1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/types.h>
33 #include <sys/stat.h>
34 #include <sys/time.h>
35
36 #include <ctype.h>
37 #include <err.h>
38 #include <errno.h>
39 #include <fcntl.h>
40 #include <libgen.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <time.h>
45 #include <unistd.h>
46
47 static void stime_arg1(const char *, struct timespec *);
48 static void stime_arg2(const char *, int, struct timespec *);
49 static void stime_darg(const char *, struct timespec *);
50 static void stime_file(const char *, struct timespec *);
51 static int timeoffset(const char *);
52 static void usage(const char *);
53
54 int
main(int argc,char * argv[])55 main(int argc, char *argv[])
56 {
57 struct stat sb;
58 struct timespec ts[2];
59 int atflag;
60 int Aflag, aflag, cflag, mflag, ch, fd, len, rval, timeset;
61 char *p;
62 char *myname;
63
64 myname = basename(argv[0]);
65 Aflag = aflag = cflag = mflag = timeset = 0;
66 atflag = 0;
67 ts[0].tv_sec = ts[1].tv_sec = 0;
68 ts[0].tv_nsec = ts[1].tv_nsec = UTIME_NOW;
69
70 while ((ch = getopt(argc, argv, "A:acd:fhmr:t:")) != -1)
71 switch(ch) {
72 case 'A':
73 Aflag = timeoffset(optarg);
74 break;
75 case 'a':
76 aflag = 1;
77 break;
78 case 'c':
79 cflag = 1;
80 break;
81 case 'd':
82 timeset = 1;
83 stime_darg(optarg, ts);
84 break;
85 case 'f':
86 /* No-op for compatibility. */
87 break;
88 case 'h':
89 cflag = 1;
90 atflag = AT_SYMLINK_NOFOLLOW;
91 break;
92 case 'm':
93 mflag = 1;
94 break;
95 case 'r':
96 timeset = 1;
97 stime_file(optarg, ts);
98 break;
99 case 't':
100 timeset = 1;
101 stime_arg1(optarg, ts);
102 break;
103 default:
104 usage(myname);
105 }
106 argc -= optind;
107 argv += optind;
108
109 if (aflag == 0 && mflag == 0)
110 aflag = mflag = 1;
111
112 if (timeset) {
113 if (Aflag) {
114 /*
115 * We're setting the time to an offset from a specified
116 * time. God knows why, but it means that we can set
117 * that time once and for all here.
118 */
119 if (aflag)
120 ts[0].tv_sec += Aflag;
121 if (mflag)
122 ts[1].tv_sec += Aflag;
123 Aflag = 0; /* done our job */
124 }
125 } else {
126 /*
127 * If no -r or -t flag, at least two operands, the first of
128 * which is an 8 or 10 digit number, use the obsolete time
129 * specification, otherwise use the current time.
130 */
131 if (argc > 1) {
132 strtol(argv[0], &p, 10);
133 len = p - argv[0];
134 if (*p == '\0' && (len == 8 || len == 10)) {
135 timeset = 1;
136 stime_arg2(*argv++, len == 10, ts);
137 }
138 }
139 /* Both times default to the same. */
140 ts[1] = ts[0];
141 }
142
143 if (!aflag)
144 ts[0].tv_nsec = UTIME_OMIT;
145 if (!mflag)
146 ts[1].tv_nsec = UTIME_OMIT;
147
148 if (*argv == NULL)
149 usage(myname);
150
151 if (Aflag)
152 cflag = 1;
153
154 for (rval = 0; *argv; ++argv) {
155 /* See if the file exists. */
156 if (fstatat(AT_FDCWD, *argv, &sb, atflag) != 0) {
157 if (errno != ENOENT) {
158 rval = 1;
159 warn("%s", *argv);
160 continue;
161 }
162 if (!cflag) {
163 /* Create the file. */
164 fd = open(*argv,
165 O_WRONLY | O_CREAT, DEFFILEMODE);
166 if (fd < 0 || fstat(fd, &sb) < 0) {
167 rval = 1;
168 warn("%s", *argv);
169 if (fd >= 0)
170 (void)close(fd);
171 continue;
172 }
173 (void)close(fd);
174
175 /* If using the current time, we're done. */
176 if (!timeset)
177 continue;
178 } else
179 continue;
180 }
181
182 /*
183 * We're adjusting the times based on the file times, not a
184 * specified time (that gets handled above).
