source: branches/3.2/mindi-busybox/coreutils/sleep.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
File size: 3.0 KB
Line 
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
42static 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
51int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
52int 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}
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