git.sur5r.net Git - i3/i3status/blob - src/print_cpu_temperature.c

   1 // vim:ts=8:expandtab
   2 #include <stdlib.h>
   3 #include <limits.h>
   4 #include <stdio.h>
   5 #include <string.h>
   6 #include <yajl/yajl_gen.h>
   7 #include <yajl/yajl_version.h>
   8
   9 #include "i3status.h"
  10
  11 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
  12 #include <err.h>
  13 #include <sys/types.h>
  14 #include <sys/sysctl.h>
  15 #define TZ_ZEROC 2732
  16 #define TZ_KELVTOC(x) (((x) - TZ_ZEROC) / 10), abs(((x) - TZ_ZEROC) % 10)
  17 #define TZ_AVG(x) ((x) - TZ_ZEROC) / 10
  18 #endif
  19
  20 #if defined(__OpenBSD__)
  21 #include <sys/param.h>
  22 #include <sys/types.h>
  23 #include <sys/sysctl.h>
  24 #include <sys/sensors.h>
  25 #include <errno.h>
  26 #include <err.h>
  27
  28 #define MUKTOC(v) ((v - 273150000) / 1000000.0)
  29 #endif
  30
  31 static char *thermal_zone;
  32
  33 /*
  34  * Reads the CPU temperature from /sys/class/thermal/thermal_zone0/temp and
  35  * returns the temperature in degree celcius.
  36  *
  37  */
  38 void print_cpu_temperature_info(yajl_gen json_gen, char *buffer, int zone, const char *path, const char *format, int max_threshold) {
  39         char *outwalk = buffer;
  40 #ifdef THERMAL_ZONE
  41         const char *walk;
  42         bool colorful_output = false;
  43
  44         if (path == NULL)
  45                 asprintf(&thermal_zone, THERMAL_ZONE, zone);
  46         else
  47                 asprintf(&thermal_zone, path, zone);
  48         path = thermal_zone;
  49
  50         INSTANCE(path);
  51
  52         for (walk = format; *walk != '\0'; walk++) {
  53                 if (*walk != '%') {
  54                         *(outwalk++) = *walk;
  55                         continue;
  56                 }
  57
  58                 if (BEGINS_WITH(walk+1, "degrees")) {
  59 #if defined(LINUX)
  60                         static char buf[16];
  61                         long int temp;
  62                         if (!slurp(path, buf, sizeof(buf)))
  63                                 goto error;
  64                         temp = strtol(buf, NULL, 10);
  65                         if (temp == LONG_MIN || temp == LONG_MAX || temp <= 0)
  66                                 *(outwalk++) = '?';
  67                         else {
  68                                 if ((temp/1000) >= max_threshold) {
  69                                         START_COLOR("color_bad");
  70                                         colorful_output = true;
  71                                 }
  72                                 outwalk += sprintf(outwalk, "%ld", (temp/1000));
  73                                 if (colorful_output) {
  74                                         END_COLOR;
  75                                         colorful_output = false;
  76                                 }
  77                         }
  78 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
  79                         int sysctl_rslt;
  80                         size_t sysctl_size = sizeof(sysctl_rslt);
  81                         if (sysctlbyname(path, &sysctl_rslt, &sysctl_size, NULL, 0))
  82                                 goto error;
  83
  84                         if (TZ_AVG(sysctl_rslt) >= max_threshold) {
  85                                 START_COLOR("color_bad");
  86                                 colorful_output = true;
  87                         }
  88                         outwalk += sprintf(outwalk, "%d.%d", TZ_KELVTOC(sysctl_rslt));
  89                         if (colorful_output) {
  90                                 END_COLOR;
  91                                 colorful_output = false;
  92                         }
  93
  94 #elif defined(__OpenBSD__)
  95         struct sensordev sensordev;
  96         struct sensor sensor;
  97         size_t sdlen, slen;
  98         int dev, numt, mib[5] = { CTL_HW, HW_SENSORS, 0, 0, 0 };
  99
 100         sdlen = sizeof(sensordev);
 101         slen = sizeof(sensor);
 102
 103         for (dev = 0; ; dev++) {
 104                 mib[2] = dev;
 105                 if (sysctl(mib, 3, &sensordev, &sdlen, NULL, 0) == -1) {
 106                         if (errno == ENXIO)
 107                                 continue;
 108                         if (errno == ENOENT)
 109                                 break;
 110                         goto error;
 111                 }
 112                 /* 'path' is the node within the full path (defaults to acpitz0). */
 113                 if (strncmp(sensordev.xname, path, strlen(path)) == 0) {
 114                         mib[3] = SENSOR_TEMP;
 115                         /* Limit to temo0, but should retrieve from a full path... */
 116                         for (numt = 0; numt < 1 /*sensordev.maxnumt[SENSOR_TEMP]*/; numt++) {
 117                                 mib[4] = numt;
 118                                 if (sysctl(mib, 5, &sensor, &slen, NULL, 0) == -1) {
 119                                         if (errno != ENOENT) {
 120                                                 warn("sysctl");
 121                                                 continue;
 122                                         }
 123                                 }
 124                                 if ((int)MUKTOC(sensor.value) >= max_threshold) {
 125                                         START_COLOR("color_bad");
 126                                         colorful_output = true;
 127                                 }
 128
 129                                 outwalk += sprintf(outwalk, "%.2f", MUKTOC(sensor.value));
 130
 131                                 if (colorful_output) {
 132                                         END_COLOR;
 133                                         colorful_output = false;
 134                                 }
 135                         }
 136                 }
 137         }
 138 #endif
 139                         walk += strlen("degrees");
 140                 }
 141         }
 142         OUTPUT_FULL_TEXT(buffer);
 143         return;
 144 error:
 145 #endif
 146         OUTPUT_FULL_TEXT("cant read temp");
 147         (void)fputs("i3status: Cannot read temperature. Verify that you have a thermal zone in /sys/class/thermal or disable the cpu_temperature module in your i3status config.\n", stderr);
 148 }