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1.6 ! pjanzen 1: /* $OpenBSD: touch.c,v 1.5 2000/09/20 22:25:26 pjanzen 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.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char copyright[] =
39: "@(#) Copyright (c) 1993\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)touch.c 8.2 (Berkeley) 4/28/95";
46: #endif
1.6 ! pjanzen 47: static char rcsid[] = "$OpenBSD: touch.c,v 1.5 2000/09/20 22:25:26 pjanzen Exp $";
1.1 deraadt 48: #endif /* not lint */
49:
50: #include <sys/types.h>
51: #include <sys/stat.h>
52: #include <sys/time.h>
53:
54: #include <err.h>
55: #include <errno.h>
56: #include <fcntl.h>
57: #include <stdio.h>
58: #include <stdlib.h>
59: #include <string.h>
60: #include <locale.h>
61: #include <time.h>
1.5 pjanzen 62: #include <tzfile.h>
1.1 deraadt 63: #include <unistd.h>
64:
65: int rw __P((char *, struct stat *, int));
66: void stime_arg1 __P((char *, struct timeval *));
67: void stime_arg2 __P((char *, int, struct timeval *));
68: void stime_file __P((char *, struct timeval *));
69: void usage __P((void));
70:
71: int
72: main(argc, argv)
73: int argc;
74: char *argv[];
75: {
76: struct stat sb;
77: struct timeval tv[2];
78: int aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset;
79: char *p;
80:
81: setlocale(LC_ALL, "");
82:
83: aflag = cflag = fflag = mflag = timeset = 0;
84: if (gettimeofday(&tv[0], NULL))
85: err(1, "gettimeofday");
86:
1.3 millert 87: while ((ch = getopt(argc, argv, "acfmr:t:")) != -1)
1.1 deraadt 88: switch(ch) {
89: case 'a':
90: aflag = 1;
91: break;
92: case 'c':
93: cflag = 1;
94: break;
95: case 'f':
96: fflag = 1;
97: break;
98: case 'm':
99: mflag = 1;
100: break;
101: case 'r':
102: timeset = 1;
103: stime_file(optarg, tv);
104: break;
105: case 't':
106: timeset = 1;
107: stime_arg1(optarg, tv);
108: break;
109: case '?':
110: default:
111: usage();
112: }
113: argc -= optind;
114: argv += optind;
115:
116: /* Default is both -a and -m. */
117: if (aflag == 0 && mflag == 0)
118: aflag = mflag = 1;
119:
120: /*
121: * If no -r or -t flag, at least two operands, the first of which
122: * is an 8 or 10 digit number, use the obsolete time specification.
123: */
124: if (!timeset && argc > 1) {
125: (void)strtol(argv[0], &p, 10);
126: len = p - argv[0];
127: if (*p == '\0' && (len == 8 || len == 10)) {
128: timeset = 1;
129: stime_arg2(*argv++, len == 10, tv);
130: }
131: }
132:
133: /* Otherwise use the current time of day. */
134: if (!timeset)
135: tv[1] = tv[0];
136:
137: if (*argv == NULL)
138: usage();
139:
140: for (rval = 0; *argv; ++argv) {
141: /* See if the file exists. */
1.4 pjanzen 142: if (stat(*argv, &sb)) {
1.1 deraadt 143: if (!cflag) {
144: /* Create the file. */
145: fd = open(*argv,
146: O_WRONLY | O_CREAT, DEFFILEMODE);
147: if (fd == -1 || fstat(fd, &sb) || close(fd)) {
148: rval = 1;
149: warn("%s", *argv);
150: continue;
151: }
152:
153: /* If using the current time, we're done. */
154: if (!timeset)
155: continue;
156: } else
157: continue;
1.4 pjanzen 158: }
1.1 deraadt 159:
160: if (!aflag)
161: TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec);
162: if (!mflag)
163: TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec);
164:
165: /* Try utimes(2). */
166: if (!utimes(*argv, tv))
167: continue;
168:
169: /* If the user specified a time, nothing else we can do. */
170: if (timeset) {
171: rval = 1;
172: warn("%s", *argv);
173: }
174:
175: /*
176: * System V and POSIX 1003.1 require that a NULL argument
177: * set the access/modification times to the current time.
178: * The permission checks are different, too, in that the
179: * ability to write the file is sufficient. Take a shot.
