1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 34 __FBSDID("$FreeBSD$"); 35 36 #ifndef lint 37 static const char copyright[] = 38 "@(#) Copyright (c) 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif 41 42 #ifndef lint 43 static const char sccsid[] = "@(#)touch.c 8.1 (Berkeley) 6/6/93"; 44 #endif 45 46 #include <sys/types.h> 47 #include <sys/stat.h> 48 #include <sys/time.h> 49 50 #include <ctype.h> 51 #include <err.h> 52 #include <errno.h> 53 #include <fcntl.h> 54 #include <libgen.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <time.h> 59 #include <unistd.h> 60 61 static void stime_arg1(const char *, struct timespec *); 62 static void stime_arg2(const char *, int, struct timespec *); 63 static void stime_darg(const char *, struct timespec *); 64 static void stime_file(const char *, struct timespec *); 65 static int timeoffset(const char *); 66 static void usage(const char *); 67 68 int 69 main(int argc, char *argv[]) 70 { 71 struct stat sb; 72 struct timespec ts[2]; 73 int atflag; 74 int Aflag, aflag, cflag, mflag, ch, fd, len, rval, timeset; 75 char *p; 76 char *myname; 77 78 myname = basename(argv[0]); 79 Aflag = aflag = cflag = mflag = timeset = 0; 80 atflag = 0; 81 ts[0].tv_sec = ts[1].tv_sec = 0; 82 ts[0].tv_nsec = ts[1].tv_nsec = UTIME_NOW; 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, ts); 98 break; 99 case 'f': 100 /* No-op for compatibility. */ 101 break; 102 case 'h': 103 cflag = 1; 104 atflag = AT_SYMLINK_NOFOLLOW; 105 break; 106 case 'm': 107 mflag = 1; 108 break; 109 case 'r': 110 timeset = 1; 111 stime_file(optarg, ts); 112 break; 113 case 't': 114 timeset = 1; 115 stime_arg1(optarg, ts); 116 break; 117 default: 118 usage(myname); 119 } 120 argc -= optind; 121 argv += optind; 122 123 if (aflag == 0 && mflag == 0) 124 aflag = mflag = 1; 125 126 if (timeset) { 127 if (Aflag) { 128 /* 129 * We're setting the time to an offset from a specified 130 * time. God knows why, but it means that we can set 131 * that time once and for all here. 132 */ 133 if (aflag) 134 ts[0].tv_sec += Aflag; 135 if (mflag) 136 ts[1].tv_sec += Aflag; 137 Aflag = 0; /* done our job */ 138 } 139 } else { 140 /* 141 * If no -r or -t flag, at least two operands, the first of 142 * which is an 8 or 10 digit number, use the obsolete time 143 * specification, otherwise use the current time. 144 */ 145 if (argc > 1) { 146 strtol(argv[0], &p, 10); 147 len = p - argv[0]; 148 if (*p == '\0' && (len == 8 || len == 10)) { 149 timeset = 1; 150 stime_arg2(*argv++, len == 10, ts); 151 } 152 } 153 /* Both times default to the same. */ 154 ts[1] = ts[0]; 155 } 156 157 if (!aflag) 158 ts[0].tv_nsec = UTIME_OMIT; 159 if (!mflag) 160 ts[1].tv_nsec = UTIME_OMIT; 161 162 if (*argv == NULL) 163 usage(myname); 164 165 if (Aflag) 166 cflag = 1; 167 168 for (rval = 0; *argv; ++argv) { 169 /* See if the file exists. */ 170 if (fstatat(AT_FDCWD, *argv, &sb, atflag) != 0) { 171 if (errno != ENOENT) { 172 rval = 1; 173 warn("%s", *argv); 174 continue; 175 } 176 if (!cflag) { 177 /* Create the file. */ 178 fd = open(*argv, 179 O_WRONLY | O_CREAT, DEFFILEMODE); 180 if (fd == -1) { 181 rval = 1; 182 warn("%s", *argv); 183 continue; 184 } 185 if (fstat(fd, &sb) < 0) { 186 warn("%s", *argv); 187 rval = 1; 188 } 189 if (close(fd) < 0) { 190 warn("%s", *argv); 191 rval = 1; 192 } 193 194 /* If using the current time, we're done. */ 195 if (!timeset) 196 continue; 197 } else 198 continue; 199 } 200 201 /* 202 * We're adjusting the times based on the file times, not a 203 * specified time (that gets handled above). 