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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 (2 kb)"
//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.
/* 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-$(CONFIG_SLEEP) += sleep.o
//kbuild:lib-$(CONFIG_ASH_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"
int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int sleep_main(int argc UNUSED_PARAM, char **argv)
{
duration_t duration;
/* Note: sleep_main may be directly called from ash as a builtin.
* This brings some complications:
* + we can't use xfunc here
* + we can't use bb_show_usage
* + applet_name can be the name of the shell
*/
++argv;
if (!*argv) {
/* Without this, bare "sleep" in ash shows _ash_ --help */
/* (ash can be the "sh" applet as well, so check 2nd char) */
if (ENABLE_ASH_SLEEP && applet_name[1] != 'l') {
bb_simple_error_msg("sleep: missing operand");
return EXIT_FAILURE;
}
bb_show_usage();
}
/* GNU sleep accepts "inf", "INF", "infinity" and "INFINITY" */
if (strncasecmp(argv[0], "inf", 3) == 0)
for (;;)
sleep(INT_MAX);
//FIXME: in ash, "sleep 123qwerty" as a builtin aborts the shell
#if ENABLE_FEATURE_FANCY_SLEEP
duration = 0;
do {
duration += parse_duration_str(*argv);
} while (*++argv);
sleep_for_duration(duration);
#else /* simple */
duration = xatou(*argv);
sleep(duration);
#endif
return EXIT_SUCCESS;
}
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