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 * @(#) Copyright (c) 1993 The Regents of the University of California. All rights reserved. 34 * @(#)touch.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/touch/touch.c,v 1.11.2.2 2002/07/28 06:52:15 eric Exp $ 36 * $DragonFly: src/usr.bin/touch/touch.c,v 1.2 2003/06/17 04:29:33 dillon Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/stat.h> 41 #include <sys/time.h> 42 43 #include <err.h> 44 #include <errno.h> 45 #include <fcntl.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <time.h> 50 #include <unistd.h> 51 52 int rw __P((char *, struct stat *, int)); 53 void stime_arg1 __P((char *, struct timeval *)); 54 void stime_arg2 __P((char *, int, struct timeval *)); 55 void stime_file __P((char *, struct timeval *)); 56 void usage __P((void)); 57 58 int 59 main(argc, argv) 60 int argc; 61 char *argv[]; 62 { 63 struct stat sb; 64 struct timeval tv[2]; 65 int aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset; 66 char *p; 67 68 aflag = cflag = fflag = mflag = timeset = 0; 69 if (gettimeofday(&tv[0], NULL)) 70 err(1, "gettimeofday"); 71 72 while ((ch = getopt(argc, argv, "acfmr:t:")) != -1) 73 switch(ch) { 74 case 'a': 75 aflag = 1; 76 break; 77 case 'c': 78 cflag = 1; 79 break; 80 case 'f': 81 fflag = 1; 82 break; 83 case 'm': 84 mflag = 1; 85 break; 86 case 'r': 87 timeset = 1; 88 stime_file(optarg, tv); 89 break; 90 case 't': 91 timeset = 1; 92 stime_arg1(optarg, tv); 93 break; 94 case '?': 95 default: 96 usage(); 97 } 98 argc -= optind; 99 argv += optind; 100 101 /* Default is both -a and -m. */ 102 if (aflag == 0 && mflag == 0) 103 aflag = mflag = 1; 104 105 /* 106 * If no -r or -t flag, at least two operands, the first of which 107 * is an 8 or 10 digit number, use the obsolete time specification. 108 */ 109 if (!timeset && argc > 1) { 110 (void)strtol(argv[0], &p, 10); 111 len = p - argv[0]; 112 if (*p == '\0' && (len == 8 || len == 10)) { 113 timeset = 1; 114 stime_arg2(*argv++, len == 10, tv); 115 } 116 } 117 118 /* Otherwise use the current time of day. */ 119 if (!timeset) 120 tv[1] = tv[0]; 121 122 if (*argv == NULL) 123 usage(); 124 125 for (rval = 0; *argv; ++argv) { 126 /* See if the file exists. */ 127 if (stat(*argv, &sb)) { 128 if (!cflag) { 129 /* Create the file. */ 130 fd = open(*argv, 131 O_WRONLY | O_CREAT, DEFFILEMODE); 132 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 133 rval = 1; 134 warn("%s", *argv); 135 continue; 136 } 137 138 /* If using the current time, we're done. */ 139 if (!timeset) 140 continue; 141 } else 142 continue; 143 } 144 145 if (!aflag) 146 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec); 147 if (!mflag) 148 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec); 149 150 /* Try utimes(2). */ 151 if (!utimes(*argv, tv)) 152 continue; 153 154 /* If the user specified a time, nothing else we can do. */ 155 if (timeset) { 156 rval = 1; 157 warn("%s", *argv); 158 } 159 160 /* 161 * System V and POSIX 1003.1 require that a NULL argument 162 * set the access/modification times to the current time. 163 * The permission checks are different, too, in that the 164 * ability to write the file is sufficient. Take a shot. 165 */ 166 if (!utimes(*argv, NULL)) 167 continue; 168 169 /* Try reading/writing. */ 170 if (!S_ISLNK(sb.st_mode) && !S_ISDIR(sb.st_mode) && 171 rw(*argv, &sb, fflag)) 172 rval = 1; 173 else 174 warn("%s", *argv); 175 } 176 exit(rval); 177 } 178 179 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 180 181 void 182 stime_arg1(arg, tvp) 183 char *arg; 184 struct timeval *tvp; 185 { 186 time_t now; 187 struct tm *t; 188 int yearset; 189 char *p; 190 /* Start with the current time. */ 191 now = tvp[0].tv_sec; 192 if ((t = localtime(&now)) == NULL) 193 