Release 3.1.2

Use PF_KTHREAD flag in /proc/[pid]/stat to detect kernel threads.
This fixed an issue when a process's cmdline is empty, htop think
it is a kernel thread.

.github/workflows/build_release.yml

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

Action.c

@@ -1,7 +1,7 @@
 /*
 htop - Action.c
 (C) 2015 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -519,7 +519,7 @@ static Htop_Reaction actionHelp(State* st) {
    int line = 0;
 
    mvaddstr(line++, 0, "htop " VERSION " - " COPYRIGHT);
-   mvaddstr(line++, 0, "Released under the GNU GPLv2. See 'man' page for more info.");
+   mvaddstr(line++, 0, "Released under the GNU GPLv2+. See 'man' page for more info.");
 
    attrset(CRT_colors[DEFAULT_COLOR]);
    line++;

Action.h

@@ -3,7 +3,7 @@
 /*
 htop - Action.h
 (C) 2015 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

Affinity.c

@@ -2,7 +2,7 @@
 htop - Affinity.c
 (C) 2004-2011 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

Affinity.h

@@ -4,7 +4,7 @@
 htop - Affinity.h
 (C) 2004-2011 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

AffinityPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - AffinityPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

AffinityPanel.h

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

AvailableColumnsPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - AvailableColumnsPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

AvailableColumnsPanel.h

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

AvailableMetersPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - AvailableMetersPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

AvailableMetersPanel.h

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

BatteryMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - BatteryMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 
 This meter written by Ian P. Hands (iphands@gmail.com, ihands@redhat.com).

BatteryMeter.h

@@ -3,7 +3,7 @@
 /*
 htop - BatteryMeter.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 
 This meter written by Ian P. Hands (iphands@gmail.com, ihands@redhat.com).

CPUMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - CPUMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

CPUMeter.h

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

CRT.c

@@ -1,7 +1,7 @@
 /*
 htop - CRT.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -21,14 +21,22 @@ in the source distribution for its full text.
 #include "ProvideCurses.h"
 #include "XUtils.h"
 
-#ifdef HAVE_EXECINFO_H
-#include <execinfo.h>
-#endif
-
 #if !defined(NDEBUG) && defined(HAVE_MEMFD_CREATE)
 #include <sys/mman.h>
 #endif
 
+#if defined(HAVE_LIBUNWIND_H) && defined(HAVE_LIBUNWIND)
+# define PRINT_BACKTRACE
+# define UNW_LOCAL_ONLY
+# include <libunwind.h>
+# if defined(HAVE_DLADDR)
+#  include <dlfcn.h>
+# endif
+#elif defined(HAVE_EXECINFO_H)
+# define PRINT_BACKTRACE
+# include <execinfo.h>
+#endif
+
 
 #define ColorIndex(i,j) ((7-(i))*8+(j))
 
@@ -1008,6 +1016,59 @@ void CRT_setColors(int colorScheme) {
    CRT_colors = CRT_colorSchemes[colorScheme];
 }
 
+#ifdef PRINT_BACKTRACE
+static void print_backtrace(void) {
+#if defined(HAVE_LIBUNWIND_H) && defined(HAVE_LIBUNWIND)
+   unw_context_t context;
+   unw_getcontext(&context);
+
+   unw_cursor_t cursor;
+   unw_init_local(&cursor, &context);
+
+   unsigned int item = 0;
+
+   while (unw_step(&cursor) > 0) {
+      unw_word_t pc;
+      unw_get_reg(&cursor, UNW_REG_IP, &pc);
+      if (pc == 0)
+         break;
+
+      char symbolName[256] = "?";
+      unw_word_t offset = 0;
+      unw_get_proc_name(&cursor, symbolName, sizeof(symbolName), &offset);
+
+      unw_proc_info_t pip;
+      pip.unwind_info = NULL;
+
+      const char* fname = "?";
+      const void* ptr = 0;
+      if (unw_get_proc_info(&cursor, &pip) == 0) {
+         ptr = (const void*)(pip.start_ip + offset);
+
+         #ifdef HAVE_DLADDR
+         Dl_info dlinfo;
+         if (dladdr(ptr, &dlinfo) && dlinfo.dli_fname && *dlinfo.dli_fname)
+            fname = dlinfo.dli_fname;
+         #endif
+      }
+
+      const char* frame = "";
+      if (unw_is_signal_frame(&cursor) > 0)
+         frame = "{signal frame}";
+
+      fprintf(stderr, "%2u: %#14lx  %s  (%s+%#lx)  [%p]%s%s\n", item++, pc, fname, symbolName, offset, ptr, frame ? "  " : "", frame);
+   }
+#elif defined(HAVE_EXECINFO_H)
+   void* backtraceArray[256];
+
+   size_t size = backtrace(backtraceArray, ARRAYSIZE(backtraceArray));
+   backtrace_symbols_fd(backtraceArray, size, STDERR_FILENO);
+#else
+#error No implementation for print_backtrace()!
+#endif
+}
+#endif
+
 void CRT_handleSIGSEGV(int signal) {
    CRT_done();
 
@@ -1022,7 +1083,7 @@ void CRT_handleSIGSEGV(int signal) {
       "  - Likely steps to reproduce (How did it happen?)\n"
    );
 
-#ifdef HAVE_EXECINFO_H
+#ifdef PRINT_BACKTRACE
    fprintf(stderr, "  - Backtrace of the issue (see below)\n");
 #endif
 
@@ -1048,16 +1109,14 @@ void CRT_handleSIGSEGV(int signal) {
    Settings_write(CRT_crashSettings, true);
    fprintf(stderr, "\n\n");
 
-#ifdef HAVE_EXECINFO_H
+#ifdef PRINT_BACKTRACE
    fprintf(stderr,
       "Backtrace information:\n"
       "----------------------\n"
    );
 
-   void* backtraceArray[256];
+   print_backtrace();
 
-   size_t size = backtrace(backtraceArray, ARRAYSIZE(backtraceArray));
-   backtrace_symbols_fd(backtraceArray, size, STDERR_FILENO);
    fprintf(stderr,
       "\n"
       "To make the above information more practical to work with, "

CRT.h

@@ -3,7 +3,7 @@
 /*
 htop - CRT.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -147,9 +147,9 @@ void CRT_fatalError(const char* note) ATTR_NORETURN;
 
 void CRT_handleSIGSEGV(int signal) ATTR_NORETURN;
 
-#define KEY_WHEELUP   KEY_F(20)
+#define KEY_WHEELUP   KEY_F(30)
-#define KEY_WHEELDOWN KEY_F(21)
+#define KEY_WHEELDOWN KEY_F(31)
-#define KEY_RECLICK   KEY_F(22)
+#define KEY_RECLICK   KEY_F(32)
 #define KEY_ALT(x)    (KEY_F(64 - 26) + ((x) - 'A'))
 
 extern const char* CRT_degreeSign;

CategoriesPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - CategoriesPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

