1 /* $OpenBSD: touch.c,v 1.12 2005/04/20 19:16:34 deraadt 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/cdefs.h>
34 __COPYRIGHT("@(#) Copyright (c) 1993\n\
35 The Regents of the University of California. All rights reserved.\n");
36 __SCCSID("@(#)touch.c 8.2 (Berkeley) 4/28/95");
37 __RCSID("$MirOS: src/usr.bin/touch/touch.c,v 1.2 2007/07/05 23:09:43 tg Exp $");
38
39 #include <sys/types.h>
40 #include <sys/stat.h>
41 #include <sys/time.h>
42
43 #include <err.h>
44 #include <errno.h>
45 #include <fcntl.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <locale.h>
50 #include <time.h>
51 #include <tzfile.h>
52 #include <unistd.h>
53
54 void stime_arg1(char *, struct timeval *);
55 void stime_arg2(char *, int, struct timeval *);
56 void stime_file(char *, struct timeval *);
57 void usage(void);
58
59 int
main(int argc,char * argv[])60 main(int argc, char *argv[])
61 {
62 struct stat sb;
63 struct timeval tv[2];
64 int aflag, cflag, mflag, ch, fd, len, rval, timeset;
65 char *p;
66
67 #ifndef __MirBSD__
68 setlocale(LC_ALL, "");
69 #endif
70
71 aflag = cflag = mflag = timeset = 0;
72 if (gettimeofday(&tv[0], NULL))
73 err(1, "gettimeofday");
74
75 while ((ch = getopt(argc, argv, "acfmr:t:")) != -1)
76 switch (ch) {
77 case 'a':
78 aflag = 1;
79 break;
80 case 'c':
81 cflag = 1;
82 break;
83 case 'f':
84 break;
85 case 'm':
86 mflag = 1;
87 break;
88 case 'r':
89 timeset = 1;
90 stime_file(optarg, tv);
91 break;
92 case 't':
93 timeset = 1;
94 stime_arg1(optarg, tv);
95 break;
96 default:
97 usage();
98 }
99 argc -= optind;
100 argv += optind;
101
102 /* Default is both -a and -m. */
103 if (aflag == 0 && mflag == 0)
104 aflag = mflag = 1;
105
106 /*
107 * If no -r or -t flag, at least two operands, the first of which
108 * is an 8 or 10 digit number, use the obsolete time specification.
109 */
110 if (!timeset && argc > 1) {
111 (void)strtol(argv[0], &p, 10);
112 len = p - argv[0];
113 if (*p == '\0' && (len == 8 || len == 10)) {
114 timeset = 1;
115 stime_arg2(*argv++, len == 10, tv);
116 }
117 }
118
119 /* Otherwise use the current time of day. */
120 if (!timeset)
121 tv[1] = tv[0];
122
123 if (*argv == NULL)
124 usage();
125
126 for (rval = 0; *argv; ++argv) {
127 /* See if the file exists. */
128 if (stat(*argv, &sb)) {
129 if (!cflag) {
130 /* Create the file. */
131 fd = open(*argv,
132 O_WRONLY | O_CREAT, DEFFILEMODE);
133 if (fd == -1 || fstat(fd, &sb) || close(fd)) {
134 rval = 1;
135 warn("%s", *argv);
136 continue;
137 }
138
139 /* If using the current time, we're done. */
140 if (!timeset)
141 continue;
142 } else
143 continue;
144 }
145
146 if (!aflag)
147 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec);
148 if (!mflag)
149 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec);
150
151 /* Try utimes(2). */
152 if (!utimes(*argv, tv))
153 continue;
154
155 /* If the user specified a time, nothing else we can do. */
156 if (timeset) {
157 rval = 1;
158 warn("%s", *argv);
159 }
160
161 /*
162 * System V and POSIX 1003.1 require that a NULL argument
163 * set the access/modification times to the current time.
164 * The permission checks are different, too, in that the
165 * ability to write the file is sufficient. Take a shot.