185 */
186 if (Aflag) {
187 if (aflag) {
188 ts[0] = sb.st_atim;
189 ts[0].tv_sec += Aflag;
190 }
191 if (mflag) {
192 ts[1] = sb.st_mtim;
193 ts[1].tv_sec += Aflag;
194 }
195 }
196
197 if (!utimensat(AT_FDCWD, *argv, ts, atflag))
198 continue;
199
200 rval = 1;
201 warn("%s", *argv);
202 }
203 exit(rval);
204 }
205
206 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
207
208 static void
stime_arg1(const char * arg,struct timespec * tvp)209 stime_arg1(const char *arg, struct timespec *tvp)
210 {
211 time_t now;
212 struct tm *t;
213 int yearset;
214 char *p;
215
216 now = time(NULL);
217 if ((t = localtime(&now)) == NULL)
218 err(1, "localtime");
219 /* [[CC]YY]MMDDhhmm[.SS] */
220 if ((p = strchr(arg, '.')) == NULL)
221 t->tm_sec = 0; /* Seconds defaults to 0. */
222 else {
223 if (strlen(p + 1) != 2)
224 goto terr;
225 *p++ = '\0';
226 t->tm_sec = ATOI2(p);
227 }
228
229 yearset = 0;
230 switch (strlen(arg)) {
231 case 12: /* CCYYMMDDhhmm */
232 t->tm_year = ATOI2(arg);
233 t->tm_year *= 100;
234 yearset = 1;
235 /* FALLTHROUGH */
236 case 10: /* YYMMDDhhmm */
237 if (yearset) {
238 yearset = ATOI2(arg);
239 t->tm_year += yearset;
240 } else {
241 yearset = ATOI2(arg);
242 if (yearset < 69)
243 t->tm_year = yearset + 2000;
244 else
245 t->tm_year = yearset + 1900;
246 }
247 t->tm_year -= 1900; /* Convert to UNIX time. */
248 /* FALLTHROUGH */
249 case 8: /* MMDDhhmm */
250 t->tm_mon = ATOI2(arg);
251 --t->tm_mon; /* Convert from 01-12 to 00-11 */
252 t->tm_mday = ATOI2(arg);
253 t->tm_hour = ATOI2(arg);
254 t->tm_min = ATOI2(arg);
255 break;
256 default:
257 goto terr;
258 }
259
260 t->tm_isdst = -1; /* Figure out DST. */
261 t->tm_yday = -1;
262 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
263 if (t->tm_yday == -1)
264 goto terr;
265
266 tvp[0].tv_nsec = tvp[1].tv_nsec = 0;
267 return;
268
269 terr:
270 errx(1, "out of range or illegal time specification: "
271 "[[CC]YY]MMDDhhmm[.SS]");
272 }
273
274 static void
stime_arg2(const char * arg,int year,struct timespec * tvp)275 stime_arg2(const char *arg, int year, struct timespec *tvp)
276 {
277 time_t now;
278 struct tm *t;
279
280 now = time(NULL);
281 if ((t = localtime(&now)) == NULL)
282 err(1, "localtime");
283
284 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */
285 --t->tm_mon; /* Convert from 01-12 to 00-11 */
286 t->tm_mday = ATOI2(arg);
287 t->tm_hour = ATOI2(arg);
288 t->tm_min = ATOI2(arg);
289 if (year) {
290 t->tm_year = ATOI2(arg);
291 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */
292 t->tm_year += 100;
293 }
294
295 t->tm_isdst = -1; /* Figure out DST. */
296 t->tm_yday = -1;
297 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
298 if (t->tm_yday == -1)
299 errx(1, "out of range or illegal time specification: "
300 "MMDDhhmm[yy]");
301
302 tvp[0].tv_nsec = tvp[1].tv_nsec = 0;
303 }
304
305 static void
stime_darg(const char * arg,struct timespec * tvp)306 stime_darg(const char *arg, struct timespec *tvp)
307 {
308 struct tm t = { .tm_sec = 0 };
309 const char *fmt, *colon;
310 char *p;
311 int val, isutc = 0;
312
313 tvp[0].tv_nsec = 0;
314 t.tm_isdst = -1;
315 colon = strchr(arg, ':');
316 if (colon == NULL || strchr(colon + 1, ':') == NULL)
317 goto bad;
318 fmt = strchr(arg, 'T') != NULL ? "%Y-%m-%dT%H:%M:%S" :
319 "%Y-%m-%d %H:%M:%S";
320 p = strptime(arg, fmt, &t);
321 if (p == NULL)
322 goto bad;
323 /* POSIX: must have at least one digit after dot */
324 if ((*p == '.' || *p == ',') && isdigit((unsigned char)p[1])) {
325 p++;
326 val = 100000000;
327 while (isdigit((unsigned char)*p)) {
328 tvp[0].tv_nsec += val * (*p - '0');
329 p++;
330 val /= 10;
331 }
332 }
333 if (*p == 'Z') {
334 isutc = 1;
335 p++;
336 }
337 if (*p != '\0')
338 goto bad;
339
340 t.tm_yday = -1;
341 tvp[0].tv_sec = isutc ? timegm(&t) : mktime(&t);
342 if (t.tm_yday == -1)
343 goto bad;
344
345 tvp[1] = tvp[0];
346 return;
347
348 bad:
349 errx(1, "out of range or illegal time specification: "
350 "YYYY-MM-DDThh:mm:SS[.frac][tz]");
351 }
352
353 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */
354 int
timeoffset(const char * arg)355 timeoffset(const char *arg)
356 {
357 int offset;
358 int isneg;
359
360 offset = 0;
361 isneg = *arg == '-';
362 if (isneg)
363 arg++;
364 switch (strlen(arg)) {
365 default: /* invalid */
366 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS");
367
368 case 6: /* HHMMSS */
369 offset = ATOI2(arg);
370 /* FALLTHROUGH */
371 case 4: /* MMSS */
372 offset = offset * 60 + ATOI2(arg);
373 /* FALLTHROUGH */
374 case 2: /* SS */
375 offset = offset * 60 + ATOI2(arg);
376 }
377 if (isneg)
378 return (-offset);
379 else
380 return (offset);
381 }
382
383 static void
stime_file(const char * fname,struct timespec * tsp)384 stime_file(const char *fname, struct timespec *tsp)
385 {
386 struct stat sb;
387
388 if (stat(fname, &sb))
389 err(1, "%s", fname);
390 tsp[0] = sb.st_atim;
391 tsp[1] = sb.st_mtim;
392 }
393
394 static void
usage(const char * myname)395 usage(const char *myname)
396 {
397 fprintf(stderr, "usage: %s [-A [-][[hh]mm]SS] [-achm] [-r file] "
398 "[-t [[CC]YY]MMDDhhmm[.SS]]\n"
399 " [-d YYYY-MM-DDThh:mm:SS[.frac][tz]] "
400 "file ...\n", myname);
401 exit(1);
402 }
403