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)
44 int status = EXIT_SUCCESS;
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"
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;
60 # define reference_file NULL
61 # define date_str NULL
62 # define timebuf (*(struct timeval*)NULL)
65 #if ENABLE_DESKTOP && ENABLE_LONG_OPTS
66 applet_long_options = touch_longopts;
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:")
73 IF_DESKTOP(, &reference_file)
74 IF_DESKTOP(, &date_str)
75 IF_DESKTOP(, &date_str)
78 opts &= 1; /* only -c bit is left */
86 xstat(reference_file, &stbuf);
87 timebuf[1].tv_sec = timebuf[0].tv_sec = stbuf.st_mtime;
95 //localtime_r(&t, &tm_time);
96 memset(&tm_time, 0, sizeof(tm_time));
97 parse_datestr(date_str, &tm_time);
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);
103 timebuf[1].tv_sec = timebuf[0].tv_sec = t;
107 if (utimes(*argv, reference_file ? timebuf : NULL)) {
108 if (errno == ENOENT) { /* no such file */
109 if (opts) { /* creation is disabled, so ignore */
112 /* Try to create the file. */
113 fd = open(*argv, O_RDWR | O_CREAT,
114 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
116 if ((fd >= 0) && !close(fd)) {
118 utimes(*argv, timebuf);
122 status = EXIT_FAILURE;
123 bb_simple_perror_msg(*argv);