(this->settings, this->scr);
+   Panel* colors = (Panel*) ColorsPanel_new(this->settings);
    ScreenManager_add(this->scr, colors, -1);
 }
 
-static void CategoriesPanel_makeColumnsPage(CategoriesPanel* this) {
-   Panel* columns = (Panel*) ColumnsPanel_new(this->settings);
-   Panel* availableColumns = (Panel*) AvailableColumnsPanel_new(columns);
+static void CategoriesPanel_makeScreensPage(CategoriesPanel* this) {
+   Panel* screens = (Panel*) ScreensPanel_new(this->settings);
+   Panel* columns = (Panel*) ((ScreensPanel*)screens)->columns;
+   Panel* availableColumns = (Panel*) AvailableColumnsPanel_new(columns, this->settings->dynamicColumns);
+   ScreenManager_add(this->scr, screens, 20);
    ScreenManager_add(this->scr, columns, 20);
    ScreenManager_add(this->scr, availableColumns, -1);
 }
 
+static void CategoriesPanel_makeHeaderOptionsPage(CategoriesPanel* this) {
+   Panel* colors = (Panel*) HeaderOptionsPanel_new(this->settings, this->scr);
+   ScreenManager_add(this->scr, colors, -1);
+}
+
+typedef void (* CategoriesPanel_makePageFunc)(CategoriesPanel* ref);
+typedef struct CategoriesPanelPage_ {
+   const char* name;
+   CategoriesPanel_makePageFunc ctor;
+} CategoriesPanelPage;
+
+static const CategoriesPanelPage categoriesPanelPages[] = {
+   { .name = "Display options", .ctor = CategoriesPanel_makeDisplayOptionsPage },
+   { .name = "Header layout", .ctor = CategoriesPanel_makeHeaderOptionsPage },
+   { .name = "Meters", .ctor = CategoriesPanel_makeMetersPage },
+   { .name = "Screens", .ctor = CategoriesPanel_makeScreensPage },
+   { .name = "Colors", .ctor = CategoriesPanel_makeColorsPage },
+};
+
 static HandlerResult CategoriesPanel_eventHandler(Panel* super, int ch) {
    CategoriesPanel* this = (CategoriesPanel*) super;
 
@@ -98,19 +134,8 @@ static HandlerResult CategoriesPanel_eventHandler(Panel* super, int ch) {
       for (int i = 1; i < size; i++)
          ScreenManager_remove(this->scr, 1);
 
-      switch (selected) {
-         case 0:
-            CategoriesPanel_makeMetersPage(this);
-            break;
-         case 1:
-            CategoriesPanel_makeDisplayOptionsPage(this);
-            break;
-         case 2:
-            CategoriesPanel_makeColorsPage(this);
-            break;
-         case 3:
-            CategoriesPanel_makeColumnsPage(this);
-            break;
+      if (selected >= 0 && (size_t)selected < ARRAYSIZE(categoriesPanelPages)) {
+         categoriesPanelPages[selected].ctor(this);
       }
    }
    return result;
@@ -134,10 +159,11 @@ CategoriesPanel* CategoriesPanel_new(ScreenManager* scr, Settings* settings, Hea
    this->settings = settings;
    this->header = header;
    this->pl = pl;
-   Panel_setHeader(super, "Setup");
-   Panel_add(super, (Object*) ListItem_new("Meters", 0));
-   Panel_add(super, (Object*) ListItem_new("Display options", 0));
-   Panel_add(super, (Object*) ListItem_new("Colors", 0));
-   Panel_add(super, (Object*) ListItem_new("Columns", 0));
+   Panel_setHeader(super, "Categories");
+   for (size_t i = 0; i < ARRAYSIZE(categoriesPanelPages); i++)
+      Panel_add(super, (Object*) ListItem_new(categoriesPanelPages[i].name, 0));
+
+   ScreenManager_add(scr, super, 16);
+   categoriesPanelPages[0].ctor(this);
    return this;
 }

CategoriesPanel.h

@@ -3,7 +3,7 @@
 /*
 htop - CategoriesPanel.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -13,6 +13,7 @@ in the source distribution for its full text.
 #include "ScreenManager.h"
 #include "Settings.h"
 
+
 typedef struct CategoriesPanel_ {
    Panel super;
    ScreenManager* scr;
@@ -22,8 +23,6 @@ typedef struct CategoriesPanel_ {
    ProcessList* pl;
 } CategoriesPanel;
 
-void CategoriesPanel_makeMetersPage(CategoriesPanel* this);
-
 extern const PanelClass CategoriesPanel_class;
 
 CategoriesPanel* CategoriesPanel_new(ScreenManager* scr, Settings* settings, Header* header, ProcessList* pl);

ChangeLog

@@ -1,3 +1,265 @@
+What's new in version 3.2.1
+
+* Fix setting to show all branches collapsed by default
+* Restore functionality of stripExeFromCmdline setting
+* Fix some command line display settings not being honored without restart
+* Display single digit precision for CPU% greater than 99.9%
+* On Linux, FreeBSD and PCP consider only shrinkable ZFS ARC as cache
+* On Linux, increase field width of CPUD% and SWAPD% columns
+* Colorize process state characters in help screen
+* Use mousemask(3X) to enable and disable mouse control
+* Fix heap buffer overflow in Vector_compact
+* On Solaris, fix a process time scaling error
+* On Solaris, fix the build
+* On NetBSD, OpenBSD and Solaris ensure env buffer size is sufficient
+* On Linux, resolve processes exiting interfering with sampling
+* Fix ProcessList quadratic removal when scanning processes
+* Under LXC, limit CPU count to that given by /proc/cpuinfo
+* Improve container detection for LXC
+* Some minor documentation fixes
+
+What's new in version 3.2.0
+
+* Support for displaying multiple tabs in the user interface
+* Allow multiple filter and search terms (logical OR, separate by "|")
+* Set correct default sorting direction (defaultSortDesc)
+* Improve performance for process lookup and update
+* Rework the IOMeters initial display
+* Removed duplicate sections on COMM and EXE
+* Highlight process UNINTERRUPTIBLE_WAIT state (D)
+* Show only integer value when CPU% more than 99.9%
+* Handle rounding ambiguity between 99.9 and 100.0%
+* No longer leaves empty the last column in header
+* Fix header layout and meters reset if a header column is empty
+* Fix PID and UID column widths off-by-one error
+* On Linux, read generic sysfs batteries
+* On Linux, do not collect LRS per thread (it is process-wide)
+* On Linux, dynamically adjust the SECATTR and CGROUP column widths
+* On Linux, fix a crash in LXD
+* On FreeBSD, add support for showing process emulation
+* On Darwin, lazily set process TTY name
+* Always set SIGCHLD to default handling
+* Avoid zombie processes on signal races
+* Ensure last line is cleared when SIGINT is received
+* Instead of SIGTERM, pre-select the last sent signal
+* Internal Hashtable performance and sizing improvements
+* Add heuristics for guessing LXC or Docker from /proc/1/mounts
+* Force elapsed time display to zero if process started in the future
+* Avoid extremely large year values when printing time
+* Fix division by zero when calculating IO rates
+* Fix out of boundary writes in XUtils
+* Fix custom thread name display issue
+* Use AC_CANONICAL_HOST, not AC_CANONICAL_TARGET in configure.ac
+* Support libunwind of LLVM
+
+What's new in version 3.1.2
+
+* Bugfix for crash when storing modified settings at exit
+* Generate xz-compressed source tarball (with configure) using github actions
+* Allow -u UID with numerical value as argument
+* Added documentation for obsolete/state libraries/program files highlighting
+* Some obsolete/stale library highlighting refinements
+* Column width issues resolved
+* Dynamic UID column sizing improved
+* Discard stale information from Disk and Network I/O meters
+* Refined Linux kernel thread detection
+* Reworked process state handling
+* New CCGROUP column showing abbreviated cgroup name
+* New OFFSET column in the list of open files screen
+
+What's new in version 3.1.1
+
+* Update license headers to explicitly say GPLv2+
+* Document minimum version for libcap (thanks to James Brown)
+* Fix mouse wheel collision with autogroups nice adjustment
+* Adjust Makefile.am macro definitions for older automake versions
+* Ensure consistent reporting of MemoryMeter 'used' memory
+* Report hugepage memory as real and used memory (as before)
+* Handle procExeDeleted, usesDeletedLib without mergedCommandline mode
+* Validate meter configuration before proceeding beyond htoprc parsing
+* Properly release memory on partially read configuration
+* Handle interrupted sampling from within libpcp PDU transfers
+* On Linux, provide O_PATH value if not defined
+* On Linux, always compute procExeDeleted if already set
+* Workaround for Rosetta 2 on Darwin (thanks to Alexander Momchilov)
+* Fix FreeBSD cmdline memory leak in Process_updateCmdline, and
+* Plug a Disk I/O meter memory leak on FreeBSD (thanks to Ximalas)
+
+What's new in version 3.1.0
+
+* Updated COPYING file to remove the PLPA exemption (appendix 2)
+  With this change the license is now GPLv2 without any additional wording.
+* Improved default sort ordering
+  Note for users: This may lead to an inverted sort order on startup of
+  htop 3.1.0 compared to previous versions.
+  This is due to what is stored in your htoprc file. Solution: Press I
+  (to invert sort order).
+  This changed setting will be saved by htop on exit as long as it can
+  write to your htoprc file.
+* The compile-time option to cater specifically for running htop as
+  setuid has been removed
+* Add read-only option
+  This allows htop to be run in an non-intrusive fashion where it acts only
+  as a process viewer disabling all functions to manipulate system state.
+  Note: This is not a security feature!
+* Move the code for handling the command line formatting related tasks
+  to be shared across all platforms
+  This means important features like stale binary/library highlighting
+  can now be available on all supported platforms.
+* Make the EXE and COMM columns available on all platforms
+  All supported platforms have the name of the executable (EXE) and a
+  self-chosen thread/command name (COMM) available one way or the other.
+  Moving this column to be handled as a platform-independently available
+  information simplifies the markup of the command line.
+* Introduce configuration file versioning and config_reader_min_version
+  Starting with this version the configuration file contains a version
+  identifying the minimum version of the configuration parser needed to
+  fully understand the configuration file format.
+  Old configuration file formats are automatically upgraded when
+  saving the config file (htoprc).
+* Make the configuration parser friendlier to users (thanks to Bart Bakker)
+  With this change only settings that cannot be parsed properly are
+  reset to their defaults.
+* Improve default display for systems with many CPUs
+* Add the process ELAPSED time column
+* Improve the process STATE column sorting
+* Reworked handling resize and redrawing of the UI
+* Fixed an issue where the LED meter mode could overflow allotted space
+* Allow text mode Meters to span empty neighbors to the right
+* Rescale graph meters when value of total changes
+  (thanks to Michael Schönitzer)
+* Update generic process field display
+  Usually "uninteresting" values in columns like 1 thread, nice value
+  of 0, CPU and memory of 0%, idle/sleeping state, etc. are shown with
+  reduced intensity (dark grey)
+* Option and key ("*") to collapse / expand all branches under PID 1
+  (and PID 2 if kernel threads are shown) (thanks to Krishna Chaitanya)
+* Keep following a process when inverting the sort order, displaying
+  the help screen or hiding/unhiding userland threads.
+  If a thread is currently selected the selection is updated to point
+  to the thread's parent process. (thanks to Gonzalo, et.al.)
+* Reorder process scanning to be performed before updating the display
+  of the meters in the header
+* Always check the user for a process for any changes.
+  This affects multiple platforms that previously didn't correctly handle
+  the user field for a process to change at runtime (e.g. due to seteuid
+  or similar syscalls).
+* Disable mouse option when support is unavailable
+* Support curses libraries without ncurses mouse support
+  (thanks to Santhosh Raju)
+* Support offline and hot-swapping of CPUs on all platforms
+* Fix the CPU Meter for machines with more than 256 CPUs
+* Supplemented the "show updated/deleted executables" feature (red basename)
+  to indicate when linked libraries were updated (yellow basename)
+* Apply the stale binary highlighting for the EXE column in addition to
+  the command line field
+* Add new combined Memory and Swap meter
+* Implement bar and graph mode for NetworkIO Meter
+  (thanks to Michael F. Schönitzer)
+* Rework TTY column to be more consistent across platforms
+* Make the CWD column generally available on all platforms
+  (thanks to Santhosh Raju et. al.)
+* Add Performance Co-Pilot (PCP) platform support
+  This is added via a separate pcp-htop(1) binary which provides remote host
+  analysis, new Meters for any PCP metric and new Columns for any PCP process
+  metric - see the pcp-htop(5) man page for further details.
+  (thanks to Sohaib Mohamed)
+* Add Linux columns and key bindings for process autogroup identifier
+  and nice value
+* Change available and used memory reporting on Linux to be based on
+  MemAvailable (Kernel 3.14+) (thanks to Chris Cheney and Tomas Wido)
+* Add a new SysArchMeter showing kernel and platform information
+  (thanks to ahgamut)
+* Linux memory usage explicitly treats tmpfs memory usage as shared memory
+  This is to make memory used by tmpfs visible as this cannot be freed
+  unlike normal filesystem cache data.
+* Exclude zram devices when calculating DiskIO on Linux
+* Use PATH lookup for systemctl in systemd meter (thanks to Scott Olson)
+* Add native platform support for NetBSD
+  This allows htop to run on NetBSD without the need for active Linux
+  emulation of the procfs filesystem.
+  (thanks to Santhosh Raju and Nia Alarie)
+* Add NetworkIO, DiskIO, CPU frequency, and battery meter support on NetBSD
+  (thanks to Nia Alarie)
+* Fix NetBSD display of in-use and cached memory (thanks to Nia Alarie)
+* Rework NetBSD CPU and memory accounting (thanks to Santhosh Raju)
+* Fix NetBSD accounting of user and kernel threads (thanks to Santhosh Raju)
+* Initial work to allow building with default libcurses on NetBSD
+  (thanks to Santhosh Raju)
+* FreeBSD updates - implement process majflt and processor column values
+* Add FreeBSD support for CPU frequency and temperature
+* Fixes and cleanups for ZFS Meters and metrics
+* Correctly color the ZFS ARC ratio (thanks to Ross Williams)
+* Bugfixes related to CPU time display/calculations for darwin on M1 systems
+  (thanks to Alexander Momchilov)
+* Harmonize the handling of multiple batteries across different platforms.
+  The system is now considered to run on AC if at least one power supply
+  marked as AC is found in the system.
+  Battery capacity is summed up over all batteries found.
+  This also changes the old behavior that batteries reported by the
+  system after the first AC adapter where sometimes ignored.
+* Correctly handle multiple batteries on Darwin.
+  Resolves a possible memory leak on systems with multiple batteries.
+* Handle Linux Shmem being part of Cached in the MemoryMeter
+* Add SwapCached to the Linux swap meter (thanks to David Zarzycki)
+* Convert process time to days if applicable (thanks to David Zarzycki)
+* Always show the number of threads in the TaskMeter, even when threads
+  are not shown in the process list
+* Fix Linux --drop-capabilities option handling
+* Correctly detect failure to initialize Linux boottime
+* Overhaul the Linux memory fields to partition them like free(1) now does
+* Improve the Linux process I/O column values
+* Rework the libsensors parsing on Linux
+* Update the MemoryMeter to display shared memory
+* Update OpenBSD platform - implement additional columns, scan LWP,
+  proper markup for STATE, show CPU frequency
+* Fix the tree view on OpenBSD when hiding kernel threads
+* Remove old InfoScreen lines before re-scanning (thanks to Øystein Hiåsen)
+* Document historic naming of Light-Weight Processes column aka threads
+* Improve user interaction when the last process entry is selected
+* Draw the panel header on the TraceScreen (thanks to Youngjae Lee)
+* Add mouse wheel scroll and fix mouse selection on the InfoScreen
+  (thanks to Youngjae Lee)
+* Add a HugepageMeter and subtract hugepages from normal memory
+* Display wide characters in LED meters and restore non-wide ncurses support
+* Add command line option to drop Linux capabilities
+* Support scheduler affinity on platforms beyond Linux
+* Report on any failure to write the configuration file
+* Cache stderr to be able to print assert messages.
+  These messages are shown in case htop terminates unexpectedly.
+* Print current settings on crash
+* Reset signal handlers on program exit
+* Add configure script option to create a static htop binary
+* Resolved longer-standing compilation issues on Solaris/Illumos
+* Check for availability of set_escdelay in configure
+  (thanks to Stefan Polluks)
+* Build system updates for autotools 2.70
+
+What's new in version 3.0.5
+
+* BUGFIX / SECURITY: InfoScreen: fix uncontrolled format string
+* BUGFIX: Improve white text in the Light Terminal colour scheme
+  (both of the above thanks to V)
+* Enable the function bar on the main screen to be hidden (see Setup -> Display options)
+* BUGFIX: Reduce layout issues esp. around printing wide characters (not complete yet)
+* BUGFIX: Make the follow function exit cleanly after followed process died
+* Solaris: make Process callbacks static
+* Update help and man page for improved -t / -s options
+* Drop usage of formatted error messages from <err.h>
+* Show arrow indicating order of sorted process column
+* Lots of plumbing around the internal Hashtable, hardening and code cleanups
+* LibSensors: add support for Ryzen CPUs
+  (thanks to Matej Dian)
+* BUGFIX: Fix CPU percentage on M1 silicon Macs
+  (thanks to Luke Groeninger)
+* LoadMeter: dynamically adjust color and total of bar
+* Find libsensors.so.4 for Fedora and friends
+* Add support to display CPU frequencies on Solarish platforms
+  (thanks to Dominik Hassler)
+* Enable going back to previous search matches (Shift-F3)
+* Added keybind 'N' for sorting by PID (drops 'n'/'N' as not used before much)
+  (thanks to Jake Mannens)
+
 What's new in version 3.0.4
 
 * Separate tree and list sort orders

ClockMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - ClockMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -10,21 +10,24 @@ in the source distribution for its full text.
 #include "ClockMeter.h"
 
 #include <time.h>
+#include <sys/time.h>
 
 #include "CRT.h"
 #include "Object.h"
+#include "ProcessList.h"
 
 
 static const int ClockMeter_attributes[] = {
    CLOCK
 };
 
-static void ClockMeter_updateValues(Meter* this, char* buffer, size_t size) {
-   time_t t = time(NULL);
+static void ClockMeter_updateValues(Meter* this) {
+   const ProcessList* pl = this->pl;
+
    struct tm result;
-   struct tm* lt = localtime_r(&t, &result);
+   const struct tm* lt = localtime_r(&pl->realtime.tv_sec, &result);
    this->values[0] = lt->tm_hour * 60 + lt->tm_min;
-   strftime(buffer, size, "%H:%M:%S", lt);
+   strftime(this->txtBuffer, sizeof(this->txtBuffer), "%H:%M:%S", lt);
 }
 
 const MeterClass ClockMeter_class = {

ClockMeter.h

@@ -3,12 +3,13 @@
 /*
 htop - ClockMeter.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "Meter.h"
 
+
 extern const MeterClass ClockMeter_class;
 
 #endif

ColorsPanel.c

@@ -1,23 +1,22 @@
 /*
 htop - ColorsPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "ColorsPanel.h"
 
+#include <assert.h>
 #include <stdbool.h>
 #include <stdlib.h>
 
 #include "CRT.h"
 #include "FunctionBar.h"
-#include "Header.h"
+#include "Macros.h"
 #include "Object.h"
 #include "OptionItem.h"
 #include "ProvideCurses.h"
-#include "RichString.h"
-#include "Vector.h"
 
 
 // TO ADD A NEW SCHEME:
@@ -51,7 +50,7 @@ static HandlerResult ColorsPanel_eventHandler(Panel* super, int ch) {
    ColorsPanel* this = (ColorsPanel*) super;
 
    HandlerResult result = IGNORED;
-   int mark = Panel_getSelectedIndex(super);
+   int mark;
 
    switch (ch) {
    case 0x0a:
@@ -60,6 +59,7 @@ static HandlerResult ColorsPanel_eventHandler(Panel* super, int ch) {
    case KEY_MOUSE:
    case KEY_RECLICK:
    case ' ':
+      mark = Panel_getSelectedIndex(super);
       assert(mark >= 0);
       assert(mark < LAST_COLORSCHEME);
       for (int i = 0; ColorSchemeNames[i] != NULL; i++)
@@ -68,6 +68,7 @@ static HandlerResult ColorsPanel_eventHandler(Panel* super, int ch) {
 
       this->settings->colorScheme = mark;
       this->settings->changed = true;
+      this->settings->lastUpdate++;
 
       CRT_setColors(mark);
       clear();
@@ -86,14 +87,13 @@ const PanelClass ColorsPanel_class = {
    .eventHandler = ColorsPanel_eventHandler
 };
 
-ColorsPanel* ColorsPanel_new(Settings* settings, ScreenManager* scr) {
+ColorsPanel* ColorsPanel_new(Settings* settings) {
    ColorsPanel* this = AllocThis(ColorsPanel);
    Panel* super = (Panel*) this;
    FunctionBar* fuBar = FunctionBar_new(ColorsFunctions, NULL, NULL);
    Panel_init(super, 1, 1, 1, 1, Class(CheckItem), true, fuBar);
 
    this->settings = settings;
-   this->scr = scr;
 
    assert(ARRAYSIZE(ColorSchemeNames) == LAST_COLORSCHEME + 1);
 

ColorsPanel.h

@@ -3,23 +3,22 @@
 /*
 htop - ColorsPanel.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "Panel.h"
-#include "ScreenManager.h"
 #include "Settings.h"
 
+
 typedef struct ColorsPanel_ {
    Panel super;
 
    Settings* settings;
-   ScreenManager* scr;
 } ColorsPanel;
 
 extern const PanelClass ColorsPanel_class;
 
-ColorsPanel* ColorsPanel_new(Settings* settings, ScreenManager* scr);
+ColorsPanel* ColorsPanel_new(Settings* settings);
 
 #endif

ColumnsPanel.c

@@ -1,17 +1,20 @@
 /*
 htop - ColumnsPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "ColumnsPanel.h"
 
+#include <assert.h>
 #include <ctype.h>
 #include <stdlib.h>
 
 #include "CRT.h"
+#include "DynamicColumn.h"
 #include "FunctionBar.h"
+#include "Hashtable.h"
 #include "ListItem.h"
 #include "Object.h"
 #include "Process.h"
@@ -115,35 +118,61 @@ const PanelClass ColumnsPanel_class = {
    .eventHandler = ColumnsPanel_eventHandler
 };
 
-ColumnsPanel* ColumnsPanel_new(Settings* settings) {
+static void ColumnsPanel_add(Panel* super, unsigned int key, Hashtable* columns) {
+   const char* name;
+   if (key < LAST_PROCESSFIELD) {
+      name = Process_fields[key].name;
+   } else {
+      const DynamicColumn* column = Hashtable_get(columns, key);
+      assert(column);
+      if (!column) {
+         name = NULL;
+      } else {
+         name = column->caption ? column->caption : column->heading;
+         if (!name)
+            name = column->name; /* name is a mandatory field */
+      }
+   }
+   if (name == NULL)
+      name = "- ";
+   Panel_add(super, (Object*) ListItem_new(name, key));
+}
+
+void ColumnsPanel_fill(ColumnsPanel* this, ScreenSettings* ss, Hashtable* columns) {
+   Panel* super = (Panel*) this;
+   Panel_prune(super);
+   for (const ProcessField* fields = ss->fields; *fields; fields++)
+      ColumnsPanel_add(super, *fields, columns);
+   this->ss = ss;
+}
+
+ColumnsPanel* ColumnsPanel_new(ScreenSettings* ss, Hashtable* columns, bool* changed) {
    ColumnsPanel* this = AllocThis(ColumnsPanel);
    Panel* super = (Panel*) this;
    FunctionBar* fuBar = FunctionBar_new(ColumnsFunctions, NULL, NULL);
    Panel_init(super, 1, 1, 1, 1, Class(ListItem), true, fuBar);
 
-   this->settings = settings;
+   this->ss = ss;
+   this->changed = changed;
    this->moving = false;
    Panel_setHeader(super, "Active Columns");
 
-   ProcessField* fields = this->settings->fields;
-   for (; *fields; fields++) {
-      if (Process_fields[*fields].name) {
-         Panel_add(super, (Object*) ListItem_new(Process_fields[*fields].name, *fields));
-      }
-   }
+   ColumnsPanel_fill(this, ss, columns);
+
    return this;
 }
 
 void ColumnsPanel_update(Panel* super) {
    ColumnsPanel* this = (ColumnsPanel*) super;
    int size = Panel_size(super);
-   this->settings->changed = true;
-   this->settings->fields = xRealloc(this->settings->fields, sizeof(ProcessField) * (size + 1));
-   this->settings->flags = 0;
+   *(this->changed) = true;
+   this->ss->fields = xRealloc(this->ss->fields, sizeof(ProcessField) * (size + 1));
+   this->ss->flags = 0;
    for (int i = 0; i < size; i++) {
       int key = ((ListItem*) Panel_get(super, i))->key;
-      this->settings->fields[i] = key;
-      this->settings->flags |= Process_fields[key].flags;
+      this->ss->fields[i] = key;
+      if (key < LAST_PROCESSFIELD)
+         this->ss->flags |= Process_fields[key].flags;
    }
-   this->settings->fields[size] = 0;
+   this->ss->fields[size] = 0;
 }

ColumnsPanel.h

@@ -3,7 +3,7 @@
 /*
 htop - ColumnsPanel.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -12,16 +12,20 @@ in the source distribution for its full text.
 #include "Panel.h"
 #include "Settings.h"
 
+
 typedef struct ColumnsPanel_ {
    Panel super;
+   ScreenSettings* ss;
+   bool* changed;
 
-   Settings* settings;
    bool moving;
 } ColumnsPanel;
 
 extern const PanelClass ColumnsPanel_class;
 
-ColumnsPanel* ColumnsPanel_new(Settings* settings);
+ColumnsPanel* ColumnsPanel_new(ScreenSettings* ss, Hashtable* columns, bool* changed);
+
+void ColumnsPanel_fill(ColumnsPanel* this, ScreenSettings* ss, Hashtable* columns);
 
 void ColumnsPanel_update(Panel* super);
 

CommandLine.c

@@ -0,0 +1,409 @@
+/*
+htop - CommandLine.c
+(C) 2004-2011 Hisham H. Muhammad
+(C) 2020-2021 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "config.h" // IWYU pragma: keep
+
+#include "CommandLine.h"
+
+#include <assert.h>
+#include <ctype.h>
+#include <getopt.h>
+#include <locale.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "Action.h"
+#include "CRT.h"
+#include "DynamicColumn.h"
+#include "DynamicMeter.h"
+#include "Hashtable.h"
+#include "Header.h"
+#include "IncSet.h"
+#include "MainPanel.h"
+#include "MetersPanel.h"
+#include "Panel.h"
+#include "Platform.h"
+#include "Process.h"
+#include "ProcessList.h"
+#include "ProvideCurses.h"
+#include "ScreenManager.h"
+#include "Settings.h"
+#include "UsersTable.h"
+#include "XUtils.h"
+
+
+static void printVersionFlag(const char* name) {
+   printf("%s " VERSION "\n", name);
+}
+
+static void printHelpFlag(const char* name) {
+   printf("%s " VERSION "\n"
+          COPYRIGHT "\n"
+          "Released under the GNU GPLv2+.\n\n"
+          "-C --no-color                   Use a monochrome color scheme\n"
+          "-d --delay=DELAY                Set the delay between updates, in tenths of seconds\n"
+          "-F --filter=FILTER              Show only the commands matching the given filter\n"
+          "-h --help                       Print this help screen\n"
+          "-H --highlight-changes[=DELAY]  Highlight new and old processes\n", name);
+#ifdef HAVE_GETMOUSE
+   printf("-M --no-mouse                   Disable the mouse\n");
+#endif
+   printf("-p --pid=PID[,PID,PID...]       Show only the given PIDs\n"
+          "   --readonly                   Disable all system and process changing features\n"
+          "-s --sort-key=COLUMN            Sort by COLUMN in list view (try --sort-key=help for a list)\n"
+          "-t --tree                       Show the tree view (can be combined with -s)\n"
+          "-u --user[=USERNAME]            Show only processes for a given user (or $USER)\n"
+          "-U --no-unicode                 Do not use unicode but plain ASCII\n"
+          "-V --version                    Print version info\n");
+   Platform_longOptionsUsage(name);
+   printf("\n"
+          "Long options may be passed with a single dash.\n\n"
+          "Press F1 inside %s for online help.\n"
+          "See 'man %s' for more information.\n", name, name);
+}
+
+// ----------------------------------------
+
+typedef struct CommandLineSettings_ {
+   Hashtable* pidMatchList;
+   char* commFilter;
+   uid_t userId;
+   int sortKey;
+   int delay;
+   bool useColors;
+   bool enableMouse;
+   bool treeView;
+   bool allowUnicode;
+   bool highlightChanges;
+   int highlightDelaySecs;
+   bool readonly;
+} CommandLineSettings;
+
+static CommandLineStatus parseArguments(const char* program, int argc, char** argv, CommandLineSettings* flags) {
+
+   *flags = (CommandLineSettings) {
+      .pidMatchList = NULL,
+      .commFilter = NULL,
+      .userId = (uid_t)-1, // -1 is guaranteed to be an invalid uid_t (see setreuid(2))
+      .sortKey = 0,
+      .delay = -1,
+      .useColors = true,
+      .enableMouse = true,
+      .treeView = false,
+      .allowUnicode = true,
+      .highlightChanges = false,
+      .highlightDelaySecs = -1,
+      .readonly = false,
+   };
+
+   const struct option long_opts[] =
+   {
+      {"help",       no_argument,         0, 'h'},
+      {"version",    no_argument,         0, 'V'},
+      {"delay",      required_argument,   0, 'd'},
+      {"sort-key",   required_argument,   0, 's'},
+      {"user",       optional_argument,   0, 'u'},
+      {"no-color",   no_argument,         0, 'C'},
+      {"no-colour",  no_argument,         0, 'C'},
+      {"no-mouse",   no_argument,         0, 'M'},
+      {"no-unicode", no_argument,         0, 'U'},
+      {"tree",       no_argument,         0, 't'},
+      {"pid",        required_argument,   0, 'p'},
+      {"filter",     required_argument,   0, 'F'},
+      {"highlight-changes", optional_argument, 0, 'H'},
+      {"readonly",   no_argument,         0, 128},
+      PLATFORM_LONG_OPTIONS
+      {0, 0, 0, 0}
+   };
+
+   int opt, opti = 0;
+   /* Parse arguments */
+   while ((opt = getopt_long(argc, argv, "hVMCs:td:u::Up:F:H::", long_opts, &opti))) {
+      if (opt == EOF)
+         break;
+      switch (opt) {
+         case 'h':
+            printHelpFlag(program);
+            return STATUS_OK_EXIT;
+         case 'V':
+            printVersionFlag(program);
+            return STATUS_OK_EXIT;
+         case 's':
+            assert(optarg); /* please clang analyzer, cause optarg can be NULL in the 'u' case */
+            if (String_eq(optarg, "help")) {
+               for (int j = 1; j < LAST_PROCESSFIELD; j++) {
+                  const char* name = Process_fields[j].name;
+                  const char* description = Process_fields[j].description;
+                  if (name) printf("%19s %s\n", name, description);
+               }
+               return STATUS_OK_EXIT;
+            }
+            flags->sortKey = 0;
+            for (int j = 1; j < LAST_PROCESSFIELD; j++) {
+               if (Process_fields[j].name == NULL)
+                  continue;
+               if (String_eq(optarg, Process_fields[j].name)) {
+                  flags->sortKey = j;
+                  break;
+               }
+            }
+            if (flags->sortKey == 0) {
+               fprintf(stderr, "Error: invalid column \"%s\".\n", optarg);
+               return STATUS_ERROR_EXIT;
+            }
+            break;
+         case 'd':
+            if (sscanf(optarg, "%16d", &(flags->delay)) == 1) {
+               if (flags->delay < 1) flags->delay = 1;
+               if (flags->delay > 100) flags->delay = 100;
+            } else {
+               fprintf(stderr, "Error: invalid delay value \"%s\".\n", optarg);
+               return STATUS_ERROR_EXIT;
+            }
+            break;
+         case 'u':
+         {
+            const char *username = optarg;
+            if (!username && optind < argc && argv[optind] != NULL &&
+                (argv[optind][0] != '\0' && argv[optind][0] != '-')) {
+               username = argv[optind++];
+            }
+
+            if (!username) {
+               flags->userId = geteuid();
+            } else if (!Action_setUserOnly(username, &(flags->userId))) {
+               for (const char *itr = username; *itr; ++itr)
+                  if (!isdigit((unsigned char)*itr)) {
+                     fprintf(stderr, "Error: invalid user \"%s\".\n", username);
+                     return STATUS_ERROR_EXIT;
+                  }
+               flags->userId = atol(username);
+            }
+            break;
+         }
+         case 'C':
+            flags->useColors = false;
+            break;
+         case 'M':
+#ifdef HAVE_GETMOUSE
+            flags->enableMouse = false;
+#endif
+            break;
+         case 'U':
+            flags->allowUnicode = false;
+            break;
+         case 't':
+            flags->treeView = true;
+            break;
+         case 'p': {
+            assert(optarg); /* please clang analyzer, cause optarg can be NULL in the 'u' case */
+            char* argCopy = xStrdup(optarg);
+            char* saveptr;
+            const char* pid = strtok_r(argCopy, ",", &saveptr);
+
+            if (!flags->pidMatchList) {
+               flags->pidMatchList = Hashtable_new(8, false);
+            }
+
+            while(pid) {
+                unsigned int num_pid = atoi(pid);
+                //  deepcode ignore CastIntegerToAddress: we just want a non-NULL pointer here
+                Hashtable_put(flags->pidMatchList, num_pid, (void *) 1);
+                pid = strtok_r(NULL, ",", &saveptr);
+            }
+            free(argCopy);
+
+            break;
+         }
+         case 'F': {
+            assert(optarg);
+            free_and_xStrdup(&flags->commFilter, optarg);
+            break;
+         }
+         case 'H': {
+            const char *delay = optarg;
+            if (!delay && optind < argc && argv[optind] != NULL &&
+                (argv[optind][0] != '\0' && argv[optind][0] != '-')) {
+                delay = argv[optind++];
+            }
+            if (delay) {
+                if (sscanf(delay, "%16d", &(flags->highlightDelaySecs)) == 1) {
+                   if (flags->highlightDelaySecs < 1)
+                      flags->highlightDelaySecs = 1;
+                } else {
+                   fprintf(stderr, "Error: invalid highlight delay value \"%s\".\n", delay);
+                   return STATUS_ERROR_EXIT;
+                }
+            }
+            flags->highlightChanges = true;
+            break;
+         }
+         case 128:
+            flags->readonly = true;
+            break;
+
+         default: {
+            CommandLineStatus status;
+            if ((status = Platform_getLongOption(opt, argc, argv)) != STATUS_OK)
+               return status;
+            break;
+         }
+      }
+   }
+   return STATUS_OK;
+}
+
+static void CommandLine_delay(ProcessList* pl, unsigned long millisec) {
+   struct timespec req = {
+      .tv_sec = 0,
+      .tv_nsec = millisec * 1000000L
+   };
+   while (nanosleep(&req, &req) == -1)
+      continue;
+   Platform_gettime_realtime(&pl->realtime, &pl->realtimeMs);
+}
+
+static void setCommFilter(State* state, char** commFilter) {
+   ProcessList* pl = state->pl;
+   IncSet* inc = state->mainPanel->inc;
+
+   IncSet_setFilter(inc, *commFilter);
+   pl->incFilter = IncSet_filter(inc);
+
+   free(*commFilter);
+   *commFilter = NULL;
+}
+
+int CommandLine_run(const char* name, int argc, char** argv) {
+
+   /* initialize locale */
+   const char* lc_ctype;
+   if ((lc_ctype = getenv("LC_CTYPE")) || (lc_ctype = getenv("LC_ALL")))
+      setlocale(LC_CTYPE, lc_ctype);
+   else
+      setlocale(LC_CTYPE, "");
+
+   CommandLineStatus status = STATUS_OK;
+   CommandLineSettings flags = { 0 };
+
+   if ((status = parseArguments(name, argc, argv, &flags)) != STATUS_OK)
+      return status != STATUS_OK_EXIT ? 1 : 0;
+
+   if (flags.readonly)
+      Settings_enableReadonly();
+
+   if (!Platform_init())
+      return 1;
+
+   Process_setupColumnWidths();
+
+   UsersTable* ut = UsersTable_new();
+   Hashtable* dc = DynamicColumns_new();
+   Hashtable* dm = DynamicMeters_new();
+   if (!dc)
+      dc = Hashtable_new(0, true);
+
+   ProcessList* pl = ProcessList_new(ut, dm, dc, flags.pidMatchList, flags.userId);
+
+   Settings* settings = Settings_new(pl->activeCPUs, dc);
+   pl->settings = settings;
+
+   Header* header = Header_new(pl, settings, 2);
+
+   Header_populateFromSettings(header);
+
+   if (flags.delay != -1)
+      settings->delay = flags.delay;
+   if (!flags.useColors)
+      settings->colorScheme = COLORSCHEME_MONOCHROME;
+#ifdef HAVE_GETMOUSE
+   if (!flags.enableMouse)
+      settings->enableMouse = false;
+#endif
+   if (flags.treeView)
+      settings->ss->treeView = true;
+   if (flags.highlightChanges)
+      settings->highlightChanges = true;
+   if (flags.highlightDelaySecs != -1)
+      settings->highlightDelaySecs = flags.highlightDelaySecs;
+   if (flags.sortKey > 0) {
+      // -t -s <key> means "tree sorted by key"
+      // -s <key> means "list sorted by key" (previous existing behavior)
+      if (!flags.treeView) {
+         settings->ss->treeView = false;
+      }
+      ScreenSettings_setSortKey(settings->ss, flags.sortKey);
+   }
+
+   CRT_init(settings, flags.allowUnicode);
+
+   MainPanel* panel = MainPanel_new();
+   ProcessList_setPanel(pl, (Panel*) panel);
+
+   MainPanel_updateLabels(panel, settings->ss->treeView, flags.commFilter);
+
+   State state = {
+      .settings = settings,
+      .ut = ut,
+      .pl = pl,
+      .mainPanel = panel,
+      .header = header,
+      .pauseProcessUpdate = false,
+      .hideProcessSelection = false,
+   };
+
+   MainPanel_setState(panel, &state);
+   if (flags.commFilter)
+      setCommFilter(&state, &(flags.commFilter));
+
+   ScreenManager* scr = ScreenManager_new(header, settings, &state, true);
+   ScreenManager_add(scr, (Panel*) panel, -1);
+
+   ProcessList_scan(pl, false);
+   CommandLine_delay(pl, 75);
+   ProcessList_scan(pl, false);
+
+   if (settings->ss->allBranchesCollapsed)
+      ProcessList_collapseAllBranches(pl);
+
+   ScreenManager_run(scr, NULL, NULL, NULL);
+
+   Platform_done();
+
+   CRT_done();
+
+   if (settings->changed) {
+      int r = Settings_write(settings, false);
+      if (r < 0)
+         fprintf(stderr, "Can not save configuration to %s: %s\n", settings->filename, strerror(-r));
+   }
+
+   Header_delete(header);
+   ProcessList_delete(pl);
+
+   ScreenManager_delete(scr);
+   MetersPanel_cleanup();
+
+   UsersTable_delete(ut);
+
+   if (flags.pidMatchList)
+      Hashtable_delete(flags.pidMatchList);
+
+   CRT_resetSignalHandlers();
+
+   /* Delete these last, since they can get accessed in the crash handler */
+   Settings_delete(settings);
+   DynamicColumns_delete(dc);
+   DynamicMeters_delete(dm);
+
+   return 0;
+}

