Release 3.1.1

Based on https://cgit.freebsd.org/src/tree/lib/libdevstat/devstat.c
the following four functions call memory allocation functions:

- devstat_getdevs()
- devstat_selectdevs()
- devstat_buildmatch()
- get_devstat_kvm()

.travis.yml

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

Action.c

@@ -1,7 +1,7 @@
 /*
 htop - Action.c
 (C) 2015 Hisham H. Muhammad
-Released under the GNU GPLv2, see the COPYING file
+Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
@@ -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.
 */
 
@@ -63,9 +63,9 @@ Affinity* Affinity_get(const Process* proc, ProcessList* pl) {
             Affinity_add(affinity, i);
          }
       } else {
-         unsigned int id;
-         hwloc_bitmap_foreach_begin(id, cpuset);
-         Affinity_add(affinity, id);
+         int id;
+         hwloc_bitmap_foreach_begin(id, cpuset)
+            Affinity_add(affinity, (unsigned)id);
          hwloc_bitmap_foreach_end();
       }
    }

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.
 */
 
@@ -425,9 +425,9 @@ Affinity* AffinityPanel_getAffinity(Panel* super, ProcessList* pl) {
    Affinity* affinity = Affinity_new(pl);
 
    #ifdef HAVE_LIBHWLOC
-   unsigned int i;
+   int i;
    hwloc_bitmap_foreach_begin(i, this->workCpuset)
-   Affinity_add(affinity, i);
+      Affinity_add(affinity, (unsigned)i);
    hwloc_bitmap_foreach_end();
    #else
    for (int i = 0; i < Vector_size(this->cpuids); i++) {

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.
 */
 
@@ -52,9 +52,9 @@ static void CPUMeter_init(Meter* this) {
 // Custom uiName runtime logic to include the param (processor)
 static void CPUMeter_getUiName(const Meter* this, char* buffer, size_t length) {
    if (this->param > 0)
-      xSnprintf(buffer, sizeof(length), "%s %u", Meter_uiName(this), this->param);
+      xSnprintf(buffer, length, "%s %u", Meter_uiName(this), this->param);
    else
-      xSnprintf(buffer, sizeof(length), "%s", Meter_uiName(this));
+      xSnprintf(buffer, length, "%s", Meter_uiName(this));
 }
 
 static void CPUMeter_updateValues(Meter* this) {
@@ -381,6 +381,7 @@ const MeterClass AllCPUs2Meter_class = {
    },
    .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "AllCPUs2",
@@ -401,6 +402,7 @@ const MeterClass LeftCPUsMeter_class = {
    },
    .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "LeftCPUs",
@@ -421,6 +423,7 @@ const MeterClass RightCPUsMeter_class = {
    },
    .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "RightCPUs",
@@ -441,6 +444,7 @@ const MeterClass LeftCPUs2Meter_class = {
    },
    .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "LeftCPUs2",
@@ -461,6 +465,7 @@ const MeterClass RightCPUs2Meter_class = {
    },
    .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "RightCPUs2",
@@ -481,6 +486,7 @@ const MeterClass AllCPUs4Meter_class = {
    },
    .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "AllCPUs4",
@@ -501,6 +507,7 @@ const MeterClass LeftCPUs4Meter_class = {
    },
    .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "LeftCPUs4",
@@ -521,6 +528,7 @@ const MeterClass RightCPUs4Meter_class = {
    },
    .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "RightCPUs4",
@@ -541,6 +549,7 @@ const MeterClass AllCPUs8Meter_class = {
    },
    .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "AllCPUs8",
@@ -561,6 +570,7 @@ const MeterClass LeftCPUs8Meter_class = {
    },
    .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "LeftCPUs8",
@@ -581,6 +591,7 @@ const MeterClass RightCPUs8Meter_class = {
    },
    .updateValues = AllCPUsMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .total = 100.0,
    .attributes = CPUMeter_attributes,
    .name = "RightCPUs8",

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))
 
