components/uptime.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <errno.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5
   6 #include "../util.h"
   7
   8 #if defined(__linux__)
   9         #include <sys/sysinfo.h>
  10
  11         const char *
  12         uptime(void)
  13         {
  14                 int h;
  15                 int m;
  16                 int uptime = 0;
  17                 struct sysinfo info;
  18
  19                 sysinfo(&info);
  20                 uptime = info.uptime;
  21
  22                 h = uptime / 3600;
  23                 m = (uptime - h * 3600) / 60;
  24
  25                 return bprintf("%dh %dm", h, m);
  26         }
  27 #elif defined(__OpenBSD__)
  28         #include <sys/sysctl.h>
  29         #include <sys/time.h>
  30
  31         const char *
  32         uptime(void)
  33         {
  34                 int h;
  35                 int m;
  36                 int uptime = 0;
  37
  38                 int mib[2];
  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) != -1)
  51                         uptime = now - boottime.tv_sec;
  52                 else {
  53                         fprintf(stderr, "sysctl 'KERN_BOOTTIME': %s\n", strerror(errno));
  54                         return NULL;
  55                 }
  56
  57                 h = uptime / 3600;
  58                 m = (uptime - h * 3600) / 60;
  59
  60                 return bprintf("%dh %dm", h, m);
  61         }
  62 #endif