components/uptime.c

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