touch.c revision 1.13
1 1.13 enami /* $NetBSD: touch.c,v 1.13 1997/10/11 03:12:17 enami Exp $ */ 2 1.9 jtc 3 1.1 cgd /* 4 1.9 jtc * Copyright (c) 1993 5 1.9 jtc * The Regents of the University of California. All rights reserved. 6 1.1 cgd * 7 1.1 cgd * Redistribution and use in source and binary forms, with or without 8 1.1 cgd * modification, are permitted provided that the following conditions 9 1.1 cgd * are met: 10 1.1 cgd * 1. Redistributions of source code must retain the above copyright 11 1.1 cgd * notice, this list of conditions and the following disclaimer. 12 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 cgd * notice, this list of conditions and the following disclaimer in the 14 1.1 cgd * documentation and/or other materials provided with the distribution. 15 1.1 cgd * 3. All advertising materials mentioning features or use of this software 16 1.1 cgd * must display the following acknowledgement: 17 1.1 cgd * This product includes software developed by the University of 18 1.1 cgd * California, Berkeley and its contributors. 19 1.1 cgd * 4. Neither the name of the University nor the names of its contributors 20 1.1 cgd * may be used to endorse or promote products derived from this software 21 1.1 cgd * without specific prior written permission. 22 1.1 cgd * 23 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 1.1 cgd * SUCH DAMAGE. 34 1.1 cgd */ 35 1.1 cgd 36 1.1 cgd #ifndef lint 37 1.9 jtc static char copyright[] = 38 1.9 jtc "@(#) Copyright (c) 1993\n\ 39 1.9 jtc The Regents of the University of California. All rights reserved.\n"; 40 1.1 cgd #endif /* not lint */ 41 1.1 cgd 42 1.1 cgd #ifndef lint 43 1.9 jtc #if 0 44 1.11 jtc static char sccsid[] = "@(#)touch.c 8.2 (Berkeley) 4/28/95"; 45 1.9 jtc #endif 46 1.13 enami static char rcsid[] = "$NetBSD: touch.c,v 1.13 1997/10/11 03:12:17 enami Exp $"; 47 1.1 cgd #endif /* not lint */ 48 1.1 cgd 49 1.1 cgd #include <sys/types.h> 50 1.1 cgd #include <sys/stat.h> 51 1.2 glass #include <sys/time.h> 52 1.2 glass 53 1.9 jtc #include <err.h> 54 1.2 glass #include <errno.h> 55 1.2 glass #include <fcntl.h> 56 1.1 cgd #include <stdio.h> 57 1.2 glass #include <stdlib.h> 58 1.2 glass #include <string.h> 59 1.8 jtc #include <locale.h> 60 1.2 glass #include <time.h> 61 1.2 glass #include <unistd.h> 62 1.2 glass 63 1.2 glass int rw __P((char *, struct stat *, int)); 64 1.2 glass void stime_arg1 __P((char *, struct timeval *)); 65 1.2 glass void stime_arg2 __P((char *, int, struct timeval *)); 66 1.2 glass void stime_file __P((char *, struct timeval *)); 67 1.2 glass void usage __P((void)); 68 1.1 cgd 69 1.2 glass int 70 1.1 cgd main(argc, argv) 71 1.1 cgd int argc; 72 1.2 glass char *argv[]; 73 1.1 cgd { 74 1.2 glass struct stat sb; 75 1.2 glass struct timeval tv[2]; 76 1.12 enami int aflag, cflag, fflag, hflag, mflag, ch, fd, len, rval, timeset; 77 1.2 glass char *p; 78 1.12 enami int (*change_file_times) __P((const char *, const struct timeval *)); 79 1.12 enami int (*get_file_status) __P((const char *, struct stat *)); 80 1.2 glass 81 1.8 jtc setlocale(LC_ALL, ""); 82 1.8 jtc 83 1.12 enami aflag = cflag = fflag = hflag = mflag = timeset = 0; 84 1.2 