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 timeval *); 60 static void stime_arg2(const char *, int, struct timeval *); 61 static void stime_darg(const char *, struct timeval *); 62 static void stime_file(const char *, struct timeval *); 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 timeval tv[2]; 71 int (*stat_f)(const char *, struct stat *); 72 int (*utimes_f)(const char *, const struct timeval *); 73 int Aflag, aflag, cflag, mflag, ch, fd, len, rval, timeset; 74 char *p; 75 char *myname; 76 77 myname = basename(argv[0]); 78 Aflag = aflag = cflag = mflag = timeset = 0; 79 stat_f = stat; 80 utimes_f = utimes; 81 if (gettimeofday(&tv[0], NULL) == -1) 82 err(1, "gettimeofday"); 83 84 while ((ch = getopt(argc, argv, "A:acd:fhmr:t:")) != -1) 85 switch(ch) { 86 case 'A': 87 Aflag = timeoffset(optarg); 88 break; 89 case 'a': 90 aflag = 1; 91 break; 92 case 'c': 93 cflag = 1; 94 break; 95 case 'd': 96 timeset = 1; 97 stime_darg(optarg, tv); 98 break; 99 case 'f': 100 /* No-op for compatibility. */ 101 break; 102 case 'h': 103 cflag = 1; 104 stat_f = lstat; 105 utimes_f = lutimes; 106 break; 107 case 'm': 108 mflag = 1; 109 break; 110 case 'r': 111 timeset = 1; 112 stime_file(optarg, tv); 113 break; 114 case 't': 115 timeset = 1; 116 stime_arg1(optarg, tv); 117 break; 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 rval = 1; 230 warn("%s", *argv); 231 } 232 exit(rval); 233 } 234 235 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 236 237 static void 238 stime_arg1(const char *arg, struct timeval *tvp) 239 { 240 time_t now; 241 struct tm *t; 242 int yearset; 243 char *p; 244 /* Start with the current time. */ 245 now = tvp[0].tv_sec; 246 if ((t = localtime(&now)) == NULL) 247 err(1, "localtime"); 248 /* [[CC]YY]MMDDhhmm[.SS] */ 249 if ((p = strchr(arg, '.')) == NULL) 250 t->tm_sec = 0; /* Seconds defaults to 0. */ 251 else { 252 if (strlen(p + 1) != 2) 253 goto terr; 254 *p++ = '\0'; 255 t->tm_sec = ATOI2(p); 256 } 257 258 yearset = 0; 259 switch(strlen(arg)) { 260 case 12: /* CCYYMMDDhhmm */ 261 t->tm_year = ATOI2(arg); 262 t->tm_year *= 100; 263 yearset = 1; 264 /* FALLTHROUGH */ 265 case 10: /* YYMMDDhhmm */ 266 if (yearset) { 267 yearset = ATOI2(arg); 268 t->tm_year += yearset; 269 } else { 270 yearset = ATOI2(arg); 271 if (yearset < 69) 272 t->tm_year = yearset + 2000; 273 else 274 t->tm_year = yearset + 1900; 275 } 276 t->tm_year -= 1900; /* Convert to UNIX time. */ 277 /* FALLTHROUGH */ 278 case 8: /* MMDDhhmm */ 279 t->tm_mon = ATOI2(arg); 280 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 281 t->tm_mday = ATOI2(arg); 282 t->tm_hour = ATOI2(arg); 283 t->tm_min = ATOI2(arg); 284 break; 285 default: 286 goto terr; 287 } 288 289 t->tm_isdst = -1; /* Figure out DST. */ 290 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 291 if (tvp[0].tv_sec == -1) 292 goto terr; 293 294 tvp[0].tv_usec = tvp[1].tv_usec = 0; 295 return; 296 297 terr: 298 errx(1, "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 299 } 300 301 static void 302 stime_arg2(const char *arg, int year, struct timeval *tvp) 303 { 304 time_t now; 305 struct tm *t; 306 /* Start with the current time. */ 307 now = tvp[0].tv_sec; 308 if ((t = localtime(&now)) == NULL) 309 err(1, "localtime"); 310 311 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 312 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 313 t->tm_mday = ATOI2(arg); 314 t->tm_hour = ATOI2(arg); 315 t->tm_min = ATOI2(arg); 316 if (year) { 317 t->tm_year = ATOI2(arg); 318 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 319 t->tm_year += 100; 320 } 321 322 t->tm_isdst = -1; /* Figure out DST. */ 323 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 324 if (tvp[0].tv_sec == -1) 325 errx(1, 326 "out of range or illegal time specification: MMDDhhmm[yy]"); 327 328 tvp[0].tv_usec = tvp[1].tv_usec = 0; 329 } 330 331 static void 332 stime_darg(const char *arg, struct timeval *tvp) 333 { 334 struct tm t = { .tm_sec = 0 }; 335 const char *fmt, *colon; 336 char *p; 337 int val, isutc = 0; 338 339 tvp[0].tv_usec = 0; 340 t.tm_isdst = -1; 341 colon = strchr(arg, ':'); 342 if (colon == NULL || strchr(colon + 1, ':') == NULL) 343 goto bad; 344 fmt = strchr(arg, 'T') != NULL ? "%Y-%m-%dT%H:%M:%S" : 345 "%Y-%m-%d %H:%M:%S"; 346 p = strptime(arg, fmt, &t); 347 if (p == NULL) 348 goto bad; 349 /* POSIX: must have at least one digit after dot */ 350 if ((*p == '.' || *p == ',') && isdigit((unsigned char)p[1])) { 351 p++; 352 val = 100000; 353 while (isdigit((unsigned char)*p)) { 354 tvp[0].tv_usec += val * (*p - '0'); 355 p++; 356 val /= 10; 357 } 358 } 359 if (*p == 'Z') { 360 isutc = 1; 361 p++; 362 } 363 if (*p != '\0') 364 goto bad; 365 366 tvp[0].tv_sec = isutc ? timegm(&t) : mktime(&t); 367 368 tvp[1] = tvp[0]; 369 return; 370 371 bad: 372 errx(1, "out of range or illegal time specification: YYYY-MM-DDThh:mm:SS[.frac][tz]"); 373 } 374 375 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */ 376 int 377 timeoffset(const char *arg) 378 { 379 int offset; 380 int isneg; 381 382 offset = 0; 383 isneg = *arg == '-'; 384 if (isneg) 385 arg++; 386 switch (strlen(arg)) { 387 default: /* invalid */ 388 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS"); 389 390 case 6: /* HHMMSS */ 391 offset = ATOI2(arg); 392 /* FALLTHROUGH */ 393 case 4: /* MMSS */ 394 offset = offset * 60 + ATOI2(arg); 395 /* FALLTHROUGH */ 396 case 2: /* SS */ 397 offset = offset * 60 + ATOI2(arg); 398 } 399 if (isneg) 400 return (-offset); 401 else 402 return (offset); 403 } 404 405 static void 406 stime_file(const char *fname, struct timeval *tvp) 407 { 408 struct stat sb; 409 410 if (stat(fname, &sb)) 411 err(1, "%s", fname); 412 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atim); 413 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtim); 414 } 415 416 static void 417 usage(const char *myname) 418 { 419 fprintf(stderr, "usage: %s [-A [-][[hh]mm]SS] [-achm] [-r file] " 420 "[-t [[CC]YY]MMDDhhmm[.SS]]\n" 421 " [-d YYYY-MM-DDThh:mm:SS[.frac][tz]] " 422 "file ...\n", myname); 423 exit(1); 424 } 425