@@ -138,7 +146,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_GIGABYTES] = ColorPair(Green, Black),
       [PROCESS_BASENAME] = A_BOLD | ColorPair(Cyan, Black),
       [PROCESS_TREE] = ColorPair(Cyan, Black),
-      [PROCESS_R_STATE] = ColorPair(Green, Black),
+      [PROCESS_RUN_STATE] = ColorPair(Green, Black),
       [PROCESS_D_STATE] = A_BOLD | ColorPair(Red, Black),
       [PROCESS_HIGH_PRIORITY] = ColorPair(Red, Black),
       [PROCESS_LOW_PRIORITY] = ColorPair(Green, Black),
@@ -240,7 +248,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_GIGABYTES] = A_BOLD,
       [PROCESS_BASENAME] = A_BOLD,
       [PROCESS_TREE] = A_BOLD,
-      [PROCESS_R_STATE] = A_BOLD,
+      [PROCESS_RUN_STATE] = A_BOLD,
       [PROCESS_D_STATE] = A_BOLD,
       [PROCESS_HIGH_PRIORITY] = A_BOLD,
       [PROCESS_LOW_PRIORITY] = A_DIM,
@@ -342,7 +350,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_GIGABYTES] = ColorPair(Green, White),
       [PROCESS_BASENAME] = ColorPair(Blue, White),
       [PROCESS_TREE] = ColorPair(Green, White),
-      [PROCESS_R_STATE] = ColorPair(Green, White),
+      [PROCESS_RUN_STATE] = ColorPair(Green, White),
       [PROCESS_D_STATE] = A_BOLD | ColorPair(Red, White),
       [PROCESS_HIGH_PRIORITY] = ColorPair(Red, White),
       [PROCESS_LOW_PRIORITY] = ColorPair(Green, White),
@@ -444,7 +452,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_GIGABYTES] = ColorPair(Green, Black),
       [PROCESS_BASENAME] = ColorPair(Green, Black),
       [PROCESS_TREE] = ColorPair(Blue, Black),
-      [PROCESS_R_STATE] = ColorPair(Green, Black),
+      [PROCESS_RUN_STATE] = ColorPair(Green, Black),
       [PROCESS_D_STATE] = A_BOLD | ColorPair(Red, Black),
       [PROCESS_HIGH_PRIORITY] = ColorPair(Red, Black),
       [PROCESS_LOW_PRIORITY] = ColorPair(Green, Black),
@@ -546,7 +554,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_GIGABYTES] = ColorPair(Green, Blue),
       [PROCESS_BASENAME] = A_BOLD | ColorPair(Cyan, Blue),
       [PROCESS_TREE] = ColorPair(Cyan, Blue),
-      [PROCESS_R_STATE] = ColorPair(Green, Blue),
+      [PROCESS_RUN_STATE] = ColorPair(Green, Blue),
       [PROCESS_D_STATE] = A_BOLD | ColorPair(Red, Blue),
       [PROCESS_HIGH_PRIORITY] = ColorPair(Red, Blue),
       [PROCESS_LOW_PRIORITY] = ColorPair(Green, Blue),
@@ -652,7 +660,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_THREAD_BASENAME] = A_BOLD | ColorPair(Blue, Black),
       [PROCESS_COMM] = ColorPair(Magenta, Black),
       [PROCESS_THREAD_COMM] = ColorPair(Yellow, Black),
-      [PROCESS_R_STATE] = ColorPair(Green, Black),
+      [PROCESS_RUN_STATE] = ColorPair(Green, Black),
       [PROCESS_D_STATE] = A_BOLD | ColorPair(Red, Black),
       [PROCESS_HIGH_PRIORITY] = ColorPair(Red, Black),
       [PROCESS_LOW_PRIORITY] = ColorPair(Green, Black),
@@ -772,6 +780,8 @@ static void dumpStderr(void) {
 
    fsync(STDERR_FILENO);
    dup2(stderrRedirectBackupFd, STDERR_FILENO);
+   close(stderrRedirectBackupFd);
+   stderrRedirectBackupFd = -1;
    lseek(stderrRedirectNewFd, 0, SEEK_SET);
 
    bool header = false;
@@ -886,6 +896,10 @@ void CRT_init(const Settings* settings, bool allowUnicode) {
    }
 
    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
+#endif
       define_key("\033[H", KEY_HOME);
       define_key("\033[F", KEY_END);
       define_key("\033[7~", KEY_HOME);
@@ -906,6 +920,10 @@ void CRT_init(const Settings* settings, bool allowUnicode) {
          sequence[1] = c;
          define_key(sequence, KEY_ALT('A' + (c - 'a')));
       }
+#ifdef HTOP_NETBSD
+IGNORE_WCASTQUAL_END
+#undef define_key
+#endif
    }
 
    CRT_installSignalHandlers();
@@ -998,6 +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();
 
@@ -1012,7 +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
 
@@ -1038,16 +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.
 */
 
@@ -74,7 +74,7 @@ typedef enum ColorElements_ {
    PROCESS_MEGABYTES,
    PROCESS_GIGABYTES,
    PROCESS_TREE,
-   PROCESS_R_STATE,
+   PROCESS_RUN_STATE,
    PROCESS_D_STATE,
    PROCESS_BASENAME,
    PROCESS_HIGH_PRIORITY,
@@ -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_WHEELDOWN KEY_F(21)
-#define KEY_RECLICK   KEY_F(22)
+#define KEY_WHEELUP   KEY_F(30)
+#define KEY_WHEELDOWN KEY_F(31)
+#define KEY_RECLICK   KEY_F(32)
 #define KEY_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.
 */
 
@@ -40,7 +40,7 @@ static void CategoriesPanel_delete(Object* object) {
 
 static void CategoriesPanel_makeMetersPage(CategoriesPanel* this) {
    size_t columns = HeaderLayout_getColumns(this->scr->header->headerLayout);
-   MetersPanel** meterPanels = xMallocArray(columns, sizeof(MetersPanel));
+   MetersPanel** meterPanels = xMallocArray(columns, sizeof(MetersPanel*));
 
    for (size_t i = 0; i < columns; i++) {
       char titleBuffer[32];

