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	niro	532	/* 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	niro	816	#include "libbb.h"
21	niro	532
22	niro	816	/* 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	niro	532	{
43	niro	984	int fd;
44			int status = EXIT_SUCCESS;
45			int opts;
46	niro	816	#if ENABLE_DESKTOP
47	niro	984	# 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	niro	816	char *reference_file = NULL;
56	niro	984	char *date_str = NULL;
57			struct timeval timebuf[2];
58			timebuf[1].tv_usec = timebuf[0].tv_usec = 0;
59	niro	816	#else
60	niro	984	# define reference_file NULL
61			# define date_str NULL
62			# define timebuf ((struct timeval*)NULL)
63	niro	816	#endif
64	niro	984
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	niro	816	/ignored:/ "fma"
73	niro	984	IF_DESKTOP(, &reference_file)
74			IF_DESKTOP(, &date_str)
75			IF_DESKTOP(, &date_str)
76			);
77	niro	532
78	niro	984	opts &= 1; /* only -c bit is left */
79	niro	532	argv += optind;
80			if (!*argv) {
81			bb_show_usage();
82			}
83
84	niro	816	if (reference_file) {
85			struct stat stbuf;
86			xstat(reference_file, &stbuf);
87	niro	984	timebuf[1].tv_sec = timebuf[0].tv_sec = stbuf.st_mtime;
88	niro	816	}
89
90	niro	984	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	niro	532	do {
107	niro	984	if (utimes(*argv, (reference_file \|\| date_str) ? timebuf : NULL) != 0) {
108	niro	816	if (errno == ENOENT) { /* no such file */
109	niro	984	if (opts) { /* creation is disabled, so ignore */
110	niro	532	continue;
111			}
112	niro	984	/* 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	niro	532	continue;
119			}
120			}
121			status = EXIT_FAILURE;
122	niro	816	bb_simple_perror_msg(*argv);
123	niro	532	}
124			} while (*++argv);
125
126			return status;
127			}