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 timespec *); 60 static void stime_arg2(const char *, int, struct timespec *); 61 static void stime_darg(const char *, struct timespec *); 62 static void stime_file(const char *, struct timespec *); 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 timespec ts[2]; 71 int atflag; 72 int Aflag, aflag, cflag, mflag, ch, fd, len, rval, timeset; 73 char *p; 74 char *myname; 75 76 myname = basename(argv[0]); 77 Aflag = aflag = cflag = mflag = timeset = 0; 78 atflag = 0; 79 ts[0].tv_sec = ts[1].tv_sec = 0; 80 ts[0].tv_nsec = ts[1].tv_nsec = UTIME_NOW; 81 82 while ((ch = getopt(argc, argv, "A:acd:fhmr:t:")) != -1) 83 switch(ch) { 84 case 'A': 85 Aflag = timeoffset(optarg); 86 break; 87 case 'a': 88 aflag = 1; 89 break; 90 case 'c': 91 cflag = 1; 92 break; 93 case 'd': 94 timeset = 1; 95 stime_darg(optarg, ts); 96 break; 97 case 'f': 98 /* No-op for compatibility. */ 99 break; 100 case 'h': 101 cflag = 1; 102 atflag = AT_SYMLINK_NOFOLLOW; 103 break; 104 case 'm': 105 mflag = 1; 106 break; 107 case 'r': 108 timeset = 1; 109 stime_file(optarg, ts); 110 break; 111 case 't': 112 timeset = 1; 113 stime_arg1(optarg, ts); 114 break; 115 default: 116 usage(myname); 117 } 118 argc -= optind; 119 argv += optind; 120 121 if (aflag == 0 && mflag == 0) 122 aflag = mflag = 1; 123 124 if (timeset) { 125 if (Aflag) { 126 /* 127 * We're setting the time to an offset from a specified 128 * time. God knows why, but it means that we can set 129 * that time once and for all here. 130 */ 131 if (aflag) 132 ts[0].tv_sec += Aflag; 133 if (mflag) 134 ts[1].tv_sec += Aflag; 135 Aflag = 0; /* done our job */ 136 } 137 } else { 138 /* 139 * If no -r or -t flag, at least two operands, the first of 140 * which is an 8 or 10 digit number, use the obsolete time 141 * specification, otherwise use the current time. 142 */ 143 if (argc > 1) { 144 strtol(argv[0], &p, 10); 145 len = p - argv[0]; 146 if (*p == '\0' && (len == 8 || len == 10)) { 147 timeset = 1; 148 stime_arg2(*argv++, len == 10, ts); 149 } 150 } 151 /* Both times default to the same. */ 152 ts[1] = ts[0]; 153 } 154 155 if (!aflag) 156 ts[0].tv_nsec = UTIME_OMIT; 157 if (!mflag) 158 ts[1].tv_nsec = UTIME_OMIT; 159 160 if (*argv == NULL) 161 usage(myname); 162 163 if (Aflag) 164 cflag = 1; 165 166 for (rval = 0; *argv; ++argv) { 167 /* See if the file exists. */ 168 if (fstatat(AT_FDCWD, *argv, &sb, atflag) != 0) { 169 if (errno != ENOENT) { 170 rval = 1; 171 warn("%s", *argv); 172 continue; 173 } 174 if (!cflag) { 175 /* Create the file. */ 176 fd = open(*argv, 177 O_WRONLY | O_CREAT, DEFFILEMODE); 178 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 179 rval = 1; 180 warn("%s", *argv); 181 continue; 182 } 183 184 /* If using the current time, we're done. */ 185 if (!timeset) 186 continue; 187 } else 188 continue; 189 } 190 191 /* 192 * We're adjusting the times based on the file times, not a 193 * specified time (that gets handled above). 194 */ 195 if (Aflag) { 196 if (aflag) { 197 ts[0] = sb.st_atim; 198 ts[0].tv_sec += Aflag; 199 } 200 if (mflag) { 201 ts[1] = sb.st_mtim; 202 ts[1].tv_sec += Aflag; 203 } 204 } 205 206 if (!utimensat(AT_FDCWD, *argv, ts, atflag)) 207 continue; 208 209 rval = 1; 210 warn("%s", *argv); 211 } 212 exit(rval); 213 } 214 215 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 216 217 static void 218 stime_arg1(const char *arg, struct timespec *tvp) 219 { 220 time_t now; 221 struct tm *t; 222 int yearset; 223 char *p; 224 225 now = time(NULL); 226 if ((t = localtime(&now)) == NULL) 227 err(1, "localtime"); 228 /* [[CC]YY]MMDDhhmm[.SS] */ 229 if ((p = strchr(arg, '.')) == NULL) 230 t->tm_sec = 0; /* Seconds defaults to 0. */ 231 else { 232 if (strlen(p + 1) != 2) 233 goto terr; 234 *p++ = '\0'; 235 t->tm_sec = ATOI2(p); 236 } 237 238 yearset = 0; 239 switch(strlen(arg)) { 240 case 12: /* CCYYMMDDhhmm */ 241 