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. 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
29 * @(#) Copyright (c) 1993 The Regents of the University of California. All rights reserved.
30 * @(#)touch.c 8.1 (Berkeley) 6/6/93
31 * $FreeBSD: src/usr.bin/touch/touch.c,v 1.29 2012/11/17 01:54:31 svnexp Exp $
34 #include <sys/types.h>
49 static void stime_arg1(const char *, struct timeval *);
50 static void stime_arg2(const char *, int, struct timeval *);
51 static void stime_darg(const char *, struct timeval *);
52 static void stime_file(const char *, struct timeval *);
53 static int timeoffset(const char *);
54 static void usage(const char *);
57 main(int argc, char *argv[])
61 int (*stat_f)(const char *, struct stat *);
62 int (*utimes_f)(const char *, const struct timeval *);
63 int Aflag, aflag, cflag, mflag, ch, fd, len, rval, timeset;
67 myname = basename(argv[0]);
68 Aflag = aflag = cflag = mflag = timeset = 0;
71 if (gettimeofday(&tv[0], NULL) == -1)
72 err(1, "gettimeofday");
74 while ((ch = getopt(argc, argv, "A:acd:fhmr:t:")) != -1)
77 Aflag = timeoffset(optarg);
87 stime_darg(optarg, tv);
90 /* No-op for compatibility. */
102 stime_file(optarg, tv);
106 stime_arg1(optarg, tv);
114 if (aflag == 0 && mflag == 0)
120 * We're setting the time to an offset from a specified
121 * time. God knows why, but it means that we can set
122 * that time once and for all here.
125 tv[0].tv_sec += Aflag;
127 tv[1].tv_sec += Aflag;
128 Aflag = 0; /* done our job */
132 * If no -r or -t flag, at least two operands, the first of
133 * which is an 8 or 10 digit number, use the obsolete time
134 * specification, otherwise use the current time.
137 strtol(argv[0], &p, 10);
139 if (*p == '\0' && (len == 8 || len == 10)) {
141 stime_arg2(*argv++, len == 10, tv);
144 /* Both times default to the same. */
154 for (rval = 0; *argv; ++argv) {
155 /* See if the file exists. */
156 if (stat_f(*argv, &sb) != 0) {
157 if (errno != ENOENT) {
163 /* Create the file. */
165 O_WRONLY | O_CREAT, DEFFILEMODE);
166 if (fd == -1 || fstat(fd, &sb) || close(fd)) {
172 /* If using the current time, we're done. */
180 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim);
182 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim);
185 * We're adjusting the times based on the file times, not a
186 * specified time (that gets handled above).
190 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim);
191 tv[0].tv_sec += Aflag;
194 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim);
195 tv[1].tv_sec += Aflag;
200 if (!utimes_f(*argv, tv))
203 /* If the user specified a time, nothing else we can do. */
204 if (timeset || Aflag) {
211 * System V and POSIX 1003.1 require that a NULL argument
212 * set the access/modification times to the current time.
213 * The permission checks are different, too, in that the
214 * ability to write the file is sufficient. Take a shot.
216 if (!utimes_f(*argv, NULL))
225 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
228 stime_arg1(const char *arg, struct timeval *tvp)
234 /* Start with the current time. */
236 if ((t = localtime(&now)) == NULL)
238 /* [[CC]YY]MMDDhhmm[.SS] */
239 if ((p = strchr(arg, '.')) == NULL) {
240 t->tm_sec = 0; /* Seconds defaults to 0. */
242 if (strlen(p + 1) != 2)
245 t->tm_sec = ATOI2(p);
249 switch(strlen(arg)) {
250 case 12: /* CCYYMMDDhhmm */
251 t->tm_year = ATOI2(arg);
255 case 10: /* YYMMDDhhmm */
257 yearset = ATOI2(arg);
258 t->tm_year += yearset;
260 yearset = ATOI2(arg);
262 t->tm_year = yearset + 2000;
264 t->tm_year = yearset + 1900;
266 t->tm_year -= 1900; /* Convert to UNIX time. */
268 case 8: /* MMDDhhmm */
269 t->tm_mon = ATOI2(arg);
270 --t->tm_mon; /* Convert from 01-12 to 00-11 */
271 t->tm_mday = ATOI2(arg);
272 t->tm_hour = ATOI2(arg);
273 t->tm_min = ATOI2(arg);
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)
284 tvp[0].tv_usec = tvp[1].tv_usec = 0;
288 errx(1, "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
292 stime_arg2(const char *arg, int year, struct timeval *tvp)
296 /* Start with the current time. */
298 if ((t = localtime(&now)) == NULL)
301 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */
302 --t->tm_mon; /* Convert from 01-12 to 00-11 */
303 t->tm_mday = ATOI2(arg);
304 t->tm_hour = ATOI2(arg);
305 t->tm_min = ATOI2(arg);
307 t->tm_year = ATOI2(arg);
308 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */
312 t->tm_isdst = -1; /* Figure out DST. */
313 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
314 if (tvp[0].tv_sec == -1)
316 "out of range or illegal time specification: MMDDhhmm[yy]");
318 tvp[0].tv_usec = tvp[1].tv_usec = 0;
322 stime_darg(const char *arg, struct timeval *tvp)
324 struct tm t = { .tm_sec = 0 };
325 const char *fmt, *colon;
331 colon = strchr(arg, ':');
332 if (colon == NULL || strchr(colon + 1, ':') == NULL)
334 fmt = strchr(arg, 'T') != NULL ? "%Y-%m-%dT%H:%M:%S" :
336 p = strptime(arg, fmt, &t);
339 /* POSIX: must have at least one digit after dot */
340 if ((*p == '.' || *p == ',') && isdigit((unsigned char)p[1])) {
343 while (isdigit((unsigned char)*p)) {
344 tvp[0].tv_usec += val * (*p - '0');
356 tvp[0].tv_sec = isutc ? timegm(&t) : mktime(&t);
362 errx(1, "out of range or illegal time specification: YYYY-MM-DDThh:mm:SS[.frac][tz]");
365 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */
367 timeoffset(const char *arg)
376 switch (strlen(arg)) {
377 default: /* invalid */
378 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS");
384 offset = offset * 60 + ATOI2(arg);
387 offset = offset * 60 + ATOI2(arg);
396 stime_file(const char *fname, struct timeval *tvp)
400 if (stat(fname, &sb))
402 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atim);
403 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtim);
407 usage(const char *myname)
409 fprintf(stderr, "usage: %s [-A [-][[hh]mm]SS] [-achm] [-r file] "
410 "[-t [[CC]YY]MMDDhhmm[.SS]]\n"
411 " [-d YYYY-MM-DDThh:mm:SS[.frac][tz]] "
412 "file ...\n", myname);