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

@@ -1,5 +1,22 @@
-What's new in version 3.1.0
+What's new in version 3.1.1
 
+* Update license headers to explicitly say GPLv2+
+* Document minimum version for libcap (thanks to James Brown)
+* Fix mouse wheel collision with autogroups nice adjustment
+* Adjust Makefile.am macro definitions for older automake versions
+* Ensure consistent reporting of MemoryMeter 'used' memory
+* Report hugepage memory as real and used memory (as before)
+* Handle procExeDeleted, usesDeletedLib without mergedCommandline mode
+* Validate meter configuration before proceeding beyond htoprc parsing
+* Properly release memory on partially read configuration
+* Handle interrupted sampling from within libpcp PDU transfers
+* On Linux, provide O_PATH value if not defined
+* On Linux, always compute procExeDeleted if already set
+* Workaround for Rosetta 2 on Darwin (thanks to Alexander Momchilov)
+* Fix FreeBSD cmdline memory leak in Process_updateCmdline, and
+* Plug a Disk I/O meter memory leak on FreeBSD (thanks to Ximalas)
+
+What's new in version 3.1.0
 
 * Updated COPYING file to remove the PLPA exemption (appendix 2)
   With this change the license is now GPLv2 without any additional wording.
@@ -26,10 +43,11 @@ What's new in version 3.1.0
   Moving this column to be handled as a platform-independently available
   information simplifies the markup of the command line.
 * Introduce configuration file versioning and config_reader_min_version
-  Starting with this version the configuration file contains an version
+  Starting with this version the configuration file contains a version
   identifying the minimum version of the configuration parser needed to
   fully understand the configuration file format.
-  Old configuration file formats are automatically upgraded on startup.
+  Old configuration file formats are automatically upgraded when
+  saving the config file (htoprc).
 * Make the configuration parser friendlier to users (thanks to Bart Bakker)
   With this change only settings that cannot be parsed properly are
   reset to their defaults.
@@ -48,12 +66,12 @@ What's new in version 3.1.0
 * Option and key ("*") to collapse / expand all branches under PID 1
   (and PID 2 if kernel threads are shown) (thanks to Krishna Chaitanya)
 * Keep following a process when inverting the sort order, displaying
-  the help screen or hiding/unhiding userland threads
+  the help screen or hiding/unhiding userland threads.
   If a thread is currently selected the selection is updated to point
   to the thread's parent process. (thanks to Gonzalo, et.al.)
 * Reorder process scanning to be performed before updating the display
   of the meters in the header
-* Always check the user for a process for any changes
+* Always check the user for a process for any changes.
   This affects multiple platforms that previously didn't correctly handle
   the user field for a process to change at runtime (e.g. due to seteuid
   or similar syscalls).
@@ -105,14 +123,14 @@ What's new in version 3.1.0
 * Correctly color the ZFS ARC ratio (thanks to Ross Williams)
 * Bugfixes related to CPU time display/calculations for darwin on M1 systems
   (thanks to Alexander Momchilov)
-* Harmonize the handling of multiple batteries across different platforms
+* Harmonize the handling of multiple batteries across different platforms.
   The system is now considered to run on AC if at least one power supply
   marked as AC is found in the system.
   Battery capacity is summed up over all batteries found.
   This also changes the old behavior that batteries reported by the
   system after the first AC adapter where sometimes ignored.
-* Correctly handle multiple batteries on Darwin
-  Resolves a possible memory leak on systems with multiple batteries
+* Correctly handle multiple batteries on Darwin.
+  Resolves a possible memory leak on systems with multiple batteries.
 * Handle Linux Shmem being part of Cached in the MemoryMeter
 * Add SwapCached to the Linux swap meter (thanks to David Zarzycki)
 * Convert process time to days if applicable (thanks to David Zarzycki)
@@ -138,7 +156,7 @@ What's new in version 3.1.0
 * Add command line option to drop Linux capabilities
 * Support scheduler affinity on platforms beyond Linux
 * Report on any failure to write the configuration file
-* Cache stderr to be able to print assert messages
+* Cache stderr to be able to print assert messages.
   These messages are shown in case htop terminates unexpectedly.
 * Print current settings on crash
 * Reset signal handlers on program exit

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.
 */
 

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.
 */
 
@@ -118,12 +118,6 @@ const PanelClass ColumnsPanel_class = {
    .eventHandler = ColumnsPanel_eventHandler
 };
 
-typedef struct {
-   Panel* super;
-   unsigned int id;
-   unsigned int offset;
-} DynamicIterator;
-
 static void ColumnsPanel_add(Panel* super, unsigned int key, Hashtable* columns) {
    const char* name;
    if (key < LAST_PROCESSFIELD) {

