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 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif 38 39 #ifndef lint 40 static const char sccsid[] = "@(#)touch.c 8.1 (Berkeley) 6/6/93"; 41 #endif 42 43 #include <sys/types.h> 44 #include <sys/stat.h> 45 #include <sys/time.h> 46 47 #include <ctype.h> 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 static void stime_arg1(const char *, struct timespec *); 59 static void stime_arg2(const char *, int, struct timespec *); 60 static void stime_darg(const char *, struct timespec *); 61 static void stime_file(const char *, struct timespec *); 62 static int timeoffset(const char *); 63 static void usage(const char *); 64 65 int 66 main(int argc, char *argv[]) 67 { 68 struct stat sb; 69 struct timespec ts[2]; 70 int atflag; 71 int Aflag, aflag, cflag, mflag, ch, fd, len, rval, timeset; 72 char *p; 73 char *myname; 74 75 myname = basename(argv[0]); 76 Aflag = aflag = cflag = mflag = timeset = 0; 77 atflag = 0; 78 ts[0].tv_sec = ts[1].tv_sec = 0; 79 ts[0].tv_nsec = ts[1].tv_nsec = UTIME_NOW; 80 81 while ((ch = getopt(argc, argv, "A:acd:fhmr:t:")) != -1) 82 switch(ch) { 83 case 'A': 84 Aflag = timeoffset(optarg); 85 break; 86 case 'a': 87 aflag = 1; 88 break; 89 case 'c': 90 cflag = 1; 91 break; 92 case 'd': 93 timeset = 1; 94 stime_darg(optarg, ts); 95 break; 96 case 'f': 97 /* No-op for compatibility. */ 98 break; 99 case 'h': 100 cflag = 1; 101 atflag = AT_SYMLINK_NOFOLLOW; 102 break; 103 case 'm': 104 mflag = 1; 105 break; 106 case 'r': 107 timeset = 1; 108 stime_file(optarg, ts); 109 break; 110 case 't': 111 timeset = 1; 112 stime_arg1(optarg, ts); 113 break; 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 ts[0].tv_sec += Aflag; 132 if (mflag) 133 ts[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, ts); 148 } 149 } 150 /* Both times default to the same. */ 151 ts[1] = ts[0]; 152 } 153 154 if (!aflag) 155 ts[0].tv_nsec = UTIME_OMIT; 156 if (!mflag) 157 ts[1].tv_nsec = UTIME_OMIT; 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 (fstatat(AT_FDCWD, *argv, &sb, atflag) != 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) { 178 rval = 1; 179 warn("%s", *argv); 180 continue; 181 } 182 if (fstat(fd, &sb) < 0) { 183 warn("%s", *argv); 184 rval = 1; 185 } 186 if (close(fd) < 0) { 187 warn("%s", *argv); 188 rval = 1; 189 } 190 191 /* If using the current time, we're done. */ 192 if (!timeset) 193 continue; 194 } else 195 continue; 196 } 197 198 /* 199 * We're adjusting the times based on the file times, not a 200 * specified time (that gets handled above). 201 */ 202 if (Aflag) { 203 if (aflag) { 204 ts[0] = sb.st_atim; 205 ts[0].tv_sec += Aflag; 206 } 207 if (mflag) { 208 ts[1] = sb.st_mtim; 209 ts[1].tv_sec += Aflag; 210 } 211 } 212 213 if (!utimensat(AT_FDCWD, *argv, ts, atflag)) 214 continue; 215 216 rval = 1; 217 warn("%s", *argv); 218 } 219 exit(rval); 220 } 221 222 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 223 224 static void 225 stime_arg1(const char *arg, struct timespec *tvp) 226 { 227 time_t now; 228 struct tm *t; 229 int yearset; 230 char *p; 231 232 now = time(NULL); 233 if ((t = localtime(&now)) == NULL) 234 err(1, "localtime"); 235 /* [[CC]YY]MMDDhhmm[.SS] */ 236 if ((p = strchr(arg, '.')) == NULL) 237 t->tm_sec = 0; /* Seconds defaults to 0. */ 238 else { 239 if (strlen(p + 1) != 2) 240 goto terr; 241 *p++ = '\0'; 242 t->tm_sec = ATOI2(p); 243 } 244 245 yearset = 0; 246 switch (strlen(arg)) { 247 case 12: /* CCYYMMDDhhmm */ 248 t->tm_year = ATOI2(arg); 249 t->tm_year *= 100; 250 yearset = 1; 251 /* FALLTHROUGH */ 252 case 10: /* YYMMDDhhmm */ 253 if (yearset) { 254 yearset = ATOI2(arg); 255 t->tm_year += yearset; 256 } else { 257 yearset = ATOI2(arg); 258 if (yearset < 69) 259 t->tm_year = yearset + 2000; 260 else 261 t->tm_year = yearset + 1900; 262 } 263 t->tm_year -= 1900; /* Convert to UNIX time. */ 264 /* FALLTHROUGH */ 265 case 8: /* MMDDhhmm */ 266 t->tm_mon = ATOI2(arg); 267 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 268 t->tm_mday = ATOI2(arg); 269 t->tm_hour = ATOI2(arg); 270 t->tm_min = ATOI2(arg); 271 break; 272 default: 273 goto terr; 274 } 275 276 t->tm_isdst = -1; /* Figure out DST. */ 277 t->tm_yday = -1; 278 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 279 if (t->tm_yday == -1) 280 goto terr; 281 282 tvp[0].tv_nsec = tvp[1].tv_nsec = 0; 283 return; 284 285 terr: 286 errx(1, "out of range or illegal time specification: " 287 "[[CC]YY]MMDDhhmm[.SS]"); 288 } 289 290 static void 291 stime_arg2(const char *arg, int year, struct timespec *tvp) 292 { 293 time_t now; 294 struct tm *t; 295 296 now = time(NULL); 297 if ((t = localtime(&now)) == NULL) 298 err(1, "localtime"); 299 300 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 301 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 302 t->tm_mday = ATOI2(arg); 303 t->tm_hour = ATOI2(arg); 304 t->tm_min = ATOI2(arg); 305 if (year) { 306 t->tm_year = ATOI2(arg); 307 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 308 t->tm_year += 100; 309 } 310 311 t->tm_isdst = -1; /* Figure out DST. */ 312 t->tm_yday = -1; 313 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 314 if (t->tm_yday == -1) 315 errx(1, "out of range or illegal time specification: " 316 "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 t.tm_yday = -1; 357 tvp[0].tv_sec = isutc ? timegm(&t) : mktime(&t); 358 if (t.tm_yday == -1) 359 goto bad; 360 361 tvp[1] = tvp[0]; 362 return; 363 364 bad: 365 errx(1, "out of range or illegal time specification: " 366 "YYYY-MM-DDThh:mm:SS[.frac][tz]"); 367 } 368 369 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */ 370 int 371 timeoffset(const char *arg) 372 { 373 int offset; 374 int isneg; 375 376 offset = 0; 377 isneg = *arg == '-'; 378 if (isneg) 379 arg++; 380 switch (strlen(arg)) { 381 default: /* invalid */ 382 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS"); 383 384 case 6: /* HHMMSS */ 385 offset = ATOI2(arg); 386 /* FALLTHROUGH */ 387 case 4: /* MMSS */ 388 offset = offset * 60 + ATOI2(arg); 389 /* FALLTHROUGH */ 390 case 2: /* SS */ 391 offset = offset * 60 + ATOI2(arg); 392 } 393 if (isneg) 394 return (-offset); 395 else 396 return (offset); 397 } 398 399 static void 400 stime_file(const char *fname, struct timespec *tsp) 401 { 402 struct stat sb; 403 404 if (stat(fname, &sb)) 405 err(1, "%s", fname); 406 tsp[0] = sb.st_atim; 407 tsp[1] = sb.st_mtim; 408 } 409 410 static void 411 usage(const char *myname) 412 { 413 fprintf(stderr, "usage: %s [-A [-][[hh]mm]SS] [-achm] [-r file] " 414 "[-t [[CC]YY]MMDDhhmm[.SS]]\n" 415 " [-d YYYY-MM-DDThh:mm:SS[.frac][tz]] " 416 "file ...\n", myname); 417 exit(1); 418 } 419