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 tarball for details.
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#include "libbb.h"
22
23/* Do not make this applet NOFORK. It breaks ^C-ing of pauses in shells */
24
25
26#if ENABLE_FEATURE_FANCY_SLEEP || ENABLE_FEATURE_FLOAT_SLEEP
27static const struct suffix_mult sfx[] = {
28	{ "s", 1 },
29	{ "m", 60 },
30	{ "h", 60*60 },
31	{ "d", 24*60*60 },
32	{ "", 0 }
33};
34#endif
35
36int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
37int sleep_main(int argc UNUSED_PARAM, char **argv)
38{
39#if ENABLE_FEATURE_FLOAT_SLEEP
40	double duration;
41	struct timespec ts;
42#else
43	unsigned duration;
44#endif
45
46	++argv;
47	if (!*argv)
48		bb_show_usage();
49
50#if ENABLE_FEATURE_FLOAT_SLEEP
51
52# if ENABLE_LOCALE_SUPPORT
53	/* undo busybox.c setlocale */
54	setlocale(LC_NUMERIC, "C");
55# endif
56	duration = 0;
57	do {
58		char *arg = *argv;
59		if (strchr(arg, '.')) {
60			double d;
61			char *pp;
62			int len = strspn(arg, "0123456789.");
63			char sv = arg[len];
64			arg[len] = '\0';
65			errno = 0;
66			d = strtod(arg, &pp);
67			if (errno || *pp)
68				bb_show_usage();
69			arg += len;
70			*arg-- = sv;
71			sv = *arg;
72			*arg = '1';
73			duration += d * xatoul_sfx(arg, sfx);
74			*arg = sv;
75		} else {
76			duration += xatoul_sfx(arg, sfx);
77		}
78	} while (*++argv);
79
80	ts.tv_sec = MAXINT(typeof(ts.tv_sec));
81	ts.tv_nsec = 0;
82	if (duration >= 0 && duration < ts.tv_sec) {
83		ts.tv_sec = duration;
84		ts.tv_nsec = (duration - ts.tv_sec) * 1000000000;
85	}
86	do {
87		errno = 0;
88		nanosleep(&ts, &ts);
89	} while (errno == EINTR);
90
91#elif ENABLE_FEATURE_FANCY_SLEEP
92
93	duration = 0;
94	do {
95		duration += xatou_range_sfx(*argv, 0, UINT_MAX - duration, sfx);
96	} while (*++argv);
97	sleep(duration);
98
99#else /* simple */
100
101	duration = xatou(*argv);
102	sleep(duration);
103	// Off. If it's really needed, provide example why
104	//if (sleep(duration)) {
105	//	bb_perror_nomsg_and_die();
106	//}
107
108#endif
109
110	return EXIT_SUCCESS;
111}
112