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1.9 ! millert 1: /* $OpenBSD: touch.c,v 1.8 2003/01/10 11:42:00 henning Exp $ */
1.1 deraadt 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.
1.9 ! millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 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: #ifndef lint
34: static char copyright[] =
35: "@(#) Copyright (c) 1993\n\
36: The Regents of the University of California. All rights reserved.\n";
37: #endif /* not lint */
38:
39: #ifndef lint
40: #if 0
41: static char sccsid[] = "@(#)touch.c 8.2 (Berkeley) 4/28/95";
42: #endif
1.9 ! millert 43: static char rcsid[] = "$OpenBSD: touch.c,v 1.8 2003/01/10 11:42:00 henning Exp $";
1.1 deraadt 44: #endif /* not lint */
45:
46: #include <sys/types.h>
47: #include <sys/stat.h>
48: #include <sys/time.h>
49:
50: #include <err.h>
51: #include <errno.h>
52: #include <fcntl.h>
53: #include <stdio.h>
54: #include <stdlib.h>
55: #include <string.h>
56: #include <locale.h>
57: #include <time.h>
1.5 pjanzen 58: #include <tzfile.h>
1.1 deraadt 59: #include <unistd.h>
60:
1.7 millert 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 *);
65: void usage(void);
1.1 deraadt 66:
67: int
68: main(argc, argv)
69: int argc;
70: char *argv[];
71: {
72: struct stat sb;
73: struct timeval tv[2];
74: int aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset;
75: char *p;
76:
77: setlocale(LC_ALL, "");
78:
79: aflag = cflag = fflag = mflag = timeset = 0;
80: if (gettimeofday(&tv[0], NULL))
81: err(1, "gettimeofday");
82:
1.3 millert 83: while ((ch = getopt(argc, argv, "acfmr:t:")) != -1)
1.1 deraadt 84: switch(ch) {
85: case 'a':
86: aflag = 1;
87: break;
88: case 'c':
89: cflag = 1;
90: break;
91: case 'f':
92: fflag = 1;
93: break;
94: case 'm':
95: mflag = 1;
96: break;
97: case 'r':
98: timeset = 1;
99: stime_file(optarg, tv);
100: break;
101: case 't':
102: timeset = 1;
103: stime_arg1(optarg, tv);
104: break;
105: case '?':
106: default:
107: usage();
108: }
109: argc -= optind;
110: argv += optind;
111:
112: /* Default is both -a and -m. */
113: if (aflag == 0 && mflag == 0)
114: aflag = mflag = 1;
115:
116: /*
117: * If no -r or -t flag, at least two operands, the first of which
118: * is an 8 or 10 digit number, use the obsolete time specification.
119: */
120: if (!timeset && argc > 1) {
121: (void)strtol(argv[0], &p, 10);
122: len = p - argv[0];
123: if (*p == '\0' && (len == 8 || len == 10)) {
124: timeset = 1;
125: stime_arg2(*argv++, len == 10, tv);
126: }
127: }
128:
129: /* Otherwise use the current time of day. */
130: if (!timeset)
131: tv[1] = tv[0];
132:
133: if (*argv == NULL)
134: usage();
135:
136: for (rval = 0; *argv; ++argv) {
137: /* See if the file exists. */
1.4 pjanzen 138: if (stat(*argv, &sb)) {
1.1 deraadt 139: if (!cflag) {
140: /* Create the file. */
141: fd = open(*argv,
142: O_WRONLY | O_CREAT, DEFFILEMODE);
143: if (fd == -1 || fstat(fd, &sb) || close(fd)) {
144: rval = 1;
145: warn("%s", *argv);
146: continue;
147: }
148:
149: /* If using the current time, we're done. */
150: if (!timeset)
151: continue;
152: } else
153: continue;
1.4 pjanzen 154: }
1.1 deraadt 155:
156: if (!aflag)
157: TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec);
158: if (!mflag)
159: TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec);
160:
161: /* Try utimes(2). */
162: if (!utimes(*argv, tv))
163: continue;
164:
165: /* If the user specified a time, nothing else we can do. */
166: if (timeset) {
167: rval = 1;
168: warn("%s", *argv);
169: }
170:
171: /*
172: * System V and POSIX 1003.1 require that a NULL argument
173: * set the access/modification times to the current time.
174: * The permission checks are different, too, in that the
175: * ability to write the file is sufficient. Take a shot.
