add rpi model 3b+ to tested list

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

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

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

Proof of Concept (on Linux):

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

.github/workflows/ci.yml

@@ -113,6 +113,10 @@ jobs:
   build-ubuntu-latest-pcp:
     # Turns out 'ubuntu-latest' can be older than 20.04, we want PCP v5+
     runs-on: ubuntu-20.04
+    env:
+      # Until Ubuntu catches up with pcp-5.2.3+:
+      #   pcp/Platform.c:309:45: warning: passing argument 2 of ‘pmLookupName’ from incompatible pointer type [-Wincompatible-pointer-types]
+      CFLAGS: -Wno-error=incompatible-pointer-types
     steps:
     - uses: actions/checkout@v2
     - name: Install Dependencies
@@ -120,9 +124,7 @@ jobs:
     - name: Bootstrap
       run: ./autogen.sh
     - name: Configure
-      # 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
+      run: ./configure --enable-werror --enable-pcp --enable-unicode
     - name: Build
       run: make -k
 

Action.c

@@ -58,7 +58,7 @@ Object* Action_pickFromVector(State* st, Panel* list, int x, bool followProcess)
       header->pl->following = pid;
       unfollow = true;
    }
-   ScreenManager_run(scr, &panelFocus, &ch);
+   ScreenManager_run(scr, &panelFocus, &ch, NULL);
    if (unfollow) {
       header->pl->following = -1;
    }
@@ -85,9 +85,10 @@ 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_new(scr, st->settings, st->header, st->pl);
-   ScreenManager_run(scr, NULL, NULL);
+   ScreenManager_run(scr, NULL, NULL, "Setup");
    ScreenManager_delete(scr);
    if (st->settings->changed) {
+      CRT_setMouse(st->settings->enableMouse);
       Header_writeBackToSettings(st->header);
    }
 }
@@ -154,7 +155,7 @@ static bool collapseIntoParent(Panel* panel) {
 }
 
 Htop_Reaction Action_setSortKey(Settings* settings, ProcessField sortKey) {
-   Settings_setSortKey(settings, sortKey);
+   ScreenSettings_setSortKey(settings->ss, sortKey);
    return HTOP_REFRESH | HTOP_SAVE_SETTINGS | HTOP_UPDATE_PANELHDR | HTOP_KEEP_FOLLOWING;
 }
 
@@ -164,8 +165,9 @@ 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");
-   const ProcessField* fields = st->settings->fields;
-   Hashtable* dynamicColumns = st->settings->dynamicColumns;
+   const Settings* settings = st->settings;
+   const ProcessField* fields = settings->ss->fields;
+   Hashtable* dynamicColumns = settings->dynamicColumns;
    for (int i = 0; fields[i]; i++) {
       char* name = NULL;
       if (fields[i] >= LAST_PROCESSFIELD) {
@@ -177,7 +179,7 @@ static Htop_Reaction actionSetSortColumn(State* st) {
          name = String_trim(Process_fields[fields[i]].name);
       }
       Panel_add(sortPanel, (Object*) ListItem_new(name, fields[i]));
-      if (fields[i] == Settings_getActiveSortKey(st->settings))
+      if (fields[i] == ScreenSettings_getActiveSortKey(settings->ss))
          Panel_setSelected(sortPanel, i);
 
       free(name);
@@ -188,8 +190,7 @@ static Htop_Reaction actionSetSortColumn(State* st) {
    }
    Object_delete(sortPanel);
 
-   if (st->pauseProcessUpdate)
-      ProcessList_sort(st->pl);
+   st->pl->needsSort = true;
 
    return reaction | HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
 }
@@ -231,16 +232,21 @@ static Htop_Reaction actionToggleMergedCommand(State* st) {
 }
 
 static Htop_Reaction actionToggleTreeView(State* st) {
-   st->settings->treeView = !st->settings->treeView;
+   ScreenSettings* ss = st->settings->ss;
+   ss->treeView = !ss->treeView;
 
-   if (!st->settings->allBranchesCollapsed)
+   if (!ss->allBranchesCollapsed)
       ProcessList_expandTree(st->pl);
    return HTOP_REFRESH | HTOP_SAVE_SETTINGS | HTOP_KEEP_FOLLOWING | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
 }
 
 static Htop_Reaction actionExpandOrCollapseAllBranches(State* st) {
-   st->settings->allBranchesCollapsed = !st->settings->allBranchesCollapsed;
-   if (st->settings->allBranchesCollapsed)
+   ScreenSettings* ss = st->settings->ss;
+   if (!ss->treeView) {
+      return HTOP_OK;
+   }
+   ss->allBranchesCollapsed = !ss->allBranchesCollapsed;
+   if (ss->allBranchesCollapsed)
       ProcessList_collapseAllBranches(st->pl);
    else
       ProcessList_expandTree(st->pl);
@@ -277,9 +283,8 @@ static Htop_Reaction actionLowerPriority(State* st) {
 }
 
 static Htop_Reaction actionInvertSortOrder(State* st) {
-   Settings_invertSortOrder(st->settings);
-   if (st->pauseProcessUpdate)
-      ProcessList_sort(st->pl);
+   ScreenSettings_invertSortOrder(st->settings->ss);
+   st->pl->needsSort = true;
    return HTOP_REFRESH | HTOP_SAVE_SETTINGS | HTOP_KEEP_FOLLOWING;
 }
 
@@ -289,7 +294,7 @@ static Htop_Reaction actionExpandOrCollapse(State* st) {
 }
 
 static Htop_Reaction actionCollapseIntoParent(State* st) {
-   if (!st->settings->treeView) {
+   if (!st->settings->ss->treeView) {
       return HTOP_OK;
    }
    bool changed = collapseIntoParent((Panel*)st->mainPanel);
@@ -297,7 +302,46 @@ static Htop_Reaction actionCollapseIntoParent(State* st) {
 }
 
 static Htop_Reaction actionExpandCollapseOrSortColumn(State* st) {
-   return st->settings->treeView ? actionExpandOrCollapse(st) : actionSetSortColumn(st);
+   return st->settings->ss->treeView ? actionExpandOrCollapse(st) : actionSetSortColumn(st);
+}
+
+static Htop_Reaction actionNextScreen(State* st) {
+   Settings* settings = st->settings;
+   settings->ssIndex++;
+   if (settings->ssIndex == settings->nScreens) {
+      settings->ssIndex = 0;
+   }
+   settings->ss = settings->screens[settings->ssIndex];
+   return HTOP_REFRESH;
+}
+
+static Htop_Reaction actionPrevScreen(State* st) {
+   Settings* settings = st->settings;
+   if (settings->ssIndex == 0) {
+      settings->ssIndex = settings->nScreens - 1;
+   } else {
+      settings->ssIndex--;
+   }
+   settings->ss = settings->screens[settings->ssIndex];
+   return HTOP_REFRESH;
+}
+
+Htop_Reaction Action_setScreenTab(Settings* settings, int x) {
+   int s = 2;
+   for (unsigned int i = 0; i < settings->nScreens; i++) {
+      if (x < s) {
+         return 0;
+      }
+      const char* name = settings->screens[i]->name;
+      int len = strlen(name);
+      if (x <= s + len + 1) {
+         settings->ssIndex = i;
+         settings->ss = settings->screens[i];
+         return HTOP_REFRESH;
+      }
+      s += len + 3;
+   }
+   return 0;
 }
 
 static Htop_Reaction actionQuit(ATTR_UNUSED State* st) {
@@ -344,9 +388,12 @@ static Htop_Reaction actionKill(State* st) {
    if (Settings_isReadonly())
       return HTOP_OK;
 
-   Panel* signalsPanel = SignalsPanel_new();
+   static int preSelectedSignal = SIGNALSPANEL_INITSELECTEDSIGNAL;
+
+   Panel* signalsPanel = SignalsPanel_new(preSelectedSignal);
    const ListItem* sgn = (ListItem*) Action_pickFromVector(st, signalsPanel, 14, true);
    if (sgn && sgn->key != 0) {
+      preSelectedSignal = sgn->key;
       Panel_setHeader((Panel*)st->mainPanel, "Sending...");
       Panel_draw((Panel*)st->mainPanel, false, true, true, State_hideFunctionBar(st));
       refresh();
@@ -459,6 +506,7 @@ static const struct {
    bool roInactive;
    const char* info;
 } helpLeft[] = {
+   { .key = "    Tab: ",  .roInactive = false, .info = "switch to next screen tab" },
    { .key = " Arrows: ",  .roInactive = false, .info = "scroll process list" },
    { .key = " Digits: ",  .roInactive = false, .info = "incremental PID search" },
    { .key = "   F3 /: ",  .roInactive = false, .info = "incremental name search" },
@@ -483,12 +531,13 @@ static const struct {
    bool roInactive;
    const char* info;
 } helpRight[] = {
+   { .key = "  S-Tab: ", .roInactive = false, .info = "switch to previous screen tab" },
    { .key = "  Space: ", .roInactive = false, .info = "tag process" },
    { .key = "      c: ", .roInactive = false, .info = "tag process and its children" },
    { .key = "      U: ", .roInactive = false, .info = "untag all processes" },
    { .key = "   F9 k: ", .roInactive = true,  .info = "kill process/tagged processes" },
    { .key = "   F7 ]: ", .roInactive = true,  .info = "higher priority (root only)" },
-   { .key = "   F8 [: ", .roInactive = false, .info = "lower priority (+ nice)" },
+   { .key = "   F8 [: ", .roInactive = true,  .info = "lower priority (+ nice)" },
 #if (defined(HAVE_LIBHWLOC) || defined(HAVE_AFFINITY))
    { .key = "      a: ", .roInactive = true, .info = "set CPU affinity" },
 #endif
@@ -525,46 +574,57 @@ static Htop_Reaction actionHelp(State* st) {
    line++;
    mvaddstr(line++, 0, "CPU usage bar: ");
 
+#define addbartext(attr, prefix, text)               \
+   do {                                              \
+      addattrstr(CRT_colors[DEFAULT_COLOR], prefix); \
+      addattrstr(attr, text);                        \
+   } while(0)
+
    addattrstr(CRT_colors[BAR_BORDER], "[");
+   addbartext(CRT_colors[CPU_NICE_TEXT], "", "low");
+   addbartext(CRT_colors[CPU_NORMAL], "/", "normal");
+   addbartext(CRT_colors[CPU_SYSTEM], "/", "kernel");
    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("/");
-      addattrstr(CRT_colors[CPU_IRQ], "irq"); addstr("/");
-      addattrstr(CRT_colors[CPU_SOFTIRQ], "soft-irq"); addstr("/");
-      addattrstr(CRT_colors[CPU_STEAL], "steal"); addstr("/");
-      addattrstr(CRT_colors[CPU_GUEST], "guest"); addstr("/");
-      addattrstr(CRT_colors[CPU_IOWAIT], "io-wait");
-      addattrstr(CRT_colors[BAR_SHADOW], " used%");
+      addbartext(CRT_colors[CPU_IRQ], "/", "irq");
+      addbartext(CRT_colors[CPU_SOFTIRQ], "/", "soft-irq");
+      addbartext(CRT_colors[CPU_STEAL], "/", "steal");
+      addbartext(CRT_colors[CPU_GUEST], "/", "guest");
+      addbartext(CRT_colors[CPU_IOWAIT], "/", "io-wait");
+      addbartext(CRT_colors[BAR_SHADOW], " ", "used%");
    } else {
-      addattrstr(CRT_colors[CPU_NICE_TEXT], "low-priority"); addstr("/");
-      addattrstr(CRT_colors[CPU_NORMAL], "normal"); addstr("/");
-      addattrstr(CRT_colors[CPU_SYSTEM], "kernel"); addstr("/");
-      addattrstr(CRT_colors[CPU_GUEST], "virtualized");
-      addattrstr(CRT_colors[BAR_SHADOW], "             used%");
+      addbartext(CRT_colors[CPU_GUEST], "/", "guest");
+      addbartext(CRT_colors[BAR_SHADOW], "                  ", "used%");
    }
    addattrstr(CRT_colors[BAR_BORDER], "]");
+
    attrset(CRT_colors[DEFAULT_COLOR]);
    mvaddstr(line++, 0, "Memory bar:    ");
    addattrstr(CRT_colors[BAR_BORDER], "[");
-   addattrstr(CRT_colors[MEMORY_USED], "used"); addstr("/");
-   addattrstr(CRT_colors[MEMORY_BUFFERS_TEXT], "buffers"); addstr("/");
-   addattrstr(CRT_colors[MEMORY_SHARED], "shared"); addstr("/");
-   addattrstr(CRT_colors[MEMORY_CACHE], "cache");
-   addattrstr(CRT_colors[BAR_SHADOW], "                     used/total");
+   addbartext(CRT_colors[MEMORY_USED], "", "used");
+   addbartext(CRT_colors[MEMORY_BUFFERS_TEXT], "/", "buffers");
+   addbartext(CRT_colors[MEMORY_SHARED], "/", "shared");
+   addbartext(CRT_colors[MEMORY_CACHE], "/", "cache");
+   addbartext(CRT_colors[BAR_SHADOW], "                     ", "used");
+   addbartext(CRT_colors[BAR_SHADOW], "/", "total");
    addattrstr(CRT_colors[BAR_BORDER], "]");
+
    attrset(CRT_colors[DEFAULT_COLOR]);
    mvaddstr(line++, 0, "Swap bar:      ");
    addattrstr(CRT_colors[BAR_BORDER], "[");
-   addattrstr(CRT_colors[SWAP], "used");
+   addbartext(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");
+   addbartext(CRT_colors[SWAP_CACHE], "/", "cache");
 #else
-   addattrstr(CRT_colors[BAR_SHADOW], "                                          used/total");
+   addbartext(CRT_colors[SWAP_CACHE], "      ", "");
 #endif
+   addbartext(CRT_colors[BAR_SHADOW], "                                    ", "used");
+   addbartext(CRT_colors[BAR_SHADOW], "/", "total");
    addattrstr(CRT_colors[BAR_BORDER], "]");
+
+   line++;
+
+#undef addbartext
+
    attrset(CRT_colors[DEFAULT_COLOR]);
    mvaddstr(line++, 0, "Type and layout of header meters are configurable in the setup screen.");
    if (CRT_colorScheme == COLORSCHEME_MONOCHROME) {
@@ -572,9 +632,23 @@ static Htop_Reaction actionHelp(State* st) {
    }
    line++;
 
-   mvaddstr(line++, 0, "Process state: R: running; S: sleeping; T: traced/stopped; Z: zombie; D: disk sleep");
+#define addattrstatestr(attr, state, desc)              \
+   do {                                                 \
+      addattrstr(attr, state);                          \
+      addattrstr(CRT_colors[DEFAULT_COLOR], ": " desc); \
+   } while(0)
 
-   line++;
+   mvaddstr(line, 0, "Process state: ");
+   addattrstatestr(CRT_colors[PROCESS_RUN_STATE], "R", "running; ");
+   addattrstatestr(CRT_colors[PROCESS_SHADOW], "S", "sleeping; ");
+   addattrstatestr(CRT_colors[PROCESS_RUN_STATE], "t", "traced/stopped; ");
+   addattrstatestr(CRT_colors[PROCESS_D_STATE], "Z", "zombie; ");
+   addattrstatestr(CRT_colors[PROCESS_D_STATE], "D", "disk sleep");
+   attrset(CRT_colors[DEFAULT_COLOR]);
+
+#undef addattrstatestr
+
+   line += 2;
 
    const bool readonly = Settings_isReadonly();
 
@@ -711,4 +785,6 @@ void Action_setBindings(Htop_Action* keys) {
    keys[KEY_F(10)] = actionQuit;
    keys[KEY_F(18)] = actionExpandCollapseOrSortColumn;
    keys[KEY_RECLICK] = actionExpandOrCollapse;
+   keys[KEY_SHIFT_TAB] = actionPrevScreen;
+   keys['\t'] = actionNextScreen;
 }

Action.h

@@ -57,6 +57,8 @@ bool Action_setUserOnly(const char* userName, uid_t* userId);
 
 Htop_Reaction Action_setSortKey(Settings* settings, ProcessField sortKey);
 
+Htop_Reaction Action_setScreenTab(Settings* settings, int x);
+
 Htop_Reaction Action_follow(State* st);
 
 void Action_setBindings(Htop_Action* keys);

AvailableMetersPanel.c

@@ -79,6 +79,7 @@ static HandlerResult AvailableMetersPanel_eventHandler(Panel* super, int ch) {
    }
    if (update) {
       this->settings->changed = true;
+      this->settings->lastUpdate++;
       Header_calculateHeight(header);
       Header_updateData(header);
       Header_draw(header);

CRT.c

@@ -13,6 +13,7 @@ in the source distribution for its full text.
 #include <fcntl.h>
 #include <langinfo.h>
 #include <signal.h>
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -37,7 +38,6 @@ in the source distribution for its full text.
 #include <execinfo.h>
 #endif
 
-
 #define ColorIndex(i, j) ((7 - (i)) * 8 + (j))
 
 #define ColorPair(i, j) COLOR_PAIR(ColorIndex(i, j))
@@ -94,7 +94,8 @@ static const int* CRT_delay;
 
 const char *CRT_degreeSign;
 
-static const char* initDegreeSign(void) {
+static const char *initDegreeSign(void)
+{
 #ifdef HAVE_LIBNCURSESW
    if (CRT_utf8)
       return "\xc2\xb0";
@@ -126,6 +127,8 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [FAILED_READ] = A_BOLD | ColorPair(Red, Black),
         [PAUSED] = A_BOLD | ColorPair(Yellow, Cyan),
         [UPTIME] = A_BOLD | ColorPair(Cyan, Black),
+        [TEMP] = A_BOLD | ColorPair(Cyan, Black),
+        [FREQ] = A_BOLD | ColorPair(Cyan, Black),
         [BATTERY] = A_BOLD | ColorPair(Cyan, Black),
         [LARGE_NUMBER] = A_BOLD | ColorPair(Red, Black),
         [METER_SHADOW] = A_BOLD | ColorPairGrayBlack,
@@ -193,6 +196,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [CPU_SOFTIRQ] = ColorPair(Magenta, Black),
         [CPU_STEAL] = ColorPair(Cyan, Black),
         [CPU_GUEST] = ColorPair(Cyan, Black),
+        [PANEL_EDIT] = ColorPair(White, Blue),
+        [SCREENS_OTH_BORDER] = ColorPair(Blue, Blue),
+        [SCREENS_OTH_TEXT] = ColorPair(Black, Blue),
+        [SCREENS_CUR_BORDER] = ColorPair(Green, Green),
+        [SCREENS_CUR_TEXT] = ColorPair(Black, Green),
         [PRESSURE_STALL_THREEHUNDRED] = ColorPair(Cyan, Black),
         [PRESSURE_STALL_SIXTY] = A_BOLD | ColorPair(Cyan, Black),
         [PRESSURE_STALL_TEN] = A_BOLD | ColorPair(White, Black),
@@ -228,6 +236,8 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [FAILED_READ] = A_BOLD,
         [PAUSED] = A_BOLD | A_REVERSE,
         [UPTIME] = A_BOLD,
+        [TEMP] = A_BOLD,
+        [FREQ] = A_BOLD,
         [BATTERY] = A_BOLD,
         [LARGE_NUMBER] = A_BOLD,
         [METER_SHADOW] = A_DIM,
@@ -295,6 +305,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [CPU_SOFTIRQ] = A_BOLD,
         [CPU_STEAL] = A_DIM,
         [CPU_GUEST] = A_DIM,
+        [PANEL_EDIT] = A_BOLD,
+        [SCREENS_OTH_BORDER] = A_DIM,
+        [SCREENS_OTH_TEXT] = A_DIM,
+        [SCREENS_CUR_BORDER] = A_REVERSE,
+        [SCREENS_CUR_TEXT] = A_REVERSE,
         [PRESSURE_STALL_THREEHUNDRED] = A_DIM,
         [PRESSURE_STALL_SIXTY] = A_NORMAL,
         [PRESSURE_STALL_TEN] = A_BOLD,
@@ -330,6 +345,8 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [FAILED_READ] = ColorPair(Red, White),
         [PAUSED] = A_BOLD | ColorPair(Yellow, Cyan),
         [UPTIME] = ColorPair(Yellow, White),
+        [TEMP] = ColorPair(Yellow, White),
+        [FREQ] = ColorPair(Yellow, White),
         [BATTERY] = ColorPair(Yellow, White),
         [LARGE_NUMBER] = ColorPair(Red, White),
         [METER_SHADOW] = ColorPair(Blue, White),
@@ -397,6 +414,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [CPU_SOFTIRQ] = ColorPair(Blue, White),
         [CPU_STEAL] = ColorPair(Cyan, White),
         [CPU_GUEST] = ColorPair(Cyan, White),
+        [PANEL_EDIT] = ColorPair(White, Blue),
+        [SCREENS_OTH_BORDER] = A_BOLD | ColorPair(Black, White),
+        [SCREENS_OTH_TEXT] = A_BOLD | ColorPair(Black, White),
+        [SCREENS_CUR_BORDER] = ColorPair(Green, Green),
+        [SCREENS_CUR_TEXT] = ColorPair(Black, Green),
         [PRESSURE_STALL_THREEHUNDRED] = ColorPair(Black, White),
         [PRESSURE_STALL_SIXTY] = ColorPair(Black, White),
         [PRESSURE_STALL_TEN] = ColorPair(Black, White),
@@ -432,6 +454,8 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [FAILED_READ] = ColorPair(Red, Black),
         [PAUSED] = A_BOLD | ColorPair(Yellow, Cyan),
         [UPTIME] = ColorPair(Yellow, Black),
+        [TEMP] = ColorPair(Yellow, Black),
+        [FREQ] = ColorPair(Yellow, Black),
         [BATTERY] = ColorPair(Yellow, Black),
         [LARGE_NUMBER] = ColorPair(Red, Black),
         [METER_SHADOW] = A_BOLD | ColorPairGrayBlack,
@@ -499,6 +523,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [CPU_SOFTIRQ] = ColorPair(Blue, Black),
         [CPU_STEAL] = ColorPair(Black, Black),
         [CPU_GUEST] = ColorPair(Black, Black),
+        [PANEL_EDIT] = ColorPair(White, Blue),
+        [SCREENS_OTH_BORDER] = ColorPair(Blue, Black),
+        [SCREENS_OTH_TEXT] = ColorPair(Blue, Black),
+        [SCREENS_CUR_BORDER] = ColorPair(Green, Green),
+        [SCREENS_CUR_TEXT] = ColorPair(Black, Green),
         [PRESSURE_STALL_THREEHUNDRED] = ColorPair(Black, Black),
         [PRESSURE_STALL_SIXTY] = ColorPair(Black, Black),
         [PRESSURE_STALL_TEN] = ColorPair(Black, Black),
@@ -534,6 +563,8 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [FAILED_READ] = A_BOLD | ColorPair(Red, Blue),
         [PAUSED] = A_BOLD | ColorPair(Yellow, Cyan),
         [UPTIME] = A_BOLD | ColorPair(Yellow, Blue),
+        [TEMP] = A_BOLD | ColorPair(Yellow, Blue),
+        [FREQ] = A_BOLD | ColorPair(Yellow, Blue),
         [BATTERY] = A_BOLD | ColorPair(Yellow, Blue),
         [LARGE_NUMBER] = A_BOLD | ColorPair(Red, Blue),
         [METER_SHADOW] = ColorPair(Cyan, Blue),
@@ -601,6 +632,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [CPU_SOFTIRQ] = ColorPair(Black, Blue),
         [CPU_STEAL] = ColorPair(White, Blue),
         [CPU_GUEST] = ColorPair(White, Blue),
+        [PANEL_EDIT] = ColorPair(White, Blue),
+        [SCREENS_OTH_BORDER] = A_BOLD | ColorPair(Yellow, Blue),
+        [SCREENS_OTH_TEXT] = ColorPair(Cyan, Blue),
+        [SCREENS_CUR_BORDER] = ColorPair(Cyan, Cyan),
+        [SCREENS_CUR_TEXT] = ColorPair(Black, Cyan),
         [PRESSURE_STALL_THREEHUNDRED] = A_BOLD | ColorPair(Black, Blue),
         [PRESSURE_STALL_SIXTY] = A_NORMAL | ColorPair(White, Blue),
         [PRESSURE_STALL_TEN] = A_BOLD | ColorPair(White, Blue),
@@ -636,6 +672,8 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [FAILED_READ] = A_BOLD | ColorPair(Red, Black),
         [PAUSED] = A_BOLD | ColorPair(Yellow, Green),
         [UPTIME] = ColorPair(Green, Black),
+        [TEMP] = ColorPair(Green, Black),
+        [FREQ] = ColorPair(Green, Black),
         [BATTERY] = ColorPair(Green, Black),
         [LARGE_NUMBER] = A_BOLD | ColorPair(Red, Black),
         [METER_SHADOW] = A_BOLD | ColorPairGrayBlack,
@@ -701,6 +739,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
         [CPU_SOFTIRQ] = ColorPair(Blue, Black),
         [CPU_STEAL] = ColorPair(Cyan, Black),
         [CPU_GUEST] = ColorPair(Cyan, Black),
+        [PANEL_EDIT] = ColorPair(White, Cyan),
+        [SCREENS_OTH_BORDER] = ColorPair(White, Black),
+        [SCREENS_OTH_TEXT] = ColorPair(Cyan, Black),
+        [SCREENS_CUR_BORDER] = A_BOLD | ColorPair(White, Black),
+        [SCREENS_CUR_TEXT] = A_BOLD | ColorPair(Green, Black),
         [PRESSURE_STALL_THREEHUNDRED] = ColorPair(Green, Black),
         [PRESSURE_STALL_SIXTY] = ColorPair(Green, Black),
         [PRESSURE_STALL_TEN] = A_BOLD | ColorPair(Green, Black),
@@ -725,8 +768,6 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
     [COLORSCHEME_BROKENGRAY] = {0} // dynamically generated.
 };
 
-int CRT_cursorX = 0;
-
 int CRT_scrollHAmount = 5;
 
 int CRT_scrollWheelVAmount = 10;
@@ -734,7 +775,8 @@ int CRT_scrollWheelVAmount = 10;
 ColorScheme CRT_colorScheme = COLORSCHEME_DEFAULT;
 
 ATTR_NORETURN
-static void CRT_handleSIGTERM(ATTR_UNUSED int sgn) {
+static void CRT_handleSIGTERM(ATTR_UNUSED int sgn)
+{
    CRT_done();
    _exit(0);
 }
@@ -744,7 +786,8 @@ static void CRT_handleSIGTERM(ATTR_UNUSED int sgn) {
 static int stderrRedirectNewFd = -1;
 static int stderrRedirectBackupFd = -1;
 
-static int createStderrCacheFile(void) {
+static int createStderrCacheFile(void)
+{
 #if defined(HAVE_MEMFD_CREATE)
    return memfd_create("htop.stderr-redirect", 0);
 #elif defined(O_TMPFILE)
@@ -763,9 +806,11 @@ static int createStderrCacheFile(void) {
 #endif /* HAVE_MEMFD_CREATE */
 }
 
-static void redirectStderr(void) {
+static void redirectStderr(void)
+{
    stderrRedirectNewFd = createStderrCacheFile();
-   if (stderrRedirectNewFd < 0) {
+   if (stderrRedirectNewFd < 0)
+   {
       /* ignore failure */
       return;
    }
@@ -774,7 +819,8 @@ static void redirectStderr(void) {
    dup2(stderrRedirectNewFd, STDERR_FILENO);
 }
 
-static void dumpStderr(void) {
+static void dumpStderr(void)
+{
    if (stderrRedirectNewFd < 0)
       return;
 
@@ -786,22 +832,27 @@ static void dumpStderr(void) {
 
    bool header = false;
    char buffer[8192];
-   for (;;) {
+   for (;;)
+   {
       errno = 0;
       ssize_t res = read(stderrRedirectNewFd, buffer, sizeof(buffer));
-      if (res < 0) {
+      if (res < 0)
+      {
          if (errno == EINTR)
             continue;
 
          break;
       }
 
-      if (res == 0) {
+      if (res == 0)
+      {
          break;
       }
 
-      if (res > 0) {
-         if (!header) {
+      if (res > 0)
+      {
+         if (!header)
+         {
             fprintf(stderr, ">>>>>>>>>> stderr output >>>>>>>>>>\n");
             header = true;
          }
@@ -816,19 +867,33 @@ static void dumpStderr(void) {
    stderrRedirectNewFd = -1;
 }
 
-#else /* !NDEBUG */
+void CRT_debug_impl(const char *file, size_t lineno, const char *func, const char *fmt, ...)
+{
+   va_list args;
 
-static void redirectStderr(void) {
+   fprintf(stderr, "[%s:%zu (%s)]: ", file, lineno, func);
+   va_start(args, fmt);
+   vfprintf(stderr, fmt, args);
+   va_end(args);
+   fprintf(stderr, "\n");
 }
 
-static void dumpStderr(void) {
+#else /* !NDEBUG */
+
+static void redirectStderr(void)
+{
+}
+
+static void dumpStderr(void)
+{
 }
 
 #endif /* !NDEBUG */
 
 static struct sigaction old_sig_handler[32];
 
-static void CRT_installSignalHandlers(void) {
+static void CRT_installSignalHandlers(void)
+{
    struct sigaction act;
    sigemptyset(&act.sa_mask);
    act.sa_flags = (int)SA_RESETHAND | SA_NODEFER;
@@ -841,12 +906,14 @@ static void CRT_installSignalHandlers(void) {
    sigaction(SIGSYS, &act, &old_sig_handler[SIGSYS]);
    sigaction(SIGABRT, &act, &old_sig_handler[SIGABRT]);
 
+   signal(SIGCHLD, SIG_DFL);
    signal(SIGINT, CRT_handleSIGTERM);
    signal(SIGTERM, CRT_handleSIGTERM);
    signal(SIGQUIT, CRT_handleSIGTERM);
 }
 
-void CRT_resetSignalHandlers(void) {
+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);
@@ -860,7 +927,26 @@ void CRT_resetSignalHandlers(void) {
    signal(SIGQUIT, SIG_DFL);
 }
 
-void CRT_init(const Settings* settings, bool allowUnicode) {
+void CRT_setMouse(bool enabled)
+{
+#ifdef HAVE_GETMOUSE
+   if (enabled)
+   {
+#if NCURSES_MOUSE_VERSION > 1
+      mousemask(BUTTON1_RELEASED | BUTTON4_PRESSED | BUTTON5_PRESSED, NULL);
+#else
+      mousemask(BUTTON1_RELEASED, NULL);
+#endif
+   }
+   else
+   {
+      mousemask(0, NULL);
+   }
+#endif
+}
+
+void CRT_init(const Settings *settings, bool allowUnicode)
+{
    redirectStderr();
 
    initscr();
@@ -870,7 +956,8 @@ void CRT_init(const Settings* settings, bool allowUnicode) {
    CRT_colors = CRT_colorSchemes[settings->colorScheme];
    CRT_colorScheme = settings->colorScheme;
 
-   for (int i = 0; i < LAST_COLORELEMENT; i++) {
+   for (int i = 0; i < LAST_COLORELEMENT; i++)
+   {
       unsigned int color = CRT_colorSchemes[COLORSCHEME_DEFAULT][i];
       CRT_colorSchemes[COLORSCHEME_BROKENGRAY][i] = color == (A_BOLD | ColorPairGrayBlack) ? ColorPair(White, Black) : color;
    }
@@ -884,18 +971,23 @@ void CRT_init(const Settings* settings, bool allowUnicode) {
 #endif
    curs_set(0);
 
-   if (has_colors()) {
+   if (has_colors())
+   {
       start_color();
    }
 
    const char *termType = getenv("TERM");
-   if (termType && String_eq(termType, "linux")) {
+   if (termType && String_eq(termType, "linux"))
+   {
       CRT_scrollHAmount = 20;
-   } else {
+   }
+   else
+   {
       CRT_scrollHAmount = 5;
    }
 
-   if (termType && (String_startsWith(termType, "xterm") || String_eq(termType, "vt220"))) {
+   if (termType && (String_startsWith(termType, "xterm") || String_eq(termType, "vt220")))
+   {
 #ifdef HTOP_NETBSD
 #define define_key(s_, k_) define_key((char *)s_, k_)
       IGNORE_WCASTQUAL_BEGIN
@@ -915,8 +1007,10 @@ IGNORE_WCASTQUAL_BEGIN
       define_key("\033[14~", KEY_F(4));
       define_key("\033[14;2~", KEY_F(15));
       define_key("\033[17;2~", KEY_F(18));
+      define_key("\033[Z", KEY_SHIFT_TAB);
       char sequence[3] = "\033a";
-      for (char c = 'a'; c <= 'z'; c++) {
+      for (char c = 'a'; c <= 'z'; c++)
+      {
          sequence[1] = c;
          define_key(sequence, KEY_ALT('A' + (c - 'a')));
       }
@@ -925,6 +1019,10 @@ IGNORE_WCASTQUAL_END
 #undef define_key
 #endif
    }
+   if (termType && (String_startsWith(termType, "rxvt")))
+   {
+      define_key("\033[Z", KEY_SHIFT_TAB);
+   }
 
    CRT_installSignalHandlers();
 
@@ -934,9 +1032,12 @@ IGNORE_WCASTQUAL_END
    CRT_setColors(CRT_colorScheme);
 
 #ifdef HAVE_LIBNCURSESW
-   if (allowUnicode && String_eq(nl_langinfo(CODESET), "UTF-8")) {
+   if (allowUnicode && String_eq(nl_langinfo(CODESET), "UTF-8"))
+   {
       CRT_utf8 = true;
-   } else {
+   }
+   else
+   {
       CRT_utf8 = false;
    }
 #else
@@ -949,32 +1050,36 @@ IGNORE_WCASTQUAL_END
 #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_setMouse(settings->enableMouse);
 
    CRT_degreeSign = initDegreeSign();
 }
 
-void CRT_done() {
+void CRT_done()
+{
+   int resetColor = CRT_colors ? CRT_colors[RESET_COLOR] : CRT_colorSchemes[COLORSCHEME_DEFAULT][RESET_COLOR];
+
+   attron(resetColor);
+   mvhline(LINES - 1, 0, ' ', COLS);
+   attroff(resetColor);
+   refresh();
+
    curs_set(1);
    endwin();
 
    dumpStderr();
 }
 
-void CRT_fatalError(const char* note) {
+void CRT_fatalError(const char *note)
+{
    const char *sysMsg = strerror(errno);
    CRT_done();
    fprintf(stderr, "%s: %s\n", note, sysMsg);
    exit(2);
 }
 
-int CRT_readKey() {
+int CRT_readKey()
+{
    nocbreak();
    cbreak();
    nodelay(stdscr, FALSE);
@@ -983,22 +1088,28 @@ int CRT_readKey() {
    return ret;
 }
 
-void CRT_disableDelay() {
+void CRT_disableDelay()
+{
    nocbreak();
    cbreak();
    nodelay(stdscr, TRUE);
 }
 
-void CRT_enableDelay() {
+void CRT_enableDelay()
+{
    halfdelay(*CRT_delay);
 }
 
-void CRT_setColors(int colorScheme) {
+void CRT_setColors(int colorScheme)
+{
    CRT_colorScheme = colorScheme;
 
-   for (short int i = 0; i < 8; i++) {
-      for (short int j = 0; j < 8; j++) {
-         if (ColorIndex(i, j) != ColorIndexGrayBlack && ColorIndex(i, j) != ColorIndexWhiteDefault) {
+   for (short int i = 0; i < 8; i++)
+   {
+      for (short int j = 0; j < 8; j++)
+      {
+         if (ColorIndex(i, j) != ColorIndexGrayBlack && ColorIndex(i, j) != ColorIndexWhiteDefault)
+         {
             short int bg = (colorScheme != COLORSCHEME_BLACKNIGHT)
                                ? (j == 0 ? -1 : j)
                                : j;
@@ -1017,7 +1128,8 @@ void CRT_setColors(int colorScheme) {
 }
 
 #ifdef PRINT_BACKTRACE
-static void print_backtrace(void) {
+static void print_backtrace(void)
+{
 #if defined(HAVE_LIBUNWIND_H) && defined(HAVE_LIBUNWIND)
    unw_context_t context;
    unw_getcontext(&context);
@@ -1027,7 +1139,8 @@ static void print_backtrace(void) {
 
    unsigned int item = 0;
 
-   while (unw_step(&cursor) > 0) {
+   while (unw_step(&cursor) > 0)
+   {
       unw_word_t pc;
       unw_get_reg(&cursor, UNW_REG_IP, &pc);
       if (pc == 0)
@@ -1042,7 +1155,8 @@ static void print_backtrace(void) {
 
       const char *fname = "?";
       const void *ptr = 0;
-      if (unw_get_proc_info(&cursor, &pip) == 0) {
+      if (unw_get_proc_info(&cursor, &pip) == 0)
+      {
          ptr = (const void *)(pip.start_ip + offset);
 
 #ifdef HAVE_DLADDR
@@ -1069,7 +1183,8 @@ static void print_backtrace(void) {
 }
 #endif
 