CommandLine.h

@@ -0,0 +1,19 @@
+#ifndef HEADER_CommandLine
+#define HEADER_CommandLine
+/*
+htop - CommandLine.h
+(C) 2004-2011 Hisham H. Muhammad
+(C) 2020-2021 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+typedef enum {
+   STATUS_OK,
+   STATUS_ERROR_EXIT,
+   STATUS_OK_EXIT
+} CommandLineStatus;
+
+int CommandLine_run(const char* name, int argc, char** argv);
+
+#endif

CommandScreen.c

@@ -2,13 +2,13 @@
 
 #include "CommandScreen.h"
 
+#include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "Macros.h"
 #include "Panel.h"
 #include "ProvideCurses.h"
-#include "XUtils.h"
 
 
 static void CommandScreen_scan(InfoScreen* this) {
@@ -60,7 +60,7 @@ const InfoScreenClass CommandScreen_class = {
 
 CommandScreen* CommandScreen_new(Process* process) {
    CommandScreen* this = AllocThis(CommandScreen);
-   return (CommandScreen*) InfoScreen_init(&this->super, process, NULL, LINES - 3, " ");
+   return (CommandScreen*) InfoScreen_init(&this->super, process, NULL, LINES - 2, " ");
 }
 
 void CommandScreen_delete(Object* this) {

Compat.c

@@ -1,7 +1,7 @@
 /*
 htop - Compat.c
 (C) 2020 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -11,18 +11,12 @@ in the source distribution for its full text.
 
 #include <errno.h>
 #include <fcntl.h> // IWYU pragma: keep
-#include <time.h>
 #include <unistd.h>
 #include <sys/stat.h>
 #include <sys/types.h> // IWYU pragma: keep
 
 #include "XUtils.h" // IWYU pragma: keep
 
-#ifdef HAVE_HOST_GET_CLOCK_SERVICE
-#include <mach/clock.h>
-#include <mach/mach.h>
-#endif
-
 
 int Compat_faccessat(int dirfd,
                      const char* pathname,
@@ -43,7 +37,7 @@ int Compat_faccessat(int dirfd,
 #endif
 
    // Error out on unsupported configurations
-   if (dirfd != AT_FDCWD || mode != F_OK) {
+   if (dirfd != (int)AT_FDCWD || mode != F_OK) {
       errno = EINVAL;
       return -1;
    }
@@ -123,31 +117,3 @@ ssize_t Compat_readlinkat(int dirfd,
 
 #endif
 }
-
-int Compat_clock_monotonic_gettime(struct timespec *tp) {
-
-#if defined(HAVE_CLOCK_GETTIME)
-
-   return clock_gettime(CLOCK_MONOTONIC, tp);
-
-#elif defined(HAVE_HOST_GET_CLOCK_SERVICE)
-
-   clock_serv_t cclock;
-   mach_timespec_t mts;
-
-   host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
-   clock_get_time(cclock, &mts);
-   mach_port_deallocate(mach_task_self(), cclock);
-
-   tp->tv_sec = mts.tv_sec;
-   tp->tv_nsec = mts.tv_nsec;
-
-   return 0;
-
-#else
-
-#error No Compat_clock_monotonic_gettime() implementation!
-
-#endif
-
-}

Compat.h

@@ -3,7 +3,7 @@
 /*
 htop - Compat.h
 (C) 2020 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -56,6 +56,4 @@ ssize_t Compat_readlinkat(int dirfd,
                           char* buf,
                           size_t bufsize);
 
-int Compat_clock_monotonic_gettime(struct timespec *tp);
-
 #endif /* HEADER_Compat */

DateMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - DateMeter.c
 (C) 2004-2020 Hisham H. Muhammad, Michael Schönitzer
-Released under the GNU GPL, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -10,28 +10,30 @@ in the source distribution for its full text.
 #include "DateMeter.h"
 
 #include <time.h>
+#include <sys/time.h>
 
 #include "CRT.h"
 #include "Object.h"
+#include "ProcessList.h"
 
 
 static const int DateMeter_attributes[] = {
    DATE
 };
 
-static void DateMeter_updateValues(Meter* this, char* buffer, size_t size) {
-   time_t t = time(NULL);
+static void DateMeter_updateValues(Meter* this) {
+   const ProcessList* pl = this->pl;
+
    struct tm result;
-   struct tm* lt = localtime_r(&t, &result);
+   const struct tm* lt = localtime_r(&pl->realtime.tv_sec, &result);
    this->values[0] = lt->tm_yday;
    int year = lt->tm_year + 1900;
    if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) {
       this->total = 366;
-   }
-   else {
+   } else {
       this->total = 365;
    }
-   strftime(buffer, size, "%F", lt);
+   strftime(this->txtBuffer, sizeof(this->txtBuffer), "%F", lt);
 }
 
 const MeterClass DateMeter_class = {

DateMeter.h

@@ -3,12 +3,13 @@
 /*
 htop - DateMeter.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPL, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "Meter.h"
 
+
 extern const MeterClass DateMeter_class;
 
 #endif

DateTimeMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - DateTimeMeter.c
 (C) 2004-2020 Hisham H. Muhammad, Michael Schönitzer
-Released under the GNU GPL, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -10,28 +10,30 @@ in the source distribution for its full text.
 #include "DateTimeMeter.h"
 
 #include <time.h>
+#include <sys/time.h>
 
 #include "CRT.h"
 #include "Object.h"
+#include "ProcessList.h"
 
 
 static const int DateTimeMeter_attributes[] = {
    DATETIME
 };
 
-static void DateTimeMeter_updateValues(Meter* this, char* buffer, size_t size) {
-   time_t t = time(NULL);
+static void DateTimeMeter_updateValues(Meter* this) {
+   const ProcessList* pl = this->pl;
+
    struct tm result;
-   struct tm* lt = localtime_r(&t, &result);
+   const struct tm* lt = localtime_r(&pl->realtime.tv_sec, &result);
    int year = lt->tm_year + 1900;
    if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) {
       this->total = 366;
-   }
-   else {
+   } else {
       this->total = 365;
    }
    this->values[0] = lt->tm_yday;
-   strftime(buffer, size, "%F %H:%M:%S", lt);
+   strftime(this->txtBuffer, sizeof(this->txtBuffer), "%F %H:%M:%S", lt);
 }
 
 const MeterClass DateTimeMeter_class = {

DateTimeMeter.h

@@ -3,12 +3,13 @@
 /*
 htop - DateTimeMeter.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPL, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "Meter.h"
 
+
 extern const MeterClass DateTimeMeter_class;
 
 #endif

DiskIOMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - DiskIOMeter.c
 (C) 2020 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -9,12 +9,13 @@ in the source distribution for its full text.
 
 #include <stdbool.h>
 #include <stdio.h>
-#include <sys/time.h>
 
 #include "CRT.h"
 #include "Macros.h"
+#include "Meter.h"
 #include "Object.h"
 #include "Platform.h"
+#include "ProcessList.h"
 #include "RichString.h"
 #include "XUtils.h"
 
@@ -25,78 +26,108 @@ static const int DiskIOMeter_attributes[] = {
    METER_VALUE_IOWRITE,
 };
 
-static bool hasData = false;
-static unsigned long int cached_read_diff = 0;
-static unsigned long int cached_write_diff = 0;
-static double cached_utilisation_diff = 0.0;
+static MeterRateStatus status = RATESTATUS_INIT;
+static uint32_t cached_read_diff;
+static uint32_t cached_write_diff;
+static double cached_utilisation_diff;
 
-static void DiskIOMeter_updateValues(Meter* this, char* buffer, size_t len) {
-   static unsigned long long int cached_last_update = 0;
+static void DiskIOMeter_updateValues(Meter* this) {
+   const ProcessList* pl = this->pl;
 
-   struct timeval tv;
-   gettimeofday(&tv, NULL);
-   unsigned long long int timeInMilliSeconds = (unsigned long long int)tv.tv_sec * 1000 + (unsigned long long int)tv.tv_usec / 1000;
-   unsigned long long int passedTimeInMs = timeInMilliSeconds - cached_last_update;
+   static uint64_t cached_last_update;
+   uint64_t passedTimeInMs = pl->realtimeMs - cached_last_update;
 
-   /* update only every 500ms */
+   /* update only every 500ms to have a sane span for rate calculation */
    if (passedTimeInMs > 500) {
-      static unsigned long int cached_read_total = 0;
-      static unsigned long int cached_write_total = 0;
-      static unsigned long int cached_msTimeSpend_total = 0;
-
-      cached_last_update = timeInMilliSeconds;
+      static uint64_t cached_read_total;
+      static uint64_t cached_write_total;
+      static uint64_t cached_msTimeSpend_total;
+      uint64_t diff;
 
       DiskIOData data;
+      if (!Platform_getDiskIO(&data)) {
+         status = RATESTATUS_NODATA;
+      } else if (cached_last_update == 0) {
+         status = RATESTATUS_INIT;
+      } else if (passedTimeInMs > 30000) {
+         status = RATESTATUS_STALE;
+      } else {
+         status = RATESTATUS_DATA;
+      }
 
-      hasData = Platform_getDiskIO(&data);
-      if (!hasData) {
-         this->values[0] = 0;
-         xSnprintf(buffer, len, "no data");
+      cached_last_update = pl->realtimeMs;
+
+      if (status == RATESTATUS_NODATA) {
+         xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "no data");
          return;
       }
 
       if (data.totalBytesRead > cached_read_total) {
-         cached_read_diff = (data.totalBytesRead - cached_read_total) / 1024; /* Meter_humanUnit() expects unit in kilo */
+         diff = data.totalBytesRead - cached_read_total;
+         diff /= 1024; /* Meter_humanUnit() expects unit in kilo */
+         cached_read_diff = (uint32_t)diff;
       } else {
          cached_read_diff = 0;
       }
       cached_read_total = data.totalBytesRead;
 
       if (data.totalBytesWritten > cached_write_total) {
-         cached_write_diff = (data.totalBytesWritten - cached_write_total) / 1024; /* Meter_humanUnit() expects unit in kilo */
+         diff = data.totalBytesWritten - cached_write_total;
+         diff /= 1024; /* Meter_humanUnit() expects unit in kilo */
+         cached_write_diff = (uint32_t)diff;
       } else {
          cached_write_diff = 0;
       }
       cached_write_total = data.totalBytesWritten;
 
       if (data.totalMsTimeSpend > cached_msTimeSpend_total) {
-         cached_utilisation_diff = 100 * (double)(data.totalMsTimeSpend - cached_msTimeSpend_total) / passedTimeInMs;
+         diff = data.totalMsTimeSpend - cached_msTimeSpend_total;
+         cached_utilisation_diff = 100.0 * (double)diff / passedTimeInMs;
       } else {
          cached_utilisation_diff = 0.0;
       }
       cached_msTimeSpend_total = data.totalMsTimeSpend;
    }
 
+   if (status == RATESTATUS_INIT) {
+      xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "init");
+      return;
+   }
+   if (status == RATESTATUS_STALE) {
+      xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "stale");
+      return;
+   }
+
    this->values[0] = cached_utilisation_diff;
    this->total = MAXIMUM(this->values[0], 100.0); /* fix total after (initial) spike */
 
    char bufferRead[12], bufferWrite[12];
    Meter_humanUnit(bufferRead, cached_read_diff, sizeof(bufferRead));
    Meter_humanUnit(bufferWrite, cached_write_diff, sizeof(bufferWrite));
-   snprintf(buffer, len, "%sB %sB %.1f%%", bufferRead, bufferWrite, cached_utilisation_diff);
+   snprintf(this->txtBuffer, sizeof(this->txtBuffer), "%sB %sB %.1f%%", bufferRead, bufferWrite, cached_utilisation_diff);
 }
 
-static void DIskIOMeter_display(ATTR_UNUSED const Object* cast, RichString* out) {
-   if (!hasData) {
+static void DiskIOMeter_display(ATTR_UNUSED const Object* cast, RichString* out) {
+   switch (status) {
+   case RATESTATUS_NODATA:
       RichString_writeAscii(out, CRT_colors[METER_VALUE_ERROR], "no data");
       return;
+   case RATESTATUS_INIT:
+      RichString_writeAscii(out, CRT_colors[METER_VALUE], "initializing...");
+      return;
+   case RATESTATUS_STALE:
+      RichString_writeAscii(out, CRT_colors[METER_VALUE_WARN], "stale data");
+      return;
+   case RATESTATUS_DATA:
+      break;
    }
 
    char buffer[16];
+   int len;
 
    int color = cached_utilisation_diff > 40.0 ? METER_VALUE_NOTICE : METER_VALUE;
-   xSnprintf(buffer, sizeof(buffer), "%.1f%%", cached_utilisation_diff);
-   RichString_writeAscii(out, CRT_colors[color], buffer);
+   len = xSnprintf(buffer, sizeof(buffer), "%.1f%%", cached_utilisation_diff);
+   RichString_appendnAscii(out, CRT_colors[color], buffer, len);
 
    RichString_appendAscii(out, CRT_colors[METER_TEXT], " read: ");
    Meter_humanUnit(buffer, cached_read_diff, sizeof(buffer));
@@ -111,7 +142,7 @@ const MeterClass DiskIOMeter_class = {
    .super = {
       .extends = Class(Meter),
       .delete = Meter_delete,
-      .display = DIskIOMeter_display
+      .display = DiskIOMeter_display
    },
    .updateValues = DiskIOMeter_updateValues,
    .defaultMode = TEXT_METERMODE,

DiskIOMeter.h

@@ -3,16 +3,17 @@
 /*
 htop - DiskIOMeter.h
 (C) 2020 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "Meter.h"
 
+
 typedef struct DiskIOData_ {
-   unsigned long int totalBytesRead;
-   unsigned long int totalBytesWritten;
-   unsigned long int totalMsTimeSpend;
+   uint64_t totalBytesRead;
+   uint64_t totalBytesWritten;
+   uint64_t totalMsTimeSpend;
 } DiskIOData;
 
 extern const MeterClass DiskIOMeter_class;

DisplayOptionsPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - DisplayOptionsPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -18,6 +18,7 @@ in the source distribution for its full text.
 #include "Object.h"
 #include "OptionItem.h"
 #include "ProvideCurses.h"
+#include "ScreensPanel.h"
 
 
 static const char* const DisplayOptionsFunctions[] = {"      ", "      ", "      ", "      ", "      ", "      ", "      ", "      ", "      ", "Done  ", NULL};
@@ -43,6 +44,8 @@ static HandlerResult DisplayOptionsPanel_eventHandler(Panel* super, int ch) {
    case KEY_RECLICK:
    case ' ':
       switch (OptionItem_kind(selected)) {
+      case OPTION_ITEM_TEXT:
+         break;
       case OPTION_ITEM_CHECK:
          CheckItem_toggle((CheckItem*)selected);
          result = HANDLED;
@@ -69,11 +72,13 @@ static HandlerResult DisplayOptionsPanel_eventHandler(Panel* super, int ch) {
 
    if (result == HANDLED) {
       this->settings->changed = true;
+      this->settings->lastUpdate++;
       Header* header = this->scr->header;
       Header_calculateHeight(header);
       Header_reinit(header);
+      Header_updateData(header);
       Header_draw(header);
-      ScreenManager_resize(this->scr, this->scr->x1, header->height, this->scr->x2, this->scr->y2);
+      ScreenManager_resize(this->scr);
    }
    return result;
 }
@@ -96,8 +101,18 @@ DisplayOptionsPanel* DisplayOptionsPanel_new(Settings* settings, ScreenManager*
    this->scr = scr;
 
    Panel_setHeader(super, "Display options");
-   Panel_add(super, (Object*) CheckItem_newByRef("Tree view", &(settings->treeView)));
-   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is always sorted by PID (htop 2 behavior)", &(settings->treeViewAlwaysByPID)));
+
+   #define TABMSG "For current screen tab: \0"
+   char tabheader[sizeof(TABMSG) + SCREEN_NAME_LEN + 1] = TABMSG;
+   strncat(tabheader, settings->ss->name, SCREEN_NAME_LEN);
+   Panel_add(super, (Object*) TextItem_new(tabheader));
+   #undef TABMSG
+
+   Panel_add(super, (Object*) CheckItem_newByRef("Tree view", &(settings->ss->treeView)));
+   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is always sorted by PID (htop 2 behavior)", &(settings->ss->treeViewAlwaysByPID)));
+   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is collapsed by default", &(settings->ss->allBranchesCollapsed)));
+   Panel_add(super, (Object*) TextItem_new("Global options:"));
+   Panel_add(super, (Object*) CheckItem_newByRef("Show tabs for screens", &(settings->screenTabs)));
    Panel_add(super, (Object*) CheckItem_newByRef("Shadow other users' processes", &(settings->shadowOtherUsers)));
    Panel_add(super, (Object*) CheckItem_newByRef("Hide kernel threads", &(settings->hideKernelThreads)));
    Panel_add(super, (Object*) CheckItem_newByRef("Hide userland process threads", &(settings->hideUserlandThreads)));
@@ -105,6 +120,7 @@ DisplayOptionsPanel* DisplayOptionsPanel_new(Settings* settings, ScreenManager*
    Panel_add(super, (Object*) CheckItem_newByRef("Show custom thread names", &(settings->showThreadNames)));
    Panel_add(super, (Object*) CheckItem_newByRef("Show program path", &(settings->showProgramPath)));
    Panel_add(super, (Object*) CheckItem_newByRef("Highlight program \"basename\"", &(settings->highlightBaseName)));
+   Panel_add(super, (Object*) CheckItem_newByRef("Highlight out-dated/removed programs (red) / libraries (yellow)", &(settings->highlightDeletedExe)));
    Panel_add(super, (Object*) CheckItem_newByRef("Merge exe, comm and cmdline in Command", &(settings->showMergedCommand)));
    Panel_add(super, (Object*) CheckItem_newByRef("- Try to find comm in cmdline (when Command is merged)", &(settings->findCommInCmdline)));
    Panel_add(super, (Object*) CheckItem_newByRef("- Try to strip exe from cmdline (when Command is merged)", &(settings->stripExeFromCmdline)));
@@ -116,14 +132,25 @@ DisplayOptionsPanel* DisplayOptionsPanel_new(Settings* settings, ScreenManager*
    Panel_add(super, (Object*) CheckItem_newByRef("Add guest time in CPU meter percentage", &(settings->accountGuestInCPUMeter)));
    Panel_add(super, (Object*) CheckItem_newByRef("Also show CPU percentage numerically", &(settings->showCPUUsage)));
    Panel_add(super, (Object*) CheckItem_newByRef("Also show CPU frequency", &(settings->showCPUFrequency)));
-   #ifdef HAVE_SENSORS_SENSORS_H
-   Panel_add(super, (Object*) CheckItem_newByRef("Also show CPU temperature (requires libsensors)", &(settings->showCPUTemperature)));
+   #ifdef BUILD_WITH_CPU_TEMP
+   Panel_add(super, (Object*) CheckItem_newByRef(
+   #if defined(HTOP_LINUX)
+                                                 "Also show CPU temperature (requires libsensors)",
+   #elif defined(HTOP_FREEBSD)
+                                                 "Also show CPU temperature",
+   #else
+   #error Unknown temperature implementation!
+   #endif
+                                                 &(settings->showCPUTemperature)));
    Panel_add(super, (Object*) CheckItem_newByRef("- Show temperature in degree Fahrenheit instead of Celsius", &(settings->degreeFahrenheit)));
    #endif
+   #ifdef HAVE_GETMOUSE
    Panel_add(super, (Object*) CheckItem_newByRef("Enable the mouse", &(settings->enableMouse)));
+   #endif
    Panel_add(super, (Object*) NumberItem_newByRef("Update interval (in seconds)", &(settings->delay), -1, 1, 255));
    Panel_add(super, (Object*) CheckItem_newByRef("Highlight new and old processes", &(settings->highlightChanges)));
    Panel_add(super, (Object*) NumberItem_newByRef("- Highlight time (in seconds)", &(settings->highlightDelaySecs), 0, 1, 24 * 60 * 60));
+   Panel_add(super, (Object*) NumberItem_newByRef("Hide main function bar (0 - off, 1 - on ESC until next input, 2 - permanently)", &(settings->hideFunctionBar), 0, 0, 2));
    #ifdef HAVE_LIBHWLOC
    Panel_add(super, (Object*) CheckItem_newByRef("Show topology when selecting affinity by default", &(settings->topologyAffinity)));
    #endif

DisplayOptionsPanel.h

@@ -3,7 +3,7 @@
 /*
 htop - DisplayOptionsPanel.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -11,6 +11,7 @@ in the source distribution for its full text.
 #include "ScreenManager.h"
 #include "Settings.h"
 
+
 typedef struct DisplayOptionsPanel_ {
    Panel super;
 

DynamicColumn.c

@@ -0,0 +1,66 @@
+/*
+htop - DynamicColumn.c
+(C) 2021 Sohaib Mohammed
+(C) 2021 htop dev team
+(C) 2021 Red Hat, Inc.  All Rights Reserved.
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "config.h" // IWYU pragma: keep
+
+#include "DynamicColumn.h"
+
+#include <stddef.h>
+
+#include "Platform.h"
+#include "RichString.h"
+#include "XUtils.h"
+
+
+Hashtable* DynamicColumns_new(void) {
+   return Platform_dynamicColumns();
+}
+
+void DynamicColumns_delete(Hashtable* dynamics) {
+   if (dynamics) {
+      Platform_dynamicColumnsDone(dynamics);
+      Hashtable_delete(dynamics);
+   }
+}
+
+const char* DynamicColumn_init(unsigned int key) {
+   return Platform_dynamicColumnInit(key);
+}
+
+typedef struct {
+   const char* name;
+   const DynamicColumn* data;
+   unsigned int key;
+} DynamicIterator;
+
+static void DynamicColumn_compare(ht_key_t key, void* value, void* data) {
+   const DynamicColumn* column = (const DynamicColumn*)value;
+   DynamicIterator* iter = (DynamicIterator*)data;
+   if (String_eq(iter->name, column->name)) {
+      iter->data = column;
+      iter->key = key;
+   }
+}
+
+const DynamicColumn* DynamicColumn_search(Hashtable* dynamics, const char* name, unsigned int* key) {
+   DynamicIterator iter = { .key = 0, .data = NULL, .name = name };
+   if (dynamics)
+      Hashtable_foreach(dynamics, DynamicColumn_compare, &iter);
+   if (key)
+      *key = iter.key;
+   return iter.data;
+}
+
+const DynamicColumn* DynamicColumn_lookup(Hashtable* dynamics, unsigned int key) {
+   return (const DynamicColumn*) Hashtable_get(dynamics, key);
+}
+
+bool DynamicColumn_writeField(const Process* proc, RichString* str, unsigned int key) {
+   return Platform_dynamicColumnWriteField(proc, str, key);
+}

DynamicColumn.h

@@ -0,0 +1,34 @@
+#ifndef HEADER_DynamicColumn
+#define HEADER_DynamicColumn
+
+#include <stdbool.h>
+
+#include "Hashtable.h"
+#include "Process.h"
+#include "RichString.h"
+
+
+#define DYNAMIC_MAX_COLUMN_WIDTH 28
+#define DYNAMIC_DEFAULT_COLUMN_WIDTH -5
+
+typedef struct DynamicColumn_ {
+   char name[32];     /* unique, internal-only name */
+   char* heading;     /* displayed in main screen */
+   char* caption;     /* displayed in setup menu (short name) */
+   char* description; /* displayed in setup menu (detail) */
+   int width;         /* display width +/- for value alignment */
+} DynamicColumn;
+
+Hashtable* DynamicColumns_new(void);
+
+void DynamicColumns_delete(Hashtable* dynamics);
+
+const char* DynamicColumn_init(unsigned int key);
+
+const DynamicColumn* DynamicColumn_lookup(Hashtable* dynamics, unsigned int key);
+
+const DynamicColumn* DynamicColumn_search(Hashtable* dynamics, const char* name, unsigned int* key);
+
+bool DynamicColumn_writeField(const Process* proc, RichString* str, unsigned int key);
+
+#endif

DynamicMeter.c

@@ -0,0 +1,131 @@
+/*
+htop - DynamicMeter.c
+(C) 2021 htop dev team
+(C) 2021 Red Hat, Inc.  All Rights Reserved.
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "config.h" // IWYU pragma: keep
+
+#include "DynamicMeter.h"
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <string.h>
+
+#include "CRT.h"
+#include "Object.h"
+#include "Platform.h"
+#include "ProcessList.h"
+#include "RichString.h"
+#include "XUtils.h"
+
+
+static const int DynamicMeter_attributes[] = {
+   DYNAMIC_GRAY,
+   DYNAMIC_DARKGRAY,
+   DYNAMIC_RED,
+   DYNAMIC_GREEN,
+   DYNAMIC_BLUE,
+   DYNAMIC_CYAN,
+   DYNAMIC_MAGENTA,
+   DYNAMIC_YELLOW,
+   DYNAMIC_WHITE
+};
+
+Hashtable* DynamicMeters_new(void) {
+   return Platform_dynamicMeters();
+}
+
+void DynamicMeters_delete(Hashtable* dynamics) {
+   if (dynamics) {
+      Platform_dynamicMetersDone(dynamics);
+      Hashtable_delete(dynamics);
+   }
+}
+
+typedef struct {
+   unsigned int key;
+   const char* name;
+   bool found;
+} DynamicIterator;
+
+static void DynamicMeter_compare(ht_key_t key, void* value, void* data) {
+   const DynamicMeter* meter = (const DynamicMeter*)value;
+   DynamicIterator* iter = (DynamicIterator*)data;
+   if (String_eq(iter->name, meter->name)) {
+      iter->found = true;
+      iter->key = key;
+   }
+}
+
+bool DynamicMeter_search(Hashtable* dynamics, const char* name, unsigned int* key) {
+   DynamicIterator iter = { .key = 0, .name = name, .found = false };
+   if (dynamics)
+      Hashtable_foreach(dynamics, DynamicMeter_compare, &iter);
+   if (key)
+      *key = iter.key;
+   return iter.found;
+}
+
+const char* DynamicMeter_lookup(Hashtable* dynamics, unsigned int key) {
+   const DynamicMeter* meter = Hashtable_get(dynamics, key);
+   return meter ? meter->name : NULL;
+}
+
+static void DynamicMeter_init(Meter* meter) {
+   Platform_dynamicMeterInit(meter);
+}
+
+static void DynamicMeter_updateValues(Meter* meter) {
+   Platform_dynamicMeterUpdateValues(meter);
+}
+
+static void DynamicMeter_display(const Object* cast, RichString* out) {
+   const Meter* meter = (const Meter*)cast;
+   Platform_dynamicMeterDisplay(meter, out);
+}
+
+static const char* DynamicMeter_getCaption(const Meter* this) {
+   const ProcessList* pl = this->pl;
+   const DynamicMeter* meter = Hashtable_get(pl->dynamicMeters, this->param);
+   if (meter)
+      return meter->caption ? meter->caption : meter->name;
+   return this->caption;
+}
+
+static void DynamicMeter_getUiName(const Meter* this, char* name, size_t length) {
+   const ProcessList* pl = this->pl;
+   const DynamicMeter* meter = Hashtable_get(pl->dynamicMeters, this->param);
+   if (meter) {
+      const char* uiName = meter->caption;
+      if (uiName) {
+         int len = strlen(uiName);
+         if (len > 2 && uiName[len - 2] == ':')
+            len -= 2;
+         xSnprintf(name, length, "%.*s", len, uiName);
+      } else {
+         xSnprintf(name, length, "%s", meter->name);
+      }
+   }
+}
+
+const MeterClass DynamicMeter_class = {
+   .super = {
+      .extends = Class(Meter),
+      .delete = Meter_delete,
+      .display = DynamicMeter_display
+   },
+   .init = DynamicMeter_init,
+   .updateValues = DynamicMeter_updateValues,
+   .getCaption = DynamicMeter_getCaption,
+   .getUiName = DynamicMeter_getUiName,
+   .defaultMode = TEXT_METERMODE,
+   .maxItems = 0,
+   .total = 100.0,
+   .attributes = DynamicMeter_attributes,
+   .name = "Dynamic",
+   .uiName = "Dynamic",
+   .caption = "",
+};

