Update ChangeLog

The Portable Linux Processor Affinity (PLPA) project has been depreciated in
favour of the Portable Hardware Locality (hwloc) project. So the license
exception present in previous versions of htop is obsolete and thus removed.

The text of COPYING has been updated to the latest upstream license text
of GPL-2 from the Free Software Foundation, Inc. (FSF).
There are only editorial changes like line wrapping, removing page breaks,
updating the "19yy" to "<year>" and changing the FSF address.

.github/FUNDING.yml

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

.github/workflows/ci.yml

@@ -13,11 +13,11 @@ jobs:
     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
@@ -26,31 +26,72 @@ 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 --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-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-delayacct --enable-sensors --enable-capabilities'
+
+  build-ubuntu-latest-full-featured-clang:
+    runs-on: ubuntu-latest
+    env:
+      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/focal/ llvm-toolchain-focal-12 main' -y
+        sudo apt-get update -q
+    - name: Install Dependencies
+      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-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-delayacct --enable-sensors --enable-capabilities'
+
+  build-ubuntu-latest-gcc-static:
     runs-on: ubuntu-latest
     # Enable LTO, might trigger additional warnings on advanced inlining
     env:
@@ -59,57 +100,51 @@ jobs:
     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 libtinfo-dev libgpm-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-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-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-static --enable-werror --enable-openvz --enable-vserver --enable-ancient-vserver --enable-unicode --disable-hwloc --disable-delayacct --enable-sensors --enable-capabilities'
 
-  build-ubuntu-latest-full-featured-clang:
-    runs-on: ubuntu-latest
-    env:
-      CC: clang-11
+  build-ubuntu-latest-pcp:
+    # Turns out 'ubuntu-latest' can be older than 20.04, we want PCP v5+
+    runs-on: ubuntu-20.04
     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 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 libpcp3-dev libncursesw5-dev libtinfo-dev libgpm-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
+      # Until Ubuntu catches up with pcp-5.2.3+, cannot use -werror due to:
+      # passing argument 2 of ‘pmLookupName’ from incompatible pointer type
+      run: ./configure --enable-pcp --enable-unicode
     - 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'
 
   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/

Action.c

@@ -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"
@@ -34,26 +35,25 @@ 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;
@@ -63,11 +63,11 @@ Object* Action_pickFromVector(State* st, Panel* list, int x, bool followProcess)
       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);
 
@@ -84,12 +84,8 @@ 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);
    ScreenManager_delete(scr);
    if (st->settings->changed) {
       Header_writeBackToSettings(st->header);
@@ -141,7 +137,7 @@ 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;
 
@@ -168,16 +164,25 @@ static Htop_Reaction actionSetSortColumn(State* st) {
    Htop_Reaction reaction = HTOP_OK;
    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 ProcessField* fields = st->settings->fields;
+   Hashtable* dynamicColumns = st->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))
          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);
    }
@@ -207,12 +212,12 @@ 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) {
@@ -227,34 +232,47 @@ 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;
-   }
 
-   ProcessList_expandTree(st->pl);
+   if (!st->settings->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) {
+   st->settings->allBranchesCollapsed = !st->settings->allBranchesCollapsed;
+   if (st->settings->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);
+   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;
 }
 
@@ -262,11 +280,11 @@ static Htop_Reaction actionInvertSortOrder(State* st) {
    Settings_invertSortOrder(st->settings);
    if (st->pauseProcessUpdate)
       ProcessList_sort(st->pl);
-   return HTOP_REFRESH | HTOP_SAVE_SETTINGS;
+   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;
 }
 
@@ -274,7 +292,7 @@ static Htop_Reaction actionCollapseIntoParent(State* st) {
    if (!st->settings->treeView) {
       return HTOP_OK;
    }
-   bool changed = collapseIntoParent(st->panel);
+   bool changed = collapseIntoParent((Panel*)st->mainPanel);
    return changed ? HTOP_RECALCULATE : HTOP_OK;
 }
 
@@ -287,13 +305,14 @@ 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;
 
@@ -303,33 +322,36 @@ 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) {
+   if (Settings_isReadonly())
+      return HTOP_OK;
+
    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, State_hideFunctionBar(st));
-         refresh();
-         MainPanel_foreachProcess((MainPanel*)st->panel, Process_sendSignal, (Arg) { .i = sgn->key }, NULL);
-         napms(500);
-      }
+   const ListItem* sgn = (ListItem*) Action_pickFromVector(st, signalsPanel, 14, true);
+   if (sgn && sgn->key != 0) {
+      Panel_setHeader((Panel*)st->mainPanel, "Sending...");
+      Panel_draw((Panel*)st->mainPanel, false, true, true, State_hideFunctionBar(st));
+      refresh();
+      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;
@@ -342,7 +364,7 @@ static Htop_Reaction actionFilterByUser(State* st) {
    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;
@@ -355,22 +377,21 @@ 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;
 
@@ -383,8 +404,9 @@ 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);
@@ -394,7 +416,10 @@ 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;
 
@@ -410,12 +435,12 @@ 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;
 }
 
@@ -431,49 +456,51 @@ 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 = "N P M T: ", .info = "sort by PID, CPU%, MEM% or TIME" },
-   { .key = "      I: ", .info = "invert sort order" },
-   { .key = " F6 > .: ", .info = "select sort column" },
+   { .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 = "  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 = false, .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 }
 };
 
@@ -483,8 +510,6 @@ 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]);
 
@@ -501,7 +526,7 @@ static Htop_Reaction actionHelp(State* st) {
    mvaddstr(line++, 0, "CPU usage bar: ");
 
    addattrstr(CRT_colors[BAR_BORDER], "[");
-   if (settings->detailedCPUTime) {
+   if (st->settings->detailedCPUTime) {
       addattrstr(CRT_colors[CPU_NICE_TEXT], "low"); addstr("/");
       addattrstr(CRT_colors[CPU_NORMAL], "normal"); addstr("/");
       addattrstr(CRT_colors[CPU_SYSTEM], "kernel"); addstr("/");
@@ -515,8 +540,8 @@ static Htop_Reaction actionHelp(State* st) {
       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%");
+      addattrstr(CRT_colors[CPU_GUEST], "virtualized");
+      addattrstr(CRT_colors[BAR_SHADOW], "             used%");
    }
    addattrstr(CRT_colors[BAR_BORDER], "]");
    attrset(CRT_colors[DEFAULT_COLOR]);
@@ -524,14 +549,21 @@ static Htop_Reaction actionHelp(State* st) {
    addattrstr(CRT_colors[BAR_BORDER], "[");
    addattrstr(CRT_colors[MEMORY_USED], "used"); addstr("/");
    addattrstr(CRT_colors[MEMORY_BUFFERS_TEXT], "buffers"); addstr("/");
+   addattrstr(CRT_colors[MEMORY_SHARED], "shared"); addstr("/");
    addattrstr(CRT_colors[MEMORY_CACHE], "cache");
-   addattrstr(CRT_colors[BAR_SHADOW], "                            used/total");
+   addattrstr(CRT_colors[BAR_SHADOW], "                     used/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");
+#ifdef HTOP_LINUX
+   addattrstr(CRT_colors[BAR_SHADOW], "/");
+   addattrstr(CRT_colors[SWAP_CACHE], "cache");
+   addattrstr(CRT_colors[BAR_SHADOW], "                                    used/total");
+#else
    addattrstr(CRT_colors[BAR_SHADOW], "                                          used/total");
+#endif
    addattrstr(CRT_colors[BAR_BORDER], "]");
    attrset(CRT_colors[DEFAULT_COLOR]);
    mvaddstr(line++, 0, "Type and layout of header meters are configurable in the setup screen.");
@@ -544,26 +576,28 @@ static Htop_Reaction actionHelp(State* st) {
 
    line++;
 
+   const bool readonly = Settings_isReadonly();
+
    int item;
    for (item = 0; helpLeft[item].key; item++) {
-      attrset(CRT_colors[DEFAULT_COLOR]);
+      attrset((helpLeft[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[DEFAULT_COLOR]);
       mvaddstr(line + item, 10, helpLeft[item].info);
-      attrset(CRT_colors[HELP_BOLD]);
+      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]);
+         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]);
+         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]);
+      attrset((helpRight[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[HELP_BOLD]);
       mvaddstr(line + item, 41, helpRight[item].key);
-      attrset(CRT_colors[DEFAULT_COLOR]);
+      attrset((helpRight[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[DEFAULT_COLOR]);
       mvaddstr(line + item, 50, helpRight[item].info);
    }
    line += MAXIMUM(leftHelpItems, item);
@@ -576,28 +610,28 @@ 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;
 
@@ -610,7 +644,7 @@ 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;
 
@@ -624,6 +658,7 @@ static Htop_Reaction actionShowCommandScreen(State* st) {
 
 void Action_setBindings(Htop_Action* keys) {
    keys[' '] = actionTag;
+   keys['*'] = actionExpandOrCollapseAllBranches;
    keys['+'] = actionExpandOrCollapse;
    keys[','] = actionSetSortColumn;
    keys['-'] = actionExpandOrCollapse;

Action.h

@@ -20,22 +20,26 @@ 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_SAVE_SETTINGS = 0x04,
-   HTOP_KEEP_FOLLOWING = 0x08,
-   HTOP_QUIT = 0x10,
-   HTOP_REDRAW_BAR = 0x20,
-   HTOP_UPDATE_PANELHDR = 0x41, // implies HTOP_REFRESH
+   HTOP_OK              = 0x00,
+   HTOP_REFRESH         = 0x01,
+   HTOP_RECALCULATE     = 0x02 | HTOP_REFRESH,
+   HTOP_SAVE_SETTINGS   = 0x04,
+   HTOP_KEEP_FOLLOWING  = 0x08,
+   HTOP_QUIT            = 0x10,
+   HTOP_REDRAW_BAR      = 0x20,
+   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;

Affinity.c

@@ -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;
 }
@@ -40,26 +40,26 @@ 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 {
@@ -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

@@ -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

@@ -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;
+   unsigned int i;
    hwloc_bitmap_foreach_begin(i, this->workCpuset)
    Affinity_add(affinity, 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

@@ -7,13 +7,14 @@ 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

@@ -7,15 +7,17 @@ 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;
@@ -43,10 +54,9 @@ 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));
-         Panel_setSelected(this->columns, at+1);
+         AvailableColumnsPanel_insert(this, at, selected->key);
+         Panel_setSelected(this->columns, at + 1);
          ColumnsPanel_update(this->columns);
          result = HANDLED;
          break;
@@ -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

@@ -7,8 +7,10 @@ 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

@@ -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;
@@ -76,8 +80,9 @@ static HandlerResult AvailableMetersPanel_eventHandler(Panel* super, int ch) {
    if (update) {
       this->settings->changed = true;
       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 +95,51 @@ 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 +147,24 @@ 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

@@ -7,24 +7,28 @@ 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

@@ -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

@@ -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

@@ -1,12 +1,12 @@
-		    GNU GENERAL PUBLIC LICENSE
-		       Version 2, June 1991
+                    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.
 
-			    Preamble
+                            Preamble
 
   The licenses for most software are designed to take away your
 freedom to share and change it.  By contrast, the GNU General Public
@@ -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
@@ -55,8 +55,8 @@ 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
+
+                    GNU GENERAL PUBLIC LICENSE
    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
   0. This License applies to any program or other work which contains
@@ -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
@@ -255,7 +255,7 @@ make exceptions for this.  Our decision will be guided by the two goals
 of preserving the free status of all derivatives of our free software and
 of promoting the sharing and reuse of software generally.
 
-			    NO WARRANTY
+                            NO WARRANTY
 
   11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
@@ -277,9 +277,9 @@ YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
 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
+                     END OF TERMS AND CONDITIONS
+
+            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

@@ -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, sizeof(length), "%s %u", Meter_uiName(this), this->param);
+   else
+      xSnprintf(buffer, sizeof(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,
@@ -351,6 +379,7 @@ const MeterClass AllCPUs2Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
@@ -370,6 +399,7 @@ const MeterClass LeftCPUsMeter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
@@ -389,6 +419,7 @@ const MeterClass RightCPUsMeter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
@@ -408,6 +439,7 @@ const MeterClass LeftCPUs2Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
@@ -427,6 +459,7 @@ const MeterClass RightCPUs2Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
@@ -446,6 +479,7 @@ const MeterClass AllCPUs4Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
@@ -465,6 +499,7 @@ const MeterClass LeftCPUs4Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
@@ -484,6 +519,7 @@ const MeterClass RightCPUs4Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
@@ -503,6 +539,7 @@ const MeterClass AllCPUs8Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
@@ -522,6 +559,7 @@ const MeterClass LeftCPUs8Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
@@ -541,6 +579,7 @@ const MeterClass RightCPUs8Meter_class = {
       .delete = Meter_delete,
       .display = CPUMeter_display
    },
+   .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
    .total = 100.0,
    .attributes = CPUMeter_attributes,

CPUMeter.h

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include "Meter.h"
 
+
 typedef enum {
    CPU_METER_NICE = 0,
    CPU_METER_NORMAL = 1,

CRT.c

@@ -10,6 +10,7 @@ in the source distribution for its full text.
 #include "CRT.h"
 
 #include <errno.h>
+#include <fcntl.h>
 #include <langinfo.h>
 #include <signal.h>
 #include <stdio.h>
@@ -24,6 +25,10 @@ in the source distribution for its full text.
 #include <execinfo.h>
 #endif
 
+#if !defined(NDEBUG) && defined(HAVE_MEMFD_CREATE)
+#include <sys/mman.h>
+#endif
+
 
 #define ColorIndex(i,j) ((7-(i))*8+(j))
 
@@ -76,6 +81,7 @@ bool CRT_utf8 = false;
 
 const char* const* CRT_treeStr = CRT_treeStrAscii;
 
+static const Settings* CRT_crashSettings;
 static const int* CRT_delay;
 
