Show CPU temperature in CPU meter

Show the CPU temperature in the CPU meter, like CPU frequency, instead
of spending a whole line on a single (temperature) number.

CPUMeter.c

@@ -38,25 +38,42 @@ static void CPUMeter_updateValues(Meter* this, char* buffer, int size) {
       return;
    }
    memset(this->values, 0, sizeof(double) * CPU_METER_ITEMCOUNT);
+
+   char cpuUsageBuffer[8] = { 0 };
+   char cpuFrequencyBuffer[16] = { 0 };
+   char cpuTemperatureBuffer[30] = { 0 };
+
    double percent = Platform_setCPUValues(this, cpu);
+
+   if (this->pl->settings->showCPUUsage) {
+      xSnprintf(cpuUsageBuffer, sizeof(cpuUsageBuffer), "%5.1f%%", percent);
+   }
+
    if (this->pl->settings->showCPUFrequency) {
       double cpuFrequency = this->values[CPU_METER_FREQUENCY];
-      char cpuFrequencyBuffer[16];
       if (isnan(cpuFrequency)) {
          xSnprintf(cpuFrequencyBuffer, sizeof(cpuFrequencyBuffer), "N/A");
       } else {
          xSnprintf(cpuFrequencyBuffer, sizeof(cpuFrequencyBuffer), "%4uMHz", (unsigned)cpuFrequency);
       }
-      if (this->pl->settings->showCPUUsage) {
-         xSnprintf(buffer, size, "%5.1f%% %s", percent, cpuFrequencyBuffer);
-      } else {
-         xSnprintf(buffer, size, "%s", cpuFrequencyBuffer);
-      }
-   } else if (this->pl->settings->showCPUUsage) {
-      xSnprintf(buffer, size, "%5.1f%%", percent);
-   } else if (size > 0) {
-      buffer[0] = '\0';
    }
+
+   if (this->pl->settings->showCPUTemperature) {
+      double cpuTemperature = this->values[CPU_METER_TEMPERATURE];
+      if (isnan(cpuTemperature))
+         xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "N/A");
+      else if (this->pl->settings->degreeFahrenheit)
+         xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "%3d%sF", (int)(cpuTemperature * 9 / 5 + 32), CRT_degreeSign());
+      else
+         xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "%d%sC", (int)cpuTemperature, CRT_degreeSign());
+   }
+
+   xSnprintf(buffer, size, "%s%s%s%s%s",
+             cpuUsageBuffer,
+             (cpuUsageBuffer[0] && (cpuFrequencyBuffer[0] || cpuTemperatureBuffer[0])) ? " " : "",
+             cpuFrequencyBuffer,
+             (cpuFrequencyBuffer[0] && cpuTemperatureBuffer[0]) ? " " : "",
+             cpuTemperatureBuffer);
 }
 
 static void CPUMeter_display(Object* cast, RichString* out) {
@@ -109,6 +126,19 @@ static void CPUMeter_display(Object* cast, RichString* out) {
          RichString_append(out, CRT_colors[CPU_GUEST], buffer);
       }
    }
+
+   if (this->pl->settings->showCPUTemperature) {
+      char cpuTemperatureBuffer[10];
+      double cpuTemperature = this->values[CPU_METER_TEMPERATURE];
+      if (isnan(cpuTemperature))
+         xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "N/A");
+      else if (this->pl->settings->degreeFahrenheit)
+         xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "%5.1f%sF", cpuTemperature * 9 / 5 + 32, CRT_degreeSign());
+      else
+         xSnprintf(cpuTemperatureBuffer, sizeof(cpuTemperatureBuffer), "%5.1f%sC", cpuTemperature, CRT_degreeSign());
+      RichString_append(out, CRT_colors[METER_TEXT], "temp:");
+      RichString_append(out, CRT_colors[METER_VALUE], cpuTemperatureBuffer);
+   }
 }
 
 static void AllCPUsMeter_getRange(Meter* this, int* start, int* count) {

CPUMeter.h

@@ -19,7 +19,8 @@ typedef enum {
    CPU_METER_GUEST = 6,
    CPU_METER_IOWAIT = 7,
    CPU_METER_FREQUENCY = 8,
-   CPU_METER_ITEMCOUNT = 9, // number of entries in this enum
+   CPU_METER_TEMPERATURE = 9,
+   CPU_METER_ITEMCOUNT = 10, // number of entries in this enum
 } CPUMeterValues;
 
 extern int CPUMeter_attributes[];

CRT.c

@@ -67,6 +67,14 @@ bool CRT_utf8 = false;
 