CategoriesPanel.h

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

ChangeLog

@@ -1,3 +1,36 @@
+What's new in version 3.1.2
+
+* Bugfix for crash when storing modified settings at exit
+* Generate xz-compressed source tarball (with configure) using github actions
+* Allow -u UID with numerical value as argument
+* Added documentation for obsolete/state libraries/program files highlighting
+* Some obsolete/stale library highlighting refinements
+* Column width issues resolved
+* Dynamic UID column sizing improved
+* Discard stale information from Disk and Network I/O meters
+* Refined Linux kernel thread detection
+* Reworked process state handling
+* New CCGROUP column showing abbreviated cgroup name
+* New OFFSET column in the list of open files screen
+
+What's new in version 3.1.1
+
+* Update license headers to explicitly say GPLv2+
+* Document minimum version for libcap (thanks to James Brown)
+* Fix mouse wheel collision with autogroups nice adjustment
+* Adjust Makefile.am macro definitions for older automake versions
+* Ensure consistent reporting of MemoryMeter 'used' memory
+* Report hugepage memory as real and used memory (as before)
+* Handle procExeDeleted, usesDeletedLib without mergedCommandline mode
+* Validate meter configuration before proceeding beyond htoprc parsing
+* Properly release memory on partially read configuration
+* Handle interrupted sampling from within libpcp PDU transfers
+* On Linux, provide O_PATH value if not defined
+* On Linux, always compute procExeDeleted if already set
+* Workaround for Rosetta 2 on Darwin (thanks to Alexander Momchilov)
+* Fix FreeBSD cmdline memory leak in Process_updateCmdline, and
+* Plug a Disk I/O meter memory leak on FreeBSD (thanks to Ximalas)
+
 What's new in version 3.1.0
 
 * Updated COPYING file to remove the PLPA exemption (appendix 2)

ClockMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - ClockMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

ClockMeter.h

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

ColorsPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - ColorsPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -52,7 +52,7 @@ static HandlerResult ColorsPanel_eventHandler(Panel* super, int ch) {
    HandlerResult result = IGNORED;
    int mark;
 
-   switch(ch) {
+   switch (ch) {
    case 0x0a:
    case 0x0d:
    case KEY_ENTER:

ColorsPanel.h

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

ColumnsPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - ColumnsPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

ColumnsPanel.h

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

CommandLine.c

@@ -2,7 +2,7 @@
 htop - CommandLine.c
 (C) 2004-2011 Hisham H. Muhammad
 (C) 2020-2021 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -11,6 +11,7 @@ in the source distribution for its full text.
 #include "CommandLine.h"
 
 #include <assert.h>
+#include <ctype.h>
 #include <getopt.h>
 #include <locale.h>
 #include <stdbool.h>
@@ -47,7 +48,7 @@ static void printVersionFlag(const char* name) {
 static void printHelpFlag(const char* name) {
    printf("%s " VERSION "\n"
           COPYRIGHT "\n"
-          "Released under the GNU GPLv2.\n\n"
+          "Released under the GNU GPLv2+.\n\n"
           "-C --no-color                   Use a monochrome color scheme\n"
           "-d --delay=DELAY                Set the delay between updates, in tenths of seconds\n"
           "-F --filter=FILTER              Show only the commands matching the given filter\n"
@@ -85,9 +86,9 @@ typedef struct CommandLineSettings_ {
    bool readonly;
 } CommandLineSettings;
 
-static CommandLineSettings parseArguments(const char* program, int argc, char** argv) {
+static CommandLineStatus parseArguments(const char* program, int argc, char** argv, CommandLineSettings* flags) {
 
-   CommandLineSettings flags = {
+   *flags = (CommandLineSettings) {
       .pidMatchList = NULL,
       .commFilter = NULL,
       .userId = (uid_t)-1, // -1 is guaranteed to be an invalid uid_t (see setreuid(2))
@@ -130,10 +131,10 @@ static CommandLineSettings parseArguments(const char* program, int argc, char**
       switch (opt) {
          case 'h':
             printHelpFlag(program);
-            exit(0);
+            return STATUS_OK_EXIT;
          case 'V':
             printVersionFlag(program);
-            exit(0);
+            return STATUS_OK_EXIT;
          case 's':
             assert(optarg); /* please clang analyzer, cause optarg can be NULL in the 'u' case */
             if (String_eq(optarg, "help")) {
@@ -142,29 +143,29 @@ static CommandLineSettings parseArguments(const char* program, int argc, char**
                   const char* description = Process_fields[j].description;
                   if (name) printf("%19s %s\n", name, description);
                }
-               exit(0);
+               return STATUS_OK_EXIT;
             }
-            flags.sortKey = 0;
+            flags->sortKey = 0;
             for (int j = 1; j < LAST_PROCESSFIELD; j++) {
                if (Process_fields[j].name == NULL)
                   continue;
                if (String_eq(optarg, Process_fields[j].name)) {
-                  flags.sortKey = j;
+                  flags->sortKey = j;
                   break;
                }
             }
-            if (flags.sortKey == 0) {
+            if (flags->sortKey == 0) {
                fprintf(stderr, "Error: invalid column \"%s\".\n", optarg);
-               exit(1);
+               return STATUS_ERROR_EXIT;
             }
             break;
          case 'd':
-            if (sscanf(optarg, "%16d", &(flags.delay)) == 1) {
+            if (sscanf(optarg, "%16d", &(flags->delay)) == 1) {
-               if (flags.delay < 1) flags.delay = 1;
+               if (flags->delay < 1) flags->delay = 1;
-               if (flags.delay > 100) flags.delay = 100;
+               if (flags->delay > 100) flags->delay = 100;
             } else {
                fprintf(stderr, "Error: invalid delay value \"%s\".\n", optarg);
-               exit(1);
+               return STATUS_ERROR_EXIT;
             }
             break;
          case 'u':
@@ -176,26 +177,30 @@ static CommandLineSettings parseArguments(const char* program, int argc, char**
             }
 
             if (!username) {
-               flags.userId = geteuid();
+               flags->userId = geteuid();
-            } else if (!Action_setUserOnly(username, &(flags.userId))) {
+            } else if (!Action_setUserOnly(username, &(flags->userId))) {
-               fprintf(stderr, "Error: invalid user \"%s\".\n", username);
+               for (const char *itr = username; *itr; ++itr)
-               exit(1);
+                  if (!isdigit((unsigned char)*itr)) {
+                     fprintf(stderr, "Error: invalid user \"%s\".\n", username);
+                     return STATUS_ERROR_EXIT;
+                  }
+               flags->userId = atol(username);
             }
             break;
          }
          case 'C':
-            flags.useColors = false;
+            flags->useColors = false;
             break;
          case 'M':
 #ifdef HAVE_GETMOUSE
-            flags.enableMouse = false;
+            flags->enableMouse = false;
 #endif
             break;
          case 'U':
-            flags.allowUnicode = false;
+            flags->allowUnicode = false;
             break;
          case 't':
-            flags.treeView = true;
+            flags->treeView = true;
             break;
          case 'p': {
             assert(optarg); /* please clang analyzer, cause optarg can be NULL in the 'u' case */
@@ -203,14 +208,14 @@ static CommandLineSettings parseArguments(const char* program, int argc, char**
             char* saveptr;
             const char* pid = strtok_r(argCopy, ",", &saveptr);
 
-            if (!flags.pidMatchList) {
+            if (!flags->pidMatchList) {
-               flags.pidMatchList = Hashtable_new(8, false);
+               flags->pidMatchList = Hashtable_new(8, false);
             }
 
             while(pid) {
                 unsigned int num_pid = atoi(pid);
-                //  deepcode ignore CastIntegerToAddress: we just want a non-NUll pointer here
+                //  deepcode ignore CastIntegerToAddress: we just want a non-NULL pointer here
-                Hashtable_put(flags.pidMatchList, num_pid, (void *) 1);
+                Hashtable_put(flags->pidMatchList, num_pid, (void *) 1);
                 pid = strtok_r(NULL, ",", &saveptr);
             }
             free(argCopy);
@@ -219,7 +224,7 @@ static CommandLineSettings parseArguments(const char* program, int argc, char**
          }
          case 'F': {
             assert(optarg);
-            free_and_xStrdup(&flags.commFilter, optarg);
+            free_and_xStrdup(&flags->commFilter, optarg);
             break;
          }
          case 'H': {
@@ -229,28 +234,30 @@ static CommandLineSettings parseArguments(const char* program, int argc, char**
                 delay = argv[optind++];
             }
             if (delay) {
-                if (sscanf(delay, "%16d", &(flags.highlightDelaySecs)) == 1) {
+                if (sscanf(delay, "%16d", &(flags->highlightDelaySecs)) == 1) {
-                   if (flags.highlightDelaySecs < 1)
+                   if (flags->highlightDelaySecs < 1)
-                      flags.highlightDelaySecs = 1;
+                      flags->highlightDelaySecs = 1;
                 } else {
                    fprintf(stderr, "Error: invalid highlight delay value \"%s\".\n", delay);
-                   exit(1);
+                   return STATUS_ERROR_EXIT;
                 }
             }
-            flags.highlightChanges = true;
+            flags->highlightChanges = true;
             break;
          }
          case 128:
-            flags.readonly = true;
+            flags->readonly = true;
             break;
 
