52269d22f3
If stream status is not checked at the end of execution below problem would not report error, or non-zero exit code. The uptime is just an example same was true with all commands of the project. $ uptime >&- ; echo $? uptime: write error: Bad file descriptor 1 $ uptime >/dev/full ; echo $? uptime: write error: No space left on device 1 Signed-off-by: Sami Kerola <kerolasa@iki.fi>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/*
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* uptime.c - display system uptime
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* Copyright (C) 2012 Craig Small <csmall-procps@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 "c.h"
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#include "fileutils.h"
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#include "nls.h"
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#include "proc/whattime.h"
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#include "proc/version.h"
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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(USAGE_HELP, 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;
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static const struct option longopts[] = {
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{"help", no_argument, NULL, 'h'},
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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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program_invocation_name = program_invocation_short_name;
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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, "hV", longopts, NULL)) != -1)
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switch (c) {
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case 'h':
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usage(stdout);
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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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print_uptime();
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return EXIT_SUCCESS;
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}
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