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 #if defined(__linux__)
   6 #include <sys/sysinfo.h>
   7 #elif defined(__OpenBSD__)
   8 #include <sys/sysctl.h>
   9 #include <sys/time.h>
  10 #endif
  11
  12 #include "../util.h"
  13
  14 #if defined(__linux__)
  15 const char *
  16 uptime(void)
  17 {
  18         int h;
  19         int m;
  20         int uptime = 0;
  21         struct sysinfo info;
  22
  23         sysinfo(&info);
  24         uptime = info.uptime;
  25
  26         h = uptime / 3600;
  27         m = (uptime - h * 3600) / 60;
  28
  29         return bprintf("%dh %dm", h, m);
  30 }
  31 #elif defined(__OpenBSD__)
  32 const char *
  33 uptime(void)
  34 {
  35         int h;
  36         int m;
  37         int uptime = 0;
  38
  39         int mib[2];
  40         size_t size;
  41         time_t now;
  42         struct timeval boottime;
  43
  44         time(&now);
  45
  46         mib[0] = CTL_KERN;
  47         mib[1] = KERN_BOOTTIME;
  48
  49         size = sizeof(boottime);
  50
  51         if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1)
  52                 uptime = now - boottime.tv_sec;
  53         else {
  54                 fprintf(stderr, "sysctl 'KERN_BOOTTIME': %s\n", strerror(errno));
  55                 return NULL;
  56         }
  57
  58         h = uptime / 3600;
  59         m = (uptime - h * 3600) / 60;
  60
  61         return bprintf("%dh %dm", h, m);
  62 }
  63 #endif