glass if (gettimeofday(&tv[0], NULL)) 85 1.2 glass err(1, "gettimeofday"); 86 1.2 glass 87 1.12 enami while ((ch = getopt(argc, argv, "acfhmr:t:")) != EOF) 88 1.2 glass switch(ch) { 89 1.2 glass case 'a': 90 1.2 glass aflag = 1; 91 1.2 glass break; 92 1.1 cgd case 'c': 93 1.2 glass cflag = 1; 94 1.1 cgd break; 95 1.1 cgd case 'f': 96 1.2 glass fflag = 1; 97 1.2 glass break; 98 1.12 enami case 'h': 99 1.12 enami hflag = 1; 100 1.12 enami break; 101 1.2 glass case 'm': 102 1.2 glass mflag = 1; 103 1.2 glass break; 104 1.2 glass case 'r': 105 1.2 glass timeset = 1; 106 1.2 glass stime_file(optarg, tv); 107 1.1 cgd break; 108 1.2 glass case 't': 109 1.2 glass timeset = 1; 110 1.2 glass stime_arg1(optarg, tv); 111 1.2 glass break; 112 1.1 cgd case '?': 113 1.1 cgd default: 114 1.1 cgd usage(); 115 1.1 cgd } 116 1.2 glass argc -= optind; 117 1.2 glass argv += optind; 118 1.2 glass 119 1.2 glass /* Default is both -a and -m. */ 120 1.2 glass if (aflag == 0 && mflag == 0) 121 1.2 glass aflag = mflag = 1; 122 1.2 glass 123 1.12 enami if (hflag) { 124 1.12 enami cflag = 1; /* Don't create new file */ 125 1.12 enami change_file_times = lutimes; 126 1.12 enami get_file_status = lstat; 127 1.12 enami } else { 128 1.12 enami change_file_times = utimes; 129 1.12 enami get_file_status = stat; 130 1.12 enami } 131 1.12 enami 132 1.2 glass /* 133 1.2 glass * If no -r or -t flag, at least two operands, the first of which 134 1.2 glass * is an 8 or 10 digit number, use the obsolete time specification. 135 1.2 glass */ 136 1.2 glass if (!timeset && argc > 1) { 137 1.2 glass (void)strtol(argv[0], &p, 10); 138 1.2 glass len = p - argv[0]; 139 1.2 glass if (*p == '\0' && (len == 8 || len == 10)) { 140 1.2 glass timeset = 1; 141 1.9 jtc stime_arg2(*argv++, len == 10, tv); 142 1.2 glass } 143 1.2 glass } 144 1.2 glass 145 1.2 glass /* Otherwise use the current time of day. */ 146 1.2 glass if (!timeset) 147 1.2 glass tv[1] = tv[0]; 148 1.2 glass 149 1.2 glass if (*argv == NULL) 150 1.1 cgd usage(); 151 1.2 glass 152 1.2 glass for (rval = 0; *argv; ++argv) { 153 1.2 glass /* See if the file exists. */ 154 1.12 enami if ((*get_file_status)(*argv, &sb)) 155 1.2 glass if (!cflag) { 156 1.2 glass /* Create the file. */ 157 1.2 glass fd = open(*argv, 158 1.2 glass O_WRONLY | O_CREAT, DEFFILEMODE); 159 1.2 glass if (fd == -1 || fstat(fd, &sb) || close(fd)) { 160 1.2 glass rval = 1; 161 1.2 glass warn("%s", *argv); 162 1.2 glass continue; 163 1.2 glass } 164 1.2 glass 165 1.2 glass /* If using the current time, we're done. */ 166 1.2 glass if (!timeset) 167 1.2 glass continue; 168 1.2 glass } else 169 1.2 glass continue; 170 1.2 glass 171 1.2 glass if (!aflag) 172 1.6 mycroft TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec); 173 1.2 glass if (!mflag) 174 1.6 mycroft TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec); 175 1.2 glass 176 1.2 glass /* Try utimes(2). */ 177 1.12 enami if (!