-void CRT_handleSIGSEGV(int signal) {
+void CRT_handleSIGSEGV(int signal)
+{
    CRT_done();
 
    fprintf(stderr, "\n\n"
@@ -1080,19 +1195,18 @@ void CRT_handleSIGSEGV(int signal) {
                    "  - 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"
-   );
+                   "  - Likely steps to reproduce (How did it happen?)\n");
 
 #ifdef PRINT_BACKTRACE
    fprintf(stderr, "  - Backtrace of the issue (see below)\n");
 #endif
 
    fprintf(stderr,
-      "\n"
-   );
+           "\n");
 
    const char *signal_str = strsignal(signal);
-   if (!signal_str) {
+   if (!signal_str)
+   {
       signal_str = "unknown reason";
    }
    fprintf(stderr,
@@ -1100,8 +1214,7 @@ void CRT_handleSIGSEGV(int signal) {
            "------------------\n"
            "A signal %d (%s) was received.\n"
            "\n",
-      signal, signal_str
-   );
+           signal, signal_str);
 
    fprintf(stderr,
            "Setting information:\n"
@@ -1112,8 +1225,7 @@ void CRT_handleSIGSEGV(int signal) {
 #ifdef PRINT_BACKTRACE
    fprintf(stderr,
            "Backtrace information:\n"
-      "----------------------\n"
-   );
+           "----------------------\n");
 
    print_backtrace();
 
@@ -1122,8 +1234,7 @@ void CRT_handleSIGSEGV(int signal) {
            "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"
-   );
+           "\n");
 
 #ifdef HTOP_DARWIN
    fprintf(stderr, "   otool -tvV `which " PACKAGE "` > ~/htop.otool\n");
@@ -1133,23 +1244,21 @@ void CRT_handleSIGSEGV(int signal) {
 
    fprintf(stderr,
            "\n"
-      "Please include the generated file in your report.\n"
-   );
+           "Please include the generated file in your report.\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 " PACKAGE "!\n"
-      "\n"
-   );
+           "\n");
 
    /* Call old sigsegv handler; may be default exit or third party one (e.g. ASAN) */
-   if (sigaction (signal, &old_sig_handler[signal], NULL) < 0) {
+   if (sigaction(signal, &old_sig_handler[signal], NULL) < 0)
+   {
       /* This avoids an infinite loop in case the handler could not be reset. */
       fprintf(stderr,
-         "!!! Chained handler could not be restored. Forcing exit.\n"
-      );
+              "!!! Chained handler could not be restored. Forcing exit.\n");
       _exit(1);
    }
 
@@ -1158,7 +1267,6 @@ void CRT_handleSIGSEGV(int signal) {
 
    // Always terminate, even if installed handler returns
    fprintf(stderr,
-      "!!! Chained handler did not exit. Forcing exit.\n"
-   );
+           "!!! Chained handler did not exit. Forcing exit.\n");
    _exit(1);
 }

CRT.h

@@ -15,8 +15,8 @@ in the source distribution for its full text.
 #include "ProvideCurses.h"
 #include "Settings.h"
 
-
-typedef enum TreeStr_ {
+typedef enum TreeStr_
+{
    TREE_STR_VERT,
    TREE_STR_RTEE,
    TREE_STR_BEND,
@@ -28,7 +28,8 @@ typedef enum TreeStr_ {
    LAST_TREE_STR
 } TreeStr;
 
-typedef enum ColorScheme_ {
+typedef enum ColorScheme_
+{
    COLORSCHEME_DEFAULT,
    COLORSCHEME_MONOCHROME,
    COLORSCHEME_BLACKONWHITE,
@@ -39,7 +40,8 @@ typedef enum ColorScheme_ {
    LAST_COLORSCHEME
 } ColorScheme;
 
-typedef enum ColorElements_ {
+typedef enum ColorElements_
+{
    RESET_COLOR,
    DEFAULT_COLOR,
    FUNCTION_BAR,
@@ -64,6 +66,8 @@ typedef enum ColorElements_ {
    METER_VALUE_WARN,
    LED_COLOR,
    UPTIME,
+   TEMP,
+   FREQ,
    BATTERY,
    TASKS_RUNNING,
    SWAP,
@@ -120,6 +124,11 @@ typedef enum ColorElements_ {
    CPU_SOFTIRQ,
    CPU_STEAL,
    CPU_GUEST,
+   PANEL_EDIT,
+   SCREENS_OTH_BORDER,
+   SCREENS_OTH_TEXT,
+   SCREENS_CUR_BORDER,
+   SCREENS_CUR_TEXT,
    PRESSURE_STALL_TEN,
    PRESSURE_STALL_SIXTY,
    PRESSURE_STALL_THREEHUNDRED,
@@ -145,11 +154,19 @@ typedef enum ColorElements_ {
 
 void CRT_fatalError(const char *note) ATTR_NORETURN;
 
+#ifdef NDEBUG
+#define CRT_debug(...)
+#else
+void CRT_debug_impl(const char *file, size_t lineno, const char *func, const char *fmt, ...) ATTR_FORMAT(printf, 4, 5);
+#define CRT_debug(...) CRT_debug_impl(__FILE__, __LINE__, __func__, __VA_ARGS__)
+#endif
+
 void CRT_handleSIGSEGV(int signal) ATTR_NORETURN;
 
 #define KEY_WHEELUP KEY_F(30)
 #define KEY_WHEELDOWN KEY_F(31)
 #define KEY_RECLICK KEY_F(32)
+#define KEY_SHIFT_TAB KEY_F(33)
 #define KEY_ALT(x) (KEY_F(64 - 26) + ((x) - 'A'))
 
 extern const char *CRT_degreeSign;
@@ -172,6 +189,8 @@ extern int CRT_scrollWheelVAmount;
 
 extern ColorScheme CRT_colorScheme;
 
+void CRT_setMouse(bool enabled);
+
 void CRT_init(const Settings *settings, bool allowUnicode);
 
 void CRT_done(void);

CategoriesPanel.c

@@ -14,7 +14,6 @@ in the source distribution for its full text.
 #include "AvailableColumnsPanel.h"
 #include "AvailableMetersPanel.h"
 #include "ColorsPanel.h"
-#include "ColumnsPanel.h"
 #include "DisplayOptionsPanel.h"
 #include "FunctionBar.h"
 #include "Header.h"
@@ -25,6 +24,7 @@ in the source distribution for its full text.
 #include "MetersPanel.h"
 #include "Object.h"
 #include "ProvideCurses.h"
+#include "ScreensPanel.h"
 #include "Vector.h"
 #include "XUtils.h"
 
@@ -69,9 +69,11 @@ static void CategoriesPanel_makeColorsPage(CategoriesPanel* this) {
    ScreenManager_add(this->scr, colors, -1);
 }
 
-static void CategoriesPanel_makeColumnsPage(CategoriesPanel* this) {
-   Panel* columns = (Panel*) ColumnsPanel_new(this->settings);
+static void CategoriesPanel_makeScreensPage(CategoriesPanel* this) {
+   Panel* screens = (Panel*) ScreensPanel_new(this->settings);
+   Panel* columns = (Panel*) ((ScreensPanel*)screens)->columns;
    Panel* availableColumns = (Panel*) AvailableColumnsPanel_new(columns, this->settings->dynamicColumns);
+   ScreenManager_add(this->scr, screens, 20);
    ScreenManager_add(this->scr, columns, 20);
    ScreenManager_add(this->scr, availableColumns, -1);
 }
@@ -91,7 +93,7 @@ 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 = "Screens", .ctor = CategoriesPanel_makeScreensPage },
    { .name = "Colors", .ctor = CategoriesPanel_makeColorsPage },
 };
 
@@ -157,7 +159,7 @@ CategoriesPanel* CategoriesPanel_new(ScreenManager* scr, Settings* settings, Hea
    this->settings = settings;
    this->header = header;
    this->pl = pl;
-   Panel_setHeader(super, "Setup");
+   Panel_setHeader(super, "Categories");
    for (size_t i = 0; i < ARRAYSIZE(categoriesPanelPages); i++)
       Panel_add(super, (Object*) ListItem_new(categoriesPanelPages[i].name, 0));
 

ChangeLog

@@ -1,3 +1,57 @@
+What's new in version 3.2.1
+
+* Fix setting to show all branches collapsed by default
+* Restore functionality of stripExeFromCmdline setting
+* Fix some command line display settings not being honored without restart
+* Display single digit precision for CPU% greater than 99.9%
+* On Linux, FreeBSD and PCP consider only shrinkable ZFS ARC as cache
+* On Linux, increase field width of CPUD% and SWAPD% columns
+* Colorize process state characters in help screen
+* Use mousemask(3X) to enable and disable mouse control
+* Fix heap buffer overflow in Vector_compact
+* On Solaris, fix a process time scaling error
+* On Solaris, fix the build
+* On NetBSD, OpenBSD and Solaris ensure env buffer size is sufficient
+* On Linux, resolve processes exiting interfering with sampling
+* Fix ProcessList quadratic removal when scanning processes
+* Under LXC, limit CPU count to that given by /proc/cpuinfo
+* Improve container detection for LXC
+* Some minor documentation fixes
+
+What's new in version 3.2.0
+
+* Support for displaying multiple tabs in the user interface
+* Allow multiple filter and search terms (logical OR, separate by "|")
+* Set correct default sorting direction (defaultSortDesc)
+* Improve performance for process lookup and update
+* Rework the IOMeters initial display
+* Removed duplicate sections on COMM and EXE
+* Highlight process UNINTERRUPTIBLE_WAIT state (D)
+* Show only integer value when CPU% more than 99.9%
+* Handle rounding ambiguity between 99.9 and 100.0%
+* No longer leaves empty the last column in header
+* Fix header layout and meters reset if a header column is empty
+* Fix PID and UID column widths off-by-one error
+* On Linux, read generic sysfs batteries
+* On Linux, do not collect LRS per thread (it is process-wide)
+* On Linux, dynamically adjust the SECATTR and CGROUP column widths
+* On Linux, fix a crash in LXD
+* On FreeBSD, add support for showing process emulation
+* On Darwin, lazily set process TTY name
+* Always set SIGCHLD to default handling
+* Avoid zombie processes on signal races
+* Ensure last line is cleared when SIGINT is received
+* Instead of SIGTERM, pre-select the last sent signal
+* Internal Hashtable performance and sizing improvements
+* Add heuristics for guessing LXC or Docker from /proc/1/mounts
+* Force elapsed time display to zero if process started in the future
+* Avoid extremely large year values when printing time
+* Fix division by zero when calculating IO rates
+* Fix out of boundary writes in XUtils
+* Fix custom thread name display issue
+* Use AC_CANONICAL_HOST, not AC_CANONICAL_TARGET in configure.ac
+* Support libunwind of LLVM
+
 What's new in version 3.1.2
 
 * Bugfix for crash when storing modified settings at exit

ColorsPanel.c

@@ -68,6 +68,7 @@ static HandlerResult ColorsPanel_eventHandler(Panel* super, int ch) {
 
       this->settings->colorScheme = mark;
       this->settings->changed = true;
+      this->settings->lastUpdate++;
 
       CRT_setColors(mark);
       clear();

ColumnsPanel.c

@@ -138,20 +138,26 @@ static void ColumnsPanel_add(Panel* super, unsigned int key, Hashtable* columns)
    Panel_add(super, (Object*) ListItem_new(name, key));
 }
 
-ColumnsPanel* ColumnsPanel_new(Settings* settings) {
+void ColumnsPanel_fill(ColumnsPanel* this, ScreenSettings* ss, Hashtable* columns) {
+   Panel* super = (Panel*) this;
+   Panel_prune(super);
+   for (const ProcessField* fields = ss->fields; *fields; fields++)
+      ColumnsPanel_add(super, *fields, columns);
+   this->ss = ss;
+}
+
+ColumnsPanel* ColumnsPanel_new(ScreenSettings* ss, Hashtable* columns, bool* changed) {
    ColumnsPanel* this = AllocThis(ColumnsPanel);
    Panel* super = (Panel*) this;
    FunctionBar* fuBar = FunctionBar_new(ColumnsFunctions, NULL, NULL);
    Panel_init(super, 1, 1, 1, 1, Class(ListItem), true, fuBar);
 
-   this->settings = settings;
+   this->ss = ss;
+   this->changed = changed;
    this->moving = false;
    Panel_setHeader(super, "Active Columns");
 
-   Hashtable* dynamicColumns = settings->dynamicColumns;
-   const ProcessField* fields = settings->fields;
-   for (; *fields; fields++)
-      ColumnsPanel_add(super, *fields, dynamicColumns);
+   ColumnsPanel_fill(this, ss, columns);
 
    return this;
 }
@@ -159,14 +165,14 @@ ColumnsPanel* ColumnsPanel_new(Settings* settings) {
 void ColumnsPanel_update(Panel* super) {
    ColumnsPanel* this = (ColumnsPanel*) super;
    int size = Panel_size(super);
-   this->settings->changed = true;
-   this->settings->fields = xRealloc(this->settings->fields, sizeof(ProcessField) * (size + 1));
-   this->settings->flags = 0;
+   *(this->changed) = true;
+   this->ss->fields = xRealloc(this->ss->fields, sizeof(ProcessField) * (size + 1));
+   this->ss->flags = 0;
    for (int i = 0; i < size; i++) {
       int key = ((ListItem*) Panel_get(super, i))->key;
-      this->settings->fields[i] = key;
+      this->ss->fields[i] = key;
       if (key < LAST_PROCESSFIELD)
-         this->settings->flags |= Process_fields[key].flags;
+         this->ss->flags |= Process_fields[key].flags;
    }
-   this->settings->fields[size] = 0;
+   this->ss->fields[size] = 0;
 }

ColumnsPanel.h

@@ -15,14 +15,17 @@ in the source distribution for its full text.
 
 typedef struct ColumnsPanel_ {
    Panel super;
+   ScreenSettings* ss;
+   bool* changed;
 
-   Settings* settings;
    bool moving;
 } ColumnsPanel;
 
 extern const PanelClass ColumnsPanel_class;
 
-ColumnsPanel* ColumnsPanel_new(Settings* settings);
+ColumnsPanel* ColumnsPanel_new(ScreenSettings* ss, Hashtable* columns, bool* changed);
+
+void ColumnsPanel_fill(ColumnsPanel* this, ScreenSettings* ss, Hashtable* columns);
 
 void ColumnsPanel_update(Panel* super);
 

CommandLine.c

@@ -53,15 +53,17 @@ static void printHelpFlag(const char* name) {
           "-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"
+          "-H --highlight-changes[=DELAY]  Highlight new and old processes\n", name);
+#ifdef HAVE_GETMOUSE
+   printf("-M --no-mouse                   Disable the mouse\n");
+#endif
+   printf("-p --pid=PID[,PID,PID...]       Show only the given PIDs\n"
           "   --readonly                   Disable all system and process changing features\n"
           "-s --sort-key=COLUMN            Sort by COLUMN in list view (try --sort-key=help for a list)\n"
           "-t --tree                       Show the tree view (can be combined with -s)\n"
           "-u --user[=USERNAME]            Show only processes for a given user (or $USER)\n"
           "-U --no-unicode                 Do not use unicode but plain ASCII\n"
-          "-V --version                    Print version info\n", name);
+          "-V --version                    Print version info\n");
    Platform_longOptionsUsage(name);
    printf("\n"
           "Long options may be passed with a single dash.\n\n"
@@ -328,7 +330,7 @@ int CommandLine_run(const char* name, int argc, char** argv) {
       settings->enableMouse = false;
 #endif
    if (flags.treeView)
-      settings->treeView = true;
+      settings->ss->treeView = true;
    if (flags.highlightChanges)
       settings->highlightChanges = true;
    if (flags.highlightDelaySecs != -1)
@@ -337,9 +339,9 @@ int CommandLine_run(const char* name, int argc, char** argv) {
       // -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->ss->treeView = false;
       }
-      Settings_setSortKey(settings, flags.sortKey);
+      ScreenSettings_setSortKey(settings->ss, flags.sortKey);
    }
 
    CRT_init(settings, flags.allowUnicode);
@@ -347,7 +349,7 @@ int CommandLine_run(const char* name, int argc, char** argv) {
    MainPanel* panel = MainPanel_new();
    ProcessList_setPanel(pl, (Panel*) panel);
 
-   MainPanel_updateTreeFunctions(panel, settings->treeView);
+   MainPanel_updateLabels(panel, settings->ss->treeView, flags.commFilter);
 
    State state = {
       .settings = settings,
@@ -370,15 +372,10 @@ int CommandLine_run(const char* name, int argc, char** argv) {
    CommandLine_delay(pl, 75);
    ProcessList_scan(pl, false);
 
-   if (settings->allBranchesCollapsed)
+   if (settings->ss->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();
+   ScreenManager_run(scr, NULL, NULL, NULL);
 
    Platform_done();
 

DiskIOMeter.c

@@ -12,6 +12,7 @@ in the source distribution for its full text.
 
 #include "CRT.h"
 #include "Macros.h"
+#include "Meter.h"
 #include "Object.h"
 #include "Platform.h"
 #include "ProcessList.h"
@@ -25,7 +26,7 @@ static const int DiskIOMeter_attributes[] = {
    METER_VALUE_IOWRITE,
 };
 
-static bool hasData = false;
+static MeterRateStatus status = RATESTATUS_INIT;
 static uint32_t cached_read_diff;
 static uint32_t cached_write_diff;
 static double cached_utilisation_diff;
@@ -36,20 +37,27 @@ static void DiskIOMeter_updateValues(Meter* this) {
    static uint64_t cached_last_update;
    uint64_t passedTimeInMs = pl->realtimeMs - cached_last_update;
 
-   /* update only every 500ms */
+   /* update only every 500ms to have a sane span for rate calculation */
    if (passedTimeInMs > 500) {
       static uint64_t cached_read_total;
       static uint64_t cached_write_total;
       static uint64_t cached_msTimeSpend_total;
       uint64_t diff;
 
+      DiskIOData data;
+      if (!Platform_getDiskIO(&data)) {
+         status = RATESTATUS_NODATA;
+      } else if (cached_last_update == 0) {
+         status = RATESTATUS_INIT;
+      } else if (passedTimeInMs > 30000) {
+         status = RATESTATUS_STALE;
+      } else {
+         status = RATESTATUS_DATA;
+      }
+
       cached_last_update = pl->realtimeMs;
 
-      DiskIOData data;
-
-      hasData = Platform_getDiskIO(&data);
-      if (!hasData) {
-         this->values[0] = 0;
+      if (status == RATESTATUS_NODATA) {
          xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "no data");
          return;
       }
@@ -81,10 +89,13 @@ static void DiskIOMeter_updateValues(Meter* this) {
       cached_msTimeSpend_total = data.totalMsTimeSpend;
    }
 
-   if (passedTimeInMs > 30000) {
-      // Triggers for the first initialization and
-      // when there was a long time we did not collect updates
-      hasData = false;
+   if (status == RATESTATUS_INIT) {
+      xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "init");
+      return;
+   }
+   if (status == RATESTATUS_STALE) {
+      xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "stale");
+      return;
    }
 
    this->values[0] = cached_utilisation_diff;
@@ -97,9 +108,18 @@ static void DiskIOMeter_updateValues(Meter* this) {
 }
 
 static void DiskIOMeter_display(ATTR_UNUSED const Object* cast, RichString* out) {
-   if (!hasData) {
+   switch (status) {
+   case RATESTATUS_NODATA:
       RichString_writeAscii(out, CRT_colors[METER_VALUE_ERROR], "no data");
       return;
+   case RATESTATUS_INIT:
+      RichString_writeAscii(out, CRT_colors[METER_VALUE], "initializing...");
+      return;
+   case RATESTATUS_STALE:
+      RichString_writeAscii(out, CRT_colors[METER_VALUE_WARN], "stale data");
+      return;
+   case RATESTATUS_DATA:
+      break;
    }
 
    char buffer[16];

DisplayOptionsPanel.c

@@ -18,6 +18,7 @@ in the source distribution for its full text.
 #include "Object.h"
 #include "OptionItem.h"
 #include "ProvideCurses.h"
+#include "ScreensPanel.h"
 
 
 static const char* const DisplayOptionsFunctions[] = {"      ", "      ", "      ", "      ", "      ", "      ", "      ", "      ", "      ", "Done  ", NULL};
@@ -43,6 +44,8 @@ static HandlerResult DisplayOptionsPanel_eventHandler(Panel* super, int ch) {
    case KEY_RECLICK:
    case ' ':
       switch (OptionItem_kind(selected)) {
+      case OPTION_ITEM_TEXT:
+         break;
       case OPTION_ITEM_CHECK:
          CheckItem_toggle((CheckItem*)selected);
          result = HANDLED;
@@ -69,6 +72,7 @@ static HandlerResult DisplayOptionsPanel_eventHandler(Panel* super, int ch) {
 
    if (result == HANDLED) {
       this->settings->changed = true;
+      this->settings->lastUpdate++;
       Header* header = this->scr->header;
       Header_calculateHeight(header);
       Header_reinit(header);
@@ -97,9 +101,18 @@ DisplayOptionsPanel* DisplayOptionsPanel_new(Settings* settings, ScreenManager*
    this->scr = scr;
 
    Panel_setHeader(super, "Display options");
-   Panel_add(super, (Object*) CheckItem_newByRef("Tree view", &(settings->treeView)));
-   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is always sorted by PID (htop 2 behavior)", &(settings->treeViewAlwaysByPID)));
-   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is collapsed by default", &(settings->allBranchesCollapsed)));
+
+   #define TABMSG "For current screen tab: \0"
+   char tabheader[sizeof(TABMSG) + SCREEN_NAME_LEN + 1] = TABMSG;
+   strncat(tabheader, settings->ss->name, SCREEN_NAME_LEN);
+   Panel_add(super, (Object*) TextItem_new(tabheader));
+   #undef TABMSG
+
+   Panel_add(super, (Object*) CheckItem_newByRef("Tree view", &(settings->ss->treeView)));
+   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is always sorted by PID (htop 2 behavior)", &(settings->ss->treeViewAlwaysByPID)));
+   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is collapsed by default", &(settings->ss->allBranchesCollapsed)));
+   Panel_add(super, (Object*) TextItem_new("Global options:"));
+   Panel_add(super, (Object*) CheckItem_newByRef("Show tabs for screens", &(settings->screenTabs)));
    Panel_add(super, (Object*) CheckItem_newByRef("Shadow other users' processes", &(settings->shadowOtherUsers)));
    Panel_add(super, (Object*) CheckItem_newByRef("Hide kernel threads", &(settings->hideKernelThreads)));
    Panel_add(super, (Object*) CheckItem_newByRef("Hide userland process threads", &(settings->hideUserlandThreads)));

FreqMeter.c

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

FreqMeter.h

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

FunctionBar.c

@@ -88,11 +88,12 @@ void FunctionBar_setLabel(FunctionBar* this, int event, const char* text) {
    }
 }
 
-void FunctionBar_draw(const FunctionBar* this) {
-   FunctionBar_drawExtra(this, NULL, -1, false);
+int FunctionBar_draw(const FunctionBar* this) {
+   return FunctionBar_drawExtra(this, NULL, -1, false);
 }
 
-void FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor) {
+int FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor) {
+   int cursorX = 0;
    attrset(CRT_colors[FUNCTION_BAR]);
    mvhline(LINES - 1, 0, ' ', COLS);
    int x = 0;
@@ -113,18 +114,20 @@ void FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr
       }
       mvaddstr(LINES - 1, x, buffer);
       x += strlen(buffer);
+      cursorX = x;
    }
 
    attrset(CRT_colors[RESET_COLOR]);
 
    if (setCursor) {
-      CRT_cursorX = x;
       curs_set(1);
    } else {
       curs_set(0);
    }
 
    currentLen = x;
+
+   return cursorX;
 }
 
 void FunctionBar_append(const char* buffer, int attr) {

FunctionBar.h

@@ -29,9 +29,9 @@ void FunctionBar_delete(FunctionBar* this);
 
 void FunctionBar_setLabel(FunctionBar* this, int event, const char* text);
 
-void FunctionBar_draw(const FunctionBar* this);
+int FunctionBar_draw(const FunctionBar* this);
 
-void FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor);
+int FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor);
 
 void FunctionBar_append(const char* buffer, int attr);
 

Hashtable.c

@@ -52,7 +52,7 @@ static void Hashtable_dump(const Hashtable* this) {
               i,
               this->buckets[i].key,
               this->buckets[i].probe,
-              this->buckets[i].value ? (const void*)this->buckets[i].value : "(nil)");
+              this->buckets[i].value);
 
       if (this->buckets[i].value)
          items++;
@@ -90,7 +90,7 @@ size_t Hashtable_count(const Hashtable* this) {
 
 /* https://oeis.org/A014234 */
 static const uint64_t OEISprimes[] = {
-   2, 3, 7, 13, 31, 61, 127, 251, 509, 1021, 2039, 4093, 8191,
+   7, 13, 31, 61, 127, 251, 509, 1021, 2039, 4093, 8191,
    16381, 32749, 65521, 131071, 262139, 524287, 1048573,
    2097143, 4194301, 8388593, 16777213, 33554393,
    67108859, 134217689, 268435399, 536870909, 1073741789,
@@ -191,10 +191,14 @@ void Hashtable_setSize(Hashtable* this, size_t size) {
    if (size <= this->items)
       return;
 
+   size_t newSize = nextPrime(size);
+   if (newSize == this->size)
+      return;
+
    HashtableItem* oldBuckets = this->buckets;
    size_t oldSize = this->size;
 
-   this->size = nextPrime(size);
+   this->size = newSize;
    this->buckets = (HashtableItem*) xCalloc(this->size, sizeof(HashtableItem));
    this->items = 0;
 
@@ -282,7 +286,7 @@ void* Hashtable_remove(Hashtable* this, ht_key_t key) {
 
    /* shrink on load-factor < 0.125 */
    if (8 * this->items < this->size)
-      Hashtable_setSize(this, this->size / 2);
+      Hashtable_setSize(this, this->size / 3); /* account for nextPrime rounding up */
 
    return res;
 }

Header.c

@@ -194,7 +194,8 @@ void Header_draw(const Header* this) {
    for (int y = 0; y < height; y++) {
       mvhline(y, 0, ' ', COLS);
    }
-   const int width = COLS - pad;
+   const int numCols = HeaderLayout_getColumns(this->headerLayout);
+   const int width = COLS - 2 * pad - (numCols - 1);
    int x = pad;
    float roundingLoss = 0.0F;
 
@@ -217,6 +218,7 @@ void Header_draw(const Header* this) {
             except for multi column meters. */
          if (meter->mode == TEXT_METERMODE && !Meter_isMultiColumn(meter)) {
             for (int j = 1; j < meter->columnWidthCount; j++) {
+               actualWidth++; /* separator column */
                actualWidth += (float)width * HeaderLayout_layouts[this->headerLayout].widths[col + j] / 100.0F;
             }
          }
@@ -227,6 +229,7 @@ void Header_draw(const Header* this) {
       }
 
       x += floorf(colWidth);
+      x++; /* separator column */
    }
 }
 
@@ -283,6 +286,9 @@ int Header_calculateHeight(Header* this) {
       }
       maxHeight = MAXIMUM(maxHeight, height);
    }
+   if (this->settings->screenTabs) {
+      maxHeight++;
+   }
    this->height = maxHeight;
    this->pad = pad;
    return maxHeight;

HeaderLayout.h

@@ -18,6 +18,7 @@ in the source distribution for its full text.
 
 
 typedef enum HeaderLayout_ {
+   HF_INVALID = -1,
    HF_TWO_50_50,
    HF_TWO_33_67,
    HF_TWO_67_33,

HeaderOptionsPanel.c

@@ -52,6 +52,7 @@ static HandlerResult HeaderOptionsPanel_eventHandler(Panel* super, int ch) {
 
       Header_setLayout(this->scr->header, mark);
       this->settings->changed = true;
+      this->settings->lastUpdate++;
 
       ScreenManager_resize(this->scr);
 

IncSet.c

@@ -85,7 +85,7 @@ static void updateWeakPanel(const IncSet* this, Panel* panel, Vector* lines) {
       const char* incFilter = this->modes[INC_FILTER].buffer;
       for (int i = 0; i < Vector_size(lines); i++) {
          ListItem* line = (ListItem*)Vector_get(lines, i);
-         if (String_contains_i(line->value, incFilter)) {
+         if (String_contains_i(line->value, incFilter, true)) {
             Panel_add(panel, (Object*)line);
             if (selected == (Object*)line) {
                Panel_setSelected(panel, n);
@@ -105,10 +105,10 @@ static void updateWeakPanel(const IncSet* this, Panel* panel, Vector* lines) {
    }
 }
 
-static bool search(const IncMode* mode, Panel* panel, IncMode_GetPanelValue getPanelValue) {
+static bool search(const IncSet* this, Panel* panel, IncMode_GetPanelValue getPanelValue) {
    int size = Panel_size(panel);
    for (int i = 0; i < size; i++) {
-      if (String_contains_i(getPanelValue(panel, i), mode->buffer)) {
+      if (String_contains_i(getPanelValue(panel, i), this->active->buffer, true)) {
          Panel_setSelected(panel, i);
          return true;
       }
@@ -117,6 +117,21 @@ static bool search(const IncMode* mode, Panel* panel, IncMode_GetPanelValue getP
    return false;
 }
 
+void IncSet_activate(IncSet* this, IncType type, Panel* panel) {
+   this->active = &(this->modes[type]);
+   panel->currentBar = this->active->bar;
+   panel->cursorOn = true;
+   this->panel = panel;
+   IncSet_drawBar(this, CRT_colors[FUNCTION_BAR]);
+}
+
+static void IncSet_deactivate(IncSet* this, Panel* panel) {
+   this->active = NULL;
+   Panel_setDefaultBar(panel);
+   panel->cursorOn = false;
+   FunctionBar_draw(this->defaultBar);
+}
+
 static bool IncMode_find(const IncMode* mode, Panel* panel, IncMode_GetPanelValue getPanelValue, int step) {
    int size = Panel_size(panel);
    int here = Panel_getSelectedIndex(panel);
@@ -133,7 +148,7 @@ static bool IncMode_find(const IncMode* mode, Panel* panel, IncMode_GetPanelValu
          return false;
       }
 
-      if (String_contains_i(getPanelValue(panel, i), mode->buffer)) {
+      if (String_contains_i(getPanelValue(panel, i), mode->buffer, true)) {
          Panel_setSelected(panel, i);
          return true;
       }
@@ -194,12 +209,11 @@ bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue
             IncMode_reset(mode);
          }
       }
-      this->active = NULL;
-      Panel_setDefaultBar(panel);
+      IncSet_deactivate(this, panel);
       doSearch = false;
    }
    if (doSearch) {
-      this->found = search(mode, panel, getPanelValue);
+      this->found = search(this, panel, getPanelValue);
    }
    if (filterChanged && lines) {
       updateWeakPanel(this, panel, lines);
@@ -212,14 +226,13 @@ const char* IncSet_getListItemValue(Panel* panel, int i) {
    return l ? l->value : "";
 }
 
-void IncSet_activate(IncSet* this, IncType type, Panel* panel) {
-   this->active = &(this->modes[type]);
-   panel->currentBar = this->active->bar;
-}
-
-void IncSet_drawBar(const IncSet* this) {
+void IncSet_drawBar(const IncSet* this, int attr) {
    if (this->active) {
-      FunctionBar_drawExtra(this->active->bar, this->active->buffer, (this->active->isFilter || this->found) ? -1 : CRT_colors[FAILED_SEARCH], true);
+      if (!this->active->isFilter && !this->found)
+         attr = CRT_colors[FAILED_SEARCH];
+      int cursorX = FunctionBar_drawExtra(this->active->bar, this->active->buffer, attr, true);
+      this->panel->cursorY = LINES - 1;
+      this->panel->cursorX = cursorX;
    } else {
       FunctionBar_draw(this->defaultBar);
    }

IncSet.h

@@ -32,6 +32,7 @@ typedef struct IncMode_ {
 typedef struct IncSet_ {
    IncMode modes[2];
    IncMode* active;
+   Panel* panel;
    FunctionBar* defaultBar;
    bool filtering;
    bool found;
@@ -57,7 +58,7 @@ const char* IncSet_getListItemValue(Panel* panel, int i);
 
 void IncSet_activate(IncSet* this, IncType type, Panel* panel);
 
-void IncSet_drawBar(const IncSet* this);
+void IncSet_drawBar(const IncSet* this, int attr);
 
 int IncSet_synthesizeEvent(IncSet* this, int x);
 

InfoScreen.c

@@ -57,13 +57,13 @@ void InfoScreen_drawTitled(InfoScreen* this, const char* fmt, ...) {
    attrset(CRT_colors[DEFAULT_COLOR]);
    Panel_draw(this->display, true, true, true, false);
 
-   IncSet_drawBar(this->inc);
+   IncSet_drawBar(this->inc, CRT_colors[FUNCTION_BAR]);
 }
 
 void InfoScreen_addLine(InfoScreen* this, const char* line) {
    Vector_add(this->lines, (Object*) ListItem_new(line, 0));
    const char* incFilter = IncSet_filter(this->inc);
-   if (!incFilter || String_contains_i(line, incFilter)) {
+   if (!incFilter || String_contains_i(line, incFilter, true)) {
       Panel_add(this->display, Vector_get(this->lines, Vector_size(this->lines) - 1));
    }
 }
@@ -72,7 +72,7 @@ void InfoScreen_appendLine(InfoScreen* this, const char* line) {
    ListItem* last = (ListItem*)Vector_get(this->lines, Vector_size(this->lines) - 1);
    ListItem_append(last, line);
    const char* incFilter = IncSet_filter(this->inc);
-   if (incFilter && Panel_get(this->display, Panel_size(this->display) - 1) != (Object*)last && String_contains_i(line, incFilter)) {
+   if (incFilter && Panel_get(this->display, Panel_size(this->display) - 1) != (Object*)last && String_contains_i(line, incFilter, true)) {
       Panel_add(this->display, (Object*)last);
    }
 }
@@ -89,15 +89,9 @@ void InfoScreen_run(InfoScreen* this) {
    while (looping) {
 
       Panel_draw(panel, false, true, true, false);
-      IncSet_drawBar(this->inc);
+      IncSet_drawBar(this->inc, CRT_colors[FUNCTION_BAR]);
 
-      if (this->inc->active) {
-         (void) move(LINES - 1, CRT_cursorX);
-      }
-#ifdef HAVE_SET_ESCDELAY
-      set_escdelay(25);
-#endif
-      int ch = getch();
+      int ch = Panel_getCh(panel);
 
       if (ch == ERR) {
          if (As_InfoScreen(this)->onErr) {

ListItem.c

@@ -18,13 +18,13 @@ in the source distribution for its full text.
 #include "XUtils.h"
 
 
-static void ListItem_delete(Object* cast) {
+void ListItem_delete(Object* cast) {
    ListItem* this = (ListItem*)cast;
    free(this->value);
    free(this);
 }
 
-static void ListItem_display(const Object* cast, RichString* out) {
+void ListItem_display(const Object* cast, RichString* out) {
    const ListItem* const this = (const ListItem*)cast;
    assert (this != NULL);
 
@@ -38,11 +38,15 @@ static void ListItem_display(const Object* cast, RichString* out) {
    RichString_appendWide(out, CRT_colors[DEFAULT_COLOR], this->value);
 }
 
-ListItem* ListItem_new(const char* value, int key) {
-   ListItem* this = AllocThis(ListItem);
+void ListItem_init(ListItem* this, const char* value, int key) {
    this->value = xStrdup(value);
    this->key = key;
    this->moving = false;
+}
+
+ListItem* ListItem_new(const char* value, int key) {
+   ListItem* this = AllocThis(ListItem);
+   ListItem_init(this, value, key);
    return this;
 }
 
@@ -55,7 +59,7 @@ void ListItem_append(ListItem* this, const char* text) {
    this->value[newLen] = '\0';
 }
 
-static int ListItem_compare(const void* cast1, const void* cast2) {
+int ListItem_compare(const void* cast1, const void* cast2) {
    const ListItem* obj1 = (const ListItem*) cast1;
    const ListItem* obj2 = (const ListItem*) cast2;
    return strcmp(obj1->value, obj2->value);

ListItem.h

@@ -21,10 +21,18 @@ typedef struct ListItem_ {
 
 extern const ObjectClass ListItem_class;
 
+void ListItem_delete(Object* cast);
+
+void ListItem_display(const Object* cast, RichString* out);
+
+void ListItem_init(ListItem* this, const char* value, int key);
+
 ListItem* ListItem_new(const char* value, int key);
 
 void ListItem_append(ListItem* this, const char* text);
 
+int ListItem_compare(const void* cast1, const void* cast2);
+
 static inline const char* ListItem_getRef(const ListItem* this) {
    return this->value;
 }

