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 struct utimbuf timebuf;
45 char *reference_file = NULL;
47 #define reference_file NULL
48 #define timebuf (*(struct utimbuf*)NULL)
51 int status = EXIT_SUCCESS;
52 int flags = getopt32(argv, "c" USE_DESKTOP("r:")
54 USE_DESKTOP(, &reference_file));
56 flags &= 1; /* only -c bit is left */
64 xstat(reference_file, &stbuf);
65 timebuf.actime = stbuf.st_atime;
66 timebuf.modtime = stbuf.st_mtime;
70 if (utime(*argv, reference_file ? &timebuf : NULL)) {
71 if (errno == ENOENT) { /* no such file */
72 if (flags) { /* creation is disabled, so ignore */
75 /* Try to create the file. */
76 fd = open(*argv, O_RDWR | O_CREAT,
77 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
79 if ((fd >= 0) && !close(fd)) {
81 utime(*argv, &timebuf);
85 status = EXIT_FAILURE;
86 bb_simple_perror_msg(*argv);