-         default:
+         default: {
-           if (Platform_getLongOption(opt, argc, argv) == false)
+            CommandLineStatus status;
-              exit(1);
+            if ((status = Platform_getLongOption(opt, argc, argv)) != STATUS_OK)
-           break;
+               return status;
+            break;
+         }
       }
    }
-   return flags;
+   return STATUS_OK;
 }
 
 static void CommandLine_delay(ProcessList* pl, unsigned long millisec) {
@@ -283,12 +290,17 @@ int CommandLine_run(const char* name, int argc, char** argv) {
    else
       setlocale(LC_CTYPE, "");
 
-   CommandLineSettings flags = parseArguments(name, argc, argv);
+   CommandLineStatus status = STATUS_OK;
+   CommandLineSettings flags = { 0 };
+
+   if ((status = parseArguments(name, argc, argv, &flags)) != STATUS_OK)
+      return status != STATUS_OK_EXIT ? 1 : 0;
 
    if (flags.readonly)
       Settings_enableReadonly();
 
-   Platform_init();
+   if (!Platform_init())
+      return 1;
 
    Process_setupColumnWidths();
 

CommandLine.h

@@ -4,10 +4,15 @@
 htop - CommandLine.h
 (C) 2004-2011 Hisham H. Muhammad
 (C) 2020-2021 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+typedef enum {
+   STATUS_OK,
+   STATUS_ERROR_EXIT,
+   STATUS_OK_EXIT
+} CommandLineStatus;
 
 int CommandLine_run(const char* name, int argc, char** argv);
 

Compat.c

@@ -1,7 +1,7 @@
 /*
 htop - Compat.c
 (C) 2020 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -44,7 +44,7 @@ int Compat_faccessat(int dirfd,
 
    // Fallback to stat(2)/lstat(2) depending on flags
    struct stat statinfo;
-   if(flags) {
+   if (flags) {
       ret = lstat(pathname, &statinfo);
    } else {
       ret = stat(pathname, &statinfo);

Compat.h

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

DateMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - DateMeter.c
 (C) 2004-2020 Hisham H. Muhammad, Michael Schönitzer
-Released under the GNU GPL, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

DateMeter.h

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

DateTimeMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - DateTimeMeter.c
 (C) 2004-2020 Hisham H. Muhammad, Michael Schönitzer
-Released under the GNU GPL, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

DateTimeMeter.h

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

DiskIOMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - DiskIOMeter.c
 (C) 2020 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -81,6 +81,12 @@ 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;
+   }
+
    this->values[0] = cached_utilisation_diff;
    this->total = MAXIMUM(this->values[0], 100.0); /* fix total after (initial) spike */
 

DiskIOMeter.h

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

DisplayOptionsPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - DisplayOptionsPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -107,7 +107,7 @@ DisplayOptionsPanel* DisplayOptionsPanel_new(Settings* settings, ScreenManager*
    Panel_add(super, (Object*) CheckItem_newByRef("Show custom thread names", &(settings->showThreadNames)));
    Panel_add(super, (Object*) CheckItem_newByRef("Show program path", &(settings->showProgramPath)));
    Panel_add(super, (Object*) CheckItem_newByRef("Highlight program \"basename\"", &(settings->highlightBaseName)));
-   Panel_add(super, (Object*) CheckItem_newByRef("Highlight out-dated/removed programs", &(settings->highlightDeletedExe)));
+   Panel_add(super, (Object*) CheckItem_newByRef("Highlight out-dated/removed programs (red) / libraries (yellow)", &(settings->highlightDeletedExe)));
    Panel_add(super, (Object*) CheckItem_newByRef("Merge exe, comm and cmdline in Command", &(settings->showMergedCommand)));
    Panel_add(super, (Object*) CheckItem_newByRef("- Try to find comm in cmdline (when Command is merged)", &(settings->findCommInCmdline)));
    Panel_add(super, (Object*) CheckItem_newByRef("- Try to strip exe from cmdline (when Command is merged)", &(settings->stripExeFromCmdline)));

DisplayOptionsPanel.h

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

DynamicColumn.c

@@ -3,7 +3,7 @@ htop - DynamicColumn.c
 (C) 2021 Sohaib Mohammed
 (C) 2021 htop dev team
 (C) 2021 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

DynamicMeter.c

@@ -2,7 +2,7 @@
 htop - DynamicMeter.c
 (C) 2021 htop dev team
 (C) 2021 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

FunctionBar.c

@@ -1,7 +1,7 @@
 /*
 htop - FunctionBar.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

FunctionBar.h

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

Hashtable.c

@@ -1,7 +1,7 @@
 /*
 htop - Hashtable.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

Hashtable.h

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

Header.c

@@ -1,7 +1,7 @@
 /*
 htop - Header.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -145,7 +145,7 @@ void Header_writeBackToSettings(const Header* this) {
       const Vector* vec = this->columns[col];
       int len = Vector_size(vec);
 
-      colSettings->names = len ? xCalloc(len, sizeof(char*)) : NULL;
+      colSettings->names = len ? xCalloc(len + 1, sizeof(char*)) : NULL;
       colSettings->modes = len ? xCalloc(len, sizeof(int)) : NULL;
       colSettings->len = len;
 

Header.h

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

HeaderLayout.h

@@ -3,7 +3,7 @@
 /*
 htop - HeaderLayout.h
 (C) 2021 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

HeaderOptionsPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - HeaderOptionsPanel.c
 (C) 2021 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -35,7 +35,7 @@ static HandlerResult HeaderOptionsPanel_eventHandler(Panel* super, int ch) {
    HandlerResult result = IGNORED;
    int mark;
 
-   switch(ch) {
+   switch (ch) {
    case 0x0a:
    case 0x0d:
    case KEY_ENTER:

HeaderOptionsPanel.h

@@ -3,7 +3,7 @@
 /*
 htop - ColorsPanel.h
 (C) 2021 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

HostnameMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - HostnameMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

HostnameMeter.h

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

IncSet.c

@@ -1,7 +1,7 @@
 /*
 htop - IncSet.c
 (C) 2005-2012 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -156,7 +156,7 @@ bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue
       doSearch = false;
    } else if (0 < ch && ch < 255 && isprint((unsigned char)ch)) {
       if (mode->index < INCMODE_MAX) {
-         mode->buffer[mode->index] = ch;
+         mode->buffer[mode->index] = (char) ch;
          mode->index++;
          mode->buffer[mode->index] = 0;
          if (mode->isFilter) {

IncSet.h

@@ -3,7 +3,7 @@
 /*
 htop - IncSet.h
 (C) 2005-2012 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

InfoScreen.c

@@ -135,7 +135,7 @@ void InfoScreen_run(InfoScreen* this) {
          continue;
       }
 