DynamicMeter.h

@@ -0,0 +1,28 @@
+#ifndef HEADER_DynamicMeter
+#define HEADER_DynamicMeter
+
+#include <stdbool.h>
+
+#include "Hashtable.h"
+#include "Meter.h"
+
+
+typedef struct DynamicMeter_ {
+   char name[32];  /* unique name, cannot contain spaces */
+   char* caption;
+   char* description;
+   unsigned int type;
+   double maximum;
+} DynamicMeter;
+
+Hashtable* DynamicMeters_new(void);
+
+void DynamicMeters_delete(Hashtable* dynamics);
+
+const char* DynamicMeter_lookup(Hashtable* dynamics, unsigned int key);
+
+bool DynamicMeter_search(Hashtable* dynamics, const char* name, unsigned int* key);
+
+extern const MeterClass DynamicMeter_class;
+
+#endif

EnvScreen.c

@@ -5,7 +5,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "CRT.h"
 #include "Macros.h"
 #include "Panel.h"
 #include "Platform.h"
@@ -17,7 +16,7 @@
 EnvScreen* EnvScreen_new(Process* process) {
    EnvScreen* this = xMalloc(sizeof(EnvScreen));
    Object_setClass(this, Class(EnvScreen));
-   return (EnvScreen*) InfoScreen_init(&this->super, process, NULL, LINES - 3, " ");
+   return (EnvScreen*) InfoScreen_init(&this->super, process, NULL, LINES - 2, " ");
 }
 
 void EnvScreen_delete(Object* this) {
@@ -34,11 +33,9 @@ static void EnvScreen_scan(InfoScreen* this) {
 
    Panel_prune(panel);
 
-   CRT_dropPrivileges();
    char* env = Platform_getProcessEnv(this->process->pid);
-   CRT_restorePrivileges();
    if (env) {
-      for (char* p = env; *p; p = strrchr(p, 0) + 1)
+      for (const char* p = env; *p; p = strrchr(p, 0) + 1)
          InfoScreen_addLine(this, p);
       free(env);
    }

EnvScreen.h

@@ -5,6 +5,7 @@
 #include "Object.h"
 #include "Process.h"
 
+
 typedef struct EnvScreen_ {
    InfoScreen super;
 } EnvScreen;

FreqMeter.c

@@ -0,0 +1,29 @@
+#include "FreqMeter.h"
+
+#include "CRT.h"
+#include "Object.h"
+#include "Platform.h"
+#include "XUtils.h"
+
+static const int FreqMeter_attributes[] = {
+    FREQ};
+
+static void FreqMeter_updateValues(Meter *this)
+{
+   float freq = Platform_getFreq();
+
+   xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "%.1lf GHz", freq);
+}
+
+const MeterClass FreqMeter_class = {
+    .super = {
+        .extends = Class(Meter),
+        .delete = Meter_delete},
+    .updateValues = FreqMeter_updateValues,
+    .defaultMode = TEXT_METERMODE,
+    .maxItems = 1,
+    .total = 100.0,
+    .attributes = FreqMeter_attributes,
+    .name = "Freq",
+    .uiName = "CPU Frequency",
+    .caption = "CPU/Frequency: "};

FreqMeter.h

@@ -0,0 +1,8 @@
+#ifndef HEADER_FreqMeter
+#define HEADER_FreqMeter
+
+#include "Meter.h"
+
+extern const MeterClass FreqMeter_class;
+
+#endif

FunctionBar.c

@@ -1,7 +1,7 @@
 /*
 htop - FunctionBar.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -88,11 +88,12 @@ void FunctionBar_setLabel(FunctionBar* this, int event, const char* text) {
    }
 }
 
-void FunctionBar_draw(const FunctionBar* this) {
-   FunctionBar_drawExtra(this, NULL, -1, false);
+int FunctionBar_draw(const FunctionBar* this) {
+   return FunctionBar_drawExtra(this, NULL, -1, false);
 }
 
-void FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor) {
+int FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor) {
+   int cursorX = 0;
    attrset(CRT_colors[FUNCTION_BAR]);
    mvhline(LINES - 1, 0, ' ', COLS);
    int x = 0;
@@ -113,18 +114,20 @@ void FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr
       }
       mvaddstr(LINES - 1, x, buffer);
       x += strlen(buffer);
+      cursorX = x;
    }
 
    attrset(CRT_colors[RESET_COLOR]);
 
    if (setCursor) {
-      CRT_cursorX = x;
       curs_set(1);
    } else {
       curs_set(0);
    }
 
    currentLen = x;
+
+   return cursorX;
 }
 
 void FunctionBar_append(const char* buffer, int attr) {

FunctionBar.h

@@ -3,12 +3,13 @@
 /*
 htop - FunctionBar.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include <stdbool.h>
 
+
 typedef struct FunctionBar_ {
    int size;
    char** functions;
@@ -28,9 +29,9 @@ void FunctionBar_delete(FunctionBar* this);
 
 void FunctionBar_setLabel(FunctionBar* this, int event, const char* text);
 
-void FunctionBar_draw(const FunctionBar* this);
+int FunctionBar_draw(const FunctionBar* this);
 
-void FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor);
+int FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor);
 
 void FunctionBar_append(const char* buffer, int attr);
 

Hashtable.c

@@ -1,7 +1,7 @@
 /*
 htop - Hashtable.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -11,44 +11,62 @@ in the source distribution for its full text.
 
 #include <assert.h>
 #include <stdint.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+#include "CRT.h"
 #include "Macros.h"
 #include "XUtils.h"
 
+#ifndef NDEBUG
+#include <stdio.h>
+#endif
+
+
+typedef struct HashtableItem_ {
+   ht_key_t key;
+   size_t probe;
+   void* value;
+} HashtableItem;
+
+struct Hashtable_ {
+   size_t size;
+   HashtableItem* buckets;
+   size_t items;
+   bool owner;
+};
+
 
 #ifndef NDEBUG
 
 static void Hashtable_dump(const Hashtable* this) {
-   fprintf(stderr, "Hashtable %p: size=%u items=%u owner=%s\n",
+   fprintf(stderr, "Hashtable %p: size=%zu items=%zu owner=%s\n",
            (const void*)this,
            this->size,
            this->items,
            this->owner ? "yes" : "no");
 
-   unsigned int items = 0;
-   for (unsigned int i = 0; i < this->size; i++) {
-      fprintf(stderr, "  item %5u: key = %5u probe = %2u value = %p\n",
+   size_t items = 0;
+   for (size_t i = 0; i < this->size; i++) {
+      fprintf(stderr, "  item %5zu: key = %5u probe = %2zu value = %p\n",
               i,
               this->buckets[i].key,
               this->buckets[i].probe,
-              this->buckets[i].value ? (const void*)this->buckets[i].value : "(nil)");
+              this->buckets[i].value);
 
       if (this->buckets[i].value)
          items++;
    }
 
-   fprintf(stderr, "Hashtable %p: items=%u counted=%u\n",
+   fprintf(stderr, "Hashtable %p: items=%zu counted=%zu\n",
            (const void*)this,
            this->items,
            items);
 }
 
 static bool Hashtable_isConsistent(const Hashtable* this) {
-   unsigned int items = 0;
-   for (unsigned int i = 0; i < this->size; i++) {
+   size_t items = 0;
+   for (size_t i = 0; i < this->size; i++) {
       if (this->buckets[i].value)
          items++;
    }
@@ -58,9 +76,9 @@ static bool Hashtable_isConsistent(const Hashtable* this) {
    return res;
 }
 
-unsigned int Hashtable_count(const Hashtable* this) {
-   unsigned int items = 0;
-   for (unsigned int i = 0; i < this->size; i++) {
+size_t Hashtable_count(const Hashtable* this) {
+   size_t items = 0;
+   for (size_t i = 0; i < this->size; i++) {
       if (this->buckets[i].value)
          items++;
    }
@@ -72,7 +90,7 @@ unsigned int Hashtable_count(const Hashtable* this) {
 
 /* https://oeis.org/A014234 */
 static const uint64_t OEISprimes[] = {
-   2, 3, 7, 13, 31, 61, 127, 251, 509, 1021, 2039, 4093, 8191,
+   7, 13, 31, 61, 127, 251, 509, 1021, 2039, 4093, 8191,
    16381, 32749, 65521, 131071, 262139, 524287, 1048573,
    2097143, 4194301, 8388593, 16777213, 33554393,
    67108859, 134217689, 268435399, 536870909, 1073741789,
@@ -80,18 +98,17 @@ static const uint64_t OEISprimes[] = {
    34359738337, 68719476731, 137438953447
 };
 
-static uint64_t nextPrime(unsigned int n) {
-   assert(n <= OEISprimes[ARRAYSIZE(OEISprimes) - 1]);
-
-   for (unsigned int i = 0; i < ARRAYSIZE(OEISprimes); i++) {
+static size_t nextPrime(size_t n) {
+   /* on 32-bit make sure we do not return primes not fitting in size_t */
+   for (size_t i = 0; i < ARRAYSIZE(OEISprimes) && OEISprimes[i] < SIZE_MAX; i++) {
       if (n <= OEISprimes[i])
          return OEISprimes[i];
    }
 
-   return OEISprimes[ARRAYSIZE(OEISprimes) - 1];
+   CRT_fatalError("Hashtable: no prime found");
 }
 
-Hashtable* Hashtable_new(unsigned int size, bool owner) {
+Hashtable* Hashtable_new(size_t size, bool owner) {
    Hashtable* this;
 
    this = xMalloc(sizeof(Hashtable));
@@ -115,7 +132,7 @@ void Hashtable_clear(Hashtable* this) {
    assert(Hashtable_isConsistent(this));
 
    if (this->owner)
-      for (unsigned int i = 0; i < this->size; i++)
+      for (size_t i = 0; i < this->size; i++)
          free(this->buckets[i].value);
 
    memset(this->buckets, 0, this->size * sizeof(HashtableItem));
@@ -124,11 +141,11 @@ void Hashtable_clear(Hashtable* this) {
    assert(Hashtable_isConsistent(this));
 }
 
-static void insert(Hashtable* this, hkey_t key, void* value) {
-   unsigned int index = key % this->size;
-   unsigned int probe = 0;
+static void insert(Hashtable* this, ht_key_t key, void* value) {
+   size_t index = key % this->size;
+   size_t probe = 0;
 #ifndef NDEBUG
-   unsigned int origIndex = index;
+   size_t origIndex = index;
 #endif
 
    for (;;) {
@@ -167,22 +184,26 @@ static void insert(Hashtable* this, hkey_t key, void* value) {
    }
 }
 
-void Hashtable_setSize(Hashtable* this, unsigned int size) {
+void Hashtable_setSize(Hashtable* this, size_t size) {
 
    assert(Hashtable_isConsistent(this));
 
    if (size <= this->items)
       return;
 
-   HashtableItem* oldBuckets = this->buckets;
-   unsigned int oldSize = this->size;
+   size_t newSize = nextPrime(size);
+   if (newSize == this->size)
+      return;
 
-   this->size = nextPrime(size);
+   HashtableItem* oldBuckets = this->buckets;
+   size_t oldSize = this->size;
+
+   this->size = newSize;
    this->buckets = (HashtableItem*) xCalloc(this->size, sizeof(HashtableItem));
    this->items = 0;
 
    /* rehash */
-   for (unsigned int i = 0; i < oldSize; i++) {
+   for (size_t i = 0; i < oldSize; i++) {
       if (!oldBuckets[i].value)
          continue;
 
@@ -194,15 +215,19 @@ void Hashtable_setSize(Hashtable* this, unsigned int size) {
    assert(Hashtable_isConsistent(this));
 }
 
-void Hashtable_put(Hashtable* this, hkey_t key, void* value) {
+void Hashtable_put(Hashtable* this, ht_key_t key, void* value) {
 
    assert(Hashtable_isConsistent(this));
    assert(this->size > 0);
    assert(value);
 
    /* grow on load-factor > 0.7 */
-   if (10 * this->items > 7 * this->size)
+   if (10 * this->items > 7 * this->size) {
+      if (SIZE_MAX / 2 < this->size)
+         CRT_fatalError("Hashtable: size overflow");
+
       Hashtable_setSize(this, 2 * this->size);
+   }
 
    insert(this, key, value);
 
@@ -211,11 +236,11 @@ void Hashtable_put(Hashtable* this, hkey_t key, void* value) {
    assert(this->size > this->items);
 }
 
-void* Hashtable_remove(Hashtable* this, hkey_t key) {
-   unsigned int index = key % this->size;
-   unsigned int probe = 0;
+void* Hashtable_remove(Hashtable* this, ht_key_t key) {
+   size_t index = key % this->size;
+   size_t probe = 0;
 #ifndef NDEBUG
-   unsigned int origIndex = index;
+   size_t origIndex = index;
 #endif
 
    assert(Hashtable_isConsistent(this));
@@ -230,7 +255,7 @@ void* Hashtable_remove(Hashtable* this, hkey_t key) {
             res = this->buckets[index].value;
          }
 
-         unsigned int next = (index + 1) % this->size;
+         size_t next = (index + 1) % this->size;
 
          while (this->buckets[next].value && this->buckets[next].probe > 0) {
             this->buckets[index] = this->buckets[next];
@@ -261,17 +286,17 @@ void* Hashtable_remove(Hashtable* this, hkey_t key) {
 
    /* shrink on load-factor < 0.125 */
    if (8 * this->items < this->size)
-      Hashtable_setSize(this, this->size / 2);
+      Hashtable_setSize(this, this->size / 3); /* account for nextPrime rounding up */
 
    return res;
 }
 
-void* Hashtable_get(Hashtable* this, hkey_t key) {
-   unsigned int index = key % this->size;
-   unsigned int probe = 0;
+void* Hashtable_get(Hashtable* this, ht_key_t key) {
+   size_t index = key % this->size;
+   size_t probe = 0;
    void* res = NULL;
 #ifndef NDEBUG
-   unsigned int origIndex = index;
+   size_t origIndex = index;
 #endif
 
    assert(Hashtable_isConsistent(this));
@@ -296,7 +321,7 @@ void* Hashtable_get(Hashtable* this, hkey_t key) {
 
 void Hashtable_foreach(Hashtable* this, Hashtable_PairFunction f, void* userData) {
    assert(Hashtable_isConsistent(this));
-   for (unsigned int i = 0; i < this->size; i++) {
+   for (size_t i = 0; i < this->size; i++) {
       HashtableItem* walk = &this->buckets[i];
       if (walk->value)
          f(walk->key, walk->value, userData);

Hashtable.h

@@ -3,49 +3,39 @@
 /*
 htop - Hashtable.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include <stdbool.h>
+#include <stddef.h>
 
 
-typedef unsigned int hkey_t;
+typedef unsigned int ht_key_t;
 
-typedef void(*Hashtable_PairFunction)(hkey_t key, void* value, void* userdata);
+typedef void(*Hashtable_PairFunction)(ht_key_t key, void* value, void* userdata);
 
-typedef struct HashtableItem_ {
-   hkey_t key;
-   unsigned int probe;
-   void* value;
-} HashtableItem;
-
-typedef struct Hashtable_ {
-   unsigned int size;
-   HashtableItem* buckets;
-   unsigned int items;
-   bool owner;
-} Hashtable;
+typedef struct Hashtable_ Hashtable;
 
 #ifndef NDEBUG
 
-unsigned int Hashtable_count(const Hashtable* this);
+size_t Hashtable_count(const Hashtable* this);
 
 #endif /* NDEBUG */
 
-Hashtable* Hashtable_new(unsigned int size, bool owner);
+Hashtable* Hashtable_new(size_t size, bool owner);
 
 void Hashtable_delete(Hashtable* this);
 
 void Hashtable_clear(Hashtable* this);
 
-void Hashtable_setSize(Hashtable* this, unsigned int size);
+void Hashtable_setSize(Hashtable* this, size_t size);
 
-void Hashtable_put(Hashtable* this, hkey_t key, void* value);
+void Hashtable_put(Hashtable* this, ht_key_t key, void* value);
 
-void* Hashtable_remove(Hashtable* this, hkey_t key);
+void* Hashtable_remove(Hashtable* this, ht_key_t key);
 
-void* Hashtable_get(Hashtable* this, hkey_t key);
+void* Hashtable_get(Hashtable* this, ht_key_t key);
 
 void Hashtable_foreach(Hashtable* this, Hashtable_PairFunction f, void* userData);
 

Header.c

@@ -1,18 +1,23 @@
 /*
 htop - Header.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "Header.h"
 
+#include <assert.h>
+#include <math.h>
 #include <stdbool.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "CRT.h"
+#include "CPUMeter.h"
+#include "DynamicMeter.h"
 #include "Macros.h"
 #include "Object.h"
 #include "Platform.h"
@@ -20,15 +25,17 @@ in the source distribution for its full text.
 #include "XUtils.h"
 
 
-Header* Header_new(struct ProcessList_* pl, Settings* settings, int nrColumns) {
+Header* Header_new(ProcessList* pl, Settings* settings, HeaderLayout hLayout) {
    Header* this = xCalloc(1, sizeof(Header));
-   this->columns = xCalloc(nrColumns, sizeof(Vector*));
+   this->columns = xMallocArray(HeaderLayout_getColumns(hLayout), sizeof(Vector*));
    this->settings = settings;
    this->pl = pl;
-   this->nrColumns = nrColumns;
+   this->headerLayout = hLayout;
+
    Header_forEachColumn(this, i) {
       this->columns[i] = Vector_new(Class(Meter), true, DEFAULT_SIZE);
    }
+
    return this;
 }
 
@@ -36,42 +43,120 @@ void Header_delete(Header* this) {
    Header_forEachColumn(this, i) {
       Vector_delete(this->columns[i]);
    }
+
    free(this->columns);
    free(this);
 }
 
+void Header_setLayout(Header* this, HeaderLayout hLayout) {
+   size_t oldColumns = HeaderLayout_getColumns(this->headerLayout);
+   size_t newColumns = HeaderLayout_getColumns(hLayout);
+
+   this->headerLayout = hLayout;
+
+   if (newColumns == oldColumns)
+      return;
+
+   if (newColumns > oldColumns) {
+      this->columns = xReallocArray(this->columns, newColumns, sizeof(Vector*));
+      for (size_t i = oldColumns; i < newColumns; i++)
+         this->columns[i] = Vector_new(Class(Meter), true, DEFAULT_SIZE);
+   } else {
+      // move meters from to-be-deleted columns into last one
+      for (size_t i = newColumns; i < oldColumns; i++) {
+         for (int j = this->columns[i]->items - 1; j >= 0; j--) {
+            Vector_add(this->columns[newColumns - 1], Vector_take(this->columns[i], j));
+         }
+         Vector_delete(this->columns[i]);
+      }
+      this->columns = xReallocArray(this->columns, newColumns, sizeof(Vector*));
+   }
+
+   Header_calculateHeight(this);
+}
+
+static void Header_addMeterByName(Header* this, const char* name, MeterModeId mode, unsigned int column) {
+   assert(column < HeaderLayout_getColumns(this->headerLayout));
+
+   Vector* meters = this->columns[column];
+
+   const char* paren = strchr(name, '(');
+   unsigned int param = 0;
+   size_t nameLen;
+   if (paren) {
+      int ok = sscanf(paren, "(%10u)", &param); // CPUMeter
+      if (!ok) {
+         char dynamic[32] = {0};
+         if (sscanf(paren, "(%30s)", dynamic)) { // DynamicMeter
+            char* end;
+            if ((end = strrchr(dynamic, ')')) == NULL)
+               return;    // htoprc parse failure
+            *end = '\0';
+            if (!DynamicMeter_search(this->pl->dynamicMeters, dynamic, &param))
+               return;    // name lookup failure
+         } else {
+            param = 0;
+         }
+      }
+      nameLen = paren - name;
+   } else {
+      nameLen = strlen(name);
+   }
+
+   for (const MeterClass* const* type = Platform_meterTypes; *type; type++) {
+      if (0 == strncmp(name, (*type)->name, nameLen) && (*type)->name[nameLen] == '\0') {
+         Meter* meter = Meter_new(this->pl, param, *type);
+         if (mode != 0) {
+            Meter_setMode(meter, mode);
+         }
+         Vector_add(meters, meter);
+         break;
+      }
+   }
+}
+
 void Header_populateFromSettings(Header* this) {
+   Header_setLayout(this, this->settings->hLayout);
+
    Header_forEachColumn(this, col) {
-      MeterColumnSettings* colSettings = &this->settings->columns[col];
-      for (int i = 0; i < colSettings->len; i++) {
-         Header_addMeterByName(this, colSettings->names[i], col);
-         if (colSettings->modes[i] != 0) {
-            Header_setMode(this, i, colSettings->modes[i], col);
-         }
+      const MeterColumnSetting* colSettings = &this->settings->hColumns[col];
+      Vector_prune(this->columns[col]);
+      for (size_t i = 0; i < colSettings->len; i++) {
+         Header_addMeterByName(this, colSettings->names[i], colSettings->modes[i], col);
       }
    }
+
    Header_calculateHeight(this);
 }
 
 void Header_writeBackToSettings(const Header* this) {
-   Header_forEachColumn(this, col) {
-      MeterColumnSettings* colSettings = &this->settings->columns[col];
+   Settings_setHeaderLayout(this->settings, this->headerLayout);
 
-      String_freeArray(colSettings->names);
+   Header_forEachColumn(this, col) {
+      MeterColumnSetting* colSettings = &this->settings->hColumns[col];
+
+      if (colSettings->names) {
+         for (size_t j = 0; j < colSettings->len; j++)
+            free(colSettings->names[j]);
+         free(colSettings->names);
+      }
       free(colSettings->modes);
 
-      Vector* vec = this->columns[col];
+      const Vector* vec = this->columns[col];
       int len = Vector_size(vec);
 
-      colSettings->names = xCalloc(len + 1, sizeof(char*));
-      colSettings->modes = xCalloc(len, sizeof(int));
+      colSettings->names = len ? xCalloc(len + 1, sizeof(char*)) : NULL;
+      colSettings->modes = len ? xCalloc(len, sizeof(int)) : NULL;
       colSettings->len = len;
 
       for (int i = 0; i < len; i++) {
-         Meter* meter = (Meter*) Vector_get(vec, i);
+         const Meter* meter = (Meter*) Vector_get(vec, i);
          char* name;
-         if (meter->param) {
-            xAsprintf(&name, "%s(%d)", As_Meter(meter)->name, meter->param);
+         if (meter->param && As_Meter(meter) == &DynamicMeter_class) {
+            const char* dynamic = DynamicMeter_lookup(this->pl->dynamicMeters, meter->param);
+            xAsprintf(&name, "%s(%s)", As_Meter(meter)->name, dynamic);
+         } else if (meter->param && As_Meter(meter) == &CPUMeter_class) {
+            xAsprintf(&name, "%s(%u)", As_Meter(meter)->name, meter->param);
          } else {
             xAsprintf(&name, "%s", As_Meter(meter)->name);
          }
@@ -81,44 +166,9 @@ void Header_writeBackToSettings(const Header* this) {
    }
 }
 
-MeterModeId Header_addMeterByName(Header* this, char* name, int column) {
-   Vector* meters = this->columns[column];
+Meter* Header_addMeterByClass(Header* this, const MeterClass* type, unsigned int param, unsigned int column) {
+   assert(column < HeaderLayout_getColumns(this->headerLayout));
 
-   char* paren = strchr(name, '(');
-   int param = 0;
-   if (paren) {
-      int ok = sscanf(paren, "(%10d)", &param);
-      if (!ok)
-         param = 0;
-      *paren = '\0';
-   }
-   MeterModeId mode = TEXT_METERMODE;
-   for (const MeterClass* const* type = Platform_meterTypes; *type; type++) {
-      if (String_eq(name, (*type)->name)) {
-         Meter* meter = Meter_new(this->pl, param, *type);
-         Vector_add(meters, meter);
-         mode = meter->mode;
-         break;
-      }
-   }
-
-   if (paren)
-      *paren = '(';
-
-   return mode;
-}
-
-void Header_setMode(Header* this, int i, MeterModeId mode, int column) {
-   Vector* meters = this->columns[column];
-
-   if (i >= Vector_size(meters))
-      return;
-
-   Meter* meter = (Meter*) Vector_get(meters, i);
-   Meter_setMode(meter, mode);
-}
-
-Meter* Header_addMeterByClass(Header* this, const MeterClass* type, int param, int column) {
    Vector* meters = this->columns[column];
 
    Meter* meter = Meter_new(this->pl, param, type);
@@ -126,18 +176,6 @@ Meter* Header_addMeterByClass(Header* this, const MeterClass* type, int param, i
    return meter;
 }
 
-int Header_size(Header* this, int column) {
-   Vector* meters = this->columns[column];
-   return Vector_size(meters);
-}
-
-MeterModeId Header_readMeterMode(Header* this, int i, int column) {
-   Vector* meters = this->columns[column];
-
-   Meter* meter = (Meter*) Vector_get(meters, i);
-   return meter->mode;
-}
-
 void Header_reinit(Header* this) {
    Header_forEachColumn(this, col) {
       for (int i = 0; i < Vector_size(this->columns[col]); i++) {
@@ -150,39 +188,107 @@ void Header_reinit(Header* this) {
 }
 
 void Header_draw(const Header* this) {
-   int height = this->height;
-   int pad = this->pad;
+   const int height = this->height;
+   const int pad = this->pad;
    attrset(CRT_colors[RESET_COLOR]);
    for (int y = 0; y < height; y++) {
       mvhline(y, 0, ' ', COLS);
    }
-   int width = COLS / this->nrColumns - (pad * this->nrColumns - 1) - 1;
+   const int numCols = HeaderLayout_getColumns(this->headerLayout);
+   const int width = COLS - 2 * pad - (numCols - 1);
    int x = pad;
+   float roundingLoss = 0.0F;
 
    Header_forEachColumn(this, col) {
       Vector* meters = this->columns[col];
+      float colWidth = (float)width * HeaderLayout_layouts[this->headerLayout].widths[col] / 100.0F;
+
+      roundingLoss += colWidth - floorf(colWidth);
+      if (roundingLoss >= 1.0F) {
+         colWidth += 1.0F;
+         roundingLoss -= 1.0F;
+      }
+
       for (int y = (pad / 2), i = 0; i < Vector_size(meters); i++) {
          Meter* meter = (Meter*) Vector_get(meters, i);
-         meter->draw(meter, x, y, width);
+
+         float actualWidth = colWidth;
+
+         /* Let meters in text mode expand to the right on empty neighbors;
+            except for multi column meters. */
+         if (meter->mode == TEXT_METERMODE && !Meter_isMultiColumn(meter)) {
+            for (int j = 1; j < meter->columnWidthCount; j++) {
+               actualWidth++; /* separator column */
+               actualWidth += (float)width * HeaderLayout_layouts[this->headerLayout].widths[col + j] / 100.0F;
+            }
+         }
+
+         assert(meter->draw);
+         meter->draw(meter, x, y, floorf(actualWidth));
          y += meter->h;
       }
-      x += width + pad;
+
+      x += floorf(colWidth);
+      x++; /* separator column */
    }
 }
 
+void Header_updateData(Header* this) {
+   Header_forEachColumn(this, col) {
+      Vector* meters = this->columns[col];
+      int items = Vector_size(meters);
+      for (int i = 0; i < items; i++) {
+         Meter* meter = (Meter*) Vector_get(meters, i);
+         Meter_updateValues(meter);
+      }
+   }
+}
+
+/*
+ * Calculate how many columns the current meter is allowed to span,
+ * by counting how many columns to the right are empty or contain a BlankMeter.
+ * Returns the number of columns to span, i.e. if the direct neighbor is occupied 1.
+ */
+static int calcColumnWidthCount(const Header* this, const Meter* curMeter, const int pad, const unsigned int curColumn, const int curHeight) {
+   for (size_t i = curColumn + 1; i < HeaderLayout_getColumns(this->headerLayout); i++) {
+      const Vector* meters = this->columns[i];
+
+      int height = pad;
+      for (int j = 0; j < Vector_size(meters); j++) {
+         const Meter* meter = (const Meter*) Vector_get(meters, j);
+
+         if (height >= curHeight + curMeter->h)
+            break;
+
+         height += meter->h;
+         if (height <= curHeight)
+            continue;
+
+         if (!Object_isA((const Object*) meter, (const ObjectClass*) &BlankMeter_class))
+            return i - curColumn;
+      }
+   }
+
+   return HeaderLayout_getColumns(this->headerLayout) - curColumn;
+}
+
 int Header_calculateHeight(Header* this) {
-   int pad = this->settings->headerMargin ? 2 : 0;
+   const int pad = this->settings->headerMargin ? 2 : 0;
    int maxHeight = pad;
 
    Header_forEachColumn(this, col) {
-      Vector* meters = this->columns[col];
+      const Vector* meters = this->columns[col];
       int height = pad;
       for (int i = 0; i < Vector_size(meters); i++) {
          Meter* meter = (Meter*) Vector_get(meters, i);
+         meter->columnWidthCount = calcColumnWidthCount(this, meter, pad, col, height);
          height += meter->h;
       }
       maxHeight = MAXIMUM(maxHeight, height);
    }
+   if (this->settings->screenTabs) {
+      maxHeight++;
+   }
    this->height = maxHeight;
    this->pad = pad;
    return maxHeight;

Header.h

@@ -3,48 +3,46 @@
 /*
 htop - Header.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "HeaderLayout.h"
 #include "Meter.h"
 #include "ProcessList.h"
 #include "Settings.h"
 #include "Vector.h"
 
+
 typedef struct Header_ {
    Vector** columns;
    Settings* settings;
    ProcessList* pl;
-   int nrColumns;
+   HeaderLayout headerLayout;
    int pad;
    int height;
 } Header;
 
-#define Header_forEachColumn(this_, i_) for (int (i_)=0; (i_) < (this_)->nrColumns; ++(i_))
+#define Header_forEachColumn(this_, i_) for (size_t (i_)=0, H_fEC_numColumns_ = HeaderLayout_getColumns((this_)->headerLayout); (i_) < H_fEC_numColumns_; ++(i_))
 
-Header* Header_new(ProcessList* pl, Settings* settings, int nrColumns);
+Header* Header_new(ProcessList* pl, Settings* settings, HeaderLayout hLayout);
 
 void Header_delete(Header* this);
 
+void Header_setLayout(Header* this, HeaderLayout hLayout);
+
 void Header_populateFromSettings(Header* this);
 
 void Header_writeBackToSettings(const Header* this);
 
-MeterModeId Header_addMeterByName(Header* this, char* name, int column);
-
-void Header_setMode(Header* this, int i, MeterModeId mode, int column);
-
-Meter* Header_addMeterByClass(Header* this, const MeterClass* type, int param, int column);
-
-int Header_size(Header* this, int column);
-
-MeterModeId Header_readMeterMode(Header* this, int i, int column);
+Meter* Header_addMeterByClass(Header* this, const MeterClass* type, unsigned int param, unsigned int column);
 
 void Header_reinit(Header* this);
 
 void Header_draw(const Header* this);
 
+void Header_updateData(Header* this);
+
 int Header_calculateHeight(Header* this);
 
 #endif

HeaderLayout.h

@@ -0,0 +1,78 @@
+#ifndef HEADER_HeaderLayout
+#define HEADER_HeaderLayout
+/*
+htop - HeaderLayout.h
+(C) 2021 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "config.h" // IWYU pragma: keep
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "Macros.h"
+#include "XUtils.h"
+
+
+typedef enum HeaderLayout_ {
+   HF_INVALID = -1,
+   HF_TWO_50_50,
+   HF_TWO_33_67,
+   HF_TWO_67_33,
+   HF_THREE_33_34_33,
+   HF_THREE_25_25_50,
+   HF_THREE_25_50_25,
+   HF_THREE_50_25_25,
+   HF_THREE_40_20_40,
+   HF_FOUR_25_25_25_25,
+   LAST_HEADER_LAYOUT
+} HeaderLayout;
+
+static const struct {
+   uint8_t columns;
+   const uint8_t widths[4];
+   const char* name;
+   const char* description;
+} HeaderLayout_layouts[LAST_HEADER_LAYOUT] = {
+   [HF_TWO_50_50]        = { 2, { 50, 50,  0,  0 }, "two_50_50",        "2 columns - 50/50 (default)", },
+   [HF_TWO_33_67]        = { 2, { 33, 67,  0,  0 }, "two_33_67",        "2 columns - 33/67",           },
+   [HF_TWO_67_33]        = { 2, { 67, 33,  0,  0 }, "two_67_33",        "2 columns - 67/33",           },
+   [HF_THREE_33_34_33]   = { 3, { 33, 34, 33,  0 }, "three_33_34_33",   "3 columns - 33/34/33",        },
+   [HF_THREE_25_25_50]   = { 3, { 25, 25, 50,  0 }, "three_25_25_50",   "3 columns - 25/25/50",        },
+   [HF_THREE_25_50_25]   = { 3, { 25, 50, 25,  0 }, "three_25_50_25",   "3 columns - 25/50/25",        },
+   [HF_THREE_50_25_25]   = { 3, { 50, 25, 25,  0 }, "three_50_25_25",   "3 columns - 50/25/25",        },
+   [HF_THREE_40_20_40]   = { 3, { 40, 20, 40,  0 }, "three_40_20_40",   "3 columns - 40/20/40",        },
+   [HF_FOUR_25_25_25_25] = { 4, { 25, 25, 25, 25 }, "four_25_25_25_25", "4 columns - 25/25/25/25",     },
+};
+
+static inline size_t HeaderLayout_getColumns(HeaderLayout hLayout) {
+   /* assert the layout is initialized */
+   assert(0 <= hLayout);
+   assert(hLayout < LAST_HEADER_LAYOUT);
+   assert(HeaderLayout_layouts[hLayout].name[0]);
+   assert(HeaderLayout_layouts[hLayout].description[0]);
+   return HeaderLayout_layouts[hLayout].columns;
+}
+
+static inline const char* HeaderLayout_getName(HeaderLayout hLayout) {
+   /* assert the layout is initialized */
+   assert(0 <= hLayout);
+   assert(hLayout < LAST_HEADER_LAYOUT);
+   assert(HeaderLayout_layouts[hLayout].name[0]);
+   assert(HeaderLayout_layouts[hLayout].description[0]);
+   return HeaderLayout_layouts[hLayout].name;
+}
+
+static inline HeaderLayout HeaderLayout_fromName(const char* name) {
+   for (size_t i = 0; i < LAST_HEADER_LAYOUT; i++) {
+      if (String_eq(HeaderLayout_layouts[i].name, name))
+         return (HeaderLayout) i;
+   }
+
+   return LAST_HEADER_LAYOUT;
+}
+
+#endif /* HEADER_HeaderLayout */

HeaderOptionsPanel.c

@@ -0,0 +1,88 @@
+/*
+htop - HeaderOptionsPanel.c
+(C) 2021 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "HeaderOptionsPanel.h"
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include "CRT.h"
+#include "FunctionBar.h"
+#include "Header.h"
+#include "HeaderLayout.h"
+#include "Object.h"
+#include "OptionItem.h"
+#include "ProvideCurses.h"
+
+
+static const char* const HeaderOptionsFunctions[] = {"      ", "      ", "      ", "      ", "      ", "      ", "      ", "      ", "      ", "Done  ", NULL};
+
+static void HeaderOptionsPanel_delete(Object* object) {
+   Panel* super = (Panel*) object;
+   HeaderOptionsPanel* this = (HeaderOptionsPanel*) object;
+   Panel_done(super);
+   free(this);
+}
+
+static HandlerResult HeaderOptionsPanel_eventHandler(Panel* super, int ch) {
+   HeaderOptionsPanel* this = (HeaderOptionsPanel*) super;
+
+   HandlerResult result = IGNORED;
+   int mark;
+
+   switch (ch) {
+   case 0x0a:
+   case 0x0d:
+   case KEY_ENTER:
+   case KEY_MOUSE:
+   case KEY_RECLICK:
+   case ' ':
+      mark = Panel_getSelectedIndex(super);
+      assert(mark >= 0);
+      assert(mark < LAST_HEADER_LAYOUT);
+
+      for (int i = 0; i < LAST_HEADER_LAYOUT; i++)
+         CheckItem_set((CheckItem*)Panel_get(super, i), false);
+      CheckItem_set((CheckItem*)Panel_get(super, mark), true);
+
+      Header_setLayout(this->scr->header, mark);
+      this->settings->changed = true;
+      this->settings->lastUpdate++;
+
+      ScreenManager_resize(this->scr);
+
+      result = HANDLED;
+   }
+
+   return result;
+}
+
+const PanelClass HeaderOptionsPanel_class = {
+   .super = {
+      .extends = Class(Panel),
+      .delete = HeaderOptionsPanel_delete
+   },
+   .eventHandler = HeaderOptionsPanel_eventHandler
+};
+
+HeaderOptionsPanel* HeaderOptionsPanel_new(Settings* settings, ScreenManager* scr) {
+   HeaderOptionsPanel* this = AllocThis(HeaderOptionsPanel);
+   Panel* super = (Panel*) this;
+   FunctionBar* fuBar = FunctionBar_new(HeaderOptionsFunctions, NULL, NULL);
+   Panel_init(super, 1, 1, 1, 1, Class(CheckItem), true, fuBar);
+
+   this->scr = scr;
+   this->settings = settings;
+
+   Panel_setHeader(super, "Header Layout");
+   for (int i = 0; i < LAST_HEADER_LAYOUT; i++) {
+      Panel_add(super, (Object*) CheckItem_newByVal(HeaderLayout_layouts[i].description, false));
+   }
+   CheckItem_set((CheckItem*)Panel_get(super, scr->header->headerLayout), true);
+   return this;
+}

HeaderOptionsPanel.h

@@ -0,0 +1,26 @@
+#ifndef HEADER_HeaderOptionsPanel
+#define HEADER_HeaderOptionsPanel
+/*
+htop - ColorsPanel.h
+(C) 2021 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "Panel.h"
+#include "ScreenManager.h"
+#include "Settings.h"
+
+
+typedef struct HeaderOptionsPanel_ {
+   Panel super;
+
+   ScreenManager* scr;
+   Settings* settings;
+} HeaderOptionsPanel;
+
+extern const PanelClass HeaderOptionsPanel_class;
+
+HeaderOptionsPanel* HeaderOptionsPanel_new(Settings* settings, ScreenManager* scr);
+
+#endif /* HEADER_HeaderOptionsPanel */

HostnameMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - HostnameMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -9,19 +9,17 @@ in the source distribution for its full text.
 
