busybox/coreutils/touch.c

/* vi: set sw=4 ts=4: */
/*
 * Mini touch implementation for busybox
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

/* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t not supported. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/touch.html */

/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
 *
 * Previous version called open() and then utime().  While this will be
 * be necessary to implement -r and -t, it currently only makes things bigger.
 * Also, exiting on a failure was a bug.  All args should be processed.
 */

#include "libbb.h"

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

/* coreutils implements:
 * -a   change only the access time
 * -c, --no-create
 *      do not create any files
 * -d, --date=STRING
 *      parse STRING and use it instead of current time
 * -f   (ignored, BSD compat)
 * -m   change only the modification time
 * -r, --reference=FILE
 *      use this file's times instead of current time
 * -t STAMP
 *      use [[CC]YY]MMDDhhmm[.ss] instead of current time
 * --time=WORD
 *      change the specified time: WORD is access, atime, or use
 */

int touch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int touch_main(int argc UNUSED_PARAM, char **argv)
{
	int fd;
	int status = EXIT_SUCCESS;
	int opts;
#if ENABLE_DESKTOP
# if ENABLE_LONG_OPTS
	static const char touch_longopts[] ALIGN1 =
		/* name, has_arg, val */
		"no-create\0"         No_argument       "c"
		"reference\0"         Required_argument "r"
		"date\0"              Required_argument "d"
	;
# endif
	char *reference_file = NULL;
	char *date_str = NULL;
	struct timeval timebuf[2];
	timebuf[1].tv_usec = timebuf[0].tv_usec = 0;
#else
# define reference_file NULL
# define date_str       NULL
# define timebuf        ((struct timeval*)NULL)
#endif

#if ENABLE_DESKTOP && ENABLE_LONG_OPTS
	applet_long_options = touch_longopts;
#endif
	/* -d and -t both set time. In coreutils,
	 * accepted data format differs a bit between -d and -t.
	 * We accept the same formats for both */
	opts = getopt32(argv, "c" IF_DESKTOP("r:d:t:")
				/*ignored:*/ "fma"
				IF_DESKTOP(, &reference_file)
				IF_DESKTOP(, &date_str)
				IF_DESKTOP(, &date_str)
	);

	opts &= 1; /* only -c bit is left */
	argv += optind;
	if (!*argv) {
		bb_show_usage();
	}

	if (reference_file) {
		struct stat stbuf;
		xstat(reference_file, &stbuf);
		timebuf[1].tv_sec = timebuf[0].tv_sec = stbuf.st_mtime;
	}

	if (date_str) {
		struct tm tm_time;
		time_t t;

		//time(&t);
		//localtime_r(&t, &tm_time);
		memset(&tm_time, 0, sizeof(tm_time));
		parse_datestr(date_str, &tm_time);

		/* Correct any day of week and day of year etc. fields */
		tm_time.tm_isdst = -1;	/* Be sure to recheck dst */
		t = validate_tm_time(date_str, &tm_time);

		timebuf[1].tv_sec = timebuf[0].tv_sec = t;
	}

	do {
		if (utimes(*argv, (reference_file || date_str) ? timebuf : NULL) != 0) {
			if (errno == ENOENT) { /* no such file */
				if (opts) { /* creation is disabled, so ignore */
					continue;
				}
				/* Try to create the file */
				fd = open(*argv, O_RDWR | O_CREAT, 0666);
				if (fd >= 0) {
					xclose(fd);
					if (reference_file || date_str)
						utimes(*argv, timebuf);
					continue;
				}
			}
			status = EXIT_FAILURE;
			bb_simple_perror_msg(*argv);
		}
	} while (*++argv);

