1 /* 2 * Copyright (c) 1993 3 * The Regents of the University of California. 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 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static const char sccsid[] = "@(#)touch.c 8.1 (Berkeley) 6/6/93"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/types.h> 49 #include <sys/stat.h> 50 #include <sys/time.h> 51 52 #include <err.h> 53 #include <errno.h> 54 #include <fcntl.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <time.h> 59 #include <unistd.h> 60 61 int main __P((int, char *[])); 62 int rw __P((char *, struct stat *, int)); 63 void stime_arg1 __P((char *, struct timeval *)); 64 void stime_arg2 __P((char *, int, struct timeval *)); 65 void stime_file __P((char *, struct timeval *)); 66 void usage __P((void)); 67 68 int 69 main(argc, argv) 70 int argc; 71 char *argv[]; 72 { 73 struct stat sb; 74 struct timeval tv[2]; 75 int aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset; 76 char *p; 77 78 aflag = cflag = fflag = mflag = timeset = 0; 79 if (gettimeofday(&tv[0], NULL)) 80 err(1, "gettimeofday"); 81 82 while ((ch = getopt(argc, argv, "acfmr:t:")) != -1) 83 switch(ch) { 84 case 'a': 85 aflag = 1; 86 break; 87 case 'c': 88 cflag = 1; 89 break; 90 case 'f': 91 fflag = 1; 92 break; 93 case 'm': 94 mflag = 1; 95 break; 96 case 'r': 97 timeset = 1; 98 stime_file(optarg, tv); 99 break; 100 case 't': 101 timeset = 1; 102 stime_arg1(optarg, tv); 103 break; 104 case '?': 105 default: 106 usage(); 107 } 108 argc -= optind; 109 argv += optind; 110 111 /* Default is both -a and -m. */ 112 if (aflag == 0 && mflag == 0) 113 aflag = mflag = 1; 114 115 /* 116 * If no -r or -t flag, at least two operands, the first of which 117 * is an 8 or 10 digit number, use the obsolete time specification. 118 */ 119 if (!timeset && argc > 1) { 120 (void)strtol(argv[0], &p, 10); 121 len = p - argv[0]; 122 if (*p == '\0' && (len == 8 || len == 10)) { 123 timeset = 1; 124 stime_arg2(*argv++, len == 10, tv); 125 } 126 } 127 128 /* Otherwise use the current time of day. */ 129 if (!timeset) 130 tv[1] = tv[0]; 131 132 if (*argv == NULL) 133 usage(); 134 135 for (rval = 0; *argv; ++argv) { 136 /* See if the file exists. */ 137 if (stat(*argv, &sb)) { 138 if (!cflag) { 139 /* Create the file. */ 140 fd = open(*argv, 141 O_WRONLY | O_CREAT, DEFFILEMODE); 142 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 143 rval = 1; 144 warn("%s", *argv); 145 continue; 146 } 147 148 /* If using the current time, we're done. */ 149 if (!timeset) 150 continue; 151 } else 152 continue; 153 } 154 155 if (!aflag) 156 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec); 157 if (!mflag) 158 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec); 159 160 /* Try utimes(2). */ 161 if (!utimes(*argv, tv)) 162 continue; 163 164 /* If the user specified a time, nothing else we can do. */ 165 if (timeset) { 166 rval = 1; 167 warn("%s", *argv); 168 } 169 170 /* 171 * System V and POSIX 1003.1 require that a NULL argument 172 * set the access/modification times to the current time. 173 * The permission checks are different, too, in that the 174 * ability to write the file is sufficient. Take a shot. 175 */ 176 if (!utimes(*argv, NULL)) 177 continue; 178 179 /* Try reading/writing. */ 180 if (rw(*argv, &sb, fflag)) 181 rval = 1; 182 } 183 exit(rval); 184 } 185 186 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 187 188 void 189 stime_arg1(arg, tvp) 190 char *arg; 191 struct timeval *tvp; 192 { 193 time_t now; 194 struct tm *t; 195 int yearset; 196 char *p; 197 /* Start