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.
 */
 
@@ -47,7 +47,7 @@ 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"
@@ -393,10 +393,8 @@ int CommandLine_run(const char* name, int argc, char** argv) {
 
    /* Delete these last, since they can get accessed in the crash handler */
    Settings_delete(settings);
-   if (dc)
-      Hashtable_delete(dc);
-   if (dm)
-      Hashtable_delete(dm);
+   DynamicColumns_delete(dc);
+   DynamicMeters_delete(dm);
 
    return 0;
 }

CommandLine.h

@@ -4,7 +4,7 @@
 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.
 */
 

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.
 */
 

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.
 */
 

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.
 */
 

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.
 */
 
@@ -22,6 +22,13 @@ Hashtable* DynamicColumns_new(void) {
    return Platform_dynamicColumns();
 }
 
+void DynamicColumns_delete(Hashtable* dynamics) {
+   if (dynamics) {
+      Platform_dynamicColumnsDone(dynamics);
+      Hashtable_delete(dynamics);
+   }
+}
+
 const char* DynamicColumn_init(unsigned int key) {
    return Platform_dynamicColumnInit(key);
 }

DynamicColumn.h

@@ -21,6 +21,8 @@ typedef struct DynamicColumn_ {
 
 Hashtable* DynamicColumns_new(void);
 
+void DynamicColumns_delete(Hashtable* dynamics);
+
 const char* DynamicColumn_init(unsigned int key);
 
 const DynamicColumn* DynamicColumn_lookup(Hashtable* dynamics, unsigned int key);

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.
 */
 
@@ -38,6 +38,13 @@ Hashtable* DynamicMeters_new(void) {
    return Platform_dynamicMeters();
 }
 
+void DynamicMeters_delete(Hashtable* dynamics) {
+   if (dynamics) {
+      Platform_dynamicMetersDone(dynamics);
+      Hashtable_delete(dynamics);
+   }
+}
+
 typedef struct {
    unsigned int key;
    const char* name;

DynamicMeter.h

@@ -17,6 +17,8 @@ typedef struct DynamicMeter_ {
 
 Hashtable* DynamicMeters_new(void);
 
+void DynamicMeters_delete(Hashtable* dynamics);
+
 const char* DynamicMeter_lookup(Hashtable* dynamics, unsigned int key);
 
 bool DynamicMeter_search(Hashtable* dynamics, const char* name, unsigned int* key);

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.
 */
 
@@ -86,8 +86,9 @@ static void Header_addMeterByName(Header* this, const char* name, MeterModeId mo
    if (paren) {
       int ok = sscanf(paren, "(%10u)", &param); // CPUMeter
       if (!ok) {
-         char* end, dynamic[32] = {0};
+         char dynamic[32] = {0};
          if (sscanf(paren, "(%30s)", dynamic)) { // DynamicMeter
+            char* end;
             if ((end = strrchr(dynamic, ')')) == NULL)
                return;    // htoprc parse failure
             *end = '\0';
@@ -195,25 +196,28 @@ void Header_draw(const Header* this) {
    }
    const int width = COLS - pad;
    int x = pad;
-   float roundingLoss = 0.0f;
+   float roundingLoss = 0.0F;
 
    Header_forEachColumn(this, col) {
       Vector* meters = this->columns[col];
-      float colWidth = (float)width * HeaderLayout_layouts[this->headerLayout].widths[col] / 100.0f;
+      float colWidth = (float)width * HeaderLayout_layouts[this->headerLayout].widths[col] / 100.0F;
 
       roundingLoss += colWidth - floorf(colWidth);
-      if (roundingLoss >= 1.0f) {
-         colWidth += 1.0f;
-         roundingLoss -= 1.0f;
+      if (roundingLoss >= 1.0F) {
+         colWidth += 1.0F;
+         roundingLoss -= 1.0F;
       }
 
       for (int y = (pad / 2), i = 0; i < Vector_size(meters); i++) {
          Meter* meter = (Meter*) Vector_get(meters, i);
 
          float actualWidth = colWidth;
-         if (meter->mode == TEXT_METERMODE) {
+
+         /* Let meters in text mode expand to the right on empty neighbors;
+            except for multi column meters. */
+         if (meter->mode == TEXT_METERMODE && !Meter_isMultiColumn(meter)) {
             for (int j = 1; j < meter->columnWidthCount; j++) {
-               actualWidth += (float)width * HeaderLayout_layouts[this->headerLayout].widths[col + j] / 100.0f;
+               actualWidth += (float)width * HeaderLayout_layouts[this->headerLayout].widths[col + j] / 100.0F;
             }
          }
 

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.
 */
 
@@ -23,7 +23,7 @@ typedef struct Header_ {
    int height;
 } Header;
 
-#define Header_forEachColumn(this_, i_) for (size_t (i_)=0; (i_) < HeaderLayout_getColumns((this_)->headerLayout); ++(i_))
+#define Header_forEachColumn(this_, i_) for (size_t (i_)=0, H_fEC_numColumns_ = HeaderLayout_getColumns((this_)->headerLayout); (i_) < H_fEC_numColumns_; ++(i_))
 