(*change_file_times)(*argv, tv)) 178 1.2 glass continue; 179 1.2 glass 180 1.2 glass /* If the user specified a time, nothing else we can do. */ 181 1.2 glass if (timeset) { 182 1.2 glass rval = 1; 183 1.2 glass warn("%s", *argv); 184 1.2 glass } 185 1.2 glass 186 1.2 glass /* 187 1.2 glass * System V and POSIX 1003.1 require that a NULL argument 188 1.2 glass * set the access/modification times to the current time. 189 1.2 glass * The permission checks are different, too, in that the 190 1.2 glass * ability to write the file is sufficient. Take a shot. 191 1.2 glass */ 192 1.12 enami if (!(*change_file_times)(*argv, NULL)) 193 1.2 glass continue; 194 1.2 glass 195 1.2 glass /* Try reading/writing. */ 196 1.12 enami if (!S_ISLNK(sb.st_mode) && rw(*argv, &sb, fflag)) 197 1.2 glass rval = 1; 198 1.2 glass } 199 1.2 glass exit(rval); 200 1.1 cgd } 201 1.1 cgd 202 1.2 glass #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 203 1.2 glass 204 1.2 glass void 205 1.2 glass stime_arg1(arg, tvp) 206 1.2 glass char *arg; 207 1.2 glass struct timeval *tvp; 208 1.1 cgd { 209 1.2 glass struct tm *t; 210 1.10 cgd time_t tmptime; 211 1.2 glass int yearset; 212 1.2 glass char *p; 213 1.2 glass /* Start with the current time. */ 214 1.10 cgd tmptime = tvp[0].tv_sec; 215 1.10 cgd if ((t = localtime(&tmptime)) == NULL) 216 1.2 glass err(1, "localtime"); 217 1.2 glass /* [[CC]YY]MMDDhhmm[.SS] */ 218 1.2 glass if ((p = strchr(arg, '.')) == NULL) 219 1.2 glass t->tm_sec = 0; /* Seconds defaults to 0. */ 220 1.2 glass else { 221 1.2 glass if (strlen(p + 1) != 2) 222 1.2 glass goto terr; 223 1.2 glass *p++ = '\0'; 224 1.2 glass t->tm_sec = ATOI2(p); 225 1.2 glass } 226 1.2 glass 227 1.2 glass yearset = 0; 228 1.2 glass switch(strlen(arg)) { 229 1.2 glass case 12: /* CCYYMMDDhhmm */ 230 1.2 glass t->tm_year = ATOI2(arg); 231 1.7 cgd t->tm_year *= 100; 232 1.2 glass yearset = 1; 233 1.2 glass /* FALLTHOUGH */ 234 1.2 glass case 10: /* YYMMDDhhmm */ 235 1.2 glass if (yearset) { 236 1.2 glass yearset = ATOI2(arg); 237 1.2 glass t->tm_year += yearset; 238 1.2 glass } else { 239 1.2 glass yearset = ATOI2(arg); 240 1.2 glass if (yearset < 69) 241 1.2 glass t->tm_year = yearset + 2000; 242 1.2 glass else 243 1.2 glass t->tm_year = yearset + 1900; 244 1.1 cgd } 245 1.2 glass t->tm_year -= 1900; /* Convert to UNIX time. */ 246 1.2 glass /* FALLTHROUGH */ 247 1.2 glass case 8: /* MMDDhhmm */ 248 1.2 glass t->tm_mon = ATOI2(arg); 249 1.2 glass --t->tm_mon; /* Convert from 01-12 to 00-11 */ 250 1.2 glass t->tm_mday = ATOI2(arg); 251 1.2 glass t->tm_hour = ATOI2(arg); 252 1.2 glass t->tm_min = ATOI2(arg); 253 1.2 glass break; 254 1.2 glass default: 255 1.2 glass goto terr; 256 1.1 cgd } 257 1.2 glass 258 1.2 glass t->tm_isdst = -1; /* Figure out DST. */ 259 1.2 glass tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 260 1.2 glass if (tvp[0].tv_sec == -1) 261 1.2 glass terr: errx(1, 262 1.2 glass "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 263 1.2 glass 264 1.2 glass tvp[0].tv_usec = tvp[1].tv_usec = 0; 265 1.2 glass } 266 1.2 glass 267 1.2 glass void 268 1.2 glass stime_arg2(arg, year, tvp) 269 1.2 glass char *arg; 270 1.2 glass int year; 271 1.2 glass struct timeval *tvp; 272 1.2 glass { 273 1.2 glass struct tm *t; 274 1.10 cgd time_t tmptime; 275 1.2 glass /* Start with the current time. */ 276 1.10 cgd tmptime = tvp[0].tv_sec; 277 1.10 cgd if ((t = localtime(&tmptime)) == NULL) 