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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef lint 39 static const char copyright[] = 40 "@(#) Copyright (c) 1993\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42 #endif 43 44 #ifndef lint 45 static const char sccsid[] = "@(#)touch.c 8.1 (Berkeley) 6/6/93"; 46 #endif 47 48 #include <sys/types.h> 49 #include <sys/stat.h> 50 #include <sys/time.h> 51 52 #include <err.h> 53 #include <errno.h> 54 #include <fcntl.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <time.h> 59 #include <unistd.h> 60 61 int rw(char *, struct stat *, int); 62 void stime_arg1(char *, struct timeval *); 63 void stime_arg2(char *, int, struct timeval *); 64 void stime_file(char *, struct timeval *); 65 int timeoffset(char *); 66 void usage(char *); 67 68 int 69 main(int argc, char *argv[]) 70 { 71 struct stat sb; 72 struct timeval tv[2]; 73 int (*stat_f)(const char *, struct stat *); 74 int (*utimes_f)(const char *, const struct timeval *); 75 int Aflag, aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset; 76 char *p; 77 char *myname; 78 79 myname = argv[0]; 80 Aflag = aflag = cflag = fflag = mflag = timeset = 0; 81 stat_f = stat; 82 utimes_f = utimes; 83 if (gettimeofday(&tv[0], NULL)) 84 err(1, "gettimeofday"); 85 86 while ((ch = getopt(argc, argv, "A:acfhmr:t:")) != -1) 87 switch(ch) { 88 case 'A': 89 Aflag = timeoffset(optarg); 90 break; 91 case 'a': 92 aflag = 1; 93 break; 94 case 'c': 95 cflag = 1; 96 break; 97 case 'f': 98 fflag = 1; 99 break; 100 case 'h': 101 cflag = 1; 102 stat_f = lstat; 103 utimes_f = lutimes; 104 break; 105 case 'm': 106 mflag = 1; 107 break; 108 case 'r': 109 timeset = 1; 110 stime_file(optarg, tv); 111 break; 112 case 't': 113 timeset = 1; 114 stime_arg1(optarg, tv); 115 break; 116 case '?': 117 default: 118 usage(myname); 119 } 120 argc -= optind; 121 argv += optind; 122 123 /* -a and -m are default unless one of them or -A is set. */ 124 if (aflag == 0 && mflag == 0 && Aflag == 0) 125 aflag = mflag = 1; 126 127 /* 128 * If no -r or -t flag, at least two operands, the first of which 129 * is an 8 or 10 digit number, use the obsolete time specification. 130 */ 131 if (!timeset && argc > 1) { 132 (void)strtol(argv[0], &p, 10); 133 len = p - argv[0]; 134 if (*p == '\0' && (len == 8 || len == 10)) { 135 timeset = 1; 136 stime_arg2(*argv++, len == 10, tv); 137 } 138 } 139 140 /* Otherwise use the current time of day. */ 141 if (!timeset) 142 tv[1] = tv[0]; 143 144 if (*argv == NULL) 145 usage(myname); 146 147 for (rval = 0; *argv; ++argv) { 148 /* See if the file exists. */ 149 if (stat_f(*argv, &sb) != 0) { 150 if (!cflag) { 151 /* Create the file. */ 152 fd = open(*argv, 153 O_WRONLY | O_CREAT, DEFFILEMODE); 154 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 155 rval = 1; 156 warn("%s", *argv); 157 continue; 158 } 159 160 /* If using the current time, we're done. */ 161 if (!timeset) 162 continue; 163 } else 164 continue; 165 } 166 167 /* If -a or -m are not set, base time on current file time. */ 168 if (!aflag) 169 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec); 170 if (!mflag) 171 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec); 172 if (Aflag) { 173 tv[0].tv_sec += Aflag; 174 tv[1].tv_sec += Aflag; 175 } 176 177 /* Try utimes(2). */ 178 if (!utimes_f(*argv, tv)) 179 continue; 180 181 /* If the user specified a time, nothing else we can do. */ 182 if (timeset) { 183 rval = 1; 184 warn("%s", *argv); 185 continue; 186 } 187 188 /* 189 * System V and POSIX 1003.1 require that a NULL argument 190 * set the access/modification times to the current time. 191 * The permission checks are different, too, in that the 192 * ability to write the file is sufficient. Take a shot. 193 */ 194 if (!utimes_f(*argv, NULL)) 195 continue; 196 197 /* Try reading/writing. */ 198 if (!S_ISLNK(sb.st_mode) && !S_ISDIR(sb.st_mode) && 199 rw(*argv, &sb, fflag)) 200 rval = 1; 201 else 202 warn("%s", *argv); 203 } 204 exit(rval); 205 } 206 207 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 208 209 void 210 stime_arg1(char *arg, struct timeval *tvp) 211 { 212 time_t now; 213 struct tm *t; 214 int yearset; 215 char *p; 216 /* Start with the current time. */ 217 now = tvp[0].tv_sec; 218 if ((t = localtime(&now)) == NULL) 219 err(1, "localtime"); 220 /* [[CC]YY]MMDDhhmm[.SS] */ 221 if ((p = strchr(arg, '.')) == NULL) 222 t->tm_sec = 0; /* Seconds defaults to 0. */ 223 else { 224 if (strlen(p + 1) != 2) 225 goto terr; 226 *p++ = '\0'; 227 t->tm_sec = ATOI2(p); 228 } 229 230 yearset = 0; 231 switch(strlen(arg)) { 232 case 12: /* CCYYMMDDhhmm */ 233 t->tm_year = ATOI2(arg); 234 t->tm_year *= 100; 235 yearset = 1; 236 /* FALLTHROUGH */ 237 case 10: /* YYMMDDhhmm */ 238 if (yearset) { 239 yearset = ATOI2(arg); 240 t->tm_year += yearset; 241 } else { 242 yearset = ATOI2(arg); 243 if (yearset < 69) 244 t->tm_year = yearset + 2000; 245 else 246 t->tm_year = yearset + 1900; 247 } 248 t->tm_year -= 1900; /* Convert to UNIX time. */ 249 /* FALLTHROUGH */ 250 case 8: /* MMDDhhmm */ 251 t->tm_mon = ATOI2(arg); 252 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 253 t->tm_mday = ATOI2(arg); 254 t->tm_hour = ATOI2(arg); 255 t->tm_min = ATOI2(arg); 256 break; 257 default: 258 goto terr; 259 } 260 261 t->tm_isdst = -1; /* Figure out DST. */ 262 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 263 if (tvp[0].tv_sec == -1) 264 terr: errx(1, 265 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 266 267 tvp[0].tv_usec = tvp[1].tv_usec = 0; 268 } 269 270 void 271 stime_arg2(char *arg, int year, struct timeval *tvp) 272 { 273 time_t now; 274 struct tm *t; 275 /* Start with the current time. */ 276 now = tvp[0].tv_sec; 277 if ((t = localtime(&now)) == NULL) 278 err(1, "localtime"); 279 280 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 281 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 282 t->tm_mday = ATOI2(arg); 283 t->tm_hour = ATOI2(arg); 284 t->tm_min = ATOI2(arg); 285 if (year) { 286 t->tm_year = ATOI2(arg); 287 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 288 t->tm_year += 100; 289 } 290 291 t->tm_isdst = -1; /* Figure out DST. */ 292 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 293 if (tvp[0].tv_sec == -1) 294 errx(1, 295 "out of range or illegal time specification: MMDDhhmm[yy]"); 296 297 tvp[0].tv_usec = tvp[1].tv_usec = 0; 298 } 299 300 /* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */ 301 int 302 timeoffset(char *arg) 303 { 304 int offset; 305 int isneg; 306 307 offset = 0; 308 isneg = *arg == '-'; 309 if (isneg) 310 arg++; 311 switch (strlen(arg)) { 312 default: /* invalid */ 313 errx(1, "Invalid offset spec, must be [-][[HH]MM]SS"); 314 315 case 6: /* HHMMSS */ 316 offset = ATOI2(arg); 317 /* FALLTHROUGH */ 318 case 4: /* MMSS */ 319 offset = offset * 60 + ATOI2(arg); 320 /* FALLTHROUGH */ 321 case 2: /* SS */ 322 offset = offset * 60 + ATOI2(arg); 323 } 324 if (isneg) 325 return (-offset); 326 else 327 return (offset); 328 } 329 330 void 331 stime_file(char *fname, struct timeval *tvp) 332 { 333 struct stat sb; 334 335 if (stat(fname, &sb)) 336 err(1, "%s", fname); 337 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec); 338 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec); 339 } 340 341 int 342 rw(char *fname, struct stat *sbp, int force) 343 { 344 int fd, needed_chmod, rval; 345 u_char byte; 346 347 /* Try regular files. */ 348 if (!S_ISREG(sbp->st_mode)) { 349 warnx("%s: %s", fname, strerror(EFTYPE)); 350 return (1); 351 } 352 353 needed_chmod = rval = 0; 354 if ((fd = open(fname, O_RDWR, 0)) == -1) { 355 if (!force || chmod(fname, DEFFILEMODE)) 356 goto err; 357 if ((fd = open(fname, O_RDWR, 0)) == -1) 358 goto err; 359 needed_chmod = 1; 360 } 361 362 if (sbp->st_size != 0) { 363 if (read(fd, &byte, sizeof(byte)) != sizeof(byte)) 364 goto err; 365 if (lseek(fd, (off_t)0, SEEK_SET) == -1) 366 goto err; 367 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) 368 goto err; 369 } else { 370 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) { 371 err: rval = 1; 372 warn("%s", fname); 373 } else if (ftruncate(fd, (off_t)0)) { 374 rval = 1; 375 warn("%s: file modified", fname); 376 } 377 } 378 379 if (close(fd) && rval != 1) { 380 rval = 1; 381 warn("%s", fname); 382 } 383 if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) { 384 rval = 1; 385 warn("%s: permissions modified", fname); 386 } 387 return (rval); 388 } 389 390 void 391 usage(char *myname) 392 { 393 fprintf(stderr, "usage:\n" "%s [-A [-][[hh]mm]SS] [-acfhm] [-r file] " 394 "[-t [[CC]YY]MMDDhhmm[.SS]] file ...\n", myname); 395 exit(1); 396 } 397