107 lines
2.2 KiB
C
107 lines
2.2 KiB
C
/* 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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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* BB_AUDIT SUSv3 compliant */
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/* BB_AUDIT GNU issues -- fancy version matches except args must be ints. */
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/sleep.html */
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/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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*
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* Rewritten to do proper arg and error checking.
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* Also, added a 'fancy' configuration to accept multiple args with
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* time suffixes for seconds, minutes, hours, and days.
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*/
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#include "libbb.h"
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/* This is a NOFORK applet. Be very careful! */
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#if ENABLE_FEATURE_FANCY_SLEEP || ENABLE_FEATURE_FLOAT_SLEEP
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static const struct suffix_mult sfx[] = {
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{ "s", 1 },
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{ "m", 60 },
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{ "h", 60*60 },
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{ "d", 24*60*60 },
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{ }
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};
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#endif
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int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int sleep_main(int argc UNUSED_PARAM, char **argv)
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{
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#if ENABLE_FEATURE_FLOAT_SLEEP
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double duration;
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struct timespec ts;
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#else
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unsigned duration;
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#endif
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++argv;
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if (!*argv)
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bb_show_usage();
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#if ENABLE_FEATURE_FLOAT_SLEEP
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duration = 0;
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do {
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char *arg = *argv;
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if (strchr(arg, '.')) {
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double d;
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char *pp;
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int len = strspn(arg, "0123456789.");
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char sv = arg[len];
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arg[len] = '\0';
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errno = 0;
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d = strtod(arg, &pp);
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if (errno || *pp)
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bb_show_usage();
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arg[len] = sv;
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len--;
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sv = arg[len];
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arg[len] = '1';
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duration += d * xatoul_sfx(&arg[len], sfx);
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arg[len] = sv;
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} else
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duration += xatoul_sfx(arg, sfx);
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} while (*++argv);
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ts.tv_sec = MAXINT(typeof(ts.tv_sec));
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ts.tv_nsec = 0;
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if (duration >= 0 && duration < ts.tv_sec) {
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ts.tv_sec = duration;
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ts.tv_nsec = (duration - ts.tv_sec) * 1000000000;
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}
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do {
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errno = 0;
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nanosleep(&ts, &ts);
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} while (errno == EINTR);
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#elif ENABLE_FEATURE_FANCY_SLEEP
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duration = 0;
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do {
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duration += xatou_range_sfx(*argv, 0, UINT_MAX - duration, sfx);
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} while (*++argv);
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sleep(duration);
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#else /* simple */
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duration = xatou(*argv);
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sleep(duration);
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// Off. If it's really needed, provide example why
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//if (sleep(duration)) {
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// bb_perror_nomsg_and_die();
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//}
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#endif
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return EXIT_SUCCESS;
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}
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