 const char* CRT_degreeSign;
@@ -114,6 +120,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [UPTIME] = A_BOLD | ColorPair(Cyan, Black),
       [BATTERY] = A_BOLD | ColorPair(Cyan, Black),
       [LARGE_NUMBER] = A_BOLD | ColorPair(Red, Black),
+      [METER_SHADOW] = A_BOLD | ColorPairGrayBlack,
       [METER_TEXT] = ColorPair(Cyan, Black),
       [METER_VALUE] = A_BOLD | ColorPair(Cyan, Black),
       [METER_VALUE_ERROR] = A_BOLD | ColorPair(Red, Black),
@@ -144,17 +151,24 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [BAR_BORDER] = A_BOLD,
       [BAR_SHADOW] = A_BOLD | ColorPairGrayBlack,
       [SWAP] = ColorPair(Red, Black),
+      [SWAP_CACHE] = ColorPair(Yellow, Black),
       [GRAPH_1] = A_BOLD | ColorPair(Cyan, Black),
       [GRAPH_2] = ColorPair(Cyan, Black),
       [MEMORY_USED] = ColorPair(Green, Black),
       [MEMORY_BUFFERS] = ColorPair(Blue, Black),
       [MEMORY_BUFFERS_TEXT] = A_BOLD | ColorPair(Blue, Black),
       [MEMORY_CACHE] = ColorPair(Yellow, Black),
+      [MEMORY_SHARED] = ColorPair(Magenta, Black),
+      [HUGEPAGE_1] = ColorPair(Green, Black),
+      [HUGEPAGE_2] = ColorPair(Yellow, Black),
+      [HUGEPAGE_3] = ColorPair(Red, Black),
+      [HUGEPAGE_4] = ColorPair(Blue, Black),
       [LOAD_AVERAGE_FIFTEEN] = ColorPair(Cyan, Black),
       [LOAD_AVERAGE_FIVE] = A_BOLD | ColorPair(Cyan, Black),
       [LOAD_AVERAGE_ONE] = A_BOLD | ColorPair(White, Black),
       [LOAD] = A_BOLD,
       [HELP_BOLD] = A_BOLD | ColorPair(Cyan, Black),
+      [HELP_SHADOW] = A_BOLD | ColorPairGrayBlack,
       [CLOCK] = A_BOLD,
       [DATE] = A_BOLD,
       [DATETIME] = A_BOLD,
@@ -182,6 +196,15 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [ZFS_COMPRESSED] = ColorPair(Blue, Black),
       [ZFS_RATIO] = ColorPair(Magenta, Black),
       [ZRAM] = ColorPair(Yellow, Black),
+      [DYNAMIC_GRAY] = ColorPairGrayBlack,
+      [DYNAMIC_DARKGRAY] = A_BOLD | ColorPairGrayBlack,
+      [DYNAMIC_RED] = ColorPair(Red, Black),
+      [DYNAMIC_GREEN] = ColorPair(Green, Black),
+      [DYNAMIC_BLUE] = ColorPair(Blue, Black),
+      [DYNAMIC_CYAN] = ColorPair(Cyan, Black),
+      [DYNAMIC_MAGENTA] = ColorPair(Magenta, Black),
+      [DYNAMIC_YELLOW] = ColorPair(Yellow, Black),
+      [DYNAMIC_WHITE] = ColorPair(White, Black),
    },
    [COLORSCHEME_MONOCHROME] = {
       [RESET_COLOR] = A_NORMAL,
@@ -199,6 +222,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [UPTIME] = A_BOLD,
       [BATTERY] = A_BOLD,
       [LARGE_NUMBER] = A_BOLD,
+      [METER_SHADOW] = A_DIM,
       [METER_TEXT] = A_NORMAL,
       [METER_VALUE] = A_BOLD,
       [METER_VALUE_ERROR] = A_BOLD,
@@ -229,17 +253,24 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [BAR_BORDER] = A_BOLD,
       [BAR_SHADOW] = A_DIM,
       [SWAP] = A_BOLD,
+      [SWAP_CACHE] = A_NORMAL,
       [GRAPH_1] = A_BOLD,
       [GRAPH_2] = A_NORMAL,
       [MEMORY_USED] = A_BOLD,
       [MEMORY_BUFFERS] = A_NORMAL,
       [MEMORY_BUFFERS_TEXT] = A_NORMAL,
       [MEMORY_CACHE] = A_NORMAL,
+      [MEMORY_SHARED] = A_NORMAL,
+      [HUGEPAGE_1] = A_BOLD,
+      [HUGEPAGE_2] = A_NORMAL,
+      [HUGEPAGE_3] = A_REVERSE | A_BOLD,
+      [HUGEPAGE_4] = A_REVERSE,
       [LOAD_AVERAGE_FIFTEEN] = A_DIM,
       [LOAD_AVERAGE_FIVE] = A_NORMAL,
       [LOAD_AVERAGE_ONE] = A_BOLD,
       [LOAD] = A_BOLD,
       [HELP_BOLD] = A_BOLD,
+      [HELP_SHADOW] = A_DIM,
       [CLOCK] = A_BOLD,
       [DATE] = A_BOLD,
       [DATETIME] = A_BOLD,
@@ -267,6 +298,15 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [ZFS_COMPRESSED] = A_BOLD,
       [ZFS_RATIO] = A_BOLD,
       [ZRAM] = A_NORMAL,
+      [DYNAMIC_GRAY] = A_DIM,
+      [DYNAMIC_DARKGRAY] = A_DIM,
+      [DYNAMIC_RED] = A_BOLD,
+      [DYNAMIC_GREEN] = A_NORMAL,
+      [DYNAMIC_BLUE] = A_NORMAL,
+      [DYNAMIC_CYAN] = A_BOLD,
+      [DYNAMIC_MAGENTA] = A_NORMAL,
+      [DYNAMIC_YELLOW] = A_NORMAL,
+      [DYNAMIC_WHITE] = A_BOLD,
    },
    [COLORSCHEME_BLACKONWHITE] = {
       [RESET_COLOR] = ColorPair(Black, White),
@@ -284,6 +324,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [UPTIME] = ColorPair(Yellow, White),
       [BATTERY] = ColorPair(Yellow, White),
       [LARGE_NUMBER] = ColorPair(Red, White),
+      [METER_SHADOW] = ColorPair(Blue, White),
       [METER_TEXT] = ColorPair(Blue, White),
       [METER_VALUE] = ColorPair(Black, White),
       [METER_VALUE_ERROR] = A_BOLD | ColorPair(Red, White),
@@ -314,17 +355,24 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [BAR_BORDER] = ColorPair(Blue, White),
       [BAR_SHADOW] = ColorPair(Black, White),
       [SWAP] = ColorPair(Red, White),
+      [SWAP_CACHE] = ColorPair(Yellow, White),
       [GRAPH_1] = A_BOLD | ColorPair(Blue, White),
       [GRAPH_2] = ColorPair(Blue, White),
       [MEMORY_USED] = ColorPair(Green, White),
       [MEMORY_BUFFERS] = ColorPair(Cyan, White),
       [MEMORY_BUFFERS_TEXT] = ColorPair(Cyan, White),
       [MEMORY_CACHE] = ColorPair(Yellow, White),
+      [MEMORY_SHARED] = ColorPair(Magenta, White),
+      [HUGEPAGE_1] = ColorPair(Green, White),
+      [HUGEPAGE_2] = ColorPair(Yellow, White),
+      [HUGEPAGE_3] = ColorPair(Red, White),
+      [HUGEPAGE_4] = ColorPair(Blue, White),
       [LOAD_AVERAGE_FIFTEEN] = ColorPair(Black, White),
       [LOAD_AVERAGE_FIVE] = ColorPair(Black, White),
       [LOAD_AVERAGE_ONE] = ColorPair(Black, White),
       [LOAD] = ColorPair(Black, White),
       [HELP_BOLD] = ColorPair(Blue, White),
+      [HELP_SHADOW] = A_BOLD | ColorPair(Black, White),
       [CLOCK] = ColorPair(Black, White),
       [DATE] = ColorPair(Black, White),
       [DATETIME] = ColorPair(Black, White),
@@ -351,7 +399,16 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [ZFS_OTHER] = ColorPair(Magenta, White),
       [ZFS_COMPRESSED] = ColorPair(Cyan, White),
       [ZFS_RATIO] = ColorPair(Magenta, White),
-      [ZRAM] = ColorPair(Yellow, White)
+      [ZRAM] = ColorPair(Yellow, White),
+      [DYNAMIC_GRAY] = ColorPair(Black, White),
+      [DYNAMIC_DARKGRAY] = A_BOLD | ColorPair(Black, White),
+      [DYNAMIC_RED] = ColorPair(Red, White),
+      [DYNAMIC_GREEN] = ColorPair(Green, White),
+      [DYNAMIC_BLUE] = ColorPair(Blue, White),
+      [DYNAMIC_CYAN] = ColorPair(Yellow, White),
+      [DYNAMIC_MAGENTA] = ColorPair(Magenta, White),
+      [DYNAMIC_YELLOW] = ColorPair(Yellow, White),
+      [DYNAMIC_WHITE] = A_BOLD | ColorPair(Black, White),
    },
    [COLORSCHEME_LIGHTTERMINAL] = {
       [RESET_COLOR] = ColorPair(Black, Black),
@@ -369,6 +426,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [UPTIME] = ColorPair(Yellow, Black),
       [BATTERY] = ColorPair(Yellow, Black),
       [LARGE_NUMBER] = ColorPair(Red, Black),
+      [METER_SHADOW] = A_BOLD | ColorPairGrayBlack,
       [METER_TEXT] = ColorPair(Blue, Black),
       [METER_VALUE] = ColorPair(Black, Black),
       [METER_VALUE_ERROR] = A_BOLD | ColorPair(Red, Black),
@@ -399,17 +457,24 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [BAR_BORDER] = ColorPair(Blue, Black),
       [BAR_SHADOW] = ColorPairGrayBlack,
       [SWAP] = ColorPair(Red, Black),
+      [SWAP_CACHE] = ColorPair(Yellow, Black),
       [GRAPH_1] = A_BOLD | ColorPair(Cyan, Black),
       [GRAPH_2] = ColorPair(Cyan, Black),
       [MEMORY_USED] = ColorPair(Green, Black),
       [MEMORY_BUFFERS] = ColorPair(Cyan, Black),
       [MEMORY_BUFFERS_TEXT] = ColorPair(Cyan, Black),
       [MEMORY_CACHE] = ColorPair(Yellow, Black),
+      [MEMORY_SHARED] = ColorPair(Magenta, Black),
+      [HUGEPAGE_1] = ColorPair(Green, Black),
+      [HUGEPAGE_2] = ColorPair(Yellow, Black),
+      [HUGEPAGE_3] = ColorPair(Red, Black),
+      [HUGEPAGE_4] = ColorPair(Blue, Black),
       [LOAD_AVERAGE_FIFTEEN] = ColorPair(Black, Black),
       [LOAD_AVERAGE_FIVE] = ColorPair(Black, Black),
       [LOAD_AVERAGE_ONE] = ColorPair(Black, Black),
       [LOAD] = ColorPairWhiteDefault,
       [HELP_BOLD] = ColorPair(Blue, Black),
+      [HELP_SHADOW] = A_BOLD | ColorPairGrayBlack,
       [CLOCK] = ColorPairWhiteDefault,
       [DATE] = ColorPairWhiteDefault,
       [DATETIME] = ColorPairWhiteDefault,
@@ -437,6 +502,15 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [ZFS_COMPRESSED] = ColorPair(Cyan, Black),
       [ZFS_RATIO] = A_BOLD | ColorPair(Magenta, Black),
       [ZRAM] = ColorPair(Yellow, Black),
+      [DYNAMIC_GRAY] = ColorPairGrayBlack,
+      [DYNAMIC_DARKGRAY] = A_BOLD | ColorPairGrayBlack,
+      [DYNAMIC_RED] = ColorPair(Red, Black),
+      [DYNAMIC_GREEN] = ColorPair(Green, Black),
+      [DYNAMIC_BLUE] = ColorPair(Blue, Black),
+      [DYNAMIC_CYAN] = ColorPair(Cyan, Black),
+      [DYNAMIC_MAGENTA] = ColorPair(Magenta, Black),
+      [DYNAMIC_YELLOW] = ColorPair(Yellow, Black),
+      [DYNAMIC_WHITE] = ColorPairWhiteDefault,
    },
    [COLORSCHEME_MIDNIGHT] = {
       [RESET_COLOR] = ColorPair(White, Blue),
@@ -454,6 +528,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [UPTIME] = A_BOLD | ColorPair(Yellow, Blue),
       [BATTERY] = A_BOLD | ColorPair(Yellow, Blue),
       [LARGE_NUMBER] = A_BOLD | ColorPair(Red, Blue),
+      [METER_SHADOW] = ColorPair(Cyan, Blue),
       [METER_TEXT] = ColorPair(Cyan, Blue),
       [METER_VALUE] = A_BOLD | ColorPair(Cyan, Blue),
       [METER_VALUE_ERROR] = A_BOLD | ColorPair(Red, Blue),
@@ -484,17 +559,24 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [BAR_BORDER] = A_BOLD | ColorPair(Yellow, Blue),
       [BAR_SHADOW] = ColorPair(Cyan, Blue),
       [SWAP] = ColorPair(Red, Blue),
+      [SWAP_CACHE] = A_BOLD | ColorPair(Yellow, Blue),
       [GRAPH_1] = A_BOLD | ColorPair(Cyan, Blue),
       [GRAPH_2] = ColorPair(Cyan, Blue),
       [MEMORY_USED] = A_BOLD | ColorPair(Green, Blue),
       [MEMORY_BUFFERS] = A_BOLD | ColorPair(Cyan, Blue),
       [MEMORY_BUFFERS_TEXT] = A_BOLD | ColorPair(Cyan, Blue),
       [MEMORY_CACHE] = A_BOLD | ColorPair(Yellow, Blue),
+      [MEMORY_SHARED] = A_BOLD | ColorPair(Magenta, Blue),
+      [HUGEPAGE_1] = A_BOLD | ColorPair(Green, Blue),
+      [HUGEPAGE_2] = A_BOLD | ColorPair(Yellow, Blue),
+      [HUGEPAGE_3] = A_BOLD | ColorPair(Red, Blue),
+      [HUGEPAGE_4] = A_BOLD | ColorPair(White, Blue),
       [LOAD_AVERAGE_FIFTEEN] = A_BOLD | ColorPair(Black, Blue),
       [LOAD_AVERAGE_FIVE] = A_NORMAL | ColorPair(White, Blue),
       [LOAD_AVERAGE_ONE] = A_BOLD | ColorPair(White, Blue),
       [LOAD] = A_BOLD | ColorPair(White, Blue),
       [HELP_BOLD] = A_BOLD | ColorPair(Cyan, Blue),
+      [HELP_SHADOW] = A_BOLD | ColorPair(Black, Blue),
       [CLOCK] = ColorPair(White, Blue),
       [DATE] = ColorPair(White, Blue),
       [DATETIME] = ColorPair(White, Blue),
@@ -522,6 +604,15 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [ZFS_COMPRESSED] = A_BOLD | ColorPair(White, Blue),
       [ZFS_RATIO] = A_BOLD | ColorPair(Magenta, Blue),
       [ZRAM] = A_BOLD | ColorPair(Yellow, Blue),
+      [DYNAMIC_GRAY] = ColorPairGrayBlack,
+      [DYNAMIC_DARKGRAY] = A_BOLD | ColorPairGrayBlack,
+      [DYNAMIC_RED] = ColorPair(Red, Blue),
+      [DYNAMIC_GREEN] = ColorPair(Green, Blue),
+      [DYNAMIC_BLUE] = ColorPair(Black, Blue),
+      [DYNAMIC_CYAN] = ColorPair(Cyan, Blue),
+      [DYNAMIC_MAGENTA] = ColorPair(Magenta, Blue),
+      [DYNAMIC_YELLOW] = ColorPair(Yellow, Blue),
+      [DYNAMIC_WHITE] = ColorPair(White, Blue),
    },
    [COLORSCHEME_BLACKNIGHT] = {
       [RESET_COLOR] = ColorPair(Cyan, Black),
@@ -539,6 +630,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [UPTIME] = ColorPair(Green, Black),
       [BATTERY] = ColorPair(Green, Black),
       [LARGE_NUMBER] = A_BOLD | ColorPair(Red, Black),
+      [METER_SHADOW] = A_BOLD | ColorPairGrayBlack,
       [METER_TEXT] = ColorPair(Cyan, Black),
       [METER_VALUE] = ColorPair(Green, Black),
       [METER_VALUE_ERROR] = A_BOLD | ColorPair(Red, Black),
@@ -569,17 +661,24 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [BAR_BORDER] = A_BOLD | ColorPair(Green, Black),
       [BAR_SHADOW] = ColorPair(Cyan, Black),
       [SWAP] = ColorPair(Red, Black),
+      [SWAP_CACHE] = ColorPair(Yellow, Black),
       [GRAPH_1] = A_BOLD | ColorPair(Green, Black),
       [GRAPH_2] = ColorPair(Green, Black),
       [MEMORY_USED] = ColorPair(Green, Black),
       [MEMORY_BUFFERS] = ColorPair(Blue, Black),
       [MEMORY_BUFFERS_TEXT] = A_BOLD | ColorPair(Blue, Black),
       [MEMORY_CACHE] = ColorPair(Yellow, Black),
+      [MEMORY_SHARED] = ColorPair(Magenta, Black),
+      [HUGEPAGE_1] = ColorPair(Green, Black),
+      [HUGEPAGE_2] = ColorPair(Yellow, Black),
+      [HUGEPAGE_3] = ColorPair(Red, Black),
+      [HUGEPAGE_4] = ColorPair(Blue, Black),
       [LOAD_AVERAGE_FIFTEEN] = ColorPair(Green, Black),
       [LOAD_AVERAGE_FIVE] = ColorPair(Green, Black),
       [LOAD_AVERAGE_ONE] = A_BOLD | ColorPair(Green, Black),
       [LOAD] = A_BOLD,
       [HELP_BOLD] = A_BOLD | ColorPair(Cyan, Black),
+      [HELP_SHADOW] = A_BOLD | ColorPairGrayBlack,
       [CLOCK] = ColorPair(Green, Black),
       [CHECK_BOX] = ColorPair(Green, Black),
       [CHECK_MARK] = A_BOLD | ColorPair(Green, Black),
@@ -605,6 +704,15 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [ZFS_COMPRESSED] = ColorPair(Blue, Black),
       [ZFS_RATIO] = ColorPair(Magenta, Black),
       [ZRAM] = ColorPair(Yellow, Black),
+      [DYNAMIC_GRAY] = ColorPairGrayBlack,
+      [DYNAMIC_DARKGRAY] = A_BOLD | ColorPairGrayBlack,
+      [DYNAMIC_RED] = ColorPair(Red, Black),
+      [DYNAMIC_GREEN] = ColorPair(Green, Black),
+      [DYNAMIC_BLUE] = ColorPair(Blue, Black),
+      [DYNAMIC_CYAN] = ColorPair(Cyan, Black),
+      [DYNAMIC_MAGENTA] = ColorPair(Magenta, Black),
+      [DYNAMIC_YELLOW] = ColorPair(Yellow, Black),
+      [DYNAMIC_WHITE] = ColorPair(White, Black),
    },
    [COLORSCHEME_BROKENGRAY] = { 0 } // dynamically generated.
 };
@@ -618,53 +726,139 @@ int CRT_scrollWheelVAmount = 10;
 ColorScheme CRT_colorScheme = COLORSCHEME_DEFAULT;
 
 ATTR_NORETURN
-static void CRT_handleSIGTERM(int sgn) {
-   (void) sgn;
+static void CRT_handleSIGTERM(ATTR_UNUSED int sgn) {
    CRT_done();
-   exit(0);
+   _exit(0);
 }
 
-#ifdef HAVE_SETUID_ENABLED
+#ifndef NDEBUG
 
-static int CRT_euid = -1;
+static int stderrRedirectNewFd = -1;
+static int stderrRedirectBackupFd = -1;
 
-static int CRT_egid = -1;
+static int createStderrCacheFile(void) {
+#if defined(HAVE_MEMFD_CREATE)
+   return memfd_create("htop.stderr-redirect", 0);
+#elif defined(O_TMPFILE)
+   return open("/tmp", O_TMPFILE | O_CREAT | O_EXCL | O_RDWR, S_IRUSR | S_IWUSR);
+#else
+   char tmpName[] = "htop.stderr-redirectXXXXXX";
+   mode_t curUmask = umask(S_IXUSR | S_IRWXG | S_IRWXO);
+   int r = mkstemp(tmpName);
+   umask(curUmask);
+   if (r < 0)
+      return r;
 
-void CRT_dropPrivileges() {
-   CRT_egid = getegid();
-   CRT_euid = geteuid();
-   if (setegid(getgid()) == -1) {
-      CRT_fatalError("Fatal error: failed dropping group privileges");
-   }
-   if (seteuid(getuid()) == -1) {
-      CRT_fatalError("Fatal error: failed dropping user privileges");
-   }
+   (void) unlink(tmpName);
+
+   return r;
+#endif /* HAVE_MEMFD_CREATE */
 }
 
-void CRT_restorePrivileges() {
-   if (CRT_egid == -1 || CRT_euid == -1) {
-      CRT_fatalError("Fatal error: internal inconsistency");
-   }
-   if (setegid(CRT_egid) == -1) {
-      CRT_fatalError("Fatal error: failed restoring group privileges");
-   }
-   if (seteuid(CRT_euid) == -1) {
-      CRT_fatalError("Fatal error: failed restoring user privileges");
+static void redirectStderr(void) {
+   stderrRedirectNewFd = createStderrCacheFile();
+   if (stderrRedirectNewFd < 0) {
+      /* ignore failure */
+      return;
    }
+
+   stderrRedirectBackupFd = dup(STDERR_FILENO);
+   dup2(stderrRedirectNewFd, STDERR_FILENO);
 }
 
-#endif /* HAVE_SETUID_ENABLED */
+static void dumpStderr(void) {
+   if (stderrRedirectNewFd < 0)
+      return;
+
+   fsync(STDERR_FILENO);
+   dup2(stderrRedirectBackupFd, STDERR_FILENO);
+   lseek(stderrRedirectNewFd, 0, SEEK_SET);
+
+   bool header = false;
+   char buffer[8192];
+   for (;;) {
+      errno = 0;
+      ssize_t res = read(stderrRedirectNewFd, buffer, sizeof(buffer));
+      if (res < 0) {
+         if (errno == EINTR)
+            continue;
+
+         break;
+      }
+
+      if (res == 0) {
+         break;
+      }
+
+      if (res > 0) {
+         if (!header) {
+            fprintf(stderr, ">>>>>>>>>> stderr output >>>>>>>>>>\n");
+            header = true;
+         }
+         (void)! write(STDERR_FILENO, buffer, res);
+      }
+   }
+
+   if (header)
+      fprintf(stderr, "\n<<<<<<<<<< stderr output <<<<<<<<<<\n");
+
+   close(stderrRedirectNewFd);
+   stderrRedirectNewFd = -1;
+}
+
+#else /* !NDEBUG */
+
+static void redirectStderr(void) {
+}
+
+static void dumpStderr(void) {
+}
+
+#endif /* !NDEBUG */
 
 static struct sigaction old_sig_handler[32];
 