MainPanel.c

@@ -24,9 +24,10 @@ in the source distribution for its full text.
 static const char* const MainFunctions[]     = {"Help  ", "Setup ", "Search", "Filter", "Tree  ", "SortBy", "Nice -", "Nice +", "Kill  ", "Quit  ", NULL};
 static const char* const MainFunctions_ro[]  = {"Help  ", "Setup ", "Search", "Filter", "Tree  ", "SortBy", "      ", "      ", "      ", "Quit  ", NULL};
 
-void MainPanel_updateTreeFunctions(MainPanel* this, bool mode) {
+void MainPanel_updateLabels(MainPanel* this, bool list, bool filter) {
    FunctionBar* bar = MainPanel_getFunctionBar(this);
-   FunctionBar_setLabel(bar, KEY_F(5), mode ? "List  " : "Tree  ");
+   FunctionBar_setLabel(bar, KEY_F(5), list   ? "List  " : "Tree  ");
+   FunctionBar_setLabel(bar, KEY_F(4), filter ? "FILTER" : "Filter");
 }
 
 static void MainPanel_pidSearch(MainPanel* this, int ch) {
@@ -71,23 +72,29 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
    if (needReset)
       this->state->hideProcessSelection = false;
 
+   Settings* settings = this->state->settings;
+   ScreenSettings* ss = settings->ss;
+
    if (EVENT_IS_HEADER_CLICK(ch)) {
       int x = EVENT_HEADER_CLICK_GET_X(ch);
       const ProcessList* pl = this->state->pl;
-      Settings* settings = this->state->settings;
       int hx = super->scrollH + x + 1;
       ProcessField field = ProcessList_keyAt(pl, hx);
-      if (settings->treeView && settings->treeViewAlwaysByPID) {
-         settings->treeView = false;
-         settings->direction = 1;
+      if (ss->treeView && ss->treeViewAlwaysByPID) {
+         ss->treeView = false;
+         ss->direction = 1;
          reaction |= Action_setSortKey(settings, field);
-      } else if (field == Settings_getActiveSortKey(settings)) {
-         Settings_invertSortOrder(settings);
+      } else if (field == ScreenSettings_getActiveSortKey(ss)) {
+         ScreenSettings_invertSortOrder(ss);
       } else {
          reaction |= Action_setSortKey(settings, field);
       }
       reaction |= HTOP_RECALCULATE | HTOP_REDRAW_BAR | HTOP_SAVE_SETTINGS;
       result = HANDLED;
+   } else if (EVENT_IS_SCREEN_TAB_CLICK(ch)) {
+      int x = EVENT_SCREEN_TAB_GET_X(ch);
+      reaction |= Action_setScreenTab(settings, x);
+      result = HANDLED;
    } else if (ch != ERR && this->inc->active) {
       bool filterChanged = IncSet_handleKey(this->inc, ch, super, MainPanel_getValue, NULL);
       if (filterChanged) {
@@ -116,7 +123,7 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
    }
 
    if (reaction & HTOP_REDRAW_BAR) {
-      MainPanel_updateTreeFunctions(this, this->state->settings->treeView);
+      MainPanel_updateLabels(this, settings->ss->treeView, this->state->pl->incFilter);
    }
    if (reaction & HTOP_RESIZE) {
       result |= RESIZE;
@@ -182,7 +189,7 @@ static void MainPanel_drawFunctionBar(Panel* super, bool hideFunctionBar) {
    if (hideFunctionBar && !this->inc->active)
       return;
 
-   IncSet_drawBar(this->inc);
+   IncSet_drawBar(this->inc, CRT_colors[FUNCTION_BAR]);
    if (this->state->pauseProcessUpdate) {
       FunctionBar_append("PAUSED", CRT_colors[PAUSED]);
    }

MainPanel.h

@@ -32,7 +32,8 @@ typedef bool(*MainPanel_ForeachProcessFn)(Process*, Arg);
 
 #define MainPanel_getFunctionBar(this_) (((Panel*)(this_))->defaultBar)
 
-void MainPanel_updateTreeFunctions(MainPanel* this, bool mode);
+// update the Label Keys in the MainPanel bar, list: list / tree mode, filter: filter (inc) active / inactive
+void MainPanel_updateLabels(MainPanel* this, bool list, bool filter);
 
 int MainPanel_selectedPid(MainPanel* this);
 

Makefile.am

@@ -74,6 +74,7 @@ myhtopsources = \
 	ProcessLocksScreen.c \
 	RichString.c \
 	ScreenManager.c \
+	ScreensPanel.c \
 	Settings.c \
 	SignalsPanel.c \
 	SwapMeter.c \
@@ -81,6 +82,8 @@ myhtopsources = \
 	TasksMeter.c \
 	TraceScreen.c \
 	UptimeMeter.c \
+	FreqMeter.c \
+	TempMeter.c \
 	UsersTable.c \
 	Vector.c \
 	XUtils.c
@@ -135,6 +138,7 @@ myhtopheaders = \
 	ProvideCurses.h \
 	RichString.h \
 	ScreenManager.h \
+	ScreensPanel.h \
 	Settings.h \
 	SignalsPanel.h \
 	SwapMeter.h \
@@ -142,6 +146,8 @@ myhtopheaders = \
 	TasksMeter.h \
 	TraceScreen.h \
 	UptimeMeter.h \
+	FreqMeter.h \
+	TempMeter.h \
 	UsersTable.h \
 	Vector.h \
 	XUtils.h

Meter.c

@@ -155,7 +155,7 @@ ListItem* Meter_toListItem(const Meter* this, bool moving) {
 static void TextMeterMode_draw(Meter* this, int x, int y, int w) {
    const char* caption = Meter_getCaption(this);
    attrset(CRT_colors[METER_TEXT]);
-   mvaddnstr(y, x, caption, w - 1);
+   mvaddnstr(y, x, caption, w);
    attrset(CRT_colors[RESET_COLOR]);
 
    int captionLen = strlen(caption);
@@ -166,7 +166,7 @@ static void TextMeterMode_draw(Meter* this, int x, int y, int w) {
 
    RichString_begin(out);
    Meter_displayBuffer(this, &out);
-   RichString_printoffnVal(out, y, x, 0, w - 1);
+   RichString_printoffnVal(out, y, x, 0, w);
    RichString_delete(&out);
 }
 
@@ -176,7 +176,6 @@ static const char BarMeterMode_characters[] = "|#*@$%&.";
 
 static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
    const char* caption = Meter_getCaption(this);
-   w -= 2;
    attrset(CRT_colors[METER_TEXT]);
    int captionLen = 3;
    mvaddnstr(y, x, caption, captionLen);
@@ -184,10 +183,11 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
    w -= captionLen;
    attrset(CRT_colors[BAR_BORDER]);
    mvaddch(y, x, '[');
+   w--;
    mvaddch(y, x + MAXIMUM(w, 0), ']');
+   w--;
    attrset(CRT_colors[RESET_COLOR]);
 
-   w--;
    x++;
 
    if (w < 1)
@@ -329,7 +329,7 @@ static void GraphMeterMode_draw(Meter* this, int x, int y, int w) {
       data->values[nValues - 1] = value;
    }
 
-   int i = nValues - (w * 2) + 2, k = 0;
+   int i = nValues - (w * 2), k = 0;
    if (i < 0) {
       k = -i / 2;
       i = 0;

Meter.h

@@ -134,6 +134,13 @@ typedef enum {
    LAST_METERMODE
 } MeterModeId;
 
+typedef enum {
+   RATESTATUS_DATA,
+   RATESTATUS_INIT,
+   RATESTATUS_NODATA,
+   RATESTATUS_STALE
+} MeterRateStatus;
+
 extern const MeterClass Meter_class;
 
 Meter* Meter_new(const ProcessList* pl, unsigned int param, const MeterClass* type);

MetersPanel.c

@@ -184,6 +184,7 @@ static HandlerResult MetersPanel_eventHandler(Panel* super, int ch) {
    if (result == HANDLED || sideMove) {
       Header* header = this->scr->header;
       this->settings->changed = true;
+      this->settings->lastUpdate++;
       Header_calculateHeight(header);
       ScreenManager_resize(this->scr);
    }

NetworkIOMeter.c

@@ -5,6 +5,7 @@
 
 #include "CRT.h"
 #include "Macros.h"
+#include "Meter.h"
 #include "Object.h"
 #include "Platform.h"
 #include "Process.h"
@@ -18,8 +19,7 @@ static const int NetworkIOMeter_attributes[] = {
    METER_VALUE_IOWRITE,
 };
 
-static bool hasData = false;
-
+static MeterRateStatus status = RATESTATUS_INIT;
 static uint32_t cached_rxb_diff;
 static uint32_t cached_rxp_diff;
 static uint32_t cached_txb_diff;
@@ -31,7 +31,7 @@ static void NetworkIOMeter_updateValues(Meter* this) {
 
    uint64_t passedTimeInMs = pl->realtimeMs - cached_last_update;
 
-   /* update only every 500ms */
+   /* update only every 500ms to have a sane span for rate calculation */
    if (passedTimeInMs > 500) {
       static uint64_t cached_rxb_total;
       static uint64_t cached_rxp_total;
@@ -39,11 +39,20 @@ static void NetworkIOMeter_updateValues(Meter* this) {
       static uint64_t cached_txp_total;
       uint64_t diff;
 
+      NetworkIOData data;
+      if (!Platform_getNetworkIO(&data)) {
+         status = RATESTATUS_NODATA;
+      } else if (cached_last_update == 0) {
+         status = RATESTATUS_INIT;
+      } else if (passedTimeInMs > 30000) {
+         status = RATESTATUS_STALE;
+      } else {
+         status = RATESTATUS_DATA;
+      }
+
       cached_last_update = pl->realtimeMs;
 
-      NetworkIOData data;
-      hasData = Platform_getNetworkIO(&data);
-      if (!hasData) {
+      if (status == RATESTATUS_NODATA) {
          xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "no data");
          return;
       }
@@ -85,10 +94,13 @@ static void NetworkIOMeter_updateValues(Meter* this) {
       cached_txp_total = data.packetsTransmitted;
    }
 
-   if (passedTimeInMs > 30000) {
-      // Triggers for the first initialization and
-      // when there was a long time we did not collect updates
-      hasData = false;
+   if (status == RATESTATUS_INIT) {
+      xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "init");
+      return;
+   }
+   if (status == RATESTATUS_STALE) {
+      xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "stale");
+      return;
    }
 
    this->values[0] = cached_rxb_diff;
@@ -104,9 +116,18 @@ static void NetworkIOMeter_updateValues(Meter* this) {
 }
 
 static void NetworkIOMeter_display(ATTR_UNUSED const Object* cast, RichString* out) {
-   if (!hasData) {
+   switch (status) {
+   case RATESTATUS_NODATA:
       RichString_writeAscii(out, CRT_colors[METER_VALUE_ERROR], "no data");
       return;
+   case RATESTATUS_INIT:
+      RichString_writeAscii(out, CRT_colors[METER_VALUE], "initializing...");
+      return;
+   case RATESTATUS_STALE:
+      RichString_writeAscii(out, CRT_colors[METER_VALUE_WARN], "stale data");
+      return;
+   case RATESTATUS_DATA:
+      break;
    }
 
    char buffer[64];

OpenFilesScreen.c

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include "OpenFilesScreen.h"
 
+#include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <stdio.h>
@@ -119,7 +120,9 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
       close(fdnull);
       char buffer[32] = {0};
       xSnprintf(buffer, sizeof(buffer), "%d", pid);
-      execlp("lsof", "lsof", "-P", "-o", "-p", buffer, "-F", NULL);
+      // Use of NULL in variadic functions must have a pointer cast.
+      // The NULL constant is not required by standard to have a pointer type.
+      execlp("lsof", "lsof", "-P", "-o", "-p", buffer, "-F", (char *)NULL);
       exit(127);
    }
    close(fdpair[1]);
@@ -197,7 +200,8 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
    fclose(fd);
 
    int wstatus;
-   if (waitpid(child, &wstatus, 0) == -1) {
+   while (waitpid(child, &wstatus, 0) == -1)
+      if (errno != EINTR) {
          pdata->error = 1;
          return pdata;
       }

OptionItem.c

@@ -25,6 +25,13 @@ static void OptionItem_delete(Object* cast) {
    free(this);
 }
 
+static void TextItem_display(const Object* cast, RichString* out) {
+   const TextItem* this = (const TextItem*)cast;
+   assert (this != NULL);
+
+   RichString_appendWide(out, CRT_colors[HELP_BOLD], this->super.text);
+}
+
 static void CheckItem_display(const Object* cast, RichString* out) {
    const CheckItem* this = (const CheckItem*)cast;
    assert (this != NULL);
@@ -68,6 +75,16 @@ const OptionItemClass OptionItem_class = {
    }
 };
 
+const OptionItemClass TextItem_class = {
+   .super = {
+      .extends = Class(OptionItem),
+      .delete = OptionItem_delete,
+      .display = TextItem_display
+   },
+   .kind = OPTION_ITEM_TEXT
+};
+
+
 const OptionItemClass CheckItem_class = {
    .super = {
       .extends = Class(OptionItem),
@@ -77,6 +94,7 @@ const OptionItemClass CheckItem_class = {
    .kind = OPTION_ITEM_CHECK
 };
 
+
 const OptionItemClass NumberItem_class = {
    .super = {
       .extends = Class(OptionItem),
@@ -86,6 +104,12 @@ const OptionItemClass NumberItem_class = {
    .kind = OPTION_ITEM_NUMBER
 };
 
+TextItem* TextItem_new(const char* text) {
+   TextItem* this = AllocThis(TextItem);
+   this->super.text = xStrdup(text);
+   return this;
+}
+
 CheckItem* CheckItem_newByRef(const char* text, bool* ref) {
    CheckItem* this = AllocThis(CheckItem);
    this->super.text = xStrdup(text);

OptionItem.h

@@ -13,6 +13,7 @@ in the source distribution for its full text.
 
 
 enum OptionItemType {
+   OPTION_ITEM_TEXT,
    OPTION_ITEM_CHECK,
    OPTION_ITEM_NUMBER,
 };
@@ -32,6 +33,12 @@ typedef struct OptionItem_ {
    char* text;
 } OptionItem;
 
+typedef struct TextItem_ {
+   OptionItem super;
+
+   char* text;
+} TextItem;
+
 typedef struct CheckItem_ {
    OptionItem super;
 
@@ -51,9 +58,12 @@ typedef struct NumberItem_ {
 } NumberItem;
 
 extern const OptionItemClass OptionItem_class;
+extern const OptionItemClass TextItem_class;
 extern const OptionItemClass CheckItem_class;
 extern const OptionItemClass NumberItem_class;
 
+TextItem* TextItem_new(const char* text);
+
 CheckItem* CheckItem_newByRef(const char* text, bool* ref);
 CheckItem* CheckItem_newByVal(const char* text, bool value);
 bool CheckItem_get(const CheckItem* this);

Panel.c

@@ -49,6 +49,8 @@ void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type
    this->y = y;
    this->w = w;
    this->h = h;
+   this->cursorX = 0;
+   this->cursorY = 0;
    this->eventHandlerState = NULL;
    this->items = Vector_new(type, owner, DEFAULT_SIZE);
    this->scrollV = 0;
@@ -57,6 +59,7 @@ void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type
    this->oldSelected = 0;
    this->selectedLen = 0;
    this->needsRedraw = true;
+   this->cursorOn = false;
    this->wasFocus = false;
    RichString_beginAllocated(this->header);
    this->defaultBar = fuBar;
@@ -72,6 +75,11 @@ void Panel_done(Panel* this) {
    RichString_delete(&this->header);
 }
 
+void Panel_setCursorToSelection(Panel* this) {
+   this->cursorY = this->y + this->selected - this->scrollV + 1;
+   this->cursorX = this->x + this->selectedLen - this->scrollH;
+}
+
 void Panel_setSelectionColor(Panel* this, ColorElements colorId) {
    this->selectionColorId = colorId;
 }
@@ -330,7 +338,6 @@ void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelect
    this->oldSelected = this->selected;
    this->wasFocus = focus;
    this->needsRedraw = false;
-   move(0, 0);
 }
 
 static int Panel_headerHeight(const Panel* this) {
@@ -485,3 +492,16 @@ HandlerResult Panel_selectByTyping(Panel* this, int ch) {
 
    return IGNORED;
 }
+
+int Panel_getCh(Panel* this) {
+   if (this->cursorOn) {
+      move(this->cursorY, this->cursorX);
+      curs_set(1);
+   } else {
+      curs_set(0);
+   }
+#ifdef HAVE_SET_ESCDELAY
+   set_escdelay(25);
+#endif
+   return getch();
+}

Panel.h

@@ -39,6 +39,10 @@ typedef enum HandlerResult_ {
 #define EVENT_IS_HEADER_CLICK(ev_) ((ev_) >= -10000 && (ev_) <= -9000)
 #define EVENT_HEADER_CLICK_GET_X(ev_) ((ev_) + 10000)
 
+#define EVENT_SCREEN_TAB_CLICK(x_) (-20000 + (x_))
+#define EVENT_IS_SCREEN_TAB_CLICK(ev_) ((ev_) >= -20000 && (ev_) < -10000)
+#define EVENT_SCREEN_TAB_GET_X(ev_) ((ev_) + 20000)
+
 typedef HandlerResult (*Panel_EventHandler)(Panel*, int);
 typedef void (*Panel_DrawFunctionBar)(Panel*, bool);
 typedef void (*Panel_PrintHeader)(Panel*);
@@ -61,6 +65,7 @@ typedef struct PanelClass_ {
 struct Panel_ {
    Object super;
    int x, y, w, h;
+   int cursorX, cursorY;
    Vector* items;
    int selected;
    int oldSelected;
@@ -69,6 +74,7 @@ struct Panel_ {
    int scrollV;
    int scrollH;
    bool needsRedraw;
+   bool cursorOn;
    bool wasFocus;
    FunctionBar* currentBar;
    FunctionBar* defaultBar;
@@ -90,6 +96,8 @@ void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type
 
 void Panel_done(Panel* this);
 
+void Panel_setCursorToSelection(Panel* this);
+
 void Panel_setSelectionColor(Panel* this, ColorElements colorId);
 
 void Panel_setHeader(Panel* this, const char* header);
@@ -130,4 +138,6 @@ bool Panel_onKey(Panel* this, int key);
 
 HandlerResult Panel_selectByTyping(Panel* this, int ch);
 
+int Panel_getCh(Panel* this);
+
 #endif

Process.c

@@ -54,7 +54,7 @@ void Process_setupColumnWidths() {
       return;
    }
 
-   Process_pidDigits = ceil(log10(maxPid));
+   Process_pidDigits = (int)log10(maxPid) + 1;
    assert(Process_pidDigits <= PROCESS_MAX_PID_DIGITS);
 }
 
@@ -64,7 +64,7 @@ void Process_setUidColumnWidth(uid_t maxUid) {
       return;
    }
 
-   Process_uidDigits = ceil(log10(maxUid));
+   Process_uidDigits = (int)log10(maxUid) + 1;
    assert(Process_uidDigits <= PROCESS_MAX_UID_DIGITS);
 }
 
@@ -211,7 +211,12 @@ void Process_printTime(RichString* str, unsigned long long totalHundredths, bool
       int years = days / 365;
       int daysLeft = days - 365 * years;
 
-      if (daysLeft >= 100) {
+      if (years >= 10000000) {
+         RichString_appendnAscii(str, yearColor, "eternity ", 9);
+      } else if (years >= 1000) {
+         len = xSnprintf(buffer, sizeof(buffer), "%7dy ", years);
+         RichString_appendnAscii(str, yearColor, buffer, len);
+      } else if (daysLeft >= 100) {
          len = xSnprintf(buffer, sizeof(buffer), "%3dy", years);
          RichString_appendnAscii(str, yearColor, buffer, len);
          len = xSnprintf(buffer, sizeof(buffer), "%3dd ", daysLeft);
@@ -397,7 +402,7 @@ static inline char* stpcpyWithNewlineConversion(char* dstStr, const char* srcStr
  * This function makes the merged Command string. It also stores the offsets of the
  * basename, comm w.r.t the merged Command string - these offsets will be used by
  * Process_writeCommand() for coloring. The merged Command string is also
- * returned by Process_getCommandStr() for searching, sorting and filtering.
+ * returned by Process_getCommand() for searching, sorting and filtering.
  */
 void Process_makeCommandStr(Process* this) {
    ProcessMergedCommand* mc = &this->mergedCommand;
@@ -409,6 +414,8 @@ void Process_makeCommandStr(Process* this) {
    bool stripExeFromCmdline = settings->stripExeFromCmdline;
    bool showThreadNames = settings->showThreadNames;
 
+   uint64_t settingsStamp = settings->lastUpdate;
+
    /* Nothing to do to (Re)Generate the Command string, if the process is:
     * - a kernel thread, or
     * - a zombie from before being under htop's watch, or
@@ -417,52 +424,27 @@ void Process_makeCommandStr(Process* this) {
       return;
    if (this->state == ZOMBIE && !this->mergedCommand.str)
       return;
-   if (Process_isUserlandThread(this) && settings->showThreadNames && (showThreadNames == mc->prevShowThreadNames))
-      return;
 
    /* this->mergedCommand.str needs updating only if its state or contents changed.
     * Its content is based on the fields cmdline, comm, and exe. */
-   if (
-      mc->prevMergeSet == showMergedCommand &&
-      mc->prevPathSet == showProgramPath &&
-      mc->prevCommSet == searchCommInCmdline &&
-      mc->prevCmdlineSet == stripExeFromCmdline &&
-      mc->prevShowThreadNames == showThreadNames &&
-      !mc->cmdlineChanged &&
-      !mc->commChanged &&
-      !mc->exeChanged
-   ) {
+   if (mc->lastUpdate >= settingsStamp)
       return;
-   }
+
+   mc->lastUpdate = settingsStamp;
 
    /* The field separtor "│" has been chosen such that it will not match any
     * valid string used for searching or filtering */
    const char* SEPARATOR = CRT_treeStr[TREE_STR_VERT];
    const int SEPARATOR_LEN = strlen(SEPARATOR);
 
-   /* Check for any changed fields since we last built this string */
-   if (mc->cmdlineChanged || mc->commChanged || mc->exeChanged) {
-      free(mc->str);
    /* Accommodate the column text, two field separators and terminating NUL */
    size_t maxLen = 2 * SEPARATOR_LEN + 1;
    maxLen += this->cmdline ? strlen(this->cmdline) : strlen("(zombie)");
    maxLen += this->procComm ? strlen(this->procComm) : 0;
    maxLen += this->procExe ? strlen(this->procExe) : 0;
 
+   free(mc->str);
    mc->str = xCalloc(1, maxLen);
-   }
-
-   /* Preserve the settings used in this run */
-   mc->prevMergeSet = showMergedCommand;
-   mc->prevPathSet = showProgramPath;
-   mc->prevCommSet = searchCommInCmdline;
-   mc->prevCmdlineSet = stripExeFromCmdline;
-   mc->prevShowThreadNames = showThreadNames;
-
-   /* Mark everything as unchanged */
-   mc->cmdlineChanged = false;
-   mc->commChanged = false;
-   mc->exeChanged = false;
 
    /* Reset all locations that need extra handling when actually displaying */
    mc->highlightCount = 0;
@@ -516,11 +498,14 @@ void Process_makeCommandStr(Process* this) {
    assert(cmdlineBasenameStart <= (int)strlen(cmdline));
 
    if (!showMergedCommand || !procExe || !procComm) { /* fall back to cmdline */
-      if (showMergedCommand && (!Process_isUserlandThread(this) || showThreadNames) && !procExe && procComm && strlen(procComm)) { /* Prefix column with comm */
+      if ((showMergedCommand || (Process_isUserlandThread(this) && showThreadNames)) && procComm && strlen(procComm)) { /* set column to or prefix it with comm */
          if (strncmp(cmdline + cmdlineBasenameStart, procComm, MINIMUM(TASK_COMM_LEN - 1, strlen(procComm))) != 0) {
             WRITE_HIGHLIGHT(0, strlen(procComm), commAttr, CMDLINE_HIGHLIGHT_FLAG_COMM);
             str = stpcpy(str, procComm);
 
+            if(!showMergedCommand)
+               return;
+
             WRITE_SEPARATOR;
          }
       }
@@ -593,11 +578,15 @@ void Process_makeCommandStr(Process* this) {
    }
 
    if (matchLen) {
+      if (stripExeFromCmdline) {
          /* strip the matched exe prefix */
          cmdline += matchLen;
 
          commStart -= matchLen;
          commEnd -= matchLen;
+      } else {
+         matchLen = 0;
+      }
    }
 
    if (!matchLen || (haveCommField && *cmdline)) {
@@ -729,23 +718,25 @@ void Process_printLeftAlignedField(RichString* str, int attr, const char* conten
    RichString_appendChr(str, attr, ' ', width + 1 - columns);
 }
 
-void Process_printPercentage(float val, char* buffer, int n, int* attr) {
+void Process_printPercentage(float val, char* buffer, int n, uint8_t width, int* attr) {
    if (val >= 0) {
-      if (val < 99.9F) {
-         if (val < 0.05F) {
+      if (val < 0.05F)
          *attr = CRT_colors[PROCESS_SHADOW];
-         }
-         xSnprintf(buffer, n, "%4.1f ", val);
-      } else if (val < 999) {
+      else if (val >= 99.9F)
          *attr = CRT_colors[PROCESS_MEGABYTES];
-         xSnprintf(buffer, n, "%3d. ", (int)val);
-      } else {
-         *attr = CRT_colors[PROCESS_MEGABYTES];
-         xSnprintf(buffer, n, "%4d ", (int)val);
+
+      int precision = 1;
+
+      // Display "val" as "100" for columns like "MEM%".
+      if (width == 4 && val > 99.9F) {
+         precision = 0;
+         val = 100.0F;
       }
+
+      xSnprintf(buffer, n, "%*.*f ", width, precision, val);
    } else {
       *attr = CRT_colors[PROCESS_SHADOW];
-      xSnprintf(buffer, n, " N/A ");
+      xSnprintf(buffer, n, "%*.*s ", width, width, "N/A");
    }
 }
 
@@ -784,7 +775,8 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
          attr = CRT_colors[PROCESS_THREAD];
          baseattr = CRT_colors[PROCESS_THREAD_BASENAME];
       }
-      if (!this->settings->treeView || this->indent == 0) {
+      const ScreenSettings* ss = this->settings->ss;
+      if (!ss->treeView || this->indent == 0) {
          Process_writeCommand(this, attr, baseattr, str);
          return;
       }
@@ -868,7 +860,15 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
       Process_printLeftAlignedField(str, attr, cwd, 25);
       return;
    }
-   case ELAPSED: Process_printTime(str, /* convert to hundreds of a second */ this->processList->realtimeMs / 10 - 100 * this->starttime_ctime, coloring); return;
+   case ELAPSED: {
+      const uint64_t rt = this->processList->realtimeMs;
+      const uint64_t st = this->starttime_ctime * 1000;
+      const uint64_t dt =
+         rt < st ? 0 :
+         rt - st;
+      Process_printTime(str, /* convert to hundreds of a second */ dt / 10, coloring);
+      return;
+   }
    case MAJFLT: Process_printCount(str, this->majflt, coloring); return;
    case MINFLT: Process_printCount(str, this->minflt, coloring); return;
    case M_RESIDENT: Process_printKBytes(str, this->m_resident, coloring); return;
@@ -885,13 +885,13 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
 
       xSnprintf(buffer, n, "%4ld ", this->nlwp);
       break;
-   case PERCENT_CPU: Process_printPercentage(this->percent_cpu, buffer, n, &attr); break;
+   case PERCENT_CPU: Process_printPercentage(this->percent_cpu, buffer, n, Process_fieldWidths[PERCENT_CPU], &attr); break;
    case PERCENT_NORM_CPU: {
       float cpuPercentage = this->percent_cpu / this->processList->activeCPUs;
-      Process_printPercentage(cpuPercentage, buffer, n, &attr);
+      Process_printPercentage(cpuPercentage, buffer, n, Process_fieldWidths[PERCENT_CPU], &attr);
       break;
    }
-   case PERCENT_MEM: Process_printPercentage(this->percent_mem, buffer, n, &attr); break;
+   case PERCENT_MEM: Process_printPercentage(this->percent_mem, buffer, n, 4, &attr); break;
    case PGRP: xSnprintf(buffer, n, "%*d ", Process_pidDigits, this->pgrp); break;
    case PID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, this->pid); break;
    case PPID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, this->ppid); break;
@@ -916,13 +916,13 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
          case BLOCKED:
          case DEFUNCT:
          case STOPPED:
+         case UNINTERRUPTIBLE_WAIT:
          case ZOMBIE:
             attr = CRT_colors[PROCESS_D_STATE];
             break;
 
          case QUEUED:
          case WAITING:
-         case UNINTERRUPTIBLE_WAIT:
          case IDLE:
          case SLEEPING:
             attr = CRT_colors[PROCESS_SHADOW];
@@ -974,7 +974,7 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
 
 void Process_display(const Object* cast, RichString* out) {
    const Process* this = (const Process*) cast;
-   const ProcessField* fields = this->settings->fields;
+   const ProcessField* fields = this->settings->ss->fields;
    for (int i = 0; fields[i]; i++)
       As_Process(this)->writeField(this, out, fields[i]);
 
@@ -1010,7 +1010,7 @@ void Process_done(Process* this) {
 /* This function returns the string displayed in Command column, so that sorting
  * happens on what is displayed - whether comm, full path, basename, etc.. So
  * this follows Process_writeField(COMM) and Process_writeCommand */
-const char* Process_getCommandStr(const Process* this) {
+const char* Process_getCommand(const Process* this) {
    if ((Process_isUserlandThread(this) && this->settings->showThreadNames) || !this->mergedCommand.str) {
       return this->cmdline;
    }
@@ -1026,7 +1026,6 @@ const ProcessClass Process_class = {
       .compare = Process_compare
    },
    .writeField = Process_writeField,
-   .getCommandStr = Process_getCommandStr,
 };
 
 void Process_init(Process* this, const Settings* settings) {
@@ -1080,20 +1079,14 @@ bool Process_sendSignal(Process* this, Arg sgn) {
    return kill(this->pid, sgn.i) == 0;
 }
 
-int Process_pidCompare(const void* v1, const void* v2) {
-   const Process* p1 = (const Process*)v1;
-   const Process* p2 = (const Process*)v2;
-
-   return SPACESHIP_NUMBER(p1->pid, p2->pid);
-}
-
 int Process_compare(const void* v1, const void* v2) {
    const Process* p1 = (const Process*)v1;
    const Process* p2 = (const Process*)v2;
 
    const Settings* settings = p1->settings;
+   const ScreenSettings* ss = settings->ss;
 
-   ProcessField key = Settings_getActiveSortKey(settings);
+   ProcessField key = ScreenSettings_getActiveSortKey(ss);
 
    int result = Process_compareByKey(p1, p2, key);
 
@@ -1101,7 +1094,7 @@ int Process_compare(const void* v1, const void* v2) {
    if (!result)
       return SPACESHIP_NUMBER(p1->pid, p2->pid);
 
-   return (Settings_getActiveDirection(settings) == 1) ? result : -result;
+   return (ScreenSettings_getActiveDirection(ss) == 1) ? result : -result;
 }
 
 int Process_compareByKey_Base(const Process* p1, const Process* p2, ProcessField key) {
@@ -1173,6 +1166,7 @@ int Process_compareByKey_Base(const Process* p1, const Process* p2, ProcessField
    case USER:
       return SPACESHIP_NULLSTR(p1->user, p2->user);
    default:
+      CRT_debug("Process_compareByKey_Base() called with key %d", key);
       assert(0 && "Process_compareByKey_Base: default key reached"); /* should never be reached */
       return SPACESHIP_NUMBER(p1->pid, p2->pid);
    }
@@ -1187,7 +1181,8 @@ void Process_updateComm(Process* this, const char* comm) {
 
    free(this->procComm);
    this->procComm = comm ? xStrdup(comm) : NULL;
-   this->mergedCommand.commChanged = true;
+
+   this->mergedCommand.lastUpdate = 0;
 }
 
 static int skipPotentialPath(const char* cmdline, int end) {
@@ -1227,7 +1222,8 @@ void Process_updateCmdline(Process* this, const char* cmdline, int basenameStart
    this->cmdline = cmdline ? xStrdup(cmdline) : NULL;
    this->cmdlineBasenameStart = (basenameStart || !cmdline) ? basenameStart : skipPotentialPath(cmdline, basenameEnd);
    this->cmdlineBasenameEnd = basenameEnd;
-   this->mergedCommand.cmdlineChanged = true;
+
+   this->mergedCommand.lastUpdate = 0;
 }
 
 void Process_updateExe(Process* this, const char* exe) {
@@ -1246,5 +1242,40 @@ void Process_updateExe(Process* this, const char* exe) {
       this->procExe = NULL;
       this->procExeBasenameOffset = 0;
    }
-   this->mergedCommand.exeChanged = true;
+
+   this->mergedCommand.lastUpdate = 0;
+}
+
+uint8_t Process_fieldWidths[LAST_PROCESSFIELD] = { 0 };
+
+void Process_resetFieldWidths() {
+   for (size_t i = 0; i < LAST_PROCESSFIELD; i++) {
+      if (!Process_fields[i].autoWidth)
+         continue;
+
+      size_t len = strlen(Process_fields[i].title);
+      assert(len <= UINT8_MAX);
+      Process_fieldWidths[i] = (uint8_t)len;
+   }
+}
+
+void Process_updateFieldWidth(ProcessField key, size_t width) {
+   if (width > UINT8_MAX)
+      Process_fieldWidths[key] = UINT8_MAX;
+   else if (width > Process_fieldWidths[key])
+      Process_fieldWidths[key] = (uint8_t)width;
+}
+
+void Process_updateCPUFieldWidths(float percentage) {
+   if (percentage < 99.9F) {
+      Process_updateFieldWidth(PERCENT_CPU, 4);
+      Process_updateFieldWidth(PERCENT_NORM_CPU, 4);
+      return;
+   }
+
+   // Add additional two characters, one for "." and another for precision.
+   uint8_t width = ceil(log10(percentage + 0.1)) + 2;
+
+   Process_updateFieldWidth(PERCENT_CPU, width);
+   Process_updateFieldWidth(PERCENT_NORM_CPU, width);
 }

Process.h

@@ -96,17 +96,10 @@ typedef struct ProcessCmdlineHighlight_ {
  * Process_writeCommand to color the string. str will be NULL for kernel
  * threads and zombies */
 typedef struct ProcessMergedCommand_ {
+   uint64_t lastUpdate;                        /* Marker based on settings->lastUpdate to track when the rendering needs refreshing */
    char* str;                                  /* merged Command string */
    size_t highlightCount;                      /* how many portions of cmdline to highlight */
    ProcessCmdlineHighlight highlights[8];      /* which portions of cmdline to highlight */
-   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_ {
@@ -250,10 +243,10 @@ typedef struct Process_ {
     * Internal state for tree-mode.
     */
    int indent;
-   unsigned int tree_left;
-   unsigned int tree_right;
    unsigned int tree_depth;
-   unsigned int tree_index;
+
+   /* Has no known parent process */
+   bool isRoot;
 
    /*
     * Internal state for merged Command display
@@ -279,6 +272,9 @@ typedef struct ProcessFieldData_ {
 
    /* Whether the column should be sorted in descending order by default */
    bool defaultSortDesc;
+
+   /* Whether the column width is dynamically adjusted (the minimum width is determined by the title length) */
+   bool autoWidth;
 } ProcessFieldData;
 
 // Implemented in platform-specific code:
@@ -286,28 +282,26 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
 int Process_compare(const void* v1, const void* v2);
 void Process_delete(Object* cast);
 extern const ProcessFieldData Process_fields[LAST_PROCESSFIELD];
+extern uint8_t Process_fieldWidths[LAST_PROCESSFIELD];
 #define PROCESS_MIN_PID_DIGITS 5
 #define PROCESS_MAX_PID_DIGITS 19
 #define PROCESS_MIN_UID_DIGITS 5
-#define PROCESS_MAX_UID_DIGITS 19
+#define PROCESS_MAX_UID_DIGITS 20
 extern int Process_pidDigits;
 extern int Process_uidDigits;
 
 typedef Process* (*Process_New)(const struct Settings_*);
 typedef void (*Process_WriteField)(const Process*, RichString*, ProcessField);
 typedef int (*Process_CompareByKey)(const Process*, const Process*, ProcessField);
-typedef const char* (*Process_GetCommandStr)(const Process*);
 
 typedef struct ProcessClass_ {
    const ObjectClass super;
    const Process_WriteField writeField;
    const Process_CompareByKey compareByKey;
-   const Process_GetCommandStr getCommandStr;
 } ProcessClass;
 
 #define As_Process(this_)                              ((const ProcessClass*)((this_)->super.klass))
 
-#define Process_getCommand(this_)                      (As_Process(this_)->getCommandStr ? As_Process(this_)->getCommandStr((const Process*)(this_)) : 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) {
@@ -371,7 +365,7 @@ void Process_fillStarttimeBuffer(Process* this);
 
 void Process_printLeftAlignedField(RichString* str, int attr, const char* content, unsigned int width);
 
-void Process_printPercentage(float val, char* buffer, int n, int* attr);
+void Process_printPercentage(float val, char* buffer, int n, uint8_t width, int* attr);
 
 void Process_display(const Object* cast, RichString* out);
 
@@ -393,21 +387,28 @@ bool Process_changePriorityBy(Process* this, Arg delta);
 
 bool Process_sendSignal(Process* this, Arg sgn);
 
-int Process_pidCompare(const void* v1, const void* v2);
+static inline int Process_pidEqualCompare(const void* v1, const void* v2) {
+   const pid_t p1 = ((const Process*)v1)->pid;
+   const pid_t p2 = ((const Process*)v2)->pid;
+   return p1 != p2; /* return zero when equal */
+}
 
 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);
+const char* Process_getCommand(const Process* this);
 
 void Process_updateComm(Process* this, const char* comm);
 void Process_updateCmdline(Process* this, const char* cmdline, int basenameStart, int basenameEnd);
 void Process_updateExe(Process* this, const char* exe);
 
 /* This function constructs the string that is displayed by
- * Process_writeCommand and also returned by Process_getCommandStr */
+ * Process_writeCommand and also returned by Process_getCommand */
 void Process_makeCommandStr(Process* this);
 
 void Process_writeCommand(const Process* this, int attr, int baseAttr, RichString* str);
 
+void Process_resetFieldWidths(void);
+void Process_updateFieldWidth(ProcessField key, size_t width);
+void Process_updateCPUFieldWidths(float percentage);
+
 #endif

ProcessList.c

@@ -22,11 +22,10 @@ in the source distribution for its full text.
 
 ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* dynamicColumns, Hashtable* pidMatchList, uid_t userId) {
    this->processes = Vector_new(klass, true, DEFAULT_SIZE);
-   this->processes2 = Vector_new(klass, true, DEFAULT_SIZE); // tree-view auxiliary buffer
+   this->displayList = Vector_new(klass, false, DEFAULT_SIZE);
 
    this->processTable = Hashtable_new(200, false);
-   this->displayTreeSet = Hashtable_new(200, false);
-   this->draftingTreeSet = Hashtable_new(200, false);
+   this->needsSort = true;
 
    this->usersTable = usersTable;
    this->pidMatchList = pidMatchList;
@@ -73,11 +72,9 @@ void ProcessList_done(ProcessList* this) {
    }
 #endif
 
-   Hashtable_delete(this->draftingTreeSet);
-   Hashtable_delete(this->displayTreeSet);
    Hashtable_delete(this->processTable);
 
-   Vector_delete(this->processes2);
+   Vector_delete(this->displayList);
    Vector_delete(this->processes);
 }
 
@@ -85,38 +82,48 @@ void ProcessList_setPanel(ProcessList* this, Panel* panel) {
    this->panel = panel;
 }
 
-static const char* alignedDynamicColumnTitle(const ProcessList* this, int key) {
+static const char* alignedDynamicColumnTitle(const ProcessList* this, int key, char* titleBuffer, size_t titleBufferSize) {
    const DynamicColumn* column = Hashtable_get(this->dynamicColumns, key);
    if (column == NULL)
       return "- ";
-   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);
+   xSnprintf(titleBuffer, titleBufferSize, "%*s", width, column->heading);
    return titleBuffer;
 }
 
 static const char* alignedProcessFieldTitle(const ProcessList* this, ProcessField field) {
+   static char titleBuffer[UINT8_MAX + sizeof(" ")];
+   assert(sizeof(titleBuffer) >= DYNAMIC_MAX_COLUMN_WIDTH + sizeof(" "));
+   assert(sizeof(titleBuffer) >= PROCESS_MAX_PID_DIGITS + sizeof(" "));
+   assert(sizeof(titleBuffer) >= PROCESS_MAX_UID_DIGITS + sizeof(" "));
+
    if (field >= LAST_PROCESSFIELD)
-      return alignedDynamicColumnTitle(this, field);
+      return alignedDynamicColumnTitle(this, field, titleBuffer, sizeof(titleBuffer));
 
    const char* title = Process_fields[field].title;
    if (!title)
       return "- ";
 
    if (Process_fields[field].pidColumn) {
-      static char titleBuffer[PROCESS_MAX_PID_DIGITS + sizeof(" ")];
       xSnprintf(titleBuffer, sizeof(titleBuffer), "%*s ", Process_pidDigits, title);
       return titleBuffer;
    }
 
    if (field == ST_UID) {
-      static char titleBuffer[PROCESS_MAX_UID_DIGITS + sizeof(" ")];
       xSnprintf(titleBuffer, sizeof(titleBuffer), "%*s ", Process_uidDigits, title);
       return titleBuffer;
    }
 
+   if (Process_fields[field].autoWidth) {
+      if (field == PERCENT_CPU)
+         xSnprintf(titleBuffer, sizeof(titleBuffer), "%*s ", Process_fieldWidths[field], title);
+      else
+         xSnprintf(titleBuffer, sizeof(titleBuffer), "%-*.*s ", Process_fieldWidths[field], Process_fieldWidths[field], title);
+      return titleBuffer;
+   }
+
    return title;
 }
 
@@ -124,13 +131,14 @@ void ProcessList_printHeader(const ProcessList* this, RichString* header) {
    RichString_rewind(header, RichString_size(header));
 
    const Settings* settings = this->settings;
-   const ProcessField* fields = settings->fields;
+   const ScreenSettings* ss = settings->ss;
+   const ProcessField* fields = ss->fields;
 
-   ProcessField key = Settings_getActiveSortKey(settings);
+   ProcessField key = ScreenSettings_getActiveSortKey(ss);
 
    for (int i = 0; fields[i]; i++) {
       int color;
-      if (settings->treeView && settings->treeViewAlwaysByPID) {
+      if (ss->treeView && ss->treeViewAlwaysByPID) {
          color = CRT_colors[PANEL_HEADER_FOCUS];
       } else if (key == fields[i]) {
          color = CRT_colors[PANEL_SELECTION_FOCUS];
@@ -140,10 +148,11 @@ void ProcessList_printHeader(const ProcessList* this, RichString* header) {
 
       RichString_appendWide(header, color, alignedProcessFieldTitle(this, fields[i]));
       if (key == fields[i] && RichString_getCharVal(*header, RichString_size(header) - 1) == ' ') {
+         bool ascending = ScreenSettings_getActiveDirection(ss) == 1;
          RichString_rewind(header, 1);  // rewind to override space
          RichString_appendnWide(header,
                                 CRT_colors[PANEL_SELECTION_FOCUS],
-                                CRT_treeStr[Settings_getActiveDirection(this->settings) == 1 ? TREE_STR_ASC : TREE_STR_DESC],
+                                CRT_treeStr[ascending ? TREE_STR_ASC : TREE_STR_DESC],
                                 1);
       }
       if (COMM == fields[i] && settings->showMergedCommand) {
@@ -153,7 +162,7 @@ void ProcessList_printHeader(const ProcessList* this, RichString* header) {
 }
 
 void ProcessList_add(ProcessList* this, Process* p) {
-   assert(Vector_indexOf(this->processes, p, Process_pidCompare) == -1);
+   assert(Vector_indexOf(this->processes, p, Process_pidEqualCompare) == -1);
    assert(Hashtable_get(this->processTable, p->pid) == NULL);
    p->processList = this;
 
@@ -163,25 +172,23 @@ void ProcessList_add(ProcessList* this, Process* p) {
    Vector_add(this->processes, p);
    Hashtable_put(this->processTable, p->pid, p);
 
-   assert(Vector_indexOf(this->processes, p, Process_pidCompare) != -1);
+   assert(Vector_indexOf(this->processes, p, Process_pidEqualCompare) != -1);
    assert(Hashtable_get(this->processTable, p->pid) != NULL);
-   assert(Hashtable_count(this->processTable) == Vector_count(this->processes));
+   assert(Vector_countEquals(this->processes, Hashtable_count(this->processTable)));
 }
 
-void ProcessList_remove(ProcessList* this, const Process* p) {
-   assert(Vector_indexOf(this->processes, p, Process_pidCompare) != -1);
-   assert(Hashtable_get(this->processTable, p->pid) != NULL);
-
-   const Process* pp = Hashtable_remove(this->processTable, p->pid);
-   assert(pp == p); (void)pp;
-
+// ProcessList_removeIndex removes Process p from the list's map and soft deletes
+// it from its vector. Vector_compact *must* be called once the caller is done
+// removing items.
+// Should only be called from ProcessList_scan to avoid breaking dying process highlighting.
+static void ProcessList_removeIndex(ProcessList* this, const Process* p, int idx) {
    pid_t pid = p->pid;
-   int idx = Vector_indexOf(this->processes, p, Process_pidCompare);
-   assert(idx != -1);
 
-   if (idx >= 0) {
-      Vector_remove(this->processes, idx);
-   }
+   assert(p == (Process*)Vector_get(this->processes, idx));
+   assert(Hashtable_get(this->processTable, pid) != NULL);
+
+   Hashtable_remove(this->processTable, pid);
+   Vector_softRemove(this->processes, idx);
 
    if (this->following != -1 && this->following == pid) {
       this->following = -1;
@@ -189,316 +196,148 @@ void ProcessList_remove(ProcessList* this, const Process* p) {
    }
 
    assert(Hashtable_get(this->processTable, pid) == NULL);
-   assert(Hashtable_count(this->processTable) == Vector_count(this->processes));
+   assert(Vector_countEquals(this->processes, Hashtable_count(this->processTable)));
 }
 
-// ProcessList_updateTreeSetLayer sorts this->displayTreeSet,
-// relying only on itself.
-//
-// Algorithm
-//
-// The algorithm is based on `depth-first search`,
-// even though `breadth-first search` approach may be more efficient on first glance,
-// after comparison it may be not, as it's not safe to go deeper without first updating the tree structure.
-// If it would be safe that approach would likely bring an advantage in performance.
-//
-// Each call of the function looks for a 'layer'. A 'layer' is a list of processes with the same depth.
-// First it sorts a list. Then it runs the function recursively for each element of the sorted list.
-// After that it updates the settings of processes.
-//
-// It relies on `leftBound` and `rightBound` as an optimization to cut the list size at the time it builds a 'layer'.
-//
-// It uses a temporary Hashtable `draftingTreeSet` because it's not safe to traverse a tree
-// and at the same time make changes in it.
-//
-static void ProcessList_updateTreeSetLayer(ProcessList* this, unsigned int leftBound, unsigned int rightBound, unsigned int deep, unsigned int left, unsigned int right, unsigned int* index, unsigned int* treeIndex, int indent) {
-
-   // It's guaranteed that layer_size is enough space
-   // but most likely it needs less. Specifically on first iteration.
-   int layerSize = (right - left) / 2;
-
-   // check if we reach `children` of `leaves`
-   if (layerSize == 0)
-      return;
-
-   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`).
-   //
-   // This loop also keeps track of left_bound and right_bound of these processes
-   // in order not to lose this information once the list is sorted.
-   //
-   // The variables left_bound and right_bound are different from what the values lhs and rhs represent.
-   // While left_bound and right_bound define a range of processes to look at, the values given by lhs and rhs are indices into an array
-   //
-   // In the below example note how filtering a range of indices i is different from filtering for processes in the bounds left_bound < x < right_bound …
-   //
-   // The nested tree set is sorted by left value, which is guaranteed upon entry/exit of this function.
-   //
-   // i | l | r
-   // 1 | 1 | 9
-   // 2 | 2 | 8
-   // 3 | 4 | 5
-   // 4 | 6 | 7
-   for (unsigned int i = leftBound; i < rightBound; i++) {
-      Process* proc = (Process*)Hashtable_get(this->displayTreeSet, i);
-      assert(proc);
-      if (proc && proc->tree_depth == deep && proc->tree_left > left && proc->tree_right < right) {
-         if (Vector_size(layer) > 0) {
-            Process* previous_process = (Process*)Vector_get(layer, Vector_size(layer) - 1);
-
-            // Make a 'right_bound' of previous_process in a layer the current process's index.
-            //
-            // Use 'tree_depth' as a temporal variable.
-            // It's safe to do as later 'tree_depth' will be renovated.
-            previous_process->tree_depth = proc->tree_index;
-         }
-
-         Vector_add(layer, proc);
-      }
-   }
-
-   // The loop above changes just up to process-1.
-   // So the last process of the layer isn't updated by the above code.
-   //
-   // Thus, if present, set the `rightBound` to the last process on the layer
-   if (Vector_size(layer) > 0) {
-      Process* previous_process = (Process*)Vector_get(layer, Vector_size(layer) - 1);
-      previous_process->tree_depth = rightBound;
-   }
-
-   Vector_quickSort(layer);
-
-   int size = Vector_size(layer);
-   for (int i = 0; i < size; i++) {
-      Process* proc = (Process*)Vector_get(layer, i);
-
-      unsigned int idx = (*index)++;
-      int newLeft = (*treeIndex)++;
-
-      int level = deep == 0 ? 0 : (int)deep - 1;
-      int currentIndent = indent == -1 ? 0 : indent | (1 << level);
-      int nextIndent = indent == -1 ? 0 : ((i < size - 1) ? currentIndent : indent);
-
-      unsigned int newLeftBound = proc->tree_index;
-      unsigned int newRightBound = proc->tree_depth;
-      ProcessList_updateTreeSetLayer(this, newLeftBound, newRightBound, deep + 1, proc->tree_left, proc->tree_right, index, treeIndex, nextIndent);
-
-      int newRight = (*treeIndex)++;
-
-      proc->tree_left = newLeft;
-      proc->tree_right = newRight;
-      proc->tree_index = idx;
-      proc->tree_depth = deep;
-
-      if (indent == -1) {
-         proc->indent = 0;
-      } else if (i == size - 1) {
-         proc->indent = -currentIndent;
-      } else {
-         proc->indent = currentIndent;
-      }
-
-      Hashtable_put(this->draftingTreeSet, proc->tree_index, proc);
-
-      // It's not strictly necessary to do this, but doing so anyways
-      // allows for checking the correctness of the inner workings.
-      Hashtable_remove(this->displayTreeSet, newLeftBound);
-   }
-
-   Vector_delete(layer);
-}
-
-static void ProcessList_updateTreeSet(ProcessList* this) {
-   unsigned int index = 0;
-   unsigned int tree_index = 1;
-
-   const int vsize = Vector_size(this->processes);
-
-   assert(Hashtable_count(this->draftingTreeSet) == 0);
-   assert((int)Hashtable_count(this->displayTreeSet) == vsize);
-
-   ProcessList_updateTreeSetLayer(this, 0, vsize, 0, 0, vsize * 2 + 1, &index, &tree_index, -1);
-
-   Hashtable* tmp = this->draftingTreeSet;
-   this->draftingTreeSet = this->displayTreeSet;
-   this->displayTreeSet = tmp;
-
-   assert(Hashtable_count(this->draftingTreeSet) == 0);
-   assert((int)Hashtable_count(this->displayTreeSet) == vsize);
-}
-
-static void ProcessList_buildTreeBranch(ProcessList* this, pid_t pid, int level, int indent, int direction, bool show, int* node_counter, int* node_index) {
+static void ProcessList_buildTreeBranch(ProcessList* this, pid_t pid, int level, int indent, bool show) {
    // On OpenBSD the kernel thread 'swapper' has pid 0.
    // Do not treat it as root of any tree.
    if (pid == 0)
       return;
 
-   Vector* children = Vector_new(Class(Process), false, DEFAULT_SIZE);
+   // The vector is sorted by parent PID, find the start of the range by bisection
+   int vsize = Vector_size(this->processes);
+   int l = 0;
+   int r = vsize;
+   while (l < r) {
+      int c = (l + r) / 2;
+      Process* process = (Process*)Vector_get(this->processes, c);
+      pid_t ppid = process->isRoot ? 0 : Process_getParentPid(process);
+      if (ppid < pid) {
+         l = c + 1;
+      } else {
+         r = c;
+      }
+   }
+   // Find the end to know the last line for indent handling purposes
+   int lastShown = r;
+   while (r < vsize) {
+      Process* process = (Process*)Vector_get(this->processes, r);
+      if (!Process_isChildOf(process, pid))
+         break;
+      if (process->show)
+         lastShown = r;
+      r++;
+   }
 
-   for (int i = Vector_size(this->processes) - 1; i >= 0; i--) {
+   for (int i = l; i < r; i++) {
       Process* process = (Process*)Vector_get(this->processes, i);
-      if (process->show && Process_isChildOf(process, pid)) {
-         process = (Process*)Vector_take(this->processes, i);
-         Vector_add(children, process);
-      }
-   }
-
-   int size = Vector_size(children);
-   for (int i = 0; i < size; i++) {
-      int index = (*node_index)++;
-      Process* process = (Process*)Vector_get(children, i);
-
-      int lft = (*node_counter)++;
 
       if (!show) {
          process->show = false;
       }
 
-      int s = Vector_size(this->processes2);
-      if (direction == 1) {
-         Vector_add(this->processes2, process);
-      } else {
-         Vector_insert(this->processes2, 0, process);
-      }
-
-      assert(Vector_size(this->processes2) == s + 1); (void)s;
+      Vector_add(this->displayList, process);
 
       int nextIndent = indent | (1 << level);
-      ProcessList_buildTreeBranch(this, process->pid, level + 1, (i < size - 1) ? nextIndent : indent, direction, show ? process->showChildren : false, node_counter, node_index);
-      if (i == size - 1) {
+      ProcessList_buildTreeBranch(this, process->pid, level + 1, (i < lastShown) ? nextIndent : indent, process->show && process->showChildren);
+      if (i == lastShown) {
          process->indent = -nextIndent;
       } else {
          process->indent = nextIndent;
       }
 
-      int rht = (*node_counter)++;
-
-      process->tree_left = lft;
-      process->tree_right = rht;
       process->tree_depth = level + 1;
-      process->tree_index = index;
-      Hashtable_put(this->displayTreeSet, index, process);
    }
-   Vector_delete(children);
 }
 
-static int ProcessList_treeProcessCompare(const void* v1, const void* v2) {
+static int compareProcessByKnownParentThenNatural(const void* v1, const void* v2) {
    const Process* p1 = (const Process*)v1;
    const Process* p2 = (const Process*)v2;
 
-   return SPACESHIP_NUMBER(p1->tree_left, p2->tree_left);
-}
+   int result = SPACESHIP_NUMBER(
+      p1->isRoot ? 0 : Process_getParentPid(p1),
+      p2->isRoot ? 0 : Process_getParentPid(p2)
+   );
 
-static int ProcessList_treeProcessCompareByPID(const void* v1, const void* v2) {
-   const Process* p1 = (const Process*)v1;
-   const Process* p2 = (const Process*)v2;
+   if (result != 0)
+      return result;
 
-   return SPACESHIP_NUMBER(p1->pid, p2->pid);
+   return Process_compare(v1, v2);
 }
 
 // Builds a sorted tree from scratch, without relying on previously gathered information
 static void ProcessList_buildTree(ProcessList* this) {
-   int node_counter = 1;
-   int node_index = 0;
-   int direction = Settings_getActiveDirection(this->settings);
+   Vector_prune(this->displayList);
 
-   // Sort by PID
-   Vector_quickSortCustomCompare(this->processes, ProcessList_treeProcessCompareByPID);
+   // Mark root processes
    int vsize = Vector_size(this->processes);
-
-   // Find all processes whose parent is not visible
-   int size;
-   while ((size = Vector_size(this->processes))) {
-      int i;
-      for (i = 0; i < size; i++) {
+   for (int i = 0; i < vsize; i++) {
       Process* process = (Process*)Vector_get(this->processes, i);
-
-         // Immediately consume processes hidden from view
-         if (!process->show) {
-            process = (Process*)Vector_take(this->processes, i);
-            process->indent = 0;
-            process->tree_depth = 0;
-            process->tree_left = node_counter++;
-            process->tree_index = node_index++;
-            Vector_add(this->processes2, process);
-            ProcessList_buildTreeBranch(this, process->pid, 0, 0, direction, false, &node_counter, &node_index);
-            process->tree_right = node_counter++;
-            Hashtable_put(this->displayTreeSet, process->tree_index, process);
-            break;
-         }
-
       pid_t ppid = Process_getParentPid(process);
-
-         // Bisect the process vector to find parent
-         int l = 0;
-         int r = size;
+      process->isRoot = false;
 
       // If PID corresponds with PPID (e.g. "kernel_task" (PID:0, PPID:0)
-         // on Mac OS X 10.11.6) cancel bisecting and regard this process as
-         // root.
-         if (process->pid == ppid)
-            r = 0;
+      // on Mac OS X 10.11.6) regard this process as root.
+      if (process->pid == ppid) {
+         process->isRoot = true;
+         continue;
+      }
 
       // On Linux both the init process (pid 1) and the root UMH kernel thread (pid 2)
       // use a ppid of 0. As that PID can't exist, we can skip searching for it.
-         if (!ppid)
-            r = 0;
+      if (!ppid) {
+         process->isRoot = true;
+         continue;
+      }
 
-         while (l < r) {
-            int c = (l + r) / 2;
-            pid_t pid = ((Process*)Vector_get(this->processes, c))->pid;
-            if (ppid == pid) {
-               break;
-            } else if (ppid < pid) {
-               r = c;
-            } else {
-               l = c + 1;
-            }
+      // We don't know about its parent for whatever reason
+      if (ProcessList_findProcess(this, ppid) == NULL)
+         process->isRoot = true;
    }
 
+   // Sort by known parent PID (roots first), then PID
+   Vector_quickSortCustomCompare(this->processes, compareProcessByKnownParentThenNatural);
+
+   // Find all processes whose parent is not visible
+   for (int i = 0; i < vsize; i++) {
+      Process* process = (Process*)Vector_get(this->processes, i);
+
       // If parent not found, then construct the tree with this node as root
-         if (l >= r) {
-            process = (Process*)Vector_take(this->processes, i);
+      if (process->isRoot) {
+         process = (Process*)Vector_get(this->processes, i);
          process->indent = 0;
          process->tree_depth = 0;
-            process->tree_left = node_counter++;
-            process->tree_index = node_index++;
-            Vector_add(this->processes2, process);
-            Hashtable_put(this->displayTreeSet, process->tree_index, process);
-            ProcessList_buildTreeBranch(this, process->pid, 0, 0, direction, process->showChildren, &node_counter, &node_index);
-            process->tree_right = node_counter++;
-            break;
+         Vector_add(this->displayList, process);
+         ProcessList_buildTreeBranch(this, process->pid, 0, 0, process->showChildren);
+         continue;
       }
    }
 
-      // There should be no loop in the process tree
-      assert(i < size);
-   }
-
-   // Swap listings around
-   Vector* t = this->processes;
-   this->processes = this->processes2;
-   this->processes2 = t;
+   this->needsSort = false;
 
    // Check consistency of the built structures
-   assert(Vector_size(this->processes) == vsize); (void)vsize;
-   assert(Vector_size(this->processes2) == 0);
+   assert(Vector_size(this->displayList) == vsize); (void)vsize;
 }
 
-void ProcessList_sort(ProcessList* this) {
-   if (this->settings->treeView) {
-      ProcessList_updateTreeSet(this);
-      Vector_quickSortCustomCompare(this->processes, ProcessList_treeProcessCompare);
+void ProcessList_updateDisplayList(ProcessList* this) {
+   if (this->settings->ss->treeView) {
+      if (this->needsSort)
+         ProcessList_buildTree(this);
    } else {
+      if (this->needsSort)
          Vector_insertionSort(this->processes);
+      Vector_prune(this->displayList);
+      int size = Vector_size(this->processes);
+      for (int i = 0; i < size; i++)
+         Vector_add(this->displayList, Vector_get(this->processes, i));
    }
+   this->needsSort = false;
 }
 
 ProcessField ProcessList_keyAt(const ProcessList* this, int at) {
    int x = 0;
-   const ProcessField* fields = this->settings->fields;
+   const ProcessField* fields = this->settings->ss->fields;
    ProcessField field;
    for (int i = 0; (field = fields[i]); i++) {
       int len = strlen(alignedProcessFieldTitle(this, field));
@@ -518,7 +357,10 @@ void ProcessList_expandTree(ProcessList* this) {
    }
 }
 
+// Called on collapse-all toggle and on startup, possibly in non-tree mode
 void ProcessList_collapseAllBranches(ProcessList* this) {
+   ProcessList_buildTree(this); // Update `tree_depth` fields of the processes
+   this->needsSort = true; // ProcessList is sorted by parent now, force new sort
    int size = Vector_size(this->processes);
    for (int i = 0; i < size; i++) {
       Process* process = (Process*) Vector_get(this->processes, i);
@@ -529,6 +371,8 @@ void ProcessList_collapseAllBranches(ProcessList* this) {
 }
 
 void ProcessList_rebuildPanel(ProcessList* this) {
+   ProcessList_updateDisplayList(this);
+
    const char* incFilter = this->incFilter;
 
    const int currPos = Panel_getSelectedIndex(this->panel);
@@ -546,16 +390,16 @@ void ProcessList_rebuildPanel(ProcessList* this) {
       }
    }
 
-   const int processCount = Vector_size(this->processes);
+   const int processCount = Vector_size(this->displayList);
    int idx = 0;
    bool foundFollowed = false;
 
    for (int i = 0; i < processCount; i++) {
-      Process* p = (Process*) Vector_get(this->processes, i);
+      Process* p = (Process*) Vector_get(this->displayList, i);
 
       if ( (!p->show)
          || (this->userId != (uid_t) -1 && (p->st_uid != this->userId))
-         || (incFilter && !(String_contains_i(Process_getCommand(p), incFilter)))
+         || (incFilter && !(String_contains_i(Process_getCommand(p), incFilter, true)))
          || (this->pidMatchList && !Hashtable_get(this->pidMatchList, p->tgid)) )
          continue;
 
@@ -590,7 +434,7 @@ Process* ProcessList_getProcess(ProcessList* this, pid_t pid, bool* preExisting,
    Process* proc = (Process*) Hashtable_get(this->processTable, pid);
    *preExisting = proc != NULL;
    if (proc) {
-      assert(Vector_indexOf(this->processes, proc, Process_pidCompare) != -1);
+      assert(Vector_indexOf(this->processes, proc, Process_pidEqualCompare) != -1);
       assert(proc->pid == pid);
    } else {
       proc = constructor(this->settings);
@@ -620,6 +464,7 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
    this->kernelThreads = 0;
    this->runningTasks = 0;
 
+   Process_resetFieldWidths();
 
    // set scan timestamp
    static bool firstScanDone = false;
@@ -644,7 +489,7 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
       if (p->tombStampMs > 0) {
          // remove tombed process
          if (this->monotonicMs >= p->tombStampMs) {
-            ProcessList_remove(this, p);
+            ProcessList_removeIndex(this, p, i);
          }
       } else if (p->updated == false) {
          // process no longer exists
@@ -653,21 +498,14 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
             p->tombStampMs = this->monotonicMs + 1000 * this->settings->highlightDelaySecs;
          } else {
             // immediately remove
-            ProcessList_remove(this, p);
+            ProcessList_removeIndex(this, p, i);
          }
       }
    }
 
+   // Compact the processes vector in case of any deletions
+   Vector_compact(this->processes);
+
    // Set UID column width based on max UID.
    Process_setUidColumnWidth(maxUid);
-
-   if (this->settings->treeView) {
-      // Clear out the hashtable to avoid any left-over processes from previous build
-      //
-      // The sorting algorithm relies on the fact that
-      // len(this->displayTreeSet) == len(this->processes)
-      Hashtable_clear(this->displayTreeSet);
-
-      ProcessList_buildTree(this);
-   }
 }

ProcessList.h

@@ -43,13 +43,13 @@ typedef unsigned long long int memory_t;
 typedef struct ProcessList_ {
    const Settings* settings;
 
-   Vector* processes;
-   Vector* processes2;
-   Hashtable* processTable;
+   Vector* processes;         /* all known processes; sort order can vary and differ from display order */
+   Vector* displayList;       /* process tree flattened in display order (borrowed);
+                                 updated in ProcessList_updateDisplayList when rebuilding panel */
+   Hashtable* processTable;   /* fast known process lookup by PID */
    UsersTable* usersTable;
 
-   Hashtable* displayTreeSet;
-   Hashtable* draftingTreeSet;
+   bool needsSort;
 
    Hashtable* dynamicMeters;  /* runtime-discovered meters */
    Hashtable* dynamicColumns; /* runtime-discovered Columns */
@@ -106,9 +106,7 @@ void ProcessList_printHeader(const ProcessList* this, RichString* header);
 
 void ProcessList_add(ProcessList* this, Process* p);
 
-void ProcessList_remove(ProcessList* this, const Process* p);
-
-void ProcessList_sort(ProcessList* this);
+void ProcessList_updateDisplayList(ProcessList* this);
 
 ProcessField ProcessList_keyAt(const ProcessList* this, int at);
 

README

@@ -8,7 +8,22 @@
 [![Packaging status](https://repology.org/badge/tiny-repos/htop.svg)](https://repology.org/project/htop/versions)
 [![License: GPL v2+](https://img.shields.io/badge/License-GPL%20v2+-blue.svg)](COPYING?raw=true)
 
-![Screenshot of htop](docs/images/screenshot.png?raw=true)
+![Screenshot of htop](https://i.imgur.com/dCSsvSv.png)
+
+## **Warning!**
+
+This fork was created for personal use; correct operation is not guaranteed.
+
+<details>
+  <summary>Tested on</summary>
+
+- Manjaro ARM Minimal (Raspberry Pi 4)
+- Debian 11 (Raspberry Pi 4)
+- Ubuntu Server 22.04 (Raspberry Pi 4)
+- Raspbian 64bit (Raspberry Pi 3B+)
+- Arch Linux (x86 PC), used for the screenshot above
+
+</details>
 
 ## Introduction
 
@@ -30,45 +45,66 @@ For more information and details visit [htop.dev](https://htop.dev).
 ## Build instructions
 
 ### Prerequisite
+
 List of build-time dependencies:
-  * standard GNU autotools-based C toolchain
+
+- standard GNU autotools-based C toolchain
   - C99 compliant compiler
   - `autoconf`
   - `autotools`
-  * `ncurses`
+- `ncurses`
 
 **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.
+>
+>- 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).
 
 List of additional build-time dependencies (based on feature flags):
-*  `sensors`
-*  `hwloc`
-*  `libcap` (v2.21 or later)
-*  `libnl-3`
+
+- `sensors`
+- `hwloc`
+- `libcap` (v2.21 or later)
+- `libnl-3`
 
 Install these and other required packages for C development from your package manager.
 