204 */ 205 if (Aflag) { 206 if (aflag) { 207 ts[0] = sb.st_atim; 208 ts[0].tv_sec += Aflag; 209 } 210 if (mflag) { 211 ts[1] = sb.st_mtim; 212 ts[1].tv_sec += Aflag; 213 } 214 } 215 216 if (!utimensat(AT_FDCWD, *argv, ts, atflag)) 217 continue; 218 219 rval = 1; 220 warn("%s", *argv); 221 } 222 exit(rval); 223 } 224 225 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 226 227 static void 228 stime_arg1(const char *arg, struct timespec *tvp) 229 { 230 time_t now; 231 struct tm *t; 232 int yearset; 233 char *p; 234 235 now = time(NULL); 236 if ((t = localtime(&now)) == NULL) 237 err(1, "localtime"); 238 /* [[CC]YY]MMDDhhmm[.SS] */ 239 if ((p = strchr(arg, '.')) == NULL) 240 t->tm_sec = 0; /* Seconds defaults to 0. */ 241 else { 242 if (strlen(p + 1) != 2) 243 goto terr; 244 *p++ = '\0'; 245 t->tm_sec = ATOI2(p); 246 } 247 248 yearset = 0; 249 switch(strlen(arg)) { 250 case 12: /* CCYYMMDDhhmm */ 251 t->tm_year = ATOI2(arg); 252 t->tm_year *= 100; 253 yearset = 1; 254 /* FALLTHROUGH */ 255 case 10: /* YYMMDDhhmm */ 256 if (yearset) { 257 yearset = ATOI2(arg); 258 t->tm_year += yearset; 259 } else { 260 yearset = ATOI2(arg); 261 if (yearset < 69) 262 t->tm_year = yearset + 2000; 263 else 264 t->tm_year = yearset + 1900; 265 } 266 t->tm_year -= 1900; /* Convert to UNIX time. */ 267 /* FALLTHROUGH */ 268 case 8: /* MMDDhhmm */ 269 t->tm_mon = ATOI2(arg); 270 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 271 t->tm_mday = ATOI2(arg); 272 t->tm_hour = ATOI2(arg); 273 t->tm_min = ATOI2(arg); 274 break; 275 default: 276 goto terr; 277 } 278 279 t->tm_isdst = -1; /* Figure out DST. */ 280 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 281 if (tvp[0].tv_sec == -1) 282 goto terr; 283 284 tvp[0].tv_nsec = tvp[1].tv_nsec = 0; 285 return; 286 287 terr: 288 errx(1, "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 289 } 290 291 static void 292 stime_arg2(const char *arg, int year, struct timespec *tvp) 293 { 294 time_t now; 295 struct tm *t; 296 297 now = time(NULL); 298 if ((t = localtime(&now)) == NULL) 299 err(1, "localtime"); 300 301 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 302 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 303 t->tm_mday = ATOI2(arg); 304 t->tm_hour = ATOI2(arg); 305 t->tm_min = ATOI2(arg); 306 if (year) { 307 t->tm_year = ATOI2(arg); 308 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 309 t->tm_year += 100; 310 } 311 312 t->tm_isdst = -1; /* Figure out DST. */ 313 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 314 if (tvp[0].tv_sec == -1) 315 errx(1, 316 "out of range or illegal time specification: MMDDhhmm[yy]"); 317 318 tvp[0].tv_nsec = tvp[1].tv_nsec = 0; 319 } 320 321 static void 322 stime_darg(const char *arg, struct timespec *tvp) 323 { 324 struct tm t = { .tm_sec = 0 }; 325 const char *fmt, *colon; 326 char *p; 327 int val, isutc = 0; 328 329 tvp[0].tv_nsec = 0; 330 t.tm_isdst = -1; 331 colon = strchr(arg, ':'); 332 if (colon == NULL || strchr(colon + 1, ':') == NULL) 333 goto bad; 334 fmt = strchr(arg, 'T') != NULL ? "%Y-%m-%dT%H:%M:%S" : 335 "%Y-%m-%d %H:%M:%S"; 336 p = strptime(arg, fmt, &t); 337 if (p == NULL) 338 goto bad; 339 /* POSIX: must have at least one digit after dot */ 340 if ((*p == '.' || *p == ',') && isdigit((unsigned char)p[1])) { 341 p++; 342 val = 100000000; 343 while (isdigit((unsigned char)*p)) { 344 tvp[0].tv_nsec += val * (*p - '0'); 345 p++; 346 val /= 10; 347 } 348 } 349 if (*p == 'Z') { 350 isutc = 1; 351 p++; 352 } 353 if (*p != '\0') 354 goto bad; 355 356 tvp[0].tv_sec = isutc ? timegm(&t) : mktime(&t); 357 358 tvp[1] = tvp[0]; 359 return; 360 361 bad: 362 errx(1, "out of range or illegal time specification: YYYY-MM-DDThh:mm:SS[.frac][tz]"); 363 } 364 365 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */ 366 int 367 timeoffset(const char *arg) 368 { 369 int offset; 370 int isneg; 371 372 offset = 0; 373 isneg = *arg == '-'; 374 if (isneg) 375 arg++; 376 switch (strlen(arg)) { 377 default: /* invalid */ 378 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS"); 379 380 case 6: /* HHMMSS */ 381 offset = ATOI2(arg); 382 /* FALLTHROUGH */ 383 case 4: /* MMSS */ 384 offset = offset * 60 + ATOI2(arg); 385 /* FALLTHROUGH */ 386 case 2: /* SS */ 387 offset = offset * 60 + ATOI2(arg); 388 } 389 if (isneg) 390 return (-offset); 391 else 392 return (offset); 393 } 394 395 static void 396 stime_file(const char *fname, struct timespec *tsp) 397 { 398 struct stat sb; 399 400 if (stat(fname, &sb)) 401 err(1, "%s", fname); 402 tsp[0] = sb.st_atim; 403 tsp[1] = sb.st_mtim; 404 } 405 406 static void 407 usage(const char *myname) 408 { 409 fprintf(stderr, "usage: %s [-A [-][[hh]mm]SS] [-achm] [-r file] " 410 "[-t [[CC]YY]MMDDhhmm[.SS]]\n" 411 " [-d YYYY-MM-DDThh:mm:SS[.frac][tz]] " 412 "file ...\n", myname); 413 exit(1); 414 } 415