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__)
  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 #endif
  18
  19 #if defined(__OpenBSD__)
  20 #include <sys/param.h>
  21 #include <sys/types.h>
  22 #include <sys/sysctl.h>
  23 #include <sys/sensors.h>
  24 #include <errno.h>
  25 #include <err.h>
  26
  27 #define MUKTOC(v) ((v - 273150000) / 1000000.0)
  28 #endif
  29
  30 static char *thermal_zone;
  31
  32 /*
  33  * Reads the CPU temperature from /sys/class/thermal/thermal_zone0/temp and
  34  * returns the temperature in degree celcius.
  35  *
  36  */
  37 void print_cpu_temperature_info(yajl_gen json_gen, char *buffer, int zone, const char *path, const char *format, int max_threshold) {
  38 #ifdef THERMAL_ZONE
  39         const char *walk;
  40         char *outwalk = buffer;
  41         bool colorful_output;
  42
  43         if (path == NULL)
  44                 asprintf(&thermal_zone, THERMAL_ZONE, zone);
  45         else
  46                 asprintf(&thermal_zone, path, zone);
  47         path = thermal_zone;
  48
  49         INSTANCE(path);
  50
  51         for (walk = format; *walk != '\0'; walk++) {
  52                 if (*walk != '%') {
  53                         *(outwalk++) = *walk;
  54                         continue;
  55                 }
  56
  57                 if (BEGINS_WITH(walk+1, "degrees")) {
  58 #if defined(LINUX)
  59                         static char buf[16];
  60                         long int temp;
  61                         if (!slurp(path, buf, sizeof(buf)))
  62                                 goto error;
  63                         temp = strtol(buf, NULL, 10);
  64                         if (temp == LONG_MIN || temp == LONG_MAX || temp <= 0)
  65                                 *(outwalk++) = '?';
  66                         else
  67                                 outwalk += sprintf(outwalk, "%ld", (temp/1000));
  68 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  69                         int sysctl_rslt;
  70                         size_t sysctl_size = sizeof(sysctl_rslt);
  71                         if (sysctlbyname(path, &sysctl_rslt, &sysctl_size, NULL, 0))
  72                                 goto error;
  73
  74                         outwalk += sprintf(outwalk, "%d.%d", TZ_KELVTOC(sysctl_rslt));
  75 #elif defined(__OpenBSD__)
  76         struct sensordev sensordev;
  77         struct sensor sensor;
  78         size_t sdlen, slen;
  79         int dev, numt, mib[5] = { CTL_HW, HW_SENSORS, 0, 0, 0 };
  80
  81         sdlen = sizeof(sensordev);
  82         slen = sizeof(sensor);
  83
  84         for (dev = 0; ; dev++) {
  85                 mib[2] = dev;
  86                 if (sysctl(mib, 3, &sensordev, &sdlen, NULL, 0) == -1) {
  87                         if (errno == ENXIO)
  88                                 continue;
  89                         if (errno == ENOENT)
  90                                 break;
  91                         goto error;
  92                 }
  93                 /* 'path' is the node within the full path (defaults to acpitz0). */
  94                 if (strncmp(sensordev.xname, path, strlen(path)) == 0) {
  95                         mib[3] = SENSOR_TEMP;
  96                         /* Limit to temo0, but should retrieve from a full path... */
  97                         for (numt = 0; numt < 1 /*sensordev.maxnumt[SENSOR_TEMP]*/; numt++) {
  98                                 mib[4] = numt;
  99                                 if (sysctl(mib, 5, &sensor, &slen, NULL, 0) == -1) {
 100                                         if (errno != ENOENT) {
 101                                                 warn("sysctl");
 102                                                 continue;
 103                                         }
 104                                 }
 105                                 if ((int)MUKTOC(sensor.value) >= max_threshold) {
 106                                         START_COLOR("color_bad");
 107                                         colorful_output = true;
 108                                 }
 109
 110                                 outwalk += sprintf(outwalk, "%.2f", MUKTOC(sensor.value));
 111
 112                                 if (colorful_output)
 113                                         END_COLOR;
 114                         }
 115                 }
 116         }
 117 #endif
 118                         walk += strlen("degrees");
 119                 }
 120         }
 121         OUTPUT_FULL_TEXT(buffer);
 122         return;
 123 error:
 124 #endif
 125         OUTPUT_FULL_TEXT("cant read temp");
 126         (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);
 127 }