 Header* Header_new(ProcessList* pl, Settings* settings, HeaderLayout hLayout);
 

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.
 */
 
@@ -82,6 +82,6 @@ HeaderOptionsPanel* HeaderOptionsPanel_new(Settings* settings, ScreenManager* sc
    for (int i = 0; i < LAST_HEADER_LAYOUT; i++) {
       Panel_add(super, (Object*) CheckItem_newByVal(HeaderLayout_layouts[i].description, false));
    }
-   CheckItem_set((CheckItem*)Panel_get(super, settings->hLayout), true);
+   CheckItem_set((CheckItem*)Panel_get(super, scr->header->headerLayout), true);
    return this;
 }

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.
 */
 

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.
 */
 
@@ -62,7 +62,13 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
       return IGNORED;
 
    /* reset on every normal key */
-   if (ch != ERR)
+   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) \
@@ -181,7 +189,6 @@ linux_platform_sources = \
 
 if HTOP_LINUX
 AM_LDFLAGS += -rdynamic
-myhtopplatprogram = htop
 myhtopplatheaders = $(linux_platform_headers)
 myhtopplatsources = $(linux_platform_sources)
 endif
@@ -214,7 +221,6 @@ freebsd_platform_sources = \
 	zfs/ZfsCompressedArcMeter.c
 
 if HTOP_FREEBSD
-myhtopplatprogram = htop
 myhtopplatheaders = $(freebsd_platform_headers)
 myhtopplatsources = $(freebsd_platform_sources)
 endif
@@ -240,7 +246,6 @@ dragonflybsd_platform_sources = \
 	generic/uname.c
 
 if HTOP_DRAGONFLYBSD
-myhtopplatprogram = htop
 myhtopplatheaders = $(dragonflybsd_platform_headers)
 myhtopplatsources = $(dragonflybsd_platform_sources)
 endif
@@ -266,7 +271,6 @@ netbsd_platform_sources = \
 	netbsd/NetBSDProcessList.c
 
 if HTOP_NETBSD
-myhtopplatprogram = htop
 myhtopplatheaders = $(netbsd_platform_headers)
 myhtopplatsources = $(netbsd_platform_sources)
 endif
@@ -292,7 +296,6 @@ openbsd_platform_sources = \
 	openbsd/Platform.c
 
 if HTOP_OPENBSD
-myhtopplatprogram = htop
 myhtopplatheaders = $(openbsd_platform_headers)
 myhtopplatsources = $(openbsd_platform_sources)
 endif
@@ -304,6 +307,7 @@ 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 +319,7 @@ darwin_platform_headers = \
 
 darwin_platform_sources = \
 	darwin/Platform.c \
+	darwin/PlatformHelpers.c \
 	darwin/DarwinProcess.c \
 	darwin/DarwinProcessList.c \
 	generic/gettime.c \
@@ -326,7 +331,6 @@ 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 +361,6 @@ solaris_platform_sources = \
 	zfs/ZfsCompressedArcMeter.c
 
 if HTOP_SOLARIS
-myhtopplatprogram = htop
 myhtopplatheaders = $(solaris_platform_headers)
 myhtopplatsources = $(solaris_platform_sources)
 endif
@@ -393,10 +396,9 @@ 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 +418,13 @@ 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).c $(myhtopheaders) $(myhtopplatheaders) $(myhtopsources) $(myhtopplatsources)
+htop_SOURCES = $(myhtopplatprogram) $(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.
 */
 
@@ -33,10 +33,14 @@ static void MemorySwapMeter_updateValues(Meter* this) {
 static void MemorySwapMeter_draw(Meter* this, int x, int y, int w) {
    MemorySwapMeterData* data = this->meterData;
 
+   /* Use the same width for each sub meter to align with CPU meter */
+   const int colwidth = w / 2;
+   const int diff = w - colwidth * 2;
+
    assert(data->memoryMeter->draw);
-   data->memoryMeter->draw(data->memoryMeter, x, y, w / 2);
+   data->memoryMeter->draw(data->memoryMeter, x, y, colwidth);
    assert(data->swapMeter->draw);
-   data->swapMeter->draw(data->swapMeter, x + w / 2, y, w - w / 2);
+   data->swapMeter->draw(data->swapMeter, x + colwidth + diff, y, colwidth);
 }
 
 static void MemorySwapMeter_init(Meter* this) {
@@ -91,6 +95,7 @@ const MeterClass MemorySwapMeter_class = {
    },
    .updateValues = MemorySwapMeter_updateValues,
    .defaultMode = CUSTOM_METERMODE,
+   .isMultiColumn = true,
    .name = "MemorySwap",
    .uiName = "Memory & Swap",
    .description = "Combined memory and swap usage",