with the current time. */ 198 now = tvp[0].tv_sec; 199 if ((t = localtime(&now)) == NULL) 200 err(1, "localtime"); 201 /* [[CC]YY]MMDDhhmm[.SS] */ 202 if ((p = strchr(arg, '.')) == NULL) 203 t->tm_sec = 0; /* Seconds defaults to 0. */ 204 else { 205 if (strlen(p + 1) != 2) 206 goto terr; 207 *p++ = '\0'; 208 t->tm_sec = ATOI2(p); 209 } 210 211 yearset = 0; 212 switch(strlen(arg)) { 213 case 12: /* CCYYMMDDhhmm */ 214 t->tm_year = ATOI2(arg); 215 t->tm_year *= 100; 216 yearset = 1; 217 /* FALLTHOUGH */ 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) 225 t->tm_year = yearset + 2000; 226 else 227 t->tm_year = yearset + 1900; 228 } 229 t->tm_year -= 1900; /* Convert to UNIX time. */ 230 /* FALLTHROUGH */ 231 case 8: /* MMDDhhmm */ 232 t->tm_mon = ATOI2(arg); 233 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 234 t->tm_mday = ATOI2(arg); 235 t->tm_hour = ATOI2(arg); 236 t->tm_min = ATOI2(arg); 237 break; 238 default: 239 goto terr; 240 } 241 242 t->tm_isdst = -1; /* Figure out DST. */ 243 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 244 if (tvp[0].tv_sec == -1) 245 terr: errx(1, 246 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 247 248 tvp[0].tv_usec = tvp[1].tv_usec = 0; 249 } 250 251 void 252 stime_arg2(arg, year, tvp) 253 char *arg; 254 int year; 255 struct timeval *tvp; 256 { 257 time_t now; 258 struct tm *t; 259 /* Start with the current time. */ 260 now = tvp[0].tv_sec; 261 if ((t = localtime(&now)) == 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 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 272 t->tm_year += 100; 273 } 274 275 t->tm_isdst = -1; /* Figure out DST. */ 276 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 277 if (tvp[0].tv_sec == -1) 278 errx(1, 279 "out of range or illegal time specification: MMDDhhmm[yy]"); 280 281 tvp[0].tv_usec = tvp[1].tv_usec = 0; 282 } 283 284 void 285 stime_file(fname, tvp) 286 char *fname; 287 struct timeval *tvp; 288 { 289 struct stat sb; 290 291 if (stat(fname, &sb)) 292 err(1, "%s", fname); 293 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec); 294 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec); 295 } 296 297 int 298 rw(fname, sbp, force) 299 char *fname; 300 struct stat *sbp; 301 int force; 302 { 303 int fd, needed_chmod, rval; 304 u_char byte; 305 306 /* Try regular files and directories. */ 307 if (!S_ISREG(sbp->st_mode) && !S_ISDIR(sbp->st_mode)) { 308 warnx("%s: %s", fname, strerror(EFTYPE)); 309 return (1); 310 } 311 312 needed_chmod = rval = 0; 313 if ((fd = open(fname, O_RDWR, 0)) == -1) { 314 if (!force || chmod(fname, DEFFILEMODE)) 315 goto err; 316 if ((fd = open(fname, O_RDWR, 0)) == -1) 317 goto err; 318 needed_chmod = 1; 319 } 320 321 if (sbp->st_size != 0) { 322 if (read(fd, &byte, sizeof(byte)) != sizeof(byte)) 323 goto err; 324 if (lseek(fd, (off_t)0, SEEK_SET) == -1) 325 goto err; 326 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) 327 goto err; 328 } else { 329 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) { 330 err: rval = 1; 331 warn("%s", fname); 332 } else if (ftruncate(fd, (off_t)0)) { 333 rval = 1; 334 warn("%s: file modified", fname); 335 } 336 } 337 338 if (close(fd) && rval != 1) { 339 rval = 1; 340 warn("%s", fname); 341 } 342 if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) { 343 rval = 1; 344 warn("%s: permissions modified", fname); 345 } 346 return (rval); 347 } 348 349 void 350 usage() 351 { 352 (void)fprintf(stderr, "usage: touch [-acfm] [-r file] [-t [[CC]YY]MMDDhhmm[.SS]] file ...\n"); 353 exit(1); 354 } 355