-// TODO: pass an instance of Settings instead.
+static void CRT_installSignalHandlers(void) {
+   struct sigaction act;
+   sigemptyset (&act.sa_mask);
+   act.sa_flags = (int)SA_RESETHAND | SA_NODEFER;
+   act.sa_handler = CRT_handleSIGSEGV;
+   sigaction (SIGSEGV, &act, &old_sig_handler[SIGSEGV]);
+   sigaction (SIGFPE, &act, &old_sig_handler[SIGFPE]);
+   sigaction (SIGILL, &act, &old_sig_handler[SIGILL]);
+   sigaction (SIGBUS, &act, &old_sig_handler[SIGBUS]);
+   sigaction (SIGPIPE, &act, &old_sig_handler[SIGPIPE]);
+   sigaction (SIGSYS, &act, &old_sig_handler[SIGSYS]);
+   sigaction (SIGABRT, &act, &old_sig_handler[SIGABRT]);
+
+   signal(SIGINT, CRT_handleSIGTERM);
+   signal(SIGTERM, CRT_handleSIGTERM);
+   signal(SIGQUIT, CRT_handleSIGTERM);
+}
+
+void CRT_resetSignalHandlers(void) {
+   sigaction (SIGSEGV, &old_sig_handler[SIGSEGV], NULL);
+   sigaction (SIGFPE, &old_sig_handler[SIGFPE], NULL);
+   sigaction (SIGILL, &old_sig_handler[SIGILL], NULL);
+   sigaction (SIGBUS, &old_sig_handler[SIGBUS], NULL);
+   sigaction (SIGPIPE, &old_sig_handler[SIGPIPE], NULL);
+   sigaction (SIGSYS, &old_sig_handler[SIGSYS], NULL);
+   sigaction (SIGABRT, &old_sig_handler[SIGABRT], NULL);
+
+   signal(SIGINT, SIG_DFL);
+   signal(SIGTERM, SIG_DFL);
+   signal(SIGQUIT, SIG_DFL);
+}
+
+void CRT_init(const Settings* settings, bool allowUnicode) {
+   redirectStderr();
 
-void CRT_init(const int* delay, int colorScheme, bool allowUnicode) {
    initscr();
    noecho();
-   CRT_delay = delay;
-   CRT_colors = CRT_colorSchemes[colorScheme];
-   CRT_colorScheme = colorScheme;
+   CRT_crashSettings = settings;
+   CRT_delay = &(settings->delay);
+   CRT_colors = CRT_colorSchemes[settings->colorScheme];
+   CRT_colorScheme = settings->colorScheme;
 
    for (int i = 0; i < LAST_COLORELEMENT; i++) {
       unsigned int color = CRT_colorSchemes[COLORSCHEME_DEFAULT][i];
@@ -675,7 +869,9 @@ void CRT_init(const int* delay, int colorScheme, bool allowUnicode) {
    nonl();
    intrflush(stdscr, false);
    keypad(stdscr, true);
+#ifdef HAVE_GETMOUSE
    mouseinterval(0);
+#endif
    curs_set(0);
 
    if (has_colors()) {
@@ -698,6 +894,7 @@ void CRT_init(const int* delay, int colorScheme, bool allowUnicode) {
       define_key("\033OQ", KEY_F(2));
       define_key("\033OR", KEY_F(3));
       define_key("\033OS", KEY_F(4));
+      define_key("\033O2R", KEY_F(15));
       define_key("\033[11~", KEY_F(1));
       define_key("\033[12~", KEY_F(2));
       define_key("\033[13~", KEY_F(3));
@@ -711,20 +908,7 @@ void CRT_init(const int* delay, int colorScheme, bool allowUnicode) {
       }
    }
 
-   struct sigaction act;
-   sigemptyset (&act.sa_mask);
-   act.sa_flags = (int)SA_RESETHAND | SA_NODEFER;
-   act.sa_handler = CRT_handleSIGSEGV;
-   sigaction (SIGSEGV, &act, &old_sig_handler[SIGSEGV]);
-   sigaction (SIGFPE, &act, &old_sig_handler[SIGFPE]);
-   sigaction (SIGILL, &act, &old_sig_handler[SIGILL]);
-   sigaction (SIGBUS, &act, &old_sig_handler[SIGBUS]);
-   sigaction (SIGPIPE, &act, &old_sig_handler[SIGPIPE]);
-   sigaction (SIGSYS, &act, &old_sig_handler[SIGSYS]);
-   sigaction (SIGABRT, &act, &old_sig_handler[SIGABRT]);
-
-   signal(SIGTERM, CRT_handleSIGTERM);
-   signal(SIGQUIT, CRT_handleSIGTERM);
+   CRT_installSignalHandlers();
 
    use_default_colors();
    if (!has_colors())
@@ -747,10 +931,12 @@ void CRT_init(const int* delay, int colorScheme, bool allowUnicode) {
 #endif
       CRT_treeStrAscii;
 
+#ifdef HAVE_GETMOUSE
 #if NCURSES_MOUSE_VERSION > 1
    mousemask(BUTTON1_RELEASED | BUTTON4_PRESSED | BUTTON5_PRESSED, NULL);
 #else
    mousemask(BUTTON1_RELEASED, NULL);
+#endif
 #endif
 
    CRT_degreeSign = initDegreeSign();
@@ -759,6 +945,8 @@ void CRT_init(const int* delay, int colorScheme, bool allowUnicode) {
 void CRT_done() {
    curs_set(1);
    endwin();
+
+   dumpStderr();
 }
 
 void CRT_fatalError(const char* note) {
@@ -818,15 +1006,14 @@ void CRT_handleSIGSEGV(int signal) {
       "============================\n"
       "Please check at https://htop.dev/issues whether this issue has already been reported.\n"
       "If no similar issue has been reported before, please create a new issue with the following information:\n"
-      "\n"
-      "- Your htop version (htop --version)\n"
-      "- Your OS and kernel version (uname -a)\n"
-      "- Your distribution and release (lsb_release -a)\n"
-      "- Likely steps to reproduce (How did it happened?)\n"
+      "  - Your "PACKAGE" version: '"VERSION"'\n"
+      "  - Your OS and kernel version (uname -a)\n"
+      "  - Your distribution and release (lsb_release -a)\n"
+      "  - Likely steps to reproduce (How did it happen?)\n"
    );
 
 #ifdef HAVE_EXECINFO_H
-   fprintf(stderr, "- Backtrace of the issue (see below)\n");
+   fprintf(stderr, "  - Backtrace of the issue (see below)\n");
 #endif
 
    fprintf(stderr,
@@ -845,46 +1032,46 @@ void CRT_handleSIGSEGV(int signal) {
       signal, signal_str
    );
 
+   fprintf(stderr,
+      "Setting information:\n"
+      "--------------------\n");
+   Settings_write(CRT_crashSettings, true);
+   fprintf(stderr, "\n\n");
+
 #ifdef HAVE_EXECINFO_H
    fprintf(stderr,
       "Backtrace information:\n"
       "----------------------\n"
-      "The following function calls were active when the issue was detected:\n"
-      "---\n"
    );
 
-   void *backtraceArray[256];
+   void* backtraceArray[256];
 
    size_t size = backtrace(backtraceArray, ARRAYSIZE(backtraceArray));
-   backtrace_symbols_fd(backtraceArray, size, 2);
+   backtrace_symbols_fd(backtraceArray, size, STDERR_FILENO);
    fprintf(stderr,
-      "---\n"
       "\n"
-      "To make the above information more practical to work with,\n"
-      "you should provide a disassembly of your binary.\n"
+      "To make the above information more practical to work with, "
+      "please also provide a disassembly of your "PACKAGE" binary. "
       "This can usually be done by running the following command:\n"
       "\n"
    );
 
 #ifdef HTOP_DARWIN
-   fprintf(stderr, "   otool -tvV `which htop` > ~/htop.otool\n");
+   fprintf(stderr, "   otool -tvV `which "PACKAGE"` > ~/htop.otool\n");
 #else
-   fprintf(stderr, "   objdump -d -S -w `which htop` > ~/htop.objdump\n");
+   fprintf(stderr, "   objdump -d -S -w `which "PACKAGE"` > ~/htop.objdump\n");
 #endif
 
    fprintf(stderr,
       "\n"
       "Please include the generated file in your report.\n"
-      "\n"
    );
 #endif
 
    fprintf(stderr,
       "Running this program with debug symbols or inside a debugger may provide further insights.\n"
       "\n"
-      "Thank you for helping to improve htop!\n"
-      "\n"
-      "htop " VERSION " aborting.\n"
+      "Thank you for helping to improve "PACKAGE"!\n"
       "\n"
    );
 

CRT.h

@@ -13,6 +13,7 @@ in the source distribution for its full text.
 
 #include "Macros.h"
 #include "ProvideCurses.h"
+#include "Settings.h"
 
 
 typedef enum TreeStr_ {
@@ -52,6 +53,7 @@ typedef enum ColorElements_ {
    PANEL_SELECTION_FOLLOW,
    PANEL_SELECTION_UNFOCUS,
    LARGE_NUMBER,
+   METER_SHADOW,
    METER_TEXT,
    METER_VALUE,
    METER_VALUE_ERROR,
@@ -65,6 +67,7 @@ typedef enum ColorElements_ {
    BATTERY,
    TASKS_RUNNING,
    SWAP,
+   SWAP_CACHE,
    PROCESS,
    PROCESS_SHADOW,
    PROCESS_TAG,
@@ -90,6 +93,11 @@ 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,
@@ -101,6 +109,7 @@ typedef enum ColorElements_ {
    DATE,
    DATETIME,
    HELP_BOLD,
+   HELP_SHADOW,
    HOSTNAME,
    CPU_NICE,
    CPU_NICE_TEXT,
@@ -122,6 +131,15 @@ 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;
 
@@ -154,24 +172,12 @@ extern int CRT_scrollWheelVAmount;
 
 extern ColorScheme CRT_colorScheme;
 
-#ifdef HAVE_SETUID_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

@@ -17,11 +17,16 @@ in the source distribution for its full text.
 #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 "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 +65,36 @@ 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);
+   Panel* availableColumns = (Panel*) AvailableColumnsPanel_new(columns, this->settings->dynamicColumns);
    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 = "Columns", .ctor = CategoriesPanel_makeColumnsPage },
+   { .name = "Colors", .ctor = CategoriesPanel_makeColorsPage },
+};
+
 static HandlerResult CategoriesPanel_eventHandler(Panel* super, int ch) {
    CategoriesPanel* this = (CategoriesPanel*) super;
 
@@ -98,19 +132,8 @@ 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;
@@ -135,9 +158,10 @@ CategoriesPanel* CategoriesPanel_new(ScreenManager* scr, Settings* settings, Hea
    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));
+   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

@@ -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 +1,153 @@
+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 an version
+  identifying the minimum version of the configuration parser needed to
+  fully understand the configuration file format.
+  Old configuration file formats are automatically upgraded on startup.
+* 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
@@ -11,7 +161,7 @@ What's new in version 3.0.5
 * 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 (vor 5 Tagen)
+* LibSensors: add support for Ryzen CPUs
   (thanks to Matej Dian)
 * BUGFIX: Fix CPU percentage on M1 silicon Macs
   (thanks to Luke Groeninger)

ClockMeter.c

@@ -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

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include "Meter.h"
 
+
 extern const MeterClass ClockMeter_class;
 
 #endif

ColorsPanel.c

@@ -7,17 +7,16 @@ 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++)
@@ -86,14 +86,13 @@ 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

@@ -8,18 +8,17 @@ 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

@@ -7,11 +7,14 @@ 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"
@@ -115,6 +118,32 @@ const PanelClass ColumnsPanel_class = {
    .eventHandler = ColumnsPanel_eventHandler
 };
 
+typedef struct {
+   Panel* super;
+   unsigned int id;
+   unsigned int offset;
+} DynamicIterator;
+
+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));
+}
+
 ColumnsPanel* ColumnsPanel_new(Settings* settings) {
    ColumnsPanel* this = AllocThis(ColumnsPanel);
    Panel* super = (Panel*) this;
@@ -125,12 +154,11 @@ ColumnsPanel* ColumnsPanel_new(Settings* settings) {
    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));
-      }
-   }
+   Hashtable* dynamicColumns = settings->dynamicColumns;
+   const ProcessField* fields = settings->fields;
+   for (; *fields; fields++)
+      ColumnsPanel_add(super, *fields, dynamicColumns);
+
    return this;
 }
 
@@ -143,7 +171,8 @@ void ColumnsPanel_update(Panel* super) {
    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;
+      if (key < LAST_PROCESSFIELD)
+         this->settings->flags |= Process_fields[key].flags;
    }
    this->settings->fields[size] = 0;
 }

ColumnsPanel.h

@@ -12,6 +12,7 @@ in the source distribution for its full text.
 #include "Panel.h"
 #include "Settings.h"
 
+
 typedef struct ColumnsPanel_ {
    Panel super;
 

CommandLine.c

@@ -0,0 +1,402 @@
+/*
+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 <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"
+          "-M --no-mouse                   Disable the mouse\n"
+          "-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", name);
+   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 CommandLineSettings parseArguments(const char* program, int argc, char** argv) {
+
+   CommandLineSettings flags = {
+      .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);
+            exit(0);
+         case 'V':
+            printVersionFlag(program);
+            exit(0);
+         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);
+               }
+               exit(0);
+            }
+            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);
+               exit(1);
+            }
+            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);
+               exit(1);
+            }
+            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))) {
+               fprintf(stderr, "Error: invalid user \"%s\".\n", username);
+               exit(1);
+            }
+            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);
+                   exit(1);
+                }
+            }
+            flags.highlightChanges = true;
+            break;
+         }
+         case 128:
+            flags.readonly = true;
+            break;
+
+         default:
+           if (Platform_getLongOption(opt, argc, argv) == false)
+              exit(1);
+           break;
+      }
+   }
+   return flags;
+}
+
+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, "");
+
+   CommandLineSettings flags = parseArguments(name, argc, argv);
+
+   if (flags.readonly)
+      Settings_enableReadonly();
+
+   Platform_init();
+
+   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->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->treeView = false;
+      }
+      Settings_setSortKey(settings, flags.sortKey);
+   }
+
+   CRT_init(settings, flags.allowUnicode);
+
+   MainPanel* panel = MainPanel_new();
+   ProcessList_setPanel(pl, (Panel*) panel);
+
+   MainPanel_updateTreeFunctions(panel, settings->treeView);
+
+   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->allBranchesCollapsed)
+      ProcessList_collapseAllBranches(pl);
+
+   ScreenManager_run(scr, NULL, NULL);
+
+   attron(CRT_colors[RESET_COLOR]);
+   mvhline(LINES - 1, 0, ' ', COLS);
+   attroff(CRT_colors[RESET_COLOR]);
+   refresh();
+
+   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);
+   if (dc)
+      Hashtable_delete(dc);
+   if (dm)
+      Hashtable_delete(dm);
+
+   return 0;
+}

CommandLine.h

@@ -0,0 +1,14 @@
+#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.
+*/
+
+
+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) {

Compat.c

@@ -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

@@ -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

@@ -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

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include "Meter.h"
 
+
 extern const MeterClass DateMeter_class;
 
 #endif

DateTimeMeter.c

@@ -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

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include "Meter.h"
 
+
 extern const MeterClass DateTimeMeter_class;
 
 #endif

DiskIOMeter.c

@@ -9,12 +9,12 @@ 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 "Object.h"
 #include "Platform.h"
+#include "ProcessList.h"
 #include "RichString.h"
 #include "XUtils.h"
 
@@ -26,51 +26,55 @@ static const int DiskIOMeter_attributes[] = {
 };
 
 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 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 */
    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;
+      static uint64_t cached_read_total;
+      static uint64_t cached_write_total;
+      static uint64_t cached_msTimeSpend_total;
+      uint64_t diff;
 
-      cached_last_update = timeInMilliSeconds;
+      cached_last_update = pl->realtimeMs;
 
       DiskIOData data;
 
       hasData = Platform_getDiskIO(&data);
       if (!hasData) {
          this->values[0] = 0;
-         xSnprintf(buffer, len, "no data");
+         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;
       }
@@ -83,20 +87,21 @@ static void DiskIOMeter_updateValues(Meter* this, char* buffer, size_t len) {
    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) {
+static void DiskIOMeter_display(ATTR_UNUSED const Object* cast, RichString* out) {
    if (!hasData) {
       RichString_writeAscii(out, CRT_colors[METER_VALUE_ERROR], "no data");
       return;
    }
 
    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 +116,7 @@ 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

@@ -9,10 +9,11 @@ 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

@@ -72,8 +72,9 @@ static HandlerResult DisplayOptionsPanel_eventHandler(Panel* super, int ch) {
       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;
 }
@@ -98,6 +99,7 @@ DisplayOptionsPanel* DisplayOptionsPanel_new(Settings* settings, ScreenManager*
    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)));
+   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is collapsed by default", &(settings->allBranchesCollapsed)));
    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 +107,7 @@ 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", &(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 +119,24 @@ 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("- 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)));

DisplayOptionsPanel.h

@@ -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 +1,59 @@
+/*
+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();
+}
+
+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 +1,32 @@
+#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);
+
+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 +1,124 @@
+/*
+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();
+}
+
+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 +1,26 @@
+#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);
+
+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"
@@ -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;

FunctionBar.h

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include <stdbool.h>
 
+
 typedef struct FunctionBar_ {
    int size;
    char** functions;

Hashtable.c

@@ -11,7 +11,6 @@ in the source distribution for its full text.
 