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.
 */
 
@@ -73,6 +73,7 @@ typedef struct MeterClass_ {
    const char* const caption;              /* prefix in the actual header */
    const char* const description;          /* optional meter description in header setup menu */
    const uint8_t maxItems;
+   const bool isMultiColumn;               /* whether the meter draws multiple sub-columns (defaults to false) */
 } MeterClass;
 
 #define As_Meter(this_)                ((const MeterClass*)((this_)->super.klass))
@@ -92,6 +93,7 @@ typedef struct MeterClass_ {
 #define Meter_attributes(this_)        As_Meter(this_)->attributes
 #define Meter_name(this_)              As_Meter(this_)->name
 #define Meter_uiName(this_)            As_Meter(this_)->uiName
+#define Meter_isMultiColumn(this_)     As_Meter(this_)->isMultiColumn
 
 typedef struct GraphData_ {
    struct timeval time;

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.
 */
 

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.
 */
 

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.
 */
 
@@ -511,6 +511,12 @@ 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;
@@ -707,6 +713,26 @@ 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) {
+   if (val >= 0) {
+      if (val < 99.9F) {
+         if (val < 0.05F) {
+            *attr = CRT_colors[PROCESS_SHADOW];
+         }
+         xSnprintf(buffer, n, "%4.1f ", val);
+      } else if (val < 999) {
+         *attr = CRT_colors[PROCESS_MEGABYTES];
+         xSnprintf(buffer, n, "%3d. ", (int)val);
+      } else {
+         *attr = CRT_colors[PROCESS_MEGABYTES];
+         xSnprintf(buffer, n, "%4d ", (int)val);
+      }
+   } else {
+      *attr = CRT_colors[PROCESS_SHADOW];
+      xSnprintf(buffer, n, " N/A ");
+   }
+}
+
 void Process_writeField(const Process* this, RichString* str, ProcessField field) {
    char buffer[256];
    size_t n = sizeof(buffer);
@@ -821,34 +847,13 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
 
       xSnprintf(buffer, n, "%4ld ", this->nlwp);
       break;
-   case PERCENT_CPU:
+   case PERCENT_CPU: Process_printPercentage(this->percent_cpu, buffer, n, &attr); break;
    case PERCENT_NORM_CPU: {
-      float cpuPercentage = this->percent_cpu;
-      if (field == PERCENT_NORM_CPU) {
-         cpuPercentage /= this->processList->activeCPUs;
-      }
-      if (cpuPercentage > 999.9F) {
-         xSnprintf(buffer, n, "%4u ", (unsigned int)cpuPercentage);
-      } else if (cpuPercentage > 99.9F) {
-         xSnprintf(buffer, n, "%3u. ", (unsigned int)cpuPercentage);
-      } else {
-         if (cpuPercentage < 0.05F)
-            attr = CRT_colors[PROCESS_SHADOW];
-
-         xSnprintf(buffer, n, "%4.1f ", cpuPercentage);
-      }
+      float cpuPercentage = this->percent_cpu / this->processList->activeCPUs;
+      Process_printPercentage(cpuPercentage, buffer, n, &attr);
       break;
    }
-   case PERCENT_MEM:
-      if (this->percent_mem > 99.9F) {
-         xSnprintf(buffer, n, "100. ");
-      } else {
-         if (this->percent_mem < 0.05F)
-            attr = CRT_colors[PROCESS_SHADOW];
-
-         xSnprintf(buffer, n, "%4.1f ", this->percent_mem);
-      }
-      break;
+   case PERCENT_MEM: Process_printPercentage(this->percent_mem, buffer, n, &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;
@@ -864,8 +869,12 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
    case STATE:
       xSnprintf(buffer, n, "%c ", this->state);
       switch (this->state) {
+#ifdef HTOP_NETBSD
+         case 'P':
+#else
          case 'R':
-            attr = CRT_colors[PROCESS_R_STATE];
+#endif
+            attr = CRT_colors[PROCESS_RUN_STATE];
             break;
          case 'D':
             attr = CRT_colors[PROCESS_D_STATE];

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.
 */
 
@@ -79,8 +79,6 @@ typedef struct ProcessMergedCommand_ {
    char* str;                                  /* merged Command string */
    size_t highlightCount;                      /* how many portions of cmdline to highlight */
    ProcessCmdlineHighlight highlights[8];      /* which portions of cmdline to highlight */
-   bool separateComm : 1;                      /* whether comm is a separate field */
-   bool unmatchedExe : 1;                      /* whether exe matched with cmdline */
    bool cmdlineChanged : 1;                    /* whether cmdline changed */
    bool exeChanged : 1;                        /* whether exe changed */
    bool commChanged : 1;                       /* whether comm changed */
@@ -358,6 +356,8 @@ 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_display(const Object* cast, RichString* out);
 
 void Process_done(Process* this);

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.
 */
 

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

@@ -1,10 +1,12 @@
-# [![htop](htop.png)](https://htop.dev)
+# [![htop logo](htop.png)](https://htop.dev)
 