err(1, "localtime"); 194 /* [[CC]YY]MMDDhhmm[.SS] */ 195 if ((p = strchr(arg, '.')) == NULL) 196 t->tm_sec = 0; /* Seconds defaults to 0. */ 197 else { 198 if (strlen(p + 1) != 2) 199 goto terr; 200 *p++ = '\0'; 201 t->tm_sec = ATOI2(p); 202 } 203 204 yearset = 0; 205 switch(strlen(arg)) { 206 case 12: /* CCYYMMDDhhmm */ 207 t->tm_year = ATOI2(arg); 208 t->tm_year *= 100; 209 yearset = 1; 210 /* FALLTHOUGH */ 211 case 10: /* YYMMDDhhmm */ 212 if (yearset) { 213 yearset = ATOI2(arg); 214 t->tm_year += yearset; 215 } else { 216 yearset = ATOI2(arg); 217 if (yearset < 69) 218 t->tm_year = yearset + 2000; 219 else 220 t->tm_year = yearset + 1900; 221 } 222 t->tm_year -= 1900; /* Convert to UNIX time. */ 223 /* FALLTHROUGH */ 224 case 8: /* MMDDhhmm */ 225 t->tm_mon = ATOI2(arg); 226 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 227 t->tm_mday = ATOI2(arg); 228 t->tm_hour = ATOI2(arg); 229 t->tm_min = ATOI2(arg); 230 break; 231 default: 232 goto terr; 233 } 234 235 t->tm_isdst = -1; /* Figure out DST. */ 236 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 237 if (tvp[0].tv_sec == -1) 238 terr: errx(1, 239 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 240 241 tvp[0].tv_usec = tvp[1].tv_usec = 0; 242 } 243 244 void 245 stime_arg2(arg, year, tvp) 246 char *arg; 247 int year; 248 struct timeval *tvp; 249 { 250 time_t now; 251 struct tm *t; 252 /* Start with the current time. */ 253 now = tvp[0].tv_sec; 254 if ((t = localtime(&now)) == NULL) 255 err(1, "localtime"); 256 257 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 258 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 259 t->tm_mday = ATOI2(arg); 260 t->tm_hour = ATOI2(arg); 261 t->tm_min = ATOI2(arg); 262 if (year) { 263 t->tm_year = ATOI2(arg); 264 if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */ 265 t->tm_year += 100; 266 } 267 268 t->tm_isdst = -1; /* Figure out DST. */ 269 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 270 if (tvp[0].tv_sec == -1) 271 errx(1, 272 "out of range or illegal time specification: MMDDhhmm[yy]"); 273 274 tvp[0].tv_usec = tvp[1].tv_usec = 0; 275 } 276 277 void 278 stime_file(fname, tvp) 279 char *fname; 280 struct timeval *tvp; 281 { 282 struct stat sb; 283 284 if (stat(fname, &sb)) 285 err(1, "%s", fname); 286 TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec); 287 TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec); 288 } 289 290 int 291 rw(fname, sbp, force) 292 char *fname; 293 struct stat *sbp; 294 int force; 295 { 296 int fd, needed_chmod, rval; 297 u_char byte; 298 299 /* Try regular files. */ 300 if (!S_ISREG(sbp->st_mode)) { 301 warnx("%s: %s", fname, strerror(EFTYPE)); 302 return (1); 303 } 304 305 needed_chmod = rval = 0; 306 if ((fd = open(fname, O_RDWR, 0)) == -1) { 307 if (!force || chmod(fname, DEFFILEMODE)) 308 goto err; 309 if ((fd = open(fname, O_RDWR, 0)) == -1) 310 goto err; 311 needed_chmod = 1; 312 } 313 314 if (sbp->st_size != 0) { 315 if (read(fd, &byte, sizeof(byte)) != sizeof(byte)) 316 goto err; 317 if (lseek(fd, (off_t)0, SEEK_SET) == -1) 318 goto err; 319 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) 320 goto err; 321 } else { 322 if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) { 323 err: rval = 1; 324 warn("%s", fname); 325 } else if (ftruncate(fd, (off_t)0)) { 326 rval = 1; 327 warn("%s: file modified", fname); 328 } 329 } 330 331 if (close(fd) && rval != 1) { 332 rval = 1; 333 warn("%s", fname); 334 } 335 if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) { 336 rval = 1; 337 warn("%s: permissions modified", fname); 338 } 339 return (rval); 340 } 341 342 void 343 usage() 344 { 345 (void)fprintf(stderr, "usage: touch [-acfm] [-r file] [-t [[CC]YY]MMDDhhmm[.SS]] file ...\n"); 346 exit(1); 347 } 348