 #include <assert.h>
 #include <stdint.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -19,6 +18,10 @@ in the source distribution for its full text.
 #include "Macros.h"
 #include "XUtils.h"
 
+#ifndef NDEBUG
+#include <stdio.h>
+#endif
+
 
 typedef struct HashtableItem_ {
    ht_key_t key;
@@ -95,7 +98,7 @@ static const uint64_t OEISprimes[] = {
    34359738337, 68719476731, 137438953447
 };
 
-static uint64_t nextPrime(size_t n) {
+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])

Header.c

@@ -7,12 +7,17 @@ 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 +43,119 @@ void Header_delete(Header* this) {
    Header_forEachColumn(this, i) {
       Vector_delete(this->columns[i]);
    }
+
    free(this->columns);
    free(this);
 }
 
-void Header_populateFromSettings(Header* this) {
-   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);
+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* end, dynamic[32] = {0};
+         if (sscanf(paren, "(%30s)", dynamic)) { // DynamicMeter
+            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) {
+      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, 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 +165,9 @@ 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 +175,6 @@ 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++) {
@@ -150,35 +187,94 @@ 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 width = COLS - pad;
    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;
+         if (meter->mode == TEXT_METERMODE) {
+            for (int j = 1; j < meter->columnWidthCount; j++) {
+               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);
    }
 }
 
+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);

Header.h

@@ -7,44 +7,42 @@ 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; (i_) < HeaderLayout_getColumns((this_)->headerLayout); ++(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 +1,77 @@
+#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_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 +1,87 @@
+/*
+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;
+
+      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, settings->hLayout), 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

@@ -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

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include "Meter.h"
 
+
 extern const MeterClass HostnameMeter_class;
 
 #endif

IncSet.c

@@ -29,6 +29,13 @@ void IncSet_reset(IncSet* this, IncType type) {
    IncMode_reset(&this->modes[type]);
 }
 
+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};
@@ -70,8 +77,8 @@ 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;
@@ -98,7 +105,7 @@ static void updateWeakPanel(IncSet* this, Panel* panel, Vector* lines) {
    }
 }
 
-static bool search(IncMode* mode, Panel* panel, IncMode_GetPanelValue getPanelValue) {
+static bool search(const IncMode* mode, 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)) {
@@ -110,7 +117,7 @@ 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) {
+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;
@@ -201,7 +208,7 @@ 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 : "";
 }
 

IncSet.h

@@ -14,6 +14,7 @@ in the source distribution for its full text.
 #include "Panel.h"
 #include "Vector.h"
 
+
 #define INCMODE_MAX 40
 
 typedef enum {
@@ -40,6 +41,8 @@ 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);

InfoScreen.c

@@ -4,7 +4,6 @@
 
 #include <stdarg.h>
 #include <stdio.h>
-#include <stdlib.h>
 #include <string.h>
 
 #include "CRT.h"
@@ -28,7 +27,7 @@ InfoScreen* InfoScreen_init(InfoScreen* this, const Process* process, FunctionBa
    }
    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;
 }
@@ -95,7 +94,9 @@ void InfoScreen_run(InfoScreen* this) {
       if (this->inc->active) {
          (void) move(LINES - 1, CRT_cursorX);
       }
+#ifdef HAVE_SET_ESCDELAY
       set_escdelay(25);
+#endif
       int ch = getch();
 
       if (ch == ERR) {
@@ -105,18 +106,29 @@ void InfoScreen_run(InfoScreen* this) {
          }
       }
 
+#ifdef HAVE_GETMOUSE
       if (ch == KEY_MOUSE) {
          MEVENT mevent;
          int ok = getmouse(&mevent);
          if (ok == OK) {
-            if (mevent.y >= panel->y && mevent.y < LINES - 1) {
-               Panel_setSelected(panel, mevent.y - panel->y + panel->scrollV);
-               ch = 0;
-            } else if (mevent.y == LINES - 1) {
-               ch = IncSet_synthesizeEvent(this->inc, mevent.x);
+            if (mevent.bstate & BUTTON1_RELEASED) {
+               if (mevent.y >= panel->y && mevent.y < LINES - 1) {
+                  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 +148,10 @@ 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 +166,10 @@ 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

@@ -31,11 +31,9 @@ static void ListItem_display(const Object* cast, RichString* out) {
    if (this->moving) {
       RichString_writeWide(out, CRT_colors[DEFAULT_COLOR],
 #ifdef HAVE_LIBNCURSESW
-                       CRT_utf8 ? "↕ " :
+                           CRT_utf8 ? "↕ " :
 #endif
-                       "+ ");
-   } else {
-      RichString_prune(out);
+                           "+ ");
    }
    RichString_appendWide(out, CRT_colors[DEFAULT_COLOR], this->value);
 }

ListItem.h

@@ -11,6 +11,7 @@ in the source distribution for its full text.
 
 #include "Object.h"
 
+
 typedef struct ListItem_ {
    Object super;
    char* value;

LoadAverageMeter.c

@@ -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"
 
@@ -36,7 +37,7 @@ static const int High_attributes[] = {
    METER_VALUE_ERROR
 };
 
-static void LoadAverageMeter_updateValues(Meter* this, char* buffer, size_t size) {
+static void LoadAverageMeter_updateValues(Meter* this) {
    Platform_getLoadAverage(&this->values[0], &this->values[1], &this->values[2]);
 
    // only show bar for 1min value
@@ -46,29 +47,31 @@ static void LoadAverageMeter_updateValues(Meter* this, char* buffer, size_t size
    if (this->values[0] < 1.0) {
       this->curAttributes = OK_attributes;
       this->total = 1.0;
-   } else if (this->values[0] < this->pl->cpuCount) {
+   } else if (this->values[0] < this->pl->activeCPUs) {
       this->curAttributes = Medium_attributes;
-      this->total = this->pl->cpuCount;
+      this->total = this->pl->activeCPUs;
    } else {
       this->curAttributes = High_attributes;
-      this->total = 2 * this->pl->cpuCount;
+      this->total = 2 * this->pl->activeCPUs;
    }
 
-   xSnprintf(buffer, size, "%.2f/%.2f/%.2f", this->values[0], this->values[1], this->values[2]);
+   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);
 
@@ -76,22 +79,24 @@ static void LoadMeter_updateValues(Meter* this, char* buffer, size_t size) {
    if (this->values[0] < 1.0) {
       this->curAttributes = OK_attributes;
       this->total = 1.0;
-   } else if (this->values[0] < this->pl->cpuCount) {
+   } else if (this->values[0] < this->pl->activeCPUs) {
       this->curAttributes = Medium_attributes;
-      this->total = this->pl->cpuCount;
+      this->total = this->pl->activeCPUs;
    } else {
       this->curAttributes = High_attributes;
-      this->total = 2 * this->pl->cpuCount;
+      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

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include "Meter.h"
 
+
 extern const MeterClass LoadAverageMeter_class;
 
 extern const MeterClass LoadMeter_class;

Macros.h

@@ -4,27 +4,31 @@
 #include <assert.h> // IWYU pragma: keep
 
 #ifndef MINIMUM
-#define MINIMUM(a, b)             ((a) < (b) ? (a) : (b))
+#define MINIMUM(a, b)                  ((a) < (b) ? (a) : (b))
 #endif
 
 #ifndef MAXIMUM
-#define MAXIMUM(a, b)             ((a) > (b) ? (a) : (b))
+#define MAXIMUM(a, b)                  ((a) > (b) ? (a) : (b))
 #endif
 
 #ifndef CLAMP
-#define CLAMP(x, low, high)       (assert((low) <= (high)), ((x) > (high)) ? (high) : MAXIMUM(x, low))
+#define CLAMP(x, low, high)            (assert((low) <= (high)), ((x) > (high)) ? (high) : MAXIMUM(x, low))
 #endif
 
 #ifndef ARRAYSIZE
-#define ARRAYSIZE(x)              (sizeof(x) / sizeof((x)[0]))
+#define ARRAYSIZE(x)                   (sizeof(x) / sizeof((x)[0]))
 #endif
 
 #ifndef SPACESHIP_NUMBER
-#define SPACESHIP_NUMBER(a, b)    (((a) > (b)) - ((a) < (b)))
+#define SPACESHIP_NUMBER(a, b)         (((a) > (b)) - ((a) < (b)))
 #endif
 
 #ifndef SPACESHIP_NULLSTR
-#define SPACESHIP_NULLSTR(a, b)   strcmp((a) ? (a) : "", (b) ? (b) : "")
+#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
@@ -33,6 +37,7 @@
 #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

@@ -21,18 +21,19 @@ in the source distribution for its full text.
 #include "XUtils.h"
 
 
-static const char* const MainFunctions[]  = {"Help  ", "Setup ", "Search", "Filter", "Tree  ", "SortBy", "Nice -", "Nice +", "Kill  ", "Quit  ", NULL};
+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) {
    FunctionBar* bar = MainPanel_getFunctionBar(this);
    FunctionBar_setLabel(bar, KEY_F(5), mode ? "List  " : "Tree  ");
 }
 
-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;
@@ -111,6 +112,9 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
    if (reaction & HTOP_REDRAW_BAR) {
       MainPanel_updateTreeFunctions(this, this->state->settings->treeView);
    }
+   if (reaction & HTOP_RESIZE) {
+      result |= RESIZE;
+   }
    if (reaction & HTOP_UPDATE_PANELHDR) {
       result |= REDRAW;
    }
@@ -134,7 +138,7 @@ 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;
    }
@@ -195,7 +199,7 @@ const PanelClass MainPanel_class = {
 
 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

@@ -34,8 +34,6 @@ typedef bool(*MainPanel_ForeachProcessFn)(Process*, Arg);
 
 void MainPanel_updateTreeFunctions(MainPanel* this, bool mode);
 
-void MainPanel_pidSearch(MainPanel* this, int ch);
-
 int MainPanel_selectedPid(MainPanel* this);
 
 bool MainPanel_foreachProcess(MainPanel* this, MainPanel_ForeachProcessFn fn, Arg arg, bool* wasAnyTagged);

Makefile.am

@@ -1,10 +1,14 @@
-AUTOMAKE_OPTIONS = subdir-objects
-
-bin_PROGRAMS = htop
-
 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 +16,7 @@ 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 +30,7 @@ myhtopsources = \
 	ClockMeter.c \
 	ColorsPanel.c \
 	ColumnsPanel.c \
+	CommandLine.c \
 	CommandScreen.c \
 	Compat.c \
 	CPUMeter.c \
@@ -34,18 +39,21 @@ 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 \
@@ -61,6 +69,7 @@ myhtopsources = \
 	Settings.c \
 	SignalsPanel.c \
 	SwapMeter.c \
+	SysArchMeter.c \
 	TasksMeter.c \
 	TraceScreen.c \
 	UptimeMeter.c \
@@ -81,16 +90,21 @@ 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 +113,7 @@ myhtopheaders = \
 	Macros.h \
 	MainPanel.h \
 	MemoryMeter.h \
+	MemorySwapMeter.h \
 	Meter.h \
 	MetersPanel.h \
 	NetworkIOMeter.h \
@@ -115,6 +130,7 @@ myhtopheaders = \
 	Settings.h \
 	SignalsPanel.h \
 	SwapMeter.h \
+	SysArchMeter.h \
 	TasksMeter.h \
 	TraceScreen.h \
 	UptimeMeter.h \
@@ -126,6 +142,10 @@ myhtopheaders = \
 # -----
 
 linux_platform_headers = \
+	generic/gettime.h \
+	generic/hostname.h \
+	generic/uname.h \
+	linux/HugePageMeter.h \
 	linux/IOPriority.h \
 	linux/IOPriorityPanel.h \
 	linux/LibSensors.h \
@@ -142,9 +162,11 @@ 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/HugePageMeter.c \
 	linux/IOPriorityPanel.c \
 	linux/LibSensors.c \
 	linux/LinuxProcess.c \
@@ -155,10 +177,13 @@ myhtopplatsources = \
 	linux/SystemdMeter.c \
 	linux/ZramMeter.c \
 	zfs/ZfsArcMeter.c \
-	zfs/ZfsArcStats.c \
 	zfs/ZfsCompressedArcMeter.c
 
+if HTOP_LINUX
+AM_LDFLAGS += -rdynamic
+myhtopplatprogram = htop
 myhtopplatheaders = $(linux_platform_headers)
+myhtopplatsources = $(linux_platform_sources)
 endif
 
 # FreeBSD
@@ -169,17 +194,29 @@ 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
-
+myhtopplatprogram = htop
 myhtopplatheaders = $(freebsd_platform_headers)
+myhtopplatsources = $(freebsd_platform_sources)
 endif
 
 # DragonFlyBSD
@@ -189,31 +226,75 @@ 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
-
+myhtopplatprogram = htop
 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
+myhtopplatprogram = htop
+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
+myhtopplatprogram = htop
 myhtopplatheaders = $(openbsd_platform_headers)
+myhtopplatsources = $(openbsd_platform_sources)
 endif
 
 # Darwin
@@ -224,59 +305,126 @@ darwin_platform_headers = \
 	darwin/DarwinProcessList.h \
 	darwin/Platform.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/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
-
+myhtopplatprogram = htop
 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
-
+myhtopplatprogram = htop
 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
+myhtopplatprogram = pcp-htop
+myhtopplatheaders = $(pcp_platform_headers)
+myhtopplatsources = $(pcp_platform_sources)
+pcp_htop_SOURCES  = $(myhtopplatprogram).c $(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
+myhtopplatprogram = htop
+myhtopplatsources = $(unsupported_platform_sources)
 myhtopplatheaders = $(unsupported_platform_headers)
 endif
 
 # ----
 
-htop_SOURCES  = $(myhtopheaders) $(myhtopplatheaders) $(myhtopsources) $(myhtopplatsources)
+bin_PROGRAMS = $(myhtopplatprogram)
+htop_SOURCES = $(myhtopplatprogram).c $(myhtopheaders) $(myhtopplatheaders) $(myhtopsources) $(myhtopplatsources)
 nodist_htop_SOURCES = config.h
 
 target:
@@ -286,10 +434,10 @@ 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

@@ -7,6 +7,9 @@ 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"
@@ -16,14 +19,24 @@ 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);
 
-   written = Meter_humanUnit(buffer, this->values[0], size);
+   /* Do not print available memory in bar mode */
+   this->curItems = 4;
+
+   written = Meter_humanUnit(buffer, isnan(this->values[4]) ? this->values[0] : this->total - this->values[4], size);
    METER_BUFFER_CHECK(buffer, size, written);
 
    METER_BUFFER_APPEND_CHR(buffer, size, '/');
@@ -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);
-   Meter_humanUnit(buffer, this->values[2], sizeof(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

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include "Meter.h"
 
+
 extern const MeterClass MemoryMeter_class;
 
 #endif

MemorySwapMeter.c

@@ -0,0 +1,102 @@
+/*
+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;
+
+   assert(data->memoryMeter->draw);
+   data->memoryMeter->draw(data->memoryMeter, x, y, w / 2);
+   assert(data->swapMeter->draw);
+   data->swapMeter->draw(data->swapMeter, x + w / 2, y, w - w / 2);
+}
+
+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,
+   .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

@@ -32,7 +32,7 @@ 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;
@@ -93,15 +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);
    }
 }
 
@@ -132,21 +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;
@@ -155,23 +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 - 1);
    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);
+   Meter_displayBuffer(this, &out);
    RichString_printoffnVal(out, y, x, 0, w - 1);
-   RichString_end(out);
+   RichString_delete(&out);
 }
 
 /* ---------- BarMeterMode ---------- */
@@ -179,13 +175,11 @@ 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));
-
+   const char* caption = Meter_getCaption(this);
    w -= 2;
    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]);
@@ -202,8 +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
@@ -217,7 +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);
@@ -264,7 +258,7 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
       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]);
@@ -293,12 +287,13 @@ static const char* const GraphMeterMode_dotsAscii[] = {
 };
 
 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;
@@ -313,29 +308,24 @@ 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;
    }
 
@@ -346,8 +336,10 @@ static void GraphMeterMode_draw(Meter* this, int x, int y, int w) {
    }
    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++) {
@@ -384,12 +376,10 @@ static const char* const* LEDMeterMode_digits;
 
 static void LEDMeterMode_drawDigit(int x, int y, int n) {
    for (int i = 0; i < 3; i++)
-      mvaddstr(y+i, x, LEDMeterMode_digits[i * 10 + n]);
+      mvaddstr(y + i, x, LEDMeterMode_digits[i * 10 + 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;
@@ -397,11 +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
@@ -409,21 +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 = {
@@ -461,14 +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

@@ -10,6 +10,7 @@ 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;
@@ -77,8 +83,11 @@ 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
@@ -86,7 +95,7 @@ typedef struct MeterClass_ {
 
 typedef struct GraphData_ {
    struct timeval time;
-   double values[METER_BUFFER_LEN];
+   double values[METER_GRAPHDATA_SIZE];
 } GraphData;
 
 struct Meter_ {
@@ -95,12 +104,14 @@ 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;
@@ -123,7 +134,7 @@ typedef enum {
 
 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);
 
@@ -133,7 +144,7 @@ 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

@@ -185,8 +185,7 @@ static HandlerResult MetersPanel_eventHandler(Panel* super, int ch) {
       Header* header = this->scr->header;
       this->settings->changed = true;
       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 +215,7 @@ 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;

NetworkIOMeter.c

@@ -1,13 +1,14 @@
 #include "NetworkIOMeter.h"
 
 #include <stdbool.h>
-#include <stddef.h>
-#include <sys/time.h>
+#include <stdint.h>
 
 #include "CRT.h"
 #include "Macros.h"
 #include "Object.h"
 #include "Platform.h"
+#include "Process.h"
+#include "ProcessList.h"
 #include "RichString.h"
 #include "XUtils.h"
 
@@ -19,71 +20,81 @@ static const int NetworkIOMeter_attributes[] = {
 
 static bool hasData = false;
 
-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 uint32_t cached_rxb_diff;
+static uint32_t cached_rxp_diff;
+static uint32_t cached_txb_diff;
+static uint32_t cached_txp_diff;
 
-static void NetworkIOMeter_updateValues(ATTR_UNUSED Meter* this, char* buffer, size_t len) {
-   static unsigned long long int cached_last_update = 0;
+static void NetworkIOMeter_updateValues(Meter* this) {
+   const ProcessList* pl = this->pl;
+   static uint64_t cached_last_update = 0;
 
-   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;
+   uint64_t passedTimeInMs = pl->realtimeMs - cached_last_update;
 
    /* update only every 500ms */
    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;
+      cached_last_update = pl->realtimeMs;
 