t->tm_year = ATOI2(arg); 242 t->tm_year *= 100; 243 yearset = 1; 244 /* FALLTHROUGH */ 245 case 10: /* YYMMDDhhmm */ 246 if (yearset) { 247 yearset = ATOI2(arg); 248 t->tm_year += yearset; 249 } else { 250 yearset = ATOI2(arg); 251 if (yearset < 69) 252 t->tm_year = yearset + 2000; 253 else 254 t->tm_year = yearset + 1900; 255 } 256 t->tm_year -= 1900; /* Convert to UNIX time. */ 257 /* FALLTHROUGH */ 258 case 8: /* MMDDhhmm */ 259 t->tm_mon = ATOI2(arg); 260 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 261 t->tm_mday = ATOI2(arg); 262 t->tm_hour = ATOI2(arg); 263 t->tm_min = ATOI2(arg); 264 break; 265 default: 266 goto terr; 267 } 268 269 t->tm_isdst = -1; /* Figure out DST. */ 270 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 271 if (tvp[0].tv_sec == -1) 272 goto terr; 273 274 tvp[0].tv_nsec = tvp[1].tv_nsec = 0; 275 return; 276 277 terr: 278 errx(1, "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 279 } 280 281 static void 282 stime_arg2(const char *arg, int year, struct timespec *tvp) 283 { 284 time_t now; 285 struct tm *t; 286 287 now = time(NULL); 288 if ((t = localtime(&now)) == NULL) 289 err(1, "localtime"); 290 291 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 292 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 293 t->tm_mday = ATOI2(arg); 294 t->tm_hour = ATOI2(arg); 295 t->tm_min = ATOI2(arg); 296 if (year) { 297 t->tm_year = ATOI2(arg); 298 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 299 t->tm_year += 100; 300 } 301 302 t->tm_isdst = -1; /* Figure out DST. */ 303 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 304 if (tvp[0].tv_sec == -1) 305 errx(1, 306 "out of range or illegal time specification: MMDDhhmm[yy]"); 307 308 tvp[0].tv_nsec = tvp[1].tv_nsec = 0; 309 } 310 311 static void 312 stime_darg(const char *arg, struct timespec *tvp) 313 { 314 struct tm t = { .tm_sec = 0 }; 315 const char *fmt, *colon; 316 char *p; 317 int val, isutc = 0; 318 319 tvp[0].tv_nsec = 0; 320 t.tm_isdst = -1; 321 colon = strchr(arg, ':'); 322 if (colon == NULL || strchr(colon + 1, ':') == NULL) 323 goto bad; 324 fmt = strchr(arg, 'T') != NULL ? "%Y-%m-%dT%H:%M:%S" : 325 "%Y-%m-%d %H:%M:%S"; 326 p = strptime(arg, fmt, &t); 327 if (p == NULL) 328 goto bad; 329 /* POSIX: must have at least one digit after dot */ 330 if ((*p == '.' || *p == ',') && isdigit((unsigned char)p[1])) { 331 p++; 332 val = 100000000; 333 while (isdigit((unsigned char)*p)) { 334 tvp[0].tv_nsec += val * (*p - '0'); 335 p++; 336 val /= 10; 337 } 338 } 339 if (*p == 'Z') { 340 isutc = 1; 341 p++; 342 } 343 if (*p != '\0') 344 goto bad; 345 346 tvp[0].tv_sec = isutc ? timegm(&t) : mktime(&t); 347 348 tvp[1] = tvp[0]; 349 return; 350 351 bad: 352 errx(1, "out of range or illegal time specification: YYYY-MM-DDThh:mm:SS[.frac][tz]"); 353 } 354 355 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */ 356 int 357 timeoffset(const char *arg) 358 { 359 int offset; 360 int isneg; 361 362 offset = 0; 363 isneg = *arg == '-'; 364 if (isneg) 365 arg++; 366 switch (strlen(arg)) { 367 default: /* invalid */ 368 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS"); 369 370 case 6: /* HHMMSS */ 371 offset = ATOI2(arg); 372 /* FALLTHROUGH */ 373 case 4: /* MMSS */ 374 offset = offset * 60 + ATOI2(arg); 375 /* FALLTHROUGH */ 376 case 2: /* SS */ 377 offset = offset * 60 + ATOI2(arg); 378 } 379 if (isneg) 380 return (-offset); 381 else 382 return (offset); 383 } 384 385 static void 386 stime_file(const char *fname, struct timespec *tsp) 387 { 388 struct stat sb; 389 390 if (stat(fname, &sb)) 391 err(1, "%s", fname); 392 tsp[0] = sb.st_atim; 393 tsp[1] = sb.st_mtim; 394 } 395 396 static void 397 usage(const char *myname) 398 { 399 fprintf(stderr, "usage: %s [-A [-][[hh]mm]SS] [-achm] [-r file] " 400 "[-t [[CC]YY]MMDDhhmm[.SS]]\n" 401 " [-d YYYY-MM-DDThh:mm:SS[.frac][tz]] " 402 "file ...\n", myname); 403 exit(1); 404 } 405