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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 32 __FBSDID("$FreeBSD$"); 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 39 40 #ifndef lint 41 static const char sccsid[] = "@(#)touch.c 8.1 (Berkeley) 6/6/93"; 42 #endif 43 44 #include <sys/types.h> 45 #include <sys/stat.h> 46 #include <sys/time.h> 47 48 #include <err.h> 49 #include <errno.h> 50 #include <fcntl.h> 51 #include <libgen.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <time.h> 56 #include <unistd.h> 57 58 int rw(char *, struct stat *, int); 59 void stime_arg1(char *, struct timeval *); 60 void stime_arg2(char *, int, struct timeval *); 61 void stime_file(char *, struct timeval *); 62 int timeoffset(char *); 63 void usage(char *); 64 65 int 66 main(int argc, char *argv[]) 67 { 68 struct stat sb; 69 struct timeval tv[2]; 70 int (*stat_f)(const char *, struct stat *); 71 int (*utimes_f)(const char *, const struct timeval *); 72 int Aflag, aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset; 73 char *p; 74 char *myname; 75 76 myname = basename(argv[0]); 77 Aflag = aflag = cflag = fflag = mflag = timeset = 0; 78 stat_f = stat; 79 utimes_f = utimes; 80 if (gettimeofday(&tv[0], NULL)) 81 err(1, "gettimeofday"); 82 83 while ((ch = getopt(argc, argv, "A:acfhmr:t:")) != -1) 84 switch(ch) { 85 case 'A': 86 Aflag = timeoffset(optarg); 87 break; 88 case 'a': 89 aflag = 1; 90 break; 91 case 'c': 92 cflag = 1; 93 break; 94 case 'f': 95 fflag = 1; 96 break; 97 case 'h': 98 cflag = 1; 99 stat_f = lstat; 100 utimes_f = lutimes; 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(myname); 116 } 117 argc -= optind; 118 argv += optind; 119 120 if (aflag == 0 && mflag == 0) 121 aflag = mflag = 1; 122 123 if (timeset) { 124 if (Aflag) { 125 /* 126 * We're setting the time to an offset from a specified 127 * time. God knows why, but it means that we can set 128 * that time once and for all here. 129 */ 130 if (aflag) 131 tv[0].tv_sec += Aflag; 132 if (mflag) 133 tv[1].tv_sec += Aflag; 134 Aflag = 0; /* done our job */ 135 } 136 } else { 137 /* 138 * If no -r or -t flag, at least two operands, the first of 139 * which is an 8 or 10 digit number, use the obsolete time 140 * specification, otherwise use the current time. 141 */ 142 if (argc > 1) { 143 strtol(argv[0], &p, 10); 144 len = p - argv[0]; 145 if (*p == '\0' && (len == 8 || len == 10)) { 146 timeset = 1; 147 stime_arg2(*argv++, len == 10, tv); 148 } 149 } 150 /* Both times default to the same. */ 151 tv[1] = tv[0]; 152 } 153 154 if (*argv == NULL) 155 usage(myname); 156 157 if (Aflag) 158 cflag = 1; 159 160 for (rval = 0; *argv; ++argv) { 161 /* See if the file exists. */ 162 if (stat_f(*argv, &sb) != 0) { 163 if (errno != ENOENT) { 164 rval = 1; 165 warn("%s", *argv); 166 continue; 167 } 168 if (!cflag) { 169 /* Create the file. */ 170 fd = open(*argv, 171 O_WRONLY | O_CREAT, DEFFILEMODE); 172 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 173 rval = 1; 174 warn("%s", *argv); 175 continue; 176 } 177 178 /* If using the current time, we're done. */ 179 if (!timeset) 180 continue; 181 } else 182 continue; 183 } 184 185 if (!aflag) 186 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim); 187 if (!mflag) 188 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim); 189 190 /* 191 * We're adjusting the times based on the file times, not a 192 * specified time (that gets handled above). 193 */ 194 if (Aflag) { 195 if (aflag) { 196 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim); 197 tv[0].tv_sec += Aflag; 198 } 199 if (mflag) { 200 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim); 201 tv[1].tv_sec += Aflag; 202 } 203 } 204 205 /* Try utimes(2). */ 206 if (!utimes_f(*argv, tv)) 207 continue; 208 209 /* If the user specified a time, nothing else we can do. */ 210 if (timeset || Aflag) { 211 rval = 1; 212 warn("%s", *argv); 213 continue; 214 } 215 216 /* 217 * System V and POSIX 1003.1 require that a NULL argument 218 * set the access/modification times to the current time. 219 * The permission checks are different, too, in that the 220 * ability to write the file is sufficient. Take a shot. 221 */ 222 if (!utimes_f(*argv, NULL)) 223 continue; 224 225 /* Try reading/writing. */ 226 if (!S_ISLNK(sb.st_mode) && !S_ISDIR(sb.st_mode)) { 227 if (rw(*argv, &sb, fflag)) 228 rval = 1; 229 } else { 230 rval = 1; 231 warn("%s", *argv); 232 } 233 } 234 exit(rval); 235 } 236 237 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 238 239 void 240 stime_arg1(char *arg, struct timeval *tvp) 241 { 242 time_t now; 243 struct tm *t; 244 int yearset; 245 char *p; 246 /* Start with the current time. */ 247 now = tvp[0].tv_sec; 248 if ((t = localtime(&now)) == NULL) 249 err(1, "localtime"); 250 /* [[CC]YY]MMDDhhmm[.SS] */ 251 if ((p = strchr(arg, '.')) == NULL) 252 t->tm_sec = 0; /* Seconds defaults to 0. */ 253 else { 254 if (strlen(p + 1) != 2) 255 goto terr; 256 *p++ = '\0'; 257 t->tm_sec = ATOI2(p); 258 } 259 260 yearset = 0; 261 switch(strlen(arg)) { 262 case 12: /* CCYYMMDDhhmm */ 263 t->tm_year = ATOI2(arg); 264 t->tm_year *= 100; 265 yearset = 1; 266 /* FALLTHROUGH */ 267 case 10: /* YYMMDDhhmm */ 268 if (yearset) { 269 yearset = ATOI2(arg); 270 t->tm_year += yearset; 271 } else { 272 yearset = ATOI2(arg); 273 if (yearset < 69) 274 t->tm_year = yearset + 2000; 275 else 276 t->tm_year = yearset + 1900; 277 } 278 t->tm_year -= 1900; /* Convert to UNIX time. */ 279 /* FALLTHROUGH */ 280 case 8: /* MMDDhhmm */ 281 t->tm_mon = ATOI2(arg); 282 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 283 t->tm_mday = ATOI2(arg); 284 t->tm_hour = ATOI2(arg); 285 t->tm_min = ATOI2(arg); 286 break; 287 default: 288 goto terr; 289 } 290 291 t->tm_isdst = -1; /* Figure out DST. */ 292 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 293 if (tvp[0].tv_sec == -1) 294 terr: errx(1, 295 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 296 297 tvp[0].tv_usec = tvp[1].tv_usec = 0; 298 } 299 300 void 301 stime_arg2(char *arg, int year, struct timeval *tvp) 302 { 303 time_t now; 304 struct tm *t; 305 /* Start with the current time. */ 306 now = tvp[0].tv_sec; 307 if ((t = localtime(&now)) == NULL) 308 err(1, "localtime"); 309 310 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 311 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 312 t->tm_mday = ATOI2(arg); 313 t->tm_hour = ATOI2(arg); 314 t->tm_min = ATOI2(arg); 315 if (year) { 316 t->tm_year = ATOI2(arg); 317 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 318 t->tm_year += 100; 319 } 320 321 t->tm_isdst = -1; /* Figure out DST. */ 322 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 323 if (tvp[0].tv_sec == -1) 324 errx(1, 325 "out of range or illegal time specification: MMDDhhmm[yy]"); 326 327 tvp[0].tv_usec = tvp[1].tv_usec = 0; 328 } 329 330 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */ 331 int 332 timeoffset(char *arg) 333 { 334 int offset; 335 int isneg; 336 337 offset = 0; 338 isneg = *arg == '-'; 339 if (isneg) 340 arg++; 341 switch (strlen(arg)) { 342 default: /* invalid */ 343 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS"); 344 345 case 6: /* HHMMSS */ 346 offset = ATOI2(arg); 347 /* FALLTHROUGH */ 348 case 4: /* MMSS */ 349 offset = offset * 60 + ATOI2(arg); 350 /* FALLTHROUGH */ 351 case 2: /* SS */ 352 offset = offset * 60 + ATOI2(arg); 353 } 354 if (isneg) 355 return (-offset); 356 else 357 return (offset); 358 } 359 360 void 361 stime_file(char *fname, struct timeval *tvp) 362 { 363 struct stat sb; 364 365 if (stat(fname, &sb)) 366 err(1, "%s", fname); 367 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atim); 368 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtim); 369 } 370 371 int 372 rw(char *fname, struct stat *sbp, int force) 373 { 374 int fd, needed_chmod, rval; 375 u_char byte; 376 377 /* Try regular files. */ 378 if (!S_ISREG(sbp->st_mode)) { 379 warnx("%s: %s", fname, strerror(EFTYPE)); 380 return (1); 381 } 382 383 needed_chmod = rval = 0; 384 if ((fd = open(fname, O_RDWR, 0)) == -1) { 385 if (!force || chmod(fname, DEFFILEMODE)) 386 goto err; 387 if ((fd = open(fname, O_RDWR, 0)) == -1) 388 goto err; 389 needed_chmod = 1; 390 } 391 392 if (sbp->st_size != 0) { 393 if (read(fd, &byte, sizeof(byte)) != sizeof(byte)) 394 goto err; 395 if (lseek(fd, (off_t)0, SEEK_SET) == -1) 396 goto err; 397 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) 398 goto err; 399 } else { 400 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) { 401 err: rval = 1; 402 warn("%s", fname); 403 } else if (ftruncate(fd, (off_t)0)) { 404 rval = 1; 405 warn("%s: file modified", fname); 406 } 407 } 408 409 if (close(fd) && rval != 1) { 410 rval = 1; 411 warn("%s", fname); 412 } 413 if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) { 414 rval = 1; 415 warn("%s: permissions modified", fname); 416 } 417 return (rval); 418 } 419 420 void 421 usage(char *myname) 422 { 423 fprintf(stderr, "usage:\n" "%s [-A [-][[hh]mm]SS] [-acfhm] [-r file] " 424 "[-t [[CC]YY]MMDDhhmm[.SS]] file ...\n", myname); 425 exit(1); 426 } 427