-      unsigned long int bytesReceived, packetsReceived, bytesTransmitted, packetsTransmitted;
-
-      hasData = Platform_getNetworkIO(&bytesReceived, &packetsReceived, &bytesTransmitted, &packetsTransmitted);
+      NetworkIOData data;
+      hasData = Platform_getNetworkIO(&data);
       if (!hasData) {
-         xSnprintf(buffer, len, "no data");
+         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;
+   }
+
+   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) {
@@ -93,6 +104,7 @@ static void NetworkIOMeter_display(ATTR_UNUSED const Object* cast, RichString* o
    }
 
    char buffer[64];
+   int len;
 
    RichString_writeAscii(out, CRT_colors[METER_TEXT], "rx: ");
    Meter_humanUnit(buffer, cached_rxb_diff, sizeof(buffer));
@@ -104,8 +116,8 @@ 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 +128,7 @@ 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

@@ -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

@@ -11,14 +11,11 @@ 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;
@@ -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.h

@@ -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

@@ -53,7 +53,7 @@ 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], " ");

Panel.c

@@ -69,7 +69,7 @@ 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_setSelectionColor(Panel* this, ColorElements colorId) {
@@ -172,13 +172,13 @@ 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);
@@ -246,8 +246,8 @@ void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelect
    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
@@ -269,7 +269,7 @@ 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);
@@ -287,7 +287,7 @@ 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) {
@@ -296,11 +296,11 @@ 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);
@@ -316,8 +316,8 @@ 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)) {
@@ -454,7 +454,7 @@ HandlerResult Panel_selectByTyping(Panel* this, int ch) {
 
       if (len < 99) {
          buffer[len] = ch;
-         buffer[len+1] = '\0';
+         buffer[len + 1] = '\0';
       }
 
       for (int try = 0; try < 2; try++) {

Panel.h

@@ -7,6 +7,9 @@ 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)
@@ -112,9 +116,9 @@ 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);
 

Process.h

@@ -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,
@@ -46,90 +48,242 @@ 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;
 
 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_ {
+   char* str;                                  /* merged Command string */
+   size_t highlightCount;                      /* how many portions of cmdline to highlight */
+   ProcessCmdlineHighlight highlights[8];      /* which portions of cmdline to highlight */
+   bool separateComm : 1;                      /* whether comm is a separate field */
+   bool unmatchedExe : 1;                      /* whether exe matched with cmdline */
+   bool cmdlineChanged : 1;                    /* whether cmdline changed */
+   bool exeChanged : 1;                        /* whether exe changed */
+   bool commChanged : 1;                       /* whether comm changed */
+   bool prevMergeSet : 1;                      /* whether showMergedCommand was set */
+   bool prevPathSet : 1;                       /* whether showProgramPath was set */
+   bool prevCommSet : 1;                       /* whether findCommInCmdline was set */
+   bool prevCmdlineSet : 1;                    /* whether stripExeFromCmdline was set */
+   bool prevShowThreadNames : 1;               /* whether showThreadNames was set */
+} 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;
 
+   /*
+    * Process state (platform dependent):
+    *   D  -  Waiting
+    *   I  -  Idle
+    *   L  -  Acquiring lock
+    *   R  -  Running
+    *   S  -  Sleeping
+    *   T  -  Stopped (on a signal)
+    *   X  -  Dead
+    *   Z  -  Zombie
+    *   t  -  Tracing stop
+    *   ?  -  Unknown
+    */
+   char 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_left;
    unsigned int tree_right;
    unsigned int tree_depth;
    unsigned int tree_index;
+
+   /*
+    * 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;
 } ProcessFieldData;
 
 // Implemented in platform-specific code:
 void Process_writeField(const Process* this, RichString* str, ProcessField field);
 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];
 #define PROCESS_MAX_PID_DIGITS 19
 extern int Process_pidDigits;
 
-typedef Process*(*Process_New)(const struct Settings_*);
+typedef Process* (*Process_New)(const struct Settings_*);
 typedef void (*Process_WriteField)(const Process*, RichString*, ProcessField);
 typedef int (*Process_CompareByKey)(const Process*, const Process*, ProcessField);
 typedef const char* (*Process_GetCommandStr)(const Process*);
@@ -143,7 +297,7 @@ typedef struct 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_getCommand(this_)                      (As_Process(this_)->getCommandStr ? As_Process(this_)->getCommandStr((const Process*)(this_)) : Process_getCommandStr((const Process*)(this_)))
 #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) {
@@ -154,31 +308,54 @@ 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);
+/* Takes number in bytes (base 1024). Prints 6 columns. */
+void Process_printBytes(RichString* str, unsigned long long number, bool coloring);
 
-void Process_colorNumber(RichString* str, unsigned long long number, bool coloring);
+/* Takes number in kilo bytes (base 1024). Prints 6 columns. */
+void Process_printKBytes(RichString* str, unsigned long long number, bool coloring);
 
-void Process_printTime(RichString* str, unsigned long long totalHundredths);
+/* 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_display(const Object* cast, RichString* out);
@@ -205,4 +382,17 @@ int Process_pidCompare(const void* v1, const void* v2);
 
 int Process_compareByKey_Base(const Process* p1, const Process* p2, ProcessField key);
 
+// Avoid direct calls, use Process_getCommand instead
+const char* Process_getCommandStr(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_getCommandStr */
+void Process_makeCommandStr(Process* this);
+
+void Process_writeCommand(const Process* this, int attr, int baseAttr, RichString* str);
+
 #endif

ProcessList.c

@@ -11,15 +11,16 @@ 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
 
@@ -29,13 +30,18 @@ ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, Users
 
    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;
@@ -79,7 +85,22 @@ 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) {
+   const DynamicColumn* column = Hashtable_get(this->dynamicColumns, key);
+   if (column == NULL)
+      return "- ";
+   static char titleBuffer[DYNAMIC_MAX_COLUMN_WIDTH + /* space */ 1 + /* null terminator */ + 1];
+   int width = column->width;
+   if (!width || abs(width) > DYNAMIC_MAX_COLUMN_WIDTH)
+      width = DYNAMIC_DEFAULT_COLUMN_WIDTH;
+   xSnprintf(titleBuffer, sizeof(titleBuffer), "%*s", width, column->heading);
+   return titleBuffer;
+}
+
+static const char* alignedProcessFieldTitle(const ProcessList* this, ProcessField field) {
+   if (field >= LAST_PROCESSFIELD)
+      return alignedDynamicColumnTitle(this, field);
+
    const char* title = Process_fields[field].title;
    if (!title)
       return "- ";
@@ -93,8 +114,8 @@ static const char* alignedProcessFieldTitle(ProcessField field) {
    return titleBuffer;
 }
 
-void ProcessList_printHeader(ProcessList* this, RichString* header) {
-   RichString_prune(header);
+void ProcessList_printHeader(const ProcessList* this, RichString* header) {
+   RichString_rewind(header, RichString_size(header));
 
    const Settings* settings = this->settings;
    const ProcessField* fields = settings->fields;
@@ -111,12 +132,12 @@ 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) == ' ') {
-         header->chlen--;  // rewind to override space
+         RichString_rewind(header, 1);  // rewind to override space
          RichString_appendnWide(header,
                                 CRT_colors[PANEL_SELECTION_FOCUS],
-                                CRT_treeStr[Settings_getActiveDirection(this->settings) == 1 ? TREE_STR_DESC : TREE_STR_ASC],
+                                CRT_treeStr[Settings_getActiveDirection(this->settings) == 1 ? TREE_STR_ASC : TREE_STR_DESC],
                                 1);
       }
       if (COMM == fields[i] && settings->showMergedCommand) {
@@ -131,7 +152,7 @@ void ProcessList_add(ProcessList* this, Process* p) {
    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);
@@ -141,11 +162,11 @@ void ProcessList_add(ProcessList* this, Process* p) {
    assert(Hashtable_count(this->processTable) == Vector_count(this->processes));
 }
 
-void ProcessList_remove(ProcessList* this, Process* p) {
+void ProcessList_remove(ProcessList* this, const Process* p) {
    assert(Vector_indexOf(this->processes, p, Process_pidCompare) != -1);
    assert(Hashtable_get(this->processTable, p->pid) != NULL);
 
-   Process* pp = Hashtable_remove(this->processTable, p->pid);
+   const Process* pp = Hashtable_remove(this->processTable, p->pid);
    assert(pp == p); (void)pp;
 
    pid_t pid = p->pid;
@@ -165,14 +186,6 @@ void ProcessList_remove(ProcessList* this, Process* p) {
    assert(Hashtable_count(this->processTable) == Vector_count(this->processes));
 }
 
-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.
 //
@@ -202,7 +215,7 @@ static void ProcessList_updateTreeSetLayer(ProcessList* this, unsigned int leftB
    if (layerSize == 0)
       return;
 
-   Vector* layer = Vector_new(this->processes->type, false, layerSize);
+   Vector* layer = Vector_new(Vector_type(this->processes), false, layerSize);
 
    // Find all processes on the same layer (process with the same `deep` value
    // and included in a range from `leftBound` to `rightBound`).
@@ -311,6 +324,11 @@ static void ProcessList_updateTreeSet(ProcessList* this) {
 }
 
 static void ProcessList_buildTreeBranch(ProcessList* this, pid_t pid, int level, int indent, int direction, bool show, int* node_counter, int* node_index) {
+   // On OpenBSD the kernel thread 'swapper' has pid 0.
+   // Do not treat it as root of any tree.
+   if (pid == 0)
+      return;
+
    Vector* children = Vector_new(Class(Process), false, DEFAULT_SIZE);
 
    for (int i = Vector_size(this->processes) - 1; i >= 0; i--) {
@@ -361,15 +379,15 @@ static void ProcessList_buildTreeBranch(ProcessList* this, pid_t pid, int level,
 }
 
 static int ProcessList_treeProcessCompare(const void* v1, const void* v2) {
-   const Process *p1 = (const Process*)v1;
-   const Process *p2 = (const Process*)v2;
+   const Process* p1 = (const Process*)v1;
+   const Process* p2 = (const Process*)v2;
 
    return SPACESHIP_NUMBER(p1->tree_left, p2->tree_left);
 }
 
 static int ProcessList_treeProcessCompareByPID(const void* v1, const void* v2) {
-   const Process *p1 = (const Process*)v1;
-   const Process *p2 = (const Process*)v2;
+   const Process* p1 = (const Process*)v1;
+   const Process* p2 = (const Process*)v2;
 
    return SPACESHIP_NUMBER(p1->pid, p2->pid);
 }
@@ -477,7 +495,7 @@ ProcessField ProcessList_keyAt(const ProcessList* this, int at) {
    const ProcessField* fields = this->settings->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;
       }
@@ -494,17 +512,40 @@ void ProcessList_expandTree(ProcessList* this) {
    }
 }
 
+void ProcessList_collapseAllBranches(ProcessList* this) {
+   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) {
    const char* incFilter = this->incFilter;
 
-   int currPos = Panel_getSelectedIndex(this->panel);
-   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->processes);
    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->processes, i);
 
       if ( (!p->show)
          || (this->userId != (uid_t) -1 && (p->st_uid != this->userId))
@@ -513,31 +554,47 @@ void ProcessList_rebuildPanel(ProcessList* this) {
          continue;
 
       Panel_set(this->panel, idx, (Object*)p);
-      if ((this->following == -1 && idx == currPos) || (this->following != -1 && p->pid == this->following)) {
+
+      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(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);
@@ -558,37 +615,35 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
    this->runningTasks = 0;
 
 
-   // 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);
 
    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);
+
+      if (p->tombStampMs > 0) {
          // remove tombed process
-         if (this->scanTs >= p->tombTs) {
+         if (this->monotonicMs >= p->tombStampMs) {
             ProcessList_remove(this, p);
          }
       } 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);
          }
-      } else {
-         p->updated = false;
       }
    }
 

ProcessList.h

@@ -9,7 +9,10 @@ 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"
@@ -34,6 +37,9 @@ 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;
 
@@ -45,6 +51,13 @@ typedef struct ProcessList_ {
    Hashtable* displayTreeSet;
    Hashtable* draftingTreeSet;
 
+   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;
    uid_t userId;
@@ -56,44 +69,44 @@ 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_remove(ProcessList* this, const Process* p);
 
 void ProcessList_sort(ProcessList* this);
 
@@ -101,10 +114,16 @@ 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

ProvideCurses.h

@@ -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>

README

@@ -3,9 +3,8 @@
 [![CI](https://github.com/htop-dev/htop/workflows/CI/badge.svg)](https://github.com/htop-dev/htop/actions)
 [![Coverity Scan Build Status](https://scan.coverity.com/projects/21665/badge.svg)](https://scan.coverity.com/projects/21665)
 [![Mailing List](https://img.shields.io/badge/Mailing%20List-htop-blue.svg)](https://groups.io/g/htop)
-[![IRC #htop](https://img.shields.io/badge/IRC-htop-blue.svg)](https://webchat.freenode.net/#htop)
+[![IRC #htop](https://img.shields.io/badge/IRC-htop-blue.svg)](https://web.libera.chat/#htop)
 [![Github Release](https://img.shields.io/github/release/htop-dev/htop.svg)](https://github.com/htop-dev/htop/releases/latest)
-[![Download](https://api.bintray.com/packages/htop/source/htop/images/download.svg)](https://bintray.com/htop/source/htop/_latestVersion)
 
 ![Screenshot of htop](docs/images/screenshot.png?raw=true)
 
@@ -25,25 +24,123 @@ For more information and details on how to contribute to `htop` visit [htop.dev]
 
 ## Build instructions
 
-This program is distributed as a standard GNU autotools-based package.
+### Prerequisite
+List of build-time dependencies:
+*  `build-essential` standard GNU autotools-based
+*  `autoconf`
+*  `autotools`
+*  `ncurses`
 
-Compiling `htop` requires the header files for `ncurses` (libncursesw*-dev). Install these and other required packages for C development from your package manager.
+**Note about `ncurses`:**
+> htop requires ncurses 6.0.  Be aware the appropriate package is sometimes still called libncurses5 (on Debian/Ubuntu). Also ncurses usually comes in two flavours:
+>* With Unicode support.
+>* Without Unicode support.
+>
+> This is also something that is reflected in the package name on Debian/Ubuntu (via the additional 'w' - 'w'ide character support).
 
-Then, when compiling from a [release tarball](https://bintray.com/htop/source/htop), run:
+List of additional build-time dependencies (based on feature flags):
+*  `sensors`
+*  `hwloc`
+*  `libcap`
 
+Compiling `htop` requires the header files for `ncurses` . Install these and other required packages for C development from your package manager.
+
+**Debian/Ubuntu**
 ~~~ shell
-./configure && make
+sudo apt install libncursesw5-dev autotools-dev autoconf
 ~~~
 
-Alternatively, for compiling sources downloaded from the Git repository (`git clone` or downloads from [Github releases](https://github.com/htop-dev/htop/releases/)),
-install the header files for `ncurses` (libncursesw*-dev) and other required development packages from your distribution's package manager. Then run:
+**Fedora/RHEL**
+~~~ shell
+sudo dnf install ncurses-devel automake autoconf
+~~~
 
+### Compiling from source:
+To compile from sources downloaded from the Git repository (`git clone` or downloads from [Github releases](https://github.com/htop-dev/htop/releases/)), then run:
 ~~~ shell
 ./autogen.sh && ./configure && make
 ~~~
 
 By default `make install` will install into `/usr/local`, for changing the path use `./configure --prefix=/some/path`.
 
+### Install
+To install on the local system run `make install`. By default `make install` installs into `/usr/local`. To change this path use `./configure --prefix=/some/path`.
+
+### Build Options
+
+`htop` has several build-time options to enable/disable additional features.
+
+#### Generic
+
+  * `--enable-unicode`:
+    enable Unicode support
+    dependency: *libncursesw*
+    default: *yes*
+  * `--enable-pcp`:
+    enable Performance Co-Pilot support via a new pcp-htop utility
+    dependency: *libpcp*
+    default: *no*
+  * `--enable-affinity`:
+    enable `sched_setaffinity(2)` and `sched_getaffinity(2)` for affinity support; conflicts with hwloc
+    default: *check*
+  * `--enable-hwloc`:
+    enable hwloc support for CPU affinity; disables affinity support
+    dependency: *libhwloc*
+    default: *no*
+  * `--enable-static`:
+    build a static htop binary; hwloc and delay accounting are not supported
+    default: *no*
+  * `--enable-debug`:
+    Enable asserts and internal sanity checks; implies a performance penalty
+    default: *no*
+
+#### Linux
+
+  * `--enable-sensors`:
+    enable libsensors(3) support for reading temperature data
+    dependencies: *libsensors-dev*(build-time), at runtime *libsensors* is loaded via `dlopen(3)` if available
+    default: *check*
+  * `--enable-capabilities`:
+    enable Linux capabilities support
+    dependency: *libcap*
+    default: *check*
+  * `--with-proc`:
+    location of a Linux-compatible proc filesystem
+    default: */proc*
+  * `--enable-openvz`:
+    enable OpenVZ support
+    default: *no*
+  * `--enable-vserver`:
+    enable VServer support
+    default: *no*
+  * `--enable-ancient-vserver`:
+    enable ancient VServer support (implies `--enable-vserver`)
+    default: *no*
+  * `--enable-delayacct`:
+    enable Linux delay accounting support
+    dependencies: *pkg-config*(build-time), *libnl-3* and *libnl-genl-3*
+    default: *check*
+
+
+## Runtime dependencies:
+`htop` has a set of fixed minimum runtime dependencies, which is kept as minimal as possible:
+* `ncurses` libraries for terminal handling (wide character support).
+
+### Runtime optional dependencies:
+`htop` has a set of fixed optional dependencies, depending on build/configure option used:
+* `libdl`, if not building static and support for some of the optional libraries is enabled, is always required when support for to optionally load dependencies (i.e. `libsensors`, `systemd`) is present.
+* `libcap`, user-space interfaces to the POSIX 1003.1e, is always required when `--enable-capabilities` was used to configure `htop`.
+* `libsensors`, readout of temperatures and CPU speeds, is optional even when `--enable-sensors` was used to configure `htop`.
+* `systemd` is optional when `--enable-static` was not used to configure `htop` (Linux only). If building statically and `libsystemd` is not found by `configure` support for the SystemD meter is disabled entirely.
+
+`htop` checks for the availability of the actual runtime lib as `htop` runs.
+
+**BSD**
+On most *BSD systems you also have `kvm` as a static requirement to read all the kernel information.
+
+More information on required and optional dependencies can be found in [configure.ac](configure.ac).
+
+## Usage
 See the manual page (`man htop`) or the on-line help ('F1' or 'h' inside `htop`) for a list of supported key commands.
 