 #include "HostnameMeter.h"
 
-#include <unistd.h>
-
 #include "CRT.h"
 #include "Object.h"
+#include "Platform.h"
 
 
 static const int HostnameMeter_attributes[] = {
    HOSTNAME
 };
 
-static void HostnameMeter_updateValues(Meter* this, char* buffer, size_t size) {
-   (void) this;
-   gethostname(buffer, size - 1);
+static void HostnameMeter_updateValues(Meter* this) {
+   Platform_getHostname(this->txtBuffer, sizeof(this->txtBuffer));
 }
 
 const MeterClass HostnameMeter_class = {

HostnameMeter.h

@@ -3,12 +3,13 @@
 /*
 htop - HostnameMeter.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "Meter.h"
 
+
 extern const MeterClass HostnameMeter_class;
 
 #endif

IncSet.c

@@ -1,7 +1,7 @@
 /*
 htop - IncSet.c
 (C) 2005-2012 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -29,9 +29,16 @@ void IncSet_reset(IncSet* this, IncType type) {
    IncMode_reset(&this->modes[type]);
 }
 
-static const char* const searchFunctions[] = {"Next  ", "Cancel ", " Search: ", NULL};
-static const char* const searchKeys[] = {"F3", "Esc", "  "};
-static const int searchEvents[] = {KEY_F(3), 27, ERR};
+void IncSet_setFilter(IncSet* this, const char* filter) {
+   IncMode* mode = &this->modes[INC_FILTER];
+   size_t len = String_safeStrncpy(mode->buffer, filter, sizeof(mode->buffer));
+   mode->index = len;
+   this->filtering = true;
+}
+
+static const char* const searchFunctions[] = {"Next  ", "Prev   ", "Cancel ", " Search: ", NULL};
+static const char* const searchKeys[] = {"F3", "S-F3", "Esc", "  "};
+static const int searchEvents[] = {KEY_F(3), KEY_F(15), 27, ERR};
 
 static inline void IncMode_initSearch(IncMode* search) {
    memset(search, 0, sizeof(IncMode));
@@ -70,15 +77,15 @@ void IncSet_delete(IncSet* this) {
    free(this);
 }
 
-static void updateWeakPanel(IncSet* this, Panel* panel, Vector* lines) {
-   Object* selected = Panel_getSelected(panel);
+static void updateWeakPanel(const IncSet* this, Panel* panel, Vector* lines) {
+   const Object* selected = Panel_getSelected(panel);
    Panel_prune(panel);
    if (this->filtering) {
       int n = 0;
       const char* incFilter = this->modes[INC_FILTER].buffer;
       for (int i = 0; i < Vector_size(lines); i++) {
          ListItem* line = (ListItem*)Vector_get(lines, i);
-         if (String_contains_i(line->value, incFilter)) {
+         if (String_contains_i(line->value, incFilter, true)) {
             Panel_add(panel, (Object*)line);
             if (selected == (Object*)line) {
                Panel_setSelected(panel, n);
@@ -98,10 +105,10 @@ static void updateWeakPanel(IncSet* this, Panel* panel, Vector* lines) {
    }
 }
 
-static bool search(IncMode* mode, Panel* panel, IncMode_GetPanelValue getPanelValue) {
+static bool search(const IncSet* this, Panel* panel, IncMode_GetPanelValue getPanelValue) {
    int size = Panel_size(panel);
    for (int i = 0; i < size; i++) {
-      if (String_contains_i(getPanelValue(panel, i), mode->buffer)) {
+      if (String_contains_i(getPanelValue(panel, i), this->active->buffer, true)) {
          Panel_setSelected(panel, i);
          return true;
       }
@@ -110,7 +117,22 @@ static bool search(IncMode* mode, Panel* panel, IncMode_GetPanelValue getPanelVa
    return false;
 }
 
-static bool IncMode_find(IncMode* mode, Panel* panel, IncMode_GetPanelValue getPanelValue, int step) {
+void IncSet_activate(IncSet* this, IncType type, Panel* panel) {
+   this->active = &(this->modes[type]);
+   panel->currentBar = this->active->bar;
+   panel->cursorOn = true;
+   this->panel = panel;
+   IncSet_drawBar(this, CRT_colors[FUNCTION_BAR]);
+}
+
+static void IncSet_deactivate(IncSet* this, Panel* panel) {
+   this->active = NULL;
+   Panel_setDefaultBar(panel);
+   panel->cursorOn = false;
+   FunctionBar_draw(this->defaultBar);
+}
+
+static bool IncMode_find(const IncMode* mode, Panel* panel, IncMode_GetPanelValue getPanelValue, int step) {
    int size = Panel_size(panel);
    int here = Panel_getSelectedIndex(panel);
    int i = here;
@@ -126,21 +148,13 @@ static bool IncMode_find(IncMode* mode, Panel* panel, IncMode_GetPanelValue getP
          return false;
       }
 
-      if (String_contains_i(getPanelValue(panel, i), mode->buffer)) {
+      if (String_contains_i(getPanelValue(panel, i), mode->buffer, true)) {
          Panel_setSelected(panel, i);
          return true;
       }
    }
 }
 
-bool IncSet_next(IncSet* this, IncType type, Panel* panel, IncMode_GetPanelValue getPanelValue) {
-   return IncMode_find(&this->modes[type], panel, getPanelValue, 1);
-}
-
-bool IncSet_prev(IncSet* this, IncType type, Panel* panel, IncMode_GetPanelValue getPanelValue) {
-   return IncMode_find(&this->modes[type], panel, getPanelValue, -1);
-}
-
 bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue getPanelValue, Vector* lines) {
    if (ch == ERR)
       return true;
@@ -149,15 +163,15 @@ bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue
    int size = Panel_size(panel);
    bool filterChanged = false;
    bool doSearch = true;
-   if (ch == KEY_F(3)) {
+   if (ch == KEY_F(3) || ch == KEY_F(15)) {
       if (size == 0)
          return true;
 
-      IncMode_find(mode, panel, getPanelValue, 1);
+      IncMode_find(mode, panel, getPanelValue, ch == KEY_F(3) ? 1 : -1);
       doSearch = false;
    } else if (0 < ch && ch < 255 && isprint((unsigned char)ch)) {
       if (mode->index < INCMODE_MAX) {
-         mode->buffer[mode->index] = ch;
+         mode->buffer[mode->index] = (char) ch;
          mode->index++;
          mode->buffer[mode->index] = 0;
          if (mode->isFilter) {
@@ -167,7 +181,7 @@ bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue
             }
          }
       }
-   } else if ((ch == KEY_BACKSPACE || ch == 127)) {
+   } else if (ch == KEY_BACKSPACE || ch == 127) {
       if (mode->index > 0) {
          mode->index--;
          mode->buffer[mode->index] = 0;
@@ -182,7 +196,7 @@ bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue
          doSearch = false;
       }
    } else if (ch == KEY_RESIZE) {
-      Panel_resize(panel, COLS, LINES - panel->y - 1);
+      doSearch = (mode->index > 0);
    } else {
       if (mode->isFilter) {
          filterChanged = true;
@@ -195,12 +209,11 @@ bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue
             IncMode_reset(mode);
          }
       }
-      this->active = NULL;
-      Panel_setDefaultBar(panel);
+      IncSet_deactivate(this, panel);
       doSearch = false;
    }
    if (doSearch) {
-      this->found = search(mode, panel, getPanelValue);
+      this->found = search(this, panel, getPanelValue);
    }
    if (filterChanged && lines) {
       updateWeakPanel(this, panel, lines);
@@ -209,18 +222,17 @@ bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue
 }
 
 const char* IncSet_getListItemValue(Panel* panel, int i) {
-   ListItem* l = (ListItem*) Panel_get(panel, i);
+   const ListItem* l = (const ListItem*) Panel_get(panel, i);
    return l ? l->value : "";
 }
 
-void IncSet_activate(IncSet* this, IncType type, Panel* panel) {
-   this->active = &(this->modes[type]);
-   panel->currentBar = this->active->bar;
-}
-
-void IncSet_drawBar(const IncSet* this) {
+void IncSet_drawBar(const IncSet* this, int attr) {
    if (this->active) {
-      FunctionBar_drawExtra(this->active->bar, this->active->buffer, (this->active->isFilter || this->found) ? -1 : CRT_colors[FAILED_SEARCH], true);
+      if (!this->active->isFilter && !this->found)
+         attr = CRT_colors[FAILED_SEARCH];
+      int cursorX = FunctionBar_drawExtra(this->active->bar, this->active->buffer, attr, true);
+      this->panel->cursorY = LINES - 1;
+      this->panel->cursorX = cursorX;
    } else {
       FunctionBar_draw(this->defaultBar);
    }

IncSet.h

@@ -3,7 +3,7 @@
 /*
 htop - IncSet.h
 (C) 2005-2012 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -14,6 +14,7 @@ in the source distribution for its full text.
 #include "Panel.h"
 #include "Vector.h"
 
+
 #define INCMODE_MAX 40
 
 typedef enum {
@@ -31,6 +32,7 @@ typedef struct IncMode_ {
 typedef struct IncSet_ {
    IncMode modes[2];
    IncMode* active;
+   Panel* panel;
    FunctionBar* defaultBar;
    bool filtering;
    bool found;
@@ -40,6 +42,8 @@ static inline const char* IncSet_filter(const IncSet* this) {
    return this->filtering ? this->modes[INC_FILTER].buffer : NULL;
 }
 
+void IncSet_setFilter(IncSet* this, const char* filter);
+
 typedef const char* (*IncMode_GetPanelValue)(Panel*, int);
 
 void IncSet_reset(IncSet* this, IncType type);
@@ -48,17 +52,13 @@ IncSet* IncSet_new(FunctionBar* bar);
 
 void IncSet_delete(IncSet* this);
 
-bool IncSet_next(IncSet* this, IncType type, Panel* panel, IncMode_GetPanelValue getPanelValue);
-
-bool IncSet_prev(IncSet* this, IncType type, Panel* panel, IncMode_GetPanelValue getPanelValue);
-
 bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue getPanelValue, Vector* lines);
 
 const char* IncSet_getListItemValue(Panel* panel, int i);
 
 void IncSet_activate(IncSet* this, IncType type, Panel* panel);
 
-void IncSet_drawBar(const IncSet* this);
+void IncSet_drawBar(const IncSet* this, int attr);
 
 int IncSet_synthesizeEvent(IncSet* this, int x);
 

InfoScreen.c

@@ -4,7 +4,6 @@
 
 #include <stdarg.h>
 #include <stdio.h>
-#include <stdlib.h>
 #include <string.h>
 
 #include "CRT.h"
@@ -26,9 +25,9 @@ InfoScreen* InfoScreen_init(InfoScreen* this, const Process* process, FunctionBa
    if (!bar) {
       bar = FunctionBar_new(InfoScreenFunctions, InfoScreenKeys, InfoScreenEvents);
    }
-   this->display = Panel_new(0, 1, COLS, height, false, Class(ListItem), bar);
+   this->display = Panel_new(0, 1, COLS, height, Class(ListItem), false, bar);
    this->inc = IncSet_new(bar);
-   this->lines = Vector_new(this->display->items->type, true, DEFAULT_SIZE);
+   this->lines = Vector_new(Vector_type(this->display->items), true, DEFAULT_SIZE);
    Panel_setHeader(this->display, panelHeader);
    return this;
 }
@@ -54,17 +53,17 @@ void InfoScreen_drawTitled(InfoScreen* this, const char* fmt, ...) {
 
    attrset(CRT_colors[METER_TEXT]);
    mvhline(0, 0, ' ', COLS);
-   mvwprintw(stdscr, 0, 0, title);
+   mvaddstr(0, 0, title);
    attrset(CRT_colors[DEFAULT_COLOR]);
-   Panel_draw(this->display, true, true, true);
+   Panel_draw(this->display, true, true, true, false);
 
-   IncSet_drawBar(this->inc);
+   IncSet_drawBar(this->inc, CRT_colors[FUNCTION_BAR]);
 }
 
 void InfoScreen_addLine(InfoScreen* this, const char* line) {
    Vector_add(this->lines, (Object*) ListItem_new(line, 0));
    const char* incFilter = IncSet_filter(this->inc);
-   if (!incFilter || String_contains_i(line, incFilter)) {
+   if (!incFilter || String_contains_i(line, incFilter, true)) {
       Panel_add(this->display, Vector_get(this->lines, Vector_size(this->lines) - 1));
    }
 }
@@ -73,7 +72,7 @@ void InfoScreen_appendLine(InfoScreen* this, const char* line) {
    ListItem* last = (ListItem*)Vector_get(this->lines, Vector_size(this->lines) - 1);
    ListItem_append(last, line);
    const char* incFilter = IncSet_filter(this->inc);
-   if (incFilter && Panel_get(this->display, Panel_size(this->display) - 1) != (Object*)last && String_contains_i(line, incFilter)) {
+   if (incFilter && Panel_get(this->display, Panel_size(this->display) - 1) != (Object*)last && String_contains_i(line, incFilter, true)) {
       Panel_add(this->display, (Object*)last);
    }
 }
@@ -89,14 +88,10 @@ void InfoScreen_run(InfoScreen* this) {
    bool looping = true;
    while (looping) {
 
-      Panel_draw(panel, false, true, true);
-      IncSet_drawBar(this->inc);
+      Panel_draw(panel, false, true, true, false);
+      IncSet_drawBar(this->inc, CRT_colors[FUNCTION_BAR]);
 
-      if (this->inc->active) {
-         (void) move(LINES - 1, CRT_cursorX);
-      }
-      set_escdelay(25);
-      int ch = getch();
+      int ch = Panel_getCh(panel);
 
       if (ch == ERR) {
          if (As_InfoScreen(this)->onErr) {
@@ -105,18 +100,29 @@ void InfoScreen_run(InfoScreen* this) {
          }
       }
 
+#ifdef HAVE_GETMOUSE
       if (ch == KEY_MOUSE) {
          MEVENT mevent;
          int ok = getmouse(&mevent);
          if (ok == OK) {
+            if (mevent.bstate & BUTTON1_RELEASED) {
                if (mevent.y >= panel->y && mevent.y < LINES - 1) {
-               Panel_setSelected(panel, mevent.y - panel->y + panel->scrollV);
+                  Panel_setSelected(panel, mevent.y - panel->y + panel->scrollV - 1);
                   ch = 0;
                } else if (mevent.y == LINES - 1) {
                   ch = IncSet_synthesizeEvent(this->inc, mevent.x);
                }
             }
+            #if NCURSES_MOUSE_VERSION > 1
+            else if (mevent.bstate & BUTTON4_PRESSED) {
+               ch = KEY_WHEELUP;
+            } else if (mevent.bstate & BUTTON5_PRESSED) {
+               ch = KEY_WHEELDOWN;
             }
+            #endif
+         }
+      }
+#endif
 
       if (this->inc->active) {
          IncSet_handleKey(this->inc, ch, panel, IncSet_getListItemValue, this->lines);
@@ -136,8 +142,10 @@ void InfoScreen_run(InfoScreen* this) {
          break;
       case KEY_F(5):
          clear();
-         if (As_InfoScreen(this)->scan)
+         if (As_InfoScreen(this)->scan) {
+            Vector_prune(this->lines);
             InfoScreen_scan(this);
+         }
 
          InfoScreen_draw(this);
          break;
@@ -152,8 +160,10 @@ void InfoScreen_run(InfoScreen* this) {
          break;
       case KEY_RESIZE:
          Panel_resize(panel, COLS, LINES - 2);
-         if (As_InfoScreen(this)->scan)
+         if (As_InfoScreen(this)->scan) {
+            Vector_prune(this->lines);
             InfoScreen_scan(this);
+         }
 
          InfoScreen_draw(this);
          break;

ListItem.c

@@ -1,7 +1,7 @@
 /*
 htop - ListItem.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -18,13 +18,13 @@ in the source distribution for its full text.
 #include "XUtils.h"
 
 
-static void ListItem_delete(Object* cast) {
+void ListItem_delete(Object* cast) {
    ListItem* this = (ListItem*)cast;
    free(this->value);
    free(this);
 }
 
-static void ListItem_display(const Object* cast, RichString* out) {
+void ListItem_display(const Object* cast, RichString* out) {
    const ListItem* const this = (const ListItem*)cast;
    assert (this != NULL);
 
@@ -34,17 +34,19 @@ static void ListItem_display(const Object* cast, RichString* out) {
                            CRT_utf8 ? "↕ " :
 #endif
                            "+ ");
-   } else {
-      RichString_prune(out);
    }
    RichString_appendWide(out, CRT_colors[DEFAULT_COLOR], this->value);
 }
 
-ListItem* ListItem_new(const char* value, int key) {
-   ListItem* this = AllocThis(ListItem);
+void ListItem_init(ListItem* this, const char* value, int key) {
    this->value = xStrdup(value);
    this->key = key;
    this->moving = false;
+}
+
+ListItem* ListItem_new(const char* value, int key) {
+   ListItem* this = AllocThis(ListItem);
+   ListItem_init(this, value, key);
    return this;
 }
 
@@ -57,7 +59,7 @@ void ListItem_append(ListItem* this, const char* text) {
    this->value[newLen] = '\0';
 }
 
-static long ListItem_compare(const void* cast1, const void* cast2) {
+int ListItem_compare(const void* cast1, const void* cast2) {
    const ListItem* obj1 = (const ListItem*) cast1;
    const ListItem* obj2 = (const ListItem*) cast2;
    return strcmp(obj1->value, obj2->value);

ListItem.h

@@ -3,7 +3,7 @@
 /*
 htop - ListItem.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -11,6 +11,7 @@ in the source distribution for its full text.
 
 #include "Object.h"
 
+
 typedef struct ListItem_ {
    Object super;
    char* value;
@@ -20,10 +21,18 @@ typedef struct ListItem_ {
 
 extern const ObjectClass ListItem_class;
 
+void ListItem_delete(Object* cast);
+
+void ListItem_display(const Object* cast, RichString* out);
+
+void ListItem_init(ListItem* this, const char* value, int key);
+
 ListItem* ListItem_new(const char* value, int key);
 
 void ListItem_append(ListItem* this, const char* text);
 
+int ListItem_compare(const void* cast1, const void* cast2);
+
 static inline const char* ListItem_getRef(const ListItem* this) {
    return this->value;
 }

LoadAverageMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - LoadAverageMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -10,6 +10,7 @@ in the source distribution for its full text.
 #include "CRT.h"
 #include "Object.h"
 #include "Platform.h"
+#include "ProcessList.h"
 #include "RichString.h"
 #include "XUtils.h"
 
@@ -24,36 +25,78 @@ static const int LoadMeter_attributes[] = {
    LOAD
 };
 
-static void LoadAverageMeter_updateValues(Meter* this, char* buffer, size_t size) {
+static const int OK_attributes[] = {
+   METER_VALUE_OK
+};
+
+static const int Medium_attributes[] = {
+   METER_VALUE_WARN
+};
+
+static const int High_attributes[] = {
+   METER_VALUE_ERROR
+};
+
+static void LoadAverageMeter_updateValues(Meter* this) {
    Platform_getLoadAverage(&this->values[0], &this->values[1], &this->values[2]);
-   xSnprintf(buffer, size, "%.2f/%.2f/%.2f", this->values[0], this->values[1], this->values[2]);
+
+   // only show bar for 1min value
+   this->curItems = 1;
+
+   // change bar color and total based on value
+   if (this->values[0] < 1.0) {
+      this->curAttributes = OK_attributes;
+      this->total = 1.0;
+   } else if (this->values[0] < this->pl->activeCPUs) {
+      this->curAttributes = Medium_attributes;
+      this->total = this->pl->activeCPUs;
+   } else {
+      this->curAttributes = High_attributes;
+      this->total = 2 * this->pl->activeCPUs;
+   }
+
+   xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "%.2f/%.2f/%.2f", this->values[0], this->values[1], this->values[2]);
 }
 
 static void LoadAverageMeter_display(const Object* cast, RichString* out) {
    const Meter* this = (const Meter*)cast;
    char buffer[20];
-   xSnprintf(buffer, sizeof(buffer), "%.2f ", this->values[0]);
-   RichString_writeAscii(out, CRT_colors[LOAD_AVERAGE_ONE], buffer);
-   xSnprintf(buffer, sizeof(buffer), "%.2f ", this->values[1]);
-   RichString_appendAscii(out, CRT_colors[LOAD_AVERAGE_FIVE], buffer);
-   xSnprintf(buffer, sizeof(buffer), "%.2f ", this->values[2]);
-   RichString_appendAscii(out, CRT_colors[LOAD_AVERAGE_FIFTEEN], buffer);
+   int len;
+
+   len = xSnprintf(buffer, sizeof(buffer), "%.2f ", this->values[0]);
+   RichString_appendnAscii(out, CRT_colors[LOAD_AVERAGE_ONE], buffer, len);
+   len = xSnprintf(buffer, sizeof(buffer), "%.2f ", this->values[1]);
+   RichString_appendnAscii(out, CRT_colors[LOAD_AVERAGE_FIVE], buffer, len);
+   len = xSnprintf(buffer, sizeof(buffer), "%.2f ", this->values[2]);
+   RichString_appendnAscii(out, CRT_colors[LOAD_AVERAGE_FIFTEEN], buffer, len);
 }
 
-static void LoadMeter_updateValues(Meter* this, char* buffer, size_t size) {
+static void LoadMeter_updateValues(Meter* this) {
    double five, fifteen;
    Platform_getLoadAverage(&this->values[0], &five, &fifteen);
-   if (this->values[0] > this->total) {
-      this->total = this->values[0];
+
+   // change bar color and total based on value
+   if (this->values[0] < 1.0) {
+      this->curAttributes = OK_attributes;
+      this->total = 1.0;
+   } else if (this->values[0] < this->pl->activeCPUs) {
+      this->curAttributes = Medium_attributes;
+      this->total = this->pl->activeCPUs;
+   } else {
+      this->curAttributes = High_attributes;
+      this->total = 2 * this->pl->activeCPUs;
    }
-   xSnprintf(buffer, size, "%.2f", this->values[0]);
+
+   xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "%.2f", this->values[0]);
 }
 
 static void LoadMeter_display(const Object* cast, RichString* out) {
    const Meter* this = (const Meter*)cast;
    char buffer[20];
-   xSnprintf(buffer, sizeof(buffer), "%.2f ", this->values[0]);
-   RichString_writeAscii(out, CRT_colors[LOAD], buffer);
+   int len;
+
+   len = xSnprintf(buffer, sizeof(buffer), "%.2f ", this->values[0]);
+   RichString_appendnAscii(out, CRT_colors[LOAD], buffer, len);
 }
 
 const MeterClass LoadAverageMeter_class = {

LoadAverageMeter.h

@@ -3,12 +3,13 @@
 /*
 htop - LoadAverageMeter.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "Meter.h"
 
+
 extern const MeterClass LoadAverageMeter_class;
 
 extern const MeterClass LoadMeter_class;

Macros.h

@@ -27,12 +27,17 @@
 #define SPACESHIP_NULLSTR(a, b)        strcmp((a) ? (a) : "", (b) ? (b) : "")
 #endif
 
+#ifndef SPACESHIP_DEFAULTSTR
+#define SPACESHIP_DEFAULTSTR(a, b, s)  strcmp((a) ? (a) : (s), (b) ? (b) : (s))
+#endif
+
 #ifdef  __GNUC__  // defined by GCC and Clang
 
 #define ATTR_FORMAT(type, index, check) __attribute__((format (type, index, check)))
 #define ATTR_NONNULL                    __attribute__((nonnull))
 #define ATTR_NORETURN                   __attribute__((noreturn))
 #define ATTR_UNUSED                     __attribute__((unused))
+#define ATTR_MALLOC                     __attribute__((malloc))
 
 #else /* __GNUC__ */
 
@@ -40,13 +45,26 @@
 #define ATTR_NONNULL
 #define ATTR_NORETURN
 #define ATTR_UNUSED
+#define ATTR_MALLOC
 
 #endif /* __GNUC__ */
 
+#ifdef HAVE_ATTR_ALLOC_SIZE
+
+#define ATTR_ALLOC_SIZE1(a)             __attribute__((alloc_size (a)))
+#define ATTR_ALLOC_SIZE2(a, b)          __attribute__((alloc_size (a, b)))
+
+#else
+
+#define ATTR_ALLOC_SIZE1(a)
+#define ATTR_ALLOC_SIZE2(a, b)
+
+#endif /* HAVE_ATTR_ALLOC_SIZE */
+
 // ignore casts discarding const specifier, e.g.
 //     const char []     ->  char * / void *
 //     const char *[2]'  ->  char *const *
-#ifdef __clang__
+#if defined(__clang__)
 #define IGNORE_WCASTQUAL_BEGIN  _Pragma("clang diagnostic push") \
                                 _Pragma("clang diagnostic ignored \"-Wcast-qual\"")
 #define IGNORE_WCASTQUAL_END    _Pragma("clang diagnostic pop")
@@ -59,4 +77,9 @@
 #define IGNORE_WCASTQUAL_END
 #endif
 
+/* This subtraction is used by Linux / NetBSD / OpenBSD for calculation of CPU usage items. */
+static inline unsigned long long saturatingSub(unsigned long long a, unsigned long long b) {
+   return a > b ? a - b : 0;
+}
+
 #endif

MainPanel.c

@@ -2,7 +2,7 @@
 htop - ColumnsPanel.c
 (C) 2004-2015 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -22,17 +22,19 @@ in the source distribution for its full text.
 
 
 static const char* const MainFunctions[]     = {"Help  ", "Setup ", "Search", "Filter", "Tree  ", "SortBy", "Nice -", "Nice +", "Kill  ", "Quit  ", NULL};
+static const char* const MainFunctions_ro[]  = {"Help  ", "Setup ", "Search", "Filter", "Tree  ", "SortBy", "      ", "      ", "      ", "Quit  ", NULL};
 
-void MainPanel_updateTreeFunctions(MainPanel* this, bool mode) {
+void MainPanel_updateLabels(MainPanel* this, bool list, bool filter) {
    FunctionBar* bar = MainPanel_getFunctionBar(this);
-   FunctionBar_setLabel(bar, KEY_F(5), mode ? "List  " : "Tree  ");
+   FunctionBar_setLabel(bar, KEY_F(5), list   ? "List  " : "Tree  ");
+   FunctionBar_setLabel(bar, KEY_F(4), filter ? "FILTER" : "Filter");
 }
 
-void MainPanel_pidSearch(MainPanel* this, int ch) {
+static void MainPanel_pidSearch(MainPanel* this, int ch) {
    Panel* super = (Panel*) this;
    pid_t pid = ch - 48 + this->pidSearch;
    for (int i = 0; i < Panel_size(super); i++) {
-      Process* p = (Process*) Panel_get(super, i);
+      const Process* p = (const Process*) Panel_get(super, i);
       if (p && p->pid == pid) {
          Panel_setSelected(super, i);
          break;
@@ -44,6 +46,11 @@ void MainPanel_pidSearch(MainPanel* this, int ch) {
    }
 }
 
+static const char* MainPanel_getValue(Panel* this, int i) {
+   const Process* p = (const Process*) Panel_get(this, i);
+   return Process_getCommand(p);
+}
+
 static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
    MainPanel* this = (MainPanel*) super;
 
@@ -51,28 +58,45 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
 
    Htop_Reaction reaction = HTOP_OK;
 
-   if (ch != ERR && ch != KEY_RESIZE)
+   /* Let supervising ScreenManager handle resize */
+   if (ch == KEY_RESIZE)
+      return IGNORED;
+
+   /* reset on every normal key */
+   bool needReset = ch != ERR;
+   #ifdef HAVE_GETMOUSE
+   /* except mouse events while mouse support is disabled */
+   if (!(ch != KEY_MOUSE || this->state->settings->enableMouse))
+      needReset = false;
+   #endif
+   if (needReset)
       this->state->hideProcessSelection = false;
 