-      switch(ch) {
+      switch (ch) {
       case ERR:
          continue;
       case KEY_F(3):

ListItem.c

@@ -1,7 +1,7 @@
 /*
 htop - ListItem.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

ListItem.h

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

LoadAverageMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - LoadAverageMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

LoadAverageMeter.h

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

MainPanel.c

@@ -2,7 +2,7 @@
 htop - ColumnsPanel.c
 (C) 2004-2015 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -61,8 +61,14 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
    if (ch == KEY_RESIZE)
       return IGNORED;
 
-   /* reset on every normal key, except mouse events while mouse support is disabled */
+   /* reset on every normal key */
-   if (ch != ERR && (ch != KEY_MOUSE || this->state->settings->enableMouse))
+   bool needReset = ch != ERR;
+   #ifdef HAVE_GETMOUSE
+   /* except mouse events while mouse support is disabled */
+   if (!(ch != KEY_MOUSE || this->state->settings->enableMouse))
+      needReset = false;
+   #endif
+   if (needReset)
       this->state->hideProcessSelection = false;
 
    if (EVENT_IS_HEADER_CLICK(ch)) {

MainPanel.h

@@ -4,7 +4,7 @@
 htop - ColumnsPanel.h
 (C) 2004-2015 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

Makefile.am

@@ -1,3 +1,11 @@
+if !HTOP_PCP
+bin_PROGRAMS = htop
+myhtopplatprogram = htop.c
+else
+bin_PROGRAMS = pcp-htop
+myhtopplatprogram = pcp-htop.c
+endif
+
 dist_man_MANS = htop.1
 EXTRA_DIST = \
 	$(dist_man_MANS) \
@@ -145,6 +153,7 @@ linux_platform_headers = \
 	generic/gettime.h \
 	generic/hostname.h \
 	generic/uname.h \
+	linux/CGroupUtils.h \
 	linux/HugePageMeter.h \
 	linux/IOPriority.h \
 	linux/IOPriorityPanel.h \
@@ -166,6 +175,7 @@ linux_platform_sources = \
 	generic/gettime.c \
 	generic/hostname.c \
 	generic/uname.c \
+	linux/CGroupUtils.c \
 	linux/HugePageMeter.c \
 	linux/IOPriorityPanel.c \
 	linux/LibSensors.c \
@@ -181,7 +191,6 @@ linux_platform_sources = \
 
 if HTOP_LINUX
 AM_LDFLAGS += -rdynamic
-myhtopplatprogram = htop
 myhtopplatheaders = $(linux_platform_headers)
 myhtopplatsources = $(linux_platform_sources)
 endif
@@ -214,7 +223,6 @@ freebsd_platform_sources = \
 	zfs/ZfsCompressedArcMeter.c
 
 if HTOP_FREEBSD
-myhtopplatprogram = htop
 myhtopplatheaders = $(freebsd_platform_headers)
 myhtopplatsources = $(freebsd_platform_sources)
 endif
@@ -240,7 +248,6 @@ dragonflybsd_platform_sources = \
 	generic/uname.c
 
 if HTOP_DRAGONFLYBSD
-myhtopplatprogram = htop
 myhtopplatheaders = $(dragonflybsd_platform_headers)
 myhtopplatsources = $(dragonflybsd_platform_sources)
 endif
@@ -266,7 +273,6 @@ netbsd_platform_sources = \
 	netbsd/NetBSDProcessList.c
 
 if HTOP_NETBSD
-myhtopplatprogram = htop
 myhtopplatheaders = $(netbsd_platform_headers)
 myhtopplatsources = $(netbsd_platform_sources)
 endif
@@ -292,7 +298,6 @@ openbsd_platform_sources = \
 	openbsd/Platform.c
 
 if HTOP_OPENBSD
-myhtopplatprogram = htop
 myhtopplatheaders = $(openbsd_platform_headers)
 myhtopplatsources = $(openbsd_platform_sources)
 endif
@@ -304,6 +309,7 @@ darwin_platform_headers = \
 	darwin/DarwinProcess.h \
 	darwin/DarwinProcessList.h \
 	darwin/Platform.h \
+	darwin/PlatformHelpers.h \
 	darwin/ProcessField.h \
 	generic/gettime.h \
 	generic/hostname.h \
@@ -315,6 +321,7 @@ darwin_platform_headers = \
 
 darwin_platform_sources = \
 	darwin/Platform.c \
+	darwin/PlatformHelpers.c \
 	darwin/DarwinProcess.c \
 	darwin/DarwinProcessList.c \
 	generic/gettime.c \
@@ -326,7 +333,6 @@ darwin_platform_sources = \
 
 if HTOP_DARWIN
 AM_LDFLAGS += -framework IOKit -framework CoreFoundation
-myhtopplatprogram = htop
 myhtopplatheaders = $(darwin_platform_headers)
 myhtopplatsources = $(darwin_platform_sources)
 endif
@@ -357,7 +363,6 @@ solaris_platform_sources = \
 	zfs/ZfsCompressedArcMeter.c
 
 if HTOP_SOLARIS
-myhtopplatprogram = htop
 myhtopplatheaders = $(solaris_platform_headers)
 myhtopplatsources = $(solaris_platform_sources)
 endif
@@ -393,10 +398,9 @@ pcp_platform_sources = \
 	zfs/ZfsCompressedArcMeter.c
 
 if HTOP_PCP
-myhtopplatprogram = pcp-htop
 myhtopplatheaders = $(pcp_platform_headers)
 myhtopplatsources = $(pcp_platform_sources)
-pcp_htop_SOURCES  = $(myhtopplatprogram).c $(myhtopheaders) $(myhtopplatheaders) $(myhtopsources) $(myhtopplatsources)
+pcp_htop_SOURCES  = $(myhtopplatprogram) $(myhtopheaders) $(myhtopplatheaders) $(myhtopsources) $(myhtopplatsources)
 endif
 
 # Unsupported
@@ -416,15 +420,13 @@ unsupported_platform_sources = \
 	unsupported/UnsupportedProcessList.c
 
 if HTOP_UNSUPPORTED
-myhtopplatprogram = htop
 myhtopplatsources = $(unsupported_platform_sources)
 myhtopplatheaders = $(unsupported_platform_headers)
 endif
 
 # ----
 
-bin_PROGRAMS = $(myhtopplatprogram)
+htop_SOURCES = $(myhtopplatprogram) $(myhtopheaders) $(myhtopplatheaders) $(myhtopsources) $(myhtopplatsources)
-htop_SOURCES = $(myhtopplatprogram).c $(myhtopheaders) $(myhtopplatheaders) $(myhtopsources) $(myhtopplatsources)
 nodist_htop_SOURCES = config.h
 
 target:

MemoryMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - MemoryMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -36,7 +36,7 @@ static void MemoryMeter_updateValues(Meter* this) {
    /* Do not print available memory in bar mode */
    this->curItems = 4;
 
-   written = Meter_humanUnit(buffer, isnan(this->values[4]) ? this->values[0] : this->total - this->values[4], size);
+   written = Meter_humanUnit(buffer, this->values[0], size);
    METER_BUFFER_CHECK(buffer, size, written);
 
    METER_BUFFER_APPEND_CHR(buffer, size, '/');

MemoryMeter.h

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

MemorySwapMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - MemorySwapMeter.c
 (C) 2021 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

MemorySwapMeter.h

@@ -3,7 +3,7 @@
 /*
 htop - MemorySwapMeter.h
 (C) 2021 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

Meter.c

@@ -1,7 +1,7 @@
 /*
 htop - Meter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

Meter.h

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

MetersPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - MetersPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

