1 /* vi: set sw=4 ts=4: */
3 * Mini touch implementation for busybox
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
10 /* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t not supported. */
11 /* http://www.opengroup.org/onlinepubs/007904975/utilities/touch.html */
13 /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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.
22 /* This is a NOFORK applet. Be very careful! */
24 /* coreutils implements:
25 * -a change only the access time
27 * do not create any files
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
35 * use [[CC]YY]MMDDhhmm[.ss] instead of current time
37 * change the specified time: WORD is access, atime, or use
40 int touch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
41 int touch_main(int argc UNUSED_PARAM, char **argv)
45 static const char touch_longopts[] ALIGN1 =
46 /* name, has_arg, val */
47 "no-create\0" No_argument "c"
48 "reference\0" Required_argument "r"
49 "date\0" Required_argument "d"
52 struct utimbuf timebuf;
53 char *reference_file = NULL;
54 char *date_str = NULL;
56 # define reference_file NULL
57 # define date_str NULL
58 # define timebuf (*(struct utimbuf*)NULL)
61 int status = EXIT_SUCCESS;
64 #if ENABLE_DESKTOP && ENABLE_LONG_OPTS
65 applet_long_options = touch_longopts;
67 opts = getopt32(argv, "c" IF_DESKTOP("r:d:")
69 IF_DESKTOP(, &reference_file)
70 IF_DESKTOP(, &date_str)
73 opts &= 1; /* only -c bit is left */
81 xstat(reference_file, &stbuf);
82 timebuf.actime = stbuf.st_atime;
83 timebuf.modtime = stbuf.st_mtime;
91 //localtime_r(&t, &tm_time);
92 memset(&tm_time, 0, sizeof(tm_time));
93 parse_datestr(date_str, &tm_time);
95 /* Correct any day of week and day of year etc. fields */
96 tm_time.tm_isdst = -1; /* Be sure to recheck dst */
97 t = validate_tm_time(date_str, &tm_time);
104 if (utime(*argv, reference_file ? &timebuf : NULL)) {
105 if (errno == ENOENT) { /* no such file */
106 if (opts) { /* creation is disabled, so ignore */
109 /* Try to create the file. */
110 fd = open(*argv, O_RDWR | O_CREAT,
111 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
113 if ((fd >= 0) && !close(fd)) {
115 utime(*argv, &timebuf);
119 status = EXIT_FAILURE;
120 bb_simple_perror_msg(*argv);