 #endif
 
+const char* CRT_degreeSign() {
+   #ifdef HAVE_LIBNCURSESW
+   if (CRT_utf8)
+      return "\xc2\xb0";
+   #endif
+   return "";
+}
+
 const char **CRT_treeStr = CRT_treeStrAscii;
 
 static bool CRT_hasColors;

CRT.h

@@ -119,6 +119,8 @@ void CRT_handleSIGSEGV(int sgn);
 
 extern const char *CRT_treeStrAscii[TREE_STR_COUNT];
 
+const char* CRT_degreeSign(void);
+
 #ifdef HAVE_LIBNCURSESW
 
 extern const char *CRT_treeStrUtf8[TREE_STR_COUNT];

DisplayOptionsPanel.c

@@ -86,7 +86,9 @@ DisplayOptionsPanel* DisplayOptionsPanel_new(Settings* settings, ScreenManager*
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Add guest time in CPU meter percentage"), &(settings->accountGuestInCPUMeter)));
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Also show CPU percentage numerically"), &(settings->showCPUUsage)));
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Also show CPU frequency"), &(settings->showCPUFrequency)));
+   Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Also show CPU temperature"), &(settings->showCPUTemperature)));
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Enable the mouse"), &(settings->enableMouse)));
+   Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Show temperature in degree Fahrenheit"), &(settings->degreeFahrenheit)));
    #ifdef HAVE_LIBHWLOC
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Show topology when selecting affinity by default"), &(settings->topologyAffinity)));
    #endif

Settings.c

@@ -172,6 +172,8 @@ static bool Settings_read(Settings* this, const char* fileName) {
          this->showCPUUsage = atoi(option[1]);
       } else if (String_eq(option[0], "show_cpu_frequency")) {
          this->showCPUFrequency = atoi(option[1]);
+      } else if (String_eq(option[0], "show_cpu_temperature")) {
+         this->showCPUTemperature = atoi(option[1]);
       } else if (String_eq(option[0], "update_process_names")) {
          this->updateProcessNames = atoi(option[1]);
       } else if (String_eq(option[0], "account_guest_in_cpu_meter")) {
@@ -195,6 +197,8 @@ static bool Settings_read(Settings* this, const char* fileName) {
       } else if (String_eq(option[0], "right_meter_modes")) {
          Settings_readMeterModes(this, option[1], 1);
          didReadMeters = true;
+      } else if (String_eq(option[0], "degree_fahrenheit")) {
+         this->degreeFahrenheit = atoi(option[1]);
       #ifdef HAVE_LIBHWLOC
       } else if (String_eq(option[0], "topology_affinity")) {
          this->topologyAffinity = !!atoi(option[1]);
@@ -269,6 +273,7 @@ bool Settings_write(Settings* this) {
    fprintf(fd, "cpu_count_from_zero=%d\n", (int) this->countCPUsFromZero);
    fprintf(fd, "show_cpu_usage=%d\n", (int) this->showCPUUsage);
    fprintf(fd, "show_cpu_frequency=%d\n", (int) this->showCPUFrequency);
+   fprintf(fd, "show_cpu_temperature=%d\n", (int) this->showCPUTemperature);
    fprintf(fd, "update_process_names=%d\n", (int) this->updateProcessNames);
    fprintf(fd, "account_guest_in_cpu_meter=%d\n", (int) this->accountGuestInCPUMeter);
    fprintf(fd, "color_scheme=%d\n", (int) this->colorScheme);
@@ -278,6 +283,7 @@ bool Settings_write(Settings* this) {
    fprintf(fd, "left_meter_modes="); writeMeterModes(this, fd, 0);
    fprintf(fd, "right_meters="); writeMeters(this, fd, 1);
    fprintf(fd, "right_meter_modes="); writeMeterModes(this, fd, 1);
+   fprintf(fd, "degree_fahrenheit=%d\n", (int) this->degreeFahrenheit);
    #ifdef HAVE_LIBHWLOC
    fprintf(fd, "topology_affinity=%d\n", (int) this->topologyAffinity);
    #endif
@@ -302,10 +308,12 @@ Settings* Settings_new(int cpuCount) {
    this->countCPUsFromZero = false;
    this->showCPUUsage = true;
    this->showCPUFrequency = false;
+   this->showCPUTemperature = false;
    this->updateProcessNames = false;
    this->cpuCount = cpuCount;
    this->showProgramPath = true;
    this->highlightThreads = true;
+   this->degreeFahrenheit = false;
    #ifdef HAVE_LIBHWLOC
    this->topologyAffinity = false;
    #endif

