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 #include <sys/cdefs.h> 35 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef lint 39 static const char copyright[] = 40 "@(#) Copyright (c) 1993\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42 #endif 43 44 #ifndef lint 45 static const char sccsid[] = "@(#)touch.c 8.1 (Berkeley) 6/6/93"; 46 #endif 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 <libgen.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <time.h> 60 #include <unistd.h> 61 62 int rw(char *, struct stat *, int); 63 void stime_arg1(char *, struct timeval *); 64 void stime_arg2(char *, int, struct timeval *); 65 void stime_file(char *, struct timeval *); 66 int timeoffset(char *); 67 void usage(char *); 68 69 int 70 main(int argc, char *argv[]) 71 { 72 struct stat sb; 73 struct timeval tv[2]; 74 int (*stat_f)(const char *, struct stat *); 75 int (*utimes_f)(const char *, const struct timeval *); 76 int Aflag, aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset; 77 char *p; 78 char *myname; 79 80 myname = basename(argv[0]); 81 Aflag = aflag = cflag = fflag = mflag = timeset = 0; 82 stat_f = stat; 83 utimes_f = utimes; 84 if (gettimeofday(&tv[0], NULL)) 85 err(1, "gettimeofday"); 86 87 while ((ch = getopt(argc, argv, "A:acfhmr:t:")) != -1) 88 switch(ch) { 89 case 'A': 90 Aflag = timeoffset(optarg); 91 break; 92 case 'a': 93 aflag = 1; 94 break; 95 case 'c': 96 cflag = 1; 97 break; 98 case 'f': 99 fflag = 1; 100 break; 101 case 'h': 102 cflag = 1; 103 stat_f = lstat; 104 utimes_f = lutimes; 105 break; 106 case 'm': 107 mflag = 1; 108 break; 109 case 'r': 110 timeset = 1; 111 stime_file(optarg, tv); 112 break; 113 case 't': 114 timeset = 1; 115 stime_arg1(optarg, tv); 116 break; 117 case '?': 118 default: 119 usage(myname); 120 } 121 argc -= optind; 122 argv += optind; 123 124 if (aflag == 0 && mflag == 0) 125 aflag = mflag = 1; 126 127 if (timeset) { 128 if (Aflag) { 129 /* 130 * We're setting the time to an offset from a specified 131 * time. God knows why, but it means that we can set 132 * that time once and for all here. 133 */ 134 if (aflag) 135 tv[0].tv_sec += Aflag; 136 if (mflag) 137 tv[1].tv_sec += Aflag; 138 Aflag = 0; /* done our job */ 139 } 140 } else { 141 /* 142 * If no -r or -t flag, at least two operands, the first of 143 * which is an 8 or 10 digit number, use the obsolete time 144 * specification, otherwise use the current time. 145 */ 146 if (argc > 1) { 147 strtol(argv[0], &p, 10); 148 len = p - argv[0]; 149 if (*p == '\0' && (len == 8 || len == 10)) { 150 timeset = 1; 151 stime_arg2(*argv++, len == 10, tv); 152 } 153 } 154 /* Both times default to the same. */ 155 tv[1] = tv[0]; 156 } 157 158 if (*argv == NULL) 159 usage(myname); 160 161 if (Aflag) 162 cflag = 1; 163 164 for (rval = 0; *argv; ++argv) { 165 /* See if the file exists. */ 166 if (stat_f(*argv, &sb) != 0) { 167 if (errno != ENOENT) { 168 rval = 1; 169 warn("%s", *argv); 170 continue; 171 } 172 if (!cflag) { 173 /* Create the file. */ 174 fd = open(*argv, 175 O_WRONLY | O_CREAT, DEFFILEMODE); 176 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 177 rval = 1; 178 warn("%s", *argv); 179 continue; 180 } 181 182 /* If using the current time, we're done. */ 183 if (!timeset) 184 continue; 185 } else 186 continue; 187 } 188 189 if (!aflag) 190 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim); 191 if (!mflag) 192 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim); 193 194 /* 195 * We're adjusting the times based on the file times, not a 196 * specified time (that gets handled above). 197 */ 198 if (Aflag) { 199 if (aflag) { 200 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim); 201 tv[0].tv_sec += Aflag; 202 } 203 if (mflag) { 204 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim); 205 tv[1].tv_sec += Aflag; 206 } 207 } 208 209 /* Try utimes(2). */ 210 if (!utimes_f(*argv, tv)) 211 continue; 212 213 /* If the user specified a time, nothing else we can do. */ 214 if (timeset || Aflag) { 215 rval = 1; 216 warn("%s", *argv); 217 continue; 218 } 219 220 /* 221 * System V and POSIX 1003.1 require that a NULL argument 222 * set the access/modification times to the current time. 223 * The permission checks are different, too, in that the 224 * ability to write the file is sufficient. Take a shot. 225 */ 226 if (!utimes_f(*argv, NULL)) 227 continue; 228 229 /* Try reading/writing. */ 230 if (!S_ISLNK(sb.st_mode) && !S_ISDIR(sb.st_mode)) { 231 if (rw(*argv, &sb, fflag)) 232 rval = 1; 233 } else { 234 rval = 1; 235 warn("%s", *argv); 236 } 237 } 238 exit(rval); 239 } 240 241 