busybox/coreutils/sleep.c
Denys Vlasenko 4c20d9f2b0 extend fractional duration support to "top -d N.N" and "timeout"
function                                             old     new   delta
parse_duration_str                                     -     168    +168
sleep_for_duration                                     -     157    +157
top_main                                             885     928     +43
timeout_main                                         269     312     +43
handle_input                                         571     614     +43
duration_suffixes                                      -      40     +40
sfx                                                   40       -     -40
sleep_main                                           364      79    -285
------------------------------------------------------------------------------
(add/remove: 4/1 grow/shrink: 3/1 up/down: 494/-325)          Total: 169 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-08-03 18:17:12 +02:00

87 lines
2.7 KiB
C

/* 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 (1.7 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-$(CONFIG_SLEEP) += sleep.o
/* BB_AUDIT SUSv3 compliant */
/* BB_AUDIT GNU issues -- fancy version matches except args must be ints. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/sleep.html */
//usage:#define sleep_trivial_usage
//usage: IF_FEATURE_FANCY_SLEEP("[") "N" IF_FEATURE_FANCY_SLEEP("]...")
//usage:#define sleep_full_usage "\n\n"
//usage: IF_NOT_FEATURE_FANCY_SLEEP("Pause for N seconds")
//usage: IF_FEATURE_FANCY_SLEEP(
//usage: "Pause for a time equal to the total of the args given, where each arg can\n"
//usage: "have an optional suffix of (s)econds, (m)inutes, (h)ours, or (d)ays")
//usage:
//usage:#define sleep_example_usage
//usage: "$ 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;
++argv;
if (!*argv)
bb_show_usage();
#if ENABLE_FEATURE_FANCY_SLEEP
# if ENABLE_FLOAT_DURATION
/* undo busybox.c setlocale */
setlocale(LC_NUMERIC, "C");
# endif
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;
}