/* 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;

}