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/* vi: set sw=4 ts=4: */
/*
* sleep implementation for busybox
*
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* 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.
*/
//config:config SLEEP
//config: bool "sleep"
//config: default y
//config: help
//config: sleep is used to pause for a specified number of seconds.
//config: It comes in 3 versions:
//config: - small: takes one integer parameter
//config: - fancy: takes multiple integer arguments with suffixes:
//config: sleep 1d 2h 3m 15s
//config: - fancy with fractional numbers:
//config: sleep 2.3s 4.5h sleeps for 16202.3 seconds
//config: Last one is "the most compatible" with coreutils sleep,
//config: but it adds around 1k of code.
//config:
//config:config FEATURE_FANCY_SLEEP
//config: bool "Enable multiple arguments and s/m/h/d suffixes"
//config: default y
//config: depends on SLEEP
//config: help
//config: Allow sleep to pause for specified minutes, hours, and days.
//config:
//config:config FEATURE_FLOAT_SLEEP
//config: bool "Enable fractional arguments"
//config: default y
//config: depends on FEATURE_FANCY_SLEEP
//config: help
//config: Allow for fractional numeric parameters.
/* Do not make this applet NOFORK. It breaks ^C-ing of pauses in shells */
//applet:IF_SLEEP(APPLET(sleep, BB_DIR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_SLEEP) += sleep.o
/* BB_AUDIT SUSv3 compliant */
/* BB_AUDIT GNU issues -- fancy version matches except args must be ints. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/sleep.html */
//usage:#define sleep_trivial_usage
//usage: IF_FEATURE_FANCY_SLEEP("[") "N" IF_FEATURE_FANCY_SLEEP("]...")
//usage:#define sleep_full_usage "\n\n"
//usage: IF_NOT_FEATURE_FANCY_SLEEP("Pause for N seconds")
//usage: IF_FEATURE_FANCY_SLEEP(
//usage: "Pause for a time equal to the total of the args given, where each arg can\n"
//usage: "have an optional suffix of (s)econds, (m)inutes, (h)ours, or (d)ays")
//usage:
//usage:#define sleep_example_usage
//usage: "$ sleep 2\n"
//usage: "[2 second delay results]\n"
//usage: IF_FEATURE_FANCY_SLEEP(
//usage: "$ sleep 1d 3h 22m 8s\n"
//usage: "[98528 second delay results]\n")
#include "libbb.h"
#if ENABLE_FEATURE_FANCY_SLEEP || ENABLE_FEATURE_FLOAT_SLEEP
static const struct suffix_mult sfx[] = {
{ "s", 1 },
{ "m", 60 },
{ "h", 60*60 },
{ "d", 24*60*60 },
{ "", 0 }
};
#endif
int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int sleep_main(int argc UNUSED_PARAM, char **argv)
{
#if ENABLE_FEATURE_FLOAT_SLEEP
double duration;
struct timespec ts;
#else
unsigned duration;
#endif
++argv;
if (!*argv)
bb_show_usage();
#if ENABLE_FEATURE_FLOAT_SLEEP
# if ENABLE_LOCALE_SUPPORT
/* undo busybox.c setlocale */
setlocale(LC_NUMERIC, "C");
# endif
duration = 0;
do {
char *arg = *argv;
if (strchr(arg, '.')) {
double d;
char *pp;
int len = strspn(arg, "0123456789.");
char sv = arg[len];
arg[len] = '\0';
errno = 0;
d = strtod(arg, &pp);
if (errno || *pp)
bb_show_usage();
arg += len;
*arg-- = sv;
sv = *arg;
*arg = '1';
duration += d * xatoul_sfx(arg, sfx);
*arg = sv;
} else {
duration += xatoul_sfx(arg, sfx);
}
} while (*++argv);
ts.tv_sec = MAXINT(typeof(ts.tv_sec));
ts.tv_nsec = 0;
if (duration >= 0 && duration < ts.tv_sec) {
ts.tv_sec = duration;
ts.tv_nsec = (duration - ts.tv_sec) * 1000000000;
}
do {
errno = 0;
nanosleep(&ts, &ts);
} while (errno == EINTR);
#elif ENABLE_FEATURE_FANCY_SLEEP
duration = 0;
do {
duration += xatou_range_sfx(*argv, 0, UINT_MAX - duration, sfx);
} while (*++argv);
sleep(duration);
#else /* simple */
duration = xatou(*argv);
sleep(duration);
// Off. If it's really needed, provide example why
//if (sleep(duration)) {
// bb_perror_nomsg_and_die();
//}
#endif
return EXIT_SUCCESS;
}
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