 ## Support
@@ -54,7 +151,7 @@ If you have trouble running `htop` please consult your Operating System / Linux
 
 We have a [development mailing list](https://htop.dev/mailinglist.html). Feel free to subscribe for release announcements or asking questions on the development of htop.
 
-You can also join our IRC channel #htop on freenode and talk to the developers there.
+You can also join our IRC channel #htop on Libera.Chat and talk to the developers there.
 
 If you have found an issue with the source of htop, please check whether this has already been reported in our [Github issue tracker](https://github.com/htop-dev/htop/issues).
 If not, please file a new issue describing the problem you have found, the location in the source code you are referring to and a possible fix.

RichString.c

@@ -46,6 +46,10 @@ static void RichString_setLen(RichString* this, int len) {
    }
 }
 
+void RichString_rewind(RichString* this, int count) {
+   RichString_setLen(this, this->chlen - count);
+}
+
 #ifdef HAVE_LIBNCURSESW
 
 static inline int RichString_writeFromWide(RichString* this, int attrs, const char* data_c, int from, int len) {
@@ -60,7 +64,37 @@ static inline int RichString_writeFromWide(RichString* this, int attrs, const ch
       this->chptr[i] = (CharType) { .attr = attrs & 0xffffff, .chars = { (iswprint(data[j]) ? data[j] : '?') } };
    }
 
-   return wcswidth(data, len);
+   return len;
+}
+
+int RichString_appendnWideColumns(RichString* this, int attrs, const char* data_c, int len, int* columns) {
+   wchar_t data[len + 1];
+   len = mbstowcs(data, data_c, len);
+   if (len <= 0)
+      return 0;
+
+   int from = this->chlen;
+   int newLen = from + len;
+   RichString_setLen(this, newLen);
+   int columnsWritten = 0;
+   int pos = from;
+   for (int j = 0; j < len; j++) {
+      wchar_t c = iswprint(data[j]) ? data[j] : '?';
+      int cwidth = wcwidth(c);
+      if (cwidth > *columns)
+         break;
+
+      *columns -= cwidth;
+      columnsWritten += cwidth;
+
+      this->chptr[pos] = (CharType) { .attr = attrs & 0xffffff, .chars = { c, '\0' } };
+      pos++;
+   }
+
+   RichString_setLen(this, pos);
+   *columns = columnsWritten;
+
+   return pos - from;
 }
 
 static inline int RichString_writeFromAscii(RichString* this, int attrs, const char* data, int from, int len) {
@@ -80,9 +114,18 @@ inline void RichString_setAttrn(RichString* this, int attrs, int start, int char
    }
 }
 
-int RichString_findChar(RichString* this, char c, int start) {
-   wchar_t wc = btowc(c);
-   cchar_t* ch = this->chptr + start;
+void RichString_appendChr(RichString* this, int attrs, char c, int count) {
+   int from = this->chlen;
+   int newLen = from + count;
+   RichString_setLen(this, newLen);
+   for (int i = from; i < newLen; i++) {
+      this->chptr[i] = (CharType) { .attr = attrs, .chars = { c, 0 } };
+   }
+}
+
+int RichString_findChar(const RichString* this, char c, int start) {
+   const wchar_t wc = btowc(c);
+   const cchar_t* ch = this->chptr + start;
    for (int i = start; i < this->chlen; i++) {
       if (ch->chars[0] == wc)
          return i;
@@ -104,6 +147,12 @@ static inline int RichString_writeFromWide(RichString* this, int attrs, const ch
    return len;
 }
 
+int RichString_appendnWideColumns(RichString* this, int attrs, const char* data_c, int len, int* columns) {
+   int written = RichString_writeFromWide(this, attrs, data_c, this->chlen, MINIMUM(len, *columns));
+   *columns = written;
+   return written;
+}
+
 static inline int RichString_writeFromAscii(RichString* this, int attrs, const char* data_c, int from, int len) {
    return RichString_writeFromWide(this, attrs, data_c, from, len);
 }
@@ -115,8 +164,17 @@ void RichString_setAttrn(RichString* this, int attrs, int start, int charcount)
    }
 }
 
-int RichString_findChar(RichString* this, char c, int start) {
-   chtype* ch = this->chptr + start;
+void RichString_appendChr(RichString* this, int attrs, char c, int count) {
+   int from = this->chlen;
+   int newLen = from + count;
+   RichString_setLen(this, newLen);
+   for (int i = from; i < newLen; i++) {
+      this->chptr[i] = c | attrs;
+   }
+}
+
+int RichString_findChar(const RichString* this, char c, int start) {
+   const chtype* ch = this->chptr + start;
    for (int i = start; i < this->chlen; i++) {
       if ((*ch & 0xff) == (chtype) c)
          return i;
@@ -127,19 +185,10 @@ int RichString_findChar(RichString* this, char c, int start) {
 
 #endif /* HAVE_LIBNCURSESW */
 
-void RichString_prune(RichString* this) {
-   if (this->chlen > RICHSTRING_MAXLEN)
+void RichString_delete(RichString* this) {
+   if (this->chlen > RICHSTRING_MAXLEN) {
       free(this->chptr);
-   memset(this, 0, sizeof(RichString));
-   this->chptr = this->chstr;
-}
-
-void RichString_appendChr(RichString* this, char c, int count) {
-   int from = this->chlen;
-   int newLen = from + count;
-   RichString_setLen(this, newLen);
-   for (int i = from; i < newLen; i++) {
-      RichString_setChar(this, i, c);
+      this->chptr = this->chstr;
    }
 }
 

RichString.h

@@ -15,20 +15,25 @@ in the source distribution for its full text.
 #define RichString_size(this) ((this)->chlen)
 #define RichString_sizeVal(this) ((this).chlen)
 
-#define RichString_begin(this) RichString (this); RichString_beginAllocated(this)
-#define RichString_beginAllocated(this) do { memset(&(this), 0, sizeof(RichString)); (this).chptr = (this).chstr; } while(0)
-#define RichString_end(this) RichString_prune(&(this))
+#define RichString_begin(this) RichString this; RichString_beginAllocated(this)
+#define RichString_beginAllocated(this)   \
+   do {                                   \
+      (this).chlen = 0,                   \
+      (this).chptr = (this).chstr;        \
+      RichString_setChar(&(this), 0, 0);  \
+      (this).highlightAttr = 0;           \
+   } while(0)
 
 #ifdef HAVE_LIBNCURSESW
 #define RichString_printVal(this, y, x) mvadd_wchstr(y, x, (this).chptr)
 #define RichString_printoffnVal(this, y, x, off, n) mvadd_wchnstr(y, x, (this).chptr + (off), n)
-#define RichString_getCharVal(this, i) ((this).chptr[i].chars[0] & 255)
+#define RichString_getCharVal(this, i) ((this).chptr[i].chars[0])
 #define RichString_setChar(this, at, ch) do { (this)->chptr[(at)] = (CharType) { .chars = { ch, 0 } }; } while (0)
 #define CharType cchar_t
 #else
 #define RichString_printVal(this, y, x) mvaddchstr(y, x, (this).chptr)
 #define RichString_printoffnVal(this, y, x, off, n) mvaddchnstr(y, x, (this).chptr + (off), n)
-#define RichString_getCharVal(this, i) ((this).chptr[i])
+#define RichString_getCharVal(this, i) ((this).chptr[i] & 0xff)
 #define RichString_setChar(this, at, ch) do { (this)->chptr[(at)] = ch; } while (0)
 #define CharType chtype
 #endif
@@ -42,20 +47,27 @@ typedef struct RichString_ {
    int highlightAttr;
 } RichString;
 
+void RichString_delete(RichString* this);
+
+void RichString_rewind(RichString* this, int count);
+
 void RichString_setAttrn(RichString* this, int attrs, int start, int charcount);
 
-int RichString_findChar(RichString* this, char c, int start);
-
-void RichString_prune(RichString* this);
+int RichString_findChar(const RichString* this, char c, int start);
 
 void RichString_setAttr(RichString* this, int attrs);
 
-void RichString_appendChr(RichString* this, char c, int count);
+void RichString_appendChr(RichString* this, int attrs, char c, int count);
+
+/* All appending and writing functions return the number of written characters (not columns). */
 
 int RichString_appendWide(RichString* this, int attrs, const char* data);
 
 int RichString_appendnWide(RichString* this, int attrs, const char* data, int len);
 
+/* columns takes the maximum number of columns to write and contains on return the number of columns written. */
+int RichString_appendnWideColumns(RichString* this, int attrs, const char* data, int len, int* columns);
+
 int RichString_writeWide(RichString* this, int attrs, const char* data);
 
 int RichString_appendAscii(RichString* this, int attrs, const char* data);

ScreenManager.c

@@ -5,6 +5,8 @@ Released under the GNU GPLv2, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "config.h" // IWYU pragma: keep
+
 #include "ScreenManager.h"
 
 #include <assert.h>
@@ -15,6 +17,7 @@ in the source distribution for its full text.
 #include "CRT.h"
 #include "FunctionBar.h"
 #include "Object.h"
+#include "Platform.h"
 #include "ProcessList.h"
 #include "ProvideCurses.h"
 #include "XUtils.h"
@@ -24,7 +27,7 @@ ScreenManager* ScreenManager_new(Header* header, const Settings* settings, const
    ScreenManager* this;
    this = xMalloc(sizeof(ScreenManager));
    this->x1 = 0;
-   this->y1 = header->height;
+   this->y1 = 0;
    this->x2 = 0;
    this->y2 = -1;
    this->panels = Vector_new(Class(Panel), owner, DEFAULT_SIZE);
@@ -32,7 +35,6 @@ ScreenManager* ScreenManager_new(Header* header, const Settings* settings, const
    this->header = header;
    this->settings = settings;
    this->state = state;
-   this->owner = owner;
    this->allowFocusChange = true;
    return this;
 }
@@ -42,23 +44,23 @@ void ScreenManager_delete(ScreenManager* this) {
    free(this);
 }
 
-inline int ScreenManager_size(ScreenManager* this) {
+inline int ScreenManager_size(const ScreenManager* this) {
    return this->panelCount;
 }
 
 void ScreenManager_add(ScreenManager* this, Panel* item, int size) {
    int lastX = 0;
    if (this->panelCount > 0) {
-      Panel* last = (Panel*) Vector_get(this->panels, this->panelCount - 1);
+      const Panel* last = (const Panel*) Vector_get(this->panels, this->panelCount - 1);
       lastX = last->x + last->w + 1;
    }
-   int height = LINES - this->y1 + this->y2;
+   int height = LINES - this->y1 - (this->header ? this->header->height : 0) + this->y2;
    if (size > 0) {
       Panel_resize(item, size, height);
    } else {
       Panel_resize(item, COLS - this->x1 + this->x2 - lastX, height);
    }
-   Panel_move(item, lastX, this->y1);
+   Panel_move(item, lastX, this->y1 + (this->header ? this->header->height : 0));
    Vector_add(this->panels, item);
    item->needsRedraw = true;
    this->panelCount++;
@@ -71,30 +73,26 @@ Panel* ScreenManager_remove(ScreenManager* this, int idx) {
    return panel;
 }
 
-void ScreenManager_resize(ScreenManager* this, int x1, int y1, int x2, int y2) {
-   this->x1 = x1;
-   this->y1 = y1;
-   this->x2 = x2;
-   this->y2 = y2;
+void ScreenManager_resize(ScreenManager* this) {
+   int y1_header = this->y1 + (this->header ? this->header->height : 0);
    int panels = this->panelCount;
    int lastX = 0;
    for (int i = 0; i < panels - 1; i++) {
       Panel* panel = (Panel*) Vector_get(this->panels, i);
-      Panel_resize(panel, panel->w, LINES - y1 + y2);
-      Panel_move(panel, lastX, y1);
+      Panel_resize(panel, panel->w, LINES - y1_header + this->y2);
+      Panel_move(panel, lastX, y1_header);
       lastX = panel->x + panel->w + 1;
    }
    Panel* panel = (Panel*) Vector_get(this->panels, panels - 1);
-   Panel_resize(panel, COLS - x1 + x2 - lastX, LINES - y1 + y2);
-   Panel_move(panel, lastX, y1);
+   Panel_resize(panel, COLS - this->x1 + this->x2 - lastX, LINES - y1_header + this->y2);
+   Panel_move(panel, lastX, y1_header);
 }
 
 static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTimeout, bool* redraw, bool* rescan, bool* timedOut) {
    ProcessList* pl = this->header->pl;
 
-   struct timeval tv;
-   gettimeofday(&tv, NULL);
-   double newTime = ((double)tv.tv_sec * 10) + ((double)tv.tv_usec / 100000);
+   Platform_gettime_realtime(&pl->realtime, &pl->realtimeMs);
+   double newTime = ((double)pl->realtime.tv_sec * 10) + ((double)pl->realtime.tv_usec / 100000);
 
    *timedOut = (newTime - *oldTime > this->settings->delay);
    *rescan |= *timedOut;
@@ -105,7 +103,10 @@ static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTi
 
    if (*rescan) {
       *oldTime = newTime;
+      // scan processes first - some header values are calculated there
       ProcessList_scan(pl, this->state->pauseProcessUpdate);
+      // always update header, especially to avoid gaps in graph meters
+      Header_updateData(this->header);
       if (!this->state->pauseProcessUpdate && (*sortTimeout == 0 || this->settings->treeView)) {
          ProcessList_sort(pl);
          *sortTimeout = 1;
@@ -123,7 +124,11 @@ static void ScreenManager_drawPanels(ScreenManager* this, int focus, bool force_
    const int nPanels = this->panelCount;
    for (int i = 0; i < nPanels; i++) {
       Panel* panel = (Panel*) Vector_get(this->panels, i);
-      Panel_draw(panel, force_redraw, i == focus, !((panel == this->state->panel) && this->state->hideProcessSelection), State_hideFunctionBar(this->state));
+      Panel_draw(panel,
+                 force_redraw,
+                 i == focus,
+                 panel != (Panel*)this->state->mainPanel || !this->state->hideProcessSelection,
+                 State_hideFunctionBar(this->state));
       mvvline(panel->y, panel->x + panel->w, ' ', panel->h + (State_hideFunctionBar(this->state) ? 1 : 0));
    }
 }
@@ -157,10 +162,13 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
       }
 
       int prevCh = ch;
+#ifdef HAVE_SET_ESCDELAY
       set_escdelay(25);
+#endif
       ch = getch();
 
       HandlerResult result = IGNORED;
+#ifdef HAVE_GETMOUSE
       if (ch == KEY_MOUSE && this->settings->enableMouse) {
          ch = ERR;
          MEVENT mevent;
@@ -181,7 +189,7 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
                            if (panel == panelFocus || this->allowFocusChange) {
                               focus = i;
                               panelFocus = panel;
-                              Object* oldSelection = Panel_getSelected(panel);
+                              const Object* oldSelection = Panel_getSelected(panel);
                               Panel_setSelected(panel, mevent.y - panel->y + panel->scrollV - 1);
                               if (Panel_getSelected(panel) == oldSelection) {
                                  ch = KEY_RECLICK;
@@ -201,8 +209,10 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
             }
          }
       }
+#endif
       if (ch == ERR) {
-         sortTimeout--;
+         if (sortTimeout > 0)
+            sortTimeout--;
          if (prevCh == ch && !timedOut) {
             closeTimeout++;
             if (closeTimeout == 100) {
@@ -233,6 +243,10 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
       if (result & REDRAW) {
          force_redraw = true;
       }
+      if (result & RESIZE) {
+         ScreenManager_resize(this);
+         force_redraw = true;
+      }
       if (result & RESCAN) {
          rescan = true;
          sortTimeout = 0;
@@ -247,7 +261,7 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
       switch (ch) {
       case KEY_RESIZE:
       {
-         ScreenManager_resize(this, this->x1, this->y1, this->x2, this->y2);
+         ScreenManager_resize(this);
          continue;
       }
       case KEY_LEFT:

ScreenManager.h

@@ -26,7 +26,6 @@ typedef struct ScreenManager_ {
    Header* header;
    const Settings* settings;
    const State* state;
-   bool owner;
    bool allowFocusChange;
 } ScreenManager;
 
@@ -34,13 +33,13 @@ ScreenManager* ScreenManager_new(Header* header, const Settings* settings, const
 
 void ScreenManager_delete(ScreenManager* this);
 
-int ScreenManager_size(ScreenManager* this);
+int ScreenManager_size(const ScreenManager* this);
 
 void ScreenManager_add(ScreenManager* this, Panel* item, int size);
 
 Panel* ScreenManager_remove(ScreenManager* this, int idx);
 
-void ScreenManager_resize(ScreenManager* this, int x1, int y1, int x2, int y2);
+void ScreenManager_resize(ScreenManager* this);
 
 void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey);
 

Settings.c

@@ -7,12 +7,17 @@ in the source distribution for its full text.
 