+   Settings* settings = this->state->settings;
+   ScreenSettings* ss = settings->ss;
+
    if (EVENT_IS_HEADER_CLICK(ch)) {
       int x = EVENT_HEADER_CLICK_GET_X(ch);
       const ProcessList* pl = this->state->pl;
-      Settings* settings = this->state->settings;
       int hx = super->scrollH + x + 1;
       ProcessField field = ProcessList_keyAt(pl, hx);
-      if (settings->treeView && settings->treeViewAlwaysByPID) {
-         settings->treeView = false;
-         settings->direction = 1;
+      if (ss->treeView && ss->treeViewAlwaysByPID) {
+         ss->treeView = false;
+         ss->direction = 1;
          reaction |= Action_setSortKey(settings, field);
-      } else if (field == Settings_getActiveSortKey(settings)) {
-         Settings_invertSortOrder(settings);
+      } else if (field == ScreenSettings_getActiveSortKey(ss)) {
+         ScreenSettings_invertSortOrder(ss);
       } else {
          reaction |= Action_setSortKey(settings, field);
       }
       reaction |= HTOP_RECALCULATE | HTOP_REDRAW_BAR | HTOP_SAVE_SETTINGS;
       result = HANDLED;
+   } else if (EVENT_IS_SCREEN_TAB_CLICK(ch)) {
+      int x = EVENT_SCREEN_TAB_GET_X(ch);
+      reaction |= Action_setScreenTab(settings, x);
+      result = HANDLED;
    } else if (ch != ERR && this->inc->active) {
-      bool filterChanged = IncSet_handleKey(this->inc, ch, super, (IncMode_GetPanelValue) MainPanel_getValue, NULL);
+      bool filterChanged = IncSet_handleKey(this->inc, ch, super, MainPanel_getValue, NULL);
       if (filterChanged) {
          this->state->pl->incFilter = IncSet_filter(this->inc);
          reaction = HTOP_REFRESH | HTOP_REDRAW_BAR;
@@ -99,10 +123,13 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
    }
 
    if (reaction & HTOP_REDRAW_BAR) {
-      MainPanel_updateTreeFunctions(this, this->state->settings->treeView);
+      MainPanel_updateLabels(this, settings->ss->treeView, this->state->pl->incFilter);
+   }
+   if (reaction & HTOP_RESIZE) {
+      result |= RESIZE;
    }
    if (reaction & HTOP_UPDATE_PANELHDR) {
-      ProcessList_printHeader(this->state->pl, Panel_getHeader(super));
+      result |= REDRAW;
    }
    if (reaction & HTOP_REFRESH) {
       result |= REFRESH;
@@ -124,18 +151,13 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
 }
 
 int MainPanel_selectedPid(MainPanel* this) {
-   Process* p = (Process*) Panel_getSelected((Panel*)this);
+   const Process* p = (const Process*) Panel_getSelected((Panel*)this);
    if (p) {
       return p->pid;
    }
    return -1;
 }
 
-const char* MainPanel_getValue(MainPanel* this, int i) {
-   Process* p = (Process*) Panel_get((Panel*)this, i);
-   return Process_getCommand(p);
-}
-
 bool MainPanel_foreachProcess(MainPanel* this, MainPanel_ForeachProcessFn fn, Arg arg, bool* wasAnyTagged) {
    Panel* super = (Panel*) this;
    bool ok = true;
@@ -160,26 +182,37 @@ bool MainPanel_foreachProcess(MainPanel* this, MainPanel_ForeachProcessFn fn, Ar
    return ok;
 }
 
-static void MainPanel_drawFunctionBar(Panel* super) {
+static void MainPanel_drawFunctionBar(Panel* super, bool hideFunctionBar) {
    MainPanel* this = (MainPanel*) super;
-   IncSet_drawBar(this->inc);
+
+   // Do not hide active search and filter bar.
+   if (hideFunctionBar && !this->inc->active)
+      return;
+
+   IncSet_drawBar(this->inc, CRT_colors[FUNCTION_BAR]);
    if (this->state->pauseProcessUpdate) {
       FunctionBar_append("PAUSED", CRT_colors[PAUSED]);
    }
 }
 
+static void MainPanel_printHeader(Panel* super) {
+   MainPanel* this = (MainPanel*) super;
+   ProcessList_printHeader(this->state->pl, &super->header);
+}
+
 const PanelClass MainPanel_class = {
    .super = {
       .extends = Class(Panel),
       .delete = MainPanel_delete
    },
    .eventHandler = MainPanel_eventHandler,
-   .drawFunctionBar = MainPanel_drawFunctionBar
+   .drawFunctionBar = MainPanel_drawFunctionBar,
+   .printHeader = MainPanel_printHeader
 };
 
 MainPanel* MainPanel_new() {
    MainPanel* this = AllocThis(MainPanel);
-   Panel_init((Panel*) this, 1, 1, 1, 1, Class(Process), false, FunctionBar_new(MainFunctions, NULL, NULL));
+   Panel_init((Panel*) this, 1, 1, 1, 1, Class(Process), false, FunctionBar_new(Settings_isReadonly() ? MainFunctions_ro : MainFunctions, NULL, NULL));
    this->keys = xCalloc(KEY_MAX, sizeof(Htop_Action));
    this->inc = IncSet_new(MainPanel_getFunctionBar(this));
 

MainPanel.h

@@ -4,7 +4,7 @@
 htop - ColumnsPanel.h
 (C) 2004-2015 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -32,14 +32,11 @@ typedef bool(*MainPanel_ForeachProcessFn)(Process*, Arg);
 
 #define MainPanel_getFunctionBar(this_) (((Panel*)(this_))->defaultBar)
 
-void MainPanel_updateTreeFunctions(MainPanel* this, bool mode);
-
-void MainPanel_pidSearch(MainPanel* this, int ch);
+// update the Label Keys in the MainPanel bar, list: list / tree mode, filter: filter (inc) active / inactive
+void MainPanel_updateLabels(MainPanel* this, bool list, bool filter);
 
 int MainPanel_selectedPid(MainPanel* this);
 
-const char* MainPanel_getValue(MainPanel* this, int i);
-
 bool MainPanel_foreachProcess(MainPanel* this, MainPanel_ForeachProcessFn fn, Arg arg, bool* wasAnyTagged);
 
 extern const PanelClass MainPanel_class;

Makefile.am

@@ -1,10 +1,22 @@
-AUTOMAKE_OPTIONS = subdir-objects
-
+if !HTOP_PCP
 bin_PROGRAMS = htop
+myhtopplatprogram = htop.c
+else
+bin_PROGRAMS = pcp-htop
+myhtopplatprogram = pcp-htop.c
+endif
 
 dist_man_MANS = htop.1
-EXTRA_DIST = $(dist_man_MANS) htop.desktop htop.png htop.svg \
-install-sh autogen.sh missing
+EXTRA_DIST = \
+	$(dist_man_MANS) \
+	autogen.sh \
+	htop.desktop \
+	htop.png \
+	htop.svg \
+	build-aux/compile \
+	build-aux/depcomp \
+	build-aux/install-sh \
+	build-aux/missing
 applicationsdir = $(datadir)/applications
 applications_DATA = htop.desktop
 pixmapdir = $(datadir)/pixmaps
@@ -12,7 +24,7 @@ pixmap_DATA = htop.png
 appicondir = $(datadir)/icons/hicolor/scalable/apps
 appicon_DATA = htop.svg
 
-AM_CFLAGS += -pedantic -std=c99 -D_XOPEN_SOURCE_EXTENDED -DSYSCONFDIR=\"$(sysconfdir)\" -I"$(top_srcdir)/$(my_htop_platform)"
+AM_CFLAGS += -pedantic -std=c99 -D_XOPEN_SOURCE_EXTENDED -DSYSCONFDIR="\"$(sysconfdir)\"" -I"$(top_srcdir)/$(my_htop_platform)"
 AM_LDFLAGS =
 
 myhtopsources = \
@@ -26,6 +38,7 @@ myhtopsources = \
 	ClockMeter.c \
 	ColorsPanel.c \
 	ColumnsPanel.c \
+	CommandLine.c \
 	CommandScreen.c \
 	Compat.c \
 	CPUMeter.c \
@@ -34,18 +47,21 @@ myhtopsources = \
 	DateTimeMeter.c \
 	DiskIOMeter.c \
 	DisplayOptionsPanel.c \
+	DynamicColumn.c \
+	DynamicMeter.c \
 	EnvScreen.c \
 	FunctionBar.c \
 	Hashtable.c \
 	Header.c \
+	HeaderOptionsPanel.c \
 	HostnameMeter.c \
-	htop.c \
 	IncSet.c \
 	InfoScreen.c \
 	ListItem.c \
 	LoadAverageMeter.c \
 	MainPanel.c \
 	MemoryMeter.c \
+	MemorySwapMeter.c \
 	Meter.c \
 	MetersPanel.c \
 	NetworkIOMeter.c \
@@ -58,12 +74,16 @@ myhtopsources = \
 	ProcessLocksScreen.c \
 	RichString.c \
 	ScreenManager.c \
+	ScreensPanel.c \
 	Settings.c \
 	SignalsPanel.c \
 	SwapMeter.c \
+	SysArchMeter.c \
 	TasksMeter.c \
 	TraceScreen.c \
 	UptimeMeter.c \
+	FreqMeter.c \
+	TempMeter.c \
 	UsersTable.c \
 	Vector.c \
 	XUtils.c
@@ -81,16 +101,21 @@ myhtopheaders = \
 	ClockMeter.h \
 	ColorsPanel.h \
 	ColumnsPanel.h \
+	CommandLine.h \
 	CommandScreen.h \
 	Compat.h \
 	DateMeter.h \
 	DateTimeMeter.h \
 	DiskIOMeter.h \
 	DisplayOptionsPanel.h \
+	DynamicColumn.h \
+	DynamicMeter.h \
 	EnvScreen.h \
 	FunctionBar.h \
 	Hashtable.h \
 	Header.h \
+	HeaderLayout.h \
+	HeaderOptionsPanel.h \
 	HostnameMeter.h \
 	IncSet.h \
 	InfoScreen.h \
@@ -99,6 +124,7 @@ myhtopheaders = \
 	Macros.h \
 	MainPanel.h \
 	MemoryMeter.h \
+	MemorySwapMeter.h \
 	Meter.h \
 	MetersPanel.h \
 	NetworkIOMeter.h \
@@ -112,12 +138,16 @@ myhtopheaders = \
 	ProvideCurses.h \
 	RichString.h \
 	ScreenManager.h \
+	ScreensPanel.h \
 	Settings.h \
 	SignalsPanel.h \
 	SwapMeter.h \
+	SysArchMeter.h \
 	TasksMeter.h \
 	TraceScreen.h \
 	UptimeMeter.h \
+	FreqMeter.h \
+	TempMeter.h \
 	UsersTable.h \
 	Vector.h \
 	XUtils.h
@@ -126,6 +156,11 @@ myhtopheaders = \
 # -----
 
 linux_platform_headers = \
+	generic/gettime.h \
+	generic/hostname.h \
+	generic/uname.h \
+	linux/CGroupUtils.h \
+	linux/HugePageMeter.h \
 	linux/IOPriority.h \
 	linux/IOPriorityPanel.h \
 	linux/LibSensors.h \
@@ -142,9 +177,12 @@ linux_platform_headers = \
 	zfs/ZfsArcStats.h \
 	zfs/ZfsCompressedArcMeter.h
 
-if HTOP_LINUX
-AM_LDFLAGS += -rdynamic
-myhtopplatsources = \
+linux_platform_sources = \
+	generic/gettime.c \
+	generic/hostname.c \
+	generic/uname.c \
+	linux/CGroupUtils.c \
+	linux/HugePageMeter.c \
 	linux/IOPriorityPanel.c \
 	linux/LibSensors.c \
 	linux/LinuxProcess.c \
@@ -155,10 +193,12 @@ myhtopplatsources = \
 	linux/SystemdMeter.c \
 	linux/ZramMeter.c \
 	zfs/ZfsArcMeter.c \
-	zfs/ZfsArcStats.c \
 	zfs/ZfsCompressedArcMeter.c
 
+if HTOP_LINUX
+AM_LDFLAGS += -rdynamic
 myhtopplatheaders = $(linux_platform_headers)
+myhtopplatsources = $(linux_platform_sources)
 endif
 
 # FreeBSD
@@ -169,17 +209,28 @@ freebsd_platform_headers = \
 	freebsd/FreeBSDProcess.h \
 	freebsd/Platform.h \
 	freebsd/ProcessField.h \
+	generic/gettime.h \
+	generic/hostname.h \
+	generic/openzfs_sysctl.h \
+	generic/uname.h \
 	zfs/ZfsArcMeter.h \
-	zfs/ZfsCompressedArcMeter.h \
 	zfs/ZfsArcStats.h \
-	zfs/openzfs_sysctl.h
+	zfs/ZfsCompressedArcMeter.h
+
+freebsd_platform_sources = \
+	freebsd/Platform.c \
+	freebsd/FreeBSDProcessList.c \
+	freebsd/FreeBSDProcess.c \
+	generic/gettime.c \
+	generic/hostname.c \
+	generic/openzfs_sysctl.c \
+	generic/uname.c \
+	zfs/ZfsArcMeter.c \
+	zfs/ZfsCompressedArcMeter.c
 
 if HTOP_FREEBSD
-myhtopplatsources = freebsd/Platform.c freebsd/FreeBSDProcessList.c \
-freebsd/FreeBSDProcess.c \
-zfs/ZfsArcMeter.c zfs/ZfsCompressedArcMeter.c zfs/ZfsArcStats.c zfs/openzfs_sysctl.c
-
 myhtopplatheaders = $(freebsd_platform_headers)
+myhtopplatsources = $(freebsd_platform_sources)
 endif
 
 # DragonFlyBSD
@@ -189,31 +240,72 @@ dragonflybsd_platform_headers = \
 	dragonflybsd/DragonFlyBSDProcessList.h \
 	dragonflybsd/DragonFlyBSDProcess.h \
 	dragonflybsd/Platform.h \
-	dragonflybsd/ProcessField.h
+	dragonflybsd/ProcessField.h \
+	generic/gettime.h \
+	generic/hostname.h \
+	generic/uname.h
+
+dragonflybsd_platform_sources = \
+	dragonflybsd/DragonFlyBSDProcessList.c \
+	dragonflybsd/DragonFlyBSDProcess.c \
+	dragonflybsd/Platform.c \
+	generic/gettime.c \
+	generic/hostname.c \
+	generic/uname.c
 
 if HTOP_DRAGONFLYBSD
-myhtopplatsources = \
-	dragonflybsd/Platform.c \
-	dragonflybsd/DragonFlyBSDProcessList.c \
-	dragonflybsd/DragonFlyBSDProcess.c
-
 myhtopplatheaders = $(dragonflybsd_platform_headers)
+myhtopplatsources = $(dragonflybsd_platform_sources)
+endif
+
+# NetBSD
+# -------
+
+netbsd_platform_headers = \
+	generic/gettime.h \
+	generic/hostname.h \
+	generic/uname.h \
+	netbsd/Platform.h \
+	netbsd/ProcessField.h \
+	netbsd/NetBSDProcess.h \
+	netbsd/NetBSDProcessList.h
+
+netbsd_platform_sources = \
+	generic/gettime.c \
+	generic/hostname.c \
+	generic/uname.c \
+	netbsd/Platform.c \
+	netbsd/NetBSDProcess.c \
+	netbsd/NetBSDProcessList.c
+
+if HTOP_NETBSD
+myhtopplatheaders = $(netbsd_platform_headers)
+myhtopplatsources = $(netbsd_platform_sources)
 endif
 
 # OpenBSD
 # -------
 
 openbsd_platform_headers = \
+	generic/gettime.h \
+	generic/hostname.h \
+	generic/uname.h \
 	openbsd/OpenBSDProcessList.h \
 	openbsd/OpenBSDProcess.h \
 	openbsd/Platform.h \
 	openbsd/ProcessField.h
 
-if HTOP_OPENBSD
-myhtopplatsources = openbsd/Platform.c openbsd/OpenBSDProcessList.c \
-openbsd/OpenBSDProcess.c
+openbsd_platform_sources = \
+	generic/gettime.c \
+	generic/hostname.c \
+	generic/uname.c \
+	openbsd/OpenBSDProcessList.c \
+	openbsd/OpenBSDProcess.c \
+	openbsd/Platform.c
 
+if HTOP_OPENBSD
 myhtopplatheaders = $(openbsd_platform_headers)
+myhtopplatsources = $(openbsd_platform_sources)
 endif
 
 # Darwin
@@ -223,60 +315,124 @@ darwin_platform_headers = \
 	darwin/DarwinProcess.h \
 	darwin/DarwinProcessList.h \
 	darwin/Platform.h \
+	darwin/PlatformHelpers.h \
 	darwin/ProcessField.h \
+	generic/gettime.h \
+	generic/hostname.h \
+	generic/openzfs_sysctl.h \
+	generic/uname.h \
 	zfs/ZfsArcMeter.h \
-	zfs/ZfsCompressedArcMeter.h \
 	zfs/ZfsArcStats.h \
-	zfs/openzfs_sysctl.h
+	zfs/ZfsCompressedArcMeter.h
+
+darwin_platform_sources = \
+	darwin/Platform.c \
+	darwin/PlatformHelpers.c \
+	darwin/DarwinProcess.c \
+	darwin/DarwinProcessList.c \
+	generic/gettime.c \
+	generic/hostname.c \
+	generic/openzfs_sysctl.c \
+	generic/uname.c \
+	zfs/ZfsArcMeter.c \
+	zfs/ZfsCompressedArcMeter.c
 
 if HTOP_DARWIN
 AM_LDFLAGS += -framework IOKit -framework CoreFoundation
-myhtopplatsources = darwin/Platform.c darwin/DarwinProcess.c \
-darwin/DarwinProcessList.c \
-zfs/ZfsArcMeter.c zfs/ZfsCompressedArcMeter.c zfs/ZfsArcStats.c zfs/openzfs_sysctl.c
-
 myhtopplatheaders = $(darwin_platform_headers)
+myhtopplatsources = $(darwin_platform_sources)
 endif
 
 # Solaris
 # -------
 
 solaris_platform_headers = \
-	solaris/Platform.h \
+	generic/gettime.h \
+	generic/hostname.h \
+	generic/uname.h \
 	solaris/ProcessField.h \
+	solaris/Platform.h \
 	solaris/SolarisProcess.h \
 	solaris/SolarisProcessList.h \
 	zfs/ZfsArcMeter.h \
-	zfs/ZfsCompressedArcMeter.h \
-	zfs/ZfsArcStats.h
+	zfs/ZfsArcStats.h \
+	zfs/ZfsCompressedArcMeter.h
+
+solaris_platform_sources = \
+	generic/gettime.c \
+	generic/hostname.c \
+	generic/uname.c \
+	solaris/Platform.c \
+	solaris/SolarisProcess.c \
+	solaris/SolarisProcessList.c \
+	zfs/ZfsArcMeter.c \
+	zfs/ZfsCompressedArcMeter.c
 
 if HTOP_SOLARIS
-myhtopplatsources = solaris/Platform.c \
-solaris/SolarisProcess.c solaris/SolarisProcessList.c \
-zfs/ZfsArcMeter.c zfs/ZfsCompressedArcMeter.c zfs/ZfsArcStats.c
-
 myhtopplatheaders = $(solaris_platform_headers)
+myhtopplatsources = $(solaris_platform_sources)
+endif
+
+# Performance Co-Pilot (PCP)
+# --------------------------
+
+pcp_platform_headers = \
+	linux/PressureStallMeter.h \
+	linux/ZramMeter.h \
+	linux/ZramStats.h \
+	pcp/PCPDynamicColumn.h \
+	pcp/PCPDynamicMeter.h \
+	pcp/PCPMetric.h \
+	pcp/PCPProcess.h \
+	pcp/PCPProcessList.h \
+	pcp/Platform.h \
+	pcp/ProcessField.h \
+	zfs/ZfsArcMeter.h \
+	zfs/ZfsArcStats.h \
+	zfs/ZfsCompressedArcMeter.h
+
+pcp_platform_sources = \
+	linux/PressureStallMeter.c \
+	linux/ZramMeter.c \
+	pcp/PCPDynamicColumn.c \
+	pcp/PCPDynamicMeter.c \
+	pcp/PCPMetric.c \
+	pcp/PCPProcess.c \
+	pcp/PCPProcessList.c \
+	pcp/Platform.c \
+	zfs/ZfsArcMeter.c \
+	zfs/ZfsCompressedArcMeter.c
+
+if HTOP_PCP
+myhtopplatheaders = $(pcp_platform_headers)
+myhtopplatsources = $(pcp_platform_sources)
+pcp_htop_SOURCES  = $(myhtopplatprogram) $(myhtopheaders) $(myhtopplatheaders) $(myhtopsources) $(myhtopplatsources)
 endif
 
 # Unsupported
 # -----------
 
 unsupported_platform_headers = \
+	generic/gettime.h \
 	unsupported/Platform.h \
 	unsupported/ProcessField.h \
 	unsupported/UnsupportedProcess.h \
 	unsupported/UnsupportedProcessList.h
 
-if HTOP_UNSUPPORTED
-myhtopplatsources = unsupported/Platform.c \
-unsupported/UnsupportedProcess.c unsupported/UnsupportedProcessList.c
+unsupported_platform_sources = \
+	generic/gettime.c \
+	unsupported/Platform.c \
+	unsupported/UnsupportedProcess.c \
+	unsupported/UnsupportedProcessList.c
 
+if HTOP_UNSUPPORTED
+myhtopplatsources = $(unsupported_platform_sources)
 myhtopplatheaders = $(unsupported_platform_headers)
 endif
 
 # ----
 
-htop_SOURCES  = $(myhtopheaders) $(myhtopplatheaders) $(myhtopsources) $(myhtopplatsources)
+htop_SOURCES = $(myhtopplatprogram) $(myhtopheaders) $(myhtopplatheaders) $(myhtopsources) $(myhtopplatsources)
 nodist_htop_SOURCES = config.h
 
 target:
@@ -286,10 +442,10 @@ profile:
 	$(MAKE) all AM_CPPFLAGS="-pg -O2 -DNDEBUG"
 
 debug:
-	$(MAKE) all AM_CPPFLAGS="-ggdb -DDEBUG"
+	$(MAKE) all AM_CPPFLAGS="-ggdb3 -Og" CFLAGS="`printf ' %s ' "$(CFLAGS)"|sed -E 's#[[:space:]]-O[^[:space:]]+[[:space:]]# #g'` -ggdb3 -Og"
 
 coverage:
-	$(MAKE) all AM_CPPFLAGS="-fprofile-arcs -ftest-coverage -DDEBUG" AM_LDFLAGS="-lgcov"
+	$(MAKE) all AM_CPPFLAGS="-fprofile-arcs -ftest-coverage" AM_LDFLAGS="-lgcov"
 
 cppcheck:
 	cppcheck -q -v . --enable=all -DHAVE_OPENVZ

MemoryMeter.c

@@ -1,12 +1,15 @@
 /*
 htop - MemoryMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "MemoryMeter.h"
 
+#include <math.h>
+#include <stddef.h>
+
 #include "CRT.h"
 #include "Object.h"
 #include "Platform.h"
@@ -16,13 +19,23 @@ in the source distribution for its full text.
 static const int MemoryMeter_attributes[] = {
    MEMORY_USED,
    MEMORY_BUFFERS,
+   MEMORY_SHARED,
    MEMORY_CACHE
 };
 
-static void MemoryMeter_updateValues(Meter* this, char* buffer, size_t size) {
+static void MemoryMeter_updateValues(Meter* this) {
+   char* buffer = this->txtBuffer;
+   size_t size = sizeof(this->txtBuffer);
    int written;
+
+   /* shared and available memory are not supported on all platforms */
+   this->values[2] = NAN;
+   this->values[4] = NAN;
    Platform_setMemoryValues(this);
 
+   /* Do not print available memory in bar mode */
+   this->curItems = 4;
+
    written = Meter_humanUnit(buffer, this->values[0], size);
    METER_BUFFER_CHECK(buffer, size, written);
 
@@ -34,18 +47,36 @@ static void MemoryMeter_updateValues(Meter* this, char* buffer, size_t size) {
 static void MemoryMeter_display(const Object* cast, RichString* out) {
    char buffer[50];
    const Meter* this = (const Meter*)cast;
+
    RichString_writeAscii(out, CRT_colors[METER_TEXT], ":");
    Meter_humanUnit(buffer, this->total, sizeof(buffer));
    RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
+
    Meter_humanUnit(buffer, this->values[0], sizeof(buffer));
    RichString_appendAscii(out, CRT_colors[METER_TEXT], " used:");
    RichString_appendAscii(out, CRT_colors[MEMORY_USED], buffer);
+
    Meter_humanUnit(buffer, this->values[1], sizeof(buffer));
    RichString_appendAscii(out, CRT_colors[METER_TEXT], " buffers:");
    RichString_appendAscii(out, CRT_colors[MEMORY_BUFFERS_TEXT], buffer);
+
+   /* shared memory is not supported on all platforms */
+   if (!isnan(this->values[2])) {
       Meter_humanUnit(buffer, this->values[2], sizeof(buffer));
+      RichString_appendAscii(out, CRT_colors[METER_TEXT], " shared:");
+      RichString_appendAscii(out, CRT_colors[MEMORY_SHARED], buffer);
+   }
+
+   Meter_humanUnit(buffer, this->values[3], sizeof(buffer));
    RichString_appendAscii(out, CRT_colors[METER_TEXT], " cache:");
    RichString_appendAscii(out, CRT_colors[MEMORY_CACHE], buffer);
+
+   /* available memory is not supported on all platforms */
+   if (!isnan(this->values[4])) {
+      Meter_humanUnit(buffer, this->values[4], sizeof(buffer));
+      RichString_appendAscii(out, CRT_colors[METER_TEXT], " available:");
+      RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
+   }
 }
 
 const MeterClass MemoryMeter_class = {
@@ -56,7 +87,7 @@ const MeterClass MemoryMeter_class = {
    },
    .updateValues = MemoryMeter_updateValues,
    .defaultMode = BAR_METERMODE,
-   .maxItems = 3,
+   .maxItems = 5,
    .total = 100.0,
    .attributes = MemoryMeter_attributes,
    .name = "Memory",

MemoryMeter.h

@@ -3,12 +3,13 @@
 /*
 htop - MemoryMeter.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "Meter.h"
 
+
 extern const MeterClass MemoryMeter_class;
 
 #endif

MemorySwapMeter.c

@@ -0,0 +1,107 @@
+/*
+htop - MemorySwapMeter.c
+(C) 2021 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "MemorySwapMeter.h"
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#include "Macros.h"
+#include "MemoryMeter.h"
+#include "Object.h"
+#include "SwapMeter.h"
+#include "XUtils.h"
+
+
+typedef struct MemorySwapMeterData_ {
+   Meter* memoryMeter;
+   Meter* swapMeter;
+} MemorySwapMeterData;
+
+static void MemorySwapMeter_updateValues(Meter* this) {
+   MemorySwapMeterData* data = this->meterData;
+
+   Meter_updateValues(data->memoryMeter);
+   Meter_updateValues(data->swapMeter);
+}
+
+static void MemorySwapMeter_draw(Meter* this, int x, int y, int w) {
+   MemorySwapMeterData* data = this->meterData;
+
+   /* Use the same width for each sub meter to align with CPU meter */
+   const int colwidth = w / 2;
+   const int diff = w - colwidth * 2;
+
+   assert(data->memoryMeter->draw);
+   data->memoryMeter->draw(data->memoryMeter, x, y, colwidth);
+   assert(data->swapMeter->draw);
+   data->swapMeter->draw(data->swapMeter, x + colwidth + diff, y, colwidth);
+}
+
+static void MemorySwapMeter_init(Meter* this) {
+   MemorySwapMeterData* data = this->meterData;
+
+   if (!data) {
+      data = this->meterData = xMalloc(sizeof(MemorySwapMeterData));
+      data->memoryMeter = NULL;
+      data->swapMeter = NULL;
+   }
+
+   if (!data->memoryMeter)
+      data->memoryMeter = Meter_new(this->pl, 0, (const MeterClass*) Class(MemoryMeter));
+   if (!data->swapMeter)
+      data->swapMeter = Meter_new(this->pl, 0, (const MeterClass*) Class(SwapMeter));
+
+   if (Meter_initFn(data->memoryMeter))
+      Meter_init(data->memoryMeter);
+   if (Meter_initFn(data->swapMeter))
+      Meter_init(data->swapMeter);
+
+   if (this->mode == 0)
+      this->mode = BAR_METERMODE;
+
+   this->h = MAXIMUM(Meter_modes[data->memoryMeter->mode]->h, Meter_modes[data->swapMeter->mode]->h);
+}
+
+static void MemorySwapMeter_updateMode(Meter* this, int mode) {
+   MemorySwapMeterData* data = this->meterData;
+
+   this->mode = mode;
+
+   Meter_setMode(data->memoryMeter, mode);
+   Meter_setMode(data->swapMeter, mode);
+
+   this->h = MAXIMUM(Meter_modes[data->memoryMeter->mode]->h, Meter_modes[data->swapMeter->mode]->h);
+}
+
+static void MemorySwapMeter_done(Meter* this) {
+   MemorySwapMeterData* data = this->meterData;
+
+   Meter_delete((Object*)data->swapMeter);
+   Meter_delete((Object*)data->memoryMeter);
+
+   free(data);
+}
+
+const MeterClass MemorySwapMeter_class = {
+   .super = {
+      .extends = Class(Meter),
+      .delete = Meter_delete,
+   },
+   .updateValues = MemorySwapMeter_updateValues,
+   .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
+   .name = "MemorySwap",
+   .uiName = "Memory & Swap",
+   .description = "Combined memory and swap usage",
+   .caption = "M&S",
+   .draw = MemorySwapMeter_draw,
+   .init = MemorySwapMeter_init,
+   .updateMode = MemorySwapMeter_updateMode,
+   .done = MemorySwapMeter_done
+};

MemorySwapMeter.h

@@ -0,0 +1,15 @@
+#ifndef HEADER_MemorySwapMeter
+#define HEADER_MemorySwapMeter
+/*
+htop - MemorySwapMeter.h
+(C) 2021 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "Meter.h"
+
+
+extern const MeterClass MemorySwapMeter_class;
+
+#endif

Meter.c

@@ -1,7 +1,7 @@
 /*
 htop - Meter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -32,13 +32,14 @@ const MeterClass Meter_class = {
    }
 };
 
-Meter* Meter_new(const struct ProcessList_* pl, int param, const MeterClass* type) {
+Meter* Meter_new(const struct ProcessList_* pl, unsigned int param, const MeterClass* type) {
    Meter* this = xCalloc(1, sizeof(Meter));
    Object_setClass(this, type);
    this->h = 1;
    this->param = param;
    this->pl = pl;
    this->curItems = type->maxItems;
+   this->curAttributes = NULL;
    this->values = type->maxItems ? xCalloc(type->maxItems, sizeof(double)) : NULL;
    this->total = type->total;
    this->caption = xStrdup(type->caption);
@@ -92,15 +93,14 @@ void Meter_delete(Object* cast) {
 }
 
 void Meter_setCaption(Meter* this, const char* caption) {
-   free(this->caption);
-   this->caption = xStrdup(caption);
+   free_and_xStrdup(&this->caption, caption);
 }
 
-static inline void Meter_displayBuffer(const Meter* this, const char* buffer, RichString* out) {
+static inline void Meter_displayBuffer(const Meter* this, RichString* out) {
    if (Object_displayFn(this)) {
       Object_display(this, out);
    } else {
-      RichString_writeWide(out, CRT_colors[Meter_attributes(this)[0]], buffer);
+      RichString_writeWide(out, CRT_colors[Meter_attributes(this)[0]], this->txtBuffer);
    }
 }
 
@@ -131,21 +131,20 @@ void Meter_setMode(Meter* this, int modeIndex) {
    this->mode = modeIndex;
 }
 
-ListItem* Meter_toListItem(Meter* this, bool moving) {
+ListItem* Meter_toListItem(const Meter* this, bool moving) {
    char mode[20];
    if (this->mode) {
       xSnprintf(mode, sizeof(mode), " [%s]", Meter_modes[this->mode]->uiName);
    } else {
       mode[0] = '\0';
    }
-   char number[10];
-   if (this->param > 0) {
-      xSnprintf(number, sizeof(number), " %d", this->param);
-   } else {
-      number[0] = '\0';
-   }
+   char name[32];
+   if (Meter_getUiNameFn(this))
+      Meter_getUiName(this, name, sizeof(name));
+   else
+      xSnprintf(name, sizeof(name), "%s", Meter_uiName(this));
    char buffer[50];
-   xSnprintf(buffer, sizeof(buffer), "%s%s%s", Meter_uiName(this), number, mode);
+   xSnprintf(buffer, sizeof(buffer), "%s%s", name, mode);
    ListItem* li = ListItem_new(buffer, 0);
    li->moving = moving;
    return li;
@@ -154,23 +153,21 @@ ListItem* Meter_toListItem(Meter* this, bool moving) {
 /* ---------- TextMeterMode ---------- */
 
 static void TextMeterMode_draw(Meter* this, int x, int y, int w) {
-   char buffer[METER_BUFFER_LEN];
-   Meter_updateValues(this, buffer, sizeof(buffer));
-
+   const char* caption = Meter_getCaption(this);
    attrset(CRT_colors[METER_TEXT]);
-   mvaddnstr(y, x, this->caption, w - 1);
+   mvaddnstr(y, x, caption, w);
    attrset(CRT_colors[RESET_COLOR]);
 
-   int captionLen = strlen(this->caption);
+   int captionLen = strlen(caption);
    x += captionLen;
    w -= captionLen;
    if (w <= 0)
       return;
 
    RichString_begin(out);
-   Meter_displayBuffer(this, buffer, &out);
-   RichString_printoffnVal(out, y, x, 0, w - 1);
-   RichString_end(out);
+   Meter_displayBuffer(this, &out);
+   RichString_printoffnVal(out, y, x, 0, w);
+   RichString_delete(&out);
 }
 
 /* ---------- BarMeterMode ---------- */
@@ -178,21 +175,19 @@ static void TextMeterMode_draw(Meter* this, int x, int y, int w) {
 static const char BarMeterMode_characters[] = "|#*@$%&.";
 
 static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
-   char buffer[METER_BUFFER_LEN];
-   Meter_updateValues(this, buffer, sizeof(buffer));
-
-   w -= 2;
+   const char* caption = Meter_getCaption(this);
    attrset(CRT_colors[METER_TEXT]);
    int captionLen = 3;
-   mvaddnstr(y, x, this->caption, captionLen);
+   mvaddnstr(y, x, caption, captionLen);
    x += captionLen;
    w -= captionLen;
    attrset(CRT_colors[BAR_BORDER]);
    mvaddch(y, x, '[');
+   w--;
    mvaddch(y, x + MAXIMUM(w, 0), ']');
+   w--;
    attrset(CRT_colors[RESET_COLOR]);
 