166 */
167 if (!utimes(*argv, NULL))
168 continue;
169
170 rval = 1;
171 warn("%s", *argv);
172 }
173 exit(rval);
174 }
175
176 #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
177
178 void
stime_arg1(char * arg,struct timeval * tvp)179 stime_arg1(char *arg, struct timeval *tvp)
180 {
181 struct tm *t;
182 time_t tmptime;
183 int yearset;
184 char *p;
185 /* Start with the current time. */
186 tmptime = tvp[0].tv_sec;
187 if ((t = localtime(&tmptime)) == NULL)
188 err(1, "localtime");
189 /* [[CC]YY]MMDDhhmm[.SS] */
190 if ((p = strchr(arg, '.')) == NULL)
191 t->tm_sec = 0; /* Seconds defaults to 0. */
192 else {
193 if (strlen(p + 1) != 2)
194 goto terr;
195 *p++ = '\0';
196 t->tm_sec = ATOI2(p);
197 }
198
199 yearset = 0;
200 switch (strlen(arg)) {
201 case 12: /* CCYYMMDDhhmm */
202 t->tm_year = ATOI2(arg) * 100 - TM_YEAR_BASE;
203 yearset = 1;
204 /* FALLTHROUGH */
205 case 10: /* YYMMDDhhmm */
206 if (yearset) {
207 yearset = ATOI2(arg);
208 t->tm_year += yearset;
209 } else {
210 yearset = ATOI2(arg);
211 if (yearset < 69)
212 t->tm_year = yearset + 2000 - TM_YEAR_BASE;
213 else
214 t->tm_year = yearset + 1900 - TM_YEAR_BASE;
215 }
216 /* FALLTHROUGH */
217 case 8: /* MMDDhhmm */
218 t->tm_mon = ATOI2(arg);
219 --t->tm_mon; /* Convert from 01-12 to 00-11 */
220 t->tm_mday = ATOI2(arg);
221 t->tm_hour = ATOI2(arg);
222 t->tm_min = ATOI2(arg);
223 break;
224 default:
225 goto terr;
226 }
227
228 t->tm_isdst = -1; /* Figure out DST. */
229 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
230 if (tvp[0].tv_sec == -1)
231 terr: errx(1,
232 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
233
234 tvp[0].tv_usec = tvp[1].tv_usec = 0;
235 }
236
237 void
stime_arg2(char * arg,int year,struct timeval * tvp)238 stime_arg2(char *arg, int year, struct timeval *tvp)
239 {
240 struct tm *t;
241 time_t tmptime;
242 /* Start with the current time. */
243 tmptime = tvp[0].tv_sec;
244 if ((t = localtime(&tmptime)) == NULL)
245 err(1, "localtime");
246
247 t->tm_mon = ATOI2(arg); /* MMDDhhmm[YY] */
248 --t->tm_mon; /* Convert from 01-12 to 00-11 */
249 t->tm_mday = ATOI2(arg);
250 t->tm_hour = ATOI2(arg);
251 t->tm_min = ATOI2(arg);
252 if (year) {
253 year = ATOI2(arg);
254 if (year < 69)
255 t->tm_year = year + 2000 - TM_YEAR_BASE;
256 else
257 t->tm_year = year + 1900 - TM_YEAR_BASE;
258 }
259 t->tm_sec = 0;
260
261 t->tm_isdst = -1; /* Figure out DST. */
262 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
263 if (tvp[0].tv_sec == -1)
264 errx(1,
265 "out of range or illegal time specification: MMDDhhmm[YY]");
266
267 tvp[0].tv_usec = tvp[1].tv_usec = 0;
268 }
269
270 void
stime_file(char * fname,struct timeval * tvp)271 stime_file(char *fname, struct timeval *tvp)
272 {
273 struct stat sb;
274
275 if (stat(fname, &sb))
276 err(1, "%s", fname);
277 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec);
278 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec);
279 }
280
281 __dead void
usage(void)282 usage(void)
283 {
284 (void)fprintf(stderr,
285 "usage: touch [-acm] [-r file] [-t time] file ...\n");
286 exit(1);
287 }
288