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
34 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 static const char copyright[] =
40 "@(#) Copyright (c) 1993\n\
41 The Regents of the University of California. All rights reserved.\n";
45 static const char sccsid[] = "@(#)touch.c 8.1 (Berkeley) 6/6/93";
48 #include <sys/types.h>
61 int rw(char *, struct stat *, int);
62 void stime_arg1(char *, struct timeval *);
63 void stime_arg2(char *, int, struct timeval *);
64 void stime_file(char *, struct timeval *);
68 main(int argc, char *argv[])
72 int (*stat_f)(const char *, struct stat *);
73 int (*utimes_f)(const char *, const struct timeval *);
74 int aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset;
77 aflag = cflag = fflag = mflag = timeset = 0;
80 if (gettimeofday(&tv[0], NULL))
81 err(1, "gettimeofday");
83 while ((ch = getopt(argc, argv, "acfhmr:t:")) != -1)
104 stime_file(optarg, tv);
108 stime_arg1(optarg, tv);
117 /* Default is both -a and -m. */
118 if (aflag == 0 && mflag == 0)
122 * If no -r or -t flag, at least two operands, the first of which
123 * is an 8 or 10 digit number, use the obsolete time specification.
125 if (!timeset && argc > 1) {
126 (void)strtol(argv[0], &p, 10);
128 if (*p == '\0' && (len == 8 || len == 10)) {
130 stime_arg2(*argv++, len == 10, tv);
134 /* Otherwise use the current time of day. */
141 for (rval = 0; *argv; ++argv) {
142 /* See if the file exists. */
143 if (stat_f(*argv, &sb) != 0) {
145 /* Create the file. */
147 O_WRONLY | O_CREAT, DEFFILEMODE);
148 if (fd == -1 || fstat(fd, &sb) || close(fd)) {
154 /* If using the current time, we're done. */
162 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec);
164 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec);
167 if (!utimes_f(*argv, tv))
170 /* If the user specified a time, nothing else we can do. */
177 * System V and POSIX 1003.1 require that a NULL argument
178 * set the access/modification times to the current time.
179 * The permission checks are different, too, in that the
180 * ability to write the file is sufficient. Take a shot.
182 if (!utimes_f(*argv, NULL))
185 /* Try reading/writing. */
186 if (!S_ISLNK(sb.st_mode) && !S_ISDIR(sb.st_mode) &&
187 rw(*argv, &sb, fflag))
195 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
198 stime_arg1(char *arg, struct timeval *tvp)
204 /* Start with the current time. */
206 if ((t = localtime(&now)) == NULL)
208 /* [[CC]YY]MMDDhhmm[.SS] */
209 if ((p = strchr(arg, '.')) == NULL)
210 t->tm_sec = 0; /* Seconds defaults to 0. */
212 if (strlen(p + 1) != 2)
215 t->tm_sec = ATOI2(p);
219 switch(strlen(arg)) {
220 case 12: /* CCYYMMDDhhmm */
221 t->tm_year = ATOI2(arg);
225 case 10: /* YYMMDDhhmm */
227 yearset = ATOI2(arg);
228 t->tm_year += yearset;
230 yearset = ATOI2(arg);
232 t->tm_year = yearset + 2000;
234 t->tm_year = yearset + 1900;
236 t->tm_year -= 1900; /* Convert to UNIX time. */
238 case 8: /* MMDDhhmm */
239 t->tm_mon = ATOI2(arg);
240 --t->tm_mon; /* Convert from 01-12 to 00-11 */
241 t->tm_mday = ATOI2(arg);
242 t->tm_hour = ATOI2(arg);
243 t->tm_min = ATOI2(arg);
249 t->tm_isdst = -1; /* Figure out DST. */
250 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
251 if (tvp[0].tv_sec == -1)
253 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
255 tvp[0].tv_usec = tvp[1].tv_usec = 0;
259 stime_arg2(char *arg, int year, struct timeval *tvp)
263 /* Start with the current time. */
265 if ((t = localtime(&now)) == NULL)
268 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */
269 --t->tm_mon; /* Convert from 01-12 to 00-11 */
270 t->tm_mday = ATOI2(arg);
271 t->tm_hour = ATOI2(arg);
272 t->tm_min = ATOI2(arg);
274 t->tm_year = ATOI2(arg);
275 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */
279 t->tm_isdst = -1; /* Figure out DST. */
280 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
281 if (tvp[0].tv_sec == -1)
283 "out of range or illegal time specification: MMDDhhmm[yy]");
285 tvp[0].tv_usec = tvp[1].tv_usec = 0;
289 stime_file(char *fname, struct timeval *tvp)
293 if (stat(fname, &sb))
295 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec);
296 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec);
300 rw(char *fname, struct stat *sbp, int force)
302 int fd, needed_chmod, rval;
305 /* Try regular files. */
306 if (!S_ISREG(sbp->st_mode)) {
307 warnx("%s: %s", fname, strerror(EFTYPE));
311 needed_chmod = rval = 0;
312 if ((fd = open(fname, O_RDWR, 0)) == -1) {
313 if (!force || chmod(fname, DEFFILEMODE))
315 if ((fd = open(fname, O_RDWR, 0)) == -1)
320 if (sbp->st_size != 0) {
321 if (read(fd, &byte, sizeof(byte)) != sizeof(byte))
323 if (lseek(fd, (off_t)0, SEEK_SET) == -1)
325 if (write(fd, &byte, sizeof(byte)) != sizeof(byte))
328 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) {
331 } else if (ftruncate(fd, (off_t)0)) {
333 warn("%s: file modified", fname);
337 if (close(fd) && rval != 1) {
341 if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) {
343 warn("%s: permissions modified", fname);
351 (void)fprintf(stderr, "usage: touch [-acfhm] [-r file] [-t [[CC]YY]MMDDhhmm[.SS]] file ...\n");