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 <ctype.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <libgen.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <time.h> 57 #include <unistd.h> 58 59 static void stime_arg1(const char *, struct timespec *); 60 static void stime_arg2(const char *, int, struct timespec *); 61 static void stime_darg(const char *, struct timespec *); 62 static void stime_file(const char *, struct timespec *); 63 static int timeoffset(const char *); 64 static void usage(const char *); 65 66 int 67 main(int argc, char *argv[]) 68 { 69 struct stat sb; 70 struct timespec ts[2]; 71 int atflag; 72 int Aflag, aflag, cflag, mflag, ch, fd, len, rval, timeset; 73 char *p; 74 char *myname; 75 76 myname = basename(argv[0]); 77 Aflag = aflag = cflag = mflag = timeset = 0; 78 atflag = 0; 79 if (clock_gettime(CLOCK_REALTIME, &ts[0]) == -1) 80 err(1, "clock_gettime(CLOCK_REALTIME)"); 81 82 while ((ch = getopt(argc, argv, "A:acd:fhmr:t:")) != -1) 83 switch(ch) { 84 case 'A': 85 Aflag = timeoffset(optarg); 86 break; 87 case 'a': 88 aflag = 1; 89 break; 90 case 'c': 91 cflag = 1; 92 break; 93 case 'd': 94 timeset = 1; 95 stime_darg(optarg, ts); 96 break; 97 case 'f': 98 /* No-op for compatibility. */ 99 break; 100 case 'h': 101 cflag = 1; 102 atflag = AT_SYMLINK_NOFOLLOW; 103 break; 104 case 'm': 105 mflag = 1; 106 break; 107 case 'r': 108 timeset = 1; 109 stime_file(optarg, ts); 110 break; 111 case 't': 112 timeset = 1; 113 stime_arg1(optarg, ts); 114 break; 115 default: 116 usage(myname); 117 } 118 argc -= optind; 119 argv += optind; 120 121 if (aflag == 0 && mflag == 0) 122 aflag = mflag = 1; 123 124 if (timeset) { 125 if (Aflag) { 126 /* 127 * We're setting the time to an offset from a specified 128 * time. God knows why, but it means that we can set 129 * that time once and for all here. 130 */ 131 if (aflag) 132 ts[0].tv_sec += Aflag; 133 if (mflag) 134 ts[1].tv_sec += Aflag; 135 Aflag = 0; /* done our job */ 136 } 137 } else { 138 /* 139 * If no -r or -t flag, at least two operands, the first of 140 * which is an 8 or 10 digit number, use the obsolete time 141 * specification, otherwise use the current time. 142 */ 143 if (argc > 1) { 144 strtol(argv[0], &p, 10); 145 len = p - argv[0]; 146 if (*p == '\0' && (len == 8 || len == 10)) { 147 timeset = 1; 148 stime_arg2(*argv++, len == 10, ts); 149 } 150 } 151 /* Both times default to the same. */ 152 ts[1] = ts[0]; 153 } 154 155 if (*argv == NULL) 156 usage(myname); 157 158 if (Aflag) 159 cflag = 1; 160 161 for (rval = 0; *argv; ++argv) { 162 /* See if the file exists. */ 163 if (fstatat(AT_FDCWD, *argv, &sb, atflag) != 0) { 164 if (errno != ENOENT) { 165 rval = 1; 166 warn("%s", *argv); 167 continue; 168 } 169 if (!cflag) { 170 /* Create the file. */ 171 fd = open(*argv, 172 O_WRONLY | O_CREAT, DEFFILEMODE); 173 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 174 rval = 1; 175 warn("%s", *argv); 176 continue; 177 } 178 179 /* If using the current time, we're done. */ 180 if (!timeset) 181 continue; 182 } else 183 continue; 184 } 185 186 if (!aflag) 187 ts[0] = sb.st_atim; 188 if (!mflag) 189 ts[1] = sb.st_mtim; 190 191 /* 192 * We're adjusting the times based on the file times, not a 193 * specified time (that gets handled above). 194 */ 195 if (Aflag) { 196 if (aflag) { 197 ts[0] = sb.st_atim; 198 ts[0].tv_sec += Aflag; 199 } 200 if (mflag) { 201 ts[1] = sb.st_mtim; 202 ts[1].tv_sec += Aflag; 203 } 204 } 205 206 /* Try utimensat(2). */ 207 if (!utimensat(AT_FDCWD, *argv, ts, atflag)) 208 continue; 209 210 /* If the user specified a time, nothing else we can do. */ 211 if (timeset || Aflag) { 212 rval = 1; 213 warn("%s", *argv); 214 continue; 215 } 216 217 /* 218 * System V and POSIX 1003.1 require that a NULL argument 219 * set the access/modification times to the current time. 220 * The permission checks are different, too, in that the 221 * ability to write the file is sufficient. Take a shot. 222 */ 223 if (!utimensat(AT_FDCWD, *argv, NULL, atflag)) 224 continue; 225 226 rval = 1; 227 warn("%s", *argv); 228 } 229 exit(rval); 230 } 231 232 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 233 234 static void 235 stime_arg1(const char *arg, struct timespec *tvp) 236 { 237 time_t now; 238 struct tm *t; 239 int yearset; 240 char *p; 241 /* Start with the current