slstatus

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uptime.c (650B)

      1 /* See LICENSE file for copyright and license details. */
      2 #include <stdint.h>
      3 #include <stdio.h>
      4 #include <time.h>
      5 
      6 #include "../util.h"
      7 
      8 #if defined(CLOCK_BOOTTIME)
      9 	#define UPTIME_FLAG CLOCK_BOOTTIME
     10 #elif defined(CLOCK_UPTIME)
     11 	#define UPTIME_FLAG CLOCK_UPTIME
     12 #else
     13 	#define UPTIME_FLAG CLOCK_MONOTONIC
     14 #endif
     15 
     16 const char *
     17 uptime(void)
     18 {
     19 	char warn_buf[256];
     20 	uintmax_t h, m;
     21 	struct timespec uptime;
     22 
     23 	if (clock_gettime(UPTIME_FLAG, &uptime) < 0) {
     24 		snprintf(warn_buf, 256, "clock_gettime %d", UPTIME_FLAG);
     25 		warn(warn_buf);
     26 		return NULL;
     27 	}
     28 
     29 	h = uptime.tv_sec / 3600;
     30 	m = uptime.tv_sec % 3600 / 60;
     31 
     32 	return bprintf("%juh %jum", h, m);
     33 }