180: */
181: if (!utimes(*argv, NULL))
182: continue;
183:
184: /* Try reading/writing. */
185: if (rw(*argv, &sb, fflag))
186: rval = 1;
187: }
188: exit(rval);
189: }
190:
1.6 ! pjanzen 191: #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
1.1 deraadt 192:
193: void
194: stime_arg1(arg, tvp)
195: char *arg;
196: struct timeval *tvp;
197: {
198: struct tm *t;
199: time_t tmptime;
200: int yearset;
201: char *p;
202: /* Start with the current time. */
203: tmptime = tvp[0].tv_sec;
204: if ((t = localtime(&tmptime)) == NULL)
205: err(1, "localtime");
206: /* [[CC]YY]MMDDhhmm[.SS] */
207: if ((p = strchr(arg, '.')) == NULL)
208: t->tm_sec = 0; /* Seconds defaults to 0. */
209: else {
210: if (strlen(p + 1) != 2)
211: goto terr;
212: *p++ = '\0';
213: t->tm_sec = ATOI2(p);
214: }
215:
216: yearset = 0;
217: switch(strlen(arg)) {
218: case 12: /* CCYYMMDDhhmm */
1.6 ! pjanzen 219: t->tm_year = ATOI2(arg) * 100 - TM_YEAR_BASE;
1.1 deraadt 220: yearset = 1;
221: /* FALLTHOUGH */
222: case 10: /* YYMMDDhhmm */
223: if (yearset) {
224: yearset = ATOI2(arg);
225: t->tm_year += yearset;
226: } else {
227: yearset = ATOI2(arg);
228: if (yearset < 69)
1.5 pjanzen 229: t->tm_year = yearset + 2000 - TM_YEAR_BASE;
1.1 deraadt 230: else
1.5 pjanzen 231: t->tm_year = yearset + 1900 - TM_YEAR_BASE;
1.1 deraadt 232: }
233: /* FALLTHROUGH */
234: case 8: /* MMDDhhmm */
235: t->tm_mon = ATOI2(arg);
236: --t->tm_mon; /* Convert from 01-12 to 00-11 */
237: t->tm_mday = ATOI2(arg);
238: t->tm_hour = ATOI2(arg);
239: t->tm_min = ATOI2(arg);
240: break;
241: default:
242: goto terr;
243: }
244:
245: t->tm_isdst = -1; /* Figure out DST. */
246: tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
247: if (tvp[0].tv_sec == -1)
248: terr: errx(1,
249: "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
250:
251: tvp[0].tv_usec = tvp[1].tv_usec = 0;
252: }
253:
254: void
255: stime_arg2(arg, year, tvp)
256: char *arg;
257: int year;
258: struct timeval *tvp;
259: {
260: struct tm *t;
261: time_t tmptime;
262: /* Start with the current time. */
263: tmptime = tvp[0].tv_sec;
264: if ((t = localtime(&tmptime)) == NULL)
265: err(1, "localtime");
266:
1.4 pjanzen 267: t->tm_mon = ATOI2(arg); /* MMDDhhmm[YY] */
1.1 deraadt 268: --t->tm_mon; /* Convert from 01-12 to 00-11 */
269: t->tm_mday = ATOI2(arg);
270: t->tm_hour = ATOI2(arg);
271: t->tm_min = ATOI2(arg);
1.4 pjanzen 272: if (year) {
1.5 pjanzen 273: year = ATOI2(arg);
274: if (year < 69)
275: t->tm_year = year + 2000 - TM_YEAR_BASE;
276: else
277: t->tm_year = year + 1900 - TM_YEAR_BASE;
1.4 pjanzen 278: }
1.5 pjanzen 279: t->tm_sec = 0;
1.1 deraadt 280:
281: t->tm_isdst = -1; /* Figure out DST. */
282: tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
283: if (tvp[0].tv_sec == -1)
284: errx(1,
1.4 pjanzen 285: "out of range or illegal time specification: MMDDhhmm[YY]");
1.1 deraadt 286:
287: tvp[0].tv_usec = tvp[1].tv_usec = 0;
288: }
289:
290: void
291: stime_file(fname, tvp)
292: char *fname;
293: struct timeval *tvp;
294: {
295: struct stat sb;
296:
297: if (stat(fname, &sb))
298: err(1, "%s", fname);
299: TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec);
300: TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec);
301: }
302:
303: int
304: rw(fname, sbp, force)
305: char *fname;
306: struct stat *sbp;
307: int force;
308: {
309: int fd, needed_chmod, rval;
310: u_char byte;
311:
312: /* Try regular files and directories. */
313: if (!S_ISREG(sbp->st_mode) && !S_ISDIR(sbp->st_mode)) {
314: warnx("%s: %s", fname, strerror(EFTYPE));
315: return (1);
316: }
317:
318: needed_chmod = rval = 0;
319: if ((fd = open(fname, O_RDWR, 0)) == -1) {
320: if (!force || chmod(fname, DEFFILEMODE))
321: goto err;
322: if ((fd = open(fname, O_RDWR, 0)) == -1)
323: goto err;
324: needed_chmod = 1;
325: }
326:
327: if (sbp->st_size != 0) {
328: if (read(fd, &byte, sizeof(byte)) != sizeof(byte))
329: goto err;
330: if (lseek(fd, (off_t)0, SEEK_SET) == -1)
331: goto err;
332: if (write(fd, &byte, sizeof(byte)) != sizeof(byte))
333: goto err;
334: } else {
335: if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) {
336: err: rval = 1;
337: warn("%s", fname);
338: } else if (ftruncate(fd, (off_t)0)) {
339: rval = 1;
340: warn("%s: file modified", fname);
341: }
342: }
343:
344: if (close(fd) && rval != 1) {
345: rval = 1;
346: warn("%s", fname);
347: }
348: if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) {
349: rval = 1;
350: warn("%s: permissions modified", fname);
351: }
352: return (rval);
353: }
354:
355: __dead void
356: usage()
357: {
358: (void)fprintf(stderr,
359: "usage: touch [-acfm] [-r file] [-t time] file ...\n");
360: exit(1);
361: }