 **Debian/Ubuntu**
+
 ~~~ shell
 sudo apt install libncursesw5-dev autotools-dev autoconf build-essential
 ~~~
 
 **Fedora/RHEL**
+
 ~~~ shell
 sudo dnf install ncurses-devel automake autoconf gcc
 ~~~
 
-### Compile from source:
+**Archlinux/Manjaro**
+
+~~~ shell
+sudo pacman -S ncurses automake autoconf gcc
+~~~
+
+**macOS**
+
+~~~ shell
+brew install ncurses automake autoconf gcc
+~~~
+
+### Compile from source
+
 To compile from source, download 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
 ~~~
 
 ### 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
@@ -77,80 +113,85 @@ To install on the local system run `make install`. By default `make install` ins
 
 #### Generic
 
-  * `--enable-unicode`:
+- `--enable-unicode`:
     enable Unicode support
   - dependency: *libncursesw*
   - default: *yes*
-  * `--enable-affinity`:
+- `--enable-affinity`:
     enable `sched_setaffinity(2)` and `sched_getaffinity(2)` for affinity support; conflicts with hwloc
   - default: *check*
-  * `--enable-hwloc`:
+- `--enable-hwloc`:
     enable hwloc support for CPU affinity; disables affinity support
   - dependency: *libhwloc*
   - default: *no*
-  * `--enable-static`:
+- `--enable-static`:
     build a static htop binary; hwloc and delay accounting are not supported
   - default: *no*
-  * `--enable-debug`:
+- `--enable-debug`:
     Enable asserts and internal sanity checks; implies a performance penalty
   - default: *no*
 
 #### Performance Co-Pilot
 
-  * `--enable-pcp`:
+- `--enable-pcp`:
     enable Performance Co-Pilot support via a new pcp-htop utility
   - dependency: *libpcp*
   - default: *no*
 
 #### Linux
 
-  * `--enable-sensors`:
+- `--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-capabilities`:
     enable Linux capabilities support
   - dependency: *libcap*
   - default: *check*
-  * `--with-proc`:
+- `--with-proc`:
     location of a Linux-compatible proc filesystem
   - default: */proc*
-  * `--enable-openvz`:
+- `--enable-openvz`:
     enable OpenVZ support
   - default: *no*
-  * `--enable-vserver`:
+- `--enable-vserver`:
     enable VServer support
   - default: *no*
-  * `--enable-ancient-vserver`:
+- `--enable-ancient-vserver`:
     enable ancient VServer support (implies `--enable-vserver`)
   - default: *no*
-  * `--enable-delayacct`:
+- `--enable-delayacct`:
     enable Linux delay accounting support
   - dependencies: *pkg-config*(build-time), *libnl-3* and *libnl-genl-3*
   - default: *check*
 
+## Runtime dependencies
 
-## 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:
+- `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:
 
 #### Linux
-* `libdl`, if not building a static binary, is always required when support for optional dependencies (i.e. `libsensors`, `libsystemd`) is present.
-* `libcap`, user-space interfaces to POSIX 1003.1e capabilities, 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`.
-* `libsystemd` is optional when `--enable-static` was not used to configure `htop`. If building statically and `libsystemd` is not found by `configure`, support for the systemd meter is disabled entirely.
+
+- `libdl`, if not building a static binary, is always required when support for optional dependencies (i.e. `libsensors`, `libsystemd`) is present.
+- `libcap`, user-space interfaces to POSIX 1003.1e capabilities, 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`.
+- `libsystemd` is optional when `--enable-static` was not used to configure `htop`. 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 libraries as `htop` runs.
 
 #### BSD
+
 On most BSD systems `kvm` is a requirement to read 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 help menu (**F1** or **h** inside `htop`) for a list of supported key commands.
 
 ## Support

ScreenManager.c

@@ -16,6 +16,7 @@ in the source distribution for its full text.
 
 #include "CRT.h"
 #include "FunctionBar.h"
+#include "Macros.h"
 #include "Object.h"
 #include "Platform.h"
 #include "ProcessList.h"
@@ -49,27 +50,43 @@ inline int ScreenManager_size(const ScreenManager* this) {
 }
 
 void ScreenManager_add(ScreenManager* this, Panel* item, int size) {
+   ScreenManager_insert(this, item, size, Vector_size(this->panels));
+}
+
+void ScreenManager_insert(ScreenManager* this, Panel* item, int size, int idx) {
    int lastX = 0;
-   if (this->panelCount > 0) {
-      const Panel* last = (const Panel*) Vector_get(this->panels, this->panelCount - 1);
+   if (idx > 0) {
+      const Panel* last = (const Panel*) Vector_get(this->panels, idx - 1);
       lastX = last->x + last->w + 1;
    }
    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);
+   if (size <= 0) {
+      size = COLS - this->x1 + this->x2 - lastX;
    }
+   Panel_resize(item, size, height);
    Panel_move(item, lastX, this->y1 + (this->header ? this->header->height : 0));
-   Vector_add(this->panels, item);
+   if (idx < this->panelCount) {
+      for (int i =  idx + 1; i <= this->panelCount; i++) {
+         Panel* p = (Panel*) Vector_get(this->panels, i);
+         Panel_move(p, p->x + size, p->y);
+      }
+   }
+   Vector_insert(this->panels, idx, item);
    item->needsRedraw = true;
    this->panelCount++;
 }
 
 Panel* ScreenManager_remove(ScreenManager* this, int idx) {
    assert(this->panelCount > idx);
+   int w = ((Panel*) Vector_get(this->panels, idx))->w;
    Panel* panel = (Panel*) Vector_remove(this->panels, idx);
    this->panelCount--;
+   if (idx < this->panelCount) {
+      for (int i = idx; i < this->panelCount; i++) {
+         Panel* p = (Panel*) Vector_get(this->panels, i);
+         Panel_move(p, p->x - w, p->y);
+      }
+   }
    return panel;
 }
 
@@ -104,14 +121,14 @@ static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTi
    if (*rescan) {
       *oldTime = newTime;
       int oldUidDigits = Process_uidDigits;
+      if (!this->state->pauseProcessUpdate && (*sortTimeout == 0 || this->settings->ss->treeView)) {
+         pl->needsSort = true;
+         *sortTimeout = 1;
+      }
       // 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;
-      }
       // force redraw if the number of UID digits was changed
       if (Process_uidDigits != oldUidDigits) {
          *force_redraw = true;
@@ -125,7 +142,53 @@ static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTi
    *rescan = false;
 }
 
+static inline bool drawTab(int* y, int* x, int l, const char* name, bool cur) {
+   attrset(CRT_colors[cur ? SCREENS_CUR_BORDER : SCREENS_OTH_BORDER]);
+   mvaddch(*y, *x, '[');
+   (*x)++;
+   if (*x >= l)
+      return false;
+   int nameLen = strlen(name);
+   int n = MINIMUM(l - *x, nameLen);
+   attrset(CRT_colors[cur ? SCREENS_CUR_TEXT : SCREENS_OTH_TEXT]);
+   mvaddnstr(*y, *x, name, n);
+   *x += n;
+   if (*x >= l)
+      return false;
+   attrset(CRT_colors[cur ? SCREENS_CUR_BORDER : SCREENS_OTH_BORDER]);
+   mvaddch(*y, *x, ']');
+   *x += 2;
+   if (*x >= l)
+      return false;
+   return true;
+}
+
+static void ScreenManager_drawScreenTabs(ScreenManager* this) {
+   ScreenSettings** screens = this->settings->screens;
+   int cur = this->settings->ssIndex;
+   int l = COLS;
+   Panel* panel = (Panel*) Vector_get(this->panels, 0);
+   int y = panel->y - 1;
+   int x = 2;
+
+   if (this->name) {
+      drawTab(&y, &x, l, this->name, true);
+      return;
+   }
+
+   for (int s = 0; screens[s]; s++) {
+      bool ok = drawTab(&y, &x, l, screens[s]->name, s == cur);
+      if (!ok) {
+         break;
+      }
+   }
+   attrset(CRT_colors[RESET_COLOR]);
+}
+
 static void ScreenManager_drawPanels(ScreenManager* this, int focus, bool force_redraw) {
+   if (this->settings->screenTabs) {
+      ScreenManager_drawScreenTabs(this);
+   }
    const int nPanels = this->panelCount;
    for (int i = 0; i < nPanels; i++) {
       Panel* panel = (Panel*) Vector_get(this->panels, i);
@@ -138,7 +201,7 @@ static void ScreenManager_drawPanels(ScreenManager* this, int focus, bool force_
    }
 }
 
-void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
+void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey, const char* name) {
    bool quit = false;
    int focus = 0;
 
@@ -156,6 +219,8 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
    int sortTimeout = 0;
    int resetSortTimeout = 5;
 
+   this->name = name;
+
    while (!quit) {
       if (this->header) {
          checkRecalculation(this, &oldTime, &sortTimeout, &redraw, &rescan, &timedOut, &force_redraw);
@@ -167,10 +232,7 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
       }
 
       int prevCh = ch;
-#ifdef HAVE_SET_ESCDELAY
-      set_escdelay(25);
-#endif
-      ch = getch();
+      ch = Panel_getCh(panelFocus);
 
       HandlerResult result = IGNORED;
 #ifdef HAVE_GETMOUSE
@@ -189,6 +251,9 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
                         if (mevent.y == panel->y) {
                            ch = EVENT_HEADER_CLICK(mevent.x - panel->x);
                            break;
+                        } else if (this->settings->screenTabs && mevent.y == panel->y - 1) {
+                           ch = EVENT_SCREEN_TAB_CLICK(mevent.x);
+                           break;
                         } else if (mevent.y > panel->y && mevent.y <= panel->y + panel->h) {
                            ch = KEY_MOUSE;
                            if (panel == panelFocus || this->allowFocusChange) {

ScreenManager.h

@@ -22,6 +22,7 @@ typedef struct ScreenManager_ {
    int x2;
    int y2;
    Vector* panels;
+   const char* name;
    int panelCount;
    Header* header;
    const Settings* settings;
@@ -37,10 +38,12 @@ int ScreenManager_size(const ScreenManager* this);
 
 void ScreenManager_add(ScreenManager* this, Panel* item, int size);
 
+void ScreenManager_insert(ScreenManager* this, Panel* item, int size, int idx);
+
 Panel* ScreenManager_remove(ScreenManager* this, int idx);
 
 void ScreenManager_resize(ScreenManager* this);
 
-void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey);
+void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey, const char* name);
 
 #endif

ScreensPanel.c

@@ -0,0 +1,328 @@
+/*
+htop - ScreensPanel.c
+(C) 2004-2011 Hisham H. Muhammad
+(C) 2020-2022 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "ScreensPanel.h"
+
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+
+#include "CRT.h"
+#include "FunctionBar.h"
+#include "Hashtable.h"
+#include "ProvideCurses.h"
+#include "Settings.h"
+#include "XUtils.h"
+
+
+static void ScreenListItem_delete(Object* cast) {
+   ScreenListItem* this = (ScreenListItem*)cast;
+   if (this->ss) {
+      ScreenSettings_delete(this->ss);
+   }
+   ListItem_delete(cast);
+}
+
+ObjectClass ScreenListItem_class = {
+   .extends = Class(ListItem),
+   .display = ListItem_display,
+   .delete = ScreenListItem_delete,
+   .compare = ListItem_compare
+};
+
+ScreenListItem* ScreenListItem_new(const char* value, ScreenSettings* ss) {
+   ScreenListItem* this = AllocThis(ScreenListItem);
+   ListItem_init((ListItem*)this, value, 0);
+   this->ss = ss;
+   return this;
+}
+
+static const char* const ScreensFunctions[] = {"      ", "Rename", "      ", "      ", "New   ", "      ", "MoveUp", "MoveDn", "Remove", "Done  ", NULL};
+
+static void ScreensPanel_delete(Object* object) {
+   Panel* super = (Panel*) object;
+   ScreensPanel* this = (ScreensPanel*) object;
+
+   /* do not delete screen settings still in use */
+   int n = Panel_size(super);
+   for (int i = 0; i < n; i++) {
+      ScreenListItem* item = (ScreenListItem*) Panel_get(super, i);
+      item->ss = NULL;
+   }
+
+   Panel_done(super);
+   free(this);
+}
+
+static HandlerResult ScreensPanel_eventHandlerRenaming(Panel* super, int ch) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   if (ch >= 32 && ch < 127 && ch != '=') {
+      if (this->cursor < SCREEN_NAME_LEN - 1) {
+         this->buffer[this->cursor] = (char)ch;
+         this->cursor++;
+         super->selectedLen = strlen(this->buffer);
+         Panel_setCursorToSelection(super);
+      }
+   } else {
+      switch(ch) {
+         case 127:
+         case KEY_BACKSPACE:
+         {
+            if (this->cursor > 0) {
+               this->cursor--;
+               this->buffer[this->cursor] = '\0';
+               super->selectedLen = strlen(this->buffer);
+               Panel_setCursorToSelection(super);
+            }
+            break;
+         }
+         case '\n':
+         case '\r':
+         case KEY_ENTER:
+         {
+            ListItem* item = (ListItem*) Panel_getSelected(super);
+            if (!item)
+               break;
+            free(this->saved);
+            item->value = xStrdup(this->buffer);
+            this->renaming = false;
+            super->cursorOn = false;
+            Panel_setSelectionColor(super, PANEL_SELECTION_FOCUS);
+            ScreensPanel_update(super);
+            break;
+         }
+         case 27: // Esc
+         {
+            ListItem* item = (ListItem*) Panel_getSelected(super);
+            if (!item)
+               break;
+            item->value = this->saved;
+            this->renaming = false;
+            super->cursorOn = false;
+            Panel_setSelectionColor(super, PANEL_SELECTION_FOCUS);
+            break;
+         }
+      }
+   }
+   return HANDLED;
+}
+
+static void startRenaming(Panel* super) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   ListItem* item = (ListItem*) Panel_getSelected(super);
+   if (item == NULL)
+      return;
+   this->renaming = true;
+   super->cursorOn = true;
+   char* name = item->value;
+   this->saved = name;
+   strncpy(this->buffer, name, SCREEN_NAME_LEN);
+   this->buffer[SCREEN_NAME_LEN] = '\0';
+   this->cursor = strlen(this->buffer);
+   item->value = this->buffer;
+   Panel_setSelectionColor(super, PANEL_EDIT);
+   super->selectedLen = strlen(this->buffer);
+   Panel_setCursorToSelection(super);
+}
+
+static void rebuildSettingsArray(Panel* super) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   int n = Panel_size(super);
+   free(this->settings->screens);
+   this->settings->screens = xMallocArray(n + 1, sizeof(ScreenSettings*));
+   this->settings->screens[n] = NULL;
+   for (int i = 0; i < n; i++) {
+      ScreenListItem* item = (ScreenListItem*) Panel_get(super, i);
+      this->settings->screens[i] = item->ss;
+   }
+   this->settings->nScreens = n;
+}
+
+static void addNewScreen(Panel* super) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   const char* name = "New";
+   ScreenSettings* ss = Settings_newScreen(this->settings, &(const ScreenDefaults){ .name = name, .columns = "PID Command", .sortKey = "PID" });
+   ScreenListItem* item = ScreenListItem_new(name, ss);
+   int idx = Panel_getSelectedIndex(super);
+   Panel_insert(super, idx + 1, (Object*) item);
+   Panel_setSelected(super, idx + 1);
+}
+
+static HandlerResult ScreensPanel_eventHandlerNormal(Panel* super, int ch) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   int selected = Panel_getSelectedIndex(super);
+   ScreenListItem* oldFocus = (ScreenListItem*) Panel_getSelected(super);
+   bool shouldRebuildArray = false;
+   HandlerResult result = IGNORED;
+   switch(ch) {
+      case '\n':
+      case '\r':
+      case KEY_ENTER:
+      case KEY_MOUSE:
+      case KEY_RECLICK:
+      {
+         this->moving = !(this->moving);
+         Panel_setSelectionColor(super, this->moving ? PANEL_SELECTION_FOLLOW : PANEL_SELECTION_FOCUS);
+         ListItem* item = (ListItem*) Panel_getSelected(super);
+         if (item)
+            item->moving = this->moving;
+         result = HANDLED;
+         break;
+      }
+      case EVENT_SET_SELECTED:
+         result = HANDLED;
+         break;
+      case KEY_NPAGE:
+      case KEY_PPAGE:
+      case KEY_HOME:
+      case KEY_END: {
+         Panel_onKey(super, ch);
+         break;
+      }
+      case KEY_F(2):
+      case KEY_CTRL('R'):
+      {
+         startRenaming(super);
+         result = HANDLED;
+         break;
+      }
+      case KEY_F(5):
+      case KEY_CTRL('N'):
+      {
+         addNewScreen(super);
+         startRenaming(super);
+         shouldRebuildArray = true;
+         result = HANDLED;
+         break;
+      }
+      case KEY_UP:
+      {
+         if (!this->moving) {
+            Panel_onKey(super, ch);
+            break;
+         }
+         /* else fallthrough */
+      } /* FALLTHRU */
+      case KEY_F(7):
+      case '[':
+      case '-':
+      {
+         Panel_moveSelectedUp(super);
+         shouldRebuildArray = true;
+         result = HANDLED;
+         break;
+      }
+      case KEY_DOWN:
+      {
+         if (!this->moving) {
+            Panel_onKey(super, ch);
+            break;
+         }
+         /* else fallthrough */
+      } /* FALLTHRU */
+      case KEY_F(8):
+      case ']':
+      case '+':
+      {
+         Panel_moveSelectedDown(super);
+         shouldRebuildArray = true;
+         result = HANDLED;
+         break;
+      }
+      case KEY_F(9):
+      //case KEY_DC:
+      {
+         if (Panel_size(super) > 1) {
+            Panel_remove(super, selected);
+         }
+         shouldRebuildArray = true;
+         result = HANDLED;
+         break;
+      }
+      default:
+      {
+         if (ch < 255 && isalpha(ch))
+            result = Panel_selectByTyping(super, ch);
+         if (result == BREAK_LOOP)
+            result = IGNORED;
+         break;
+      }
+   }
+   ScreenListItem* newFocus = (ScreenListItem*) Panel_getSelected(super);
+   if (newFocus && oldFocus != newFocus) {
+      ColumnsPanel_fill(this->columns, newFocus->ss, this->settings->dynamicColumns);
+      result = HANDLED;
+   }
+   if (shouldRebuildArray)
+      rebuildSettingsArray(super);
+   if (result == HANDLED)
+      ScreensPanel_update(super);
+   return result;
+}
+
+static HandlerResult ScreensPanel_eventHandler(Panel* super, int ch) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   if (this->renaming) {
+      return ScreensPanel_eventHandlerRenaming(super, ch);
+   } else {
+      return ScreensPanel_eventHandlerNormal(super, ch);
+   }
+}
+
+PanelClass ScreensPanel_class = {
+   .super = {
+      .extends = Class(Panel),
+      .delete = ScreensPanel_delete
+   },
+   .eventHandler = ScreensPanel_eventHandler
+};
+
+ScreensPanel* ScreensPanel_new(Settings* settings) {
+   ScreensPanel* this = AllocThis(ScreensPanel);
+   Panel* super = (Panel*) this;
+   Hashtable* columns = settings->dynamicColumns;
+   FunctionBar* fuBar = FunctionBar_new(ScreensFunctions, NULL, NULL);
+   Panel_init(super, 1, 1, 1, 1, Class(ListItem), true, fuBar);
+
+   this->settings = settings;
+   this->columns = ColumnsPanel_new(settings->screens[0], columns, &(settings->changed));
+   this->moving = false;
+   this->renaming = false;
+   super->cursorOn = false;
+   this->cursor = 0;
+   Panel_setHeader(super, "Screens");
+
+   for (unsigned int i = 0; i < settings->nScreens; i++) {
+      ScreenSettings* ss = settings->screens[i];
+      char* name = ss->name;
+      Panel_add(super, (Object*) ScreenListItem_new(name, ss));
+   }
+   return this;
+}
+
+void ScreensPanel_update(Panel* super) {
+   ScreensPanel* this = (ScreensPanel*) super;
+   int size = Panel_size(super);
+   this->settings->changed = true;
+   this->settings->lastUpdate++;
+   this->settings->screens = xReallocArray(this->settings->screens, size + 1, sizeof(ScreenSettings*));
+   for (int i = 0; i < size; i++) {
+      ScreenListItem* item = (ScreenListItem*) Panel_get(super, i);
+      ScreenSettings* ss = item->ss;
+      free(ss->name);
+      this->settings->screens[i] = ss;
+      ss->name = xStrdup(((ListItem*) item)->value);
+   }
+   this->settings->screens[size] = NULL;
+}

ScreensPanel.h

@@ -0,0 +1,53 @@
+#ifndef HEADER_ScreensPanel
+#define HEADER_ScreensPanel
+/*
+htop - ScreensPanel.h
+(C) 2004-2011 Hisham H. Muhammad
+(C) 2020-2022 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include <stdbool.h>
+
+#include "ColumnsPanel.h"
+#include "ListItem.h"
+#include "Object.h"
+#include "Panel.h"
+#include "ScreenManager.h"
+#include "Settings.h"
+
+#ifndef SCREEN_NAME_LEN
+#define SCREEN_NAME_LEN 20
+#endif
+
+typedef struct ScreensPanel_ {
+   Panel super;
+
+   ScreenManager* scr;
+   Settings* settings;
+   ColumnsPanel* columns;
+   char buffer[SCREEN_NAME_LEN + 1];
+   char* saved;
+   int cursor;
+   bool moving;
+   bool renaming;
+} ScreensPanel;
+
+typedef struct ScreenListItem_ {
+   ListItem super;
+   ScreenSettings* ss;
+} ScreenListItem;
+
+
+extern ObjectClass ScreenListItem_class;
+
+ScreenListItem* ScreenListItem_new(const char* value, ScreenSettings* ss);
+
+extern PanelClass ScreensPanel_class;
+
+ScreensPanel* ScreensPanel_new(Settings* settings);
+
+void ScreensPanel_update(Panel* super);
+
+#endif

Settings.h

@@ -19,7 +19,13 @@ in the source distribution for its full text.
 
 #define DEFAULT_DELAY 15
 
-#define CONFIG_READER_MIN_VERSION 2
+#define CONFIG_READER_MIN_VERSION 3
+
+typedef struct {
+   const char* name;
+   const char* columns;
+   const char* sortKey;
+} ScreenDefaults;
 
 typedef struct {
    size_t len;
@@ -27,6 +33,19 @@ typedef struct {
    int* modes;
 } MeterColumnSetting;
 
+typedef struct {
+   char* name;
+   ProcessField* fields;
+   uint32_t flags;
+   int direction;
+   int treeDirection;
+   ProcessField sortKey;
+   ProcessField treeSortKey;
+   bool treeView;
+   bool treeViewAlwaysByPID;
+   bool allBranchesCollapsed;
+} ScreenSettings;
+
 typedef struct Settings_ {
    char* filename;
    int config_version;
@@ -34,16 +53,14 @@ typedef struct Settings_ {
    MeterColumnSetting* hColumns;
    Hashtable* dynamicColumns;
 
-   ProcessField* fields;
-   uint32_t flags;
+   ScreenSettings** screens;
+   unsigned int nScreens;
+   unsigned int ssIndex;
+   ScreenSettings* ss;
+
    int colorScheme;
    int delay;
 
-   int direction;
-   int treeDirection;
-   ProcessField sortKey;
-   ProcessField treeSortKey;
-
    bool countCPUsFromOne;
    bool detailedCPUTime;
    bool showCPUUsage;
@@ -52,9 +69,6 @@ typedef struct Settings_ {
    bool showCPUTemperature;
    bool degreeFahrenheit;
    #endif
-   bool treeView;
-   bool treeViewAlwaysByPID;
-   bool allBranchesCollapsed;
    bool showProgramPath;
    bool shadowOtherUsers;
    bool showThreadNames;
@@ -72,6 +86,7 @@ typedef struct Settings_ {
    bool updateProcessNames;
    bool accountGuestInCPUMeter;
    bool headerMargin;
+   bool screenTabs;
    #ifdef HAVE_GETMOUSE
    bool enableMouse;
    #endif
@@ -81,17 +96,18 @@ typedef struct Settings_ {
    #endif
 
    bool changed;
+   uint64_t lastUpdate;
 } Settings;
 
 #define Settings_cpuId(settings, cpu) ((settings)->countCPUsFromOne ? (cpu)+1 : (cpu))
 
-static inline ProcessField Settings_getActiveSortKey(const Settings* this) {
+static inline ProcessField ScreenSettings_getActiveSortKey(const ScreenSettings* this) {
    return (this->treeView)
           ? (this->treeViewAlwaysByPID ? PID : this->treeSortKey)
           : this->sortKey;
 }
 
-static inline int Settings_getActiveDirection(const Settings* this) {
+static inline int ScreenSettings_getActiveDirection(const ScreenSettings* this) {
    return this->treeView ? this->treeDirection : this->direction;
 }
 
@@ -101,9 +117,13 @@ int Settings_write(const Settings* this, bool onCrash);
 
 Settings* Settings_new(unsigned int initialCpuCount, Hashtable* dynamicColumns);
 
-void Settings_invertSortOrder(Settings* this);
+ScreenSettings* Settings_newScreen(Settings* this, const ScreenDefaults* defaults);
 
-void Settings_setSortKey(Settings* this, ProcessField sortKey);
+void ScreenSettings_delete(ScreenSettings* this);
+
+void ScreenSettings_invertSortOrder(ScreenSettings* this);
+
+void ScreenSettings_setSortKey(ScreenSettings* this, ProcessField sortKey);
 
 void Settings_enableReadonly(void);
 

SignalsPanel.c

@@ -6,8 +6,8 @@ in the source distribution for its full text.
 */
 
 #include "SignalsPanel.h"
+// the above contains #include <signal.h> so do not add that here again (breaks Solaris build)
 
-#include <signal.h>
 #include <stdbool.h>
 
 #include "FunctionBar.h"
@@ -18,15 +18,14 @@ in the source distribution for its full text.
 #include "XUtils.h"
 
 
-Panel* SignalsPanel_new() {
+Panel* SignalsPanel_new(int preSelectedSignal) {
    Panel* this = Panel_new(1, 1, 1, 1, Class(ListItem), true, FunctionBar_newEnterEsc("Send   ", "Cancel "));
-   const int defaultSignal = SIGTERM;
    int defaultPosition = 15;
    unsigned int i;
    for (i = 0; i < Platform_numberOfSignals; i++) {
       Panel_set(this, i, (Object*) ListItem_new(Platform_signals[i].name, Platform_signals[i].number));
       // signal 15 is not always the 15th signal in the table
-      if (Platform_signals[i].number == defaultSignal) {
+      if (Platform_signals[i].number == preSelectedSignal) {
          defaultPosition = i;
       }
    }

SignalsPanel.h

@@ -7,6 +7,12 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "config.h" // IWYU pragma: keep
+
+#ifndef HTOP_SOLARIS
+#include <signal.h>
+#endif
+
 #include "Panel.h"
 
 
@@ -15,6 +21,8 @@ typedef struct SignalItem_ {
    int number;
 } SignalItem;
 
-Panel* SignalsPanel_new(void);
+#define SIGNALSPANEL_INITSELECTEDSIGNAL SIGTERM
+
+Panel* SignalsPanel_new(int preSelectedSignal);
 
 #endif

TempMeter.c

@@ -0,0 +1,29 @@
+#include "TempMeter.h"
+
+#include "CRT.h"
+#include "Object.h"
+#include "Platform.h"
+#include "XUtils.h"
+
+static const int TempMeter_attributes[] = {
+    TEMP};
+
+static void TempMeter_updateValues(Meter *this)
+{
+   float temp_c = Platform_getTemp();
+
+   xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "%.1lf °C", temp_c);
+}
+
+const MeterClass TempMeter_class = {
+    .super = {
+        .extends = Class(Meter),
+        .delete = Meter_delete},
+    .updateValues = TempMeter_updateValues,
+    .defaultMode = TEXT_METERMODE,
+    .maxItems = 1,
+    .total = 100.0,
+    .attributes = TempMeter_attributes,
+    .name = "Temp",
+    .uiName = "CPU Temperature",
+    .caption = "CPU/Temperature: "};

TempMeter.h

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

TraceScreen.c

@@ -10,6 +10,7 @@ in the source distribution for its full text.
 #include "TraceScreen.h"
 
 #include <assert.h>
+#include <errno.h>
 #include <fcntl.h>
 #include <signal.h>
 #include <stdbool.h>
@@ -47,7 +48,9 @@ void TraceScreen_delete(Object* cast) {
    TraceScreen* this = (TraceScreen*) cast;
    if (this->child > 0) {
       kill(this->child, SIGTERM);
-      waitpid(this->child, NULL, 0);
+      while (waitpid(this->child, NULL, 0) == -1)
+         if (errno != EINTR)
+            break;
    }
 
    if (this->strace) {
@@ -87,7 +90,9 @@ bool TraceScreen_forkTracer(TraceScreen* this) {
 
       char buffer[32] = {0};
       xSnprintf(buffer, sizeof(buffer), "%d", this->super.process->pid);
-      execlp("strace", "strace", "-T", "-tt", "-s", "512", "-p", buffer, NULL);
+      // Use of NULL in variadic functions must have a pointer cast.
+      // The NULL constant is not required by standard to have a pointer type.
+      execlp("strace", "strace", "-T", "-tt", "-s", "512", "-p", buffer, (char *)NULL);
 
       // Should never reach here, unless execlp fails ...
       const char* message = "Could not execute 'strace'. Please make sure it is available in your $PATH.";

Vector.c

@@ -29,6 +29,8 @@ Vector* Vector_new(const ObjectClass* type, bool owner, int size) {
    this->items = 0;
    this->type = type;
    this->owner = owner;
+   this->dirty_index = -1;
+   this->dirty_count = 0;
    return this;
 }
 
@@ -44,10 +46,21 @@ void Vector_delete(Vector* this) {
    free(this);
 }
 
+static inline bool Vector_isDirty(const Vector* this) {
+   if (this->dirty_count > 0) {
+      assert(0 <= this->dirty_index && this->dirty_index < this->items);
+      assert(this->dirty_count <= this->items);
+      return true;
+   }
+   assert(this->dirty_index == -1);
+   return false;
+}
+
 #ifndef NDEBUG
 
 static bool Vector_isConsistent(const Vector* this) {
    assert(this->items <= this->arraySize);
+   assert(!Vector_isDirty(this));
 
    if (this->owner) {
       for (int i = 0; i < this->items; i++) {
@@ -60,15 +73,14 @@ static bool Vector_isConsistent(const Vector* this) {
    return true;
 }
 
-unsigned int Vector_count(const Vector* this) {
-   unsigned int items = 0;
+bool Vector_countEquals(const Vector* this, unsigned int expectedCount) {
+   unsigned int n = 0;
    for (int i = 0; i < this->items; i++) {
       if (this->array[i]) {
-         items++;
+         n++;
       }
    }
-   assert(items == (unsigned int)this->items);
-   return items;
+   return n == expectedCount;
 }
 
 Object* Vector_get(const Vector* this, int idx) {
@@ -88,13 +100,16 @@ int Vector_size(const Vector* this) {
 void Vector_prune(Vector* this) {
    assert(Vector_isConsistent(this));
    if (this->owner) {
-      for (int i = 0; i < this->items; i++)
+      for (int i = 0; i < this->items; i++) {
          if (this->array[i]) {
             Object_delete(this->array[i]);
-            //this->array[i] = NULL;
+            this->array[i] = NULL;
+         }
       }
    }
    this->items = 0;
+   this->dirty_index = -1;
+   this->dirty_count = 0;
 }
 
 //static int comparisons = 0;
@@ -242,6 +257,58 @@ Object* Vector_remove(Vector* this, int idx) {
    }
 }
 
+Object* Vector_softRemove(Vector* this, int idx) {
+   assert(idx >= 0 && idx < this->items);
+
+   Object* removed = this->array[idx];
+   assert(removed);
+   if (removed) {
+      this->array[idx] = NULL;
+
+      this->dirty_count++;
+      if (this->dirty_index < 0 || idx < this->dirty_index) {
+         this->dirty_index = idx;
+      }
+
+      if (this->owner) {
+         Object_delete(removed);
+         return NULL;
+      }
+   }
+
+   return removed;
+}
+
+void Vector_compact(Vector* this) {
+   if (!Vector_isDirty(this)) {
+      return;
+   }
+
+   const int size = this->items;
+   assert(0 <= this->dirty_index && this->dirty_index < size);
+   assert(this->array[this->dirty_index] == NULL);
+
+   int idx = this->dirty_index;
+
+   /* one deletion: use memmove, which should be faster */
+   if (this->dirty_count == 1) {
+      memmove(&this->array[idx], &this->array[idx + 1], (this->items - idx - 1) * sizeof(this->array[0]));
+   } else {
+      /* multiple deletions */
+      for (int i = idx + 1; i < size; i++) {
+         if (this->array[i]) {
+            this->array[idx++] = this->array[i];
+         }
+      }
+   }
+
+   this->items -= this->dirty_count;
+   this->dirty_index = -1;
+   this->dirty_count = 0;
+
+   assert(Vector_isConsistent(this));
+}
+
 void Vector_moveUp(Vector* this, int idx) {
    assert(idx >= 0 && idx < this->items);
    assert(Vector_isConsistent(this));

Vector.h

@@ -22,6 +22,11 @@ typedef struct Vector_ {
    int arraySize;
    int growthRate;
    int items;
+   /* lowest index of a pending soft remove/delete operation,
+      used to speed up compaction */
+   int dirty_index;
+   /* count of soft deletes, required for Vector_count to work in debug mode */
+   int dirty_count;
    bool owner;
 } Vector;
 
@@ -44,6 +49,15 @@ Object* Vector_take(Vector* this, int idx);
 
 Object* Vector_remove(Vector* this, int idx);
 
+/* Vector_softRemove marks the item at index idx for deletion without
+   reclaiming any space. If owned, the item is immediately freed.
+
+   Vector_compact must be called to reclaim space.*/
+Object* Vector_softRemove(Vector* this, int idx);
+
+/* Vector_compact reclaims space free'd up by Vector_softRemove, if any. */
+void Vector_compact(Vector* this);
+
 void Vector_moveUp(Vector* this, int idx);
 
 void Vector_moveDown(Vector* this, int idx);
@@ -54,7 +68,11 @@ void Vector_set(Vector* this, int idx, void* data_);
 
 Object* Vector_get(const Vector* this, int idx);
 int Vector_size(const Vector* this);
-unsigned int Vector_count(const Vector* this);
+
+/* Vector_countEquals returns true if the number of non-NULL items
+   in the Vector is equal to expectedCount. This is only for debugging
+   and consistency checks. */
+bool Vector_countEquals(const Vector* this, unsigned int expectedCount);
 
 #else /* NDEBUG */
 

XUtils.c

@@ -94,13 +94,30 @@ void* xReallocArrayZero(void* ptr, size_t prevmemb, size_t newmemb, size_t size)
    return ret;
 }
 
-inline bool String_contains_i(const char* s1, const char* s2) {
+inline bool String_contains_i(const char* s1, const char* s2, bool multi) {
+   // we have a multi-string search term, handle as special case for performance reasons
+   if (multi && strstr(s2, "|")) {
+      size_t nNeedles;
+      char** needles = String_split(s2, '|', &nNeedles);
+      for (size_t i = 0; i < nNeedles; i++) {
+         if (strcasestr(s1, needles[i]) != NULL) {
+            String_freeArray(needles);
+            return true;
+         }
+       }
+       String_freeArray(needles);
+       return false;
+   } else {
       return strcasestr(s1, s2) != NULL;
    }
+}
 
 char* String_cat(const char* s1, const char* s2) {
    const size_t l1 = strlen(s1);
    const size_t l2 = strlen(s2);
+   if (SIZE_MAX - l1 <= l2) {
+      fail();
+   }
    char* out = xMalloc(l1 + l2 + 1);
    memcpy(out, s1, l1);
    memcpy(out + l1, s2, l2);
@@ -122,10 +139,10 @@ char* String_trim(const char* in) {
 }
 
 char** String_split(const char* s, char sep, size_t* n) {
-   const unsigned int rate = 10;
+   const size_t rate = 10;
    char** out = xCalloc(rate, sizeof(char*));
    size_t ctr = 0;
-   unsigned int blocks = rate;
+   size_t blocks = rate;
    const char* where;
    while ((where = strchr(s, sep)) != NULL) {
       size_t size = (size_t)(where - s);
@@ -160,36 +177,9 @@ void String_freeArray(char** s) {
    free(s);
 }
 
-char* String_getToken(const char* line, const unsigned short int numMatch) {
-   const size_t len = strlen(line);
-   char inWord = 0;
-   unsigned short int count = 0;
-   char match[50];
-
-   size_t foundCount = 0;
-
-   for (size_t i = 0; i < len; i++) {
-      char lastState = inWord;
-      inWord = line[i] == ' ' ? 0 : 1;
-
-      if (lastState == 0 && inWord == 1)
-         count++;
-
-      if (inWord == 1) {
-         if (count == numMatch && line[i] != ' ' && line[i] != '\0' && line[i] != '\n' && line[i] != (char)EOF) {
-            match[foundCount] = line[i];
-            foundCount++;
-         }
-      }
-   }
-
-   match[foundCount] = '\0';
-   return xStrdup(match);
-}
-
 char* String_readLine(FILE* fd) {
-   const unsigned int step = 1024;
-   unsigned int bufSize = step;
+   const size_t step = 1024;
