1 /* vi: set sw=4 ts=4: */
2 /*
3 * sleep implementation for busybox
4 *
5 * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
8 */
9 /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
10 *
11 * Rewritten to do proper arg and error checking.
12 * Also, added a 'fancy' configuration to accept multiple args with
13 * time suffixes for seconds, minutes, hours, and days.
14 */
15 //config:config SLEEP
16 //config: bool "sleep (2 kb)"
17 //config: default y
18 //config: help
19 //config: sleep is used to pause for a specified number of seconds.
20 //config: It comes in 3 versions:
21 //config: - small: takes one integer parameter
22 //config: - fancy: takes multiple integer arguments with suffixes:
23 //config: sleep 1d 2h 3m 15s
24 //config: - fancy with fractional numbers:
25 //config: sleep 2.3s 4.5h sleeps for 16202.3 seconds
26 //config: Last one is "the most compatible" with coreutils sleep,
27 //config: but it adds around 1k of code.
28 //config:
29 //config:config FEATURE_FANCY_SLEEP
30 //config: bool "Enable multiple arguments and s/m/h/d suffixes"
31 //config: default y
32 //config: depends on SLEEP
33 //config: help
34 //config: Allow sleep to pause for specified minutes, hours, and days.
35
36 /* Do not make this applet NOFORK. It breaks ^C-ing of pauses in shells */
37 //applet:IF_SLEEP(APPLET(sleep, BB_DIR_BIN, BB_SUID_DROP))
38
39 //kbuild:lib-$(CONFIG_SLEEP) += sleep.o
40
41 /* BB_AUDIT SUSv3 compliant */
42 /* BB_AUDIT GNU issues -- fancy version matches except args must be ints. */
43 /* http://www.opengroup.org/onlinepubs/007904975/utilities/sleep.html */
44
45 //usage:#define sleep_trivial_usage
46 //usage: IF_FEATURE_FANCY_SLEEP("[") "N" IF_FEATURE_FANCY_SLEEP("]...")
47 //usage:#define sleep_full_usage "\n\n"
48 //usage: IF_NOT_FEATURE_FANCY_SLEEP("Pause for N seconds")
49 //usage: IF_FEATURE_FANCY_SLEEP(
50 //usage: "Pause for a time equal to the total of the args given, where each arg can\n"
51 //usage: "have an optional suffix of (s)econds, (m)inutes, (h)ours, or (d)ays")
52 //usage:
53 //usage:#define sleep_example_usage
54 //usage: "$ sleep 2\n"
55 //usage: "[2 second delay results]\n"
56 //usage: IF_FEATURE_FANCY_SLEEP(
57 //usage: "$ sleep 1d 3h 22m 8s\n"
58 //usage: "[98528 second delay results]\n")
59
60 #include "libbb.h"
61
62 int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
sleep_main(int argc UNUSED_PARAM,char ** argv)63 int sleep_main(int argc UNUSED_PARAM, char **argv)
64 {
65 duration_t duration;
66
67 ++argv;
68 if (!*argv)
69 bb_show_usage();
70
71 /* GNU sleep accepts "inf", "INF", "infinity" and "INFINITY" */
72 if (strncasecmp(argv[0], "inf", 3) == 0)
73 for (;;)
74 sleep(INT_MAX);
75
76 #if ENABLE_FEATURE_FANCY_SLEEP
77 duration = 0;
78 do {
79 duration += parse_duration_str(*argv);
80 } while (*++argv);
81 sleep_for_duration(duration);
82 #else /* simple */
83 duration = xatou(*argv);
84 sleep(duration);
85 #endif
86 return EXIT_SUCCESS;
87 }
88