Annotation of src/usr.bin/touch/touch.c, Revision 1.14
1.14 ! henning 1: /* $OpenBSD: touch.c,v 1.13 2006/03/07 11:49:40 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: #include <sys/types.h>
34: #include <sys/stat.h>
35: #include <sys/time.h>
36:
37: #include <err.h>
38: #include <errno.h>
39: #include <fcntl.h>
40: #include <stdio.h>
41: #include <stdlib.h>
42: #include <string.h>
43: #include <locale.h>
44: #include <time.h>
1.5 pjanzen 45: #include <tzfile.h>
1.1 deraadt 46: #include <unistd.h>
47:
1.13 henning 48: void stime_arg1(char *, struct timeval *);
49: void stime_arg2(char *, int, struct timeval *);
50: void stime_file(char *, struct timeval *);
51: __dead void usage(void);
1.1 deraadt 52:
53: int
1.10 deraadt 54: main(int argc, char *argv[])
1.1 deraadt 55: {
1.14 ! henning 56: struct stat sb;
! 57: struct timeval tv[2];
! 58: int aflag, cflag, mflag, ch, fd, len, rval, timeset;
! 59: char *p;
1.1 deraadt 60:
1.13 henning 61: (void)setlocale(LC_ALL, "");
1.1 deraadt 62:
1.11 otto 63: aflag = cflag = mflag = timeset = 0;
1.1 deraadt 64: if (gettimeofday(&tv[0], NULL))
65: err(1, "gettimeofday");
66:
1.3 millert 67: while ((ch = getopt(argc, argv, "acfmr:t:")) != -1)
1.12 deraadt 68: switch (ch) {
1.1 deraadt 69: case 'a':
70: aflag = 1;
71: break;
72: case 'c':
73: cflag = 1;
74: break;
75: case 'f':
76: break;
77: case 'm':
78: mflag = 1;
79: break;
80: case 'r':
81: timeset = 1;
82: stime_file(optarg, tv);
83: break;
84: case 't':
85: timeset = 1;
86: stime_arg1(optarg, tv);
87: break;
88: default:
89: usage();
90: }
91: argc -= optind;
92: argv += optind;
93:
94: /* Default is both -a and -m. */
95: if (aflag == 0 && mflag == 0)
96: aflag = mflag = 1;
97:
98: /*
99: * If no -r or -t flag, at least two operands, the first of which
100: * is an 8 or 10 digit number, use the obsolete time specification.
101: */
102: if (!timeset && argc > 1) {
103: (void)strtol(argv[0], &p, 10);
104: len = p - argv[0];
105: if (*p == '\0' && (len == 8 || len == 10)) {
106: timeset = 1;
107: stime_arg2(*argv++, len == 10, tv);
108: }
109: }
110:
111: /* Otherwise use the current time of day. */
112: if (!timeset)
113: tv[1] = tv[0];
114:
115: if (*argv == NULL)
116: usage();
117:
118: for (rval = 0; *argv; ++argv) {
119: /* See if the file exists. */
1.4 pjanzen 120: if (stat(*argv, &sb)) {
1.1 deraadt 121: if (!cflag) {
122: /* Create the file. */
123: fd = open(*argv,
124: O_WRONLY | O_CREAT, DEFFILEMODE);
125: if (fd == -1 || fstat(fd, &sb) || close(fd)) {
126: rval = 1;
127: warn("%s", *argv);
128: continue;
129: }
130:
131: /* If using the current time, we're done. */
132: if (!timeset)
133: continue;
134: } else
135: continue;
1.4 pjanzen 136: }
1.1 deraadt 137:
138: if (!aflag)
139: TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec);
140: if (!mflag)
141: TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec);
142:
143: /* Try utimes(2). */
144: if (!utimes(*argv, tv))
145: continue;
146:
147: /* If the user specified a time, nothing else we can do. */
148: if (timeset) {
149: rval = 1;
150: warn("%s", *argv);
151: }
152:
153: /*
154: * System V and POSIX 1003.1 require that a NULL argument
155: * set the access/modification times to the current time.
156: * The permission checks are different, too, in that the
157: * ability to write the file is sufficient. Take a shot.