 #include "Settings.h"
 
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 #include <sys/stat.h>
 
 #include "CRT.h"
+#include "DynamicColumn.h"
 #include "Macros.h"
 #include "Meter.h"
 #include "Platform.h"
@@ -22,21 +27,27 @@ in the source distribution for its full text.
 void Settings_delete(Settings* this) {
    free(this->filename);
    free(this->fields);
-   for (unsigned int i = 0; i < ARRAYSIZE(this->columns); i++) {
-      String_freeArray(this->columns[i].names);
-      free(this->columns[i].modes);
+   for (unsigned int i = 0; i < HeaderLayout_getColumns(this->hLayout); i++) {
+      if (this->hColumns[i].names) {
+         for (uint8_t j = 0; j < this->hColumns[i].len; j++)
+            free(this->hColumns[i].names[j]);
+         free(this->hColumns[i].names);
+      }
+      free(this->hColumns[i].modes);
    }
+   free(this->hColumns);
    free(this);
 }
 
-static void Settings_readMeters(Settings* this, char* line, int column) {
+static void Settings_readMeters(Settings* this, const char* line, unsigned int column) {
    char* trim = String_trim(line);
    char** ids = String_split(trim, ' ', NULL);
    free(trim);
-   this->columns[column].names = ids;
+   column = MINIMUM(column, HeaderLayout_getColumns(this->hLayout) - 1);
+   this->hColumns[column].names = ids;
 }
 
-static void Settings_readMeterModes(Settings* this, char* line, int column) {
+static void Settings_readMeterModes(Settings* this, const char* line, unsigned int column) {
    char* trim = String_trim(line);
    char** ids = String_split(trim, ' ', NULL);
    free(trim);
@@ -44,86 +55,120 @@ static void Settings_readMeterModes(Settings* this, char* line, int column) {
    for (int i = 0; ids[i]; i++) {
       len++;
    }
-   this->columns[column].len = len;
-   int* modes = xCalloc(len, sizeof(int));
+   column = MINIMUM(column, HeaderLayout_getColumns(this->hLayout) - 1);
+   this->hColumns[column].len = len;
+   int* modes = len ? xCalloc(len, sizeof(int)) : NULL;
    for (int i = 0; i < len; i++) {
       modes[i] = atoi(ids[i]);
    }
    String_freeArray(ids);
-   this->columns[column].modes = modes;
+   this->hColumns[column].modes = modes;
 }
 
-static void Settings_defaultMeters(Settings* this, int initialCpuCount) {
+static void Settings_defaultMeters(Settings* this, unsigned int initialCpuCount) {
    int sizes[] = { 3, 3 };
-   if (initialCpuCount > 4) {
+   if (initialCpuCount > 4 && initialCpuCount <= 128) {
       sizes[1]++;
    }
    for (int i = 0; i < 2; i++) {
-      this->columns[i].names = xCalloc(sizes[i] + 1, sizeof(char*));
-      this->columns[i].modes = xCalloc(sizes[i], sizeof(int));
-      this->columns[i].len = sizes[i];
+      this->hColumns[i].names = xCalloc(sizes[i] + 1, sizeof(char*));
+      this->hColumns[i].modes = xCalloc(sizes[i], sizeof(int));
+      this->hColumns[i].len = sizes[i];
    }
    int r = 0;
-   if (initialCpuCount > 8) {
-      this->columns[0].names[0] = xStrdup("LeftCPUs2");
-      this->columns[0].modes[0] = BAR_METERMODE;
-      this->columns[1].names[r] = xStrdup("RightCPUs2");
-      this->columns[1].modes[r++] = BAR_METERMODE;
+
+   if (initialCpuCount > 128) {
+      // Just show the average, ricers need to config for impressive screenshots
+      this->hColumns[0].names[0] = xStrdup("CPU");
+      this->hColumns[0].modes[0] = BAR_METERMODE;
+   } else if (initialCpuCount > 32) {
+      this->hColumns[0].names[0] = xStrdup("LeftCPUs8");
+      this->hColumns[0].modes[0] = BAR_METERMODE;
+      this->hColumns[1].names[r] = xStrdup("RightCPUs8");
+      this->hColumns[1].modes[r++] = BAR_METERMODE;
+   } else if (initialCpuCount > 16) {
+      this->hColumns[0].names[0] = xStrdup("LeftCPUs4");
+      this->hColumns[0].modes[0] = BAR_METERMODE;
+      this->hColumns[1].names[r] = xStrdup("RightCPUs4");
+      this->hColumns[1].modes[r++] = BAR_METERMODE;
+   } else if (initialCpuCount > 8) {
+      this->hColumns[0].names[0] = xStrdup("LeftCPUs2");
+      this->hColumns[0].modes[0] = BAR_METERMODE;
+      this->hColumns[1].names[r] = xStrdup("RightCPUs2");
+      this->hColumns[1].modes[r++] = BAR_METERMODE;
    } else if (initialCpuCount > 4) {
-      this->columns[0].names[0] = xStrdup("LeftCPUs");
-      this->columns[0].modes[0] = BAR_METERMODE;
-      this->columns[1].names[r] = xStrdup("RightCPUs");
-      this->columns[1].modes[r++] = BAR_METERMODE;
+      this->hColumns[0].names[0] = xStrdup("LeftCPUs");
+      this->hColumns[0].modes[0] = BAR_METERMODE;
+      this->hColumns[1].names[r] = xStrdup("RightCPUs");
+      this->hColumns[1].modes[r++] = BAR_METERMODE;
    } else {
-      this->columns[0].names[0] = xStrdup("AllCPUs");
-      this->columns[0].modes[0] = BAR_METERMODE;
+      this->hColumns[0].names[0] = xStrdup("AllCPUs");
+      this->hColumns[0].modes[0] = BAR_METERMODE;
    }
-   this->columns[0].names[1] = xStrdup("Memory");
-   this->columns[0].modes[1] = BAR_METERMODE;
-   this->columns[0].names[2] = xStrdup("Swap");
-   this->columns[0].modes[2] = BAR_METERMODE;
-   this->columns[1].names[r] = xStrdup("Tasks");
-   this->columns[1].modes[r++] = TEXT_METERMODE;
-   this->columns[1].names[r] = xStrdup("LoadAverage");
-   this->columns[1].modes[r++] = TEXT_METERMODE;
-   this->columns[1].names[r] = xStrdup("Uptime");
-   this->columns[1].modes[r++] = TEXT_METERMODE;
+   this->hColumns[0].names[1] = xStrdup("Memory");
+   this->hColumns[0].modes[1] = BAR_METERMODE;
+   this->hColumns[0].names[2] = xStrdup("Swap");
+   this->hColumns[0].modes[2] = BAR_METERMODE;
+   this->hColumns[1].names[r] = xStrdup("Tasks");
+   this->hColumns[1].modes[r++] = TEXT_METERMODE;
+   this->hColumns[1].names[r] = xStrdup("LoadAverage");
+   this->hColumns[1].modes[r++] = TEXT_METERMODE;
+   this->hColumns[1].names[r] = xStrdup("Uptime");
+   this->hColumns[1].modes[r++] = TEXT_METERMODE;
 }
 
-static void readFields(ProcessField* fields, uint32_t* flags, const char* line) {
+static void Settings_readFields(Settings* settings, const char* line) {
    char* trim = String_trim(line);
    char** ids = String_split(trim, ' ', NULL);
    free(trim);
-   int i, j;
-   *flags = 0;
-   for (j = 0, i = 0; i < LAST_PROCESSFIELD && ids[i]; i++) {
+
+   settings->flags = 0;
+
+   unsigned int i, j;
+   for (j = 0, i = 0; ids[i]; i++) {
+      if (j >= UINT_MAX / sizeof(ProcessField))
+         continue;
+      if (j >= LAST_PROCESSFIELD) {
+         settings->fields = xRealloc(settings->fields, j * sizeof(ProcessField));
+         memset(&settings->fields[j], 0, sizeof(ProcessField));
+      }
+
+      // Dynamically-defined columns are always stored by-name.
+      char* end, dynamic[32] = {0};
+      if (sscanf(ids[i], "Dynamic(%30s)", dynamic)) {
+         if ((end = strrchr(dynamic, ')')) == NULL)
+            continue;
+         *end = '\0';
+         unsigned int key;
+         if (!DynamicColumn_search(settings->dynamicColumns, dynamic, &key))
+            continue;
+         settings->fields[j++] = key;
+         continue;
+      }
       // This "+1" is for compatibility with the older enum format.
       int id = atoi(ids[i]) + 1;
       if (id > 0 && id < LAST_PROCESSFIELD && Process_fields[id].name) {
-         fields[j] = id;
-         *flags |= Process_fields[id].flags;
-         j++;
+         settings->flags |= Process_fields[id].flags;
+         settings->fields[j++] = id;
       }
    }
-   fields[j] = NULL_PROCESSFIELD;
+   settings->fields[j] = NULL_PROCESSFIELD;
    String_freeArray(ids);
 }
 
-static bool Settings_read(Settings* this, const char* fileName, int initialCpuCount) {
-   FILE* fd;
-   CRT_dropPrivileges();
-   fd = fopen(fileName, "r");
-   CRT_restorePrivileges();
+static bool Settings_read(Settings* this, const char* fileName, unsigned int initialCpuCount) {
+   FILE* fd = fopen(fileName, "r");
    if (!fd)
       return false;
 
    bool didReadMeters = false;
-   bool didReadFields = false;
+   bool didReadAny = false;
    for (;;) {
       char* line = String_readLine(fd);
       if (!line) {
          break;
       }
+      didReadAny = true;
       size_t nOptions;
       char** option = String_split(line, '=', &nOptions);
       free (line);
@@ -131,9 +176,16 @@ static bool Settings_read(Settings* this, const char* fileName, int initialCpuCo
          String_freeArray(option);
          continue;
       }
-      if (String_eq(option[0], "fields")) {
-         readFields(this->fields, &(this->flags), option[1]);
-         didReadFields = true;
+      if (String_eq(option[0], "config_reader_min_version")) {
+         this->config_version = atoi(option[1]);
+         if (this->config_version > CONFIG_READER_MIN_VERSION) {
+            // the version of the config file on disk is newer than what we can read
+            fprintf(stderr, "WARNING: %s specifies configuration format version v%d, but this %s binary supports up to v%d.", fileName, this->config_version, PACKAGE, CONFIG_READER_MIN_VERSION);
+            fprintf(stderr, "         The configuration version will be downgraded to v%d when %s exits.\n", CONFIG_READER_MIN_VERSION, PACKAGE);
+            return false;
+         }
+      } else if (String_eq(option[0], "fields")) {
+         Settings_readFields(this, option[1]);
       } else if (String_eq(option[0], "sort_key")) {
          // This "+1" is for compatibility with the older enum format.
          this->sortKey = atoi(option[1]) + 1;
@@ -148,6 +200,8 @@ static bool Settings_read(Settings* this, const char* fileName, int initialCpuCo
          this->treeView = atoi(option[1]);
       } else if (String_eq(option[0], "tree_view_always_by_pid")) {
          this->treeViewAlwaysByPID = atoi(option[1]);
+      } else if (String_eq(option[0], "all_branches_collapsed")) {
+         this->allBranchesCollapsed = atoi(option[1]);
       } else if (String_eq(option[0], "hide_kernel_threads")) {
          this->hideKernelThreads = atoi(option[1]);
       } else if (String_eq(option[0], "hide_userland_threads")) {
@@ -160,6 +214,8 @@ static bool Settings_read(Settings* this, const char* fileName, int initialCpuCo
          this->showProgramPath = atoi(option[1]);
       } else if (String_eq(option[0], "highlight_base_name")) {
          this->highlightBaseName = atoi(option[1]);
+      } else if (String_eq(option[0], "highlight_deleted_exe")) {
+         this->highlightDeletedExe = atoi(option[1]);
       } else if (String_eq(option[0], "highlight_megabytes")) {
          this->highlightMegabytes = atoi(option[1]);
       } else if (String_eq(option[0], "highlight_threads")) {
@@ -167,7 +223,7 @@ static bool Settings_read(Settings* this, const char* fileName, int initialCpuCo
       } else if (String_eq(option[0], "highlight_changes")) {
          this->highlightChanges = atoi(option[1]);
       } else if (String_eq(option[0], "highlight_changes_delay_secs")) {
-         this->highlightDelaySecs = CLAMP(atoi(option[1]), 1, 24*60*60);
+         this->highlightDelaySecs = CLAMP(atoi(option[1]), 1, 24 * 60 * 60);
       } else if (String_eq(option[0], "find_comm_in_cmdline")) {
          this->findCommInCmdline = atoi(option[1]);
       } else if (String_eq(option[0], "strip_exe_from_cmdline")) {
@@ -190,7 +246,7 @@ static bool Settings_read(Settings* this, const char* fileName, int initialCpuCo
          this->showCPUUsage = atoi(option[1]);
       } else if (String_eq(option[0], "show_cpu_frequency")) {
          this->showCPUFrequency = atoi(option[1]);
-      #ifdef HAVE_SENSORS_SENSORS_H
+      #ifdef BUILD_WITH_CPU_TEMP
       } else if (String_eq(option[0], "show_cpu_temperature")) {
          this->showCPUTemperature = atoi(option[1]);
       } else if (String_eq(option[0], "degree_fahrenheit")) {
@@ -207,8 +263,16 @@ static bool Settings_read(Settings* this, const char* fileName, int initialCpuCo
          if (this->colorScheme < 0 || this->colorScheme >= LAST_COLORSCHEME) {
             this->colorScheme = 0;
          }
+      #ifdef HAVE_GETMOUSE
       } else if (String_eq(option[0], "enable_mouse")) {
          this->enableMouse = atoi(option[1]);
+      #endif
+      } else if (String_eq(option[0], "header_layout")) {
+         this->hLayout = isdigit((unsigned char)option[1][0]) ? ((HeaderLayout) atoi(option[1])) : HeaderLayout_fromName(option[1]);
+         if (this->hLayout < 0 || this->hLayout >= LAST_HEADER_LAYOUT)
+            this->hLayout = HF_TWO_50_50;
+         free(this->hColumns);
+         this->hColumns = xCalloc(HeaderLayout_getColumns(this->hLayout), sizeof(MeterColumnSetting));
       } else if (String_eq(option[0], "left_meters")) {
          Settings_readMeters(this, option[1], 0);
          didReadMeters = true;
@@ -221,6 +285,12 @@ static bool Settings_read(Settings* this, const char* fileName, int initialCpuCo
       } else if (String_eq(option[0], "right_meter_modes")) {
          Settings_readMeterModes(this, option[1], 1);
          didReadMeters = true;
+      } else if (String_startsWith(option[0], "column_meters_")) {
+         Settings_readMeters(this, option[1], atoi(option[0] + strlen("column_meters_")));
+         didReadMeters = true;
+      } else if (String_startsWith(option[0], "column_meter_modes_")) {
+         Settings_readMeterModes(this, option[1], atoi(option[0] + strlen("column_meter_modes_")));
+         didReadMeters = true;
       } else if (String_eq(option[0], "hide_function_bar")) {
          this->hideFunctionBar = atoi(option[1]);
       #ifdef HAVE_LIBHWLOC
@@ -234,116 +304,160 @@ static bool Settings_read(Settings* this, const char* fileName, int initialCpuCo
    if (!didReadMeters) {
       Settings_defaultMeters(this, initialCpuCount);
    }
-   return didReadFields;
+   return didReadAny;
 }
 
-static void writeFields(FILE* fd, ProcessField* fields, const char* name) {
+static void writeFields(FILE* fd, const ProcessField* fields, Hashtable* columns, const char* name, char separator) {
    fprintf(fd, "%s=", name);
    const char* sep = "";
-   for (int i = 0; fields[i]; i++) {
-      // This "-1" is for compatibility with the older enum format.
-      fprintf(fd, "%s%d", sep, (int) fields[i] - 1);
+   for (unsigned int i = 0; fields[i]; i++) {
+      if (fields[i] >= LAST_PROCESSFIELD) {
+         const DynamicColumn* column = DynamicColumn_lookup(columns, fields[i]);
+         fprintf(fd, "%sDynamic(%s)", sep, column->name);
+      } else {
+         // This "-1" is for compatibility with the older enum format.
+         fprintf(fd, "%s%d", sep, (int) fields[i] - 1);
+      }
       sep = " ";
    }
-   fprintf(fd, "\n");
+   fputc(separator, fd);
 }
 
-static void writeMeters(Settings* this, FILE* fd, int column) {
+static void writeMeters(const Settings* this, FILE* fd, char separator, unsigned int column) {
    const char* sep = "";
-   for (int i = 0; i < this->columns[column].len; i++) {
-      fprintf(fd, "%s%s", sep, this->columns[column].names[i]);
+   for (uint8_t i = 0; i < this->hColumns[column].len; i++) {
+      fprintf(fd, "%s%s", sep, this->hColumns[column].names[i]);
       sep = " ";
    }
-   fprintf(fd, "\n");
+   fputc(separator, fd);
 }
 
-static void writeMeterModes(Settings* this, FILE* fd, int column) {
+static void writeMeterModes(const Settings* this, FILE* fd, char separator, unsigned int column) {
    const char* sep = "";
-   for (int i = 0; i < this->columns[column].len; i++) {
-      fprintf(fd, "%s%d", sep, this->columns[column].modes[i]);
+   for (uint8_t i = 0; i < this->hColumns[column].len; i++) {
+      fprintf(fd, "%s%d", sep, this->hColumns[column].modes[i]);
       sep = " ";
    }
-   fprintf(fd, "\n");
+   fputc(separator, fd);
 }
 
