1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * sleep implementation for busybox
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4 | *
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5 | * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
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6 | *
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7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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8 | */
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9 |
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10 | /* BB_AUDIT SUSv3 compliant */
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11 | /* BB_AUDIT GNU issues -- fancy version matches except args must be ints. */
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12 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/sleep.html */
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13 |
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14 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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15 | *
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16 | * Rewritten to do proper arg and error checking.
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17 | * Also, added a 'fancy' configuration to accept multiple args with
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18 | * time suffixes for seconds, minutes, hours, and days.
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19 | */
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20 |
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21 | //usage:#define sleep_trivial_usage
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22 | //usage: IF_FEATURE_FANCY_SLEEP("[") "N" IF_FEATURE_FANCY_SLEEP("]...")
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23 | //usage:#define sleep_full_usage "\n\n"
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24 | //usage: IF_NOT_FEATURE_FANCY_SLEEP("Pause for N seconds")
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25 | //usage: IF_FEATURE_FANCY_SLEEP(
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26 | //usage: "Pause for a time equal to the total of the args given, where each arg can\n"
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27 | //usage: "have an optional suffix of (s)econds, (m)inutes, (h)ours, or (d)ays")
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28 | //usage:
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29 | //usage:#define sleep_example_usage
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30 | //usage: "$ sleep 2\n"
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31 | //usage: "[2 second delay results]\n"
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32 | //usage: IF_FEATURE_FANCY_SLEEP(
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33 | //usage: "$ sleep 1d 3h 22m 8s\n"
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34 | //usage: "[98528 second delay results]\n")
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35 |
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36 | #include "libbb.h"
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37 |
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38 | /* Do not make this applet NOFORK. It breaks ^C-ing of pauses in shells */
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39 |
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40 |
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41 | #if ENABLE_FEATURE_FANCY_SLEEP || ENABLE_FEATURE_FLOAT_SLEEP
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42 | static const struct suffix_mult sfx[] = {
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43 | { "s", 1 },
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44 | { "m", 60 },
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45 | { "h", 60*60 },
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46 | { "d", 24*60*60 },
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47 | { "", 0 }
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48 | };
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49 | #endif
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50 |
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51 | int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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52 | int sleep_main(int argc UNUSED_PARAM, char **argv)
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53 | {
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54 | #if ENABLE_FEATURE_FLOAT_SLEEP
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55 | double duration;
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56 | struct timespec ts;
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57 | #else
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58 | unsigned duration;
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59 | #endif
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60 |
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61 | ++argv;
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62 | if (!*argv)
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63 | bb_show_usage();
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64 |
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65 | #if ENABLE_FEATURE_FLOAT_SLEEP
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66 |
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67 | # if ENABLE_LOCALE_SUPPORT
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68 | /* undo busybox.c setlocale */
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69 | setlocale(LC_NUMERIC, "C");
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70 | # endif
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71 | duration = 0;
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72 | do {
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73 | char *arg = *argv;
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74 | if (strchr(arg, '.')) {
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75 | double d;
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76 | char *pp;
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77 | int len = strspn(arg, "0123456789.");
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78 | char sv = arg[len];
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79 | arg[len] = '\0';
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80 | errno = 0;
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81 | d = strtod(arg, &pp);
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82 | if (errno || *pp)
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83 | bb_show_usage();
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84 | arg += len;
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85 | *arg-- = sv;
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86 | sv = *arg;
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87 | *arg = '1';
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88 | duration += d * xatoul_sfx(arg, sfx);
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89 | *arg = sv;
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90 | } else {
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91 | duration += xatoul_sfx(arg, sfx);
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92 | }
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93 | } while (*++argv);
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94 |
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95 | ts.tv_sec = MAXINT(typeof(ts.tv_sec));
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96 | ts.tv_nsec = 0;
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97 | if (duration >= 0 && duration < ts.tv_sec) {
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98 | ts.tv_sec = duration;
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99 | ts.tv_nsec = (duration - ts.tv_sec) * 1000000000;
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100 | }
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101 | do {
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102 | errno = 0;
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103 | nanosleep(&ts, &ts);
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104 | } while (errno == EINTR);
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105 |
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106 | #elif ENABLE_FEATURE_FANCY_SLEEP
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107 |
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108 | duration = 0;
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109 | do {
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110 | duration += xatou_range_sfx(*argv, 0, UINT_MAX - duration, sfx);
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111 | } while (*++argv);
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112 | sleep(duration);
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113 |
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114 | #else /* simple */
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115 |
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116 | duration = xatou(*argv);
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117 | sleep(duration);
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118 | // Off. If it's really needed, provide example why
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119 | //if (sleep(duration)) {
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120 | // bb_perror_nomsg_and_die();
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121 | //}
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122 |
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123 | #endif
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124 |
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125 | return EXIT_SUCCESS;
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126 | }
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