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
   7 #include "i3status.h"
   8
   9 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  10 #include <err.h>
  11 #include <sys/types.h>
  12 #include <sys/sysctl.h>
  13 #define TZ_ZEROC 2732
  14 #define TZ_KELVTOC(x) (((x) - TZ_ZEROC) / 10), abs(((x) - TZ_ZEROC) % 10)
  15 #endif
  16
  17 static char *thermal_zone;
  18
  19 /*
  20  * Reads the CPU temperature from /sys/class/thermal/thermal_zone0/temp and
  21  * returns the temperature in degree celcius.
  22  *
  23  */
  24 void print_cpu_temperature_info(int zone, const char *format) {
  25         const char *walk;
  26         static char buf[16];
  27
  28         asprintf(&thermal_zone, THERMAL_ZONE, zone);
  29
  30         for (walk = format; *walk != '\0'; walk++) {
  31                 if (*walk != '%') {
  32                         putchar(*walk);
  33                         continue;
  34                 }
  35
  36                 if (BEGINS_WITH(walk+1, "degrees")) {
  37 #if defined(LINUX)
  38                         long int temp;
  39                         if (!slurp(thermal_zone, buf, sizeof(buf)))
  40                                 die("Could not open \"%s\"\n", thermal_zone);
  41                         temp = strtol(buf, NULL, 10);
  42                         if (temp == LONG_MIN || temp == LONG_MAX || temp <= 0)
  43                                 (void)printf("?");
  44                         else
  45                                 (void)printf("%ld", (temp/1000));
  46 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  47                         int sysctl_rslt;
  48                         size_t sysctl_size = sizeof(sysctl_rslt);
  49                         if (sysctlbyname(thermal_zone, &sysctl_rslt, &sysctl_size, NULL, 0)) {
  50                                 (void)printf("No thermal zone found");
  51                                 return;
  52                         }
  53
  54                         (void)printf("%d.%d", TZ_KELVTOC(sysctl_rslt));
  55 #endif
  56                         walk += strlen("degrees");
  57                 }
  58         }
  59 }