-   w--;
    x++;
 
    if (w < 1)
@@ -201,8 +196,8 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
    // The text in the bar is right aligned;
    // Pad with maximal spaces and then calculate needed starting position offset
    RichString_begin(bar);
-   RichString_appendChr(&bar, ' ', w);
-   RichString_appendWide(&bar, 0, buffer);
+   RichString_appendChr(&bar, 0, ' ', w);
+   RichString_appendWide(&bar, 0, this->txtBuffer);
    int startPos = RichString_sizeVal(bar) - w;
    if (startPos > w) {
       // Text is too large for bar
@@ -216,7 +211,7 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
          }
       }
 
-      // If still to large, print the start not the end
+      // If still too large, print the start not the end
       startPos = MINIMUM(startPos, w);
    }
    assert(startPos >= 0);
@@ -252,17 +247,18 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
    // ...then print the buffer.
    offset = 0;
    for (uint8_t i = 0; i < this->curItems; i++) {
-      RichString_setAttrn(&bar, CRT_colors[Meter_attributes(this)[i]], startPos + offset, startPos + offset + blockSizes[i] - 1);
+      int attr = this->curAttributes ? this->curAttributes[i] : Meter_attributes(this)[i];
+      RichString_setAttrn(&bar, CRT_colors[attr], startPos + offset, blockSizes[i]);
       RichString_printoffnVal(bar, y, x + offset, startPos + offset, MINIMUM(blockSizes[i], w - offset));
       offset += blockSizes[i];
       offset = CLAMP(offset, 0, w);
    }
    if (offset < w) {
-      RichString_setAttrn(&bar, CRT_colors[BAR_SHADOW], startPos + offset, startPos + w - 1);
+      RichString_setAttrn(&bar, CRT_colors[BAR_SHADOW], startPos + offset, w - offset);
       RichString_printoffnVal(bar, y, x + offset, startPos + offset, w - offset);
    }
 
-   RichString_end(bar);
+   RichString_delete(&bar);
 
    move(y, x + w + 1);
    attrset(CRT_colors[RESET_COLOR]);
@@ -290,17 +286,17 @@ static const char* const GraphMeterMode_dotsAscii[] = {
    /*20*/":", /*21*/":", /*22*/":"
 };
 
-static const char* const* GraphMeterMode_dots;
-static int GraphMeterMode_pixPerRow;
-
 static void GraphMeterMode_draw(Meter* this, int x, int y, int w) {
+   const ProcessList* pl = this->pl;
 
    if (!this->drawData) {
       this->drawData = xCalloc(1, sizeof(GraphData));
    }
    GraphData* data = this->drawData;
-   const int nValues = METER_BUFFER_LEN;
+   const int nValues = METER_GRAPHDATA_SIZE;
 
+   const char* const* GraphMeterMode_dots;
+   int GraphMeterMode_pixPerRow;
 #ifdef HAVE_LIBNCURSESW
    if (CRT_utf8) {
       GraphMeterMode_dots = GraphMeterMode_dotsUtf8;
@@ -312,41 +308,38 @@ static void GraphMeterMode_draw(Meter* this, int x, int y, int w) {
       GraphMeterMode_pixPerRow = PIXPERROW_ASCII;
    }
 
+   const char* caption = Meter_getCaption(this);
    attrset(CRT_colors[METER_TEXT]);
    int captionLen = 3;
-   mvaddnstr(y, x, this->caption, captionLen);
+   mvaddnstr(y, x, caption, captionLen);
    x += captionLen;
    w -= captionLen;
 
-   struct timeval now;
-   gettimeofday(&now, NULL);
-   if (!timercmp(&now, &(data->time), <)) {
+   if (!timercmp(&pl->realtime, &(data->time), <)) {
       int globalDelay = this->pl->settings->delay;
-      struct timeval delay = { .tv_sec = globalDelay / 10, .tv_usec = (globalDelay - ((globalDelay / 10) * 10)) * 100000 };
-      timeradd(&now, &delay, &(data->time));
+      struct timeval delay = { .tv_sec = globalDelay / 10, .tv_usec = (globalDelay % 10) * 100000L };
+      timeradd(&pl->realtime, &delay, &(data->time));
 
       for (int i = 0; i < nValues - 1; i++)
          data->values[i] = data->values[i + 1];
 
-      char buffer[METER_BUFFER_LEN];
-      Meter_updateValues(this, buffer, sizeof(buffer));
-
       double value = 0.0;
       for (uint8_t i = 0; i < this->curItems; i++)
          value += this->values[i];
-      value /= this->total;
       data->values[nValues - 1] = value;
    }
 
-   int i = nValues - (w * 2) + 2, k = 0;
+   int i = nValues - (w * 2), k = 0;
    if (i < 0) {
       k = -i / 2;
       i = 0;
    }
    for (; i < nValues - 1; i += 2, k++) {
       int pix = GraphMeterMode_pixPerRow * GRAPH_HEIGHT;
-      int v1 = CLAMP((int) lround(data->values[i] * pix), 1, pix);
-      int v2 = CLAMP((int) lround(data->values[i + 1] * pix), 1, pix);
+      if (this->total < 1)
+         this->total = 1;
+      int v1 = CLAMP((int) lround(data->values[i] / this->total * pix), 1, pix);
+      int v2 = CLAMP((int) lround(data->values[i + 1] / this->total * pix), 1, pix);
 
       int colorIdx = GRAPH_1;
       for (int line = 0; line < GRAPH_HEIGHT; line++) {
@@ -387,8 +380,6 @@ static void LEDMeterMode_drawDigit(int x, int y, int n) {
 }
 
 static void LEDMeterMode_draw(Meter* this, int x, int y, int w) {
-   (void) w;
-
 #ifdef HAVE_LIBNCURSESW
    if (CRT_utf8)
       LEDMeterMode_digits = LEDMeterMode_digitsUtf8;
@@ -396,11 +387,8 @@ static void LEDMeterMode_draw(Meter* this, int x, int y, int w) {
 #endif
       LEDMeterMode_digits = LEDMeterMode_digitsAscii;
 
-   char buffer[METER_BUFFER_LEN];
-   Meter_updateValues(this, buffer, sizeof(buffer));
-
    RichString_begin(out);
-   Meter_displayBuffer(this, buffer, &out);
+   Meter_displayBuffer(this, &out);
 
    int yText =
 #ifdef HAVE_LIBNCURSESW
@@ -408,21 +396,32 @@ static void LEDMeterMode_draw(Meter* this, int x, int y, int w) {
 #endif
       y + 2;
    attrset(CRT_colors[LED_COLOR]);
-   mvaddstr(yText, x, this->caption);
-   int xx = x + strlen(this->caption);
+   const char* caption = Meter_getCaption(this);
+   mvaddstr(yText, x, caption);
+   int xx = x + strlen(caption);
    int len = RichString_sizeVal(out);
    for (int i = 0; i < len; i++) {
       int c = RichString_getCharVal(out, i);
       if (c >= '0' && c <= '9') {
-         LEDMeterMode_drawDigit(xx, y, c - 48);
+         if (xx - x + 4 > w)
+            break;
+
+         LEDMeterMode_drawDigit(xx, y, c - '0');
          xx += 4;
       } else {
+         if (xx - x + 1 > w)
+            break;
+#ifdef HAVE_LIBNCURSESW
+         const cchar_t wc = { .chars = { c, '\0' }, .attr = 0 }; /* use LED_COLOR from attrset() */
+         mvadd_wch(yText, xx, &wc);
+#else
          mvaddch(yText, xx, c);
+#endif
          xx += 1;
       }
    }
    attrset(CRT_colors[RESET_COLOR]);
-   RichString_end(out);
+   RichString_delete(&out);
 }
 
 static MeterMode BarMeterMode = {
@@ -460,14 +459,11 @@ const MeterMode* const Meter_modes[] = {
 
 /* Blank meter */
 
-static void BlankMeter_updateValues(ATTR_UNUSED Meter* this, char* buffer, size_t size) {
-   if (size > 0) {
-      *buffer = 0;
-   }
+static void BlankMeter_updateValues(Meter* this) {
+   this->txtBuffer[0] = '\0';
 }
 
-static void BlankMeter_display(ATTR_UNUSED const Object* cast, RichString* out) {
-   RichString_prune(out);
+static void BlankMeter_display(ATTR_UNUSED const Object* cast, ATTR_UNUSED RichString* out) {
 }
 
 static const int BlankMeter_attributes[] = {

Meter.h

@@ -3,13 +3,14 @@
 /*
 htop - Meter.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "config.h" // IWYU pragma: keep
 
 #include <stdbool.h>
+#include <stddef.h>
 #include <stdint.h>
 #include <sys/time.h>
 
@@ -18,7 +19,8 @@ in the source distribution for its full text.
 #include "ProcessList.h"
 
 
-#define METER_BUFFER_LEN 256
+#define METER_TXTBUFFER_LEN 256
+#define METER_GRAPHDATA_SIZE 256
 
 #define METER_BUFFER_CHECK(buffer, size, written)          \
    do {                                                    \
@@ -49,16 +51,20 @@ typedef struct Meter_ Meter;
 typedef void(*Meter_Init)(Meter*);
 typedef void(*Meter_Done)(Meter*);
 typedef void(*Meter_UpdateMode)(Meter*, int);
-typedef void(*Meter_UpdateValues)(Meter*, char*, size_t);
+typedef void(*Meter_UpdateValues)(Meter*);
 typedef void(*Meter_Draw)(Meter*, int, int, int);
+typedef const char* (*Meter_GetCaption)(const Meter*);
+typedef void(*Meter_GetUiName)(const Meter*, char*, size_t);
 
 typedef struct MeterClass_ {
    const ObjectClass super;
    const Meter_Init init;
    const Meter_Done done;
    const Meter_UpdateMode updateMode;
-   const Meter_Draw draw;
    const Meter_UpdateValues updateValues;
+   const Meter_Draw draw;
+   const Meter_GetCaption getCaption;
+   const Meter_GetUiName getUiName;
    const int defaultMode;
    const double total;
    const int* const attributes;
@@ -67,6 +73,7 @@ typedef struct MeterClass_ {
    const char* const caption;              /* prefix in the actual header */
    const char* const description;          /* optional meter description in header setup menu */
    const uint8_t maxItems;
+   const bool isMultiColumn;               /* whether the meter draws multiple sub-columns (defaults to false) */
 } MeterClass;
 
 #define As_Meter(this_)                ((const MeterClass*)((this_)->super.klass))
@@ -77,16 +84,20 @@ typedef struct MeterClass_ {
 #define Meter_updateMode(this_, m_)    As_Meter(this_)->updateMode((Meter*)(this_), m_)
 #define Meter_drawFn(this_)            As_Meter(this_)->draw
 #define Meter_doneFn(this_)            As_Meter(this_)->done
-#define Meter_updateValues(this_, buf_, sz_) \
-                                       As_Meter(this_)->updateValues((Meter*)(this_), buf_, sz_)
+#define Meter_updateValues(this_)      As_Meter(this_)->updateValues((Meter*)(this_))
+#define Meter_getUiNameFn(this_)       As_Meter(this_)->getUiName
+#define Meter_getUiName(this_,n_,l_)   As_Meter(this_)->getUiName((const Meter*)(this_),n_,l_)
+#define Meter_getCaptionFn(this_)      As_Meter(this_)->getCaption
+#define Meter_getCaption(this_)        (Meter_getCaptionFn(this_) ? As_Meter(this_)->getCaption((const Meter*)(this_)) : (this_)->caption)
 #define Meter_defaultMode(this_)       As_Meter(this_)->defaultMode
 #define Meter_attributes(this_)        As_Meter(this_)->attributes
 #define Meter_name(this_)              As_Meter(this_)->name
 #define Meter_uiName(this_)            As_Meter(this_)->uiName
+#define Meter_isMultiColumn(this_)     As_Meter(this_)->isMultiColumn
 
 typedef struct GraphData_ {
    struct timeval time;
-   double values[METER_BUFFER_LEN];
+   double values[METER_GRAPHDATA_SIZE];
 } GraphData;
 
 struct Meter_ {
@@ -95,11 +106,14 @@ struct Meter_ {
 
    char* caption;
    int mode;
-   int param;
+   unsigned int param;
    GraphData* drawData;
    int h;
+   int columnWidthCount;      /**< only used internally by the Header */
    const ProcessList* pl;
    uint8_t curItems;
+   const int* curAttributes;
+   char txtBuffer[METER_TXTBUFFER_LEN];
    double* values;
    double total;
    void* meterData;
@@ -120,9 +134,16 @@ typedef enum {
    LAST_METERMODE
 } MeterModeId;
 
+typedef enum {
+   RATESTATUS_DATA,
+   RATESTATUS_INIT,
+   RATESTATUS_NODATA,
+   RATESTATUS_STALE
+} MeterRateStatus;
+
 extern const MeterClass Meter_class;
 
-Meter* Meter_new(const ProcessList* pl, int param, const MeterClass* type);
+Meter* Meter_new(const ProcessList* pl, unsigned int param, const MeterClass* type);
 
 int Meter_humanUnit(char* buffer, unsigned long int value, size_t size);
 
@@ -132,7 +153,7 @@ void Meter_setCaption(Meter* this, const char* caption);
 
 void Meter_setMode(Meter* this, int modeIndex);
 
-ListItem* Meter_toListItem(Meter* this, bool moving);
+ListItem* Meter_toListItem(const Meter* this, bool moving);
 
 extern const MeterMode* const Meter_modes[];
 

MetersPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - MetersPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -184,9 +184,9 @@ static HandlerResult MetersPanel_eventHandler(Panel* super, int ch) {
    if (result == HANDLED || sideMove) {
       Header* header = this->scr->header;
       this->settings->changed = true;
+      this->settings->lastUpdate++;
       Header_calculateHeight(header);
-      Header_draw(header);
-      ScreenManager_resize(this->scr, this->scr->x1, header->height, this->scr->x2, this->scr->y2);
+      ScreenManager_resize(this->scr);
    }
    return result;
 }
@@ -216,7 +216,7 @@ MetersPanel* MetersPanel_new(Settings* settings, const char* header, Vector* met
    this->leftNeighbor = NULL;
    Panel_setHeader(super, header);
    for (int i = 0; i < Vector_size(meters); i++) {
-      Meter* meter = (Meter*) Vector_get(meters, i);
+      const Meter* meter = (const Meter*) Vector_get(meters, i);
       Panel_add(super, (Object*) Meter_toListItem(meter, false));
    }
    return this;

MetersPanel.h

@@ -3,7 +3,7 @@
 /*
 htop - MetersPanel.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

NetworkIOMeter.c

@@ -1,13 +1,15 @@
 #include "NetworkIOMeter.h"
 
 #include <stdbool.h>
-#include <stddef.h>
-#include <sys/time.h>
+#include <stdint.h>
 
 #include "CRT.h"
 #include "Macros.h"
+#include "Meter.h"
 #include "Object.h"
 #include "Platform.h"
+#include "Process.h"
+#include "ProcessList.h"
 #include "RichString.h"
 #include "XUtils.h"
 
@@ -17,82 +19,119 @@ static const int NetworkIOMeter_attributes[] = {
    METER_VALUE_IOWRITE,
 };
 
-static bool hasData = false;
+static MeterRateStatus status = RATESTATUS_INIT;
+static uint32_t cached_rxb_diff;
+static uint32_t cached_rxp_diff;
+static uint32_t cached_txb_diff;
+static uint32_t cached_txp_diff;
 
-static unsigned long int cached_rxb_diff = 0;
-static unsigned long int cached_rxp_diff = 0;
-static unsigned long int cached_txb_diff = 0;
-static unsigned long int cached_txp_diff = 0;
+static void NetworkIOMeter_updateValues(Meter* this) {
+   const ProcessList* pl = this->pl;
+   static uint64_t cached_last_update = 0;
 
-static void NetworkIOMeter_updateValues(ATTR_UNUSED Meter* this, char* buffer, size_t len) {
-   static unsigned long long int cached_last_update = 0;
+   uint64_t passedTimeInMs = pl->realtimeMs - cached_last_update;
 
-   struct timeval tv;
-   gettimeofday(&tv, NULL);
-   unsigned long long int timeInMilliSeconds = (unsigned long long int)tv.tv_sec * 1000 + (unsigned long long int)tv.tv_usec / 1000;
-   unsigned long long int passedTimeInMs = timeInMilliSeconds - cached_last_update;
-
-   /* update only every 500ms */
+   /* update only every 500ms to have a sane span for rate calculation */
    if (passedTimeInMs > 500) {
-      static unsigned long int cached_rxb_total = 0;
-      static unsigned long int cached_rxp_total = 0;
-      static unsigned long int cached_txb_total = 0;
-      static unsigned long int cached_txp_total = 0;
+      static uint64_t cached_rxb_total;
+      static uint64_t cached_rxp_total;
+      static uint64_t cached_txb_total;
+      static uint64_t cached_txp_total;
+      uint64_t diff;
 
-      cached_last_update = timeInMilliSeconds;
+      NetworkIOData data;
+      if (!Platform_getNetworkIO(&data)) {
+         status = RATESTATUS_NODATA;
+      } else if (cached_last_update == 0) {
+         status = RATESTATUS_INIT;
+      } else if (passedTimeInMs > 30000) {
+         status = RATESTATUS_STALE;
+      } else {
+         status = RATESTATUS_DATA;
+      }
 
-      unsigned long int bytesReceived, packetsReceived, bytesTransmitted, packetsTransmitted;
+      cached_last_update = pl->realtimeMs;
 
-      hasData = Platform_getNetworkIO(&bytesReceived, &packetsReceived, &bytesTransmitted, &packetsTransmitted);
-      if (!hasData) {
-         xSnprintf(buffer, len, "no data");
+      if (status == RATESTATUS_NODATA) {
+         xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "no data");
          return;
       }
 
-      if (bytesReceived > cached_rxb_total) {
-         cached_rxb_diff = (bytesReceived - cached_rxb_total) / 1024; /* Meter_humanUnit() expects unit in kilo */
-         cached_rxb_diff = 1000.0 * cached_rxb_diff / passedTimeInMs; /* convert to per second */
+      if (data.bytesReceived > cached_rxb_total) {
+         diff = data.bytesReceived - cached_rxb_total;
+         diff /= ONE_K; /* Meter_humanUnit() expects unit in kilo */
+         diff = (1000 * diff) / passedTimeInMs; /* convert to per second */
+         cached_rxb_diff = (uint32_t)diff;
       } else {
          cached_rxb_diff = 0;
       }
-      cached_rxb_total = bytesReceived;
+      cached_rxb_total = data.bytesReceived;
 
-      if (packetsReceived > cached_rxp_total) {
-         cached_rxp_diff = packetsReceived - cached_rxp_total;
+      if (data.packetsReceived > cached_rxp_total) {
+         diff = data.packetsReceived - cached_rxp_total;
+         cached_rxp_diff = (uint32_t)diff;
       } else {
          cached_rxp_diff = 0;
       }
-      cached_rxp_total = packetsReceived;
+      cached_rxp_total = data.packetsReceived;
 
-      if (bytesTransmitted > cached_txb_total) {
-         cached_txb_diff = (bytesTransmitted - cached_txb_total) / 1024; /* Meter_humanUnit() expects unit in kilo */
-         cached_txb_diff = 1000.0 * cached_txb_diff / passedTimeInMs; /* convert to per second */
+      if (data.bytesTransmitted > cached_txb_total) {
+         diff = data.bytesTransmitted - cached_txb_total;
+         diff /= ONE_K; /* Meter_humanUnit() expects unit in kilo */
+         diff = (1000 * diff) / passedTimeInMs; /* convert to per second */
+         cached_txb_diff = (uint32_t)diff;
       } else {
          cached_txb_diff = 0;
       }
-      cached_txb_total = bytesTransmitted;
+      cached_txb_total = data.bytesTransmitted;
 
-      if (packetsTransmitted > cached_txp_total) {
-         cached_txp_diff = packetsTransmitted - cached_txp_total;
+      if (data.packetsTransmitted > cached_txp_total) {
+         diff = data.packetsTransmitted - cached_txp_total;
+         cached_txp_diff = (uint32_t)diff;
       } else {
          cached_txp_diff = 0;
       }
-      cached_txp_total = packetsTransmitted;
+      cached_txp_total = data.packetsTransmitted;
+   }
+
+   if (status == RATESTATUS_INIT) {
+      xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "init");
+      return;
+   }
+   if (status == RATESTATUS_STALE) {
+      xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "stale");
+      return;
+   }
+
+   this->values[0] = cached_rxb_diff;
+   this->values[1] = cached_txb_diff;
+   if (cached_rxb_diff + cached_txb_diff > this->total) {
+      this->total = cached_rxb_diff + cached_txb_diff;
    }
 
    char bufferBytesReceived[12], bufferBytesTransmitted[12];
    Meter_humanUnit(bufferBytesReceived, cached_rxb_diff, sizeof(bufferBytesReceived));
    Meter_humanUnit(bufferBytesTransmitted, cached_txb_diff, sizeof(bufferBytesTransmitted));
-   xSnprintf(buffer, len, "rx:%siB/s tx:%siB/s", bufferBytesReceived, bufferBytesTransmitted);
+   xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "rx:%siB/s tx:%siB/s", bufferBytesReceived, bufferBytesTransmitted);
 }
 
 static void NetworkIOMeter_display(ATTR_UNUSED const Object* cast, RichString* out) {
-   if (!hasData) {
+   switch (status) {
+   case RATESTATUS_NODATA:
       RichString_writeAscii(out, CRT_colors[METER_VALUE_ERROR], "no data");
       return;
+   case RATESTATUS_INIT:
+      RichString_writeAscii(out, CRT_colors[METER_VALUE], "initializing...");
+      return;
+   case RATESTATUS_STALE:
+      RichString_writeAscii(out, CRT_colors[METER_VALUE_WARN], "stale data");
+      return;
+   case RATESTATUS_DATA:
+      break;
    }
 
    char buffer[64];
+   int len;
 
    RichString_writeAscii(out, CRT_colors[METER_TEXT], "rx: ");
    Meter_humanUnit(buffer, cached_rxb_diff, sizeof(buffer));
@@ -104,8 +143,8 @@ static void NetworkIOMeter_display(ATTR_UNUSED const Object* cast, RichString* o
    RichString_appendAscii(out, CRT_colors[METER_VALUE_IOWRITE], buffer);
    RichString_appendAscii(out, CRT_colors[METER_VALUE_IOWRITE], "iB/s");
 
-   xSnprintf(buffer, sizeof(buffer), " (%lu/%lu packets) ", cached_rxp_diff, cached_txp_diff);
-   RichString_appendAscii(out, CRT_colors[METER_TEXT], buffer);
+   len = xSnprintf(buffer, sizeof(buffer), " (%u/%u packets) ", cached_rxp_diff, cached_txp_diff);
+   RichString_appendnAscii(out, CRT_colors[METER_TEXT], buffer, len);
 }
 
 const MeterClass NetworkIOMeter_class = {
@@ -116,7 +155,7 @@ const MeterClass NetworkIOMeter_class = {
    },
    .updateValues = NetworkIOMeter_updateValues,
    .defaultMode = TEXT_METERMODE,
-   .maxItems = 0,
+   .maxItems = 2,
    .total = 100.0,
    .attributes = NetworkIOMeter_attributes,
    .name = "NetworkIO",

NetworkIOMeter.h

@@ -3,6 +3,14 @@
 
 #include "Meter.h"
 
+
+typedef struct NetworkIOData_ {
+   uint64_t bytesReceived;
+   uint64_t packetsReceived;
+   uint64_t bytesTransmitted;
+   uint64_t packetsTransmitted;
+} NetworkIOData;
+
 extern const MeterClass NetworkIOMeter_class;
 
 #endif /* HEADER_NetworkIOMeter */

Object.c

@@ -2,7 +2,7 @@
 htop - Object.c
 (C) 2004-2012 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -15,8 +15,6 @@ const ObjectClass Object_class = {
    .extends = NULL
 };
 
-#ifndef NDEBUG
-
 bool Object_isA(const Object* o, const ObjectClass* klass) {
    if (!o)
       return false;
@@ -29,5 +27,3 @@ bool Object_isA(const Object* o, const ObjectClass* klass) {
 
    return false;
 }
-
-#endif /* NDEBUG */

Object.h

@@ -4,27 +4,24 @@
 htop - Object.h
 (C) 2004-2012 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "config.h" // IWYU pragma: keep
 
 #include <assert.h>
+#include <stdbool.h>
 
 #include "RichString.h"
 #include "XUtils.h" // IWYU pragma: keep
 
-#ifndef NDEBUG
-#include <stdbool.h>
-#endif
-
 
 struct Object_;
 typedef struct Object_ Object;
 
 typedef void(*Object_Display)(const Object*, RichString*);
-typedef long(*Object_Compare)(const void*, const void*);
+typedef int(*Object_Compare)(const void*, const void*);
 typedef void(*Object_Delete)(Object*);
 
 #define Object_getClass(obj_)         ((const Object*)(obj_))->klass
@@ -57,10 +54,6 @@ typedef union {
 
 extern const ObjectClass Object_class;
 
-#ifndef NDEBUG
-
 bool Object_isA(const Object* o, const ObjectClass* klass);
 
-#endif /* NDEBUG */
-
 #endif

OpenFilesScreen.c

@@ -1,7 +1,7 @@
 /*
 htop - OpenFilesScreen.c
 (C) 2005-2006 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -9,13 +9,16 @@ in the source distribution for its full text.
 
 #include "OpenFilesScreen.h"
 
+#include <errno.h>
 #include <fcntl.h>
+#include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <sys/stat.h>
 
 #include "Macros.h"
 #include "Panel.h"
@@ -25,7 +28,7 @@ in the source distribution for its full text.
 
 
 typedef struct OpenFiles_Data_ {
-   char* data[7];
+   char* data[8];
 } OpenFiles_Data;
 
 typedef struct OpenFiles_ProcessData_ {
@@ -55,6 +58,8 @@ static size_t getIndexForType(char type) {
       return 5;
    case 't':
       return 6;
+   case 'o':
+      return 7;
    }
 
    /* should never reach here */
@@ -74,7 +79,7 @@ OpenFilesScreen* OpenFilesScreen_new(const Process* process) {
    } else {
       this->pid = process->pid;
    }
-   return (OpenFilesScreen*) InfoScreen_init(&this->super, process, NULL, LINES - 3, "   FD TYPE    MODE DEVICE           SIZE       NODE  NAME");
+   return (OpenFilesScreen*) InfoScreen_init(&this->super, process, NULL, LINES - 2, "   FD TYPE    MODE DEVICE           SIZE     OFFSET       NODE  NAME");
 }
 
 void OpenFilesScreen_delete(Object* this) {
@@ -115,13 +120,16 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
       close(fdnull);
       char buffer[32] = {0};
       xSnprintf(buffer, sizeof(buffer), "%d", pid);
-      execlp("lsof", "lsof", "-P", "-p", buffer, "-F", NULL);
+      // Use of NULL in variadic functions must have a pointer cast.
+      // The NULL constant is not required by standard to have a pointer type.
+      execlp("lsof", "lsof", "-P", "-o", "-p", buffer, "-F", (char *)NULL);
       exit(127);
    }
    close(fdpair[1]);
 
    OpenFiles_Data* item = &(pdata->data);
    OpenFiles_FileData* fdata = NULL;
+   bool lsofIncludesFileSize = false;
 
    FILE* fd = fdopen(fdpair[0], "r");
    if (!fd) {
@@ -155,8 +163,17 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
       case 't':  /* file's type */
       {
          size_t index = getIndexForType(cmd);
-         free(item->data[index]);
-         item->data[index] = xStrdup(line + 1);
+         free_and_xStrdup(&item->data[index], line + 1);
+         break;
+      }
+      case 'o':  /* file's offset */
+      {
+         size_t index = getIndexForType(cmd);
+         if (String_startsWith(line + 1, "0t")) {
+            free_and_xStrdup(&item->data[index], line + 3);
+         } else {
+            free_and_xStrdup(&item->data[index], line + 1);
+         }
          break;
       }
       case 'c':  /* process command name  */
@@ -166,7 +183,6 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
       case 'k':  /* link count */
       case 'l':  /* file's lock status */
       case 'L':  /* process login name */
-      case 'o':  /* file's offset */
       case 'p':  /* process ID */
       case 'P':  /* protocol name */
       case 'R':  /* parent process ID */
@@ -175,12 +191,17 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
          /* ignore */
          break;
       }
+
+      if (cmd == 's')
+         lsofIncludesFileSize = true;
+
       free(line);
    }
    fclose(fd);
 
    int wstatus;
-   if (waitpid(child, &wstatus, 0) == -1) {
+   while (waitpid(child, &wstatus, 0) == -1)
+      if (errno != EINTR) {
          pdata->error = 1;
          return pdata;
       }
@@ -191,6 +212,25 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
       pdata->error = WEXITSTATUS(wstatus);
    }
 
+   /* We got all information we need; no post-processing needed */
+   if (lsofIncludesFileSize)
+      return pdata;
+
+   /* On linux, `lsof -o -F` omits SIZE, so add it back. */
+   /* On macOS, `lsof -o -F` includes SIZE, so this block isn't needed.  If no open files have a filesize, this will still run, unfortunately. */
+   size_t fileSizeIndex = getIndexForType('s');
+   for (fdata = pdata->files; fdata != NULL; fdata = fdata->next) {
+      item = &fdata->data;
+      const char* filename = getDataForType(item, 'n');
+
+      struct stat st;
+      if (stat(filename, &st) == 0) {
+         char fileSizeBuf[21]; /* 20 (long long) + 1 (NULL) */
+         xSnprintf(fileSizeBuf, sizeof(fileSizeBuf), "%"PRIu64, st.st_size); /* st.st_size is long long on macOS, long on linux */
+         free_and_xStrdup(&item->data[fileSizeIndex], fileSizeBuf);
+      }
+   }
+
    return pdata;
 }
 
@@ -213,14 +253,15 @@ static void OpenFilesScreen_scan(InfoScreen* this) {
       while (fdata) {
          OpenFiles_Data* data = &fdata->data;
          size_t lenN = strlen(getDataForType(data, 'n'));
-         size_t sizeEntry = 5 + 7 + 4 + 10 + 10 + 10 + lenN + 7 /*spaces*/ + 1 /*null*/;
+         size_t sizeEntry = 5 + 7 + 4 + 10 + 10 + 10 + 10 + lenN + 8 /*spaces*/ + 1 /*null*/;
          char entry[sizeEntry];
-         xSnprintf(entry, sizeof(entry), "%5.5s %-7.7s %-4.4s %-10.10s %10.10s %10.10s  %s",
+         xSnprintf(entry, sizeof(entry), "%5.5s %-7.7s %-4.4s %-10.10s %10.10s %10.10s %10.10s  %s",
                    getDataForType(data, 'f'),
                    getDataForType(data, 't'),
                    getDataForType(data, 'a'),
                    getDataForType(data, 'D'),
                    getDataForType(data, 's'),
+                   getDataForType(data, 'o'),
                    getDataForType(data, 'i'),
                    getDataForType(data, 'n'));
          InfoScreen_addLine(this, entry);

OpenFilesScreen.h

@@ -3,7 +3,7 @@
 /*
 htop - OpenFilesScreen.h
 (C) 2005-2006 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -13,6 +13,7 @@ in the source distribution for its full text.
 #include "Object.h"
 #include "Process.h"
 
+
 typedef struct OpenFilesScreen_ {
    InfoScreen super;
    pid_t pid;

OptionItem.c

@@ -1,7 +1,7 @@
 /*
 htop - OptionItem.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -25,6 +25,13 @@ static void OptionItem_delete(Object* cast) {
    free(this);
 }
 
+static void TextItem_display(const Object* cast, RichString* out) {
+   const TextItem* this = (const TextItem*)cast;
+   assert (this != NULL);
+
+   RichString_appendWide(out, CRT_colors[HELP_BOLD], this->super.text);
+}
+
 static void CheckItem_display(const Object* cast, RichString* out) {
    const CheckItem* this = (const CheckItem*)cast;
    assert (this != NULL);
@@ -53,7 +60,7 @@ static void NumberItem_display(const Object* cast, RichString* out) {
    } else {
       written = xSnprintf(buffer, sizeof(buffer), "%d", NumberItem_get(this));
    }
-   RichString_appendAscii(out, CRT_colors[CHECK_MARK], buffer);
+   RichString_appendnAscii(out, CRT_colors[CHECK_MARK], buffer, written);
    RichString_appendAscii(out, CRT_colors[CHECK_BOX], "]");
    for (int i = written; i < 5; i++) {
       RichString_appendAscii(out, CRT_colors[CHECK_BOX], " ");
@@ -68,6 +75,16 @@ const OptionItemClass OptionItem_class = {
    }
 };
 
+const OptionItemClass TextItem_class = {
+   .super = {
+      .extends = Class(OptionItem),
+      .delete = OptionItem_delete,
+      .display = TextItem_display
+   },
+   .kind = OPTION_ITEM_TEXT
+};
+
+
 const OptionItemClass CheckItem_class = {
    .super = {
       .extends = Class(OptionItem),
@@ -77,6 +94,7 @@ const OptionItemClass CheckItem_class = {
    .kind = OPTION_ITEM_CHECK
 };
 
+
 const OptionItemClass NumberItem_class = {
    .super = {
       .extends = Class(OptionItem),
@@ -86,6 +104,12 @@ const OptionItemClass NumberItem_class = {
    .kind = OPTION_ITEM_NUMBER
 };
 
+TextItem* TextItem_new(const char* text) {
+   TextItem* this = AllocThis(TextItem);
+   this->super.text = xStrdup(text);
+   return this;
+}
+
 CheckItem* CheckItem_newByRef(const char* text, bool* ref) {
    CheckItem* this = AllocThis(CheckItem);
    this->super.text = xStrdup(text);

OptionItem.h

@@ -3,7 +3,7 @@
 /*
 htop - OptionItem.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -13,6 +13,7 @@ in the source distribution for its full text.
 