MetersPanel.h

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

NetworkIOMeter.c

@@ -85,6 +85,12 @@ 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;
+   }
+
    this->values[0] = cached_rxb_diff;
    this->values[1] = cached_txb_diff;
    if (cached_rxb_diff + cached_txb_diff > this->total) {

Object.c

@@ -2,7 +2,7 @@
 htop - Object.c
 (C) 2004-2012 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

Object.h

@@ -4,7 +4,7 @@
 htop - Object.h
 (C) 2004-2012 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

OpenFilesScreen.c

@@ -1,7 +1,7 @@
 /*
 htop - OpenFilesScreen.c
 (C) 2005-2006 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -10,12 +10,14 @@ in the source distribution for its full text.
 #include "OpenFilesScreen.h"
 
 #include <fcntl.h>
+#include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <sys/stat.h>
 
 #include "Macros.h"
 #include "Panel.h"
@@ -25,7 +27,7 @@ in the source distribution for its full text.
 
 
 typedef struct OpenFiles_Data_ {
-   char* data[7];
+   char* data[8];
 } OpenFiles_Data;
 
 typedef struct OpenFiles_ProcessData_ {
@@ -55,6 +57,8 @@ static size_t getIndexForType(char type) {
       return 5;
    case 't':
       return 6;
+   case 'o':
+      return 7;
    }
 
    /* should never reach here */
@@ -74,7 +78,7 @@ OpenFilesScreen* OpenFilesScreen_new(const Process* process) {
    } else {
       this->pid = process->pid;
    }
-   return (OpenFilesScreen*) InfoScreen_init(&this->super, process, NULL, LINES - 2, "   FD TYPE    MODE DEVICE           SIZE       NODE  NAME");
+   return (OpenFilesScreen*) InfoScreen_init(&this->super, process, NULL, LINES - 2, "   FD TYPE    MODE DEVICE           SIZE     OFFSET       NODE  NAME");
 }
 
 void OpenFilesScreen_delete(Object* this) {
@@ -115,13 +119,14 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
       close(fdnull);
       char buffer[32] = {0};
       xSnprintf(buffer, sizeof(buffer), "%d", pid);
-      execlp("lsof", "lsof", "-P", "-p", buffer, "-F", NULL);
+      execlp("lsof", "lsof", "-P", "-o", "-p", buffer, "-F", NULL);
       exit(127);
    }
    close(fdpair[1]);
 
    OpenFiles_Data* item = &(pdata->data);
    OpenFiles_FileData* fdata = NULL;
+   bool lsofIncludesFileSize = false;
 
    FILE* fd = fdopen(fdpair[0], "r");
    if (!fd) {
@@ -155,8 +160,17 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
       case 't':  /* file's type */
       {
          size_t index = getIndexForType(cmd);
-         free(item->data[index]);
+         free_and_xStrdup(&item->data[index], line + 1);
-         item->data[index] = xStrdup(line + 1);
+         break;
+      }
+      case 'o':  /* file's offset */
+      {
+         size_t index = getIndexForType(cmd);
+         if (String_startsWith(line + 1, "0t")) {
+            free_and_xStrdup(&item->data[index], line + 3);
+         } else {
+            free_and_xStrdup(&item->data[index], line + 1);
+         }
          break;
       }
       case 'c':  /* process command name  */
@@ -166,7 +180,6 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
       case 'k':  /* link count */
       case 'l':  /* file's lock status */
       case 'L':  /* process login name */
-      case 'o':  /* file's offset */
       case 'p':  /* process ID */
       case 'P':  /* protocol name */
       case 'R':  /* parent process ID */
@@ -175,6 +188,10 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
          /* ignore */
          break;
       }
+
+      if (cmd == 's')
+         lsofIncludesFileSize = true;
+
       free(line);
    }
    fclose(fd);
@@ -191,6 +208,25 @@ static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
       pdata->error = WEXITSTATUS(wstatus);
    }
 
+   /* We got all information we need; no post-processing needed */
+   if (lsofIncludesFileSize)
+      return pdata;
+
+   /* On linux, `lsof -o -F` omits SIZE, so add it back. */
+   /* On macOS, `lsof -o -F` includes SIZE, so this block isn't needed.  If no open files have a filesize, this will still run, unfortunately. */
+   size_t fileSizeIndex = getIndexForType('s');
+   for (fdata = pdata->files; fdata != NULL; fdata = fdata->next) {
+      item = &fdata->data;
+      const char* filename = getDataForType(item, 'n');
+
+      struct stat st;
+      if (stat(filename, &st) == 0) {
+         char fileSizeBuf[21]; /* 20 (long long) + 1 (NULL) */
+         xSnprintf(fileSizeBuf, sizeof(fileSizeBuf), "%"PRIu64, st.st_size); /* st.st_size is long long on macOS, long on linux */
+         free_and_xStrdup(&item->data[fileSizeIndex], fileSizeBuf);
+      }
+   }
+
    return pdata;
 }
 
@@ -213,14 +249,15 @@ static void OpenFilesScreen_scan(InfoScreen* this) {
       while (fdata) {
          OpenFiles_Data* data = &fdata->data;
          size_t lenN = strlen(getDataForType(data, 'n'));
-         size_t sizeEntry = 5 + 7 + 4 + 10 + 10 + 10 + lenN + 7 /*spaces*/ + 1 /*null*/;
+         size_t sizeEntry = 5 + 7 + 4 + 10 + 10 + 10 + 10 + lenN + 8 /*spaces*/ + 1 /*null*/;
          char entry[sizeEntry];
-         xSnprintf(entry, sizeof(entry), "%5.5s %-7.7s %-4.4s %-10.10s %10.10s %10.10s  %s",
+         xSnprintf(entry, sizeof(entry), "%5.5s %-7.7s %-4.4s %-10.10s %10.10s %10.10s %10.10s  %s",
                    getDataForType(data, 'f'),
                    getDataForType(data, 't'),
                    getDataForType(data, 'a'),
                    getDataForType(data, 'D'),
                    getDataForType(data, 's'),
+                   getDataForType(data, 'o'),
                    getDataForType(data, 'i'),
                    getDataForType(data, 'n'));
          InfoScreen_addLine(this, entry);

OpenFilesScreen.h

@@ -3,7 +3,7 @@
 /*
 htop - OpenFilesScreen.h
 (C) 2005-2006 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

OptionItem.c

@@ -1,7 +1,7 @@
 /*
 htop - OptionItem.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

OptionItem.h

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

Panel.c

@@ -1,7 +1,7 @@
 /*
 htop - Panel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -453,7 +453,7 @@ HandlerResult Panel_selectByTyping(Panel* this, int ch) {
       }
 
       if (len < 99) {
-         buffer[len] = ch;
+         buffer[len] = (char) ch;
          buffer[len + 1] = '\0';
       }
 
@@ -470,7 +470,7 @@ HandlerResult Panel_selectByTyping(Panel* this, int ch) {
 
          // if current word did not match,
          // retry considering the character the start of a new word.
-         buffer[0] = ch;
+         buffer[0] = (char) ch;
          buffer[1] = '\0';
       }
 

Panel.h

@@ -3,7 +3,7 @@
 /*
 htop - Panel.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -67,7 +67,7 @@ struct Panel_ {
    int selectedLen;
    void* eventHandlerState;
    int scrollV;
-   short scrollH;
+   int scrollH;
    bool needsRedraw;
    bool wasFocus;
    FunctionBar* currentBar;

Process.c

@@ -2,7 +2,7 @@
 htop - Process.c
 (C) 2004-2015 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -41,17 +41,33 @@ static const char* const kthreadID = "KTHREAD";
 
 static uid_t Process_getuid = (uid_t)-1;
 
