3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1993 The Regents of the University of California. All rights reserved.
34 * @(#)touch.c 8.1 (Berkeley) 6/6/93
35 * $FreeBSD: src/usr.bin/touch/touch.c,v 1.11.2.2 2002/07/28 06:52:15 eric Exp $
36 * $DragonFly: src/usr.bin/touch/touch.c,v 1.8 2004/09/14 00:13:36 drhodus Exp $
39 #include <sys/types.h>
52 static int rw(const char *, const struct stat *, int);
53 static void stime_arg1(const char *, struct timeval *);
54 static void stime_arg2(const char *, int, struct timeval *);
55 static void stime_file(const char *, struct timeval *);
56 static void usage(void);
59 main(int argc, char **argv)
63 int aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset;
66 aflag = cflag = fflag = mflag = timeset = 0;
67 if (gettimeofday(&tv[0], NULL) == -1)
68 err(1, "gettimeofday");
70 while ((ch = getopt(argc, argv, "acfmr:t:")) != -1)
86 stime_file(optarg, tv);
90 stime_arg1(optarg, tv);
98 /* Default is both -a and -m. */
99 if (aflag == 0 && mflag == 0)
103 * If no -r or -t flag, at least two operands, the first of which
104 * is an 8 or 10 digit number, use the obsolete time specification.
106 if (!timeset && argc > 1) {
107 strtol(argv[0], &p, 10);
109 if (*p == '\0' && (len == 8 || len == 10)) {
111 stime_arg2(*argv++, len == 10, tv);
115 /* Otherwise use the current time of day. */
122 for (rval = 0; *argv; ++argv) {
123 /* See if the file exists. */
124 if (stat(*argv, &sb)) {
126 /* Create the file. */
128 O_WRONLY | O_CREAT, DEFFILEMODE);
129 if (fd == -1 || fstat(fd, &sb) || close(fd)) {
135 /* If using the current time, we're done. */
143 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec);
145 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec);
148 if (!utimes(*argv, tv))
151 /* If the user specified a time, nothing else we can do. */
158 * System V and POSIX 1003.1 require that a NULL argument
159 * set the access/modification times to the current time.
160 * The permission checks are different, too, in that the
161 * ability to write the file is sufficient. Take a shot.
163 if (!utimes(*argv, NULL))
166 /* Try reading/writing. */
167 if (!S_ISLNK(sb.st_mode) && !S_ISDIR(sb.st_mode) &&
168 rw(*argv, &sb, fflag))
176 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
179 stime_arg1(const char *arg, struct timeval *tvp)
185 /* Start with the current time. */
187 if ((t = localtime(&now)) == NULL)
189 /* [[CC]YY]MMDDhhmm[.SS] */
190 if ((p = strchr(arg, '.')) == NULL) {
191 t->tm_sec = 0; /* Seconds defaults to 0. */
193 if (strlen(p + 1) != 2)
196 t->tm_sec = ATOI2(p);
200 switch(strlen(arg)) {
201 case 12: /* CCYYMMDDhhmm */
202 t->tm_year = ATOI2(arg);
206 case 10: /* YYMMDDhhmm */
208 yearset = ATOI2(arg);
209 t->tm_year += yearset;
211 yearset = ATOI2(arg);
213 t->tm_year = yearset + 2000;
215 t->tm_year = yearset + 1900;
217 t->tm_year -= 1900; /* Convert to UNIX time. */
219 case 8: /* MMDDhhmm */
220 t->tm_mon = ATOI2(arg);
221 --t->tm_mon; /* Convert from 01-12 to 00-11 */
222 t->tm_mday = ATOI2(arg);
223 t->tm_hour = ATOI2(arg);
224 t->tm_min = ATOI2(arg);
230 t->tm_isdst = -1; /* Figure out DST. */
231 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
232 if (tvp[0].tv_sec == -1)
235 tvp[0].tv_usec = tvp[1].tv_usec = 0;
239 errx(1, "out of range or illegal time "
240 "specification: [[CC]YY]MMDDhhmm[.SS]");
244 stime_arg2(const char *arg, int year, struct timeval *tvp)
248 /* Start with the current time. */
250 if ((t = localtime(&now)) == NULL)
253 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */
254 --t->tm_mon; /* Convert from 01-12 to 00-11 */
255 t->tm_mday = ATOI2(arg);
256 t->tm_hour = ATOI2(arg);
257 t->tm_min = ATOI2(arg);
259 t->tm_year = ATOI2(arg);
260 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */
264 t->tm_isdst = -1; /* Figure out DST. */
265 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
266 if (tvp[0].tv_sec == -1)
267 errx(1, "out of range or illegal time "
268 "specification: MMDDhhmm[yy]");
270 tvp[0].tv_usec = tvp[1].tv_usec = 0;
274 stime_file(const char *fname, struct timeval *tvp)
278 if (stat(fname, &sb))
280 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec);
281 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec);
285 rw(const char *fname, const struct stat *sbp, int force)
287 int fd, needed_chmod;
288 const char *warn_msg = NULL;
291 /* Try regular files. */
292 if (!S_ISREG(sbp->st_mode)) {
293 warnx("%s: %s", fname, strerror(EFTYPE));
298 if ((fd = open(fname, O_RDWR, 0)) == -1) {
299 if (!force || chmod(fname, DEFFILEMODE))
301 if ((fd = open(fname, O_RDWR, 0)) == -1)
306 if (sbp->st_size != 0) {
307 if (read(fd, &byte, sizeof(byte)) != sizeof(byte))
309 if (lseek(fd, (off_t)0, SEEK_SET) == -1)
311 if (write(fd, &byte, sizeof(byte)) != sizeof(byte))
314 if (write(fd, &byte, sizeof(byte)) != sizeof(byte))
316 if (ftruncate(fd, (off_t)0)) {
317 warn_msg = "%s: file modified";
324 if (needed_chmod && chmod(fname, sbp->st_mode)) {
325 warn_msg = "%s: permissions modified";
331 if (warn_msg != NULL)
332 warnx(warn_msg, fname);
341 fprintf(stderr, "usage: touch [-acfm] [-r file] "
342 "[-t [[CC]YY]MMDDhhmm[.SS]] file ...\n");