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 <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 void stime_arg1(char *, struct timeval *); 59 void stime_arg2(char *, int, struct timeval *); 60 void stime_file(char *, struct timeval *); 61 int timeoffset(char *); 62 void usage(char *); 63 64 int 65 main(int argc, char *argv[]) 66 { 67 struct stat sb; 68 struct timeval tv[2]; 69 int (*stat_f)(const char *, struct stat *); 70 int (*utimes_f)(const char *, const struct timeval *); 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 stat_f = stat; 78 utimes_f = utimes; 79 if (gettimeofday(&tv[0], NULL)) 80 err(1, "gettimeofday"); 81 82 while ((ch = getopt(argc, argv, "A:acfhmr: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 'f': 94 /* No-op for compatibility. */ 95 break; 96 case 'h': 97 cflag = 1; 98 stat_f = lstat; 99 utimes_f = lutimes; 100 break; 101 case 'm': 102 mflag = 1; 103 break; 104 case 'r': 105 timeset = 1; 106 stime_file(optarg, tv); 107 break; 108 case 't': 109 timeset = 1; 110 stime_arg1(optarg, tv); 111 break; 112 case '?': 113 default: 114 usage(myname); 115 } 116 argc -= optind; 117 argv += optind; 118 119 if (aflag == 0 && mflag == 0) 120 aflag = mflag = 1; 121 122 if (timeset) { 123 if (Aflag) { 124 /* 125 * We're setting the time to an offset from a specified 126 * time. God knows why, but it means that we can set 127 * that time once and for all here. 128 */ 129 if (aflag) 130 tv[0].tv_sec += Aflag; 131 if (mflag) 132 tv[1].tv_sec += Aflag; 133 Aflag = 0; /* done our job */ 134 } 135 } else { 136 /* 137 * If no -r or -t flag, at least two operands, the first of 138 * which is an 8 or 10 digit number, use the obsolete time 139 * specification, otherwise use the current time. 140 */ 141 if (argc > 1) { 142 strtol(argv[0], &p, 10); 143 len = p - argv[0]; 144 if (*p == '\0' && (len == 8 || len == 10)) { 145 timeset = 1; 146 stime_arg2(*argv++, len == 10, tv); 147 } 148 } 149 /* Both times default to the same. */ 150 tv[1] = tv[0]; 151 } 152 153 if (*argv == NULL) 154 usage(myname); 155 156 if (Aflag) 157 cflag = 1; 158 159 for (rval = 0; *argv; ++argv) { 160 /* See if the file exists. */ 161 if (stat_f(*argv, &sb) != 0) { 162 if (errno != ENOENT) { 163 rval = 1; 164 warn("%s", *argv); 165 continue; 166 } 167 if (!cflag) { 168 /* Create the file. */ 169 fd = open(*argv, 170 O_WRONLY | O_CREAT, DEFFILEMODE); 171 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 172 rval = 1; 173 warn("%s", *argv); 174 continue; 175 } 176 177 /* If using the current time, we're done. */ 178 if (!timeset) 179 continue; 180 } else 181 continue; 182 } 183 184 if (!aflag) 185 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim); 186 if (!mflag) 187 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim); 188 189 /* 190 * We're adjusting the times based on the file times, not a 191 * specified time (that gets handled above). 192 */ 193 if (Aflag) { 194 if (aflag) { 195 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atim); 196 tv[0].tv_sec += Aflag; 197 } 198 if (mflag) { 199 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtim); 200 tv[1].tv_sec += Aflag; 201 } 202 } 203 204 /* Try utimes(2). */ 205 if (!utimes_f(*argv, tv)) 206 continue; 207 208 /* If the user specified a time, nothing else we can do. */ 209 if (timeset || Aflag) { 210 rval = 1; 211 warn("%s", *argv); 212 continue; 213 } 214 215 /* 216 * System V and POSIX 1003.1 require that a NULL argument 217 * set the access/modification times to the current time. 218 * The permission checks are different, too, in that the 219 * ability to write the file is