-int Process_pidDigits = 7;
+int Process_pidDigits = PROCESS_MIN_PID_DIGITS;
+int Process_uidDigits = PROCESS_MIN_UID_DIGITS;
 
 void Process_setupColumnWidths() {
    int maxPid = Platform_getMaxPid();
    if (maxPid == -1)
       return;
 
+   if (maxPid < (int)pow(10, PROCESS_MIN_PID_DIGITS)) {
+      Process_pidDigits = PROCESS_MIN_PID_DIGITS;
+      return;
+   }
+
    Process_pidDigits = ceil(log10(maxPid));
    assert(Process_pidDigits <= PROCESS_MAX_PID_DIGITS);
 }
 
+void Process_setUidColumnWidth(uid_t maxUid) {
+   if (maxUid < (uid_t)pow(10, PROCESS_MIN_UID_DIGITS)) {
+      Process_uidDigits = PROCESS_MIN_UID_DIGITS;
+      return;
+   }
+
+   Process_uidDigits = ceil(log10(maxUid));
+   assert(Process_uidDigits <= PROCESS_MAX_UID_DIGITS);
+}
+
 void Process_printBytes(RichString* str, unsigned long long number, bool coloring) {
    char buffer[16];
    int len;
@@ -399,7 +415,7 @@ void Process_makeCommandStr(Process* this) {
     * - a user thread and showThreadNames is not set */
    if (Process_isKernelThread(this))
       return;
-   if (this->state == 'Z' && !this->mergedCommand.str)
+   if (this->state == ZOMBIE && !this->mergedCommand.str)
       return;
    if (Process_isUserlandThread(this) && settings->showThreadNames && (showThreadNames == mc->prevShowThreadNames))
       return;
@@ -511,6 +527,12 @@ void Process_makeCommandStr(Process* this) {
 
       if (cmdlineBasenameEnd > cmdlineBasenameStart)
          WRITE_HIGHLIGHT(showProgramPath ? cmdlineBasenameStart : 0, cmdlineBasenameEnd - cmdlineBasenameStart, baseAttr, CMDLINE_HIGHLIGHT_FLAG_BASENAME);
+
+      if (this->procExeDeleted)
+         WRITE_HIGHLIGHT(showProgramPath ? cmdlineBasenameStart : 0, cmdlineBasenameEnd - cmdlineBasenameStart, delExeAttr, CMDLINE_HIGHLIGHT_FLAG_DELETED);
+      else if (this->usesDeletedLib)
+         WRITE_HIGHLIGHT(showProgramPath ? cmdlineBasenameStart : 0, cmdlineBasenameEnd - cmdlineBasenameStart, delLibAttr, CMDLINE_HIGHLIGHT_FLAG_DELETED);
+
       (void)stpcpyWithNewlineConversion(str, cmdline + (showProgramPath ? 0 : cmdlineBasenameStart));
 
       return;
@@ -727,6 +749,28 @@ void Process_printPercentage(float val, char* buffer, int n, int* attr) {
    }
 }
 
+static inline char processStateChar(ProcessState state) {
+   switch (state) {
+      case UNKNOWN: return '?';
+      case RUNNABLE: return 'U';
+      case RUNNING: return 'R';
+      case QUEUED: return 'Q';
+      case WAITING: return 'W';
+      case UNINTERRUPTIBLE_WAIT: return 'D';
+      case BLOCKED: return 'B';
+      case PAGING: return 'P';
+      case STOPPED: return 'T';
+      case TRACED: return 't';
+      case ZOMBIE: return 'Z';
+      case DEFUNCT: return 'X';
+      case IDLE: return 'I';
+      case SLEEPING: return 'S';
+      default:
+         assert(0);
+         return '!';
+   }
+}
+
 void Process_writeField(const Process* this, RichString* str, ProcessField field) {
    char buffer[256];
    size_t n = sizeof(buffer);
@@ -861,25 +905,35 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
    case SESSION: xSnprintf(buffer, n, "%*d ", Process_pidDigits, this->session); break;
    case STARTTIME: xSnprintf(buffer, n, "%s", this->starttime_show); break;
    case STATE:
-      xSnprintf(buffer, n, "%c ", this->state);
+      xSnprintf(buffer, n, "%c ", processStateChar(this->state));
       switch (this->state) {
-#ifdef HTOP_NETBSD
+         case RUNNABLE:
-         case 'P':
+         case RUNNING:
-#else
+         case TRACED:
-         case 'R':
-#endif
             attr = CRT_colors[PROCESS_RUN_STATE];
             break;
-         case 'D':
+
+         case BLOCKED:
+         case DEFUNCT:
+         case STOPPED:
+         case ZOMBIE:
             attr = CRT_colors[PROCESS_D_STATE];
             break;
-         case 'I':
+
-         case 'S':
+         case QUEUED:
+         case WAITING:
+         case UNINTERRUPTIBLE_WAIT:
+         case IDLE:
+         case SLEEPING:
             attr = CRT_colors[PROCESS_SHADOW];
             break;
+
+         case UNKNOWN:
+         case PAGING:
+            break;
       }
       break;
-   case ST_UID: xSnprintf(buffer, n, "%5d ", this->st_uid); break;
+   case ST_UID: xSnprintf(buffer, n, "%*d ", Process_uidDigits, this->st_uid); break;
    case TIME: Process_printTime(str, this->time, coloring); return;
    case TGID:
       if (this->tgid == this->pid)
@@ -902,11 +956,11 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
          attr = CRT_colors[PROCESS_SHADOW];
 
       if (this->user) {
-         Process_printLeftAlignedField(str, attr, this->user, 9);
+         Process_printLeftAlignedField(str, attr, this->user, 10);
          return;
       }
 
-      xSnprintf(buffer, n, "%-9d ", this->st_uid);
+      xSnprintf(buffer, n, "%-10d ", this->st_uid);
       break;
    default:
       if (DynamicColumn_writeField(this, str, field))
@@ -1050,44 +1104,6 @@ int Process_compare(const void* v1, const void* v2) {
    return (Settings_getActiveDirection(settings) == 1) ? result : -result;
 }
 
-static uint8_t stateCompareValue(char state) {
-   switch (state) {
-
-   case 'S':
-      return 10;
-
-   case 'I':
-      return 9;
-
-   case 'X':
-      return 8;
-
-   case 'Z':
-      return 7;
-
-   case 't':
-      return 6;
-
-   case 'T':
-      return 5;
-
-   case 'L':
-      return 4;
-
-   case 'D':
-      return 3;
-
-   case 'R':
-      return 2;
-
-   case '?':
-      return 1;
-
-   default:
-      return 0;
-   }
-}
-
 int Process_compareByKey_Base(const Process* p1, const Process* p2, ProcessField key) {
    int r;
 
@@ -1142,7 +1158,7 @@ int Process_compareByKey_Base(const Process* p1, const Process* p2, ProcessField
       r = SPACESHIP_NUMBER(p1->starttime_ctime, p2->starttime_ctime);
       return r != 0 ? r : SPACESHIP_NUMBER(p1->pid, p2->pid);
    case STATE:
-      return SPACESHIP_NUMBER(stateCompareValue(p1->state), stateCompareValue(p2->state));
+      return SPACESHIP_NUMBER(p1->state, p2->state);
    case ST_UID:
       return SPACESHIP_NUMBER(p1->st_uid, p2->st_uid);
    case TIME:

Process.h

@@ -4,7 +4,7 @@
 htop - Process.h
 (C) 2004-2015 Hisham H. Muhammad
 (C) 2020 Red Hat, Inc.  All Rights Reserved.
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -60,6 +60,26 @@ typedef enum ProcessField_ {
    LAST_PROCESSFIELD
 } ProcessField;
 