+   size_t bufSize = step;
    char* buffer = xMalloc(step + 1);
    char* at = buffer;
    for (;;) {

XUtils.h

@@ -17,7 +17,6 @@ in the source distribution for its full text.
 #include "Compat.h"
 #include "Macros.h"
 
-
 void fail(void) ATTR_NORETURN;
 
 void *xMalloc(size_t size) ATTR_ALLOC_SIZE1(1) ATTR_MALLOC;
@@ -36,13 +35,15 @@ void* xReallocArrayZero(void* ptr, size_t prevmemb, size_t newmemb, size_t size)
  * String_startsWith gives better performance if strlen(match) can be computed
  * at compile time (e.g. when they are immutable string literals). :)
  */
-static inline bool String_startsWith(const char* s, const char* match) {
+static inline bool String_startsWith(const char *s, const char *match)
+{
    return strncmp(s, match, strlen(match)) == 0;
 }
 
-bool String_contains_i(const char* s1, const char* s2);
+bool String_contains_i(const char *s1, const char *s2, bool multi);
 
-static inline bool String_eq(const char* s1, const char* s2) {
+static inline bool String_eq(const char *s1, const char *s2)
+{
    return strcmp(s1, s2) == 0;
 }
 
@@ -54,8 +55,6 @@ char** String_split(const char* s, char sep, size_t* n);
 
 void String_freeArray(char **s);
 
-char* String_getToken(const char* line, unsigned short int numMatch) ATTR_MALLOC;
-
 char *String_readLine(FILE *fd) ATTR_MALLOC;
 
 /* Always null-terminates dest. Caller must pass a strictly positive size. */

configure.ac

@@ -6,13 +6,13 @@
 # ----------------------------------------------------------------------
 
 AC_PREREQ([2.69])
-AC_INIT([htop], [3.1.2], [htop@groups.io], [], [https://htop.dev/])
+AC_INIT([htop], [3.2.1], [htop@groups.io], [], [https://htop.dev/])
 
 AC_CONFIG_SRCDIR([htop.c])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_HEADERS([config.h])
 
-AC_CANONICAL_TARGET
+AC_CANONICAL_HOST
 AM_INIT_AUTOMAKE([-Wall std-options subdir-objects])
 
 # ----------------------------------------------------------------------
@@ -22,7 +22,7 @@ AM_INIT_AUTOMAKE([-Wall std-options subdir-objects])
 # Checks for platform.
 # ----------------------------------------------------------------------
 
-case "$target_os" in
+case "$host_os" in
 linux*|gnu*)
    my_htop_platform=linux
    AC_DEFINE([HTOP_LINUX], [], [Building for Linux.])
@@ -419,13 +419,23 @@ case "$enable_unwind" in
          AC_CHECK_LIB([lzma], [lzma_index_buffer_decode])
       fi
       AC_CHECK_LIB([unwind], [backtrace], [], [enable_unwind=no])
-      AC_CHECK_HEADERS([libunwind.h], [], [enable_unwind=no])
+      AC_CHECK_HEADERS([libunwind.h], [], [
+         old_CFLAGS="$CFLAGS"
+         CFLAGS="$CFLAGS -I/usr/include/libunwind"
+         AC_CHECK_HEADERS([libunwind/libunwind.h], [], [
+            enable_unwind=no
+            CFLAGS="$old_CFLAGS"
+         ])
+      ])
       ;;
    no)
       ;;
    yes)
       AC_CHECK_LIB([unwind], [backtrace], [], [AC_MSG_ERROR([can not find required library libunwind])])
-      AC_CHECK_HEADERS([libunwind.h], [], [AC_MSG_ERROR([can not find require header file libunwind.h])])
+      AC_CHECK_HEADERS([libunwind.h], [], [
+         CFLAGS="$CFLAGS -I/usr/include/libunwind"
+         AC_CHECK_HEADERS([libunwind/libunwind.h], [], [AC_MSG_ERROR([can not find required header file libunwind.h])])
+      ])
       ;;
    *)
       AC_MSG_ERROR([bad value '$enable_unwind' for --enable-unwind])
@@ -446,8 +456,18 @@ case "$enable_hwloc" in
    no)
       ;;
    yes)
+      m4_ifdef([PKG_PROG_PKG_CONFIG], [
+         PKG_PROG_PKG_CONFIG()
+         PKG_CHECK_MODULES(HWLOC, hwloc, [
+               CFLAGS="$CFLAGS $HWLOC_CFLAGS" LIBS="$LIBS $HWLOC_LIBS"
+            ], [
                AC_CHECK_LIB([hwloc], [hwloc_get_proc_cpubind], [], [AC_MSG_ERROR([can not find required library libhwloc])])
                AC_CHECK_HEADERS([hwloc.h], [], [AC_MSG_ERROR([can not find require header file hwloc.h])])
+            ])
+         ], [
+            AC_CHECK_LIB([hwloc], [hwloc_get_proc_cpubind], [], [AC_MSG_ERROR([can not find required library libhwloc])])
+            AC_CHECK_HEADERS([hwloc.h], [], [AC_MSG_ERROR([can not find require header file hwloc.h])])
+         ])
       ;;
    *)
       AC_MSG_ERROR([bad value '$enable_hwloc' for --enable-hwloc])
@@ -703,7 +723,7 @@ AC_SUBST([AM_CPPFLAGS])
 # We're done, let's go!
 # ----------------------------------------------------------------------
 
-AC_DEFINE_UNQUOTED([COPYRIGHT], ["(C) 2004-2019 Hisham Muhammad. (C) 2020-2021 htop dev team."], [Copyright message.])
+AC_DEFINE_UNQUOTED([COPYRIGHT], ["(C) 2004-2019 Hisham Muhammad. (C) 2020-2022 htop dev team."], [Copyright message.])
 
 AM_CONDITIONAL([HTOP_LINUX], [test "$my_htop_platform" = linux])
 AM_CONDITIONAL([HTOP_FREEBSD], [test "$my_htop_platform" = freebsd])

darwin/DarwinProcess.c

@@ -12,6 +12,7 @@ in the source distribution for its full text.
 #include <stdlib.h>
 #include <string.h>
 #include <mach/mach.h>
+#include <sys/dirent.h>
 
 #include "CRT.h"
 #include "Process.h"
@@ -26,7 +27,7 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [PPID] = { .name = "PPID", .title = "PPID", .description = "Parent process ID", .flags = 0, .pidColumn = true, },
    [PGRP] = { .name = "PGRP", .title = "PGRP", .description = "Process group ID", .flags = 0, .pidColumn = true, },
    [SESSION] = { .name = "SESSION", .title = "SID", .description = "Process's session ID", .flags = 0, .pidColumn = true, },
-   [TTY] = { .name = "TTY", .title = "TTY      ", .description = "Controlling terminal", .flags = 0, },
+   [TTY] = { .name = "TTY", .title = "TTY      ", .description = "Controlling terminal", .flags = PROCESS_FLAG_TTY, },
    [TPGID] = { .name = "TPGID", .title = "TPGID", .description = "Process ID of the fg process group of the controlling terminal", .flags = 0, .pidColumn = true, },
    [MINFLT] = { .name = "MINFLT", .title = "     MINFLT ", .description = "Number of minor faults which have not required loading a memory page from disk", .flags = 0, .defaultSortDesc = true, },
    [MAJFLT] = { .name = "MAJFLT", .title = "     MAJFLT ", .description = "Number of major faults which have required loading a memory page from disk", .flags = 0, .defaultSortDesc = true, },
@@ -38,8 +39,8 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [M_VIRT] = { .name = "M_VIRT", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, .defaultSortDesc = true, },
    [M_RESIDENT] = { .name = "M_RESIDENT", .title = "  RES ", .description = "Resident set size, size of the text and data sections, plus stack usage", .flags = 0, .defaultSortDesc = true, },
    [ST_UID] = { .name = "ST_UID", .title = "UID", .description = "User ID of the process owner", .flags = 0, },
-   [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, .defaultSortDesc = true, },
-   [PERCENT_NORM_CPU] = { .name = "PERCENT_NORM_CPU", .title = "NCPU%", .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)", .flags = 0, .defaultSortDesc = true, },
+   [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = " CPU%", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, .defaultSortDesc = true, .autoWidth = true, },
+   [PERCENT_NORM_CPU] = { .name = "PERCENT_NORM_CPU", .title = "NCPU%", .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)", .flags = 0, .defaultSortDesc = true, .autoWidth = true, },
    [PERCENT_MEM] = { .name = "PERCENT_MEM", .title = "MEM% ", .description = "Percentage of the memory the process is using, based on resident memory size", .flags = 0, .defaultSortDesc = true, },
    [USER] = { .name = "USER", .title = "USER       ", .description = "Username of the process owner (or user ID if name cannot be determined)", .flags = 0, },
    [TIME] = { .name = "TIME", .title = "  TIME+  ", .description = "Total time the process has spent in user and system time", .flags = 0, .defaultSortDesc = true, },
@@ -276,6 +277,18 @@ static long long int nanosecondsToCentiseconds(uint64_t nanoseconds) {
    return nanoseconds / nanoseconds_per_second * centiseconds_per_second;
 }
 
+static char* DarwinProcess_getDevname(dev_t dev) {
+   if (dev == NODEV) {
+      return NULL;
+   }
+   char buf[sizeof("/dev/") + MAXNAMLEN];
+   char *name = devname_r(dev, S_IFCHR, buf, MAXNAMLEN);
+   if (name) {
+      return xStrdup(name);
+   }
+   return NULL;
+}
+
 void DarwinProcess_setFromKInfoProc(Process* proc, const struct kinfo_proc* ps, bool exists) {
    DarwinProcess* dp = (DarwinProcess*)proc;
 
@@ -306,15 +319,8 @@ void DarwinProcess_setFromKInfoProc(Process* proc, const struct kinfo_proc* ps,
       proc->isKernelThread = false;
       proc->isUserlandThread = false;
       dp->translated = ps->kp_proc.p_flag & P_TRANSLATED;
-
       proc->tty_nr = ps->kp_eproc.e_tdev;
-      const char* name = (ps->kp_eproc.e_tdev != NODEV) ? devname(ps->kp_eproc.e_tdev, S_IFCHR) : NULL;
-      if (!name) {
-         free(proc->tty_name);
       proc->tty_name = NULL;
-      } else {
-         free_and_xStrdup(&proc->tty_name, name);
-      }
 
       proc->starttime_ctime = ep->p_starttime.tv_sec;
       Process_fillStarttimeBuffer(proc);
@@ -322,11 +328,28 @@ void DarwinProcess_setFromKInfoProc(Process* proc, const struct kinfo_proc* ps,
       DarwinProcess_updateExe(ep->p_pid, proc);
       DarwinProcess_updateCmdLine(ps, proc);
 
-      if (proc->settings->flags & PROCESS_FLAG_CWD) {
+      if (proc->settings->ss->flags & PROCESS_FLAG_CWD) {
          DarwinProcess_updateCwd(ep->p_pid, proc);
       }
    }
 
+   if (proc->tty_name == NULL && (dev_t)proc->tty_nr != NODEV) {
+      /* The call to devname() is extremely expensive (due to lstat)
+       * and represents ~95% of htop's CPU usage when there is high
+       * process turnover.
+       *
+       * To mitigate this we only fetch TTY information if the TTY
+       * field is enabled in the settings.
+       */
+      if (proc->settings->ss->flags & PROCESS_FLAG_TTY) {
+         proc->tty_name = DarwinProcess_getDevname(proc->tty_nr);
+         if (!proc->tty_name) {
+            /* devname failed: prevent us from calling it again */
+            proc->tty_nr = NODEV;
+         }
+      }
+   }
+
    /* Mutable information */
    proc->nice = ep->p_nice;
    proc->priority = ep->p_priority;
@@ -354,6 +377,7 @@ void DarwinProcess_setFromLibprocPidinfo(DarwinProcess* proc, DarwinProcessList*
       } else {
          proc->super.percent_cpu = 0.0;
       }
+      Process_updateCPUFieldWidths(proc->super.percent_cpu);
 
       proc->super.time = nanosecondsToCentiseconds(total_current_time_ns);
       proc->super.nlwp = pti.pti_threadnum;

darwin/DarwinProcess.h

@@ -13,6 +13,8 @@ in the source distribution for its full text.
 #include "darwin/DarwinProcessList.h"
 
 
+#define PROCESS_FLAG_TTY 0x00000100
+
 typedef struct DarwinProcess_ {
    Process super;
 

darwin/Platform.c

@@ -49,7 +49,15 @@ in the source distribution for its full text.
 #endif
 
 
-const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+const ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME Command",
+      .sortKey = "PERCENT_CPU",
+   },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
 
 const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },

darwin/Platform.h

@@ -26,7 +26,9 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern const ProcessField Platform_defaultFields[];
+extern const ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 extern const SignalItem Platform_signals[];
 

darwin/PlatformHelpers.h

@@ -2,8 +2,8 @@
 #define HEADER_PlatformHelpers
 /*
 htop - darwin/PlatformHelpers.h
-(C) 2018 Pierre Malhaire, 2020-2021 htop dev team, 2021 Alexander Momchilov
-Released under the GNU GPLv2, see the COPYING file
+(C) 2018 Pierre Malhaire, 2020-2022 htop dev team, 2021 Alexander Momchilov
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

docs/styleguide.md

@@ -219,7 +219,7 @@ The primary user documentation should be the man file which you can find in `hto
 
 Additional documentation, like this file, should be written in gh-style markdown.
 Make each sentence one line.
-Markdown will combined these in output formats.
+Markdown will combine these in output formats.
 It does only insert a paragraph if you insert a blank line into the source file.
 This way git can better diff and present the changes when documentation is altered.
 

dragonflybsd/DragonFlyBSDProcess.c

@@ -38,8 +38,8 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [M_VIRT] = { .name = "M_VIRT", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, .defaultSortDesc = true, },
    [M_RESIDENT] = { .name = "M_RESIDENT", .title = "  RES ", .description = "Resident set size, size of the text and data sections, plus stack usage", .flags = 0, .defaultSortDesc = true, },
    [ST_UID] = { .name = "ST_UID", .title = "UID", .description = "User ID of the process owner", .flags = 0, },
-   [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, .defaultSortDesc = true, },
-   [PERCENT_NORM_CPU] = { .name = "PERCENT_NORM_CPU", .title = "NCPU%", .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)", .flags = 0, .defaultSortDesc = true, },
+   [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = " CPU%", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, .defaultSortDesc = true, .autoWidth = true, },
+   [PERCENT_NORM_CPU] = { .name = "PERCENT_NORM_CPU", .title = "NCPU%", .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)", .flags = 0, .defaultSortDesc = true, .autoWidth = true, },
    [PERCENT_MEM] = { .name = "PERCENT_MEM", .title = "MEM% ", .description = "Percentage of the memory the process is using, based on resident memory size", .flags = 0, .defaultSortDesc = true, },
    [USER] = { .name = "USER", .title = "USER       ", .description = "Username of the process owner (or user ID if name cannot be determined)", .flags = 0, },
    [TIME] = { .name = "TIME", .title = "  TIME+  ", .description = "Total time the process has spent in user and system time", .flags = 0, .defaultSortDesc = true, },

dragonflybsd/DragonFlyBSDProcessList.c

@@ -481,7 +481,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
          DragonFlyBSDProcessList_updateExe(kproc, proc);
          DragonFlyBSDProcessList_updateProcessName(dfpl->kd, kproc, proc);
 
-         if (settings->flags & PROCESS_FLAG_CWD) {
+         if (settings->ss->flags & PROCESS_FLAG_CWD) {
             DragonFlyBSDProcessList_updateCwd(kproc, proc);
          }
 
@@ -513,6 +513,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
 
       proc->percent_cpu = 100.0 * ((double)kproc->kp_lwp.kl_pctcpu / (double)kernelFScale);
       proc->percent_mem = 100.0 * proc->m_resident / (double)(super->totalMem);
+      Process_updateCPUFieldWidths(proc->percent_cpu);
 
       if (proc->percent_cpu > 0.1) {
          // system idle process should own all CPU time left regardless of CPU count

dragonflybsd/Platform.c

@@ -32,8 +32,15 @@ in the source distribution for its full text.
 #include "dragonflybsd/DragonFlyBSDProcess.h"
 #include "dragonflybsd/DragonFlyBSDProcessList.h"
 
+const ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME Command",
+      .sortKey = "PERCENT_CPU",
+   },
+};
 
-const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
 
 const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },

dragonflybsd/Platform.h

@@ -29,7 +29,9 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern const ProcessField Platform_defaultFields[];
+extern const ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 extern const SignalItem Platform_signals[];
 

freebsd/FreeBSDProcess.c

@@ -37,8 +37,8 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [M_VIRT] = { .name = "M_VIRT", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, .defaultSortDesc = true, },
    [M_RESIDENT] = { .name = "M_RESIDENT", .title = "  RES ", .description = "Resident set size, size of the text and data sections, plus stack usage", .flags = 0, .defaultSortDesc = true, },
    [ST_UID] = { .name = "ST_UID", .title = "UID", .description = "User ID of the process owner", .flags = 0, },
-   [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, .defaultSortDesc = true, },
-   [PERCENT_NORM_CPU] = { .name = "PERCENT_NORM_CPU", .title = "NCPU%", .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)", .flags = 0, .defaultSortDesc = true, },
+   [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = " CPU%", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, .defaultSortDesc = true, .autoWidth = true, },
+   [PERCENT_NORM_CPU] = { .name = "PERCENT_NORM_CPU", .title = "NCPU%", .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)", .flags = 0, .defaultSortDesc = true, .autoWidth = true, },
    [PERCENT_MEM] = { .name = "PERCENT_MEM", .title = "MEM% ", .description = "Percentage of the memory the process is using, based on resident memory size", .flags = 0, .defaultSortDesc = true, },
    [USER] = { .name = "USER", .title = "USER       ", .description = "Username of the process owner (or user ID if name cannot be determined)", .flags = 0, },
    [TIME] = { .name = "TIME", .title = "  TIME+  ", .description = "Total time the process has spent in user and system time", .flags = 0, .defaultSortDesc = true, },
@@ -49,6 +49,7 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [CWD] = { .name = "CWD", .title = "CWD                       ", .description = "The current working directory of the process", .flags = PROCESS_FLAG_CWD, },
    [JID] = { .name = "JID", .title = "JID", .description = "Jail prison ID", .flags = 0, .pidColumn = true, },
    [JAIL] = { .name = "JAIL", .title = "JAIL        ", .description = "Jail prison name", .flags = 0, },
+   [EMULATION] = { .name = "EMULATION", .title = "EMULATION        ", .description = "System call emulation environment (ABI)", .flags = 0, },
 };
 
 Process* FreeBSDProcess_new(const Settings* settings) {
@@ -61,6 +62,7 @@ Process* FreeBSDProcess_new(const Settings* settings) {
 void Process_delete(Object* cast) {
    FreeBSDProcess* this = (FreeBSDProcess*) cast;
    Process_done((Process*)cast);
+   free(this->emul);
    free(this->jname);
    free(this);
 }
@@ -77,6 +79,9 @@ static void FreeBSDProcess_writeField(const Process* this, RichString* str, Proc
    case JAIL:
       Process_printLeftAlignedField(str, attr, fp->jname ? fp->jname : "N/A", 11);
       return;
+   case EMULATION:
+      Process_printLeftAlignedField(str, attr, fp->emul ? fp->emul : "N/A", 16);
+      return;
    default:
       Process_writeField(this, str, field);
       return;
@@ -94,6 +99,8 @@ static int FreeBSDProcess_compareByKey(const Process* v1, const Process* v2, Pro
       return SPACESHIP_NUMBER(p1->jid, p2->jid);
    case JAIL:
       return SPACESHIP_NULLSTR(p1->jname, p2->jname);
+   case EMULATION:
+      return SPACESHIP_NULLSTR(p1->emul, p2->emul);
    default:
       return Process_compareByKey_Base(v1, v2, key);
    }

freebsd/FreeBSDProcess.h

@@ -18,6 +18,7 @@ typedef struct FreeBSDProcess_ {
    Process super;
    int   jid;
    char* jname;
+   char* emul;
 } FreeBSDProcess;
 
 extern const ProcessClass FreeBSDProcess_class;

freebsd/FreeBSDProcessList.c

@@ -509,6 +509,9 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
          proc->pgrp = kproc->ki_pgid;
          proc->st_uid = kproc->ki_uid;
          proc->starttime_ctime = kproc->ki_start.tv_sec;
+         if (proc->starttime_ctime < 0) {
+            proc->starttime_ctime = super->realtimeMs / 1000;
+         }
          Process_fillStarttimeBuffer(proc);
          proc->user = UsersTable_getRef(super->usersTable, proc->st_uid);
          ProcessList_add(super, proc);
@@ -516,7 +519,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
          FreeBSDProcessList_updateExe(kproc, proc);
          FreeBSDProcessList_updateProcessName(fpl->kd, kproc, proc);
 
-         if (settings->flags & PROCESS_FLAG_CWD) {
+         if (settings->ss->flags & PROCESS_FLAG_CWD) {
             FreeBSDProcessList_updateCwd(kproc, proc);
          }
 
@@ -549,6 +552,8 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
          }
       }
 
+      free_and_xStrdup(&fp->emul, kproc->ki_emul);
+
       // from FreeBSD source /src/usr.bin/top/machine.c
       proc->m_virt = kproc->ki_size / ONE_K;
       proc->m_resident = kproc->ki_rssize * pageSizeKb;
@@ -557,6 +562,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
 
       proc->percent_cpu = 100.0 * ((double)kproc->ki_pctcpu / (double)kernelFScale);
       proc->percent_mem = 100.0 * proc->m_resident / (double)(super->totalMem);
+      Process_updateCPUFieldWidths(proc->percent_cpu);
 
       if (kproc->ki_stat == SRUN && kproc->ki_oncpu != NOCPU) {
          proc->processor = kproc->ki_oncpu;

freebsd/Platform.c

@@ -50,8 +50,15 @@ in the source distribution for its full text.
 #include "zfs/ZfsArcMeter.h"
 #include "zfs/ZfsCompressedArcMeter.h"
 
+const ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME Command",
+      .sortKey = "PERCENT_CPU",
+   },
+};
 
-const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
 
 const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },
@@ -220,6 +227,7 @@ double Platform_setCPUValues(Meter* this, unsigned int cpu) {
 
 void Platform_setMemoryValues(Meter* this) {
    const ProcessList* pl = this->pl;
+   const FreeBSDProcessList* fpl = (const FreeBSDProcessList*) pl;
 
    this->total = pl->totalMem;
    this->values[0] = pl->usedMem;
@@ -227,6 +235,16 @@ void Platform_setMemoryValues(Meter* this) {
    // this->values[2] = "shared memory, like tmpfs and shm"
    this->values[3] = pl->cachedMem;
    // this->values[4] = "available memory"
+
+   if (fpl->zfs.enabled) {
+      // ZFS does not shrink below the value of zfs_arc_min.
+      unsigned long long int shrinkableSize = 0;
+      if (fpl->zfs.size > fpl->zfs.min)
+         shrinkableSize = fpl->zfs.size - fpl->zfs.min;
+      this->values[0] -= shrinkableSize;
+      this->values[3] += shrinkableSize;
+      // this->values[4] += shrinkableSize;
+   }
 }
 
 void Platform_setSwapValues(Meter* this) {

freebsd/Platform.h

@@ -25,7 +25,9 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern const ProcessField Platform_defaultFields[];
+extern const ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 extern const SignalItem Platform_signals[];
 

freebsd/ProcessField.h

@@ -11,6 +11,7 @@ in the source distribution for its full text.
 #define PLATFORM_PROCESS_FIELDS  \
    JID = 100,                    \
    JAIL = 101,                   \
+   EMULATION = 102,              \
                                  \
    DUMMY_BUMP_FIELD = CWD,       \
    // End of list

generic/openzfs_sysctl.c

@@ -15,6 +15,7 @@ in the source distribution for its full text.
 
 
 static int MIB_kstat_zfs_misc_arcstats_size[5];
+static int MIB_kstat_zfs_misc_arcstats_c_min[5];
 static int MIB_kstat_zfs_misc_arcstats_c_max[5];
 static int MIB_kstat_zfs_misc_arcstats_mfu_size[5];
 static int MIB_kstat_zfs_misc_arcstats_mru_size[5];
@@ -35,6 +36,7 @@ void openzfs_sysctl_init(ZfsArcStats* stats) {
       len = 5;
       sysctlnametomib("kstat.zfs.misc.arcstats.size", MIB_kstat_zfs_misc_arcstats_size, &len);
 
+      sysctlnametomib("kstat.zfs.misc.arcstats.c_min", MIB_kstat_zfs_misc_arcstats_c_min, &len);
       sysctlnametomib("kstat.zfs.misc.arcstats.c_max", MIB_kstat_zfs_misc_arcstats_c_max, &len);
       sysctlnametomib("kstat.zfs.misc.arcstats.mfu_size", MIB_kstat_zfs_misc_arcstats_mfu_size, &len);
       sysctlnametomib("kstat.zfs.misc.arcstats.mru_size", MIB_kstat_zfs_misc_arcstats_mru_size, &len);
@@ -61,6 +63,10 @@ void openzfs_sysctl_updateArcStats(ZfsArcStats* stats) {
       sysctl(MIB_kstat_zfs_misc_arcstats_size, 5, &(stats->size), &len, NULL, 0);
       stats->size /= 1024;
 
+      len = sizeof(stats->min);
+      sysctl(MIB_kstat_zfs_misc_arcstats_c_min, 5, &(stats->min), &len, NULL, 0);
+      stats->min /= 1024;
+
       len = sizeof(stats->max);
       sysctl(MIB_kstat_zfs_misc_arcstats_c_max, 5, &(stats->max), &len, NULL, 0);
       stats->max /= 1024;

generic/uname.c

@@ -85,7 +85,7 @@ char* Generic_uname(void) {
 
       if (uname_result == 0) {
          size_t written = xSnprintf(savedString, sizeof(savedString), "%s %s [%s]", uname_info.sysname, uname_info.release, uname_info.machine);
-         if (!String_contains_i(savedString, distro) && sizeof(savedString) > written)
+         if (!String_contains_i(savedString, distro, false) && sizeof(savedString) > written)
             snprintf(savedString + written, sizeof(savedString) - written, " @ %s", distro);
       } else {
          snprintf(savedString, sizeof(savedString), "%s", distro);

htop.1.in

@@ -1,4 +1,4 @@
-.TH "HTOP" "1" "2021" "@PACKAGE_STRING@" "User Commands"
+.TH "HTOP" "1" "2022" "@PACKAGE_STRING@" "User Commands"
 .SH "NAME"
 htop, pcp-htop \- interactive process viewer
 .SH "SYNOPSIS"
@@ -50,7 +50,8 @@ Start
 in monochrome mode
 .TP
 \fB\-F \-\-filter=FILTER
-Filter processes by command
+Filter processes by terms matching the commands. The terms are matched
+case-insensitive and as fixed strings (not regexs). You can separate multiple terms with "|".
 .TP
 \fB\-h \-\-help
 Display a help message and exit
@@ -95,6 +96,10 @@ held.
 The following commands are supported while in
 .BR htop :
 .TP 5
+.B Tab, Shift-Tab
+Select the next / the previous screen tab to display.
+You can enable showing the screen tab names in the Setup screen (F2).
+.TP
 .B Up, Alt-k
 Select (highlight) the previous process in the process list. Scroll the list
 if necessary.
@@ -175,6 +180,8 @@ bindings take precedence.
 Incremental process filtering: type in part of a process command line and
 only processes whose names match will be shown. To cancel filtering,
 enter the Filter option again and press Esc.
+The matching is done case-insensitive. Terms are fixed strings (no regex).
+You can separate multiple terms with "|".
 .TP
 .B F5, t
 Tree view: organize processes by parenthood, and layout the relations
@@ -289,6 +296,8 @@ highlighting can be configured for stale executables (cf. EXE column below).
 .TP
 .B COMM
 The command name of the process obtained from /proc/[pid]/comm, if readable.
+
+Requires Linux kernel 2.6.33 or newer.
 .TP
 .B EXE
 The abbreviated basename of the executable of the process, obtained from
@@ -310,6 +319,8 @@ been replaced or deleted.
 
 This additional color markup can be configured in the "Display Options" section of
 the setup screen.
+
+Displaying EXE requires CAP_SYS_PTRACE and PTRACE_MODE_READ_FSCRED.
 .TP
 .B PID
 The process ID.
@@ -496,7 +507,7 @@ This performs some pattern-based replacements to shorten the displayed string an
    \fB/*.slice\fR is shortened to \fB/[*]\fR (exceptions below)
    \fB/system.slice\fR is shortened to \fB/[S]\fR
    \fB/user.slice\fR is shortened to \fB/[U]\fR
-   \fB/user-*.slice\fR is shortened to \fB/[U:*]\fR (directly preceeding \fB/[U]\fR before dropped)
+   \fB/user-*.slice\fR is shortened to \fB/[U:*]\fR (directly preceding \fB/[U]\fR before dropped)
    \fB/machine.slice\fR is shortened to \fB/[M]\fR
    \fB/machine-*.scope\fR is shortened to \fB/[SNC:*]\fR (SNC: systemd nspawn container), uppercase for the monitor
    \fB/lxc.monitor.*\fR is shortened to \fB/[LXC:*]\fR
@@ -527,12 +538,6 @@ The percentage of time spent waiting for the completion of synchronous block I/O
 .B PERCENT_SWAP_DELAY (SWAPD%)
 The percentage of time spent swapping in pages. Requires CAP_NET_ADMIN.
 .TP
-.B COMM
-The command name for the process. Requires Linux kernel 2.6.33 or newer.
-.TP
-.B EXE
-The executable file of the process as reported by the kernel. Requires CAP_SYS_PTRACE and PTRACE_MODE_READ_FSCRED.
-.TP
 .B AGRP
 The autogroup identifier for the process. Requires Linux CFS to be enabled.
 .TP
@@ -663,7 +668,7 @@ communities, and forms part of the Performance Co-Pilot suite of tools.
 .SH "COPYRIGHT"
 Copyright \(co 2004-2019 Hisham Muhammad.
 .br
-Copyright \(co 2020-2021 htop dev team.
+Copyright \(co 2020-2022 htop dev team.
 .LP
 License GPLv2+: GNU General Public License version 2 or, at your option, any later version.
 .LP

linux/CGroupUtils.c

@@ -33,7 +33,7 @@ static bool StrBuf_putc_write(StrBuf_state* p, char c) {
 }
 
 static bool StrBuf_putsn(StrBuf_state* p, StrBuf_putc_t w, const char* s, size_t count) {
-   while (count--)
+   for (; count; count--)
       if (!w(p, *s++))
          return false;
 
@@ -66,6 +66,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
    const char* str_user_slice = "user.slice";
    const char* str_machine_slice = "machine.slice";
    const char* str_user_slice_prefix = "/user-";
+   const char* str_system_slice_prefix = "/system-";
 
    const char* str_lxc_monitor_legacy = "lxc.monitor";
    const char* str_lxc_payload_legacy = "lxc.payload";
@@ -76,6 +77,8 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
    const char* str_nspawn_monitor_label = "/supervisor";
    const char* str_nspawn_payload_label = "/payload";
 
+   const char* str_snap_scope_prefix = "snap.";
+
    const char* str_service_suffix = ".service";
    const char* str_scope_suffix = ".scope";
 
@@ -100,6 +103,11 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
          if (!StrBuf_putsz(s, w, "[S]"))
             return false;
 
+         if (String_startsWith(cgroup, str_system_slice_prefix)) {
+            cgroup = strchrnul(cgroup + 1, '/');
+            continue;
+         }
+
          continue;
       }
 
@@ -266,6 +274,22 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
             else if (String_startsWith(nextSlash, str_nspawn_payload_label))
                cgroup += strlen(str_nspawn_payload_label);
 
+            continue;
+         } else if(Label_checkPrefix(labelStart, scopeNameLen, str_snap_scope_prefix)) {
+            const char* nextDot = strchrnul(labelStart + strlen(str_snap_scope_prefix), '.');
+
+            if (!StrBuf_putsz(s, w, "!snap:"))
+               return false;
+
+            if (nextDot >= labelStart + scopeNameLen) {
+               nextDot = labelStart + scopeNameLen;
+            }
+
+            if (!StrBuf_putsn(s, w, labelStart + strlen(str_snap_scope_prefix), nextDot - (labelStart + strlen(str_snap_scope_prefix))))
+               return false;
+
+            cgroup = nextSlash;
+
             continue;
          }
 

linux/LinuxProcess.c

@@ -57,8 +57,8 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [M_DRS] = { .name = "M_DRS", .title = " DATA ", .description = "Size of the data segment plus stack usage of the process", .flags = 0, .defaultSortDesc = true, },
    [M_LRS] = { .name = "M_LRS", .title = "  LIB ", .description = "The library size of the process (calculated from memory maps)", .flags = PROCESS_FLAG_LINUX_LRS_FIX, .defaultSortDesc = true, },
    [ST_UID] = { .name = "ST_UID", .title = "UID", .description = "User ID of the process owner", .flags = 0, },
-   [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, .defaultSortDesc = true, },
-   [PERCENT_NORM_CPU] = { .name = "PERCENT_NORM_CPU", .title = "NCPU%", .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)", .flags = 0, .defaultSortDesc = true, },
+   [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = " CPU%", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, .defaultSortDesc = true, .autoWidth = true, },
+   [PERCENT_NORM_CPU] = { .name = "PERCENT_NORM_CPU", .title = "NCPU%", .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)", .flags = 0, .defaultSortDesc = true, .autoWidth = true, },
    [PERCENT_MEM] = { .name = "PERCENT_MEM", .title = "MEM% ", .description = "Percentage of the memory the process is using, based on resident memory size", .flags = 0, .defaultSortDesc = true, },
    [USER] = { .name = "USER", .title = "USER       ", .description = "Username of the process owner (or user ID if name cannot be determined)", .flags = 0, },
    [TIME] = { .name = "TIME", .title = "  TIME+  ", .description = "Total time the process has spent in user and system time", .flags = 0, .defaultSortDesc = true, },
@@ -81,8 +81,8 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [IO_READ_RATE] = { .name = "IO_READ_RATE", .title = " DISK READ  ", .description = "The I/O rate of read(2) in bytes per second for the process", .flags = PROCESS_FLAG_IO, .defaultSortDesc = true, },
    [IO_WRITE_RATE] = { .name = "IO_WRITE_RATE", .title = " DISK WRITE ", .description = "The I/O rate of write(2) in bytes per second for the process", .flags = PROCESS_FLAG_IO, .defaultSortDesc = true, },
    [IO_RATE] = { .name = "IO_RATE", .title = "   DISK R/W ", .description = "Total I/O rate in bytes per second", .flags = PROCESS_FLAG_IO, .defaultSortDesc = true, },
-   [CGROUP] = { .name = "CGROUP", .title = "CGROUP (raw)                        ", .description = "Which cgroup the process is in", .flags = PROCESS_FLAG_LINUX_CGROUP, },
-   [CCGROUP] = { .name = "CCGROUP", .title = "CGROUP (compressed)                 ", .description = "Which cgroup the process is in (condensed to essentials)", .flags = PROCESS_FLAG_LINUX_CGROUP, },
+   [CGROUP] = { .name = "CGROUP", .title = "CGROUP (raw)", .description = "Which cgroup the process is in", .flags = PROCESS_FLAG_LINUX_CGROUP, .autoWidth = true, },
+   [CCGROUP] = { .name = "CCGROUP", .title = "CGROUP (compressed)", .description = "Which cgroup the process is in (condensed to essentials)", .flags = PROCESS_FLAG_LINUX_CGROUP, .autoWidth = true, },
    [OOM] = { .name = "OOM", .title = " OOM ", .description = "OOM (Out-of-Memory) killer score", .flags = PROCESS_FLAG_LINUX_OOM, .defaultSortDesc = true, },
    [IO_PRIORITY] = { .name = "IO_PRIORITY", .title = "IO ", .description = "I/O priority", .flags = PROCESS_FLAG_LINUX_IOPRIO, },
 #ifdef HAVE_DELAYACCT
@@ -94,7 +94,7 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [M_SWAP] = { .name = "M_SWAP", .title = " SWAP ", .description = "Size of the process's swapped pages", .flags = PROCESS_FLAG_LINUX_SMAPS, .defaultSortDesc = true, },
    [M_PSSWP] = { .name = "M_PSSWP", .title = " PSSWP ", .description = "shows proportional swap share of this mapping, unlike \"Swap\", this does not take into account swapped out page of underlying shmem objects", .flags = PROCESS_FLAG_LINUX_SMAPS, .defaultSortDesc = true, },
    [CTXT] = { .name = "CTXT", .title = " CTXT ", .description = "Context switches (incremental sum of voluntary_ctxt_switches and nonvoluntary_ctxt_switches)", .flags = PROCESS_FLAG_LINUX_CTXT, .defaultSortDesc = true, },
-   [SECATTR] = { .name = "SECATTR", .title = "Security Attribute             ", .description = "Security attribute of the process (e.g. SELinux or AppArmor)", .flags = PROCESS_FLAG_LINUX_SECATTR, },
