1 /* $OpenBSD: touch.c,v 1.27 2022/01/29 00:06:26 cheloha Exp $ */
2 /* $NetBSD: touch.c,v 1.11 1995/08/31 22:10:06 jtc Exp $ */
3
4 /*
5 * Copyright (c) 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/types.h>
34 #include <sys/stat.h>
35 #include <sys/time.h>
36
37 #include <ctype.h>
38 #include <err.h>
39 #include <errno.h>
40 #include <fcntl.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <time.h>
45 #include <unistd.h>
46
47 void stime_arg1(char *, struct timespec *);
48 void stime_arg2(char *, int, struct timespec *);
49 void stime_argd(char *, struct timespec *);
50 void stime_file(char *, struct timespec *);
51 static void __dead usage(void);
52
53 int
main(int argc,char * argv[])54 main(int argc, char *argv[])
55 {
56 struct timespec ts[2];
57 int aflag, cflag, mflag, ch, fd, len, rval, timeset;
58 char *p;
59
60 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
61 err(1, "pledge");
62
63 aflag = cflag = mflag = timeset = 0;
64 while ((ch = getopt(argc, argv, "acd:fmr:t:")) != -1)
65 switch (ch) {
66 case 'a':
67 aflag = 1;
68 break;
69 case 'c':
70 cflag = 1;
71 break;
72 case 'd':
73 timeset = 1;
74 stime_argd(optarg, ts);
75 break;
76 case 'f':
77 break;
78 case 'm':
79 mflag = 1;
80 break;
81 case 'r':
82 timeset = 1;
83 stime_file(optarg, ts);
84 break;
85 case 't':
86 timeset = 1;
87 stime_arg1(optarg, ts);
88 break;
89 default:
90 usage();
91 }
92 argc -= optind;
93 argv += optind;
94
95 /* Default is both -a and -m. */
96 if (aflag == 0 && mflag == 0)
97 aflag = mflag = 1;
98
99 /*
100 * If no -r or -t flag, at least two operands, the first of which
101 * is an 8 or 10 digit number, use the obsolete time specification.
102 */
103 if (!timeset && argc > 1) {
104 (void)strtol(argv[0], &p, 10);
105 len = p - argv[0];
106 if (*p == '\0' && (len == 8 || len == 10)) {
107 timeset = 1;
108 stime_arg2(*argv++, len == 10, ts);
109 }
110 }
111
112 /* Otherwise use the current time of day. */
113 if (!timeset)
114 ts[0].tv_nsec = ts[1].tv_nsec = UTIME_NOW;
115
116 if (!aflag)
117 ts[0].tv_nsec = UTIME_OMIT;
118 if (!mflag)
119 ts[1].tv_nsec = UTIME_OMIT;
120
121 if (*argv == NULL)
122 usage();
123
124 for (rval = 0; *argv; ++argv) {
125 /* Update the file's timestamp if it exists. */
126 if (! utimensat(AT_FDCWD, *argv, ts, 0))
127 continue;
128 if (errno != ENOENT) {
129 rval = 1;
130 warn("%s", *argv);
131 continue;
132 }
133
134 /* Didn't exist; should we create it? */
135 if (cflag)
136 continue;
137
138 /* Create the file. */
139 fd = open(*argv, O_WRONLY | O_CREAT, DEFFILEMODE);
140 if (fd == -1) {
141 rval = 1;
142 warn("%s", *argv);
143 continue;
144 }
145 if (futimens(fd, ts) == -1) {
146 warn("%s", *argv);
147 rval = 1;
148 }
149 if (close(fd) == -1) {
150 warn("%s", *argv);
151 rval = 1;
152 }
153 }
154 return rval;
155 }
156
157 #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
158
159 void
stime_arg1(char * arg,struct timespec * tsp)160 stime_arg1(char *arg, struct timespec *tsp)
161 {
162 struct tm *lt;
163 time_t tmptime;
164 int yearset;
165 char *dot, *p;
166 /* Start with the current time. */
167 tmptime = time(NULL);
168 if ((lt = localtime(&tmptime)) == NULL)
169 err(1, "localtime");
170 /* [[CC]YY]MMDDhhmm[.SS] */
171 for (p = arg, dot = NULL; *p != '\0'; p++) {
172 if (*p == '.' && dot == NULL)
173 dot = p;
174 else if (!isdigit((unsigned char)*p))
175 goto terr;
176 }
177 if (dot == NULL)
178 lt->tm_sec = 0; /* Seconds defaults to 0. */
179 else {
180 *dot++ = '\0';
181 if (strlen(dot) != 2)
182 goto terr;
183 lt->tm_sec = ATOI2(dot);
184 if (lt->tm_sec > 61) /* Could be leap second. */
185 goto terr;
186 }
187
188 yearset = 0;
189 switch (strlen(arg)) {
190 case 12: /* CCYYMMDDhhmm */
191 lt->tm_year = (ATOI2(arg) * 100) - 1900;