-bool Settings_write(Settings* this) {
+int Settings_write(const Settings* this, bool onCrash) {
    FILE* fd;
-
-   CRT_dropPrivileges();
-   fd = fopen(this->filename, "w");
-   CRT_restorePrivileges();
-
-   if (fd == NULL) {
-      return false;
+   char separator;
+   if (onCrash) {
+      fd = stderr;
+      separator = ';';
+   } else {
+      fd = fopen(this->filename, "w");
+      if (fd == NULL)
+         return -errno;
+      separator = '\n';
    }
-   fprintf(fd, "# Beware! This file is rewritten by htop when settings are changed in the interface.\n");
-   fprintf(fd, "# The parser is also very primitive, and not human-friendly.\n");
-   writeFields(fd, this->fields, "fields");
+
+   #define printSettingInteger(setting_, value_) \
+      fprintf(fd, setting_ "=%d%c", (int) value_, separator);
+   #define printSettingString(setting_, value_) \
+      fprintf(fd, setting_ "=%s%c", value_, separator);
+
+   if (!onCrash) {
+      fprintf(fd, "# Beware! This file is rewritten by htop when settings are changed in the interface.\n");
+      fprintf(fd, "# The parser is also very primitive, and not human-friendly.\n");
+   }
+   printSettingString("htop_version", VERSION);
+   printSettingInteger("config_reader_min_version", CONFIG_READER_MIN_VERSION);
+   writeFields(fd, this->fields, this->dynamicColumns, "fields", separator);
    // This "-1" is for compatibility with the older enum format.
-   fprintf(fd, "sort_key=%d\n", (int) this->sortKey - 1);
-   fprintf(fd, "sort_direction=%d\n", (int) this->direction);
-   fprintf(fd, "tree_sort_key=%d\n", (int) this->treeSortKey - 1);
-   fprintf(fd, "tree_sort_direction=%d\n", (int) this->treeDirection);
-   fprintf(fd, "hide_kernel_threads=%d\n", (int) this->hideKernelThreads);
-   fprintf(fd, "hide_userland_threads=%d\n", (int) this->hideUserlandThreads);
-   fprintf(fd, "shadow_other_users=%d\n", (int) this->shadowOtherUsers);
-   fprintf(fd, "show_thread_names=%d\n", (int) this->showThreadNames);
-   fprintf(fd, "show_program_path=%d\n", (int) this->showProgramPath);
-   fprintf(fd, "highlight_base_name=%d\n", (int) this->highlightBaseName);
-   fprintf(fd, "highlight_megabytes=%d\n", (int) this->highlightMegabytes);
-   fprintf(fd, "highlight_threads=%d\n", (int) this->highlightThreads);
-   fprintf(fd, "highlight_changes=%d\n", (int) this->highlightChanges);
-   fprintf(fd, "highlight_changes_delay_secs=%d\n", (int) this->highlightDelaySecs);
-   fprintf(fd, "find_comm_in_cmdline=%d\n", (int) this->findCommInCmdline);
-   fprintf(fd, "strip_exe_from_cmdline=%d\n", (int) this->stripExeFromCmdline);
-   fprintf(fd, "show_merged_command=%d\n", (int) this->showMergedCommand);
-   fprintf(fd, "tree_view=%d\n", (int) this->treeView);
-   fprintf(fd, "tree_view_always_by_pid=%d\n", (int) this->treeViewAlwaysByPID);
-   fprintf(fd, "header_margin=%d\n", (int) this->headerMargin);
-   fprintf(fd, "detailed_cpu_time=%d\n", (int) this->detailedCPUTime);
-   fprintf(fd, "cpu_count_from_one=%d\n", (int) this->countCPUsFromOne);
-   fprintf(fd, "show_cpu_usage=%d\n", (int) this->showCPUUsage);
-   fprintf(fd, "show_cpu_frequency=%d\n", (int) this->showCPUFrequency);
-   #ifdef HAVE_SENSORS_SENSORS_H
-   fprintf(fd, "show_cpu_temperature=%d\n", (int) this->showCPUTemperature);
-   fprintf(fd, "degree_fahrenheit=%d\n", (int) this->degreeFahrenheit);
+   printSettingInteger("sort_key", this->sortKey - 1);
+   printSettingInteger("sort_direction", this->direction);
+   printSettingInteger("tree_sort_key", this->treeSortKey - 1);
+   printSettingInteger("tree_sort_direction", this->treeDirection);
+   printSettingInteger("hide_kernel_threads", this->hideKernelThreads);
+   printSettingInteger("hide_userland_threads", this->hideUserlandThreads);
+   printSettingInteger("shadow_other_users", this->shadowOtherUsers);
+   printSettingInteger("show_thread_names", this->showThreadNames);
+   printSettingInteger("show_program_path", this->showProgramPath);
+   printSettingInteger("highlight_base_name", this->highlightBaseName);
+   printSettingInteger("highlight_deleted_exe", this->highlightDeletedExe);
+   printSettingInteger("highlight_megabytes", this->highlightMegabytes);
+   printSettingInteger("highlight_threads", this->highlightThreads);
+   printSettingInteger("highlight_changes", this->highlightChanges);
+   printSettingInteger("highlight_changes_delay_secs", this->highlightDelaySecs);
+   printSettingInteger("find_comm_in_cmdline", this->findCommInCmdline);
+   printSettingInteger("strip_exe_from_cmdline", this->stripExeFromCmdline);
+   printSettingInteger("show_merged_command", this->showMergedCommand);
+   printSettingInteger("tree_view", this->treeView);
+   printSettingInteger("tree_view_always_by_pid", this->treeViewAlwaysByPID);
+   printSettingInteger("all_branches_collapsed", this->allBranchesCollapsed);
+   printSettingInteger("header_margin", this->headerMargin);
+   printSettingInteger("detailed_cpu_time", this->detailedCPUTime);
+   printSettingInteger("cpu_count_from_one", this->countCPUsFromOne);
+   printSettingInteger("show_cpu_usage", this->showCPUUsage);
+   printSettingInteger("show_cpu_frequency", this->showCPUFrequency);
+   #ifdef BUILD_WITH_CPU_TEMP
+   printSettingInteger("show_cpu_temperature", this->showCPUTemperature);
+   printSettingInteger("degree_fahrenheit", this->degreeFahrenheit);
    #endif
-   fprintf(fd, "update_process_names=%d\n", (int) this->updateProcessNames);
-   fprintf(fd, "account_guest_in_cpu_meter=%d\n", (int) this->accountGuestInCPUMeter);
-   fprintf(fd, "color_scheme=%d\n", (int) this->colorScheme);
-   fprintf(fd, "enable_mouse=%d\n", (int) this->enableMouse);
-   fprintf(fd, "delay=%d\n", (int) this->delay);
-   fprintf(fd, "left_meters="); writeMeters(this, fd, 0);
-   fprintf(fd, "left_meter_modes="); writeMeterModes(this, fd, 0);
-   fprintf(fd, "right_meters="); writeMeters(this, fd, 1);
-   fprintf(fd, "right_meter_modes="); writeMeterModes(this, fd, 1);
-   fprintf(fd, "hide_function_bar=%d\n", (int) this->hideFunctionBar);
+   printSettingInteger("update_process_names", this->updateProcessNames);
+   printSettingInteger("account_guest_in_cpu_meter", this->accountGuestInCPUMeter);
+   printSettingInteger("color_scheme", this->colorScheme);
+   #ifdef HAVE_GETMOUSE
+   printSettingInteger("enable_mouse", this->enableMouse);
+   #endif
+   printSettingInteger("delay", (int) this->delay);
+   printSettingInteger("hide_function_bar", (int) this->hideFunctionBar);
    #ifdef HAVE_LIBHWLOC
-   fprintf(fd, "topology_affinity=%d\n", (int) this->topologyAffinity);
+   printSettingInteger("topology_affinity", this->topologyAffinity);
    #endif
-   fclose(fd);
-   return true;
+
+   printSettingString("header_layout", HeaderLayout_getName(this->hLayout));
+   for (unsigned int i = 0; i < HeaderLayout_getColumns(this->hLayout); i++) {
+      fprintf(fd, "column_meters_%u=", i);
+      writeMeters(this, fd, separator, i);
+      fprintf(fd, "column_meter_modes_%u=", i);
+      writeMeterModes(this, fd, separator, i);
+   }
+
+   #undef printSettingString
+   #undef printSettingInteger
+
+   if (onCrash)
+      return 0;
+
+   int r = 0;
+
+   if (ferror(fd) != 0)
+      r = (errno != 0) ? -errno : -EBADF;
+
+   if (fclose(fd) != 0)
+      r = r ? r : -errno;
+
+   return r;
 }
 
-Settings* Settings_new(int initialCpuCount) {
+Settings* Settings_new(unsigned int initialCpuCount, Hashtable* dynamicColumns) {
    Settings* this = xCalloc(1, sizeof(Settings));
 
+   this->dynamicColumns = dynamicColumns;
+   this->hLayout = HF_TWO_50_50;
+   this->hColumns = xCalloc(HeaderLayout_getColumns(this->hLayout), sizeof(MeterColumnSetting));
    this->sortKey = PERCENT_CPU;
    this->treeSortKey = PID;
-   this->direction = 1;
+   this->direction = -1;
    this->treeDirection = 1;
    this->shadowOtherUsers = false;
    this->showThreadNames = false;
-   this->hideKernelThreads = false;
+   this->hideKernelThreads = true;
    this->hideUserlandThreads = false;
    this->treeView = false;
+   this->allBranchesCollapsed = false;
    this->highlightBaseName = false;
-   this->highlightMegabytes = false;
+   this->highlightDeletedExe = true;
+   this->highlightMegabytes = true;
    this->detailedCPUTime = false;
    this->countCPUsFromOne = false;
    this->showCPUUsage = true;
    this->showCPUFrequency = false;
-   #ifdef HAVE_SENSORS_SENSORS_H
+   #ifdef BUILD_WITH_CPU_TEMP
    this->showCPUTemperature = false;
    this->degreeFahrenheit = false;
    #endif
@@ -356,6 +470,7 @@ Settings* Settings_new(int initialCpuCount) {
    this->stripExeFromCmdline = true;
    this->showMergedCommand = false;
    this->hideFunctionBar = 0;
+   this->headerMargin = true;
    #ifdef HAVE_LIBHWLOC
    this->topologyAffinity = false;
    #endif
@@ -370,7 +485,7 @@ Settings* Settings_new(int initialCpuCount) {
    }
 
    char* legacyDotfile = NULL;
-   char* rcfile = getenv("HTOPRC");
+   const char* rcfile = getenv("HTOPRC");
    if (rcfile) {
       this->filename = xStrdup(rcfile);
    } else {
@@ -391,7 +506,6 @@ Settings* Settings_new(int initialCpuCount) {
          htopDir = String_cat(home, "/.config/htop");
       }
       legacyDotfile = String_cat(home, "/.htoprc");
-      CRT_dropPrivileges();
       (void) mkdir(configDir, 0700);
       (void) mkdir(htopDir, 0700);
       free(htopDir);
@@ -402,10 +516,11 @@ Settings* Settings_new(int initialCpuCount) {
          free(legacyDotfile);
          legacyDotfile = NULL;
       }
-      CRT_restorePrivileges();
    }
    this->colorScheme = 0;
+#ifdef HAVE_GETMOUSE
    this->enableMouse = true;
+#endif
    this->changed = false;
    this->delay = DEFAULT_DELAY;
    bool ok = false;
@@ -413,7 +528,7 @@ Settings* Settings_new(int initialCpuCount) {
       ok = Settings_read(this, legacyDotfile, initialCpuCount);
       if (ok) {
          // Transition to new location and delete old configuration file
-         if (Settings_write(this)) {
+         if (Settings_write(this, false) == 0) {
             unlink(legacyDotfile);
          }
       }
@@ -424,20 +539,7 @@ Settings* Settings_new(int initialCpuCount) {
    }
    if (!ok) {
       this->changed = true;
-      // TODO: how to get SYSCONFDIR correctly through Autoconf?
-      char* systemSettings = String_cat(SYSCONFDIR, "/htoprc");
-      ok = Settings_read(this, systemSettings, initialCpuCount);
-      free(systemSettings);
-   }
-   if (!ok) {
-      Settings_defaultMeters(this, initialCpuCount);
-      this->hideKernelThreads = true;
-      this->highlightMegabytes = true;
-      this->highlightThreads = true;
-      this->findCommInCmdline = true;
-      this->stripExeFromCmdline = true;
-      this->showMergedCommand = false;
-      this->headerMargin = true;
+      Settings_read(this, SYSCONFDIR "/htoprc", initialCpuCount);
    }
    return this;
 }
@@ -450,10 +552,43 @@ void Settings_invertSortOrder(Settings* this) {
 void Settings_setSortKey(Settings* this, ProcessField sortKey) {
    if (this->treeViewAlwaysByPID || !this->treeView) {
       this->sortKey = sortKey;
-      this->direction = 1;
+      this->direction = (Process_fields[sortKey].defaultSortDesc) ? -1 : 1;
       this->treeView = false;
    } else {
       this->treeSortKey = sortKey;
-      this->treeDirection = 1;
+      this->treeDirection = (Process_fields[sortKey].defaultSortDesc) ? -1 : 1;
    }
 }
+
+static bool readonly = false;
+
+void Settings_enableReadonly(void) {
+   readonly = true;
+}
+
+bool Settings_isReadonly(void) {
+   return readonly;
+}
+
+void Settings_setHeaderLayout(Settings* this, HeaderLayout hLayout) {
+   unsigned int oldColumns = HeaderLayout_getColumns(this->hLayout);
+   unsigned int newColumns = HeaderLayout_getColumns(hLayout);
+
+   if (newColumns > oldColumns) {
+      this->hColumns = xReallocArray(this->hColumns, newColumns, sizeof(MeterColumnSetting));
+      memset(this->hColumns + oldColumns, 0, (newColumns - oldColumns) * sizeof(MeterColumnSetting));
+   } else if (newColumns < oldColumns) {
+      for (unsigned int i = newColumns; i < oldColumns; i++) {
+         if (this->hColumns[i].names) {
+            for (uint8_t j = 0; j < this->hColumns[i].len; j++)
+               free(this->hColumns[i].names[j]);
+            free(this->hColumns[i].names);
+         }
+         free(this->hColumns[i].modes);
+      }
+      this->hColumns = xReallocArray(this->hColumns, newColumns, sizeof(MeterColumnSetting));
+   }
+
+   this->hLayout = hLayout;
+   this->changed = true;
+}

Settings.h

@@ -12,20 +12,27 @@ in the source distribution for its full text.
 #include <stdbool.h>
 #include <stdint.h>
 
+#include "Hashtable.h"
+#include "HeaderLayout.h"
 #include "Process.h"
 
 
 #define DEFAULT_DELAY 15
 
+#define CONFIG_READER_MIN_VERSION 2
+
 typedef struct {
-   int len;
+   uint8_t len;
    char** names;
    int* modes;
-} MeterColumnSettings;
+} MeterColumnSetting;
 
 typedef struct Settings_ {
    char* filename;
-   MeterColumnSettings columns[2];
+   int config_version;
+   HeaderLayout hLayout;
+   MeterColumnSetting* hColumns;
+   Hashtable* dynamicColumns;
 
    ProcessField* fields;
    uint32_t flags;
@@ -41,18 +48,20 @@ typedef struct Settings_ {
    bool detailedCPUTime;
    bool showCPUUsage;
    bool showCPUFrequency;
-   #ifdef HAVE_SENSORS_SENSORS_H
+   #ifdef BUILD_WITH_CPU_TEMP
    bool showCPUTemperature;
    bool degreeFahrenheit;
    #endif
    bool treeView;
    bool treeViewAlwaysByPID;
+   bool allBranchesCollapsed;
    bool showProgramPath;
    bool shadowOtherUsers;
    bool showThreadNames;
    bool hideKernelThreads;
    bool hideUserlandThreads;
    bool highlightBaseName;
+   bool highlightDeletedExe;
    bool highlightMegabytes;
    bool highlightThreads;
    bool highlightChanges;
@@ -63,7 +72,9 @@ typedef struct Settings_ {
    bool updateProcessNames;
    bool accountGuestInCPUMeter;
    bool headerMargin;
+   #ifdef HAVE_GETMOUSE
    bool enableMouse;
+   #endif
    int hideFunctionBar;  // 0 - off, 1 - on ESC until next input, 2 - permanently
    #ifdef HAVE_LIBHWLOC
    bool topologyAffinity;
@@ -86,12 +97,18 @@ static inline int Settings_getActiveDirection(const Settings* this) {
 
 void Settings_delete(Settings* this);
 
-bool Settings_write(Settings* this);
+int Settings_write(const Settings* this, bool onCrash);
 
-Settings* Settings_new(int initialCpuCount);
+Settings* Settings_new(unsigned int initialCpuCount, Hashtable* dynamicColumns);
 
 void Settings_invertSortOrder(Settings* this);
 
 void Settings_setSortKey(Settings* this, ProcessField sortKey);
 
+void Settings_enableReadonly(void);
+
+bool Settings_isReadonly(void);
+
+void Settings_setHeaderLayout(Settings* this, HeaderLayout hLayout);
+
 #endif

SignalsPanel.h

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include "Panel.h"
 
+
 typedef struct SignalItem_ {
    const char* name;
    int number;

SwapMeter.c

@@ -5,8 +5,13 @@ Released under the GNU GPLv2, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "config.h" // IWYU pragma: keep
+
 #include "SwapMeter.h"
 
+#include <math.h>
+#include <stddef.h>
+
 #include "CRT.h"
 #include "Object.h"
 #include "Platform.h"
@@ -14,11 +19,16 @@ in the source distribution for its full text.
 
 
 static const int SwapMeter_attributes[] = {
-   SWAP
+   SWAP,
+   SWAP_CACHE
 };
 
-static void SwapMeter_updateValues(Meter* this, char* buffer, size_t size) {
+static void SwapMeter_updateValues(Meter* this) {
+   char* buffer = this->txtBuffer;
+   size_t size = sizeof(this->txtBuffer);
    int written;
+
+   this->values[1] = NAN;   /* 'cached' not present on all platforms */
    Platform_setSwapValues(this);
 
    written = Meter_humanUnit(buffer, this->values[0], size);
@@ -38,6 +48,12 @@ static void SwapMeter_display(const Object* cast, RichString* out) {
    Meter_humanUnit(buffer, this->values[0], sizeof(buffer));
    RichString_appendAscii(out, CRT_colors[METER_TEXT], " used:");
    RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
+
+   if (!isnan(this->values[1])) {
+      Meter_humanUnit(buffer, this->values[1], sizeof(buffer));
+      RichString_appendAscii(out, CRT_colors[METER_TEXT], " cache:");
+      RichString_appendAscii(out, CRT_colors[SWAP_CACHE], buffer);
+   }
 }
 
 const MeterClass SwapMeter_class = {
@@ -48,7 +64,7 @@ const MeterClass SwapMeter_class = {
    },
    .updateValues = SwapMeter_updateValues,
    .defaultMode = BAR_METERMODE,
-   .maxItems = 1,
+   .maxItems = 2,
    .total = 100.0,
    .attributes = SwapMeter_attributes,
    .name = "Swap",

SwapMeter.h

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include "Meter.h"
 
+
 extern const MeterClass SwapMeter_class;
 
 #endif

SysArchMeter.c

@@ -0,0 +1,44 @@
+/*
+htop - SysArchMeter.c
+(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 "SysArchMeter.h"
+
+#include <stddef.h>
+
+#include "CRT.h"
+#include "Object.h"
+#include "Platform.h"
+#include "XUtils.h"
+
+
+static const int SysArchMeter_attributes[] = {HOSTNAME};
+
+static void SysArchMeter_updateValues(Meter* this) {
+   static char* string;
+
+   if (string == NULL)
+      Platform_getRelease(&string);
+
+   String_safeStrncpy(this->txtBuffer, string, sizeof(this->txtBuffer));
+}
+
+const MeterClass SysArchMeter_class = {
+   .super = {
+      .extends = Class(Meter),
+      .delete = Meter_delete
+   },
+   .updateValues = SysArchMeter_updateValues,
+   .defaultMode = TEXT_METERMODE,
+   .maxItems = 0,
+   .total = 100.0,
+   .attributes = SysArchMeter_attributes,
+   .name = "System",
+   .uiName = "System",
+   .caption = "System: ",
+};