158: */
159: if (!utimes(*argv, NULL))
160: continue;
161:
1.11 otto 162: rval = 1;
163: warn("%s", *argv);
1.1 deraadt 164: }
165: exit(rval);
166: }
167:
1.6 pjanzen 168: #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
1.1 deraadt 169:
170: void
1.10 deraadt 171: stime_arg1(char *arg, struct timeval *tvp)
1.1 deraadt 172: {
1.13 henning 173: struct tm *t;
174: time_t tmptime;
175: int yearset;
176: char *p;
1.1 deraadt 177: /* Start with the current time. */
178: tmptime = tvp[0].tv_sec;
179: if ((t = localtime(&tmptime)) == NULL)
180: err(1, "localtime");
181: /* [[CC]YY]MMDDhhmm[.SS] */
182: if ((p = strchr(arg, '.')) == NULL)
183: t->tm_sec = 0; /* Seconds defaults to 0. */
184: else {
185: if (strlen(p + 1) != 2)
186: goto terr;
187: *p++ = '\0';
188: t->tm_sec = ATOI2(p);
189: }
1.12 deraadt 190:
1.1 deraadt 191: yearset = 0;
1.12 deraadt 192: switch (strlen(arg)) {
1.1 deraadt 193: case 12: /* CCYYMMDDhhmm */
1.6 pjanzen 194: t->tm_year = ATOI2(arg) * 100 - TM_YEAR_BASE;
1.1 deraadt 195: yearset = 1;
1.8 henning 196: /* FALLTHROUGH */
1.1 deraadt 197: case 10: /* YYMMDDhhmm */
198: if (yearset) {
199: yearset = ATOI2(arg);
200: t->tm_year += yearset;
201: } else {
202: yearset = ATOI2(arg);
203: if (yearset < 69)
1.5 pjanzen 204: t->tm_year = yearset + 2000 - TM_YEAR_BASE;
1.1 deraadt 205: else
1.5 pjanzen 206: t->tm_year = yearset + 1900 - TM_YEAR_BASE;
1.1 deraadt 207: }
208: /* FALLTHROUGH */
209: case 8: /* MMDDhhmm */
210: t->tm_mon = ATOI2(arg);
211: --t->tm_mon; /* Convert from 01-12 to 00-11 */
212: t->tm_mday = ATOI2(arg);
213: t->tm_hour = ATOI2(arg);
214: t->tm_min = ATOI2(arg);
215: break;
216: default:
217: goto terr;
218: }
219:
220: t->tm_isdst = -1; /* Figure out DST. */
221: tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
222: if (tvp[0].tv_sec == -1)
223: terr: errx(1,
224: "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
225:
226: tvp[0].tv_usec = tvp[1].tv_usec = 0;
227: }
228:
229: void
1.10 deraadt 230: stime_arg2(char *arg, int year, struct timeval *tvp)
1.1 deraadt 231: {
1.13 henning 232: struct tm *t;
233: time_t tmptime;
1.1 deraadt 234: /* Start with the current time. */
235: tmptime = tvp[0].tv_sec;
236: if ((t = localtime(&tmptime)) == NULL)
237: err(1, "localtime");
238:
1.4 pjanzen 239: t->tm_mon = ATOI2(arg); /* MMDDhhmm[YY] */
1.1 deraadt 240: --t->tm_mon; /* Convert from 01-12 to 00-11 */
241: t->tm_mday = ATOI2(arg);
242: t->tm_hour = ATOI2(arg);
243: t->tm_min = ATOI2(arg);
1.4 pjanzen 244: if (year) {
1.5 pjanzen 245: year = ATOI2(arg);
246: if (year < 69)
247: t->tm_year = year + 2000 - TM_YEAR_BASE;
248: else
249: t->tm_year = year + 1900 - TM_YEAR_BASE;
1.4 pjanzen 250: }
1.5 pjanzen 251: t->tm_sec = 0;
1.1 deraadt 252:
253: t->tm_isdst = -1; /* Figure out DST. */
254: tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
255: if (tvp[0].tv_sec == -1)
256: errx(1,
1.4 pjanzen 257: "out of range or illegal time specification: MMDDhhmm[YY]");
1.1 deraadt 258:
259: tvp[0].tv_usec = tvp[1].tv_usec = 0;
260: }
261:
262: void
1.10 deraadt 263: stime_file(char *fname, struct timeval *tvp)
1.1 deraadt 264: {
1.13 henning 265: struct stat sb;
1.1 deraadt 266:
267: if (stat(fname, &sb))
268: err(1, "%s", fname);
269: TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec);
270: TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec);
271: }
272:
273: __dead void
1.10 deraadt 274: usage(void)
1.1 deraadt 275: {
1.13 henning 276: extern char *__progname;
277:
1.1 deraadt 278: (void)fprintf(stderr,
1.13 henning 279: "usage: %s [-acm] [-r file] [-t time] file ...\n", __progname);
1.1 deraadt 280: exit(1);
281: }
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