ubase/uptime.c

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/* See LICENSE file for copyright and license details. */
#include <sys/sysinfo.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <utmpx.h>
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#include "util.h"
static void
usage(void)
{
eprintf("usage: %s\n", argv0);
}
int
main(int argc, char *argv[])
{
struct utmpx utx;
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FILE *ufp;
struct sysinfo info;
time_t tmptime;
struct tm *now;
unsigned int days, hours, minutes;
int nusers = 0;
size_t n;
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ARGBEGIN {
default:
usage();
} ARGEND;
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if (sysinfo(&info) < 0)
eprintf("sysinfo:");
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time(&tmptime);
now = localtime(&tmptime);
printf(" %02d:%02d:%02d up ", now->tm_hour, now->tm_min, now->tm_sec);
info.uptime /= 60;
minutes = info.uptime % 60;
info.uptime /= 60;
hours = info.uptime % 24;
days = info.uptime / 24;
if (days)
printf("%d day%s, ", days, days > 1 ? "s" : "");
if (hours)
printf("%2d:%02d, ", hours, minutes);
else
printf("%d min, ", minutes);
if ((ufp = fopen("/var/run/utmp", "r"))) {
while ((n = fread(&utx, sizeof(utx), 1, ufp)) > 0) {
if (!utx.ut_user[0])
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continue;
if (utx.ut_type != USER_PROCESS)
continue;
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nusers++;
}
if (ferror(ufp))
eprintf("/var/run/utmp: read error:");
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fclose(ufp);
printf(" %d user%s, ", nusers, nusers > 1 ? "s" : "");
}
printf(" load average: %.02f, %.02f, %.02f\n",
info.loads[0] / 65536.0f,
info.loads[1] / 65536.0f,
info.loads[2] / 65536.0f);
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return EXIT_SUCCESS;
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}