1 /*
2  * Copyright (c) 1993 Regents of the University of California.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *	This product includes software developed by the University of
16  *	California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  *
33  * 7/20/97 - Ted Felix <tfelix@fred.net>
34  *           Ported to Win32 from bsd4.3-reno at wuarchive.
35  *           Biggest problems were err() routines, utines, and
36  *           gettimeofday().  All easily fixed.
37  */
38 
39 #ifndef lint
40 char copyright[] =
41 "@(#) Copyright (c) 1993 Regents of the University of California.\n\
42  All rights reserved.\n";
43 #endif /* not lint */
44 
45 #include <sys/types.h>
46 #include <sys/stat.h>
47 #include <time.h>
48 
49 //#ifdef __STDC__
50 //#error "__STDC__ defined"
51 //#endif
52 
53 #include <sys/utime.h>
54 #include <io.h>
55 #include <fcntl.h>
56 #include <getopt.h>
57 #include <various.h>
58 #define DEFFILEMODE S_IWRITE
59 
60 #include <err.h>
61 #include <errno.h>
62 #include <stdio.h>
63 #include <stdlib.h>
64 #include <string.h>
65 #include <time.h>
66 #include <unistd.h>
67 
68 char *__progname;		/* Program name, from crt0. */
69 
70 /* Prototypes */
71 int	rw __P((char *, struct stat *, int));
72 void	stime_arg1 __P((char *, time_t *));
73 void	stime_arg2 __P((char *, int, time_t *));
74 void	stime_file __P((char *, time_t *));
75 void	usage __P((void));
76 
77 int
78 main(int argc, char *argv[])
79 {
80 	struct stat sb;
81 	time_t tv[2];
82 	int aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset;
83 	char *p;
84 	struct utimbuf utb;
85 
86 	__progname = argv[0];
87 
88 	aflag = cflag = fflag = mflag = timeset = 0;
89 	time(&tv[0]);
90 
91 	while ((ch = getopt(argc, argv, "acfmr:t:")) != EOF)
92 		switch(ch) {
93 		case 'a':
94 			aflag = 1;
95 			break;
96 		case 'c':
97 			cflag = 1;
98 			break;
99 		case 'f':
100 			fflag = 1;
101 			break;
102 		case 'm':
103 			mflag = 1;
104 			break;
105 		case 'r':
106 			timeset = 1;
107 			stime_file(optarg, tv);
108 			break;
109 		case 't':
110 			timeset = 1;
111 			stime_arg1(optarg, tv);
112 			break;
113 		case '?':
114 		default:
115 			usage();
116 		}
117 	argc -= optind;
118 	argv += optind;
119 
120 	/* Default is both -a and -m. */
121 	if (aflag == 0 && mflag == 0)
122 		aflag = mflag = 1;
123 
124 	/*
125 	 * If no -r or -t flag, at least two operands, the first of which
126 	 * is an 8 or 10 digit number, use the obsolete time specification.
127 	 */
128 	if (!timeset && argc > 1) {
129 		(void)strtol(argv[0], &p, 10);
130 		len = p - argv[0];
131 		if (*p == '\0' && (len == 8 || len == 10)) {
132 			timeset = 1;
133 			stime_arg2(argv[0], len == 10, tv);
134 		}
135 	}
136 
137 	/* Otherwise use the current time of day. */
138 	if (!timeset)
139 		tv[1] = tv[0];
140 
141 	if (*argv == NULL)
142 		usage();
143 
144 	for (rval = 0; *argv; ++argv) {
145 		/* See if the file exists. */
146 		if (stat(*argv, &sb)) {
147 			if (!cflag) {
148 				/* Create the file. */
149 				fd = _open(*argv,
150 				    O_WRONLY | O_CREAT, DEFFILEMODE);
151 				if (fd == -1 || fstat(fd, &sb) || _close(fd)) {
152 					rval = 1;
153 					warn("%s", *argv);
154 					continue;
155 				}
156 
157 				/* If using the current time, we're done. */
158 				if (!timeset)
159 					continue;
160 			} else
161 				continue;
162 		}
163 
164 		if (!aflag)
165 			tv[0] = sb.st_atime;
166 		if (!mflag)
167 			tv[1] = sb.st_mtime;
168 
169 		/* Try utime. */
170 		utb.actime = tv[0];
171 		utb.modtime = tv[1];
172 		if (!utime(*argv, &utb))
173 			continue;
174 
175 		/* If the user specified a time, nothing else we can do. */
176 		if (timeset) {
177 			rval = 1;
178 			warn("%s", *argv);
179 		}
180 
181 		/*
182 		 * System V and POSIX 1003.1 require that a NULL argument
183 		 * set the access/modification times to the current time.
184 		 * The permission checks are different, too, in that the
185 		 * ability to write the file is sufficient.  Take a shot.