	return status;
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* Mini touch implementation for busybox
4	*
5	* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6	*
7	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8	*/
9
10	/* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t not supported. */
11	/* http://www.opengroup.org/onlinepubs/007904975/utilities/touch.html */
12
13	/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
14	*
15	* Previous version called open() and then utime(). While this will be
16	* be necessary to implement -r and -t, it currently only makes things bigger.
17	* Also, exiting on a failure was a bug. All args should be processed.
18	*/
19
20	#include "libbb.h"
21
22	/* This is a NOFORK applet. Be very careful! */
23
24	/* coreutils implements:
25	* -a change only the access time
26	* -c, --no-create
27	* do not create any files
28	* -d, --date=STRING
29	* parse STRING and use it instead of current time
30	* -f (ignored, BSD compat)
31	* -m change only the modification time
32	* -r, --reference=FILE
33	* use this file's times instead of current time
34	* -t STAMP
35	* use [[CC]YY]MMDDhhmm[.ss] instead of current time
36	* --time=WORD
37	* change the specified time: WORD is access, atime, or use
38	*/
39
40	int touch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
41	int touch_main(int argc UNUSED_PARAM, char **argv)
42	{
43	int fd;
44	int status = EXIT_SUCCESS;
45	int opts;
46	#if ENABLE_DESKTOP
47	# if ENABLE_LONG_OPTS
48	static const char touch_longopts[] ALIGN1 =
49	/* name, has_arg, val */
50	"no-create\0" No_argument "c"
51	"reference\0" Required_argument "r"
52	"date\0" Required_argument "d"
53	;
54	# endif
55	char *reference_file = NULL;
56	char *date_str = NULL;
57	struct timeval timebuf[2];
58	timebuf[1].tv_usec = timebuf[0].tv_usec = 0;
59	#else
60	# define reference_file NULL
61	# define date_str NULL
62	# define timebuf ((struct timeval*)NULL)
63	#endif
64
65	#if ENABLE_DESKTOP && ENABLE_LONG_OPTS
66	applet_long_options = touch_longopts;
67	#endif
68	/* -d and -t both set time. In coreutils,
69	* accepted data format differs a bit between -d and -t.
70	* We accept the same formats for both */
71	opts = getopt32(argv, "c" IF_DESKTOP("r:d:t:")
72	/ignored:/ "fma"
73	IF_DESKTOP(, &reference_file)
74	IF_DESKTOP(, &date_str)
75	IF_DESKTOP(, &date_str)
76	);
77
78	opts &= 1; /* only -c bit is left */
79	argv += optind;
80	if (!*argv) {
81	bb_show_usage();
82	}
83
84	if (reference_file) {
85	struct stat stbuf;
86	xstat(reference_file, &stbuf);
87	timebuf[1].tv_sec = timebuf[0].tv_sec = stbuf.st_mtime;
88	}
89
90	if (date_str) {
91	struct tm tm_time;
92	time_t t;
93
94	//time(&t);
95	//localtime_r(&t, &tm_time);
96	memset(&tm_time, 0, sizeof(tm_time));
97	parse_datestr(date_str, &tm_time);
98
99	/* Correct any day of week and day of year etc. fields */
100	tm_time.tm_isdst = -1; /* Be sure to recheck dst */
101	t = validate_tm_time(date_str, &tm_time);
102
103	timebuf[1].tv_sec = timebuf[0].tv_sec = t;
104	}
105
106	do {
107	if (utimes(*argv, (reference_file \|\| date_str) ? timebuf : NULL) != 0) {
108	if (errno == ENOENT) { /* no such file */
109	if (opts) { /* creation is disabled, so ignore */
110	continue;
111	}
112	/* Try to create the file */
113	fd = open(*argv, O_RDWR \| O_CREAT, 0666);
114	if (fd >= 0) {
115	xclose(fd);
116	if (reference_file \|\| date_str)
117	utimes(*argv, timebuf);
118	continue;
119	}
120	}
121	status = EXIT_FAILURE;
122	bb_simple_perror_msg(*argv);
123	}
124	} while (*++argv);
125
126	return status;
127	}