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 * 3. 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 * @(#) Copyright (c) 1993 The Regents of the University of California. All rights reserved. 30 * @(#)touch.c 8.1 (Berkeley) 6/6/93 31 * $FreeBSD: src/usr.bin/touch/touch.c,v 1.29 2012/11/17 01:54:31 svnexp Exp $ 32 */ 33 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 #include <sys/time.h> 37 38 #include <ctype.h> 39 #include <err.h> 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <libgen.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <time.h> 47 #include <unistd.h> 48 49 static void stime_arg1(const char *, struct timeval *); 50 static void stime_arg2(const char *, int, struct timeval *); 51 static void stime_darg(const char *, struct timeval *); 52 static void stime_file(const char *, struct timeval *); 53 static int timeoffset(const char *); 54 static void usage(const char *); 55 56 int 57 main(int argc, char *argv[]) 58 { 59 struct stat sb; 60 struct timeval tv[2]; 61 int (*stat_f)(const char *, struct stat *); 62 int (*utimes_f)(const char *, const struct timeval *); 63 int Aflag, aflag, cflag, mflag, ch, fd, len, rval, timeset; 64 char *p; 65 char *myname; 66 67 myname = basename(argv[0]); 68 Aflag = aflag = cflag = mflag = timeset = 0; 69 stat_f = stat; 70 utimes_f = utimes; 71 if (gettimeofday(&tv[0], NULL) == -1) 72 err(1, "gettimeofday"); 73 74 while ((ch = getopt(argc, argv, "A:acd:fhmr:t:")) != -1) 75 switch(ch) { 76 case 'A': 77 Aflag = timeoffset(optarg); 78 break; 79 case 'a': 80 aflag = 1; 81 break; 82 case 'c': 83 cflag = 1; 84 break; 85 case 'd': 86 timeset = 1; 87 stime_darg(optarg, tv); 88 break; 89 case 'f': 90 /* No-op for compatibility. */ 91 break; 92 case 'h': 93 cflag = 1; 94 stat_f = lstat; 95 utimes_f = lutimes; 96 break; 97 case 'm': 98 mflag = 1; 99 break; 100 case 'r': 101 timeset = 1; 102 stime_file(optarg, tv); 103 break; 104 case 't': 105 timeset = 1; 106 stime_arg1(optarg, tv); 107 break; 108 default: 109 usage(myname); 110 } 111 argc -= optind; 112 argv += optind; 113 114 if (aflag == 0 && mflag == 0) 115 aflag = mflag = 1; 116 117 if (timeset) { 118 if (Aflag) { 119 /* 120 * We're setting the time to an offset from a specified 121 * time. God knows why, but it means that we can set 122 * that time once and for all here. 123 */ 124 if (aflag) 125 tv[0].tv_sec += Aflag; 126 if (mflag) 127 tv[1].tv_sec += Aflag; 128 Aflag = 0; /* done our job */ 129 } 130 } else { 131 /* 132 * If no -r or -t flag, at least two operands, the first of 133 * which is an 8 or 10 digit number, use the obsolete time 134 * specification, otherwise use the current time. 135 */ 136 if (argc > 1) { 137 strtol(argv[0], &p, 10); 138 len = p - argv[0]; 139 if (*p == '\0' && (len == 8 || len == 10)) { 140 timeset = 1; 141 stime_arg2(*argv++, len == 10, tv); 142 } 143 } 144 /* Both times default to the same. */ 145 tv[1] = tv[0]; 146 } 147 148 if (*argv == NULL) 149 usage(myname); 150 151 if (Aflag) 152 cflag = 1; 153 154 for (rval = 0; *argv; ++argv) { 155 /* See if the file exists. */ 156 if (stat_f(*argv, &sb) != 0) { 157 if (errno != ENOENT) { 158 rval = 1; 159 warn("%s", *argv); 160 continue; 161 } 162 if (!cflag) { 163 /* Create the file. */ 164 fd = open(*argv, 165 O_WRONLY | O_CREAT, DEFFILEMODE); 166 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 167 rval = 1; 168 warn("%s", *argv); 169 continue; 170 } 171 172 /* If using the current time, we're done. */ 173 if (!timeset) 174 continue; 175 } else 176 continue; 177 } 178 179 if (!aflag) 180 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim); 181 if (!mflag) 182 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim); 183 184 /* 185 * We're adjusting the times based on the file times, not a 186 * specified time (that gets handled above). 187 */ 188 if (Aflag) { 189 if (aflag) { 190 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim); 191 tv[0].tv_sec += Aflag; 192 } 193 if (mflag) { 194 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim); 195 tv[1].tv_sec += Aflag; 196 } 197 } 198 199 /* Try utimes(2). */ 200 if (!utimes_f(*argv, tv)) 201 continue; 202 203 /* If the user specified a time, nothing else we can do. */ 204 if (timeset || Aflag) { 205 rval = 1; 206 warn("%s", *argv); 207 continue; 208 } 209 210 /* 211 * System V and POSIX 1003.1 require that a NULL argument 212 * set the access/modification times to the current time. 213 * The permission checks are different, too, in that the 214 * ability to write the file is sufficient. Take a shot. 215 */ 216 if (!utimes_f(*argv, NULL)) 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 timeval *tvp) 229 { 230 time_t now; 231 struct tm *t; 232 int yearset; 233 char *p; 234 /* Start with the current time. */ 235 now = tvp[0].tv_sec; 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_usec = tvp[1].tv_usec = 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 timeval *tvp) 293 { 294 time_t now; 295 struct tm *t; 296 /* Start with the current time. */ 297 now = tvp[0].tv_sec; 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_usec = tvp[1].tv_usec = 0; 319 } 320 321 static void 322 stime_darg(const char *arg, struct timeval *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_usec = 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 = 100000; 343 while (isdigit((unsigned char)*p)) { 344 tvp[0].tv_usec += 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 timeval *tvp) 397 { 398 struct stat sb; 399 400 if (stat(fname, &sb)) 401 err(1, "%s", fname); 402 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atim); 403 TIMESPEC_TO_TIMEVAL(tvp + 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