busybox/coreutils/sleep.c

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/* vi: set sw=4 ts=4: */
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/*
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* sleep implementation for busybox
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*
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* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
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*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
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/* BB_AUDIT SUSv3 compliant */
/* BB_AUDIT GNU issues -- fancy version matches except args must be ints. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/sleep.html */
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Rewritten to do proper arg and error checking.
* Also, added a 'fancy' configuration to accept multiple args with
* time suffixes for seconds, minutes, hours, and days.
*/
#include <stdlib.h>
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#include <limits.h>
#include <unistd.h>
#include "busybox.h"
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#ifdef CONFIG_FEATURE_FANCY_SLEEP
static const struct suffix_mult sleep_suffixes[] = {
{ "s", 1 },
{ "m", 60 },
{ "h", 60*60 },
{ "d", 24*60*60 },
{ NULL, 0 }
};
#endif
extern int sleep_main(int argc, char **argv)
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{
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unsigned int duration;
#ifdef CONFIG_FEATURE_FANCY_SLEEP
if (argc < 2) {
bb_show_usage();
}
++argv;
duration = 0;
do {
duration += bb_xgetularg_bnd_sfx(*argv, 10,
0, UINT_MAX-duration,
sleep_suffixes);
} while (*++argv);
#else /* CONFIG_FEATURE_FANCY_SLEEP */
if (argc != 2) {
bb_show_usage();
}
#if UINT_MAX == ULONG_MAX
duration = bb_xgetularg10(argv[1]);
#else
duration = bb_xgetularg10_bnd(argv[1], 0, UINT_MAX);
#endif
#endif /* CONFIG_FEATURE_FANCY_SLEEP */
if (sleep(duration)) {
bb_perror_nomsg_and_die();
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}
return EXIT_SUCCESS;
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}