Settings.h

@@ -35,6 +35,7 @@ typedef struct Settings_ {
    bool detailedCPUTime;
    bool showCPUUsage;
    bool showCPUFrequency;
+   bool showCPUTemperature;
    bool treeView;
    bool showProgramPath;
    bool hideThreads;
@@ -49,6 +50,7 @@ typedef struct Settings_ {
    bool accountGuestInCPUMeter;
    bool headerMargin;
    bool enableMouse;
+   bool degreeFahrenheit;
    #ifdef HAVE_LIBHWLOC
    bool topologyAffinity;
    #endif

configure.ac

@@ -276,6 +276,16 @@ then
    ])
 fi
 
+AC_ARG_ENABLE(sensors, [AS_HELP_STRING([--enable-sensors], [enable libsensors support for reading temperature data.])],, enable_sensors="check")
+if test "x$enable_sensors" = xyes; then
+   AC_CHECK_LIB([sensors], [sensors_get_value], [], [missing_libraries="$missing_libraries libsensors"])
+   AC_CHECK_HEADERS([sensors/sensors.h], [], [missing_headers="$missing_headers $ac_header"])
+elif test "x$enable_sensors" = xcheck; then
+   enable_sensors=yes
+   AC_CHECK_LIB([sensors], [sensors_get_value], [], [enable_sensors=no])
+   AC_CHECK_HEADERS([sensors/sensors.h], [], [enable_sensors=no])
+fi
+
 AM_CFLAGS="\
  -Wall\
  -Wcast-align\
@@ -348,4 +358,5 @@ AC_MSG_RESULT([
   hwlock:                  $enable_hwloc
   setuid:                  $enable_setuid
   linux delay accounting:  $enable_delayacct
+  sensors:                 $enable_sensors
 ])

darwin/Platform.c

@@ -218,6 +218,7 @@ double Platform_setCPUValues(Meter* mtr, int cpu) {
    total = mtr->values[CPU_METER_NICE] + mtr->values[CPU_METER_NORMAL] + mtr->values[CPU_METER_KERNEL];
 
    mtr->values[CPU_METER_FREQUENCY] = NAN;
+   mtr->values[CPU_METER_TEMPERATURE] = NAN;
 
    return CLAMP(total, 0.0, 100.0);
 }

dragonflybsd/Platform.c

@@ -175,6 +175,7 @@ double Platform_setCPUValues(Meter* this, int cpu) {
    if (isnan(percent)) percent = 0.0;
 
    v[CPU_METER_FREQUENCY] = NAN;
+   v[CPU_METER_TEMPERATURE] = NAN;
 
    return percent;
 }

freebsd/Platform.c

@@ -178,6 +178,7 @@ double Platform_setCPUValues(Meter* this, int cpu) {
    if (isnan(percent)) percent = 0.0;
 
    v[CPU_METER_FREQUENCY] = NAN;
+   v[CPU_METER_TEMPERATURE] = NAN;
 
    return percent;
 }

htop.c

@@ -27,6 +27,10 @@ in the source distribution for its full text.
 #include <time.h>
 #include <unistd.h>
 
+#ifdef HAVE_LIBSENSORS
+#include <sensors/sensors.h>
+#endif
+
 //#link m
 
 static void printVersionFlag(void) {
@@ -235,6 +239,10 @@ int main(int argc, char** argv) {
 
    CRT_init(settings->delay, settings->colorScheme, flags.allowUnicode);
 
+#ifdef HAVE_LIBSENSORS
+   sensors_init(NULL);
+#endif
+
    MainPanel* panel = MainPanel_new();
    ProcessList_setPanel(pl, (Panel*) panel);
 
@@ -270,6 +278,10 @@ int main(int argc, char** argv) {
    attroff(CRT_colors[RESET_COLOR]);
    refresh();
 
+#ifdef HAVE_LIBSENSORS
+   sensors_cleanup();
+#endif
+
    CRT_done();
    if (settings->changed)
       Settings_write(settings);

linux/LinuxProcessList.c

@@ -42,6 +42,11 @@ in the source distribution for its full text.
 #include <linux/taskstats.h>
 #endif
 
+#ifdef HAVE_LIBSENSORS
+#include <sensors/sensors.h>
+#endif
+
+
 static ssize_t xread(int fd, void *buf, size_t count) {
   // Read some bytes. Retry on EINTR and when we don't get as many bytes as we requested.
   size_t alreadyRead = 0;
@@ -1234,6 +1239,71 @@ static void LinuxProcessList_scanCPUFrequency(LinuxProcessList* this) {
    scanCPUFreqencyFromCPUinfo(this);
 }
 