+   [SECATTR] = { .name = "SECATTR", .title = "Security Attribute", .description = "Security attribute of the process (e.g. SELinux or AppArmor)", .flags = PROCESS_FLAG_LINUX_SECATTR, .autoWidth = true, },
    [PROC_COMM] = { .name = "COMM", .title = "COMM            ", .description = "comm string of the process from /proc/[pid]/comm", .flags = 0, },
    [PROC_EXE] = { .name = "EXE", .title = "EXE             ", .description = "Basename of exe of the process from /proc/[pid]/exe", .flags = 0, },
    [CWD] = { .name = "CWD", .title = "CWD                       ", .description = "The current working directory of the process", .flags = PROCESS_FLAG_CWD, },
@@ -248,8 +248,8 @@ static void LinuxProcess_writeField(const Process* this, RichString* str, Proces
    #ifdef HAVE_VSERVER
    case VXID: xSnprintf(buffer, n, "%5u ", lp->vxid); break;
    #endif
-   case CGROUP: xSnprintf(buffer, n, "%-35.35s ", lp->cgroup ? lp->cgroup : "N/A"); break;
-   case CCGROUP: xSnprintf(buffer, n, "%-35.35s ", lp->cgroup_short ? lp->cgroup_short : (lp->cgroup ? lp->cgroup : "N/A")); break;
+   case CGROUP: xSnprintf(buffer, n, "%-*.*s ", Process_fieldWidths[CGROUP], Process_fieldWidths[CGROUP], lp->cgroup ? lp->cgroup : "N/A"); break;
+   case CCGROUP: xSnprintf(buffer, n, "%-*.*s ", Process_fieldWidths[CCGROUP], Process_fieldWidths[CCGROUP], lp->cgroup_short ? lp->cgroup_short : (lp->cgroup ? lp->cgroup : "N/A")); break;
    case OOM: xSnprintf(buffer, n, "%4u ", lp->oom); break;
    case IO_PRIORITY: {
       int klass = IOPriority_class(lp->ioPriority);
@@ -270,9 +270,9 @@ static void LinuxProcess_writeField(const Process* this, RichString* str, Proces
       break;
    }
    #ifdef HAVE_DELAYACCT
-   case PERCENT_CPU_DELAY: Process_printPercentage(lp->cpu_delay_percent, buffer, n, &attr); break;
-   case PERCENT_IO_DELAY: Process_printPercentage(lp->blkio_delay_percent, buffer, n, &attr); break;
-   case PERCENT_SWAP_DELAY: Process_printPercentage(lp->swapin_delay_percent, buffer, n, &attr); break;
+   case PERCENT_CPU_DELAY: Process_printPercentage(lp->cpu_delay_percent, buffer, n, 5, &attr); break;
+   case PERCENT_IO_DELAY: Process_printPercentage(lp->blkio_delay_percent, buffer, n, 5, &attr); break;
+   case PERCENT_SWAP_DELAY: Process_printPercentage(lp->swapin_delay_percent, buffer, n, 5, &attr); break;
    #endif
    case CTXT:
       if (lp->ctxt_diff > 1000) {
@@ -280,7 +280,7 @@ static void LinuxProcess_writeField(const Process* this, RichString* str, Proces
       }
       xSnprintf(buffer, n, "%5lu ", lp->ctxt_diff);
       break;
-   case SECATTR: snprintf(buffer, n, "%-30.30s ", lp->secattr ? lp->secattr : "?"); break;
+   case SECATTR: snprintf(buffer, n, "%-*.*s ", Process_fieldWidths[SECATTR], Process_fieldWidths[SECATTR], lp->secattr ? lp->secattr : "N/A"); break;
    case AUTOGROUP_ID:
       if (lp->autogroup_id != -1) {
          xSnprintf(buffer, n, "%4ld ", lp->autogroup_id);

linux/LinuxProcessList.c

@@ -166,6 +166,28 @@ static void LinuxProcessList_initNetlinkSocket(LinuxProcessList* this) {
 
 #endif
 
+static unsigned int scanAvailableCPUsFromCPUinfo(LinuxProcessList* this) {
+   FILE* file = fopen(PROCCPUINFOFILE, "r");
+   if (file == NULL)
+      return this->super.existingCPUs;
+
+   unsigned int availableCPUs = 0;
+
+   while (!feof(file)) {
+      char buffer[PROC_LINE_LENGTH];
+
+      if (fgets(buffer, PROC_LINE_LENGTH, file) == NULL)
+         break;
+
+      if (String_startsWith(buffer, "processor"))
+         availableCPUs++;
+      }
+
+   fclose(file);
+
+   return availableCPUs ? availableCPUs : 1;
+}
+
 static void LinuxProcessList_updateCPUcount(ProcessList* super) {
    /* Similar to get_nprocs_conf(3) / _SC_NPROCESSORS_CONF
     * https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/getsysstats.c;hb=HEAD
@@ -174,21 +196,24 @@ static void LinuxProcessList_updateCPUcount(ProcessList* super) {
    LinuxProcessList* this = (LinuxProcessList*) super;
    unsigned int existing = 0, active = 0;
 
-   DIR* dir = opendir("/sys/devices/system/cpu");
-   if (!dir) {
-      this->cpuData = xReallocArrayZero(this->cpuData, super->existingCPUs ? (super->existingCPUs + 1) : 0, 2, sizeof(CPUData));
+   // Initialize the cpuData array before anything else.
+   if (!this->cpuData) {
+      this->cpuData = xCalloc(2, sizeof(CPUData));
       this->cpuData[0].online = true; /* average is always "online" */
       this->cpuData[1].online = true;
       super->activeCPUs = 1;
       super->existingCPUs = 1;
-      return;
    }
 
+   DIR* dir = opendir("/sys/devices/system/cpu");
+   if (!dir)
+      return;
+
    unsigned int currExisting = super->existingCPUs;
 
    const struct dirent* entry;
    while ((entry = readdir(dir)) != NULL) {
-      if (entry->d_type != DT_DIR)
+      if (entry->d_type != DT_DIR && entry->d_type != DT_UNKNOWN)
          continue;
 
       if (!String_startsWith(entry->d_name, "cpu"))
@@ -233,6 +258,16 @@ static void LinuxProcessList_updateCPUcount(ProcessList* super) {
 
    closedir(dir);
 
+   // return if no CPU is found
+   if (existing < 1)
+      return;
+
+   if (Running_containerized) {
+	   /* LXC munges /proc/cpuinfo but not the /sys/devices/system/cpu/ files,
+	    * so limit the visible CPUs to what the guest has been configured to see: */
+	   currExisting = active = scanAvailableCPUsFromCPUinfo(this);
+   }
+
 #ifdef HAVE_SENSORS_SENSORS_H
    /* When started with offline CPUs, libsensors does not monitor those,
     * even when they become online. */
@@ -241,7 +276,7 @@ static void LinuxProcessList_updateCPUcount(ProcessList* super) {
 #endif
 
    super->activeCPUs = active;
-   assert(existing == currExisting);
+   assert(Running_containerized || (existing == currExisting));
    super->existingCPUs = currExisting;
 }
 
@@ -493,6 +528,8 @@ static void LinuxProcessList_readIoFile(LinuxProcess* process, openat_arg_t proc
 
    unsigned long long last_read = process->io_read_bytes;
    unsigned long long last_write = process->io_write_bytes;
+   unsigned long long time_delta = realtimeMs > process->io_last_scan_time_ms ? realtimeMs - process->io_last_scan_time_ms : 0;
+
    char* buf = buffer;
    const char* line;
    while ((line = strsep(&buf, "\n")) != NULL) {
@@ -502,7 +539,7 @@ static void LinuxProcessList_readIoFile(LinuxProcess* process, openat_arg_t proc
             process->io_rchar = strtoull(line + 7, NULL, 10);
          } else if (String_startsWith(line + 1, "ead_bytes: ")) {
             process->io_read_bytes = strtoull(line + 12, NULL, 10);
-            process->io_rate_read_bps = (process->io_read_bytes - last_read) * /*ms to s*/1000 / (realtimeMs - process->io_last_scan_time_ms);
+            process->io_rate_read_bps = time_delta ? (process->io_read_bytes - last_read) * /*ms to s*/1000. / time_delta : NAN;
          }
          break;
       case 'w':
@@ -510,7 +547,7 @@ static void LinuxProcessList_readIoFile(LinuxProcess* process, openat_arg_t proc
             process->io_wchar = strtoull(line + 7, NULL, 10);
          } else if (String_startsWith(line + 1, "rite_bytes: ")) {
             process->io_write_bytes = strtoull(line + 13, NULL, 10);
-            process->io_rate_write_bps = (process->io_write_bytes - last_write) * /*ms to s*/1000 / (realtimeMs - process->io_last_scan_time_ms);
+            process->io_rate_write_bps = time_delta ? (process->io_write_bytes - last_write) * /*ms to s*/1000. / time_delta : NAN;
          }
          break;
       case 's':
@@ -900,16 +937,27 @@ static void LinuxProcessList_readCGroupFile(LinuxProcess* process, openat_arg_t
 
    bool changed = !process->cgroup || !String_eq(process->cgroup, output);
 
+   Process_updateFieldWidth(CGROUP, strlen(output));
    free_and_xStrdup(&process->cgroup, output);
 
-   if (!changed)
+   if (!changed) {
+      if(process->cgroup_short) {
+         Process_updateFieldWidth(CCGROUP, strlen(process->cgroup_short));
+      } else {
+         //CCGROUP is alias to normal CGROUP if shortening fails
+         Process_updateFieldWidth(CCGROUP, strlen(process->cgroup));
+      }
       return;
+   }
 
    char* cgroup_short = CGroup_filterName(process->cgroup);
    if (cgroup_short) {
+      Process_updateFieldWidth(CCGROUP, strlen(cgroup_short));
       free_and_xStrdup(&process->cgroup_short, cgroup_short);
       free(cgroup_short);
    } else {
+      //CCGROUP is alias to normal CGROUP if shortening fails
+      Process_updateFieldWidth(CCGROUP, strlen(process->cgroup));
       free(process->cgroup_short);
       process->cgroup_short = NULL;
    }
@@ -1027,6 +1075,9 @@ static void LinuxProcessList_readSecattrData(LinuxProcess* process, openat_arg_t
    if (newline) {
       *newline = '\0';
    }
+
+   Process_updateFieldWidth(SECATTR, strlen(buffer));
+
    if (process->secattr && String_eq(process->secattr, buffer)) {
       return;
    }
@@ -1300,7 +1351,8 @@ static bool LinuxProcessList_readCmdlineFile(Process* process, openat_arg_t proc
             if (process->procExeDeleted)
                filename[filenameLen - markerLen] = '\0';
 
-            process->mergedCommand.exeChanged |= oldExeDeleted ^ process->procExeDeleted;
+            if (oldExeDeleted != process->procExeDeleted)
+               process->mergedCommand.lastUpdate = 0;
          }
 
          Process_updateExe(process, filename);
@@ -1366,10 +1418,26 @@ static char* LinuxProcessList_updateTtyDevice(TtyDriver* ttyDrivers, unsigned lo
    return out;
 }
 
+static bool isOlderThan(const ProcessList* pl, const Process* proc, unsigned int seconds) {
+   assert(pl->realtimeMs > 0);
+
+   /* Starttime might not yet be parsed */
+   if (proc->starttime_ctime <= 0)
+	   return false;
+
+   uint64_t realtime = pl->realtimeMs / 1000;
+
+   if (realtime < (uint64_t)proc->starttime_ctime)
+      return false;
+
+   return realtime - proc->starttime_ctime > seconds;
+}
+
 static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_t parentFd, const char* dirname, const Process* parent, double period) {
    ProcessList* pl = (ProcessList*) this;
    const struct dirent* entry;
    const Settings* settings = pl->settings;
+   const ScreenSettings* ss = settings->ss;
 
 #ifdef HAVE_OPENAT
    int dirFd = openat(parentFd, dirname, O_RDONLY | O_DIRECTORY | O_NOFOLLOW);
@@ -1422,6 +1490,15 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
       if (parent && pid == parent->pid)
          continue;
 
+#ifdef HAVE_OPENAT
+      int procFd = openat(dirFd, entry->d_name, O_RDONLY | O_DIRECTORY | O_NOFOLLOW);
+      if (procFd < 0)
+         continue;
+#else
+      char procFd[4096];
+      xSnprintf(procFd, sizeof(procFd), "%s/%s", dirFd, entry->d_name);
+#endif
+
       bool preExisting;
       Process* proc = ProcessList_getProcess(pl, pid, &preExisting, LinuxProcess_new);
       LinuxProcess* lp = (LinuxProcess*) proc;
@@ -1429,15 +1506,6 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
       proc->tgid = parent ? parent->pid : pid;
       proc->isUserlandThread = proc->pid != proc->tgid;
 
-#ifdef HAVE_OPENAT
-      int procFd = openat(dirFd, entry->d_name, O_RDONLY | O_DIRECTORY | O_NOFOLLOW);
-      if (procFd < 0)
-         goto errorReadingProcess;
-#else
-      char procFd[4096];
-      xSnprintf(procFd, sizeof(procFd), "%s/%s", dirFd, entry->d_name);
-#endif
-
       LinuxProcessList_recurseProcTree(this, procFd, "task", proc, period);
 
       /*
@@ -1463,7 +1531,7 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
          continue;
       }
 
-      if (settings->flags & PROCESS_FLAG_IO)
+      if (ss->flags & PROCESS_FLAG_IO)
          LinuxProcessList_readIoFile(lp, procFd, pl->realtimeMs);
 
       if (!LinuxProcessList_readStatmFile(lp, procFd))
@@ -1472,8 +1540,9 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
       {
          bool prev = proc->usesDeletedLib;
 
-         if ((settings->flags & PROCESS_FLAG_LINUX_LRS_FIX) ||
-             (settings->highlightDeletedExe && !proc->procExeDeleted && !proc->isKernelThread && !proc->isUserlandThread)) {
+         if (!proc->isKernelThread && !proc->isUserlandThread &&
+            ((ss->flags & PROCESS_FLAG_LINUX_LRS_FIX) || (settings->highlightDeletedExe && !proc->procExeDeleted && isOlderThan(pl, proc, 10)))) {
+
             // Check if we really should recalculate the M_LRS value for this process
             uint64_t passedTimeInMs = pl->realtimeMs - lp->last_mlrs_calctime;
 
@@ -1481,17 +1550,19 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
 
             if (passedTimeInMs > recheck) {
                lp->last_mlrs_calctime = pl->realtimeMs;
-               LinuxProcessList_readMaps(lp, procFd, settings->flags & PROCESS_FLAG_LINUX_LRS_FIX, settings->highlightDeletedExe);
+               LinuxProcessList_readMaps(lp, procFd, ss->flags & PROCESS_FLAG_LINUX_LRS_FIX, settings->highlightDeletedExe);
             }
          } else {
             /* Copy from process structure in threads and reset if setting got disabled */
             proc->usesDeletedLib = (proc->isUserlandThread && parent) ? parent->usesDeletedLib : false;
+            lp->m_lrs = (proc->isUserlandThread && parent) ? ((const LinuxProcess*)parent)->m_lrs : 0;
          }
 
-         proc->mergedCommand.exeChanged |= prev ^ proc->usesDeletedLib;
+         if (prev != proc->usesDeletedLib)
+            proc->mergedCommand.lastUpdate = 0;
       }
 
-      if ((settings->flags & PROCESS_FLAG_LINUX_SMAPS) && !Process_isKernelThread(proc)) {
+      if ((ss->flags & PROCESS_FLAG_LINUX_SMAPS) && !Process_isKernelThread(proc)) {
          if (!parent) {
             // Read smaps file of each process only every second pass to improve performance
             static int smaps_flag = 0;
@@ -1521,7 +1592,7 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
          proc->tty_name = LinuxProcessList_updateTtyDevice(this->ttyDrivers, proc->tty_nr);
       }
 
-      if (settings->flags & PROCESS_FLAG_LINUX_IOPRIO) {
+      if (ss->flags & PROCESS_FLAG_LINUX_IOPRIO) {
          LinuxProcess_updateIOPriority(lp);
       }
 
@@ -1529,6 +1600,7 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
       float percent_cpu = (period < 1E-6) ? 0.0F : ((lp->utime + lp->stime - lasttimes) / period * 100.0);
       proc->percent_cpu = CLAMP(percent_cpu, 0.0F, activeCPUs * 100.0F);
       proc->percent_mem = proc->m_resident / (double)(pl->totalMem) * 100.0;
+      Process_updateCPUFieldWidths(proc->percent_cpu);
 
       if (! LinuxProcessList_updateUser(pl, proc, procFd))
          goto errorReadingProcess;
@@ -1536,13 +1608,13 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
       if (!preExisting) {
 
          #ifdef HAVE_OPENVZ
-         if (settings->flags & PROCESS_FLAG_LINUX_OPENVZ) {
+         if (ss->flags & PROCESS_FLAG_LINUX_OPENVZ) {
             LinuxProcessList_readOpenVZData(lp, procFd);
          }
          #endif
 
          #ifdef HAVE_VSERVER
-         if (settings->flags & PROCESS_FLAG_LINUX_VSERVER) {
+         if (ss->flags & PROCESS_FLAG_LINUX_VSERVER) {
             LinuxProcessList_readVServerData(lp, procFd);
          }
          #endif
@@ -1567,32 +1639,32 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
       }
 
       #ifdef HAVE_DELAYACCT
-      if (settings->flags & PROCESS_FLAG_LINUX_DELAYACCT) {
+      if (ss->flags & PROCESS_FLAG_LINUX_DELAYACCT) {
          LinuxProcessList_readDelayAcctData(this, lp);
       }
       #endif
 
-      if (settings->flags & PROCESS_FLAG_LINUX_CGROUP) {
+      if (ss->flags & PROCESS_FLAG_LINUX_CGROUP) {
          LinuxProcessList_readCGroupFile(lp, procFd);
       }
 
-      if (settings->flags & PROCESS_FLAG_LINUX_OOM) {
+      if (ss->flags & PROCESS_FLAG_LINUX_OOM) {
          LinuxProcessList_readOomData(lp, procFd);
       }
 
-      if (settings->flags & PROCESS_FLAG_LINUX_CTXT) {
+      if (ss->flags & PROCESS_FLAG_LINUX_CTXT) {
          LinuxProcessList_readCtxtData(lp, procFd);
       }
 
-      if (settings->flags & PROCESS_FLAG_LINUX_SECATTR) {
+      if (ss->flags & PROCESS_FLAG_LINUX_SECATTR) {
          LinuxProcessList_readSecattrData(lp, procFd);
       }
 
-      if (settings->flags & PROCESS_FLAG_CWD) {
+      if (ss->flags & PROCESS_FLAG_CWD) {
          LinuxProcessList_readCwd(lp, procFd);
       }
 
-      if ((settings->flags & PROCESS_FLAG_LINUX_AUTOGROUP) && this->haveAutogroup) {
+      if ((ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP) && this->haveAutogroup) {
          LinuxProcessList_readAutogroup(lp, procFd);
       }
 
@@ -1626,8 +1698,13 @@ errorReadingProcess:
 #endif
 
          if (preExisting) {
-            ProcessList_remove(pl, proc);
+            /*
+             * The only real reason for coming here (apart from Linux violating the /proc API)
+             * would be the process going away with its /proc files disappearing (!HAVE_OPENAT).
+             * However, we want to keep in the process list for now for the "highlight dying" mode.
+             */
          } else {
+            /* A really short-lived process that we don't have full info about */
             Process_delete((Object*)proc);
          }
       }
@@ -1847,6 +1924,7 @@ static inline void LinuxProcessList_scanZfsArcstats(LinuxProcessList* lpl) {
 
       switch (buffer[0]) {
       case 'c':
+         tryRead("c_min", &lpl->zfs.min);
          tryRead("c_max", &lpl->zfs.max);
          tryReadFlag("compressed_size", &lpl->zfs.compressed, lpl->zfs.isCompressed);
          break;
@@ -1881,6 +1959,7 @@ static inline void LinuxProcessList_scanZfsArcstats(LinuxProcessList* lpl) {
 
    lpl->zfs.enabled = (lpl->zfs.size > 0 ? 1 : 0);
    lpl->zfs.size    /= 1024;
+   lpl->zfs.min    /= 1024;
    lpl->zfs.max    /= 1024;
    lpl->zfs.MFU    /= 1024;
    lpl->zfs.MRU    /= 1024;
@@ -1994,7 +2073,7 @@ static inline double LinuxProcessList_scanCPUTime(ProcessList* super) {
    return period;
 }
 
-static int scanCPUFreqencyFromSysCPUFreq(LinuxProcessList* this) {
+static int scanCPUFrequencyFromSysCPUFreq(LinuxProcessList* this) {
    unsigned int existingCPUs = this->super.existingCPUs;
    int numCPUsWithFrequency = 0;
    unsigned long totalFrequency = 0;
@@ -2057,7 +2136,7 @@ static int scanCPUFreqencyFromSysCPUFreq(LinuxProcessList* this) {
    return 0;
 }
 
-static void scanCPUFreqencyFromCPUinfo(LinuxProcessList* this) {
+static void scanCPUFrequencyFromCPUinfo(LinuxProcessList* this) {
    FILE* file = fopen(PROCCPUINFOFILE, "r");
    if (file == NULL)
       return;
@@ -2074,15 +2153,10 @@ static void scanCPUFreqencyFromCPUinfo(LinuxProcessList* this) {
       if (fgets(buffer, PROC_LINE_LENGTH, file) == NULL)
          break;
 
-      if (
-         (sscanf(buffer, "processor : %d", &cpuid) == 1) ||
-         (sscanf(buffer, "processor: %d", &cpuid) == 1)
-      ) {
+      if (sscanf(buffer, "processor : %d", &cpuid) == 1) {
          continue;
       } else if (
          (sscanf(buffer, "cpu MHz : %lf", &frequency) == 1) ||
-         (sscanf(buffer, "cpu MHz: %lf", &frequency) == 1) ||
-         (sscanf(buffer, "clock : %lfMHz", &frequency) == 1) ||
          (sscanf(buffer, "clock : %lfMHz", &frequency) == 1)
       ) {
          if (cpuid < 0 || (unsigned int)cpuid > (existingCPUs - 1)) {
@@ -2114,11 +2188,11 @@ static void LinuxProcessList_scanCPUFrequency(LinuxProcessList* this) {
       this->cpuData[i].frequency = NAN;
    }
 
-   if (scanCPUFreqencyFromSysCPUFreq(this) == 0) {
+   if (scanCPUFrequencyFromSysCPUFreq(this) == 0) {
       return;
    }
 
-   scanCPUFreqencyFromCPUinfo(this);
+   scanCPUFrequencyFromCPUinfo(this);
 }
 
 void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
@@ -2146,7 +2220,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
       return;
    }
 
-   if (settings->flags & PROCESS_FLAG_LINUX_AUTOGROUP) {
+   if (settings->ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP) {
       // Refer to sched(7) 'autogroup feature' section
       // The kernel feature can be enabled/disabled through procfs at
       // any time, so check for it at the start of each sample - only

linux/Platform.c

@@ -49,6 +49,8 @@ in the source distribution for its full text.
 #include "SysArchMeter.h"
 #include "TasksMeter.h"
 #include "UptimeMeter.h"
+#include "FreqMeter.h"
+#include "TempMeter.h"
 #include "XUtils.h"
 #include "linux/IOPriority.h"
 #include "linux/IOPriorityPanel.h"
@@ -70,16 +72,35 @@ in the source distribution for its full text.
 #include "LibSensors.h"
 #endif
 
+#ifndef O_PATH
+#define O_PATH 010000000 // declare for ancient glibc versions
+#endif
 
 #ifdef HAVE_LIBCAP
-enum CapMode {
+enum CapMode
+{
    CAP_MODE_OFF,
    CAP_MODE_BASIC,
    CAP_MODE_STRICT
 };
 #endif
 
-const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, M_SHARE, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+bool Running_containerized = false;
+
+const ScreenDefaults Platform_defaultScreens[] = {
+    {
+        .name = "Main",
+        .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT M_SHARE STATE PERCENT_CPU PERCENT_MEM TIME Command",
+        .sortKey = "PERCENT_CPU",
+    },
+    {
+        .name = "I/O",
+        .columns = "PID USER IO_PRIORITY IO_RATE IO_READ_RATE IO_WRITE_RATE PERCENT_SWAP_DELAY PERCENT_IO_DELAY Command",
+        .sortKey = "IO_RATE",
+    },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
 
 const SignalItem Platform_signals[] = {
     {.name = " 0 Cancel", .number = 0},
@@ -120,7 +141,9 @@ const SignalItem Platform_signals[] = {
 
 const unsigned int Platform_numberOfSignals = ARRAYSIZE(Platform_signals);
 
-static enum { BAT_PROC, BAT_SYS, BAT_ERR } Platform_Battery_method = BAT_PROC;
+static enum { BAT_PROC,
+              BAT_SYS,
+              BAT_ERR } Platform_Battery_method = BAT_PROC;
 static time_t Platform_Battery_cacheTime;
 static double Platform_Battery_cachePercent = NAN;
 static ACPresence Platform_Battery_cacheIsOnAC;
@@ -129,7 +152,8 @@ static ACPresence Platform_Battery_cacheIsOnAC;
 static enum CapMode Platform_capabilitiesMode = CAP_MODE_BASIC;
 #endif
 
-static Htop_Reaction Platform_actionSetIOPriority(State* st) {
+static Htop_Reaction Platform_actionSetIOPriority(State *st)
+{
    if (Settings_isReadonly())
       return HTOP_OK;
 
@@ -140,10 +164,12 @@ static Htop_Reaction Platform_actionSetIOPriority(State* st) {
    IOPriority ioprio1 = p->ioPriority;
    Panel *ioprioPanel = IOPriorityPanel_new(ioprio1);
    const void *set = Action_pickFromVector(st, ioprioPanel, 20, true);
-   if (set) {
+   if (set)
+   {
       IOPriority ioprio2 = IOPriorityPanel_getIOPriority(ioprioPanel);
       bool ok = MainPanel_foreachProcess(st->mainPanel, LinuxProcess_setIOPriority, (Arg){.i = ioprio2}, NULL);
-      if (!ok) {
+      if (!ok)
+      {
          beep();
       }
    }
@@ -151,8 +177,10 @@ static Htop_Reaction Platform_actionSetIOPriority(State* st) {
    return HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
 }
 
-static bool Platform_changeAutogroupPriority(MainPanel* panel, int delta) {
-   if (LinuxProcess_isAutogroupEnabled() == false) {
+static bool Platform_changeAutogroupPriority(MainPanel *panel, int delta)
+{
+   if (LinuxProcess_isAutogroupEnabled() == false)
+   {
       beep();
       return false;
    }
@@ -163,7 +191,8 @@ static bool Platform_changeAutogroupPriority(MainPanel* panel, int delta) {
    return anyTagged;
 }
 
-static Htop_Reaction Platform_actionHigherAutogroupPriority(State* st) {
+static Htop_Reaction Platform_actionHigherAutogroupPriority(State *st)
+{
    if (Settings_isReadonly())
       return HTOP_OK;
 
@@ -171,7 +200,8 @@ static Htop_Reaction Platform_actionHigherAutogroupPriority(State* st) {
    return changed ? HTOP_REFRESH : HTOP_OK;
 }
 
-static Htop_Reaction Platform_actionLowerAutogroupPriority(State* st) {
+static Htop_Reaction Platform_actionLowerAutogroupPriority(State *st)
+{
    if (Settings_isReadonly())
       return HTOP_OK;
 
@@ -179,7 +209,8 @@ static Htop_Reaction Platform_actionLowerAutogroupPriority(State* st) {
    return changed ? HTOP_REFRESH : HTOP_OK;
 }
 
-void Platform_setBindings(Htop_Action* keys) {
+void Platform_setBindings(Htop_Action *keys)
+{
    keys['i'] = Platform_actionSetIOPriority;
    keys['{'] = Platform_actionLowerAutogroupPriority;
    keys['}'] = Platform_actionHigherAutogroupPriority;
@@ -201,6 +232,8 @@ const MeterClass* const Platform_meterTypes[] = {
     &HugePageMeter_class,
     &TasksMeter_class,
     &UptimeMeter_class,
+    &FreqMeter_class,
+    &TempMeter_class,
     &BatteryMeter_class,
     &HostnameMeter_class,
     &AllCPUsMeter_class,
@@ -228,23 +261,78 @@ const MeterClass* const Platform_meterTypes[] = {
     &NetworkIOMeter_class,
     &SELinuxMeter_class,
     &SystemdMeter_class,
-   NULL
-};
+    NULL};
 
-int Platform_getUptime() {
+int Platform_getUptime()
+{
    double uptime = 0;
    FILE *fd = fopen(PROCDIR "/uptime", "r");
-   if (fd) {
+   if (fd)
+   {
       int n = fscanf(fd, "%64lf", &uptime);
       fclose(fd);
-      if (n <= 0) {
+      if (n <= 0)
+      {
          return 0;
       }
    }
    return floor(uptime);
 }
 
-void Platform_getLoadAverage(double* one, double* five, double* fifteen) {
+float Platform_getTemp()
+{
+   float ftemp = 0;
+
+   FILE *fd = fopen("/sys/class/thermal/thermal_zone0/temp", "r");
+   if (!fd)
+   {
+      return ftemp;
+   }
+
+   int itemp = 0;
+   fscanf(fd, "%d", &itemp);
+   ftemp = itemp;
+
+   if (ftemp >= 1000)
+   {
+      ftemp /= 1000;
+   }
+
+   fclose(fd);
+
+   return ftemp;
+}
+
+float Platform_getFreq()
+{
+   float freq = 0;
+
+   FILE *fd = fopen("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq", "r");
+   if (!fd)
+   {
+      return freq;
+   }
+
+   int ifreq = 0;
+   fscanf(fd, "%d", &ifreq);
+   freq = ifreq;
+
+   fclose(fd);
+
+   if (freq < 10)
+   {
+      freq *= 1000000;
+   }
+   else
+   {
+      freq /= 1000000;
+   }
+
+   return freq;
+}
+
+void Platform_getLoadAverage(double *one, double *five, double *fifteen)
+{
    FILE *fd = fopen(PROCDIR "/loadavg", "r");
    if (!fd)
       goto err;
@@ -266,7 +354,8 @@ err:
    *fifteen = NAN;
 }
 
-int Platform_getMaxPid() {
+int Platform_getMaxPid()
+{
    FILE *file = fopen(PROCDIR "/sys/kernel/pid_max", "r");
    if (!file)
       return -1;
@@ -278,21 +367,24 @@ int Platform_getMaxPid() {
    return maxPid;
 }
 
-double Platform_setCPUValues(Meter* this, unsigned int cpu) {
+double Platform_setCPUValues(Meter *this, unsigned int cpu)
+{
    const LinuxProcessList *pl = (const LinuxProcessList *)this->pl;
    const CPUData *cpuData = &(pl->cpuData[cpu]);
    double total = (double)(cpuData->totalPeriod == 0 ? 1 : cpuData->totalPeriod);
    double percent;
    double *v = this->values;
 
-   if (!cpuData->online) {
+   if (!cpuData->online)
+   {
       this->curItems = 0;
       return NAN;
    }
 
    v[CPU_METER_NICE] = cpuData->nicePeriod / total * 100.0;
    v[CPU_METER_NORMAL] = cpuData->userPeriod / total * 100.0;
-   if (this->pl->settings->detailedCPUTime) {
+   if (this->pl->settings->detailedCPUTime)
+   {
       v[CPU_METER_KERNEL] = cpuData->systemPeriod / total * 100.0;
       v[CPU_METER_IRQ] = cpuData->irqPeriod / total * 100.0;
       v[CPU_METER_SOFTIRQ] = cpuData->softIrqPeriod / total * 100.0;
@@ -300,19 +392,25 @@ double Platform_setCPUValues(Meter* this, unsigned int cpu) {
       v[CPU_METER_GUEST] = cpuData->guestPeriod / total * 100.0;
       v[CPU_METER_IOWAIT] = cpuData->ioWaitPeriod / total * 100.0;
       this->curItems = 8;
-      if (this->pl->settings->accountGuestInCPUMeter) {
+      if (this->pl->settings->accountGuestInCPUMeter)
+      {
          percent = v[0] + v[1] + v[2] + v[3] + v[4] + v[5] + v[6];
-      } else {
+      }
+      else
+      {
          percent = v[0] + v[1] + v[2] + v[3] + v[4];
       }
-   } else {
+   }
+   else
+   {
       v[2] = cpuData->systemAllPeriod / total * 100.0;
       v[3] = (cpuData->stealPeriod + cpuData->guestPeriod) / total * 100.0;
       this->curItems = 4;
       percent = v[0] + v[1] + v[2] + v[3];
    }
    percent = CLAMP(percent, 0.0, 100.0);
-   if (isnan(percent)) {
+   if (isnan(percent))
+   {
       percent = 0.0;
    }
 
@@ -327,7 +425,8 @@ double Platform_setCPUValues(Meter* this, unsigned int cpu) {
    return percent;
 }
 
-void Platform_setMemoryValues(Meter* this) {
+void Platform_setMemoryValues(Meter *this)
+{
    const ProcessList *pl = this->pl;
    const LinuxProcessList *lpl = (const LinuxProcessList *)pl;
 
@@ -338,39 +437,50 @@ void Platform_setMemoryValues(Meter* this) {
    this->values[3] = pl->cachedMem;
    this->values[4] = pl->availableMem;
 
-   if (lpl->zfs.enabled != 0) {
-      this->values[0] -= lpl->zfs.size;
-      this->values[3] += lpl->zfs.size;
+   if (lpl->zfs.enabled != 0 && !Running_containerized)
+   {
+      // ZFS does not shrink below the value of zfs_arc_min.
+      unsigned long long int shrinkableSize = 0;
+      if (lpl->zfs.size > lpl->zfs.min)
+         shrinkableSize = lpl->zfs.size - lpl->zfs.min;
+      this->values[0] -= shrinkableSize;
+      this->values[3] += shrinkableSize;
+      this->values[4] += shrinkableSize;
    }
 }
 
-void Platform_setSwapValues(Meter* this) {
+void Platform_setSwapValues(Meter *this)
+{
    const ProcessList *pl = this->pl;
    this->total = pl->totalSwap;
    this->values[0] = pl->usedSwap;
    this->values[1] = pl->cachedSwap;
 }
 
-void Platform_setZramValues(Meter* this) {
+void Platform_setZramValues(Meter *this)
+{
    const LinuxProcessList *lpl = (const LinuxProcessList *)this->pl;
    this->total = lpl->zram.totalZram;
    this->values[0] = lpl->zram.usedZramComp;
    this->values[1] = lpl->zram.usedZramOrig;
 }
 
-void Platform_setZfsArcValues(Meter* this) {
+void Platform_setZfsArcValues(Meter *this)
+{
    const LinuxProcessList *lpl = (const LinuxProcessList *)this->pl;
 
    ZfsArcMeter_readStats(this, &(lpl->zfs));
 }
 
-void Platform_setZfsCompressedArcValues(Meter* this) {
+void Platform_setZfsCompressedArcValues(Meter *this)
+{
    const LinuxProcessList *lpl = (const LinuxProcessList *)this->pl;
 
    ZfsCompressedArcMeter_readStats(this, &(lpl->zfs));
 }
 
-char* Platform_getProcessEnv(pid_t pid) {
+char *Platform_getProcessEnv(pid_t pid)
+{
    char procname[128];
    xSnprintf(procname, sizeof(procname), PROCDIR "/%d/environ", pid);
    FILE *fd = fopen(procname, "r");
@@ -383,7 +493,8 @@ char* Platform_getProcessEnv(pid_t pid) {
    size_t size = 0;
    ssize_t bytes = 0;
 
-   do {
+   do
+   {
       size += bytes;
       capacity += 4096;
       env = xRealloc(env, capacity);
@@ -391,7 +502,8 @@ char* Platform_getProcessEnv(pid_t pid) {
 
    fclose(fd);
 
-   if (bytes < 0) {
+   if (bytes < 0)
+   {
       free(env);
       return NULL;
    }
@@ -412,7 +524,8 @@ char* Platform_getProcessEnv(pid_t pid) {
  * Based on implementation of lslocks from util-linux:
  * https://sources.debian.org/src/util-linux/2.36-3/misc-utils/lslocks.c/#L162
  */
-char* Platform_getInodeFilename(pid_t pid, ino_t inode) {
+char *Platform_getInodeFilename(pid_t pid, ino_t inode)
+{
    struct stat sb;
    const struct dirent *de;
    DIR *dirp;
@@ -436,7 +549,8 @@ char* Platform_getInodeFilename(pid_t pid, ino_t inode) {
    if ((fd = dirfd(dirp)) < 0)
       goto out;
 
-   while ((de = readdir(dirp))) {
+   while ((de = readdir(dirp)))
+   {
       if (String_eq(de->d_name, ".") || String_eq(de->d_name, ".."))
          continue;
 
@@ -461,18 +575,21 @@ out:
    return ret;
 }
 
-FileLocks_ProcessData* Platform_getProcessLocks(pid_t pid) {
+FileLocks_ProcessData *Platform_getProcessLocks(pid_t pid)
+{
    FileLocks_ProcessData *pdata = xCalloc(1, sizeof(FileLocks_ProcessData));
 
    FILE *f = fopen(PROCDIR "/locks", "r");
-   if (!f) {
+   if (!f)
+   {
       pdata->error = true;
       return pdata;
    }
 
    char buffer[1024];
    FileLocks_LockData **data_ref = &pdata->locks;
-   while(fgets(buffer, sizeof(buffer), f)) {
+   while (fgets(buffer, sizeof(buffer), f))
+   {
       if (!strchr(buffer, '\n'))
          continue;
 
@@ -506,9 +623,12 @@ FileLocks_ProcessData* Platform_getProcessLocks(pid_t pid) {
       data->dev[1] = lock_dev[1];
       data->inode = lock_inode;
       data->start = strtoull(lock_start, NULL, 10);
-      if (!String_eq(lock_end, "EOF")) {
+      if (!String_eq(lock_end, "EOF"))
+      {
          data->end = strtoull(lock_end, NULL, 10);
-      } else {
+      }
+      else
+      {
          data->end = ULLONG_MAX;
       }
 
@@ -520,17 +640,20 @@ FileLocks_ProcessData* Platform_getProcessLocks(pid_t pid) {
    return pdata;
 }
 
-void Platform_getPressureStall(const char* file, bool some, double* ten, double* sixty, double* threehundred) {
+void Platform_getPressureStall(const char *file, bool some, double *ten, double *sixty, double *threehundred)
+{
    *ten = *sixty = *threehundred = 0;
    char procname[128];
    xSnprintf(procname, sizeof(procname), PROCDIR "/pressure/%s", file);
    FILE *fd = fopen(procname, "r");
-   if (!fd) {
+   if (!fd)
+   {
       *ten = *sixty = *threehundred = NAN;
       return;
    }
    int total = fscanf(fd, "some avg10=%32lf avg60=%32lf avg300=%32lf total=%*f ", ten, sixty, threehundred);
-   if (!some) {
+   if (!some)
+   {
       total = fscanf(fd, "full avg10=%32lf avg60=%32lf avg300=%32lf total=%*f ", ten, sixty, threehundred);
    }
    (void)total;
@@ -538,7 +661,8 @@ void Platform_getPressureStall(const char* file, bool some, double* ten, double*
    fclose(fd);
 }
 
-bool Platform_getDiskIO(DiskIOData* data) {
+bool Platform_getDiskIO(DiskIOData *data)
+{
    FILE *fd = fopen(PROCDIR "/diskstats", "r");
    if (!fd)
       return false;
@@ -547,10 +671,12 @@ bool Platform_getDiskIO(DiskIOData* data) {
 
    unsigned long long int read_sum = 0, write_sum = 0, timeSpend_sum = 0;
    char lineBuffer[256];
-   while (fgets(lineBuffer, sizeof(lineBuffer), fd)) {
+   while (fgets(lineBuffer, sizeof(lineBuffer), fd))
+   {
       char diskname[32];
       unsigned long long int read_tmp, write_tmp, timeSpend_tmp;
-      if (sscanf(lineBuffer, "%*d %*d %31s %*u %*u %llu %*u %*u %*u %llu %*u %*u %llu", diskname, &read_tmp, &write_tmp, &timeSpend_tmp) == 4) {
+      if (sscanf(lineBuffer, "%*d %*d %31s %*u %*u %llu %*u %*u %*u %llu %*u %*u %llu", diskname, &read_tmp, &write_tmp, &timeSpend_tmp) == 4)
+      {
          if (String_startsWith(diskname, "dm-"))
             continue;
 
@@ -577,14 +703,16 @@ bool Platform_getDiskIO(DiskIOData* data) {
    return true;
 }
 
