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 void stime_arg1(char *, struct timeval *); 60 void stime_arg2(char *, int, struct timeval *); 61 void stime_darg(char *, struct timeval *); 62 void stime_file(char *, struct timeval *); 63 int timeoffset(char *); 64 void usage(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)) 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 case '?': 119 default: 120 usage(myname); 121 } 122 argc -= optind; 123 argv += optind; 124 125 if (aflag == 0 && mflag == 0) 126 aflag = mflag = 1; 127 128 if (timeset) { 129 if (Aflag) { 130 /* 131 * We're setting the time to an offset from a specified 132 * time. God knows why, but it means that we can set 133 * that time once and for all here. 134 */ 135 if (aflag) 136 tv[0].tv_sec += Aflag; 137 if (mflag) 138 tv[1].tv_sec += Aflag; 139 Aflag = 0; /* done our job */ 140 } 141 } else { 142 /* 143 * If no -r or -t flag, at least two operands, the first of 144 * which is an 8 or 10 digit number, use the obsolete time 145 * specification, otherwise use the current time. 146 */ 147 if (argc > 1) { 148 strtol(argv[0], &p, 10); 149 len = p - argv[0]; 150 if (*p == '\0' && (len == 8 || len == 10)) { 151 timeset = 1; 152 stime_arg2(*argv++, len == 10, tv); 153 } 154 } 155 /* Both times default to the same. */ 156 tv[1] = tv[0]; 157 } 158 159 if (*argv == NULL) 160 usage(myname); 161 162 if (Aflag) 163 cflag = 1; 164 165 for (rval = 0; *argv; ++argv) { 166 /* See if the file exists. */ 167 if (stat_f(*argv, &sb) != 0) { 168 if (errno != ENOENT) { 169 rval = 1; 170 warn("%s", *argv); 171 continue; 172 } 173 if (!cflag) { 174 /* Create the file. */ 175 fd = open(*argv, 176 O_WRONLY | O_CREAT, DEFFILEMODE); 177 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 178 rval = 1; 179 warn("%s", *argv); 180 continue; 181 } 182 183 /* If using the current time, we're done. */ 184 if (!timeset) 185 continue; 186 } else 187 continue; 188 } 189 190 if (!aflag) 191 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim); 192 if (!mflag) 193 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim); 194 195 /* 196 * We're adjusting the times based on the file times, not a 197 * specified time (that gets handled above). 198 */ 199 if (Aflag) { 200 if (aflag) { 201 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim); 202 tv[0].tv_sec += Aflag; 203 } 204 if (mflag) { 205 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim); 206 tv[1].tv_sec += Aflag; 207 } 208 } 209 210 /* Try utimes(2). */ 211 if (!utimes_f(*argv, tv)) 212 continue; 213 214 /* If the user specified a time, nothing else we can do. */ 215 if (timeset || Aflag) { 216 rval = 1; 217 warn("%s", *argv); 218 continue; 219 } 220 221 /* 222 * System V and POSIX 1003.1 require that a NULL argument 223 * set the access/modification times to the current time. 224 * The permission checks are different, too, in that the 225 * ability to write the file is sufficient. Take a shot. 226 */ 227 if (!utimes_f(*argv, NULL)) 228 continue; 229 230 rval = 1; 231 warn("%s", *argv); 232 } 233 exit(rval); 234 } 235 236 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 237 238 void 239 stime_arg1(char *arg, struct timeval *tvp) 240 { 241 time_t now; 242 struct tm *t; 243 int yearset; 244 char *p; 245 /* Start with the current time. */ 246 now = tvp[0].tv_sec; 247 if ((t = localtime(&now)) == NULL) 248 err(1, "localtime"); 249 /* [[CC]YY]MMDDhhmm[.SS] */ 250 if ((p = strchr(arg, '.')) == NULL) 251 t->tm_sec = 0; /* Seconds defaults to 0. */ 252 else { 253 if (strlen(p + 1) != 2) 254 goto terr; 255 *p++ = '\0'; 256 t->tm_sec = ATOI2(p); 257 } 258 259 yearset = 0; 260 switch(strlen(arg)) { 261 case 12: /* CCYYMMDDhhmm */ 262 t->tm_year = ATOI2(arg); 263 t->tm_year *= 100; 264 yearset = 1; 265 /* FALLTHROUGH */ 266 case 10: /* YYMMDDhhmm */ 267 if (yearset) { 268 yearset = ATOI2(arg); 269 t->tm_year += yearset; 270 } else { 271 yearset = ATOI2(arg); 272 if (yearset < 69) 273 t->tm_year = yearset + 2000; 274 else 275 t->tm_year = yearset + 1900; 276 } 277 t->tm_year -= 1900; /* Convert to UNIX time. */ 278 /* FALLTHROUGH */ 279 case 8: /* MMDDhhmm */ 280 t->tm_mon = ATOI2(arg); 281 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 282 t->tm_mday = ATOI2(arg); 283 t->tm_hour = ATOI2(arg); 284 t->tm_min = ATOI2(arg); 285 break; 286 default: 287 goto terr; 288 } 289 290 t->tm_isdst = -1; /* Figure out DST. */ 291 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 292 if (tvp[0].tv_sec == -1) 293 terr: errx(1, 294 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 295 296 tvp[0].tv_usec = tvp[1].tv_usec = 0; 297 } 298 299 void 300 stime_arg2(char *arg, int year, struct timeval *tvp) 301 { 302 time_t now; 303 struct tm *t; 304 /* Start with the current time. */ 305 now = tvp[0].tv_sec; 306 if ((t = localtime(&now)) == NULL) 307 err(1, "localtime"); 308 309 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 310 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 311 t->tm_mday = ATOI2(arg); 312 t->tm_hour = ATOI2(arg); 313 t->tm_min = ATOI2(arg); 314 if (year) { 315 t->tm_year = ATOI2(arg); 316 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 317 t->tm_year += 100; 318 } 319 320 t->tm_isdst = -1; /* Figure out DST. */ 321 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 322 if (tvp[0].tv_sec == -1) 323 errx(1, 324 "out of range or illegal time specification: MMDDhhmm[yy]"); 325 326 tvp[0].tv_usec = tvp[1].tv_usec = 0; 327 } 328 329 void 330 stime_darg(char *arg, struct timeval *tvp) 331 { 332 struct tm t = { .tm_sec = 0 }; 333 const char *fmt, *colon; 334 char *p; 335 int val, isutc = 0; 336 337 tvp[0].tv_usec = 0; 338 t.tm_isdst = -1; 339 colon = strchr(arg, ':'); 340 if (colon == NULL || strchr(colon + 1, ':') == NULL) 341 goto bad; 342 fmt = strchr(arg, 'T') != NULL ? "%Y-%m-%dT%H:%M:%S" : 343 "%Y-%m-%d %H:%M:%S"; 344 p = strptime(arg, fmt, &t); 345 if (p == NULL) 346 goto bad; 347 /* POSIX: must have at least one digit after dot */ 348 if ((*p == '.' || *p == ',') && isdigit((unsigned char)p[1])) { 349 p++; 350 val = 100000; 351 while (isdigit((unsigned char)*p)) { 352 tvp[0].tv_usec += val * (*p - '0'); 353 p++; 354 val /= 10; 355 } 356 } 357 if (*p == 'Z') { 358 isutc = 1; 359 p++; 360 } 361 if (*p != '\0') 362 goto bad; 363 364 tvp[0].tv_sec = isutc ? timegm(&t) : mktime(&t); 365 366 tvp[1] = tvp[0]; 367 return; 368 369 bad: 370 errx(1, "out of range or illegal time specification: YYYY-MM-DDThh:mm:SS[.frac][tz]"); 371 } 372 373 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */ 374 int 375 timeoffset(char *arg) 376 { 377 int offset; 378 int isneg; 379 380 offset = 0; 381 isneg = *arg == '-'; 382 if (isneg) 383 arg++; 384 switch (strlen(arg)) { 385 default: /* invalid */ 386 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS"); 387 388 case 6: /* HHMMSS */ 389 offset = ATOI2(arg); 390 /* FALLTHROUGH */ 391 case 4: /* MMSS */ 392 offset = offset * 60 + ATOI2(arg); 393 /* FALLTHROUGH */ 394 case 2: /* SS */ 395 offset = offset * 60 + ATOI2(arg); 396 } 397 if (isneg) 398 return (-offset); 399 else 400 return (offset); 401 } 402 403 void 404 stime_file(char *fname, struct timeval *tvp) 405 { 406 struct stat sb; 407 408 if (stat(fname, &sb)) 409 err(1, "%s", fname); 410 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atim); 411 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtim); 412 } 413 414 void 415 usage(char *myname) 416 { 417 fprintf(stderr, "usage: %s [-A [-][[hh]mm]SS] [-achm] [-r file] " 418 "[-t [[CC]YY]MMDDhhmm[.SS]]\n" 419 " [-d YYYY-MM-DDThh:mm:SS[.frac][tz]] " 420 "file ...\n", myname); 421 exit(1); 422 } 423