components/uptime.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <stdio.h>
   3
   4 #include "../util.h"
   5
   6 static const char *
   7 format(int uptime)
   8 {
   9         int h, m;
  10
  11         h = uptime / 3600;
  12         m = (uptime - h * 3600) / 60;
  13
  14         return bprintf("%dh %dm", h, m);
  15 }
  16
  17 #if defined(__linux__)
  18         #include <sys/sysinfo.h>
  19
  20         const char *
  21         uptime(void)
  22         {
  23                 int uptime;
  24                 struct sysinfo info;
  25
  26                 sysinfo(&info);
  27                 uptime = info.uptime;
  28
  29                 return format(uptime);
  30         }
  31 #elif defined(__OpenBSD__)
  32         #include <sys/sysctl.h>
  33         #include <sys/time.h>
  34
  35         const char *
  36         uptime(void)
  37         {
  38                 int mib[2], uptime;
  39                 size_t size;
  40                 time_t now;
  41                 struct timeval boottime;
  42
  43                 time(&now);
  44
  45                 mib[0] = CTL_KERN;
  46                 mib[1] = KERN_BOOTTIME;
  47
  48                 size = sizeof(boottime);
  49
  50                 if (sysctl(mib, 2, &boottime, &size, NULL, 0) < 0) {
  51                         warn("sysctl 'KERN_BOOTTIME':");
  52                         return NULL;
  53                 }
  54
  55                 uptime = now - boottime.tv_sec;
  56
  57                 return format(uptime);
  58         }
  59 #endif