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
24int touch_main(int argc, char **argv);
25int touch_main(int argc, char **argv)
26{
27	int fd;
28	int status = EXIT_SUCCESS;
29	int flags = getopt32(argv, "c");
30
31	argv += optind;
32
33	if (!*argv) {
34		bb_show_usage();
35	}
36
37	do {
38		if (utime(*argv, NULL)) {
39			if (errno == ENOENT) {	/* no such file */
40				if (flags) {	/* Creation is disabled, so ignore. */
41					continue;
42				}
43				/* Try to create the file. */
44				fd = open(*argv, O_RDWR | O_CREAT,
45						  S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
46						  );
47				if ((fd >= 0) && !close(fd)) {
48					continue;
49				}
50			}
51			status = EXIT_FAILURE;
52			bb_perror_msg("%s", *argv);
53		}
54	} while (*++argv);
55
56	return status;
57}
58