blob: ad2d6b526eaedb3f994a2b0a7731c0a98119800c
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" |
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 | //config: |
36 | //config:config FEATURE_FLOAT_SLEEP |
37 | //config: bool "Enable fractional arguments" |
38 | //config: default y |
39 | //config: depends on FEATURE_FANCY_SLEEP |
40 | //config: help |
41 | //config: Allow for fractional numeric parameters. |
42 | |
43 | /* Do not make this applet NOFORK. It breaks ^C-ing of pauses in shells */ |
44 | //applet:IF_SLEEP(APPLET(sleep, BB_DIR_BIN, BB_SUID_DROP)) |
45 | |
46 | //kbuild:lib-$(CONFIG_SLEEP) += sleep.o |
47 | |
48 | /* BB_AUDIT SUSv3 compliant */ |
49 | /* BB_AUDIT GNU issues -- fancy version matches except args must be ints. */ |
50 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/sleep.html */ |
51 | |
52 | //usage:#define sleep_trivial_usage |
53 | //usage: IF_FEATURE_FANCY_SLEEP("[") "N" IF_FEATURE_FANCY_SLEEP("]...") |
54 | //usage:#define sleep_full_usage "\n\n" |
55 | //usage: IF_NOT_FEATURE_FANCY_SLEEP("Pause for N seconds") |
56 | //usage: IF_FEATURE_FANCY_SLEEP( |
57 | //usage: "Pause for a time equal to the total of the args given, where each arg can\n" |
58 | //usage: "have an optional suffix of (s)econds, (m)inutes, (h)ours, or (d)ays") |
59 | //usage: |
60 | //usage:#define sleep_example_usage |
61 | //usage: "$ sleep 2\n" |
62 | //usage: "[2 second delay results]\n" |
63 | //usage: IF_FEATURE_FANCY_SLEEP( |
64 | //usage: "$ sleep 1d 3h 22m 8s\n" |
65 | //usage: "[98528 second delay results]\n") |
66 | |
67 | #include "libbb.h" |
68 | |
69 | #if ENABLE_FEATURE_FANCY_SLEEP || ENABLE_FEATURE_FLOAT_SLEEP |
70 | static const struct suffix_mult sfx[] = { |
71 | { "s", 1 }, |
72 | { "m", 60 }, |
73 | { "h", 60*60 }, |
74 | { "d", 24*60*60 }, |
75 | { "", 0 } |
76 | }; |
77 | #endif |
78 | |
79 | int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
80 | int sleep_main(int argc UNUSED_PARAM, char **argv) |
81 | { |
82 | #if ENABLE_FEATURE_FLOAT_SLEEP |
83 | double duration; |
84 | struct timespec ts; |
85 | #else |
86 | unsigned duration; |
87 | #endif |
88 | |
89 | ++argv; |
90 | if (!*argv) |
91 | bb_show_usage(); |
92 | |
93 | #if ENABLE_FEATURE_FLOAT_SLEEP |
94 | |
95 | # if ENABLE_LOCALE_SUPPORT |
96 | /* undo busybox.c setlocale */ |
97 | setlocale(LC_NUMERIC, "C"); |
98 | # endif |
99 | duration = 0; |
100 | do { |
101 | char *arg = *argv; |
102 | if (strchr(arg, '.')) { |
103 | double d; |
104 | char *pp; |
105 | int len = strspn(arg, "0123456789."); |
106 | char sv = arg[len]; |
107 | arg[len] = '\0'; |
108 | errno = 0; |
109 | d = strtod(arg, &pp); |
110 | if (errno || *pp) |
111 | bb_show_usage(); |
112 | arg += len; |
113 | *arg-- = sv; |
114 | sv = *arg; |
115 | *arg = '1'; |
116 | duration += d * xatoul_sfx(arg, sfx); |
117 | *arg = sv; |
118 | } else { |
119 | duration += xatoul_sfx(arg, sfx); |
120 | } |
121 | } while (*++argv); |
122 | |
123 | ts.tv_sec = MAXINT(typeof(ts.tv_sec)); |
124 | ts.tv_nsec = 0; |
125 | if (duration >= 0 && duration < ts.tv_sec) { |
126 | ts.tv_sec = duration; |
127 | ts.tv_nsec = (duration - ts.tv_sec) * 1000000000; |
128 | } |
129 | do { |
130 | errno = 0; |
131 | nanosleep(&ts, &ts); |
132 | } while (errno == EINTR); |
133 | |
134 | #elif ENABLE_FEATURE_FANCY_SLEEP |
135 | |
136 | duration = 0; |
137 | do { |
138 | duration += xatou_range_sfx(*argv, 0, UINT_MAX - duration, sfx); |
139 | } while (*++argv); |
140 | sleep(duration); |
141 | |
142 | #else /* simple */ |
143 | |
144 | duration = xatou(*argv); |
145 | sleep(duration); |
146 | // Off. If it's really needed, provide example why |
147 | //if (sleep(duration)) { |
148 | // bb_perror_nomsg_and_die(); |
149 | //} |
150 | |
151 | #endif |
152 | |
153 | return EXIT_SUCCESS; |
154 | } |
155 |