time. */ 242 now = tvp[0].tv_sec; 243 if ((t = localtime(&now)) == NULL) 244 err(1, "localtime"); 245 /* [[CC]YY]MMDDhhmm[.SS] */ 246 if ((p = strchr(arg, '.')) == NULL) 247 t->tm_sec = 0; /* Seconds defaults to 0. */ 248 else { 249 if (strlen(p + 1) != 2) 250 goto terr; 251 *p++ = '\0'; 252 t->tm_sec = ATOI2(p); 253 } 254 255 yearset = 0; 256 switch(strlen(arg)) { 257 case 12: /* CCYYMMDDhhmm */ 258 t->tm_year = ATOI2(arg); 259 t->tm_year *= 100; 260 yearset = 1; 261 /* FALLTHROUGH */ 262 case 10: /* YYMMDDhhmm */ 263 if (yearset) { 264 yearset = ATOI2(arg); 265 t->tm_year += yearset; 266 } else { 267 yearset = ATOI2(arg); 268 if (yearset < 69) 269 t->tm_year = yearset + 2000; 270 else 271 t->tm_year = yearset + 1900; 272 } 273 t->tm_year -= 1900; /* Convert to UNIX time. */ 274 /* FALLTHROUGH */ 275 case 8: /* MMDDhhmm */ 276 t->tm_mon = ATOI2(arg); 277 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 278 t->tm_mday = ATOI2(arg); 279 t->tm_hour = ATOI2(arg); 280 t->tm_min = ATOI2(arg); 281 break; 282 default: 283 goto terr; 284 } 285 286 t->tm_isdst = -1; /* Figure out DST. */ 287 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 288 if (tvp[0].tv_sec == -1) 289 goto terr; 290 291 tvp[0].tv_nsec = tvp[1].tv_nsec = 0; 292 return; 293 294 terr: 295 errx(1, "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 296 } 297 298 static void 299 stime_arg2(const char *arg, int year, struct timespec *tvp) 300 { 301 time_t now; 302 struct tm *t; 303 /* Start with the current time. */ 304 now = tvp[0].tv_sec; 305 if ((t = localtime(&now)) == NULL) 306 err(1, "localtime"); 307 308 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 309 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 310 t->tm_mday = ATOI2(arg); 311 t->tm_hour = ATOI2(arg); 312 t->tm_min = ATOI2(arg); 313 if (year) { 314 t->tm_year = ATOI2(arg); 315 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 316 t->tm_year += 100; 317 } 318 319 t->tm_isdst = -1; /* Figure out DST. */ 320 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 321 if (tvp[0].tv_sec == -1) 322 errx(1, 323 "out of range or illegal time specification: MMDDhhmm[yy]"); 324 325 tvp[0].tv_nsec = tvp[1].tv_nsec = 0; 326 } 327 328 static void 329 stime_darg(const char *arg, struct timespec *tvp) 330 { 331 struct tm t = { .tm_sec = 0 }; 332 const char *fmt, *colon; 333 char *p; 334 int val, isutc = 0; 335 336 tvp[0].tv_nsec = 0; 337 t.tm_isdst = -1; 338 colon = strchr(arg, ':'); 339 if (colon == NULL || strchr(colon + 1, ':') == NULL) 340 goto bad; 341 fmt = strchr(arg, 'T') != NULL ? "%Y-%m-%dT%H:%M:%S" : 342 "%Y-%m-%d %H:%M:%S"; 343 p = strptime(arg, fmt, &t); 344 if (p == NULL) 345 goto bad; 346 /* POSIX: must have at least one digit after dot */ 347 if ((*p == '.' || *p == ',') && isdigit((unsigned char)p[1])) { 348 p++; 349 val = 100000000; 350 while (isdigit((unsigned char)*p)) { 351 tvp[0].tv_nsec += val * (*p - '0'); 352 p++; 353 val /= 10; 354 } 355 } 356 if (*p == 'Z') { 357 isutc = 1; 358 p++; 359 } 360 if (*p != '\0') 361 goto bad; 362 363 tvp[0].tv_sec = isutc ? timegm(&t) : mktime(&t); 364 365 tvp[1] = tvp[0]; 366 return; 367 368 bad: 369 errx(1, "out of range or illegal time specification: YYYY-MM-DDThh:mm:SS[.frac][tz]"); 370 } 371 372 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */ 373 int 374 timeoffset(const char *arg) 375 { 376 int offset; 377 int isneg; 378 379 offset = 0; 380 isneg = *arg == '-'; 381 if (isneg) 382 arg++; 383 switch (strlen(arg)) { 384 default: /* invalid */ 385 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS"); 386 387 case 6: /* HHMMSS */ 388 offset = ATOI2(arg); 389 /* FALLTHROUGH */ 390 case 4: /* MMSS */ 391 offset = offset * 60 + ATOI2(arg); 392 /* FALLTHROUGH */ 393 case 2: /* SS */ 394 offset = offset * 60 + ATOI2(arg); 395 } 396 if (isneg) 397 return (-offset); 398 else 399 return (offset); 400 } 401 402 static void 403 stime_file(const char *fname, struct timespec *tsp) 404 { 405 struct stat sb; 406 407 if (stat(fname, &sb)) 408 err(1, "%s", fname); 409 tsp[0] = sb.st_atim; 410 tsp[1] = sb.st_mtim; 411 } 412 413 static void 414 usage(const char *myname) 415 { 416 fprintf(stderr, "usage: %s [-A [-][[hh]mm]SS] [-achm] [-r file] " 417 "[-t [[CC]YY]MMDDhhmm[.SS]]\n" 418 " [-d YYYY-MM-DDThh:mm:SS[.frac][tz]] " 419 "file ...\n", myname); 420 exit(1); 421 } 422