278 1.2 glass err(1, "localtime"); 279 1.2 glass 280 1.2 glass t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 281 1.2 glass --t->tm_mon; /* Convert from 01-12 to 00-11 */ 282 1.2 glass t->tm_mday = ATOI2(arg); 283 1.2 glass t->tm_hour = ATOI2(arg); 284 1.2 glass t->tm_min = ATOI2(arg); 285 1.2 glass if (year) 286 1.2 glass t->tm_year = ATOI2(arg); 287 1.2 glass 288 1.2 glass t->tm_isdst = -1; /* Figure out DST. */ 289 1.2 glass tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 290 1.2 glass if (tvp[0].tv_sec == -1) 291 1.2 glass errx(1, 292 1.2 glass "out of range or illegal time specification: MMDDhhmm[yy]"); 293 1.2 glass 294 1.2 glass tvp[0].tv_usec = tvp[1].tv_usec = 0; 295 1.2 glass } 296 1.2 glass 297 1.2 glass void 298 1.2 glass stime_file(fname, tvp) 299 1.2 glass char *fname; 300 1.2 glass struct timeval *tvp; 301 1.2 glass { 302 1.2 glass struct stat sb; 303 1.2 glass 304 1.2 glass if (stat(fname, &sb)) 305 1.2 glass err(1, "%s", fname); 306 1.6 mycroft TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec); 307 1.6 mycroft TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec); 308 1.1 cgd } 309 1.1 cgd 310 1.2 glass int 311 1.2 glass rw(fname, sbp, force) 312 1.2 glass char *fname; 313 1.2 glass struct stat *sbp; 314 1.2 glass int force; 315 1.2 glass { 316 1.2 glass int fd, needed_chmod, rval; 317 1.2 glass u_char byte; 318 1.2 glass 319 1.2 glass /* Try regular files and directories. */ 320 1.2 glass if (!S_ISREG(sbp->st_mode) && !S_ISDIR(sbp->st_mode)) { 321 1.2 glass warnx("%s: %s", fname, strerror(EFTYPE)); 322 1.2 glass return (1); 323 1.2 glass } 324 1.2 glass 325 1.2 glass needed_chmod = rval = 0; 326 1.2 glass if ((fd = open(fname, O_RDWR, 0)) == -1) { 327 1.2 glass if (!force || chmod(fname, DEFFILEMODE)) 328 1.2 glass goto err; 329 1.2 glass if ((fd = open(fname, O_RDWR, 0)) == -1) 330 1.2 glass goto err; 331 1.2 glass needed_chmod = 1; 332 1.2 glass } 333 1.2 glass 334 1.2 glass if (sbp->st_size != 0) { 335 1.2 glass if (read(fd, &byte, sizeof(byte)) != sizeof(byte)) 336 1.2 glass goto err; 337 1.2 glass if (lseek(fd, (off_t)0, SEEK_SET) == -1) 338 1.2 glass goto err; 339 1.2 glass if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) 340 1.2 glass goto err; 341 1.2 glass } else { 342 1.2 glass if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) { 343 1.2 glass err: rval = 1; 344 1.2 glass warn("%s", fname); 345 1.2 glass } else if (ftruncate(fd, (off_t)0)) { 346 1.2 glass rval = 1; 347 1.2 glass warn("%s: file modified", fname); 348 1.1 cgd } 349 1.2 glass } 350 1.2 glass 351 1.2 glass if (close(fd) && rval != 1) { 352 1.2 glass rval = 1; 353 1.2 glass warn("%s", fname); 354 1.2 glass } 355 1.2 glass if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) { 356 1.2 glass rval = 1; 357 1.2 glass warn("%s: permissions modified", fname); 358 1.2 glass } 359 1.2 glass return (rval); 360 1.1 cgd } 361 1.1 cgd 362 1.9 jtc __dead void 363 1.1 cgd usage() 364 1.1 cgd { 365 1.2 glass (void)fprintf(stderr, 366 1.13 enami "usage: touch [-acfhm] [-r file] [-t time] file ...\n"); 367 1.1 cgd exit(1); 368 1.1 cgd } 369
Indexes created Tue Sep 30 17:09:57 GMT 2025