blob: 0ffbd16eb77156f0cbd1eac5935d43b8a80c433f
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 | |
10 | /* BB_AUDIT SUSv3 compliant */ |
11 | /* BB_AUDIT GNU issues -- fancy version matches except args must be ints. */ |
12 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/sleep.html */ |
13 | |
14 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) |
15 | * |
16 | * Rewritten to do proper arg and error checking. |
17 | * Also, added a 'fancy' configuration to accept multiple args with |
18 | * time suffixes for seconds, minutes, hours, and days. |
19 | */ |
20 | |
21 | //usage:#define sleep_trivial_usage |
22 | //usage: IF_FEATURE_FANCY_SLEEP("[") "N" IF_FEATURE_FANCY_SLEEP("]...") |
23 | //usage:#define sleep_full_usage "\n\n" |
24 | //usage: IF_NOT_FEATURE_FANCY_SLEEP("Pause for N seconds") |
25 | //usage: IF_FEATURE_FANCY_SLEEP( |
26 | //usage: "Pause for a time equal to the total of the args given, where each arg can\n" |
27 | //usage: "have an optional suffix of (s)econds, (m)inutes, (h)ours, or (d)ays") |
28 | //usage: |
29 | //usage:#define sleep_example_usage |
30 | //usage: "$ sleep 2\n" |
31 | //usage: "[2 second delay results]\n" |
32 | //usage: IF_FEATURE_FANCY_SLEEP( |
33 | //usage: "$ sleep 1d 3h 22m 8s\n" |
34 | //usage: "[98528 second delay results]\n") |
35 | |
36 | #include "libbb.h" |
37 | |
38 | /* Do not make this applet NOFORK. It breaks ^C-ing of pauses in shells */ |
39 | |
40 | |
41 | #if ENABLE_FEATURE_FANCY_SLEEP || ENABLE_FEATURE_FLOAT_SLEEP |
42 | static const struct suffix_mult sfx[] = { |
43 | { "s", 1 }, |
44 | { "m", 60 }, |
45 | { "h", 60*60 }, |
46 | { "d", 24*60*60 }, |
47 | { "", 0 } |
48 | }; |
49 | #endif |
50 | |
51 | int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
52 | int sleep_main(int argc UNUSED_PARAM, char **argv) |
53 | { |
54 | #if ENABLE_FEATURE_FLOAT_SLEEP |
55 | double duration; |
56 | struct timespec ts; |
57 | #else |
58 | unsigned duration; |
59 | #endif |
60 | |
61 | ++argv; |
62 | if (!*argv) |
63 | bb_show_usage(); |
64 | |
65 | #if ENABLE_FEATURE_FLOAT_SLEEP |
66 | |
67 | # if ENABLE_LOCALE_SUPPORT |
68 | /* undo busybox.c setlocale */ |
69 | setlocale(LC_NUMERIC, "C"); |
70 | # endif |
71 | duration = 0; |
72 | do { |
73 | char *arg = *argv; |
74 | if (strchr(arg, '.')) { |
75 | double d; |
76 | char *pp; |
77 | int len = strspn(arg, "0123456789."); |
78 | char sv = arg[len]; |
79 | arg[len] = '\0'; |
80 | errno = 0; |
81 | d = strtod(arg, &pp); |
82 | if (errno || *pp) |
83 | bb_show_usage(); |
84 | arg += len; |
85 | *arg-- = sv; |
86 | sv = *arg; |
87 | *arg = '1'; |
88 | duration += d * xatoul_sfx(arg, sfx); |
89 | *arg = sv; |
90 | } else { |
91 | duration += xatoul_sfx(arg, sfx); |
92 | } |
93 | } while (*++argv); |
94 | |
95 | ts.tv_sec = MAXINT(typeof(ts.tv_sec)); |
96 | ts.tv_nsec = 0; |
97 | if (duration >= 0 && duration < ts.tv_sec) { |
98 | ts.tv_sec = duration; |
99 | ts.tv_nsec = (duration - ts.tv_sec) * 1000000000; |
100 | } |
101 | do { |
102 | errno = 0; |
103 | nanosleep(&ts, &ts); |
104 | } while (errno == EINTR); |
105 | |
106 | #elif ENABLE_FEATURE_FANCY_SLEEP |
107 | |
108 | duration = 0; |
109 | do { |
110 | duration += xatou_range_sfx(*argv, 0, UINT_MAX - duration, sfx); |
111 | } while (*++argv); |
112 | sleep(duration); |
113 | |
114 | #else /* simple */ |
115 | |
116 | duration = xatou(*argv); |
117 | sleep(duration); |
118 | // Off. If it's really needed, provide example why |
119 | //if (sleep(duration)) { |
120 | // bb_perror_nomsg_and_die(); |
121 | //} |
122 | |
123 | #endif |
124 | |
125 | return EXIT_SUCCESS; |
126 | } |
127 |