+/* Core process states (shared by platforms)
+ * NOTE: The enum has an ordering that is important!
+ * See processStateChar in process.c for ProcessSate -> letter mapping */
+typedef enum ProcessState_ {
+   UNKNOWN = 1,
+   RUNNABLE,
+   RUNNING,
+   QUEUED,
+   WAITING,
+   UNINTERRUPTIBLE_WAIT,
+   BLOCKED,
+   PAGING,
+   STOPPED,
+   TRACED,
+   ZOMBIE,
+   DEFUNCT,
+   IDLE,
+   SLEEPING
+} ProcessState;
+
 struct Settings_;
 
 /* Holds information about regions of the cmdline that should be
@@ -202,20 +222,8 @@ typedef struct Process_ {
    /* Number of major faults the process has made which have required loading a memory page from disk */
    unsigned long int majflt;
 
-   /*
+   /* Process state enum field (platform dependent) */
-    * Process state (platform dependent):
+   ProcessState state;
-    *   D  -  Waiting
-    *   I  -  Idle
-    *   L  -  Acquiring lock
-    *   R  -  Running
-    *   S  -  Sleeping
-    *   T  -  Stopped (on a signal)
-    *   X  -  Dead
-    *   Z  -  Zombie
-    *   t  -  Tracing stop
-    *   ?  -  Unknown
-    */
-   char state;
 
    /* Whether the process was updated during the current scan */
    bool updated;
@@ -278,8 +286,12 @@ 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];
+#define PROCESS_MIN_PID_DIGITS 5
 #define PROCESS_MAX_PID_DIGITS 19
+#define PROCESS_MIN_UID_DIGITS 5
+#define PROCESS_MAX_UID_DIGITS 19
 extern int Process_pidDigits;
+extern int Process_uidDigits;
 
 typedef Process* (*Process_New)(const struct Settings_*);
 typedef void (*Process_WriteField)(const Process*, RichString*, ProcessField);
@@ -337,6 +349,9 @@ static inline bool Process_isThread(const Process* this) {
 
 void Process_setupColumnWidths(void);
 
+/* Sets the size of the UID column based on the passed UID */
+void Process_setUidColumnWidth(uid_t maxUid);
+
 /* Takes number in bytes (base 1024). Prints 6 columns. */
 void Process_printBytes(RichString* str, unsigned long long number, bool coloring);
 

ProcessList.c

@@ -1,7 +1,7 @@
 /*
 htop - ProcessList.c
 (C) 2004,2005 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -105,13 +105,19 @@ static const char* alignedProcessFieldTitle(const ProcessList* this, ProcessFiel
    if (!title)
       return "- ";
 
-   if (!Process_fields[field].pidColumn)
+   if (Process_fields[field].pidColumn) {
-      return title;
+      static char titleBuffer[PROCESS_MAX_PID_DIGITS + sizeof(" ")];
+      xSnprintf(titleBuffer, sizeof(titleBuffer), "%*s ", Process_pidDigits, title);
+      return titleBuffer;
+   }
 
-   static char titleBuffer[PROCESS_MAX_PID_DIGITS + /* space */ 1 + /* null-terminator */ + 1];
+   if (field == ST_UID) {
-   xSnprintf(titleBuffer, sizeof(titleBuffer), "%*s ", Process_pidDigits, title);
+      static char titleBuffer[PROCESS_MAX_UID_DIGITS + sizeof(" ")];
+      xSnprintf(titleBuffer, sizeof(titleBuffer), "%*s ", Process_uidDigits, title);
+      return titleBuffer;
+   }
 
-   return titleBuffer;
+   return title;
 }
 
 void ProcessList_printHeader(const ProcessList* this, RichString* header) {
@@ -626,10 +632,15 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
 
    ProcessList_goThroughEntries(this, false);
 
+   uid_t maxUid = 0;
    for (int i = Vector_size(this->processes) - 1; i >= 0; i--) {
       Process* p = (Process*) Vector_get(this->processes, i);
       Process_makeCommandStr(p);
 
+      // keep track of the highest UID for column scaling
+      if (p->st_uid > maxUid)
+         maxUid = p->st_uid;
+
       if (p->tombStampMs > 0) {
          // remove tombed process
          if (this->monotonicMs >= p->tombStampMs) {
@@ -647,6 +658,9 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
       }
    }
 
+   // 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
       //

ProcessList.h

@@ -3,7 +3,7 @@
 /*
 htop - ProcessList.h
 (C) 2004,2005 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

ProcessLocksScreen.c

@@ -1,7 +1,7 @@
 /*
 htop - ProcessLocksScreen.c
 (C) 2020 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

ProcessLocksScreen.h

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

ProvideCurses.h

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

README

@@ -6,7 +6,7 @@
 [![IRC #htop](https://img.shields.io/badge/IRC-htop-blue.svg)](https://web.libera.chat/#htop)
 [![GitHub Release](https://img.shields.io/github/release/htop-dev/htop.svg)](https://github.com/htop-dev/htop/releases/latest)
 [![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)
+[![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)
 
@@ -38,7 +38,7 @@ List of build-time dependencies:
   * `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:
+> `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.
 >
@@ -47,7 +47,7 @@ List of build-time dependencies:
 List of additional build-time dependencies (based on feature flags):
 *  `sensors`
 *  `hwloc`
-*  `libcap`
+*  `libcap` (v2.21 or later)
 *  `libnl-3`
 
 Install these and other required packages for C development from your package manager.
@@ -138,12 +138,12 @@ To install on the local system run `make install`. By default `make install` ins
 `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 to optionally dependencies (i.e. `libsensors`, `libsystemd`) is present.
+* `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 the POSIX 1003.1e, is always required when `--enable-capabilities` was used to configure `htop`.
+* `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 lib as `htop` runs.
+`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.
@@ -155,15 +155,15 @@ See the manual page (`man htop`) or the help menu (**F1** or **h** inside `htop`
 
 ## Support
 
-If you have trouble running `htop` please consult your Operating System / Linux distribution documentation for getting support and filing bugs.
+If you have trouble running `htop` please consult your operating system / Linux distribution documentation for getting support and filing bugs.
 
 ## Bugs, development feedback
 
-We have a [development mailing list](https://htop.dev/mailinglist.html). Feel free to subscribe for release announcements or asking questions on the development of htop.
+We have a [development mailing list](https://htop.dev/mailinglist.html). Feel free to subscribe for release announcements or asking questions on the development of `htop`.
 
 You can also join our IRC channel [#htop on Libera.Chat](https://web.libera.chat/#htop) and talk to the developers there.
 
-If you have found an issue within the source of htop, please check whether this has already been reported in our [GitHub issue tracker](https://github.com/htop-dev/htop/issues).
+If you have found an issue within the source of `htop`, please check whether this has already been reported in our [GitHub issue tracker](https://github.com/htop-dev/htop/issues).
 If not, please file a new issue describing the problem you have found, the potential location in the source code you are referring to and a possible fix if available.
 
 ## History
@@ -174,4 +174,4 @@ In 2020 a [team](https://github.com/orgs/htop-dev/people) took over the developm
 
 ## License
 
-GNU General Public License, version 2 (GPL-2.0)
+GNU General Public License, version 2 (GPL-2.0) or, at your option, any later version.