+#ifdef HAVE_LIBSENSORS
+static int getCPUTemperatures(CPUData* cpus, int cpuCount) {
+   int tempCount = 0;
+
+   int n = 0;
+   for (const sensors_chip_name *chip = sensors_get_detected_chips(NULL, &n); chip; chip = sensors_get_detected_chips(NULL, &n)) {
+      char buffer[32];
+      sensors_snprintf_chip_name(buffer, sizeof(buffer), chip);
+      if (!String_startsWith(buffer, "coretemp") && !String_startsWith(buffer, "cpu_thermal"))
+         continue;
+
+      int m = 0;
+      for (const sensors_feature *feature = sensors_get_features(chip, &m); feature; feature = sensors_get_features(chip, &m)) {
+         if (feature->type != SENSORS_FEATURE_TEMP)
+            continue;
+
+         if (feature->number > cpuCount)
+            continue;
+
+         const sensors_subfeature *sub_feature = sensors_get_subfeature(chip, feature, SENSORS_SUBFEATURE_TEMP_INPUT);
+         if (sub_feature) {
+            double temp;
+            int r = sensors_get_value(chip, sub_feature->number, &temp);
+            if (r != 0)
+               continue;
+
+            cpus[feature->number].temperature = temp;
+            tempCount++;
+         }
+      }
+   }
+
+   return tempCount;
+}
+
+static void LinuxProcessList_scanCPUTemperature(LinuxProcessList* this) {
+   const int cpuCount = this->super.cpuCount;
+
+   for (int i = 0; i <= cpuCount; i++)
+      this->cpus[i].temperature = NAN;
+
+   int r = getCPUTemperatures(this->cpus, cpuCount);
+
+   /* No temperature - nothing to do */
+   if (r == 0)
+      return;
+
+   /* Only package temperature - copy to all cpus */
+   if (r == 1 && !isnan(this->cpus[0].temperature)) {
+      for (int i = 0; i <= cpuCount; i++)
+         this->cpus[i].temperature = this->cpus[0].temperature;
+
+      return;
+   }
+
+   /* Half the temperatures, probably HT/SMT - copy to second half */
+   if (r >= 1 && r == cpuCount / 2) {
+      for (int i = cpuCount / 2 + 1; i <= cpuCount; i++)
+         this->cpus[i].temperature = this->cpus[i/2].temperature;
+
+      return;
+   }
+}
+#endif
+
 void ProcessList_goThroughEntries(ProcessList* super) {
    LinuxProcessList* this = (LinuxProcessList*) super;
    const Settings* settings = super->settings;
@@ -1245,6 +1315,12 @@ void ProcessList_goThroughEntries(ProcessList* super) {
    if (settings->showCPUFrequency)
       LinuxProcessList_scanCPUFrequency(this);
 
+   #ifdef HAVE_LIBSENSORS
+   if (settings->showCPUTemperature)
+      LinuxProcessList_scanCPUTemperature(this);
+   #endif
+
+
    struct timeval tv;
    gettimeofday(&tv, NULL);
    LinuxProcessList_recurseProcTree(this, PROCDIR, NULL, period, tv);

linux/LinuxProcessList.h

@@ -40,6 +40,10 @@ typedef struct CPUData_ {
    unsigned long long int guestPeriod;
 
    double frequency;
+
+   #ifdef HAVE_LIBSENSORS
+   double temperature;
+   #endif
 } CPUData;
 
 typedef struct TtyDriver_ {

linux/Platform.c

@@ -25,12 +25,14 @@ in the source distribution for its full text.
 #include "zfs/ZfsArcMeter.h"
 #include "zfs/ZfsCompressedArcMeter.h"
 #include "LinuxProcess.h"
+#include "StringUtils.h"
 
 #include <math.h>
 #include <assert.h>
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 
 ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, (int)M_SHARE, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
@@ -200,6 +202,15 @@ double Platform_setCPUValues(Meter* this, int cpu) {
 
    v[CPU_METER_FREQUENCY] = cpuData->frequency;
 
+#ifdef HAVE_LIBSENSORS
+   if (this->pl->settings->showCPUTemperature)
+      v[CPU_METER_TEMPERATURE] = cpuData->temperature;
+   else
+      v[CPU_METER_TEMPERATURE] = NAN;
+#else
+   v[CPU_METER_TEMPERATURE] = NAN;
+#endif
+
    return percent;
 }