 [![CI](https://github.com/htop-dev/htop/workflows/CI/badge.svg)](https://github.com/htop-dev/htop/actions)
 [![Coverity Scan Build Status](https://scan.coverity.com/projects/21665/badge.svg)](https://scan.coverity.com/projects/21665)
 [![Mailing List](https://img.shields.io/badge/Mailing%20List-htop-blue.svg)](https://groups.io/g/htop)
 [![IRC #htop](https://img.shields.io/badge/IRC-htop-blue.svg)](https://web.libera.chat/#htop)
-[![Github Release](https://img.shields.io/github/release/htop-dev/htop.svg)](https://github.com/htop-dev/htop/releases/latest)
+[![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)
 
 ![Screenshot of htop](docs/images/screenshot.png?raw=true)
 
@@ -13,26 +15,30 @@
 `htop` is a cross-platform interactive process viewer.
 
 `htop` allows scrolling the list of processes vertically and horizontally to see their full command lines and related information like memory and CPU consumption.
+Also system wide information, like load average or swap usage, is shown.
 
 The information displayed is configurable through a graphical setup and can be sorted and filtered interactively.
 
 Tasks related to processes (e.g. killing and renicing) can be done without entering their PIDs.
 
-Running `htop` requires `ncurses` libraries (typically named libncursesw*).
+Running `htop` requires `ncurses` libraries, typically named libncurses(w).
 
-For more information and details on how to contribute to `htop` visit [htop.dev](https://htop.dev).
+`htop` is written in C.
+
+For more information and details visit [htop.dev](https://htop.dev).
 
 ## Build instructions
 
 ### Prerequisite
 List of build-time dependencies:
-*  `build-essential` standard GNU autotools-based
-*  `autoconf`
-*  `autotools`
+  * standard GNU autotools-based C toolchain
+    - C99 compliant compiler
+    - `autoconf`
+    - `autotools`
   * `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.
 >
@@ -41,28 +47,27 @@ 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`
 
-Compiling `htop` requires the header files for `ncurses` . Install these and other required packages for C development from your package manager.
+Install these and other required packages for C development from your package manager.
 
 **Debian/Ubuntu**
 ~~~ shell
-sudo apt install libncursesw5-dev autotools-dev autoconf
+sudo apt install libncursesw5-dev autotools-dev autoconf build-essential
 ~~~
 
 **Fedora/RHEL**
 ~~~ shell
-sudo dnf install ncurses-devel automake autoconf
+sudo dnf install ncurses-devel automake autoconf gcc
 ~~~
 
