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 || fstat(fd, &sb) || close(fd)) { 181 rval = 1; 182 warn("%s", *argv); 183 continue; 184 } 185 186 /* If using the current time, we're done. */ 187 if (!timeset) 188 continue; 189 } else 190 continue; 191 } 192 193 /* 194 * We're adjusting the times based on the file times, not a 195 * specified time (that gets handled above). 196 */ 197 if (Aflag) { 198 if (aflag) { 199 ts[0] = sb.st_atim; 200 ts[0].tv_sec += Aflag; 201 } 202 if (mflag) { 203 ts[1] = sb.st_mtim; 204 ts[1].tv_sec += Aflag; 205 } 206 } 207 208 if (!utimensat(AT_FDCWD, *argv, ts, atflag)) 209 continue; 210 211 rval = 1; 212 warn("%s", *argv); 213 } 214 exit(rval); 215 } 216 217 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 218 219 static void 220 stime_arg1(const char *arg, struct timespec *tvp) 221 { 222 time_t now; 223 struct tm *t; 224 int yearset; 225 char *p; 226 227 now = time(NULL); 228 if ((t = localtime(&now)) == NULL) 229 err(1, "localtime"); 230 /* [[CC]YY]MMDDhhmm[.SS] */ 231 if ((p = strchr(arg, '.')) == NULL) 232 t->tm_sec = 0; /* Seconds defaults to 0. */ 233 else { 234 if (strlen(p + 1) != 2) 235 goto terr; 236 *p++ = '\0'; 237 t->tm_sec = ATOI2(p); 238 } 239 240 yearset = 0; 241 switch(strlen(arg)) { 242 case 12: /* CCYYMMDDhhmm */ 243 t->tm_year = ATOI2(arg); 244 t->tm_year *= 100; 245 yearset = 1; 246 /* FALLTHROUGH */ 247 case 10: /* YYMMDDhhmm */ 248 if (yearset) { 249 yearset = ATOI2(arg); 250 t->tm_year += yearset; 251 } else { 252 yearset = ATOI2(arg); 253 if (yearset < 69) 254 t->tm_year = yearset + 2000; 255 else 256 t->tm_year = yearset + 1900; 257 } 258 t->tm_year -= 1900; /* Convert to UNIX time. */ 259 /* FALLTHROUGH */ 260 case 8: /* MMDDhhmm */ 261 t->tm_mon = ATOI2(arg); 262 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 263 t->tm_mday = ATOI2(arg); 264 t->tm_hour = ATOI2(arg); 265 t->tm_min = ATOI2(arg); 266 break; 267 default: 268 goto terr; 269 } 270 271 t->tm_isdst = -1; /* Figure out DST. */ 272 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 273 if (tvp[0].tv_sec == -1) 274 goto terr; 275 276 tvp[0].tv_nsec = tvp[1].tv_nsec = 0; 277 return; 278 279 terr: 280 errx(1, "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 281 } 282 283 static void 284 stime_arg2(const char *arg, int year, struct timespec *tvp) 285 { 286 time_t now; 287 struct tm *t; 288 289 now = time(NULL); 290 if ((t = localtime(&now)) == NULL) 291 err(1, "localtime"); 292 293 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 294 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 295 t->tm_mday = ATOI2(arg); 296 t->tm_hour = ATOI2(arg); 297 t->tm_min = ATOI2(arg); 298 if (year) { 299 t->tm_year = ATOI2(arg); 300 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 301 t->tm_year += 100; 302 } 303 304 t->tm_isdst = -1; /* Figure out DST. */ 305 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 306 if (tvp[0].tv_sec == -1) 307 errx(1, 308 "out of range or illegal time specification: MMDDhhmm[yy]"); 309 310 tvp[0].tv_nsec = tvp[1].tv_nsec = 0; 311 } 312 313 static void 314 stime_darg(const char *arg, struct timespec *tvp) 315 { 316 struct tm t = { .tm_sec = 0 }; 317 const char *fmt, *colon; 318 char *p; 319 int val, isutc = 0; 320 321 tvp[0].tv_nsec = 0; 322 t.tm_isdst = -1; 323 colon = strchr(arg, ':'); 324 if (colon == NULL || strchr(colon + 1, ':') == NULL) 325 goto bad; 326 fmt = strchr(arg, 'T') != NULL ? "%Y-%m-%dT%H:%M:%S" : 327 "%Y-%m-%d %H:%M:%S"; 328 p = strptime(arg, fmt, &t); 329 if (p == NULL) 330 goto bad; 331 /* POSIX: must have at least one digit after dot */ 332 if ((*p == '.' || *p == ',') && isdigit((unsigned char)p[1])) { 333 p++; 334 val = 100000000; 335 while (isdigit((unsigned char)*p)) { 336 tvp[0].tv_nsec += val * (*p - '0'); 337 p++; 338 val /= 10; 339 } 340 } 341 if (*p == 'Z') { 342 isutc = 1; 343 p++; 344 } 345 if (*p != '\0') 346 goto bad; 347 348 tvp[0].tv_sec = isutc ? timegm(&t) : mktime(&t); 349 350 tvp[1] = tvp[0]; 351 return; 352 353 bad: 354 errx(1, "out of range or illegal time specification: YYYY-MM-DDThh:mm:SS[.frac][tz]"); 355 } 356 357 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */ 358 int 359 timeoffset(const char *arg) 360 { 361 int offset; 362 int isneg; 363 364 offset = 0; 365 isneg = *arg == '-'; 366 if (isneg) 367 arg++; 368 switch (strlen(arg)) { 369 default: /* invalid */ 370 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS"); 371 372 case 6: /* HHMMSS */ 373 offset = ATOI2(arg); 374 /* FALLTHROUGH */ 375 case 4: /* MMSS */ 376 offset = offset * 60 + ATOI2(arg); 377 /* FALLTHROUGH */ 378 case 2: /* SS */ 379 offset = offset * 60 + ATOI2(arg); 380 } 381 if (isneg) 382 return (-offset); 383 else 384 return (offset); 385 } 386 387 static void 388 stime_file(const char *fname, struct timespec *tsp) 389 { 390 struct stat sb; 391 392 if (stat(fname, &sb)) 393 err(1, "%s", fname); 394 tsp[0] = sb.st_atim; 395 tsp[1] = sb.st_mtim; 396 } 397 398 static void 399 usage(const char *myname) 400 { 401 fprintf(stderr, "usage: %s [-A [-][[hh]mm]SS] [-achm] [-r file] " 402 "[-t [[CC]YY]MMDDhhmm[.SS]]\n" 403 " [-d YYYY-MM-DDThh:mm:SS[.frac][tz]] " 404 "file ...\n", myname); 405 exit(1); 406 } 407