components/temperature.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <errno.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5 #if defined(__OpenBSD__)
   6 #include <sys/sysctl.h>
   7 #include <sys/time.h>
   8 #include <sys/sensors.h>
   9 #endif
  10
  11 #include "../util.h"
  12
  13 #if defined(__linux__)
  14 const char *
  15 temp(const char *file)
  16 {
  17         int temp;
  18
  19         return (pscanf(file, "%d", &temp) == 1) ?
  20                bprintf("%d", temp / 1000) : NULL;
  21 }
  22 #elif defined(__OpenBSD__)
  23 const char *
  24 temp(const char *null)
  25 {
  26         int mib[5];
  27         size_t size;
  28         struct sensor temp;
  29
  30         mib[0] = CTL_HW;
  31         mib[1] = HW_SENSORS;
  32         mib[2] = 0; /* cpu0 */
  33         mib[3] = SENSOR_TEMP;
  34         mib[4] = 0; /* temp0 */
  35
  36         size = sizeof(temp);
  37
  38         if (sysctl(mib, 5, &temp, &size, NULL, 0) == -1) {
  39                 fprintf(stderr, "sysctl 'SENSOR_TEMP': %s\n", strerror(errno));
  40                 return NULL;
  41         }
  42
  43         return bprintf("%d", (temp.value - 273150000) / 1000000); /* kelvin to celsius */
  44 }
  45 #endif