minix/lib/libsys/getuptime.c

   1 #include "sysutil.h"
   2
   3 /*
   4  * Retrieve the system's uptime (number of clock ticks since system boot),
   5  * real time (corrected number of clock ticks since system boot), and
   6  * boot time (in number of seconds since the UNIX epoch).
   7  */
   8 int
   9 getuptime(clock_t * uptime, clock_t * realtime, time_t * boottime)
  10 {
  11         struct minix_kerninfo *minix_kerninfo;
  12
  13         minix_kerninfo = get_minix_kerninfo();
  14
  15         /* We assume atomic 32-bit field retrieval.  TODO: 64-bit support. */
  16         if (uptime != NULL)
  17                 *uptime = minix_kerninfo->kclockinfo->uptime;
  18         if (realtime != NULL)
  19                 *realtime = minix_kerninfo->kclockinfo->realtime;
  20         if (boottime != NULL)
  21                 *boottime = minix_kerninfo->kclockinfo->boottime;
  22
  23         return OK;
  24 }