-### Compiling from source:
-To compile from sources downloaded from the Git repository (`git clone` or downloads from [Github releases](https://github.com/htop-dev/htop/releases/)), then run:
+### 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
 ~~~
 
-By default `make install` will install into `/usr/local`, for changing the path use `./configure --prefix=/some/path`.
-
 ### Install
 To install on the local system run `make install`. By default `make install` installs into `/usr/local`. To change this path use `./configure --prefix=/some/path`.
 
@@ -74,52 +79,55 @@ To install on the local system run `make install`. By default `make install` ins
 
   * `--enable-unicode`:
     enable Unicode support
-    dependency: *libncursesw*
-    default: *yes*
-  * `--enable-pcp`:
-    enable Performance Co-Pilot support via a new pcp-htop utility
-    dependency: *libpcp*
-    default: *no*
+    - dependency: *libncursesw*
+    - default: *yes*
   * `--enable-affinity`:
     enable `sched_setaffinity(2)` and `sched_getaffinity(2)` for affinity support; conflicts with hwloc
-    default: *check*
+    - default: *check*
   * `--enable-hwloc`:
     enable hwloc support for CPU affinity; disables affinity support
-    dependency: *libhwloc*
-    default: *no*
+    - dependency: *libhwloc*
+    - default: *no*
   * `--enable-static`:
     build a static htop binary; hwloc and delay accounting are not supported
-    default: *no*
+    - default: *no*
   * `--enable-debug`:
     Enable asserts and internal sanity checks; implies a performance penalty
-    default: *no*
+    - default: *no*
+
+#### Performance Co-Pilot
+
+  * `--enable-pcp`:
+    enable Performance Co-Pilot support via a new pcp-htop utility
+    - dependency: *libpcp*
+    - default: *no*
 
 #### Linux
 
   * `--enable-sensors`:
     enable libsensors(3) support for reading temperature data
-    dependencies: *libsensors-dev*(build-time), at runtime *libsensors* is loaded via `dlopen(3)` if available
-    default: *check*
+    - dependencies: *libsensors-dev*(build-time), at runtime *libsensors* is loaded via `dlopen(3)` if available
+    - default: *check*
   * `--enable-capabilities`:
     enable Linux capabilities support
-    dependency: *libcap*
-    default: *check*
+    - dependency: *libcap*
+    - default: *check*
   * `--with-proc`:
     location of a Linux-compatible proc filesystem
-    default: */proc*
+    - default: */proc*
   * `--enable-openvz`:
     enable OpenVZ support
-    default: *no*
+    - default: *no*
   * `--enable-vserver`:
     enable VServer support
-    default: *no*
+    - default: *no*
   * `--enable-ancient-vserver`:
     enable ancient VServer support (implies `--enable-vserver`)
-    default: *no*
+    - default: *no*
   * `--enable-delayacct`:
     enable Linux delay accounting support
-    dependencies: *pkg-config*(build-time), *libnl-3* and *libnl-genl-3*
-    default: *check*
+    - dependencies: *pkg-config*(build-time), *libnl-3* and *libnl-genl-3*
+    - default: *check*
 
 
 ## Runtime dependencies:
@@ -128,40 +136,42 @@ To install on the local system run `make install`. By default `make install` ins
 
 ### Runtime optional dependencies:
 `htop` has a set of fixed optional dependencies, depending on build/configure option used:
-* `libdl`, if not building static and support for some of the optional libraries is enabled, is always required when support for to optionally load dependencies (i.e. `libsensors`, `systemd`) is present.
-* `libcap`, user-space interfaces to the POSIX 1003.1e, is always required when `--enable-capabilities` was used to configure `htop`.
+
+#### 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`.
-* `systemd` is optional when `--enable-static` was not used to configure `htop` (Linux only). If building statically and `libsystemd` is not found by `configure` support for the SystemD meter is disabled entirely.
+* `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 you also have `kvm` as a static requirement to read all the kernel information.
+#### 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 on-line help ('F1' or 'h' inside `htop`) for a list of supported key commands.
+See the manual page (`man htop`) or the help menu (**F1** or **h** inside `htop`) for a list of supported key commands.
 
 ## 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 and talk to the developers there.
+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 with the source of htop, please check whether this has already been reported in our [Github issue tracker](https://github.com/htop-dev/htop/issues).
-If not, please file a new issue describing the problem you have found, the location in the source code you are referring to and a possible fix.
+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
 
-`htop` was invented, developed and maintained by Hisham Muhammad from 2004 to 2019. His [legacy repository](https://github.com/hishamhm/htop/) has been archived to preserve the history.
+`htop` was invented, developed and maintained by [Hisham Muhammad](https://hisham.hm/) from 2004 to 2019. His [legacy repository](https://github.com/hishamhm/htop/) has been archived to preserve the history.
 
 In 2020 a [team](https://github.com/orgs/htop-dev/people) took over the development amicably and continues to maintain `htop` collaboratively.
 
 ## 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.
 */
 

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) {
-         for (uint8_t j = 0; j < this->hColumns[i].len; j++)
-            free(this->hColumns[i].names[j]);
-         free(this->hColumns[i].names);
-      }
+      String_freeArray(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) {
@@ -134,8 +165,9 @@ static void Settings_readFields(Settings* settings, const char* line) {
       }
 
       // Dynamically-defined columns are always stored by-name.
-      char* end, dynamic[32] = {0};
+      char dynamic[32] = {0};
       if (sscanf(ids[i], "Dynamic(%30s)", dynamic)) {
+         char* end;
          if ((end = strrchr(dynamic, ')')) == NULL)
             continue;
          *end = '\0';
@@ -180,8 +212,11 @@ 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.", fileName, this->config_version, PACKAGE, CONFIG_READER_MIN_VERSION);
-            fprintf(stderr, "         The configuration version will be downgraded to v%d when %s exits.\n", CONFIG_READER_MIN_VERSION, PACKAGE);
+            fprintf(stderr, "WARNING: %s specifies configuration format\n", fileName);
+            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;
          }
       } else if (String_eq(option[0], "fields")) {
@@ -301,7 +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;
@@ -325,7 +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 = " ";
    }
@@ -334,7 +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 = " ";
    }
@@ -355,9 +390,9 @@ int Settings_write(const Settings* this, bool onCrash) {
    }
 
    #define printSettingInteger(setting_, value_) \
-      fprintf(fd, setting_ "=%d%c", (int) value_, separator);
+      fprintf(fd, setting_ "=%d%c", (int) (value_), separator)
    #define printSettingString(setting_, value_) \
-      fprintf(fd, setting_ "=%s%c", value_, separator);
+      fprintf(fd, setting_ "=%s%c", value_, separator)
 
    if (!onCrash) {
       fprintf(fd, "# Beware! This file is rewritten by htop when settings are changed in the interface.\n");
@@ -539,7 +574,10 @@ Settings* Settings_new(unsigned int initialCpuCount, Hashtable* dynamicColumns)
    }
    if (!ok) {
       this->changed = true;
-      Settings_read(this, SYSCONFDIR "/htoprc", initialCpuCount);
+      ok = Settings_read(this, SYSCONFDIR "/htoprc", initialCpuCount);
+   }
+   if (!ok) {
+      Settings_defaultMeters(this, initialCpuCount);
    }
    return this;
 }
@@ -580,7 +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.
 */