 
 enum OptionItemType {
+   OPTION_ITEM_TEXT,
    OPTION_ITEM_CHECK,
    OPTION_ITEM_NUMBER,
 };
@@ -32,6 +33,12 @@ typedef struct OptionItem_ {
    char* text;
 } OptionItem;
 
+typedef struct TextItem_ {
+   OptionItem super;
+
+   char* text;
+} TextItem;
+
 typedef struct CheckItem_ {
    OptionItem super;
 
@@ -51,9 +58,12 @@ typedef struct NumberItem_ {
 } NumberItem;
 
 extern const OptionItemClass OptionItem_class;
+extern const OptionItemClass TextItem_class;
 extern const OptionItemClass CheckItem_class;
 extern const OptionItemClass NumberItem_class;
 
+TextItem* TextItem_new(const char* text);
+
 CheckItem* CheckItem_newByRef(const char* text, bool* ref);
 CheckItem* CheckItem_newByVal(const char* text, bool value);
 bool CheckItem_get(const CheckItem* this);

Panel.c

@@ -1,7 +1,7 @@
 /*
 htop - Panel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -30,7 +30,7 @@ const PanelClass Panel_class = {
    .eventHandler = Panel_selectByTyping,
 };
 
-Panel* Panel_new(int x, int y, int w, int h, bool owner, const ObjectClass* type, FunctionBar* fuBar) {
+Panel* Panel_new(int x, int y, int w, int h, const ObjectClass* type, bool owner, FunctionBar* fuBar) {
    Panel* this;
    this = xMalloc(sizeof(Panel));
    Object_setClass(this, Class(Panel));
@@ -49,6 +49,8 @@ void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type
    this->y = y;
    this->w = w;
    this->h = h;
+   this->cursorX = 0;
+   this->cursorY = 0;
    this->eventHandlerState = NULL;
    this->items = Vector_new(type, owner, DEFAULT_SIZE);
    this->scrollV = 0;
@@ -57,6 +59,7 @@ void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type
    this->oldSelected = 0;
    this->selectedLen = 0;
    this->needsRedraw = true;
+   this->cursorOn = false;
    this->wasFocus = false;
    RichString_beginAllocated(this->header);
    this->defaultBar = fuBar;
@@ -69,20 +72,18 @@ void Panel_done(Panel* this) {
    free(this->eventHandlerState);
    Vector_delete(this->items);
    FunctionBar_delete(this->defaultBar);
-   RichString_end(this->header);
+   RichString_delete(&this->header);
+}
+
+void Panel_setCursorToSelection(Panel* this) {
+   this->cursorY = this->y + this->selected - this->scrollV + 1;
+   this->cursorX = this->x + this->selectedLen - this->scrollH;
 }
 
 void Panel_setSelectionColor(Panel* this, ColorElements colorId) {
    this->selectionColorId = colorId;
 }
 
-RichString* Panel_getHeader(Panel* this) {
-   assert (this != NULL);
-
-   this->needsRedraw = true;
-   return &(this->header);
-}
-
 inline void Panel_setHeader(Panel* this, const char* header) {
    RichString_writeWide(&(this->header), CRT_colors[PANEL_HEADER_FOCUS], header);
    this->needsRedraw = true;
@@ -99,10 +100,6 @@ void Panel_move(Panel* this, int x, int y) {
 void Panel_resize(Panel* this, int w, int h) {
    assert (this != NULL);
 
-   if (RichString_sizeVal(this->header) > 0) {
-      h--;
-   }
-
    this->w = w;
    this->h = h;
    this->needsRedraw = true;
@@ -183,13 +180,13 @@ void Panel_moveSelectedDown(Panel* this) {
    }
 }
 
-int Panel_getSelectedIndex(Panel* this) {
+int Panel_getSelectedIndex(const Panel* this) {
    assert (this != NULL);
 
    return this->selected;
 }
 
-int Panel_size(Panel* this) {
+int Panel_size(const Panel* this) {
    assert (this != NULL);
 
    return Vector_size(this->items);
@@ -219,7 +216,7 @@ void Panel_splice(Panel* this, Vector* from) {
    this->needsRedraw = true;
 }
 
-void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelected) {
+void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelected, bool hideFunctionBar) {
    assert (this != NULL);
 
    int size = Vector_size(this->items);
@@ -228,28 +225,37 @@ void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelect
    int x = this->x;
    int h = this->h;
 
-   int headerLen = RichString_sizeVal(this->header);
-   if (headerLen > 0) {
-      int attr = focus
+   if (hideFunctionBar)
+      h++;
+
+   const int header_attr = focus
                          ? CRT_colors[PANEL_HEADER_FOCUS]
                          : CRT_colors[PANEL_HEADER_UNFOCUS];
-      attrset(attr);
+   if (force_redraw) {
+      if (Panel_printHeaderFn(this))
+         Panel_printHeader(this);
+      else
+         RichString_setAttr(&this->header, header_attr);
+   }
+   int headerLen = RichString_sizeVal(this->header);
+   if (headerLen > 0) {
+      attrset(header_attr);
       mvhline(y, x, ' ', this->w);
       if (scrollH < headerLen) {
-         RichString_setAttr(&this->header, attr);
          RichString_printoffnVal(this->header, y, x, scrollH,
             MINIMUM(headerLen - scrollH, this->w));
       }
       attrset(CRT_colors[RESET_COLOR]);
       y++;
+      h--;
    }
 
    // ensure scroll area is on screen
    if (this->scrollV < 0) {
       this->scrollV = 0;
       this->needsRedraw = true;
-   } else if (this->scrollV >= size) {
-      this->scrollV = MAXIMUM(size - 1, 0);
+   } else if (this->scrollV > size - h) {
+      this->scrollV = MAXIMUM(size - h, 0);
       this->needsRedraw = true;
    }
    // ensure selection is on screen
@@ -271,7 +277,7 @@ void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelect
    if (this->needsRedraw || force_redraw) {
       int line = 0;
       for (int i = first; line < h && i < upTo; i++) {
-         Object* itemObj = Vector_get(this->items, i);
+         const Object* itemObj = Vector_get(this->items, i);
          RichString_begin(item);
          Object_display(itemObj, &item);
          int itemLen = RichString_sizeVal(item);
@@ -289,7 +295,7 @@ void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelect
             RichString_printoffnVal(item, y + line, x, scrollH, amt);
          if (item.highlightAttr)
             attrset(CRT_colors[RESET_COLOR]);
-         RichString_end(item);
+         RichString_delete(&item);
          line++;
       }
       while (line < h) {
@@ -298,11 +304,11 @@ void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelect
       }
 
    } else {
-      Object* oldObj = Vector_get(this->items, this->oldSelected);
+      const Object* oldObj = Vector_get(this->items, this->oldSelected);
       RichString_begin(old);
       Object_display(oldObj, &old);
       int oldLen = RichString_sizeVal(old);
-      Object* newObj = Vector_get(this->items, this->selected);
+      const Object* newObj = Vector_get(this->items, this->selected);
       RichString_begin(new);
       Object_display(newObj, &new);
       int newLen = RichString_sizeVal(new);
@@ -318,30 +324,37 @@ void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelect
          RichString_printoffnVal(new, y + this->selected - first, x,
             scrollH, MINIMUM(newLen - scrollH, this->w));
       attrset(CRT_colors[RESET_COLOR]);
-      RichString_end(new);
-      RichString_end(old);
+      RichString_delete(&new);
+      RichString_delete(&old);
    }
 
    if (focus && (this->needsRedraw || force_redraw || !this->wasFocus)) {
       if (Panel_drawFunctionBarFn(this))
-         Panel_drawFunctionBar(this);
-      else
+         Panel_drawFunctionBar(this, hideFunctionBar);
+      else if (!hideFunctionBar)
          FunctionBar_draw(this->currentBar);
    }
 
    this->oldSelected = this->selected;
    this->wasFocus = focus;
    this->needsRedraw = false;
-   move(0, 0);
+}
+
+static int Panel_headerHeight(const Panel* this) {
+   return RichString_sizeVal(this->header) > 0 ? 1 : 0;
 }
 
 bool Panel_onKey(Panel* this, int key) {
    assert (this != NULL);
 
-   int size = Vector_size(this->items);
+   const int size = Vector_size(this->items);
 
-   #define CLAMP_INDEX(var, delta, min, max) \
-      CLAMP((var) + (delta), (min), MAXIMUM(0, (max)))
+   #define PANEL_SCROLL(amount)                                                                                     \
+   do {                                                                                                             \
+      this->selected += (amount);                                                                                   \
+      this->scrollV = CLAMP(this->scrollV + (amount), 0, MAXIMUM(0, (size - this->h - Panel_headerHeight(this))));  \
+      this->needsRedraw = true;                                                                                     \
+   } while (0)
 
    switch (key) {
    case KEY_DOWN:
@@ -375,27 +388,19 @@ bool Panel_onKey(Panel* this, int key) {
       break;
 
    case KEY_PPAGE:
-      this->selected -= (this->h - 1);
-      this->scrollV = CLAMP_INDEX(this->scrollV, -(this->h - 1), 0, size - this->h);
-      this->needsRedraw = true;
+      PANEL_SCROLL(-(this->h - Panel_headerHeight(this)));
       break;
 
    case KEY_NPAGE:
-      this->selected += (this->h - 1);
-      this->scrollV = CLAMP_INDEX(this->scrollV, +(this->h - 1), 0, size - this->h);
-      this->needsRedraw = true;
+      PANEL_SCROLL(+(this->h - Panel_headerHeight(this)));
       break;
 
    case KEY_WHEELUP:
-      this->selected -= CRT_scrollWheelVAmount;
-      this->scrollV = CLAMP_INDEX(this->scrollV, -CRT_scrollWheelVAmount, 0, size - this->h);
-      this->needsRedraw = true;
+      PANEL_SCROLL(-CRT_scrollWheelVAmount);
       break;
 
    case KEY_WHEELDOWN:
-      this->selected += CRT_scrollWheelVAmount;
-      this->scrollV = CLAMP_INDEX(this->scrollV, +CRT_scrollWheelVAmount, 0, size - this->h);
-      this->needsRedraw = true;
+      PANEL_SCROLL(+CRT_scrollWheelVAmount);
       break;
 
    case KEY_HOME:
@@ -420,7 +425,7 @@ bool Panel_onKey(Panel* this, int key) {
       return false;
    }
 
-   #undef CLAMP_INDEX
+   #undef PANEL_SCROLL
 
    // ensure selection within bounds
    if (this->selected < 0 || size == 0) {
@@ -455,7 +460,7 @@ HandlerResult Panel_selectByTyping(Panel* this, int ch) {
       }
 
       if (len < 99) {
-         buffer[len] = ch;
+         buffer[len] = (char) ch;
          buffer[len + 1] = '\0';
       }
 
@@ -472,7 +477,7 @@ HandlerResult Panel_selectByTyping(Panel* this, int ch) {
 
          // if current word did not match,
          // retry considering the character the start of a new word.
-         buffer[0] = ch;
+         buffer[0] = (char) ch;
          buffer[1] = '\0';
       }
 
@@ -487,3 +492,16 @@ HandlerResult Panel_selectByTyping(Panel* this, int ch) {
 
    return IGNORED;
 }
+
+int Panel_getCh(Panel* this) {
+   if (this->cursorOn) {
+      move(this->cursorY, this->cursorX);
+      curs_set(1);
+   } else {
+      curs_set(0);
+   }
+#ifdef HAVE_SET_ESCDELAY
+   set_escdelay(25);
+#endif
+   return getch();
+}

Panel.h

@@ -3,10 +3,13 @@
 /*
 htop - Panel.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "config.h" // IWYU pragma: keep
+
+#include <assert.h>
 #include <stdbool.h>
 
 #include "CRT.h"
@@ -26,7 +29,8 @@ typedef enum HandlerResult_ {
    REFRESH     = 0x08,
    REDRAW      = 0x10,
    RESCAN      = 0x20,
-   SYNTH_KEY   = 0x40,
+   RESIZE      = 0x40,
+   SYNTH_KEY   = 0x80,
 } HandlerResult;
 
 #define EVENT_SET_SELECTED (-1)
@@ -35,32 +39,42 @@ typedef enum HandlerResult_ {
 #define EVENT_IS_HEADER_CLICK(ev_) ((ev_) >= -10000 && (ev_) <= -9000)
 #define EVENT_HEADER_CLICK_GET_X(ev_) ((ev_) + 10000)
 
+#define EVENT_SCREEN_TAB_CLICK(x_) (-20000 + (x_))
+#define EVENT_IS_SCREEN_TAB_CLICK(ev_) ((ev_) >= -20000 && (ev_) < -10000)
+#define EVENT_SCREEN_TAB_GET_X(ev_) ((ev_) + 20000)
+
 typedef HandlerResult (*Panel_EventHandler)(Panel*, int);
-typedef void (*Panel_DrawFunctionBar)(Panel*);
+typedef void (*Panel_DrawFunctionBar)(Panel*, bool);
+typedef void (*Panel_PrintHeader)(Panel*);
 
 typedef struct PanelClass_ {
    const ObjectClass super;
    const Panel_EventHandler eventHandler;
    const Panel_DrawFunctionBar drawFunctionBar;
+   const Panel_PrintHeader printHeader;
 } PanelClass;
 
 #define As_Panel(this_)                        ((const PanelClass*)((this_)->super.klass))
 #define Panel_eventHandlerFn(this_)            As_Panel(this_)->eventHandler
 #define Panel_eventHandler(this_, ev_)         (assert(As_Panel(this_)->eventHandler), As_Panel(this_)->eventHandler((Panel*)(this_), ev_))
 #define Panel_drawFunctionBarFn(this_)         As_Panel(this_)->drawFunctionBar
-#define Panel_drawFunctionBar(this_)    (assert(As_Panel(this_)->drawFunctionBar), As_Panel(this_)->drawFunctionBar((Panel*)(this_)))
+#define Panel_drawFunctionBar(this_, hideFB_)  (assert(As_Panel(this_)->drawFunctionBar), As_Panel(this_)->drawFunctionBar((Panel*)(this_), hideFB_))
+#define Panel_printHeaderFn(this_)             As_Panel(this_)->printHeader
+#define Panel_printHeader(this_)               (assert(As_Panel(this_)->printHeader), As_Panel(this_)->printHeader((Panel*)(this_)))
 
 struct Panel_ {
    Object super;
    int x, y, w, h;
+   int cursorX, cursorY;
    Vector* items;
    int selected;
    int oldSelected;
    int selectedLen;
    void* eventHandlerState;
    int scrollV;
-   short scrollH;
+   int scrollH;
    bool needsRedraw;
+   bool cursorOn;
    bool wasFocus;
    FunctionBar* currentBar;
    FunctionBar* defaultBar;
@@ -74,7 +88,7 @@ struct Panel_ {
 
 extern const PanelClass Panel_class;
 
-Panel* Panel_new(int x, int y, int w, int h, bool owner, const ObjectClass* type, FunctionBar* fuBar);
+Panel* Panel_new(int x, int y, int w, int h, const ObjectClass* type, bool owner, FunctionBar* fuBar);
 
 void Panel_delete(Object* cast);
 
@@ -82,9 +96,9 @@ void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type
 
 void Panel_done(Panel* this);
 
-void Panel_setSelectionColor(Panel* this, ColorElements colorId);
+void Panel_setCursorToSelection(Panel* this);
 
-RichString* Panel_getHeader(Panel* this);
+void Panel_setSelectionColor(Panel* this, ColorElements colorId);
 
 void Panel_setHeader(Panel* this, const char* header);
 
@@ -110,13 +124,13 @@ void Panel_moveSelectedUp(Panel* this);
 
 void Panel_moveSelectedDown(Panel* this);
 
-int Panel_getSelectedIndex(Panel* this);
+int Panel_getSelectedIndex(const Panel* this);
 
-int Panel_size(Panel* this);
+int Panel_size(const Panel* this);
 
 void Panel_setSelected(Panel* this, int selected);
 
-void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelected);
+void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelected, bool hideFunctionBar);
 
 void Panel_splice(Panel* this, Vector* from);
 
@@ -124,4 +138,6 @@ bool Panel_onKey(Panel* this, int key);
 
 HandlerResult Panel_selectByTyping(Panel* this, int ch);
 
+int Panel_getCh(Panel* this);
+
 #endif

Process.h

@@ -4,7 +4,7 @@
 htop - Process.h
 (C) 2004-2015 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -17,7 +17,9 @@ in the source distribution for its full text.
 #include "RichString.h"
 
 
-#define PROCESS_FLAG_IO 0x0001
+#define PROCESS_FLAG_IO              0x00000001
+#define PROCESS_FLAG_CWD             0x00000002
+
 #define DEFAULT_HIGHLIGHT_SECS 5
 
 typedef enum ProcessField_ {
@@ -28,7 +30,7 @@ typedef enum ProcessField_ {
    PPID = 4,
    PGRP = 5,
    SESSION = 6,
-   TTY_NR = 7,
+   TTY = 7,
    TPGID = 8,
    MINFLT = 10,
    MAJFLT = 12,
@@ -46,104 +48,260 @@ typedef enum ProcessField_ {
    NLWP = 51,
    TGID = 52,
    PERCENT_NORM_CPU = 53,
+   ELAPSED = 54,
+   PROC_COMM = 124,
+   PROC_EXE = 125,
+   CWD = 126,
 
    /* Platform specific fields, defined in ${platform}/ProcessField.h */
    PLATFORM_PROCESS_FIELDS
 
+   /* Do not add new fields after this entry (dynamic entries follow) */
    LAST_PROCESSFIELD
 } ProcessField;
 
+/* Core process states (shared by platforms)
+ * NOTE: The enum has an ordering that is important!
+ * See processStateChar in process.c for ProcessSate -> letter mapping */
+typedef enum ProcessState_ {
+   UNKNOWN = 1,
+   RUNNABLE,
+   RUNNING,
+   QUEUED,
+   WAITING,
+   UNINTERRUPTIBLE_WAIT,
+   BLOCKED,
+   PAGING,
+   STOPPED,
+   TRACED,
+   ZOMBIE,
+   DEFUNCT,
+   IDLE,
+   SLEEPING
+} ProcessState;
+
 struct Settings_;
 
+/* Holds information about regions of the cmdline that should be
+ * highlighted (e.g. program basename, delimiter, comm). */
+typedef struct ProcessCmdlineHighlight_ {
+   size_t offset; /* first character to highlight */
+   size_t length; /* How many characters to highlight, zero if unused */
+   int attr;      /* The attributes used to highlight */
+   int flags;     /* Special flags used for selective highlighting, zero for always */
+} ProcessCmdlineHighlight;
+
+/* ProcessMergedCommand is populated by Process_makeCommandStr: It
+ * contains the merged Command string, and the information needed by
+ * Process_writeCommand to color the string. str will be NULL for kernel
+ * threads and zombies */
+typedef struct ProcessMergedCommand_ {
+   uint64_t lastUpdate;                        /* Marker based on settings->lastUpdate to track when the rendering needs refreshing */
+   char* str;                                  /* merged Command string */
+   size_t highlightCount;                      /* how many portions of cmdline to highlight */
+   ProcessCmdlineHighlight highlights[8];      /* which portions of cmdline to highlight */
+} ProcessMergedCommand;
+
 typedef struct Process_ {
+   /* Super object for emulated OOP */
    Object super;
 
+   /* Pointer to quasi-global data structures */
    const struct ProcessList_* processList;
    const struct Settings_* settings;
 
-   unsigned long long int time;
+   /* Process identifier */
    pid_t pid;
+
+   /* Parent process identifier */
    pid_t ppid;
+
+   /* Thread group identifier */
    pid_t tgid;
-   char* comm;  /* use Process_getCommand() for Command actually displayed */
-   int commLen;
-   int indent;
 
-   int basenameOffset;
-   bool updated;
+   /* Process group identifier */
+   int pgrp;
 
-   char state;
-   bool tag;
-   bool showChildren;
-   bool show;
-   bool wasShown;
-   unsigned int pgrp;
-   unsigned int session;
-   unsigned int tty_nr;
+   /* Session identifier */
+   int session;
+
+   /* Foreground group identifier of the controlling terminal */
    int tpgid;
-   uid_t st_uid;
-   unsigned long int flags;
-   int processor;
 
-   float percent_cpu;
-   float percent_mem;
+   /* This is a kernel (helper) task */
+   bool isKernelThread;
+
+   /* This is a userland thread / LWP */
+   bool isUserlandThread;
+
+   /* Controlling terminal identifier of the process */
+   unsigned long int tty_nr;
+
+   /* Controlling terminal name of the process */
+   char* tty_name;
+
+   /* User identifier */
+   uid_t st_uid;
+
+   /* User name */
    const char* user;
 
+   /* Process runtime (in hundredth of a second) */
+   unsigned long long int time;
+
+   /*
+    * Process name including arguments.
+    * Use Process_getCommand() for Command actually displayed.
+    */
+   char* cmdline;
+
+   /* End Offset in cmdline of the process basename */
+   int cmdlineBasenameEnd;
+
+   /* Start Offset in cmdline of the process basename */
+   int cmdlineBasenameStart;
+
+   /* The process' "command" name */
+   char* procComm;
+
+   /* The main process executable */
+   char* procExe;
+
+   /* The process/thread working directory */
+   char* procCwd;
+
+   /* Offset in procExe of the process basename */
+   int procExeBasenameOffset;
+
+   /* Tells if the executable has been replaced in the filesystem since start */
+   bool procExeDeleted;
+
+   /* Tells if the process uses replaced shared libraries since start */
+   bool usesDeletedLib;
+
+   /* CPU number last executed on */
+   int processor;
+
+   /* CPU usage during last cycle (in percent) */
+   float percent_cpu;
+
+   /* Memory usage during last cycle (in percent) */
+   float percent_mem;
+
+   /* Scheduling priority */
    long int priority;
+
+   /* Nice value */
    long int nice;
+
+   /* Number of threads in this process */
    long int nlwp;
-   char starttime_show[8];
+
+   /* Process start time (in seconds elapsed since the Epoch) */
    time_t starttime_ctime;
 
+   /* Process start time (cached formatted string) */
+   char starttime_show[8];
+
+   /* Total program size (in kilobytes) */
    long m_virt;
+
+   /* Resident set size (in kilobytes) */
    long m_resident;
 
-   int exit_signal;
-
-   time_t seenTs;
-   time_t tombTs;
-
+   /* Number of minor faults the process has made which have not required loading a memory page from disk */
    unsigned long int minflt;
+
+   /* Number of major faults the process has made which have required loading a memory page from disk */
    unsigned long int majflt;
 
-   unsigned int tree_left;
-   unsigned int tree_right;
+   /* Process state enum field (platform dependent) */
+   ProcessState state;
+
+   /* Whether the process was updated during the current scan */
+   bool updated;
+
+   /* Whether the process was tagged by the user */
+   bool tag;
+
+   /* Whether to display this process */
+   bool show;
+
+   /* Whether this process was shown last cycle */
+   bool wasShown;
+
+   /* Whether to show children of this process in tree-mode */
+   bool showChildren;
+
+   /*
+    * Internal time counts for showing new and exited processes.
+    */
+   uint64_t seenStampMs;
+   uint64_t tombStampMs;
+
+   /*
+    * Internal state for tree-mode.
+    */
+   int indent;
    unsigned int tree_depth;
-   unsigned int tree_index;
+
+   /* Has no known parent process */
+   bool isRoot;
+
+   /*
+    * Internal state for merged Command display
+    */
+   ProcessMergedCommand mergedCommand;
 } Process;
 
 typedef struct ProcessFieldData_ {
+   /* Name (displayed in setup menu) */
    const char* name;
+
+   /* Title (display in main screen); must have same width as the printed values */
    const char* title;
+
+   /* Description (displayed in setup menu) */
    const char* description;
+
+   /* Scan flag to enable scan-method otherwise not run */
    uint32_t flags;
+
+   /* Whether the values are process identifiers; adjusts the width of title and values if true */
    bool pidColumn;
+
+   /* Whether the column should be sorted in descending order by default */
+   bool defaultSortDesc;
+
+   /* Whether the column width is dynamically adjusted (the minimum width is determined by the title length) */
+   bool autoWidth;
 } ProcessFieldData;
 
 // Implemented in platform-specific code:
 void Process_writeField(const Process* this, RichString* str, ProcessField field);
-long Process_compare(const void* v1, const void* v2);
+int Process_compare(const void* v1, const void* v2);
 void Process_delete(Object* cast);
-bool Process_isThread(const Process* this);
 extern const ProcessFieldData Process_fields[LAST_PROCESSFIELD];
+extern uint8_t Process_fieldWidths[LAST_PROCESSFIELD];
+#define PROCESS_MIN_PID_DIGITS 5
 #define PROCESS_MAX_PID_DIGITS 19
+#define PROCESS_MIN_UID_DIGITS 5
+#define PROCESS_MAX_UID_DIGITS 20
 extern int Process_pidDigits;
+extern int Process_uidDigits;
 
 typedef Process* (*Process_New)(const struct Settings_*);
 typedef void (*Process_WriteField)(const Process*, RichString*, ProcessField);
-typedef long (*Process_CompareByKey)(const Process*, const Process*, ProcessField);
-typedef const char* (*Process_GetCommandStr)(const Process*);
+typedef int (*Process_CompareByKey)(const Process*, const Process*, ProcessField);
 
 typedef struct ProcessClass_ {
    const ObjectClass super;
    const Process_WriteField writeField;
    const Process_CompareByKey compareByKey;
-   const Process_GetCommandStr getCommandStr;
 } ProcessClass;
 
 #define As_Process(this_)                              ((const ProcessClass*)((this_)->super.klass))
 
-#define Process_getCommand(this_)                      (As_Process(this_)->getCommandStr ? As_Process(this_)->getCommandStr((const Process*)(this_)) : ((const Process*)(this_))->comm)
 #define Process_compareByKey(p1_, p2_, key_)           (As_Process(p1_)->compareByKey ? (As_Process(p1_)->compareByKey(p1_, p2_, key_)) : Process_compareByKey_Base(p1_, p2_, key_))
 
 static inline pid_t Process_getParentPid(const Process* this) {
@@ -154,30 +312,60 @@ static inline bool Process_isChildOf(const Process* this, pid_t pid) {
    return pid == Process_getParentPid(this);
 }
 
-#define Process_sortState(state) ((state) == 'I' ? 0x100 : (state))
+static inline bool Process_isKernelThread(const Process* this) {
+   return this->isKernelThread;
+}
 
+static inline bool Process_isUserlandThread(const Process* this) {
+   return this->isUserlandThread;
+}
+
+static inline bool Process_isThread(const Process* this) {
+   return Process_isUserlandThread(this) || Process_isKernelThread(this);
+}
+
+#define CMDLINE_HIGHLIGHT_FLAG_SEPARATOR  0x00000001
+#define CMDLINE_HIGHLIGHT_FLAG_BASENAME   0x00000002
+#define CMDLINE_HIGHLIGHT_FLAG_COMM       0x00000004
+#define CMDLINE_HIGHLIGHT_FLAG_DELETED    0x00000008
 
 #define ONE_K 1024UL
 #define ONE_M (ONE_K * ONE_K)
 #define ONE_G (ONE_M * ONE_K)
 #define ONE_T (1ULL * ONE_G * ONE_K)
+#define ONE_P (1ULL * ONE_T * ONE_K)
 
 #define ONE_DECIMAL_K 1000UL
 #define ONE_DECIMAL_M (ONE_DECIMAL_K * ONE_DECIMAL_K)
 #define ONE_DECIMAL_G (ONE_DECIMAL_M * ONE_DECIMAL_K)
 #define ONE_DECIMAL_T (1ULL * ONE_DECIMAL_G * ONE_DECIMAL_K)
+#define ONE_DECIMAL_P (1ULL * ONE_DECIMAL_T * ONE_DECIMAL_K)
 
 void Process_setupColumnWidths(void);
 
-void Process_humanNumber(RichString* str, unsigned long long number, bool coloring);
+/* Sets the size of the UID column based on the passed UID */
+void Process_setUidColumnWidth(uid_t maxUid);
 
-void Process_colorNumber(RichString* str, unsigned long long number, bool coloring);
+/* Takes number in bytes (base 1024). Prints 6 columns. */
+void Process_printBytes(RichString* str, unsigned long long number, bool coloring);
 
-void Process_printTime(RichString* str, unsigned long long totalHundredths);
+/* Takes number in kilo bytes (base 1024). Prints 6 columns. */
+void Process_printKBytes(RichString* str, unsigned long long number, bool coloring);
+
+/* Takes number as count (base 1000). Prints 12 columns. */
+void Process_printCount(RichString* str, unsigned long long number, bool coloring);
+
+/* Takes time in hundredths of a seconds. Prints 9 columns. */
+void Process_printTime(RichString* str, unsigned long long totalHundredths, bool coloring);
+
+/* Takes rate in bare unit (base 1024) per second. Prints 12 columns. */
+void Process_printRate(RichString* str, double rate, bool coloring);
 
 void Process_fillStarttimeBuffer(Process* this);
 
-void Process_outputRate(RichString* str, char* buffer, size_t n, double rate, int coloring);
+void Process_printLeftAlignedField(RichString* str, int attr, const char* content, unsigned int width);
+
+void Process_printPercentage(float val, char* buffer, int n, uint8_t width, int* attr);
 
 void Process_display(const Object* cast, RichString* out);
 
@@ -199,8 +387,28 @@ bool Process_changePriorityBy(Process* this, Arg delta);
 
 bool Process_sendSignal(Process* this, Arg sgn);
 
-long Process_pidCompare(const void* v1, const void* v2);
+static inline int Process_pidEqualCompare(const void* v1, const void* v2) {
+   const pid_t p1 = ((const Process*)v1)->pid;
+   const pid_t p2 = ((const Process*)v2)->pid;
+   return p1 != p2; /* return zero when equal */
+}
 
-long Process_compareByKey_Base(const Process* p1, const Process* p2, ProcessField key);
+int Process_compareByKey_Base(const Process* p1, const Process* p2, ProcessField key);
+
+const char* Process_getCommand(const Process* this);
+
+void Process_updateComm(Process* this, const char* comm);
+void Process_updateCmdline(Process* this, const char* cmdline, int basenameStart, int basenameEnd);
+void Process_updateExe(Process* this, const char* exe);
+
+/* This function constructs the string that is displayed by
+ * Process_writeCommand and also returned by Process_getCommand */
+void Process_makeCommandStr(Process* this);
+
+void Process_writeCommand(const Process* this, int attr, int baseAttr, RichString* str);
+
+void Process_resetFieldWidths(void);
+void Process_updateFieldWidth(ProcessField key, size_t width);
+void Process_updateCPUFieldWidths(float percentage);
 
 #endif

ProcessList.c

@@ -1,7 +1,7 @@
 /*
 htop - ProcessList.c
 (C) 2004,2005 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -11,31 +11,36 @@ in the source distribution for its full text.
 #include <stdlib.h>
 #include <string.h>
 
-#include "Compat.h"
 #include "CRT.h"
+#include "DynamicColumn.h"
 #include "Hashtable.h"
 #include "Macros.h"
+#include "Platform.h"
 #include "Vector.h"
 #include "XUtils.h"
 
 
-ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, UsersTable* usersTable, Hashtable* pidMatchList, uid_t userId) {
+ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* dynamicColumns, Hashtable* pidMatchList, uid_t userId) {
    this->processes = Vector_new(klass, true, DEFAULT_SIZE);
-   this->processes2 = Vector_new(klass, true, DEFAULT_SIZE); // tree-view auxiliary buffer
+   this->displayList = Vector_new(klass, false, DEFAULT_SIZE);
 
    this->processTable = Hashtable_new(200, false);
-   this->displayTreeSet = Hashtable_new(200, false);
-   this->draftingTreeSet = Hashtable_new(200, false);
+   this->needsSort = true;
 
    this->usersTable = usersTable;
    this->pidMatchList = pidMatchList;
+   this->dynamicMeters = dynamicMeters;
+   this->dynamicColumns = dynamicColumns;
 
    this->userId = userId;
 
    // set later by platform-specific code
-   this->cpuCount = 0;
+   this->activeCPUs = 0;
+   this->existingCPUs = 0;
+   this->monotonicMs = 0;
 
-   this->scanTs = 0;
+   // always maintain valid realtime timestamps
+   Platform_gettime_realtime(&this->realtime, &this->realtimeMs);
 
 #ifdef HAVE_LIBHWLOC
    this->topologyOk = false;
@@ -67,11 +72,9 @@ void ProcessList_done(ProcessList* this) {
    }
 #endif
 
-   Hashtable_delete(this->draftingTreeSet);
-   Hashtable_delete(this->displayTreeSet);
    Hashtable_delete(this->processTable);
 
-   Vector_delete(this->processes2);
+   Vector_delete(this->displayList);
    Vector_delete(this->processes);
 }
 
@@ -79,31 +82,63 @@ void ProcessList_setPanel(ProcessList* this, Panel* panel) {
    this->panel = panel;
 }
 
-static const char* alignedProcessFieldTitle(ProcessField field) {
+static const char* alignedDynamicColumnTitle(const ProcessList* this, int key, char* titleBuffer, size_t titleBufferSize) {
+   const DynamicColumn* column = Hashtable_get(this->dynamicColumns, key);
+   if (column == NULL)
+      return "- ";
+   int width = column->width;
+   if (!width || abs(width) > DYNAMIC_MAX_COLUMN_WIDTH)
+      width = DYNAMIC_DEFAULT_COLUMN_WIDTH;
+   xSnprintf(titleBuffer, titleBufferSize, "%*s", width, column->heading);
+   return titleBuffer;
+}
+
+static const char* alignedProcessFieldTitle(const ProcessList* this, ProcessField field) {
+   static char titleBuffer[UINT8_MAX + sizeof(" ")];
+   assert(sizeof(titleBuffer) >= DYNAMIC_MAX_COLUMN_WIDTH + sizeof(" "));
+   assert(sizeof(titleBuffer) >= PROCESS_MAX_PID_DIGITS + sizeof(" "));
+   assert(sizeof(titleBuffer) >= PROCESS_MAX_UID_DIGITS + sizeof(" "));
+
+   if (field >= LAST_PROCESSFIELD)
+      return alignedDynamicColumnTitle(this, field, titleBuffer, sizeof(titleBuffer));
+
    const char* title = Process_fields[field].title;
    if (!title)
       return "- ";
 
