/*

* uptime.c - display system uptime

* Copyright (C) 2012 Craig Small <csmall-procps@enc.com.au>

*

* This library is free software; you can redistribute it and/or

* modify it under the terms of the GNU Lesser General Public

* License as published by the Free Software Foundation; either

* version 2.1 of the License, or (at your option) any later version.

*

* This library is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

* Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public

* License along with this library; if not, write to the Free Software

* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

*/

#include <errno.h>

#include <getopt.h>

#include <stdlib.h>

#include <stdio.h>

#include <time.h>

#include <sys/time.h>

#include "c.h"

#include "fileutils.h"

#include "nls.h"

#include "proc/sysinfo.h"

#include "proc/whattime.h"

#include "proc/version.h"

static void print_uptime_since()

{

double now, uptime_secs, idle_secs;

time_t up_since_secs;

struct tm *up_since;

struct timeval tim;

/* Get the current time and convert it to a double */

gettimeofday(&tim, NULL);

now = tim.tv_sec + (tim.tv_usec / 1000000.0);

/* Get the uptime and calculate when that was */

uptime(&uptime_secs, &idle_secs);

up_since_secs = (time_t) ((now - uptime_secs) + 0.5);

/* Show this */

up_since = localtime(&up_since_secs);

printf("%04d-%02d-%02d %02d:%02d:%02d\n",

up_since->tm_year + 1900, up_since->tm_mon + 1, up_since->tm_mday,

up_since->tm_hour, up_since->tm_min, up_since->tm_sec);

}

static void __attribute__ ((__noreturn__)) usage(FILE * out)

{

fputs(USAGE_HEADER, out);

fprintf(out, _(" %s [options]\n"), program_invocation_short_name);

fputs(USAGE_OPTIONS, out);

fputs(USAGE_HELP, out);

fputs(_(" -s, --since system up since\n"), out);

fputs(USAGE_VERSION, out);

fprintf(out, USAGE_MAN_TAIL("uptime(1)"));

exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);

}

int main(int argc, char **argv)

{

int c;

static const struct option longopts[] = {

{"help", no_argument, NULL, 'h'},

{"since", no_argument, NULL, 's'},

{"version", no_argument, NULL, 'V'},

{NULL, 0, NULL, 0}

};

#ifdef HAVE_PROGRAM_INVOCATION_NAME

program_invocation_name = program_invocation_short_name;

#endif

setlocale (LC_ALL, "");

bindtextdomain(PACKAGE, LOCALEDIR);

textdomain(PACKAGE);

atexit(close_stdout);

while ((c = getopt_long(argc, argv, "hsV", longopts, NULL)) != -1)

switch (c) {

case 'h':

usage(stdout);

case 's':

print_uptime_since();

return EXIT_SUCCESS;

case 'V':

printf(PROCPS_NG_VERSION);

return EXIT_SUCCESS;

default:

usage(stderr);

}

print_uptime();

return EXIT_SUCCESS;

}