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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
35 static const char copyright[] =
36 "@(#) Copyright (c) 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
41 static const char sccsid[] = "@(#)touch.c 8.1 (Berkeley) 6/6/93";
44 #include <sys/types.h>
58 int rw(char *, struct stat *, int);
59 void stime_arg1(char *, struct timeval *);
60 void stime_arg2(char *, int, struct timeval *);
61 void stime_file(char *, struct timeval *);
62 int timeoffset(char *);
66 main(int argc, char *argv[])
70 int (*stat_f)(const char *, struct stat *);
71 int (*utimes_f)(const char *, const struct timeval *);
72 int Aflag, aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset;
76 myname = basename(argv[0]);
77 Aflag = aflag = cflag = fflag = mflag = timeset = 0;
80 if (gettimeofday(&tv[0], NULL))
81 err(1, "gettimeofday");
83 while ((ch = getopt(argc, argv, "A:acfhmr:t:")) != -1)
86 Aflag = timeoffset(optarg);
107 stime_file(optarg, tv);
111 stime_arg1(optarg, tv);
120 if (aflag == 0 && mflag == 0)
126 * We're setting the time to an offset from a specified
127 * time. God knows why, but it means that we can set
128 * that time once and for all here.
131 tv[0].tv_sec += Aflag;
133 tv[1].tv_sec += Aflag;
134 Aflag = 0; /* done our job */
138 * If no -r or -t flag, at least two operands, the first of
139 * which is an 8 or 10 digit number, use the obsolete time
140 * specification, otherwise use the current time.
143 strtol(argv[0], &p, 10);
145 if (*p == '\0' && (len == 8 || len == 10)) {
147 stime_arg2(*argv++, len == 10, tv);
150 /* Both times default to the same. */
160 for (rval = 0; *argv; ++argv) {
161 /* See if the file exists. */
162 if (stat_f(*argv, &sb) != 0) {
163 if (errno != ENOENT) {
169 /* Create the file. */
171 O_WRONLY | O_CREAT, DEFFILEMODE);
172 if (fd == -1 || fstat(fd, &sb) || close(fd)) {
178 /* If using the current time, we're done. */
186 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim);
188 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim);
191 * We're adjusting the times based on the file times, not a
192 * specified time (that gets handled above).
196 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim);
197 tv[0].tv_sec += Aflag;
200 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim);
201 tv[1].tv_sec += Aflag;
206 if (!utimes_f(*argv, tv))
209 /* If the user specified a time, nothing else we can do. */
210 if (timeset || Aflag) {
217 * System V and POSIX 1003.1 require that a NULL argument
218 * set the access/modification times to the current time.
219 * The permission checks are different, too, in that the
220 * ability to write the file is sufficient. Take a shot.
222 if (!utimes_f(*argv, NULL))
225 /* Try reading/writing. */
226 if (!S_ISLNK(sb.st_mode) && !S_ISDIR(sb.st_mode)) {
227 if (rw(*argv, &sb, fflag))
237 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
240 stime_arg1(char *arg, struct timeval *tvp)
246 /* Start with the current time. */
248 if ((t = localtime(&now)) == NULL)
250 /* [[CC]YY]MMDDhhmm[.SS] */
251 if ((p = strchr(arg, '.')) == NULL)
252 t->tm_sec = 0; /* Seconds defaults to 0. */
254 if (strlen(p + 1) != 2)
257 t->tm_sec = ATOI2(p);
261 switch(strlen(arg)) {
262 case 12: /* CCYYMMDDhhmm */
263 t->tm_year = ATOI2(arg);
267 case 10: /* YYMMDDhhmm */
269 yearset = ATOI2(arg);
270 t->tm_year += yearset;
272 yearset = ATOI2(arg);
274 t->tm_year = yearset + 2000;
276 t->tm_year = yearset + 1900;
278 t->tm_year -= 1900; /* Convert to UNIX time. */
280 case 8: /* MMDDhhmm */
281 t->tm_mon = ATOI2(arg);
282 --t->tm_mon; /* Convert from 01-12 to 00-11 */
283 t->tm_mday = ATOI2(arg);
284 t->tm_hour = ATOI2(arg);
285 t->tm_min = ATOI2(arg);
291 t->tm_isdst = -1; /* Figure out DST. */
292 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
293 if (tvp[0].tv_sec == -1)
295 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
297 tvp[0].tv_usec = tvp[1].tv_usec = 0;
301 stime_arg2(char *arg, int year, struct timeval *tvp)
305 /* Start with the current time. */
307 if ((t = localtime(&now)) == NULL)
310 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */
311 --t->tm_mon; /* Convert from 01-12 to 00-11 */
312 t->tm_mday = ATOI2(arg);
313 t->tm_hour = ATOI2(arg);
314 t->tm_min = ATOI2(arg);
316 t->tm_year = ATOI2(arg);
317 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */
321 t->tm_isdst = -1; /* Figure out DST. */
322 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
323 if (tvp[0].tv_sec == -1)
325 "out of range or illegal time specification: MMDDhhmm[yy]");
327 tvp[0].tv_usec = tvp[1].tv_usec = 0;
330 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */
332 timeoffset(char *arg)
341 switch (strlen(arg)) {
342 default: /* invalid */
343 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS");
349 offset = offset * 60 + ATOI2(arg);
352 offset = offset * 60 + ATOI2(arg);
361 stime_file(char *fname, struct timeval *tvp)
365 if (stat(fname, &sb))
367 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atim);
368 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtim);
372 rw(char *fname, struct stat *sbp, int force)
374 int fd, needed_chmod, rval;
377 /* Try regular files. */
378 if (!S_ISREG(sbp->st_mode)) {
379 warnx("%s: %s", fname, strerror(EFTYPE));
383 needed_chmod = rval = 0;
384 if ((fd = open(fname, O_RDWR, 0)) == -1) {
385 if (!force || chmod(fname, DEFFILEMODE))
387 if ((fd = open(fname, O_RDWR, 0)) == -1)
392 if (sbp->st_size != 0) {
393 if (read(fd, &byte, sizeof(byte)) != sizeof(byte))
395 if (lseek(fd, (off_t)0, SEEK_SET) == -1)
397 if (write(fd, &byte, sizeof(byte)) != sizeof(byte))
400 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) {
403 } else if (ftruncate(fd, (off_t)0)) {
405 warn("%s: file modified", fname);
409 if (close(fd) && rval != 1) {
413 if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) {
415 warn("%s: permissions modified", fname);
423 fprintf(stderr, "usage:\n" "%s [-A [-][[hh]mm]SS] [-acfhm] [-r file] "
424 "[-t [[CC]YY]MMDDhhmm[.SS]] file ...\n", myname);