114 lines
3.4 KiB
C
114 lines
3.4 KiB
C
/*
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* uptime.c - display system uptime
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* Copyright (C) 2012-2015 Craig Small <csmall@enc.com.au>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <errno.h>
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#include <getopt.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <time.h>
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#include <sys/time.h>
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#include "c.h"
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#include "fileutils.h"
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#include "nls.h"
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#include <proc/procps.h>
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static void print_uptime_since()
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{
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double now, uptime_secs, idle_secs;
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time_t up_since_secs;
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struct tm *up_since;
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struct timeval tim;
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/* Get the current time and convert it to a double */
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if (gettimeofday(&tim, NULL) != 0)
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xerr(EXIT_FAILURE, "gettimeofday");
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now = tim.tv_sec + (tim.tv_usec / 1000000.0);
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/* Get the uptime and calculate when that was */
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if (procps_uptime(&uptime_secs, &idle_secs) < 0)
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xerrx(EXIT_FAILURE, "uptime");
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up_since_secs = (time_t) ((now - uptime_secs) + 0.5);
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/* Show this */
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if ((up_since = localtime(&up_since_secs)) == NULL)
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xerrx(EXIT_FAILURE, "localtime");
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printf("%04d-%02d-%02d %02d:%02d:%02d\n",
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up_since->tm_year + 1900, up_since->tm_mon + 1, up_since->tm_mday,
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up_since->tm_hour, up_since->tm_min, up_since->tm_sec);
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}
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static void __attribute__ ((__noreturn__)) usage(FILE * out)
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{
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fputs(USAGE_HEADER, out);
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fprintf(out, _(" %s [options]\n"), program_invocation_short_name);
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fputs(USAGE_OPTIONS, out);
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fputs(_(" -p, --pretty show uptime in pretty format\n"), out);
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fputs(USAGE_HELP, out);
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fputs(_(" -s, --since system up since\n"), out);
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fputs(USAGE_VERSION, out);
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fprintf(out, USAGE_MAN_TAIL("uptime(1)"));
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exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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int main(int argc, char **argv)
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{
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int c, p = 0;
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static const struct option longopts[] = {
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{"pretty", no_argument, NULL, 'p'},
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{"help", no_argument, NULL, 'h'},
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{"since", no_argument, NULL, 's'},
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{"version", no_argument, NULL, 'V'},
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{NULL, 0, NULL, 0}
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};
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#ifdef HAVE_PROGRAM_INVOCATION_NAME
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program_invocation_name = program_invocation_short_name;
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#endif
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setlocale (LC_ALL, "");
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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atexit(close_stdout);
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while ((c = getopt_long(argc, argv, "phsV", longopts, NULL)) != -1)
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switch (c) {
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case 'p':
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p = 1;
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break;
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case 'h':
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usage(stdout);
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case 's':
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print_uptime_since();
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return EXIT_SUCCESS;
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case 'V':
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printf(PROCPS_NG_VERSION);
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return EXIT_SUCCESS;
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default:
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usage(stderr);
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}
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if (p)
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printf("%s\n", procps_uptime_sprint_short());
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else
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printf("%s\n", procps_uptime_sprint());
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return EXIT_SUCCESS;
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}
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