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 242 243 void 244 stime_arg1(char *arg, struct timeval *tvp) 245 { 246 time_t now; 247 struct tm *t; 248 int yearset; 249 char *p; 250 /* Start with the current time. */ 251 now = tvp[0].tv_sec; 252 if ((t = localtime(&now)) == NULL) 253 err(1, "localtime"); 254 /* [[CC]YY]MMDDhhmm[.SS] */ 255 if ((p = strchr(arg, '.')) == NULL) 256 t->tm_sec = 0; /* Seconds defaults to 0. */ 257 else { 258 if (strlen(p + 1) != 2) 259 goto terr; 260 *p++ = '\0'; 261 t->tm_sec = ATOI2(p); 262 } 263 264 yearset = 0; 265 switch(strlen(arg)) { 266 case 12: /* CCYYMMDDhhmm */ 267 t->tm_year = ATOI2(arg); 268 t->tm_year *= 100; 269 yearset = 1; 270 /* FALLTHROUGH */ 271 case 10: /* YYMMDDhhmm */ 272 if (yearset) { 273 yearset = ATOI2(arg); 274 t->tm_year += yearset; 275 } else { 276 yearset = ATOI2(arg); 277 if (yearset < 69) 278 t->tm_year = yearset + 2000; 279 else 280 t->tm_year = yearset + 1900; 281 } 282 t->tm_year -= 1900; /* Convert to UNIX time. */ 283 /* FALLTHROUGH */ 284 case 8: /* MMDDhhmm */ 285 t->tm_mon = ATOI2(arg); 286 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 287 t->tm_mday = ATOI2(arg); 288 t->tm_hour = ATOI2(arg); 289 t->tm_min = ATOI2(arg); 290 break; 291 default: 292 goto terr; 293 } 294 295 t->tm_isdst = -1; /* Figure out DST. */ 296 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 297 if (tvp[0].tv_sec == -1) 298 terr: errx(1, 299 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 300 301 tvp[0].tv_usec = tvp[1].tv_usec = 0; 302 } 303 304 void 305 stime_arg2(char *arg, int year, struct timeval *tvp) 306 { 307 time_t now; 308 struct tm *t; 309 /* Start with the current time. */ 310 now = tvp[0].tv_sec; 311 if ((t = localtime(&now)) == NULL) 312 err(1, "localtime"); 313 314 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 315 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 316 t->tm_mday = ATOI2(arg); 317 t->tm_hour = ATOI2(arg); 318 t->tm_min = ATOI2(arg); 319 if (year) { 320 t->tm_year = ATOI2(arg); 321 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 322 t->tm_year += 100; 323 } 324 325 t->tm_isdst = -1; /* Figure out DST. */ 326 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 327 if (tvp[0].tv_sec == -1) 328 errx(1, 329 "out of range or illegal time specification: MMDDhhmm[yy]"); 330 331 tvp[0].tv_usec = tvp[1].tv_usec = 0; 332 } 333 334 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */ 335 int 336 timeoffset(char *arg) 337 { 338 int offset; 339 int isneg; 340 341 offset = 0; 342 isneg = *arg == '-'; 343 if (isneg) 344 arg++; 345 switch (strlen(arg)) { 346 default: /* invalid */ 347 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS"); 348 349 case 6: /* HHMMSS */ 350 offset = ATOI2(arg); 351 /* FALLTHROUGH */ 352 case 4: /* MMSS */ 353 offset = offset * 60 + ATOI2(arg); 354 /* FALLTHROUGH */ 355 case 2: /* SS */ 356 offset = offset * 60 + ATOI2(arg); 357 } 358 if (isneg) 359 return (-offset); 360 else 361 return (offset); 362 } 363 364 void 365 stime_file(char *fname, struct timeval *tvp) 366 { 367 struct stat sb; 368 369 if (stat(fname, &sb)) 370 err(1, "%s", fname); 371 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atim); 372 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtim); 373 } 374 375 int 376 rw(char *fname, struct stat *sbp, int force) 377 { 378 int fd, needed_chmod, rval; 379 u_char byte; 380 381 /* Try regular files. */ 382 if (!S_ISREG(sbp->st_mode)) { 383 warnx("%s: %s", fname, strerror(EFTYPE)); 384 return (1); 385 } 386 387 needed_chmod = rval = 0; 388 if ((fd = open(fname, O_RDWR, 0)) == -1) { 389 if (!force || chmod(fname, DEFFILEMODE)) 390 goto err; 391 if ((fd = open(fname, O_RDWR, 0)) == -1) 392 goto err; 393 needed_chmod = 1; 394 } 395 396 if (sbp->st_size != 0) { 397 if (read(fd, &byte, sizeof(byte)) != sizeof(byte)) 398 goto err; 399 if (lseek(fd, (off_t)0, SEEK_SET) == -1) 400 goto err; 401 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) 402 goto err; 403 } else { 404 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) { 405 err: rval = 1; 406 warn("%s", fname); 407 } else if (ftruncate(fd, (off_t)0)) { 408 rval = 1; 409 warn("%s: file modified", fname); 410 } 411 } 412 413 if (close(fd) && rval != 1) { 414 rval = 1; 415 warn("%s", fname); 416 } 417 if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) { 418 rval = 1; 419 warn("%s: permissions modified", fname); 420 } 421 return (rval); 422 } 423 424 void 425 usage(char *myname) 426 { 427 fprintf(stderr, "usage:\n" "%s [-A [-][[hh]mm]SS] [-acfhm] [-r file] " 428 "[-t [[CC]YY]MMDDhhmm[.SS]] file ...\n", myname); 429 exit(1); 430 } 431