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	uptime.c - ubase - suckless linux base utils
	git clone git://git.suckless.org/ubase
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	---
	uptime.c (1454B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <sys/sysinfo.h>
	3
	4 #include <stdio.h>
	5 #include <stdlib.h>
	6 #include <string.h>
	7 #include <time.h>
	8 #include <utmpx.h>
	9
	10 #include "config.h"
	11 #include "util.h"
	12
	13 static void
	14 usage(void)
	15 {
	16 eprintf("usage: %s\n", argv0);
	17 }
	18
	19 int
	20 main(int argc, char *argv[])
	21 {
	22 struct utmpx utx;
	23 FILE *ufp;
	24 struct sysinfo info;
	25 time_t tmptime;
	26 struct tm *now;
	27 unsigned int days, hours, minutes;
	28 int nusers = 0;
	29 size_t n;
	30
	31 ARGBEGIN {
	32 default:
	33 usage();
	34 } ARGEND;
	35
	36 if (sysinfo(&info) < 0)
	37 eprintf("sysinfo:");
	38 time(&tmptime);
	39 now = localtime(&tmptime);
	40 printf(" %02d:%02d:%02d up ", now->tm_hour, now->tm_min, now->tm…
	41 info.uptime /= 60;
	42 minutes = info.uptime % 60;
	43 info.uptime /= 60;
	44 hours = info.uptime % 24;
	45 days = info.uptime / 24;
	46 if (days)
	47 printf("%d day%s, ", days, days != 1 ? "s" : "");
	48 if (hours)
	49 printf("%2d:%02d, ", hours, minutes);
	50 else
	51 printf("%d min, ", minutes);
	52
	53 if ((ufp = fopen(UTMP_PATH, "r"))) {
	54 while ((n = fread(&utx, sizeof(utx), 1, ufp)) > 0) {
	55 if (!utx.ut_user[0])
	56 continue;
	57 if (utx.ut_type != USER_PROCESS)
	58 continue;
	59 nusers++;
	60 }
	61 if (ferror(ufp))
	62 eprintf("%s: read error:", UTMP_PATH);
	63 fclose(ufp);
	64 printf(" %d user%s, ", nusers, nusers != 1 ? "s" : "");
	65 }
	66
	67 printf(" load average: %.02f, %.02f, %.02f\n",
	68 info.loads[0] / 65536.0f,
	69 info.loads[1] / 65536.0f,
	70 info.loads[2] / 65536.0f);
	71
	72 return 0;
	73 }