-   if (!Process_fields[field].pidColumn)
-      return title;
-
-   static char titleBuffer[PROCESS_MAX_PID_DIGITS + /* space */ 1 + /* null-terminator */ + 1];
+   if (Process_fields[field].pidColumn) {
       xSnprintf(titleBuffer, sizeof(titleBuffer), "%*s ", Process_pidDigits, title);
-
       return titleBuffer;
    }
 
-void ProcessList_printHeader(ProcessList* this, RichString* header) {
-   RichString_prune(header);
+   if (field == ST_UID) {
+      xSnprintf(titleBuffer, sizeof(titleBuffer), "%*s ", Process_uidDigits, title);
+      return titleBuffer;
+   }
+
+   if (Process_fields[field].autoWidth) {
+      if (field == PERCENT_CPU)
+         xSnprintf(titleBuffer, sizeof(titleBuffer), "%*s ", Process_fieldWidths[field], title);
+      else
+         xSnprintf(titleBuffer, sizeof(titleBuffer), "%-*.*s ", Process_fieldWidths[field], Process_fieldWidths[field], title);
+      return titleBuffer;
+   }
+
+   return title;
+}
+
+void ProcessList_printHeader(const ProcessList* this, RichString* header) {
+   RichString_rewind(header, RichString_size(header));
 
    const Settings* settings = this->settings;
-   const ProcessField* fields = settings->fields;
+   const ScreenSettings* ss = settings->ss;
+   const ProcessField* fields = ss->fields;
 
-   ProcessField key = Settings_getActiveSortKey(settings);
+   ProcessField key = ScreenSettings_getActiveSortKey(ss);
 
    for (int i = 0; fields[i]; i++) {
       int color;
-      if (settings->treeView && settings->treeViewAlwaysByPID) {
+      if (ss->treeView && ss->treeViewAlwaysByPID) {
          color = CRT_colors[PANEL_HEADER_FOCUS];
       } else if (key == fields[i]) {
          color = CRT_colors[PANEL_SELECTION_FOCUS];
@@ -111,7 +146,15 @@ void ProcessList_printHeader(ProcessList* this, RichString* header) {
          color = CRT_colors[PANEL_HEADER_FOCUS];
       }
 
-      RichString_appendWide(header, color, alignedProcessFieldTitle(fields[i]));
+      RichString_appendWide(header, color, alignedProcessFieldTitle(this, fields[i]));
+      if (key == fields[i] && RichString_getCharVal(*header, RichString_size(header) - 1) == ' ') {
+         bool ascending = ScreenSettings_getActiveDirection(ss) == 1;
+         RichString_rewind(header, 1);  // rewind to override space
+         RichString_appendnWide(header,
+                                CRT_colors[PANEL_SELECTION_FOCUS],
+                                CRT_treeStr[ascending ? TREE_STR_ASC : TREE_STR_DESC],
+                                1);
+      }
       if (COMM == fields[i] && settings->showMergedCommand) {
          RichString_appendAscii(header, color, "(merged)");
       }
@@ -119,353 +162,185 @@ void ProcessList_printHeader(ProcessList* this, RichString* header) {
 }
 
 void ProcessList_add(ProcessList* this, Process* p) {
-   assert(Vector_indexOf(this->processes, p, Process_pidCompare) == -1);
+   assert(Vector_indexOf(this->processes, p, Process_pidEqualCompare) == -1);
    assert(Hashtable_get(this->processTable, p->pid) == NULL);
    p->processList = this;
 
    // highlighting processes found in first scan by first scan marked "far in the past"
-   p->seenTs = this->scanTs;
+   p->seenStampMs = this->monotonicMs;
 
    Vector_add(this->processes, p);
    Hashtable_put(this->processTable, p->pid, p);
 
-   assert(Vector_indexOf(this->processes, p, Process_pidCompare) != -1);
+   assert(Vector_indexOf(this->processes, p, Process_pidEqualCompare) != -1);
    assert(Hashtable_get(this->processTable, p->pid) != NULL);
-   assert(Hashtable_count(this->processTable) == Vector_count(this->processes));
+   assert(Vector_countEquals(this->processes, Hashtable_count(this->processTable)));
 }
 
-void ProcessList_remove(ProcessList* this, Process* p) {
-   assert(Vector_indexOf(this->processes, p, Process_pidCompare) != -1);
-   assert(Hashtable_get(this->processTable, p->pid) != NULL);
+// ProcessList_removeIndex removes Process p from the list's map and soft deletes
+// it from its vector. Vector_compact *must* be called once the caller is done
+// removing items.
+// Should only be called from ProcessList_scan to avoid breaking dying process highlighting.
+static void ProcessList_removeIndex(ProcessList* this, const Process* p, int idx) {
+   pid_t pid = p->pid;
 
-   Process* pp = Hashtable_remove(this->processTable, p->pid);
-   assert(pp == p); (void)pp;
+   assert(p == (Process*)Vector_get(this->processes, idx));
+   assert(Hashtable_get(this->processTable, pid) != NULL);
 
-   unsigned int pid = p->pid;
-   int idx = Vector_indexOf(this->processes, p, Process_pidCompare);
-   assert(idx != -1);
+   Hashtable_remove(this->processTable, pid);
+   Vector_softRemove(this->processes, idx);
 
-   if (idx >= 0) {
-      Vector_remove(this->processes, idx);
+   if (this->following != -1 && this->following == pid) {
+      this->following = -1;
+      Panel_setSelectionColor(this->panel, PANEL_SELECTION_FOCUS);
    }
 
-   assert(Hashtable_get(this->processTable, pid) == NULL); (void)pid;
-   assert(Hashtable_count(this->processTable) == Vector_count(this->processes));
+   assert(Hashtable_get(this->processTable, pid) == NULL);
+   assert(Vector_countEquals(this->processes, Hashtable_count(this->processTable)));
 }
 
-Process* ProcessList_get(ProcessList* this, int idx) {
-   return (Process*)Vector_get(this->processes, idx);
-}
-
-int ProcessList_size(ProcessList* this) {
-   return Vector_size(this->processes);
-}
-
-// ProcessList_updateTreeSetLayer sorts this->displayTreeSet,
-// relying only on itself.
-//
-// Algorithm
-//
-// The algorithm is based on `depth-first search`,
-// even though `breadth-first search` approach may be more efficient on first glance,
-// after comparison it may be not, as it's not safe to go deeper without first updating the tree structure.
-// If it would be safe that approach would likely bring an advantage in performance.
-//
-// Each call of the function looks for a 'layer'. A 'layer' is a list of processes with the same depth.
-// First it sorts a list. Then it runs the function recursively for each element of the sorted list.
-// After that it updates the settings of processes.
-//
-// It relies on `leftBound` and `rightBound` as an optimization to cut the list size at the time it builds a 'layer'.
-//
-// It uses a temporary Hashtable `draftingTreeSet` because it's not safe to traverse a tree
-// and at the same time make changes in it.
-//
-static void ProcessList_updateTreeSetLayer(ProcessList* this, unsigned int leftBound, unsigned int rightBound, unsigned int deep, unsigned int left, unsigned int right, unsigned int* index, unsigned int* treeIndex, int indent) {
-
-   // It's guaranteed that layer_size is enough space
-   // but most likely it needs less. Specifically on first iteration.
-   int layerSize = (right - left) / 2;
-
-   // check if we reach `children` of `leaves`
-   if (layerSize == 0)
+static void ProcessList_buildTreeBranch(ProcessList* this, pid_t pid, int level, int indent, bool show) {
+   // On OpenBSD the kernel thread 'swapper' has pid 0.
+   // Do not treat it as root of any tree.
+   if (pid == 0)
       return;
 
-   Vector* layer = Vector_new(this->processes->type, false, layerSize);
-
-   // Find all processes on the same layer (process with the same `deep` value
-   // and included in a range from `leftBound` to `rightBound`).
-   //
-   // This loop also keeps track of left_bound and right_bound of these processes
-   // in order not to lose this information once the list is sorted.
-   //
-   // The variables left_bound and right_bound are different from what the values lhs and rhs represent.
-   // While left_bound and right_bound define a range of processes to look at, the values given by lhs and rhs are indices into an array
-   //
-   // In the below example note how filtering a range of indices i is different from filtering for processes in the bounds left_bound < x < right_bound …
-   //
-   // The nested tree set is sorted by left value, which is guaranteed upon entry/exit of this function.
-   //
-   // i | l | r
-   // 1 | 1 | 9
-   // 2 | 2 | 8
-   // 3 | 4 | 5
-   // 4 | 6 | 7
-   for (unsigned int i = leftBound; i < rightBound; i++) {
-      Process* proc = (Process*)Hashtable_get(this->displayTreeSet, i);
-      assert(proc);
-      if (proc && proc->tree_depth == deep && proc->tree_left > left && proc->tree_right < right) {
-         if (Vector_size(layer) > 0) {
-            Process* previous_process = (Process*)Vector_get(layer, Vector_size(layer) - 1);
-
-            // Make a 'right_bound' of previous_process in a layer the current process's index.
-            //
-            // Use 'tree_depth' as a temporal variable.
-            // It's safe to do as later 'tree_depth' will be renovated.
-            previous_process->tree_depth = proc->tree_index;
-         }
-
-         Vector_add(layer, proc);
-      }
-   }
-
-   // The loop above changes just up to process-1.
-   // So the last process of the layer isn't updated by the above code.
-   //
-   // Thus, if present, set the `rightBound` to the last process on the layer
-   if (Vector_size(layer) > 0) {
-      Process* previous_process = (Process*)Vector_get(layer, Vector_size(layer) - 1);
-      previous_process->tree_depth = rightBound;
-   }
-
-   Vector_quickSort(layer);
-
-   int size = Vector_size(layer);
-   for (int i = 0; i < size; i++) {
-      Process* proc = (Process*)Vector_get(layer, i);
-
-      unsigned int idx = (*index)++;
-      int newLeft = (*treeIndex)++;
-
-      int level = deep == 0 ? 0 : (int)deep - 1;
-      int currentIndent = indent == -1 ? 0 : indent | (1 << level);
-      int nextIndent = indent == -1 ? 0 : ((i < size - 1) ? currentIndent : indent);
-
-      unsigned int newLeftBound = proc->tree_index;
-      unsigned int newRightBound = proc->tree_depth;
-      ProcessList_updateTreeSetLayer(this, newLeftBound, newRightBound, deep + 1, proc->tree_left, proc->tree_right, index, treeIndex, nextIndent);
-
-      int newRight = (*treeIndex)++;
-
-      proc->tree_left = newLeft;
-      proc->tree_right = newRight;
-      proc->tree_index = idx;
-      proc->tree_depth = deep;
-
-      if (indent == -1) {
-         proc->indent = 0;
-      } else if (i == size - 1) {
-         proc->indent = -currentIndent;
+   // The vector is sorted by parent PID, find the start of the range by bisection
+   int vsize = Vector_size(this->processes);
+   int l = 0;
+   int r = vsize;
+   while (l < r) {
+      int c = (l + r) / 2;
+      Process* process = (Process*)Vector_get(this->processes, c);
+      pid_t ppid = process->isRoot ? 0 : Process_getParentPid(process);
+      if (ppid < pid) {
+         l = c + 1;
       } else {
-         proc->indent = currentIndent;
+         r = c;
+      }
+   }
+   // Find the end to know the last line for indent handling purposes
+   int lastShown = r;
+   while (r < vsize) {
+      Process* process = (Process*)Vector_get(this->processes, r);
+      if (!Process_isChildOf(process, pid))
+         break;
+      if (process->show)
+         lastShown = r;
+      r++;
    }
 
-      Hashtable_put(this->draftingTreeSet, proc->tree_index, proc);
-
-      // It's not strictly necessary to do this, but doing so anyways
-      // allows for checking the correctness of the inner workings.
-      Hashtable_remove(this->displayTreeSet, newLeftBound);
-   }
-
-   Vector_delete(layer);
-}
-
-static void ProcessList_updateTreeSet(ProcessList* this) {
-   unsigned int index = 0;
-   unsigned int tree_index = 1;
-
-   const int vsize = Vector_size(this->processes);
-
-   assert(Hashtable_count(this->draftingTreeSet) == 0);
-   assert((int)Hashtable_count(this->displayTreeSet) == vsize);
-
-   ProcessList_updateTreeSetLayer(this, 0, vsize, 0, 0, vsize * 2 + 1, &index, &tree_index, -1);
-
-   Hashtable* tmp = this->draftingTreeSet;
-   this->draftingTreeSet = this->displayTreeSet;
-   this->displayTreeSet = tmp;
-
-   assert(Hashtable_count(this->draftingTreeSet) == 0);
-   assert((int)Hashtable_count(this->displayTreeSet) == vsize);
-}
-
-static void ProcessList_buildTreeBranch(ProcessList* this, pid_t pid, int level, int indent, int direction, bool show, int* node_counter, int* node_index) {
-   Vector* children = Vector_new(Class(Process), false, DEFAULT_SIZE);
-
-   for (int i = Vector_size(this->processes) - 1; i >= 0; i--) {
+   for (int i = l; i < r; i++) {
       Process* process = (Process*)Vector_get(this->processes, i);
-      if (process->show && Process_isChildOf(process, pid)) {
-         process = (Process*)Vector_take(this->processes, i);
-         Vector_add(children, process);
-      }
-   }
-
-   int size = Vector_size(children);
-   for (int i = 0; i < size; i++) {
-      int index = (*node_index)++;
-      Process* process = (Process*)Vector_get(children, i);
-
-      int lft = (*node_counter)++;
 
       if (!show) {
          process->show = false;
       }
 
-      int s = Vector_size(this->processes2);
-      if (direction == 1) {
-         Vector_add(this->processes2, process);
-      } else {
-         Vector_insert(this->processes2, 0, process);
-      }
-
-      assert(Vector_size(this->processes2) == s + 1); (void)s;
+      Vector_add(this->displayList, process);
 
       int nextIndent = indent | (1 << level);
-      ProcessList_buildTreeBranch(this, process->pid, level + 1, (i < size - 1) ? nextIndent : indent, direction, show ? process->showChildren : false, node_counter, node_index);
-      if (i == size - 1) {
+      ProcessList_buildTreeBranch(this, process->pid, level + 1, (i < lastShown) ? nextIndent : indent, process->show && process->showChildren);
+      if (i == lastShown) {
          process->indent = -nextIndent;
       } else {
          process->indent = nextIndent;
       }
 
-      int rht = (*node_counter)++;
-
-      process->tree_left = lft;
-      process->tree_right = rht;
       process->tree_depth = level + 1;
-      process->tree_index = index;
-      Hashtable_put(this->displayTreeSet, index, process);
    }
-   Vector_delete(children);
 }
 
-static long ProcessList_treeProcessCompare(const void* v1, const void* v2) {
+static int compareProcessByKnownParentThenNatural(const void* v1, const void* v2) {
    const Process* p1 = (const Process*)v1;
    const Process* p2 = (const Process*)v2;
 
-   return SPACESHIP_NUMBER(p1->tree_left, p2->tree_left);
-}
+   int result = SPACESHIP_NUMBER(
+      p1->isRoot ? 0 : Process_getParentPid(p1),
+      p2->isRoot ? 0 : Process_getParentPid(p2)
+   );
 
-static long ProcessList_treeProcessCompareByPID(const void* v1, const void* v2) {
-   const Process *p1 = (const Process*)v1;
-   const Process *p2 = (const Process*)v2;
+   if (result != 0)
+      return result;
 
-   return SPACESHIP_NUMBER(p1->pid, p2->pid);
+   return Process_compare(v1, v2);
 }
 
 // Builds a sorted tree from scratch, without relying on previously gathered information
 static void ProcessList_buildTree(ProcessList* this) {
-   int node_counter = 1;
-   int node_index = 0;
-   int direction = Settings_getActiveDirection(this->settings);
+   Vector_prune(this->displayList);
 
-   // Sort by PID
-   Vector_quickSortCustomCompare(this->processes, ProcessList_treeProcessCompareByPID);
+   // Mark root processes
    int vsize = Vector_size(this->processes);
-
-   // Find all processes whose parent is not visible
-   int size;
-   while ((size = Vector_size(this->processes))) {
-      int i;
-      for (i = 0; i < size; i++) {
+   for (int i = 0; i < vsize; i++) {
       Process* process = (Process*)Vector_get(this->processes, i);
-
-         // Immediately consume processes hidden from view
-         if (!process->show) {
-            process = (Process*)Vector_take(this->processes, i);
-            process->indent = 0;
-            process->tree_depth = 0;
-            process->tree_left = node_counter++;
-            process->tree_index = node_index++;
-            Vector_add(this->processes2, process);
-            ProcessList_buildTreeBranch(this, process->pid, 0, 0, direction, false, &node_counter, &node_index);
-            process->tree_right = node_counter++;
-            Hashtable_put(this->displayTreeSet, process->tree_index, process);
-            break;
-         }
-
       pid_t ppid = Process_getParentPid(process);
-
-         // Bisect the process vector to find parent
-         int l = 0;
-         int r = size;
+      process->isRoot = false;
 
       // If PID corresponds with PPID (e.g. "kernel_task" (PID:0, PPID:0)
-         // on Mac OS X 10.11.6) cancel bisecting and regard this process as
-         // root.
-         if (process->pid == ppid)
-            r = 0;
+      // on Mac OS X 10.11.6) regard this process as root.
+      if (process->pid == ppid) {
+         process->isRoot = true;
+         continue;
+      }
 
       // On Linux both the init process (pid 1) and the root UMH kernel thread (pid 2)
       // use a ppid of 0. As that PID can't exist, we can skip searching for it.
-         if (!ppid)
-            r = 0;
+      if (!ppid) {
+         process->isRoot = true;
+         continue;
+      }
 
-         while (l < r) {
-            int c = (l + r) / 2;
-            pid_t pid = ((Process*)Vector_get(this->processes, c))->pid;
-            if (ppid == pid) {
-               break;
-            } else if (ppid < pid) {
-               r = c;
-            } else {
-               l = c + 1;
-            }
+      // We don't know about its parent for whatever reason
+      if (ProcessList_findProcess(this, ppid) == NULL)
+         process->isRoot = true;
    }
 
+   // Sort by known parent PID (roots first), then PID
+   Vector_quickSortCustomCompare(this->processes, compareProcessByKnownParentThenNatural);
+
+   // Find all processes whose parent is not visible
+   for (int i = 0; i < vsize; i++) {
+      Process* process = (Process*)Vector_get(this->processes, i);
+
       // If parent not found, then construct the tree with this node as root
-         if (l >= r) {
-            process = (Process*)Vector_take(this->processes, i);
+      if (process->isRoot) {
+         process = (Process*)Vector_get(this->processes, i);
          process->indent = 0;
          process->tree_depth = 0;
-            process->tree_left = node_counter++;
-            process->tree_index = node_index++;
-            Vector_add(this->processes2, process);
-            Hashtable_put(this->displayTreeSet, process->tree_index, process);
-            ProcessList_buildTreeBranch(this, process->pid, 0, 0, direction, process->showChildren, &node_counter, &node_index);
-            process->tree_right = node_counter++;
-            break;
+         Vector_add(this->displayList, process);
+         ProcessList_buildTreeBranch(this, process->pid, 0, 0, process->showChildren);
+         continue;
       }
    }
 
-      // There should be no loop in the process tree
-      assert(i < size);
-   }
-
-   // Swap listings around
-   Vector* t = this->processes;
-   this->processes = this->processes2;
-   this->processes2 = t;
+   this->needsSort = false;
 
    // Check consistency of the built structures
-   assert(Vector_size(this->processes) == vsize); (void)vsize;
-   assert(Vector_size(this->processes2) == 0);
+   assert(Vector_size(this->displayList) == vsize); (void)vsize;
 }
 
-void ProcessList_sort(ProcessList* this) {
-   if (this->settings->treeView) {
-      ProcessList_updateTreeSet(this);
-      Vector_quickSortCustomCompare(this->processes, ProcessList_treeProcessCompare);
+void ProcessList_updateDisplayList(ProcessList* this) {
+   if (this->settings->ss->treeView) {
+      if (this->needsSort)
+         ProcessList_buildTree(this);
    } else {
+      if (this->needsSort)
          Vector_insertionSort(this->processes);
+      Vector_prune(this->displayList);
+      int size = Vector_size(this->processes);
+      for (int i = 0; i < size; i++)
+         Vector_add(this->displayList, Vector_get(this->processes, i));
    }
+   this->needsSort = false;
 }
 
 ProcessField ProcessList_keyAt(const ProcessList* this, int at) {
    int x = 0;
-   const ProcessField* fields = this->settings->fields;
+   const ProcessField* fields = this->settings->ss->fields;
    ProcessField field;
    for (int i = 0; (field = fields[i]); i++) {
-      int len = strlen(alignedProcessFieldTitle(field));
+      int len = strlen(alignedProcessFieldTitle(this, field));
       if (at >= x && at <= x + len) {
          return field;
       }
@@ -482,51 +357,94 @@ void ProcessList_expandTree(ProcessList* this) {
    }
 }
 
+// Called on collapse-all toggle and on startup, possibly in non-tree mode
+void ProcessList_collapseAllBranches(ProcessList* this) {
+   ProcessList_buildTree(this); // Update `tree_depth` fields of the processes
+   this->needsSort = true; // ProcessList is sorted by parent now, force new sort
+   int size = Vector_size(this->processes);
+   for (int i = 0; i < size; i++) {
+      Process* process = (Process*) Vector_get(this->processes, i);
+      // FreeBSD has pid 0 = kernel and pid 1 = init, so init has tree_depth = 1
+      if (process->tree_depth > 0 && process->pid > 1)
+         process->showChildren = false;
+   }
+}
+
 void ProcessList_rebuildPanel(ProcessList* this) {
+   ProcessList_updateDisplayList(this);
+
    const char* incFilter = this->incFilter;
 
-   int currPos = Panel_getSelectedIndex(this->panel);
-   pid_t currPid = this->following != -1 ? this->following : 0;
-   int currScrollV = this->panel->scrollV;
+   const int currPos = Panel_getSelectedIndex(this->panel);
+   const int currScrollV = this->panel->scrollV;
+   const int currSize = Panel_size(this->panel);
 
    Panel_prune(this->panel);
-   int size = ProcessList_size(this);
+
+   /* Follow main process if followed a userland thread and threads are now hidden */
+   const Settings* settings = this->settings;
+   if (this->following != -1 && settings->hideUserlandThreads) {
+      const Process* followedProcess = (const Process*) Hashtable_get(this->processTable, this->following);
+      if (followedProcess && Process_isThread(followedProcess) && Hashtable_get(this->processTable, followedProcess->tgid) != NULL) {
+         this->following = followedProcess->tgid;
+      }
+   }
+
+   const int processCount = Vector_size(this->displayList);
    int idx = 0;
-   for (int i = 0; i < size; i++) {
-      Process* p = ProcessList_get(this, i);
+   bool foundFollowed = false;
+
+   for (int i = 0; i < processCount; i++) {
+      Process* p = (Process*) Vector_get(this->displayList, i);
 
       if ( (!p->show)
          || (this->userId != (uid_t) -1 && (p->st_uid != this->userId))
-         || (incFilter && !(String_contains_i(Process_getCommand(p), incFilter)))
+         || (incFilter && !(String_contains_i(Process_getCommand(p), incFilter, true)))
          || (this->pidMatchList && !Hashtable_get(this->pidMatchList, p->tgid)) )
          continue;
 
       Panel_set(this->panel, idx, (Object*)p);
-      if ((this->following == -1 && idx == currPos) || (this->following != -1 && p->pid == currPid)) {
+
+      if (this->following != -1 && p->pid == this->following) {
+         foundFollowed = true;
          Panel_setSelected(this->panel, idx);
          this->panel->scrollV = currScrollV;
       }
       idx++;
    }
+
+   if (this->following != -1 && !foundFollowed) {
+      /* Reset if current followed pid not found */
+      this->following = -1;
+      Panel_setSelectionColor(this->panel, PANEL_SELECTION_FOCUS);
+   }
+
+   if (this->following == -1) {
+      /* If the last item was selected, keep the new last item selected */
+      if (currPos > 0 && currPos == currSize - 1)
+         Panel_setSelected(this->panel, Panel_size(this->panel) - 1);
+      else
+         Panel_setSelected(this->panel, currPos);
+
+      this->panel->scrollV = currScrollV;
+   }
 }
 
 Process* ProcessList_getProcess(ProcessList* this, pid_t pid, bool* preExisting, Process_New constructor) {
    Process* proc = (Process*) Hashtable_get(this->processTable, pid);
-   *preExisting = proc;
+   *preExisting = proc != NULL;
    if (proc) {
-      assert(Vector_indexOf(this->processes, proc, Process_pidCompare) != -1);
+      assert(Vector_indexOf(this->processes, proc, Process_pidEqualCompare) != -1);
       assert(proc->pid == pid);
    } else {
       proc = constructor(this->settings);
-      assert(proc->comm == NULL);
+      assert(proc->cmdline == NULL);
       proc->pid = pid;
    }
    return proc;
 }
 
 void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
-   struct timespec now;
-
    // in pause mode only gather global data for meters (CPU/memory/...)
    if (pauseProcessUpdate) {
       ProcessList_goThroughEntries(this, true);
@@ -546,48 +464,48 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
    this->kernelThreads = 0;
    this->runningTasks = 0;
 
+   Process_resetFieldWidths();
 
-   // set scanTs
+   // set scan timestamp
    static bool firstScanDone = false;
-   if (!firstScanDone) {
-      this->scanTs = 0;
+   if (firstScanDone) {
+      Platform_gettime_monotonic(&this->monotonicMs);
+   } else {
+      this->monotonicMs = 0;
       firstScanDone = true;
-   } else if (Compat_clock_monotonic_gettime(&now) == 0) {
-      // save time in millisecond, so with a delay in deciseconds
-      // there are no irregularities
-      this->scanTs = 1000 * now.tv_sec + now.tv_nsec / 1000000;
    }
 
    ProcessList_goThroughEntries(this, false);
 
+   uid_t maxUid = 0;
    for (int i = Vector_size(this->processes) - 1; i >= 0; i--) {
       Process* p = (Process*) Vector_get(this->processes, i);
-      if (p->tombTs > 0) {
+      Process_makeCommandStr(p);
+
+      // keep track of the highest UID for column scaling
+      if (p->st_uid > maxUid)
+         maxUid = p->st_uid;
+
+      if (p->tombStampMs > 0) {
          // remove tombed process
-         if (this->scanTs >= p->tombTs) {
-            ProcessList_remove(this, p);
+         if (this->monotonicMs >= p->tombStampMs) {
+            ProcessList_removeIndex(this, p, i);
          }
       } else if (p->updated == false) {
          // process no longer exists
          if (this->settings->highlightChanges && p->wasShown) {
             // mark tombed
-            p->tombTs = this->scanTs + 1000 * this->settings->highlightDelaySecs;
+            p->tombStampMs = this->monotonicMs + 1000 * this->settings->highlightDelaySecs;
          } else {
             // immediately remove
-            ProcessList_remove(this, p);
+            ProcessList_removeIndex(this, p, i);
          }
-      } else {
-         p->updated = false;
       }
    }
 
-   if (this->settings->treeView) {
-      // Clear out the hashtable to avoid any left-over processes from previous build
-      //
-      // The sorting algorithm relies on the fact that
-      // len(this->displayTreeSet) == len(this->processes)
-      Hashtable_clear(this->displayTreeSet);
+   // Compact the processes vector in case of any deletions
+   Vector_compact(this->processes);
 
-      ProcessList_buildTree(this);
-   }
+   // Set UID column width based on max UID.
+   Process_setUidColumnWidth(maxUid);
 }

ProcessList.h

@@ -3,13 +3,16 @@
 /*
 htop - ProcessList.h
 (C) 2004,2005 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
 #include "config.h" // IWYU pragma: keep
 
+#include <limits.h>
 #include <stdbool.h>
+#include <stdint.h>
+#include <sys/time.h>
 #include <sys/types.h>
 
 #include "Hashtable.h"
@@ -34,16 +37,26 @@ in the source distribution for its full text.
 #define MAX_READ 2048
 #endif
 
+typedef unsigned long long int memory_t;
+#define MEMORY_MAX ULLONG_MAX
+
 typedef struct ProcessList_ {
    const Settings* settings;
 
-   Vector* processes;
-   Vector* processes2;
-   Hashtable* processTable;
+   Vector* processes;         /* all known processes; sort order can vary and differ from display order */
+   Vector* displayList;       /* process tree flattened in display order (borrowed);
+                                 updated in ProcessList_updateDisplayList when rebuilding panel */
+   Hashtable* processTable;   /* fast known process lookup by PID */
    UsersTable* usersTable;
 
-   Hashtable* displayTreeSet;
-   Hashtable* draftingTreeSet;
+   bool needsSort;
+
+   Hashtable* dynamicMeters;  /* runtime-discovered meters */
+   Hashtable* dynamicColumns; /* runtime-discovered Columns */
+
+   struct timeval realtime;   /* time of the current sample */
+   uint64_t realtimeMs;       /* current time in milliseconds */
+   uint64_t monotonicMs;      /* same, but from monotonic clock */
 
    Panel* panel;
    int following;
@@ -56,55 +69,59 @@ typedef struct ProcessList_ {
    bool topologyOk;
    #endif
 
-   int totalTasks;
-   int runningTasks;
-   int userlandThreads;
-   int kernelThreads;
+   unsigned int totalTasks;
+   unsigned int runningTasks;
+   unsigned int userlandThreads;
+   unsigned int kernelThreads;
 
-   unsigned long long int totalMem;
-   unsigned long long int usedMem;
-   unsigned long long int buffersMem;
-   unsigned long long int cachedMem;
-   unsigned long long int totalSwap;
-   unsigned long long int usedSwap;
-   unsigned long long int freeSwap;
+   memory_t totalMem;
+   memory_t usedMem;
+   memory_t buffersMem;
+   memory_t cachedMem;
+   memory_t sharedMem;
+   memory_t availableMem;
 
-   int cpuCount;
+   memory_t totalSwap;
+   memory_t usedSwap;
+   memory_t cachedSwap;
 
-   time_t scanTs;
+   unsigned int activeCPUs;
+   unsigned int existingCPUs;
 } ProcessList;
 
-ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidMatchList, uid_t userId);
+/* Implemented by platforms */
+ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* dynamicColumns, Hashtable* pidMatchList, uid_t userId);
 void ProcessList_delete(ProcessList* pl);
 void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate);
+bool ProcessList_isCPUonline(const ProcessList* super, unsigned int id);
 
 
-ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, UsersTable* usersTable, Hashtable* pidMatchList, uid_t userId);
+ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* dynamicColumns, Hashtable* pidMatchList, uid_t userId);
 
 void ProcessList_done(ProcessList* this);
 
 void ProcessList_setPanel(ProcessList* this, Panel* panel);
 
-void ProcessList_printHeader(ProcessList* this, RichString* header);
+void ProcessList_printHeader(const ProcessList* this, RichString* header);
 
 void ProcessList_add(ProcessList* this, Process* p);
 
-void ProcessList_remove(ProcessList* this, Process* p);
-
-Process* ProcessList_get(ProcessList* this, int idx);
-
-int ProcessList_size(ProcessList* this);
-
-void ProcessList_sort(ProcessList* this);
+void ProcessList_updateDisplayList(ProcessList* this);
 
 ProcessField ProcessList_keyAt(const ProcessList* this, int at);
 
 void ProcessList_expandTree(ProcessList* this);
 
+void ProcessList_collapseAllBranches(ProcessList* this);
+
 void ProcessList_rebuildPanel(ProcessList* this);
 
 Process* ProcessList_getProcess(ProcessList* this, pid_t pid, bool* preExisting, Process_New constructor);
 
 void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate);
 
+static inline Process* ProcessList_findProcess(ProcessList* this, pid_t pid) {
+   return (Process*) Hashtable_get(this->processTable, pid);
+}
+
 #endif

ProcessLocksScreen.c

@@ -1,7 +1,7 @@
 /*
 htop - ProcessLocksScreen.c
 (C) 2020 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -27,7 +27,7 @@ ProcessLocksScreen* ProcessLocksScreen_new(const Process* process) {
       this->pid = process->tgid;
    else
       this->pid = process->pid;
-   return (ProcessLocksScreen*) InfoScreen_init(&this->super, process, NULL, LINES-3, "        ID  TYPE       EXCLUSION  READ/WRITE DEVICE:INODE                              START                  END  FILENAME");
+   return (ProcessLocksScreen*) InfoScreen_init(&this->super, process, NULL, LINES - 2, "        ID  TYPE       EXCLUSION  READ/WRITE DEVICE:INODE                              START                  END  FILENAME");
 }
 
 void ProcessLocksScreen_delete(Object* this) {

ProcessLocksScreen.h

@@ -3,7 +3,7 @@
 /*
 htop - ProcessLocksScreen.h
 (C) 2020 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

ProvideCurses.h

@@ -3,7 +3,7 @@
 /*
 htop - RichString.h
 (C) 2004,2011 Hisham H. Muhammad
-Released under the GNU GPL, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -12,7 +12,7 @@ in the source distribution for its full text.
 
 // IWYU pragma: begin_exports
 
-#ifdef HAVE_NCURSESW_CURSES_H
+#if defined(HAVE_NCURSESW_CURSES_H)
 #include <ncursesw/curses.h>
 #elif defined(HAVE_NCURSES_NCURSES_H)
 #include <ncurses/ncurses.h>