busybox/coreutils/sleep.c

/* vi: set sw=4 ts=4: */
/*
 * sleep implementation for busybox
 *
 * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

/* BB_AUDIT SUSv3 compliant */
/* BB_AUDIT GNU issues -- fancy version matches except args must be ints. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/sleep.html */

/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
 *
 * Rewritten to do proper arg and error checking.
 * Also, added a 'fancy' configuration to accept multiple args with
 * time suffixes for seconds, minutes, hours, and days.
 */

#include "libbb.h"

/* This is a NOFORK applet. Be very careful! */


#if ENABLE_FEATURE_FANCY_SLEEP || ENABLE_FEATURE_FLOAT_SLEEP
static const struct suffix_mult sfx[] = {
	{ "s", 1 },
	{ "m", 60 },
	{ "h", 60*60 },
	{ "d", 24*60*60 },
	{ "", 0 }
};
#endif

int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int sleep_main(int argc UNUSED_PARAM, char **argv)
{
#if ENABLE_FEATURE_FLOAT_SLEEP
	double duration;
	struct timespec ts;
#else
	unsigned duration;
#endif

	++argv;
	if (!*argv)
		bb_show_usage();

#if ENABLE_FEATURE_FLOAT_SLEEP

	duration = 0;
	do {
		char *arg = *argv;
		if (strchr(arg, '.')) {
			double d;
			char *pp;
			int len = strspn(arg, "0123456789.");
			char sv = arg[len];
			arg[len] = '\0';
			errno = 0;
			d = strtod(arg, &pp);
			if (errno || *pp)
				bb_show_usage();
			arg[len] = sv;
			len--;
			sv = arg[len];
			arg[len] = '1';
			duration += d * xatoul_sfx(&arg[len], sfx);
			arg[len] = sv;
		} else
			duration += xatoul_sfx(arg, sfx);
	} while (*++argv);

	ts.tv_sec = MAXINT(typeof(ts.tv_sec));
	ts.tv_nsec = 0;
	if (duration >= 0 && duration < ts.tv_sec) {
		ts.tv_sec = duration;
		ts.tv_nsec = (duration - ts.tv_sec) * 1000000000;
	}
	do {
		errno = 0;
		nanosleep(&ts, &ts);
	} while (errno == EINTR);

#elif ENABLE_FEATURE_FANCY_SLEEP

	duration = 0;
	do {
		duration += xatou_range_sfx(*argv, 0, UINT_MAX - duration, sfx);
	} while (*++argv);
	sleep(duration);

#else /* simple */

	duration = xatou(*argv);
	sleep(duration);
	// Off. If it's really needed, provide example why
	//if (sleep(duration)) {
	//	bb_perror_nomsg_and_die();
	//}

#endif

	return EXIT_SUCCESS;
}
1	niro	532	/* 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	niro	816	#include "libbb.h"
22	niro	532
23	niro	816	/* This is a NOFORK applet. Be very careful! */
24
25
26			#if ENABLE_FEATURE_FANCY_SLEEP \|\| ENABLE_FEATURE_FLOAT_SLEEP
27	niro	532	static const struct suffix_mult sfx[] = {
28			{ "s", 1 },
29			{ "m", 60 },
30			{ "h", 60*60 },
31			{ "d", 246060 },
32	niro	984	{ "", 0 }
33	niro	532	};
34			#endif
35
36	niro	816	int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
37			int sleep_main(int argc UNUSED_PARAM, char **argv)
38	niro	532	{
39	niro	816	#if ENABLE_FEATURE_FLOAT_SLEEP
40			double duration;
41			struct timespec ts;
42			#else
43			unsigned duration;
44			#endif
45	niro	532
46	niro	816	++argv;
47			if (!*argv)
48	niro	532	bb_show_usage();
49
50	niro	816	#if ENABLE_FEATURE_FLOAT_SLEEP
51
52	niro	532	duration = 0;
53			do {
54	niro	816	char arg = argv;
55			if (strchr(arg, '.')) {
56			double d;
57	niro	984	char *pp;
58	niro	816	int len = strspn(arg, "0123456789.");
59			char sv = arg[len];
60			arg[len] = '\0';
61	niro	984	errno = 0;
62			d = strtod(arg, &pp);
63			if (errno \|\| *pp)
64	niro	816	bb_show_usage();
65			arg[len] = sv;
66			len--;
67			sv = arg[len];
68			arg[len] = '1';
69			duration += d * xatoul_sfx(&arg[len], sfx);
70			arg[len] = sv;
71			} else
72			duration += xatoul_sfx(arg, sfx);
73	niro	532	} while (*++argv);
74
75	niro	816	ts.tv_sec = MAXINT(typeof(ts.tv_sec));
76			ts.tv_nsec = 0;
77			if (duration >= 0 && duration < ts.tv_sec) {
78			ts.tv_sec = duration;
79			ts.tv_nsec = (duration - ts.tv_sec) * 1000000000;
80	niro	532	}
81	niro	816	do {
82			errno = 0;
83			nanosleep(&ts, &ts);
84			} while (errno == EINTR);
85	niro	532
86	niro	816	#elif ENABLE_FEATURE_FANCY_SLEEP
87	niro	532
88	niro	816	duration = 0;
89			do {
90			duration += xatou_range_sfx(*argv, 0, UINT_MAX - duration, sfx);
91			} while (*++argv);
92			sleep(duration);
93	niro	532
94	niro	816	#else /* simple */
95	niro	532
96	niro	816	duration = xatou(*argv);
97			sleep(duration);
98			// Off. If it's really needed, provide example why
99			//if (sleep(duration)) {
100			// bb_perror_nomsg_and_die();
101			//}
102
103			#endif
104
105	niro	532	return EXIT_SUCCESS;
106			}