192 yearset = 1;
193 /* FALLTHROUGH */
194 case 10: /* YYMMDDhhmm */
195 if (yearset) {
196 yearset = ATOI2(arg);
197 lt->tm_year += yearset;
198 } else {
199 yearset = ATOI2(arg);
200 /* POSIX logic: [00,68]=>20xx, [69,99]=>19xx */
201 lt->tm_year = yearset;
202 if (yearset < 69)
203 lt->tm_year += 100;
204 }
205 /* FALLTHROUGH */
206 case 8: /* MMDDhhmm */
207 lt->tm_mon = ATOI2(arg);
208 if (lt->tm_mon > 12 || lt->tm_mon == 0)
209 goto terr;
210 --lt->tm_mon; /* Convert from 01-12 to 00-11 */
211 lt->tm_mday = ATOI2(arg);
212 if (lt->tm_mday > 31 || lt->tm_mday == 0)
213 goto terr;
214 lt->tm_hour = ATOI2(arg);
215 if (lt->tm_hour > 23)
216 goto terr;
217 lt->tm_min = ATOI2(arg);
218 if (lt->tm_min > 59)
219 goto terr;
220 break;
221 default:
222 goto terr;
223 }
224
225 lt->tm_isdst = -1; /* Figure out DST. */
226 tsp[0].tv_sec = tsp[1].tv_sec = mktime(lt);
227 if (tsp[0].tv_sec == -1)
228 terr: errx(1,
229 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
230
231 tsp[0].tv_nsec = tsp[1].tv_nsec = 0;
232 }
233
234 void
stime_arg2(char * arg,int year,struct timespec * tsp)235 stime_arg2(char *arg, int year, struct timespec *tsp)
236 {
237 struct tm *lt;
238 time_t tmptime;
239 /* Start with the current time. */
240 tmptime = time(NULL);
241 if ((lt = localtime(&tmptime)) == NULL)
242 err(1, "localtime");
243
244 lt->tm_mon = ATOI2(arg); /* MMDDhhmm[YY] */
245 if (lt->tm_mon > 12 || lt->tm_mon == 0)
246 goto terr;
247 --lt->tm_mon; /* Convert from 01-12 to 00-11 */
248 lt->tm_mday = ATOI2(arg);
249 if (lt->tm_mday > 31 || lt->tm_mday == 0)
250 goto terr;
251 lt->tm_hour = ATOI2(arg);
252 if (lt->tm_hour > 23)
253 goto terr;
254 lt->tm_min = ATOI2(arg);
255 if (lt->tm_min > 59)
256 goto terr;
257 if (year) {
258 year = ATOI2(arg);
259 /* POSIX logic: [00,68]=>20xx, [69,99]=>19xx */
260 lt->tm_year = year;
261 if (year < 69)
262 lt->tm_year += 100;
263 }
264 lt->tm_sec = 0;
265
266 lt->tm_isdst = -1; /* Figure out DST. */
267 tsp[0].tv_sec = tsp[1].tv_sec = mktime(lt);
268 if (tsp[0].tv_sec == -1)
269 terr: errx(1,
270 "out of range or illegal time specification: MMDDhhmm[YY]");
271
272 tsp[0].tv_nsec = tsp[1].tv_nsec = 0;
273 }
274
275 void
stime_file(char * fname,struct timespec * tsp)276 stime_file(char *fname, struct timespec *tsp)
277 {
278 struct stat sb;
279
280 if (stat(fname, &sb))
281 err(1, "%s", fname);
282 tsp[0] = sb.st_atim;
283 tsp[1] = sb.st_mtim;
284 }
285
286 void
stime_argd(char * arg,struct timespec * tsp)287 stime_argd(char *arg, struct timespec *tsp)
288 {
289 struct tm tm;
290 char *frac, *p;
291 int utc = 0;
292
293 /* accept YYYY-MM-DD(T| )hh:mm:ss[(.|,)frac][Z] */
294 memset(&tm, 0, sizeof(tm));
295 p = strptime(arg, "%F", &tm);
296 if (p == NULL || (*p != 'T' && *p != ' '))
297 goto terr;
298 p = strptime(p + 1, "%T", &tm);
299 if (p == NULL)
300 goto terr;
301 tsp[0].tv_nsec = 0;
302 if (*p == '.' || *p == ',') {
303 frac = ++p;
304 while (isdigit((unsigned char)*p)) {
305 if (p - frac < 9) {
306 tsp[0].tv_nsec = tsp[0].tv_nsec * 10 +
307 *p - '0';
308 }
309 p++;
310 }
311 if (p == frac)
312 goto terr;
313
314 /* fill in the trailing zeros */
315 while (p - frac-- < 9)
316 tsp[0].tv_nsec *= 10;
317 }
318 if (*p == 'Z') {
319 utc = 1;
320 p++;
321 }
322 if (*p != '\0')
323 goto terr;
324
325 tm.tm_isdst = -1;
326 tsp[0].tv_sec = utc ? timegm(&tm) : mktime(&tm);
327 if (tsp[0].tv_sec == -1)
328 terr: errx(1,
329 "out of range or illegal time specification: YYYY-MM-DDThh:mm:ss[.frac][Z]");
330 tsp[1] = tsp[0];
331 }
332
333 static void __dead
usage(void)334 usage(void)
335 {
336 (void)fprintf(stderr,
337 "usage: touch [-acm] [-d ccyy-mm-ddTHH:MM:SS[.frac][Z]] [-r file]\n"
338 " [-t [[cc]yy]mmddHHMM[.SS]] file ...\n");
339 exit(1);
340 }
341