sufficient. Take a shot. 220 */ 221 if (!utimes_f(*argv, NULL)) 222 continue; 223 224 rval = 1; 225 warn("%s", *argv); 226 } 227 exit(rval); 228 } 229 230 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 231 232 void 233 stime_arg1(char *arg, struct timeval *tvp) 234 { 235 time_t now; 236 struct tm *t; 237 int yearset; 238 char *p; 239 /* Start with the current time. */ 240 now = tvp[0].tv_sec; 241 if ((t = localtime(&now)) == NULL) 242 err(1, "localtime"); 243 /* [[CC]YY]MMDDhhmm[.SS] */ 244 if ((p = strchr(arg, '.')) == NULL) 245 t->tm_sec = 0; /* Seconds defaults to 0. */ 246 else { 247 if (strlen(p + 1) != 2) 248 goto terr; 249 *p++ = '\0'; 250 t->tm_sec = ATOI2(p); 251 } 252 253 yearset = 0; 254 switch(strlen(arg)) { 255 case 12: /* CCYYMMDDhhmm */ 256 t->tm_year = ATOI2(arg); 257 t->tm_year *= 100; 258 yearset = 1; 259 /* FALLTHROUGH */ 260 case 10: /* YYMMDDhhmm */ 261 if (yearset) { 262 yearset = ATOI2(arg); 263 t->tm_year += yearset; 264 } else { 265 yearset = ATOI2(arg); 266 if (yearset < 69) 267 t->tm_year = yearset + 2000; 268 else 269 t->tm_year = yearset + 1900; 270 } 271 t->tm_year -= 1900; /* Convert to UNIX time. */ 272 /* FALLTHROUGH */ 273 case 8: /* MMDDhhmm */ 274 t->tm_mon = ATOI2(arg); 275 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 276 t->tm_mday = ATOI2(arg); 277 t->tm_hour = ATOI2(arg); 278 t->tm_min = ATOI2(arg); 279 break; 280 default: 281 goto terr; 282 } 283 284 t->tm_isdst = -1; /* Figure out DST. */ 285 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 286 if (tvp[0].tv_sec == -1) 287 terr: errx(1, 288 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 289 290 tvp[0].tv_usec = tvp[1].tv_usec = 0; 291 } 292 293 void 294 stime_arg2(char *arg, int year, struct timeval *tvp) 295 { 296 time_t now; 297 struct tm *t; 298 /* Start with the current time. */ 299 now = tvp[0].tv_sec; 300 if ((t = localtime(&now)) == NULL) 301 err(1, "localtime"); 302 303 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 304 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 305 t->tm_mday = ATOI2(arg); 306 t->tm_hour = ATOI2(arg); 307 t->tm_min = ATOI2(arg); 308 if (year) { 309 t->tm_year = ATOI2(arg); 310 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 311 t->tm_year += 100; 312 } 313 314 t->tm_isdst = -1; /* Figure out DST. */ 315 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 316 if (tvp[0].tv_sec == -1) 317 errx(1, 318 "out of range or illegal time specification: MMDDhhmm[yy]"); 319 320 tvp[0].tv_usec = tvp[1].tv_usec = 0; 321 } 322 323 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */ 324 int 325 timeoffset(char *arg) 326 { 327 int offset; 328 int isneg; 329 330 offset = 0; 331 isneg = *arg == '-'; 332 if (isneg) 333 arg++; 334 switch (strlen(arg)) { 335 default: /* invalid */ 336 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS"); 337 338 case 6: /* HHMMSS */ 339 offset = ATOI2(arg); 340 /* FALLTHROUGH */ 341 case 4: /* MMSS */ 342 offset = offset * 60 + ATOI2(arg); 343 /* FALLTHROUGH */ 344 case 2: /* SS */ 345 offset = offset * 60 + ATOI2(arg); 346 } 347 if (isneg) 348 return (-offset); 349 else 350 return (offset); 351 } 352 353 void 354 stime_file(char *fname, struct timeval *tvp) 355 { 356 struct stat sb; 357 358 if (stat(fname, &sb)) 359 err(1, "%s", fname); 360 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atim); 361 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtim); 362 } 363 364 void 365 usage(char *myname) 366 { 367 fprintf(stderr, "usage:\n" "%s [-A [-][[hh]mm]SS] [-achm] [-r file] " 368 "[-t [[CC]YY]MMDDhhmm[.SS]] file ...\n", myname); 369 exit(1); 370 } 371