-bool Platform_getNetworkIO(NetworkIOData* data) {
+bool Platform_getNetworkIO(NetworkIOData *data)
+{
    FILE *fd = fopen(PROCDIR "/net/dev", "r");
    if (!fd)
       return false;
 
    memset(data, 0, sizeof(NetworkIOData));
    char lineBuffer[512];
-   while (fgets(lineBuffer, sizeof(lineBuffer), fd)) {
+   while (fgets(lineBuffer, sizeof(lineBuffer), fd))
+   {
       char interfaceName[32];
       unsigned long long int bytesReceived, packetsReceived, bytesTransmitted, packetsTransmitted;
       if (sscanf(lineBuffer, "%31s %llu %llu %*u %*u %*u %*u %*u %*u %llu %llu",
@@ -620,7 +748,8 @@ bool Platform_getNetworkIO(NetworkIOData* data) {
 // READ FROM /proc
 // ----------------------------------------
 
-static double Platform_Battery_getProcBatInfo(void) {
+static double Platform_Battery_getProcBatInfo(void)
+{
    DIR *batteryDir = opendir(PROC_BATTERY_DIR);
    if (!batteryDir)
       return NAN;
@@ -629,7 +758,8 @@ static double Platform_Battery_getProcBatInfo(void) {
    uint64_t totalRemain = 0;
 
    struct dirent *dirEntry = NULL;
-   while ((dirEntry = readdir(batteryDir))) {
+   while ((dirEntry = readdir(batteryDir)))
+   {
       const char *entryName = dirEntry->d_name;
       if (!String_startsWith(entryName, "BAT"))
          continue;
@@ -651,13 +781,15 @@ static double Platform_Battery_getProcBatInfo(void) {
 
       // Getting total charge for all batteries
       char *buf = bufInfo;
-      while ((line = strsep(&buf, "\n")) != NULL) {
+      while ((line = strsep(&buf, "\n")) != NULL)
+      {
          char field[100] = {0};
          int val = 0;
          if (2 != sscanf(line, "%99[^:]:%d", field, &val))
             continue;
 
-         if (String_eq(field, "last full capacity")) {
+         if (String_eq(field, "last full capacity"))
+         {
             totalFull += val;
             break;
          }
@@ -665,13 +797,15 @@ static double Platform_Battery_getProcBatInfo(void) {
 
       // Getting remaining charge for all batteries
       buf = bufState;
-      while ((line = strsep(&buf, "\n")) != NULL) {
+      while ((line = strsep(&buf, "\n")) != NULL)
+      {
          char field[100] = {0};
          int val = 0;
          if (2 != sscanf(line, "%99[^:]:%d", field, &val))
             continue;
 
-         if (String_eq(field, "remaining capacity")) {
+         if (String_eq(field, "remaining capacity"))
+         {
             totalRemain += val;
             break;
          }
@@ -683,7 +817,8 @@ static double Platform_Battery_getProcBatInfo(void) {
    return totalFull > 0 ? ((double)totalRemain * 100.0) / (double)totalFull : NAN;
 }
 
-static ACPresence procAcpiCheck(void) {
+static ACPresence procAcpiCheck(void)
+{
    char buffer[1024] = {0};
    ssize_t r = xReadfile(PROC_POWERSUPPLY_ACSTATE_FILE, buffer, sizeof(buffer));
    if (r < 1)
@@ -692,7 +827,8 @@ static ACPresence procAcpiCheck(void) {
    return String_eq(buffer, "on-line") ? AC_PRESENT : AC_ABSENT;
 }
 
-static void Platform_Battery_getProcData(double* percent, ACPresence* isOnAC) {
+static void Platform_Battery_getProcData(double *percent, ACPresence *isOnAC)
+{
    *isOnAC = procAcpiCheck();
    *percent = AC_ERROR != *isOnAC ? Platform_Battery_getProcBatInfo() : NAN;
 }
@@ -701,7 +837,8 @@ static void Platform_Battery_getProcData(double* percent, ACPresence* isOnAC) {
 // READ FROM /sys
 // ----------------------------------------
 
-static void Platform_Battery_getSysData(double* percent, ACPresence* isOnAC) {
+static void Platform_Battery_getSysData(double *percent, ACPresence *isOnAC)
+{
    *percent = NAN;
    *isOnAC = AC_ERROR;
 
@@ -712,18 +849,58 @@ static void Platform_Battery_getSysData(double* percent, ACPresence* isOnAC) {
    uint64_t totalFull = 0;
    uint64_t totalRemain = 0;
 
-   struct dirent* dirEntry = NULL;
-   while ((dirEntry = readdir(dir))) {
+   const struct dirent *dirEntry;
+   while ((dirEntry = readdir(dir)))
+   {
       const char *entryName = dirEntry->d_name;
 
-      if (String_startsWith(entryName, "BAT")) {
-         char buffer[1024] = {0};
-         char filePath[256];
-         xSnprintf(filePath, sizeof filePath, SYS_POWERSUPPLY_DIR "/%s/uevent", entryName);
-
-         ssize_t r = xReadfile(filePath, buffer, sizeof(buffer));
-         if (r < 0)
+#ifdef HAVE_OPENAT
+      int entryFd = openat(dirfd(dir), entryName, O_DIRECTORY | O_PATH);
+      if (entryFd < 0)
          continue;
+#else
+      char entryFd[4096];
+      xSnprintf(entryFd, sizeof(entryFd), SYS_POWERSUPPLY_DIR "/%s", entryName);
+#endif
+
+      enum
+      {
+         AC,
+         BAT
+      } type;
+      if (String_startsWith(entryName, "BAT"))
+      {
+         type = BAT;
+      }
+      else if (String_startsWith(entryName, "AC"))
+      {
+         type = AC;
+      }
+      else
+      {
+         char buffer[32];
+         ssize_t ret = xReadfileat(entryFd, "type", buffer, sizeof(buffer));
+         if (ret <= 0)
+            goto next;
+
+         /* drop optional trailing newlines */
+         for (char *buf = &buffer[(size_t)ret - 1]; *buf == '\n'; buf--)
+            *buf = '\0';
+
+         if (String_eq(buffer, "Battery"))
+            type = BAT;
+         else if (String_eq(buffer, "Mains"))
+            type = AC;
+         else
+            goto next;
+      }
+
+      if (type == BAT)
+      {
+         char buffer[1024];
+         ssize_t r = xReadfileat(entryFd, "uevent", buffer, sizeof(buffer));
+         if (r < 0)
+            goto next;
 
          bool full = false;
          bool now = false;
@@ -733,18 +910,21 @@ static void Platform_Battery_getSysData(double* percent, ACPresence* isOnAC) {
          const char *line;
 
          char *buf = buffer;
-         while ((line = strsep(&buf, "\n")) != NULL) {
+         while ((line = strsep(&buf, "\n")) != NULL)
+         {
             char field[100] = {0};
             int val = 0;
             if (2 != sscanf(line, "POWER_SUPPLY_%99[^=]=%d", field, &val))
                continue;
 
-            if (String_eq(field, "CAPACITY")) {
+            if (String_eq(field, "CAPACITY"))
+            {
                capacityLevel = val / 100.0;
                continue;
             }
 
-            if (String_eq(field, "ENERGY_FULL") || String_eq(field, "CHARGE_FULL")) {
+            if (String_eq(field, "ENERGY_FULL") || String_eq(field, "CHARGE_FULL"))
+            {
                fullCharge = val;
                totalFull += fullCharge;
                full = true;
@@ -753,7 +933,8 @@ static void Platform_Battery_getSysData(double* percent, ACPresence* isOnAC) {
                continue;
             }
 
-            if (String_eq(field, "ENERGY_NOW") || String_eq(field, "CHARGE_NOW")) {
+            if (String_eq(field, "ENERGY_NOW") || String_eq(field, "CHARGE_NOW"))
+            {
                totalRemain += val;
                now = true;
                if (full)
@@ -764,19 +945,18 @@ static void Platform_Battery_getSysData(double* percent, ACPresence* isOnAC) {
 
          if (!now && full && !isnan(capacityLevel))
             totalRemain += capacityLevel * fullCharge;
-
-      } else if (String_startsWith(entryName, "AC")) {
-         char buffer[2] = {0};
+      }
+      else if (type == AC)
+      {
          if (*isOnAC != AC_ERROR)
-            continue;
+            goto next;
 
-         char filePath[256];
-         xSnprintf(filePath, sizeof(filePath), SYS_POWERSUPPLY_DIR "/%s/online", entryName);
-
-         ssize_t r = xReadfile(filePath, buffer, sizeof(buffer));
-         if (r < 1) {
+         char buffer[2];
+         ssize_t r = xReadfileat(entryFd, "online", buffer, sizeof(buffer));
+         if (r < 1)
+         {
             *isOnAC = AC_ERROR;
-            continue;
+            goto next;
          }
 
          if (buffer[0] == '0')
@@ -784,6 +964,9 @@ static void Platform_Battery_getSysData(double* percent, ACPresence* isOnAC) {
          else if (buffer[0] == '1')
             *isOnAC = AC_PRESENT;
       }
+
+   next:
+      Compat_openatArgClose(entryFd);
    }
 
    closedir(dir);
@@ -791,29 +974,36 @@ static void Platform_Battery_getSysData(double* percent, ACPresence* isOnAC) {
    *percent = totalFull > 0 ? ((double)totalRemain * 100.0) / (double)totalFull : NAN;
 }
 
-void Platform_getBattery(double* percent, ACPresence* isOnAC) {
+void Platform_getBattery(double *percent, ACPresence *isOnAC)
+{
    time_t now = time(NULL);
    // update battery reading is slow. Update it each 10 seconds only.
-   if (now < Platform_Battery_cacheTime + 10) {
+   if (now < Platform_Battery_cacheTime + 10)
+   {
       *percent = Platform_Battery_cachePercent;
       *isOnAC = Platform_Battery_cacheIsOnAC;
       return;
    }
 
-   if (Platform_Battery_method == BAT_PROC) {
+   if (Platform_Battery_method == BAT_PROC)
+   {
       Platform_Battery_getProcData(percent, isOnAC);
       if (isnan(*percent))
          Platform_Battery_method = BAT_SYS;
    }
-   if (Platform_Battery_method == BAT_SYS) {
+   if (Platform_Battery_method == BAT_SYS)
+   {
       Platform_Battery_getSysData(percent, isOnAC);
       if (isnan(*percent))
          Platform_Battery_method = BAT_ERR;
    }
-   if (Platform_Battery_method == BAT_ERR) {
+   if (Platform_Battery_method == BAT_ERR)
+   {
       *percent = NAN;
       *isOnAC = AC_ERROR;
-   } else {
+   }
+   else
+   {
       *percent = CLAMP(*percent, 0.0, 100.0);
    }
    Platform_Battery_cachePercent = *percent;
@@ -829,34 +1019,46 @@ void Platform_longOptionsUsage(const char* name)
        "                                off - do not drop any capabilities\n"
        "                                basic (default) - drop all capabilities not needed by %s\n"
        "                                strict - drop all capabilities except those needed for\n"
-"                                         core functionality\n", name);
+       "                                         core functionality\n",
+       name);
 #else
    (void)name;
 #endif
 }
 
-CommandLineStatus Platform_getLongOption(int opt, int argc, char** argv) {
+CommandLineStatus Platform_getLongOption(int opt, int argc, char **argv)
+{
 #ifndef HAVE_LIBCAP
    (void)argc;
    (void)argv;
 #endif
 
-   switch (opt) {
+   switch (opt)
+   {
 #ifdef HAVE_LIBCAP
-      case 160: {
+   case 160:
+   {
       const char *mode = optarg;
       if (!mode && optind < argc && argv[optind] != NULL &&
-            (argv[optind][0] != '\0' && argv[optind][0] != '-')) {
+          (argv[optind][0] != '\0' && argv[optind][0] != '-'))
+      {
          mode = argv[optind++];
       }
 
-         if (!mode || String_eq(mode, "basic")) {
+      if (!mode || String_eq(mode, "basic"))
+      {
          Platform_capabilitiesMode = CAP_MODE_BASIC;
-         } else if (String_eq(mode, "off")) {
+      }
+      else if (String_eq(mode, "off"))
+      {
          Platform_capabilitiesMode = CAP_MODE_OFF;
-         } else if (String_eq(mode, "strict")) {
+      }
+      else if (String_eq(mode, "strict"))
+      {
          Platform_capabilitiesMode = CAP_MODE_STRICT;
-         } else {
+      }
+      else
+      {
          fprintf(stderr, "Error: invalid capabilities mode \"%s\".\n", mode);
          return STATUS_ERROR_EXIT;
       }
@@ -871,7 +1073,8 @@ CommandLineStatus Platform_getLongOption(int opt, int argc, char** argv) {
 }
 
 #ifdef HAVE_LIBCAP
-static int dropCapabilities(enum CapMode mode) {
+static int dropCapabilities(enum CapMode mode)
+{
 
    if (mode == CAP_MODE_OFF)
       return 0;
@@ -894,30 +1097,35 @@ static int dropCapabilities(enum CapMode mode) {
    const size_t ncap = (mode == CAP_MODE_BASIC) ? ARRAYSIZE(keepcapsBasic) : ARRAYSIZE(keepcapsStrict);
 
    cap_t caps = cap_init();
-   if (caps == NULL) {
+   if (caps == NULL)
+   {
       fprintf(stderr, "Error: can not initialize capabilities: %s\n", strerror(errno));
       return -1;
    }
 
-   if (cap_clear(caps) < 0) {
+   if (cap_clear(caps) < 0)
+   {
       fprintf(stderr, "Error: can not clear capabilities: %s\n", strerror(errno));
       cap_free(caps);
       return -1;
    }
 
    cap_t currCaps = cap_get_proc();
-   if (currCaps == NULL) {
+   if (currCaps == NULL)
+   {
       fprintf(stderr, "Error: can not get current process capabilities: %s\n", strerror(errno));
       cap_free(caps);
       return -1;
    }
 
-   for (size_t i = 0; i < ncap; i++) {
+   for (size_t i = 0; i < ncap; i++)
+   {
       if (!CAP_IS_SUPPORTED(keepcaps[i]))
          continue;
 
       cap_flag_value_t current;
-      if (cap_get_flag(currCaps, keepcaps[i], CAP_PERMITTED, &current) < 0) {
+      if (cap_get_flag(currCaps, keepcaps[i], CAP_PERMITTED, &current) < 0)
+      {
          fprintf(stderr, "Error: can not get current value of capability %d: %s\n", keepcaps[i], strerror(errno));
          cap_free(currCaps);
          cap_free(caps);
@@ -927,14 +1135,16 @@ static int dropCapabilities(enum CapMode mode) {
       if (current != CAP_SET)
          continue;
 
-      if (cap_set_flag(caps, CAP_PERMITTED, 1, &keepcaps[i], CAP_SET) < 0) {
+      if (cap_set_flag(caps, CAP_PERMITTED, 1, &keepcaps[i], CAP_SET) < 0)
+      {
          fprintf(stderr, "Error: can not set permitted capability %d: %s\n", keepcaps[i], strerror(errno));
          cap_free(currCaps);
          cap_free(caps);
          return -1;
       }
 
-      if (cap_set_flag(caps, CAP_EFFECTIVE, 1, &keepcaps[i], CAP_SET) < 0) {
+      if (cap_set_flag(caps, CAP_EFFECTIVE, 1, &keepcaps[i], CAP_SET) < 0)
+      {
          fprintf(stderr, "Error: can not set effective capability %d: %s\n", keepcaps[i], strerror(errno));
          cap_free(currCaps);
          cap_free(caps);
@@ -942,7 +1152,8 @@ static int dropCapabilities(enum CapMode mode) {
       }
    }
 
-   if (cap_set_proc(caps) < 0) {
+   if (cap_set_proc(caps) < 0)
+   {
       fprintf(stderr, "Error: can not set process capabilities: %s\n", strerror(errno));
       cap_free(currCaps);
       cap_free(caps);
@@ -956,13 +1167,15 @@ static int dropCapabilities(enum CapMode mode) {
 }
 #endif
 
-bool Platform_init(void) {
+bool Platform_init(void)
+{
 #ifdef HAVE_LIBCAP
    if (dropCapabilities(Platform_capabilitiesMode) < 0)
       return false;
 #endif
 
-   if (access(PROCDIR, R_OK) != 0) {
+   if (access(PROCDIR, R_OK) != 0)
+   {
       fprintf(stderr, "Error: could not read procfs (compiled to look in %s).\n", PROCDIR);
       return false;
    }
@@ -971,10 +1184,40 @@ bool Platform_init(void) {
    LibSensors_init();
 #endif
 
+   char target[PATH_MAX];
+   ssize_t ret = readlink(PROCDIR "/self/ns/pid", target, sizeof(target) - 1);
+   if (ret > 0)
+   {
+      target[ret] = '\0';
+
+      if (!String_eq("pid:[4026531836]", target))
+      { // magic constant PROC_PID_INIT_INO from include/linux/proc_ns.h#L46
+         Running_containerized = true;
+         return true; // early return
+      }
+   }
+
+   FILE *fd = fopen(PROCDIR "/1/mounts", "r");
+   if (fd)
+   {
+      char lineBuffer[256];
+      while (fgets(lineBuffer, sizeof(lineBuffer), fd))
+      {
+         // detect lxc or overlayfs and guess that this means we are running containerized
+         if (String_startsWith(lineBuffer, "lxcfs /proc") || String_startsWith(lineBuffer, "overlay "))
+         {
+            Running_containerized = true;
+            break;
+         }
+      }
+      fclose(fd);
+   } // if (fd)
+
    return true;
 }
 
-void Platform_done(void) {
+void Platform_done(void)
+{
 #ifdef HAVE_SENSORS_SENSORS_H
    LibSensors_cleanup();
 #endif

linux/Platform.h

@@ -37,8 +37,9 @@ in the source distribution for its full text.
 #define PATH_MAX 4096
 #endif
 
+extern const ScreenDefaults Platform_defaultScreens[];
 
-extern const ProcessField Platform_defaultFields[];
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 extern const SignalItem Platform_signals[];
 
@@ -49,10 +50,16 @@ extern const MeterClass* const Platform_meterTypes[];
 bool Platform_init(void);
 void Platform_done(void);
 
+extern bool Running_containerized;
+
 void Platform_setBindings(Htop_Action *keys);
 
 int Platform_getUptime(void);
 
+float Platform_getTemp(void);
+
+float Platform_getFreq(void);
+
 void Platform_getLoadAverage(double *one, double *five, double *fifteen);
 
 int Platform_getMaxPid(void);
@@ -83,11 +90,13 @@ bool Platform_getNetworkIO(NetworkIOData* data);
 
 void Platform_getBattery(double *percent, ACPresence *isOnAC);
 
-static inline void Platform_getHostname(char* buffer, size_t size) {
+static inline void Platform_getHostname(char *buffer, size_t size)
+{
    Generic_hostname(buffer, size);
 }
 
-static inline void Platform_getRelease(char** string) {
+static inline void Platform_getRelease(char **string)
+{
    *string = Generic_uname();
 }
 
@@ -102,11 +111,13 @@ void Platform_longOptionsUsage(const char* name);
 
 CommandLineStatus Platform_getLongOption(int opt, int argc, char **argv);
 
-static inline void Platform_gettime_realtime(struct timeval* tv, uint64_t* msec) {
+static inline void Platform_gettime_realtime(struct timeval *tv, uint64_t *msec)
+{
    Generic_gettime_realtime(tv, msec);
 }
 
-static inline void Platform_gettime_monotonic(uint64_t* msec) {
+static inline void Platform_gettime_monotonic(uint64_t *msec)
+{
    Generic_gettime_monotonic(msec);
 }
 

linux/SystemdMeter.c

@@ -219,7 +219,10 @@ static void updateViaExec(void) {
          exit(1);
       dup2(fdnull, STDERR_FILENO);
       close(fdnull);
-      execlp("systemctl",
+      // Use of NULL in variadic functions must have a pointer cast.
+      // The NULL constant is not required by standard to have a pointer type.
+      execlp(
+         "systemctl",
          "systemctl",
          "show",
          "--property=SystemState",
@@ -227,7 +230,7 @@ static void updateViaExec(void) {
          "--property=NNames",
          "--property=NJobs",
          "--property=NInstalledJobs",
-             NULL);
+         (char *)NULL);
       exit(127);
    }
    close(fdpair[1]);

netbsd/NetBSDProcess.c

@@ -148,6 +148,7 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
       .description = "Percentage of the CPU time the process used in the last sampling",
       .flags = 0,
       .defaultSortDesc = true,
+      .autoWidth = true,
    },
    [PERCENT_NORM_CPU] = {
       .name = "PERCENT_NORM_CPU",
@@ -155,6 +156,7 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
       .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)",
       .flags = 0,
       .defaultSortDesc = true,
+      .autoWidth = true,
    },
    [PERCENT_MEM] = {
       .name = "PERCENT_MEM",

netbsd/NetBSDProcessList.c

@@ -307,7 +307,7 @@ static void NetBSDProcessList_scanProcs(NetBSDProcessList* this) {
          }
       }
 
-      if (settings->flags & PROCESS_FLAG_CWD) {
+      if (settings->ss->flags & PROCESS_FLAG_CWD) {
          NetBSDProcessList_updateCwd(kproc, proc);
       }
 
@@ -318,8 +318,11 @@ static void NetBSDProcessList_scanProcs(NetBSDProcessList* this) {
 
       proc->m_virt = kproc->p_vm_vsize;
       proc->m_resident = kproc->p_vm_rssize;
+
       proc->percent_mem = (proc->m_resident * pageSizeKB) / (double)(this->super.totalMem) * 100.0;
       proc->percent_cpu = CLAMP(getpcpu(kproc), 0.0, this->super.activeCPUs * 100.0);
+      Process_updateCPUFieldWidths(proc->percent_cpu);
+
       proc->nlwp = kproc->p_nlwps;
       proc->nice = kproc->p_nice - 20;
       proc->time = 100 * (kproc->p_rtime_sec + ((kproc->p_rtime_usec + 500000) / 1000000));

netbsd/Platform.c

@@ -66,7 +66,15 @@ in the source distribution for its full text.
 #define prop_number_signed_value prop_number_integer_value
 #endif
 
-const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+const ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME Command",
+      .sortKey = "PERCENT_CPU",
+   },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
 
 /*
  * See /usr/include/sys/signal.h
@@ -303,7 +311,13 @@ char* Platform_getProcessEnv(pid_t pid) {
    for (char** p = ptr; *p; p++) {
       size_t len = strlen(*p) + 1;
 
-      if (size + len > capacity) {
+      while (size + len > capacity) {
+         if (capacity > (SIZE_MAX / 2)) {
+            free(env);
+            env = NULL;
+            goto end;
+         }
+
          capacity *= 2;
          env = xRealloc(env, capacity);
       }
@@ -319,6 +333,7 @@ char* Platform_getProcessEnv(pid_t pid) {
       env[size + 1] = 0;
    }
 
+end:
    (void) kvm_close(kt);
    return env;
 }

netbsd/Platform.h

@@ -34,7 +34,9 @@ in the source distribution for its full text.
 #define PLATFORM_LONG_OPTIONS \
    // End of list
 
-extern const ProcessField Platform_defaultFields[];
+extern const ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 /* see /usr/include/sys/signal.h */
 extern const SignalItem Platform_signals[];

openbsd/OpenBSDProcess.c

@@ -146,6 +146,7 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
       .description = "Percentage of the CPU time the process used in the last sampling",
       .flags = 0,
       .defaultSortDesc = true,
+      .autoWidth = true,
    },
    [PERCENT_NORM_CPU] = {
       .name = "PERCENT_NORM_CPU",
@@ -153,6 +154,7 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
       .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)",
       .flags = 0,
       .defaultSortDesc = true,
+      .autoWidth = true,
    },
    [PERCENT_MEM] = {
       .name = "PERCENT_MEM",

openbsd/OpenBSDProcessList.c

@@ -309,7 +309,7 @@ static void OpenBSDProcessList_scanProcs(OpenBSDProcessList* this) {
 
          OpenBSDProcessList_updateProcessName(this->kd, kproc, proc);
 
-         if (settings->flags & PROCESS_FLAG_CWD) {
+         if (settings->ss->flags & PROCESS_FLAG_CWD) {
             OpenBSDProcessList_updateCwd(kproc, proc);
          }
 
@@ -330,8 +330,11 @@ static void OpenBSDProcessList_scanProcs(OpenBSDProcessList* this) {
       fp->addr = kproc->p_addr;
       proc->m_virt = kproc->p_vm_dsize * pageSizeKB;
       proc->m_resident = kproc->p_vm_rssize * pageSizeKB;
+
       proc->percent_mem = proc->m_resident / (float)this->super.totalMem * 100.0F;
       proc->percent_cpu = CLAMP(getpcpu(kproc), 0.0F, this->super.activeCPUs * 100.0F);
+      Process_updateCPUFieldWidths(proc->percent_cpu);
+
       proc->nice = kproc->p_nice - 20;
       proc->time = 100 * (kproc->p_rtime_sec + ((kproc->p_rtime_usec + 500000) / 1000000));
       proc->priority = kproc->p_priority - PZERO;

openbsd/Platform.c

@@ -46,7 +46,15 @@ in the source distribution for its full text.
 #include "openbsd/OpenBSDProcessList.h"
 
 
-const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+const ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME Command",
+      .sortKey = "PERCENT_CPU",
+   },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
 
 /*
  * See /usr/include/sys/signal.h
@@ -261,7 +269,13 @@ char* Platform_getProcessEnv(pid_t pid) {
    for (char** p = ptr; *p; p++) {
       size_t len = strlen(*p) + 1;
 
-      if (size + len > capacity) {
+      while (size + len > capacity) {
+         if (capacity > (SIZE_MAX / 2)) {
+            free(env);
+            env = NULL;
+            goto end;
+         }
+
          capacity *= 2;
          env = xRealloc(env, capacity);
       }
@@ -277,6 +291,7 @@ char* Platform_getProcessEnv(pid_t pid) {
       env[size + 1] = 0;
    }
 
+end:
    (void) kvm_close(kt);
    return env;
 }

openbsd/Platform.h

@@ -26,7 +26,9 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern const ProcessField Platform_defaultFields[];
+extern const ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 /* see /usr/include/sys/signal.h */
 extern const SignalItem Platform_signals[];

pcp-htop.5.in

@@ -1,4 +1,4 @@
-.TH "PCP-HTOP" "5" "2021" "@PACKAGE_STRING@" "File Formats"
+.TH "PCP-HTOP" "5" "2022" "@PACKAGE_STRING@" "File Formats"
 .SH "NAME"
 \f3pcp-htop\f1 \- pcp-htop configuration file
 .SH "DESCRIPTION"

pcp/PCPMetric.h

@@ -81,6 +81,7 @@ typedef enum PCPMetric_ {
    PCP_ZFS_ARC_BONUS_SIZE,      /* zfs.arc.bonus_size */
    PCP_ZFS_ARC_COMPRESSED_SIZE, /* zfs.arc.compressed_size */
    PCP_ZFS_ARC_UNCOMPRESSED_SIZE, /* zfs.arc.uncompressed_size */
+   PCP_ZFS_ARC_C_MIN,           /* zfs.arc.c_min */
    PCP_ZFS_ARC_C_MAX,           /* zfs.arc.c_max */
    PCP_ZFS_ARC_DBUF_SIZE,       /* zfs.arc.dbuf_size */
    PCP_ZFS_ARC_DNODE_SIZE,      /* zfs.arc.dnode_size */

pcp/PCPProcess.c

@@ -54,8 +54,8 @@ const ProcessFieldData Process_fields[] = {
    [M_LRS] = { .name = "M_LRS", .title = "  LIB ", .description = "The library size of the process (unused since Linux 2.6; always 0)", .flags = 0, .defaultSortDesc = true, },
    [M_DT] = { .name = "M_DT", .title = " DIRTY ", .description = "Size of the dirty pages of the process (unused since Linux 2.6; always 0)", .flags = 0, .defaultSortDesc = true, },
    [ST_UID] = { .name = "ST_UID", .title = "UID", .description = "User ID of the process owner", .flags = 0, },
-   [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, .defaultSortDesc = true, },
-   [PERCENT_NORM_CPU] = { .name = "PERCENT_NORM_CPU", .title = "NCPU%", .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)", .flags = 0, .defaultSortDesc = true, },
+   [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = " CPU%", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, .defaultSortDesc = true, .autoWidth = true, },
+   [PERCENT_NORM_CPU] = { .name = "PERCENT_NORM_CPU", .title = "NCPU%", .description = "Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)", .flags = 0, .defaultSortDesc = true, .autoWidth = true, },
    [PERCENT_MEM] = { .name = "PERCENT_MEM", .title = "MEM% ", .description = "Percentage of the memory the process is using, based on resident memory size", .flags = 0, .defaultSortDesc = true, },
    [USER] = { .name = "USER", .title = "USER       ", .description = "Username of the process owner (or user ID if name cannot be determined)", .flags = 0, },
    [TIME] = { .name = "TIME", .title = "  TIME+  ", .description = "Total time the process has spent in user and system time", .flags = 0, .defaultSortDesc = true, },

pcp/PCPProcessList.c

@@ -384,12 +384,12 @@ static bool PCPProcessList_updateProcesses(PCPProcessList* this, double period,
          continue;
       }
 
-      if (settings->flags & PROCESS_FLAG_IO)
+      if (settings->ss->flags & PROCESS_FLAG_IO)
          PCPProcessList_updateIO(pp, pid, offset, now);
 
       PCPProcessList_updateMemory(pp, pid, offset);
 
-      if ((settings->flags & PROCESS_FLAG_LINUX_SMAPS) &&
+      if ((settings->ss->flags & PROCESS_FLAG_LINUX_SMAPS) &&
           (Process_isKernelThread(proc) == false)) {
          if (PCPMetric_enabled(PCP_PROC_SMAPS_PSS))
             PCPProcessList_updateSmaps(pp, pid, offset);
@@ -408,6 +408,7 @@ static bool PCPProcessList_updateProcesses(PCPProcessList* this, double period,
       proc->percent_cpu = isnan(percent_cpu) ?
                           0.0 : CLAMP(percent_cpu, 0.0, pl->activeCPUs * 100.0);
       proc->percent_mem = proc->m_resident / (double)pl->totalMem * 100.0;
+      Process_updateCPUFieldWidths(proc->percent_cpu);
 
       PCPProcessList_updateUsername(proc, pid, offset, pl->usersTable);
 
@@ -419,22 +420,22 @@ static bool PCPProcessList_updateProcesses(PCPProcessList* this, double period,
          PCPProcessList_updateCmdline(proc, pid, offset, command);
       }
 
-      if (settings->flags & PROCESS_FLAG_LINUX_CGROUP)
+      if (settings->ss->flags & PROCESS_FLAG_LINUX_CGROUP)
          PCPProcessList_readCGroups(pp, pid, offset);
 
-      if (settings->flags & PROCESS_FLAG_LINUX_OOM)
+      if (settings->ss->flags & PROCESS_FLAG_LINUX_OOM)
          PCPProcessList_readOomData(pp, pid, offset);
 
-      if (settings->flags & PROCESS_FLAG_LINUX_CTXT)
+      if (settings->ss->flags & PROCESS_FLAG_LINUX_CTXT)
          PCPProcessList_readCtxtData(pp, pid, offset);
 
-      if (settings->flags & PROCESS_FLAG_LINUX_SECATTR)
+      if (settings->ss->flags & PROCESS_FLAG_LINUX_SECATTR)
          PCPProcessList_readSecattrData(pp, pid, offset);
 
-      if (settings->flags & PROCESS_FLAG_CWD)
+      if (settings->ss->flags & PROCESS_FLAG_CWD)
          PCPProcessList_readCwd(pp, pid, offset);
 
-      if (settings->flags & PROCESS_FLAG_LINUX_AUTOGROUP)
+      if (settings->ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP)
          PCPProcessList_readAutogroup(pp, pid, offset);
 
       if (proc->state == ZOMBIE && !proc->cmdline && command[0]) {
@@ -600,6 +601,8 @@ static inline void PCPProcessList_scanZfsArcstats(PCPProcessList* this) {
    memset(&this->zfs, 0, sizeof(ZfsArcStats));
    if (PCPMetric_values(PCP_ZFS_ARC_ANON_SIZE, &value, 1, PM_TYPE_U64))
       this->zfs.anon = value.ull / ONE_K;
+   if (PCPMetric_values(PCP_ZFS_ARC_C_MIN, &value, 1, PM_TYPE_U64))
+      this->zfs.min = value.ull / ONE_K;
    if (PCPMetric_values(PCP_ZFS_ARC_C_MAX, &value, 1, PM_TYPE_U64))
       this->zfs.max = value.ull / ONE_K;
    if (PCPMetric_values(PCP_ZFS_ARC_BONUS_SIZE, &value, 1, PM_TYPE_U64))
@@ -676,16 +679,16 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
    for (int metric = PCP_PROC_PID; metric < PCP_METRIC_COUNT; metric++)
       PCPMetric_enable(metric, enabled);
 
-   flagged = settings->flags & PROCESS_FLAG_LINUX_CGROUP;
+   flagged = settings->ss->flags & PROCESS_FLAG_LINUX_CGROUP;
    PCPMetric_enable(PCP_PROC_CGROUPS, flagged && enabled);
-   flagged = settings->flags & PROCESS_FLAG_LINUX_OOM;
+   flagged = settings->ss->flags & PROCESS_FLAG_LINUX_OOM;
    PCPMetric_enable(PCP_PROC_OOMSCORE, flagged && enabled);
-   flagged = settings->flags & PROCESS_FLAG_LINUX_CTXT;
+   flagged = settings->ss->flags & PROCESS_FLAG_LINUX_CTXT;
    PCPMetric_enable(PCP_PROC_VCTXSW, flagged && enabled);
    PCPMetric_enable(PCP_PROC_NVCTXSW, flagged && enabled);
-   flagged = settings->flags & PROCESS_FLAG_LINUX_SECATTR;
+   flagged = settings->ss->flags & PROCESS_FLAG_LINUX_SECATTR;
    PCPMetric_enable(PCP_PROC_LABELS, flagged && enabled);
-   flagged = settings->flags & PROCESS_FLAG_LINUX_AUTOGROUP;
+   flagged = settings->ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP;
    PCPMetric_enable(PCP_PROC_AUTOGROUP_ID, flagged && enabled);
    PCPMetric_enable(PCP_PROC_AUTOGROUP_NICE, flagged && enabled);
 

pcp/Platform.c

@@ -54,9 +54,20 @@ in the source distribution for its full text.
 
 Platform* pcp;
 
-ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, (int)M_SHARE, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+const ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT M_SHARE STATE PERCENT_CPU PERCENT_MEM TIME Command",
+      .sortKey = "PERCENT_CPU",
+   },
+   {
+      .name = "I/O",
+      .columns = "PID USER IO_PRIORITY IO_RATE IO_READ_RATE IO_WRITE_RATE PERCENT_SWAP_DELAY PERCENT_IO_DELAY Command",
+      .sortKey = "IO_RATE",
+   },
+};
 
-int Platform_numberOfFields = LAST_PROCESSFIELD;
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
 
 const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number = 0 },
@@ -167,6 +178,7 @@ static const char* Platform_metricNames[] = {
    [PCP_ZFS_ARC_BONUS_SIZE] = "zfs.arc.bonus_size",
    [PCP_ZFS_ARC_COMPRESSED_SIZE] = "zfs.arc.compressed_size",
    [PCP_ZFS_ARC_UNCOMPRESSED_SIZE] = "zfs.arc.uncompressed_size",
+   [PCP_ZFS_ARC_C_MIN] = "zfs.arc.c_min",
    [PCP_ZFS_ARC_C_MAX] = "zfs.arc.c_max",
    [PCP_ZFS_ARC_DBUF_SIZE] = "zfs.arc.dbuf_size",
    [PCP_ZFS_ARC_DNODE_SIZE] = "zfs.arc.dnode_size",
@@ -499,8 +511,13 @@ void Platform_setMemoryValues(Meter* this) {
    this->values[4] = pl->availableMem;
 
    if (ppl->zfs.enabled != 0) {
-      this->values[0] -= ppl->zfs.size;
-      this->values[3] += ppl->zfs.size;
+      // ZFS does not shrink below the value of zfs_arc_min.
+      unsigned long long int shrinkableSize = 0;
+      if (ppl->zfs.size > ppl->zfs.min)
+         shrinkableSize = ppl->zfs.size - ppl->zfs.min;
+      this->values[0] -= shrinkableSize;
+      this->values[3] += shrinkableSize;
+      this->values[4] += shrinkableSize;
    }
 }
 

pcp/Platform.h

@@ -58,9 +58,9 @@ typedef struct Platform_ {
    unsigned int ncpu;         /* maximum processor count configured */
 } Platform;
 
-extern ProcessField Platform_defaultFields[];
+extern const ScreenDefaults Platform_defaultScreens[];
 
-extern int Platform_numberOfFields;
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 extern const SignalItem Platform_signals[];
 

solaris/Platform.c

@@ -40,6 +40,16 @@ in the source distribution for its full text.
 #include "SolarisProcessList.h"
 
 
+const ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Default",
+      .columns = "PID LWPID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME Command",
+      .sortKey = "PERCENT_CPU",
+   },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
+
 const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",      .number =  0 },
    { .name = " 1 SIGHUP",      .number =  1 },
@@ -87,8 +97,6 @@ const SignalItem Platform_signals[] = {
 
 const unsigned int Platform_numberOfSignals = ARRAYSIZE(Platform_signals);
 
-const ProcessField Platform_defaultFields[] = { PID, LWPID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
-
 const MeterClass* const Platform_meterTypes[] = {
    &CPUMeter_class,
    &ClockMeter_class,
@@ -259,16 +267,21 @@ static int Platform_buildenv(void* accum, struct ps_prochandle* Phandle, uintptr
    envAccum* accump = accum;
    (void) Phandle;
    (void) addr;
+
    size_t thissz = strlen(str);
-   if ((thissz + 2) > (accump->capacity - accump->size)) {
-      accump->env = xRealloc(accump->env, accump->capacity *= 2);
-   }
-   if ((thissz + 2) > (accump->capacity - accump->size)) {
+
+   while ((thissz + 2) > (accump->capacity - accump->size)) {
+      if (accump->capacity > (SIZE_MAX / 2))
          return 1;
+
+      accump->capacity *= 2;
+      accump->env = xRealloc(accump->env, accump->capacity);
    }
-   strlcpy( accump->env + accump->size, str, (accump->capacity - accump->size));
+
+   strlcpy( accump->env + accump->size, str, accump->capacity - accump->size);
    strncpy( accump->env + accump->size + thissz + 1, "\n", 2);
-   accump->size = accump->size + thissz + 1;
+
+   accump->size += thissz + 1;
    return 0;
 }
 
@@ -291,7 +304,8 @@ char* Platform_getProcessEnv(pid_t pid) {
    Prelease(Phandle, 0);
 
    strncpy( envBuilder.env + envBuilder.size, "\0", 1);
-   return envBuilder.env;
+
+   return xRealloc(envBuilder.env, envBuilder.size + 1);
 }
 
 char* Platform_getInodeFilename(pid_t pid, ino_t inode) {