176: */
177: if (!utimes(*argv, NULL))
178: continue;
179:
180: /* Try reading/writing. */
181: if (rw(*argv, &sb, fflag))
182: rval = 1;
183: }
184: exit(rval);
185: }
186:
1.6 pjanzen 187: #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
1.1 deraadt 188:
189: void
190: stime_arg1(arg, tvp)
191: char *arg;
192: struct timeval *tvp;
193: {
194: struct tm *t;
195: time_t tmptime;
196: int yearset;
197: char *p;
198: /* Start with the current time. */
199: tmptime = tvp[0].tv_sec;
200: if ((t = localtime(&tmptime)) == NULL)
201: err(1, "localtime");
202: /* [[CC]YY]MMDDhhmm[.SS] */
203: if ((p = strchr(arg, '.')) == NULL)
204: t->tm_sec = 0; /* Seconds defaults to 0. */
205: else {
206: if (strlen(p + 1) != 2)
207: goto terr;
208: *p++ = '\0';
209: t->tm_sec = ATOI2(p);
210: }
211:
212: yearset = 0;
213: switch(strlen(arg)) {
214: case 12: /* CCYYMMDDhhmm */
1.6 pjanzen 215: t->tm_year = ATOI2(arg) * 100 - TM_YEAR_BASE;
1.1 deraadt 216: yearset = 1;
1.8 henning 217: /* FALLTHROUGH */
1.1 deraadt 218: case 10: /* YYMMDDhhmm */
219: if (yearset) {
220: yearset = ATOI2(arg);
221: t->tm_year += yearset;
222: } else {
223: yearset = ATOI2(arg);
224: if (yearset < 69)
1.5 pjanzen 225: t->tm_year = yearset + 2000 - TM_YEAR_BASE;
1.1 deraadt 226: else
1.5 pjanzen 227: t->tm_year = yearset + 1900 - TM_YEAR_BASE;
1.1 deraadt 228: }
229: /* FALLTHROUGH */
230: case 8: /* MMDDhhmm */
231: t->tm_mon = ATOI2(arg);
232: --t->tm_mon; /* Convert from 01-12 to 00-11 */
233: t->tm_mday = ATOI2(arg);
234: t->tm_hour = ATOI2(arg);
235: t->tm_min = ATOI2(arg);
236: break;
237: default:
238: goto terr;
239: }
240:
241: t->tm_isdst = -1; /* Figure out DST. */
242: tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
243: if (tvp[0].tv_sec == -1)
244: terr: errx(1,
245: "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
246:
247: tvp[0].tv_usec = tvp[1].tv_usec = 0;
248: }
249:
250: void
251: stime_arg2(arg, year, tvp)
252: char *arg;
253: int year;
254: struct timeval *tvp;
255: {
256: struct tm *t;
257: time_t tmptime;
258: /* Start with the current time. */
259: tmptime = tvp[0].tv_sec;
260: if ((t = localtime(&tmptime)) == NULL)
261: err(1, "localtime");
262:
1.4 pjanzen 263: t->tm_mon = ATOI2(arg); /* MMDDhhmm[YY] */
1.1 deraadt 264: --t->tm_mon; /* Convert from 01-12 to 00-11 */
265: t->tm_mday = ATOI2(arg);
266: t->tm_hour = ATOI2(arg);
267: t->tm_min = ATOI2(arg);
1.4 pjanzen 268: if (year) {
1.5 pjanzen 269: year = ATOI2(arg);
270: if (year < 69)
271: t->tm_year = year + 2000 - TM_YEAR_BASE;
272: else
273: t->tm_year = year + 1900 - TM_YEAR_BASE;
1.4 pjanzen 274: }
1.5 pjanzen 275: t->tm_sec = 0;
1.1 deraadt 276:
277: t->tm_isdst = -1; /* Figure out DST. */
278: tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
279: if (tvp[0].tv_sec == -1)
280: errx(1,
1.4 pjanzen 281: "out of range or illegal time specification: MMDDhhmm[YY]");
1.1 deraadt 282:
283: tvp[0].tv_usec = tvp[1].tv_usec = 0;
284: }
285:
286: void
287: stime_file(fname, tvp)
288: char *fname;
289: struct timeval *tvp;
290: {
291: struct stat sb;
292:
293: if (stat(fname, &sb))
294: err(1, "%s", fname);
295: TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec);
296: TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec);
297: }
298:
299: int
300: rw(fname, sbp, force)
301: char *fname;
302: struct stat *sbp;
303: int force;
304: {
305: int fd, needed_chmod, rval;
306: u_char byte;
307:
308: /* Try regular files and directories. */
309: if (!S_ISREG(sbp->st_mode) && !S_ISDIR(sbp->st_mode)) {
310: warnx("%s: %s", fname, strerror(EFTYPE));
311: return (1);
312: }
313:
314: needed_chmod = rval = 0;
315: if ((fd = open(fname, O_RDWR, 0)) == -1) {
316: if (!force || chmod(fname, DEFFILEMODE))
317: goto err;
318: if ((fd = open(fname, O_RDWR, 0)) == -1)
319: goto err;
320: needed_chmod = 1;
321: }
322:
323: if (sbp->st_size != 0) {
324: if (read(fd, &byte, sizeof(byte)) != sizeof(byte))
325: goto err;
326: if (lseek(fd, (off_t)0, SEEK_SET) == -1)
327: goto err;
328: if (write(fd, &byte, sizeof(byte)) != sizeof(byte))
329: goto err;
330: } else {
331: if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) {
332: err: rval = 1;
333: warn("%s", fname);
334: } else if (ftruncate(fd, (off_t)0)) {
335: rval = 1;
336: warn("%s: file modified", fname);
337: }
338: }
339:
340: if (close(fd) && rval != 1) {
341: rval = 1;
342: warn("%s", fname);
343: }
344: if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) {
345: rval = 1;
346: warn("%s: permissions modified", fname);
347: }
348: return (rval);
349: }
350:
351: __dead void
352: usage()
353: {
354: (void)fprintf(stderr,
355: "usage: touch [-acfm] [-r file] [-t time] file ...\n");
356: exit(1);
357: }