RichString.c

@@ -1,7 +1,7 @@
 /*
 htop - RichString.c
 (C) 2004,2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

RichString.h

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

ScreenManager.c

@@ -1,7 +1,7 @@
 /*
 htop - ScreenManager.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -88,7 +88,7 @@ void ScreenManager_resize(ScreenManager* this) {
    Panel_move(panel, lastX, y1_header);
 }
 
-static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTimeout, bool* redraw, bool* rescan, bool* timedOut) {
+static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTimeout, bool* redraw, bool* rescan, bool* timedOut, bool *force_redraw) {
    ProcessList* pl = this->header->pl;
 
    Platform_gettime_realtime(&pl->realtime, &pl->realtimeMs);
@@ -103,6 +103,7 @@ static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTi
 
    if (*rescan) {
       *oldTime = newTime;
+      int oldUidDigits = Process_uidDigits;
       // 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
@@ -111,6 +112,10 @@ static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTi
          ProcessList_sort(pl);
          *sortTimeout = 1;
       }
+      // force redraw if the number of UID digits was changed
+      if (Process_uidDigits != oldUidDigits) {
+         *force_redraw = true;
+      }
       *redraw = true;
    }
    if (*redraw) {
@@ -153,7 +158,7 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
 
    while (!quit) {
       if (this->header) {
-         checkRecalculation(this, &oldTime, &sortTimeout, &redraw, &rescan, &timedOut);
+         checkRecalculation(this, &oldTime, &sortTimeout, &redraw, &rescan, &timedOut, &force_redraw);
       }
 
       if (redraw || force_redraw) {

ScreenManager.h

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

Settings.c

@@ -1,7 +1,7 @@
 /*
 htop - Settings.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -28,11 +28,7 @@ void Settings_delete(Settings* this) {
    free(this->filename);
    free(this->fields);
    for (unsigned int i = 0; i < HeaderLayout_getColumns(this->hLayout); i++) {
-      if (this->hColumns[i].names) {
+      String_freeArray(this->hColumns[i].names);
-         for (uint8_t j = 0; j < this->hColumns[i].len; j++)
-            free(this->hColumns[i].names[j]);
-         free(this->hColumns[i].names);
-      }
       free(this->hColumns[i].modes);
    }
    free(this->hColumns);
@@ -65,16 +61,51 @@ static void Settings_readMeterModes(Settings* this, const char* line, unsigned i
    this->hColumns[column].modes = modes;
 }
 
+static bool Settings_validateMeters(Settings* this) {
+   const size_t colCount = HeaderLayout_getColumns(this->hLayout);
+
+   for (size_t column = 0; column < colCount; column++) {
+      char** names = this->hColumns[column].names;
+      const int* modes = this->hColumns[column].modes;
+      const size_t len = this->hColumns[column].len;
+
+      if (!names || !modes || !len)
+         return false;
+
+      // Check for each mode there is an entry with a non-NULL name
+      for (size_t meterIdx = 0; meterIdx < len; meterIdx++)
+         if (!names[meterIdx])
+            return false;
+
+      if (names[len])
+         return false;
+   }
+
+   return true;
+}
+
 static void Settings_defaultMeters(Settings* this, unsigned int initialCpuCount) {
    int sizes[] = { 3, 3 };
+
    if (initialCpuCount > 4 && initialCpuCount <= 128) {
       sizes[1]++;
    }
-   for (int i = 0; i < 2; i++) {
+
+   // Release any previously allocated memory
+   for (size_t i = 0; i < HeaderLayout_getColumns(this->hLayout); i++) {
+      String_freeArray(this->hColumns[i].names);
+      free(this->hColumns[i].modes);
+   }
+   free(this->hColumns);
+
+   this->hLayout = HF_TWO_50_50;
+   this->hColumns = xCalloc(HeaderLayout_getColumns(this->hLayout), sizeof(MeterColumnSetting));
+   for (size_t i = 0; i < 2; i++) {
       this->hColumns[i].names = xCalloc(sizes[i] + 1, sizeof(char*));
       this->hColumns[i].modes = xCalloc(sizes[i], sizeof(int));
       this->hColumns[i].len = sizes[i];
    }
+
    int r = 0;
 
    if (initialCpuCount > 128) {
@@ -181,8 +212,9 @@ static bool Settings_read(Settings* this, const char* fileName, unsigned int ini
          this->config_version = atoi(option[1]);
          if (this->config_version > CONFIG_READER_MIN_VERSION) {
             // the version of the config file on disk is newer than what we can read
-            fprintf(stderr, "WARNING: %s specifies configuration format version v%d, but this %s binary supports up to v%d\n.", fileName, this->config_version, PACKAGE, CONFIG_READER_MIN_VERSION);
+            fprintf(stderr, "WARNING: %s specifies configuration format\n", fileName);
-            fprintf(stderr, "         The configuration version will be downgraded to v%d when %s exits.\n", CONFIG_READER_MIN_VERSION, PACKAGE);
+            fprintf(stderr, "         version v%d, but this %s binary only supports up to version v%d.\n", this->config_version, PACKAGE, CONFIG_READER_MIN_VERSION);
+            fprintf(stderr, "         The configuration file will be downgraded to v%d when %s exits.\n", CONFIG_READER_MIN_VERSION, PACKAGE);
             String_freeArray(option);
             fclose(fd);
             return false;
@@ -304,7 +336,7 @@ static bool Settings_read(Settings* this, const char* fileName, unsigned int ini
       String_freeArray(option);
    }
    fclose(fd);
-   if (!didReadMeters) {
+   if (!didReadMeters || !Settings_validateMeters(this)) {
       Settings_defaultMeters(this, initialCpuCount);
    }
    return didReadAny;
@@ -328,7 +360,7 @@ static void writeFields(FILE* fd, const ProcessField* fields, Hashtable* columns
 
 static void writeMeters(const Settings* this, FILE* fd, char separator, unsigned int column) {
    const char* sep = "";
-   for (uint8_t i = 0; i < this->hColumns[column].len; i++) {
+   for (size_t i = 0; i < this->hColumns[column].len; i++) {
       fprintf(fd, "%s%s", sep, this->hColumns[column].names[i]);
       sep = " ";
    }
@@ -337,7 +369,7 @@ static void writeMeters(const Settings* this, FILE* fd, char separator, unsigned
 
 static void writeMeterModes(const Settings* this, FILE* fd, char separator, unsigned int column) {
    const char* sep = "";
-   for (uint8_t i = 0; i < this->hColumns[column].len; i++) {
+   for (size_t i = 0; i < this->hColumns[column].len; i++) {
       fprintf(fd, "%s%d", sep, this->hColumns[column].modes[i]);
       sep = " ";
    }
@@ -586,7 +618,7 @@ void Settings_setHeaderLayout(Settings* this, HeaderLayout hLayout) {
    } else if (newColumns < oldColumns) {
       for (unsigned int i = newColumns; i < oldColumns; i++) {
          if (this->hColumns[i].names) {
-            for (uint8_t j = 0; j < this->hColumns[i].len; j++)
+            for (size_t j = 0; j < this->hColumns[i].len; j++)
                free(this->hColumns[i].names[j]);
             free(this->hColumns[i].names);
          }

Settings.h

@@ -3,7 +3,7 @@
 /*
 htop - Settings.h
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -22,7 +22,7 @@ in the source distribution for its full text.
 #define CONFIG_READER_MIN_VERSION 2
 
 typedef struct {
-   uint8_t len;
+   size_t len;
    char** names;
    int* modes;
 } MeterColumnSetting;

SignalsPanel.c

@@ -1,7 +1,7 @@
 /*
 htop - SignalsPanel.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

SignalsPanel.h

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

SwapMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - SwapMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

SwapMeter.h

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

SysArchMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - SysArchMeter.c
 (C) 2021 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

SysArchMeter.h

@@ -3,7 +3,7 @@
 /*
 htop - SysArchMeter.h
 (C) 2021 htop dev team
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 #include "Meter.h"

TasksMeter.c

@@ -1,7 +1,7 @@
 /*
 htop - TasksMeter.c
 (C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 

TasksMeter.h

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