186 		 */
187 		 if (!utime(*argv, NULL))
188 			continue;
189 
190 		/* Try reading/writing. */
191 		if (rw(*argv, &sb, fflag))
192 			rval = 1;
193 	}
194 	return rval;
195 }
196 
197 #define	ATOI2(ar)	((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
198 
199 void
200 stime_arg1(char *arg, time_t *tvp)
201 {
202 	struct tm *t;
203 	int yearset;
204 	char *p;
205 					/* Start with the current time. */
206 	if ((t = localtime(&tvp[0])) == NULL)
207 		err(1, "localtime");
208 					/* [[CC]YY]MMDDhhmm[.SS] */
209 	if ((p = strchr(arg, '.')) == NULL)
210 		t->tm_sec = 0;		/* Seconds defaults to 0. */
211 	else {
212 		if (strlen(p + 1) != 2)
213 			goto terr;
214 		*p++ = '\0';
215 		t->tm_sec = ATOI2(p);
216 	}
217 
218 	yearset = 0;
219 	switch(strlen(arg)) {
220 	case 12:			/* CCYYMMDDhhmm */
221 		t->tm_year = ATOI2(arg);
222 		t->tm_year *= 1000;
223 		yearset = 1;
224 		/* FALLTHOUGH */
225 	case 10:			/* YYMMDDhhmm */
226 		if (yearset) {
227 			yearset = ATOI2(arg);
228 			t->tm_year += yearset;
229 		} else {
230 			yearset = ATOI2(arg);
231 			if (yearset < 69)
232 				t->tm_year = yearset + 2000;
233 			else
234 				t->tm_year = yearset + 1900;
235 		}
236 		t->tm_year -= 1900;	/* Convert to UNIX time. */
237 		/* FALLTHROUGH */
238 	case 8:				/* MMDDhhmm */
239 		t->tm_mon = ATOI2(arg);
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);
244 		break;
245 	default:
246 		goto terr;
247 	}
248 
249 	t->tm_isdst = -1;		/* Figure out DST. */
250 	tvp[0] = tvp[1] = mktime(t);
251 	if (tvp[0] == -1)
252 terr:		errx(1,
253 	"out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
254 }
255 
256 void
257 stime_arg2(char *arg, int year, time_t *tvp)
258 {
259 	struct tm *t;
260 					/* Start with the current time. */
261 	if ((t = localtime(&tvp[0])) == NULL)
262 		err(1, "localtime");
263 
264 	t->tm_mon = ATOI2(arg);		/* MMDDhhmm[yy] */
265 	--t->tm_mon;			/* Convert from 01-12 to 00-11 */
266 	t->tm_mday = ATOI2(arg);
267 	t->tm_hour = ATOI2(arg);
268 	t->tm_min = ATOI2(arg);
269 	if (year)
270 		t->tm_year = ATOI2(arg);
271 
272 	t->tm_isdst = -1;		/* Figure out DST. */
273 	tvp[0] = tvp[1] = mktime(t);
274 	if (tvp[0] == -1)
275 		errx(1,
276 	"out of range or illegal time specification: MMDDhhmm[yy]");
277 }
278 
279 void
280 stime_file(char *fname, time_t *tvp)
281 {
282 	struct stat sb;
283 
284 	if (stat(fname, &sb))
285 		err(1, "%s", fname);
286 	tvp[0] = sb.st_atime;
287 	tvp[1] = sb.st_mtime;
288 }
289 
290 int
291 rw(char *fname, struct stat *sbp, int force)
292 {
293 	int fd, needed_chmod, rval;
294 	u_char byte;
295 
296 	/* Try regular files and directories. */
297 	if (!S_ISREG(sbp->st_mode) && !S_ISDIR(sbp->st_mode)) {
298 		warnx("%s: %s", fname, strerror(0));
299 		return (1);
300 	}
301 
302 	needed_chmod = rval = 0;
303 	if ((fd = _open(fname, O_RDWR, 0)) == -1) {
304 		if (!force || _chmod(fname, DEFFILEMODE))
305 			goto err;
306 		if ((fd = _open(fname, O_RDWR, 0)) == -1)
307 			goto err;
308 		needed_chmod = 1;
309 	}
310 
311 	if (sbp->st_size != 0) {
312 		if (_read(fd, &byte, sizeof(byte)) != sizeof(byte))
313 			goto err;
314 		if (_lseek(fd, (off_t)0, SEEK_SET) == -1)
315 			goto err;
316 		if (_write(fd, &byte, sizeof(byte)) != sizeof(byte))
317 			goto err;
318 	} else {
319 		if (_write(fd, &byte, sizeof(byte)) != sizeof(byte)) {
320 err:			rval = 1;
321 			warn("%s", fname);
322 /*		} else if (ftruncate(fd, (off_t)0)) {*/
323 		} else if (_chsize(fd, (off_t)0)) {
324 			rval = 1;
325 			warn("%s: file modified", fname);
326 		}
327 	}
328 
329 	if (_close(fd) && rval != 1) {
330 		rval = 1;
331 		warn("%s", fname);
332 	}
333 	if (needed_chmod && _chmod(fname, sbp->st_mode) && rval != 1) {
334 		rval = 1;
335 		warn("%s: permissions modified", fname);
336 	}
337 	return (rval);
338 }
339 
340 /*__dead void*/
341 void
342 usage()
343 {
344 	(void)fprintf(stderr,
345 	    "usage: touch [-acfm] [-r file] [-t time] file ...\n");
346 	exit(1);
347 }
348