touch.c revision 1.24
1 1.24 agc /* $NetBSD: touch.c,v 1.24 2003/08/07 11:16:45 agc 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 1.24 agc * 3. Neither the name of the University nor the names of its contributors 16 1.1 cgd * may be used to endorse or promote products derived from this software 17 1.1 cgd * without specific prior written permission. 18 1.1 cgd * 19 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 1.1 cgd * SUCH DAMAGE. 30 1.1 cgd */ 31 1.1 cgd 32 1.15 lukem #include <sys/cdefs.h> 33 1.1 cgd #ifndef lint 34 1.15 lukem __COPYRIGHT("@(#) Copyright (c) 1993\n\ 35 1.15 lukem The Regents of the University of California. All rights reserved.\n"); 36 1.1 cgd #endif /* not lint */ 37 1.1 cgd 38 1.1 cgd #ifndef lint 39 1.9 jtc #if 0 40 1.11 jtc static char sccsid[] = "@(#)touch.c 8.2 (Berkeley) 4/28/95"; 41 1.9 jtc #endif 42 1.24 agc __RCSID("$NetBSD: touch.c,v 1.24 2003/08/07 11:16:45 agc Exp $"); 43 1.1 cgd #endif /* not lint */ 44 1.1 cgd 45 1.1 cgd #include <sys/types.h> 46 1.1 cgd #include <sys/stat.h> 47 1.2 glass #include <sys/time.h> 48 1.2 glass 49 1.9 jtc #include <err.h> 50 1.2 glass #include <errno.h> 51 1.2 glass #include <fcntl.h> 52 1.1 cgd #include <stdio.h> 53 1.2 glass #include <stdlib.h> 54 1.2 glass #include <string.h> 55 1.8 jtc #include <locale.h> 56 1.2 glass #include <time.h> 57 1.19 mycroft #include <tzfile.h> 58 1.2 glass #include <unistd.h> 59 1.2 glass 60 1.15 lukem int main __P((int, char **)); 61 1.2 glass int rw __P((char *, struct stat *, int)); 62 1.2 glass void stime_arg1 __P((char *, struct timeval *)); 63 1.2 glass void stime_arg2 __P((char *, int, struct timeval *)); 64 1.2 glass void stime_file __P((char *, struct timeval *)); 65 1.2 glass void usage __P((void)); 66 1.1 cgd 67 1.2 glass int 68 1.1 cgd main(argc, argv) 69 1.1 cgd int argc; 70 1.2 glass char *argv[]; 71 1.1 cgd { 72 1.2 glass struct stat sb; 73 1.2 glass struct timeval tv[2]; 74 1.17 fvdl int aflag, cflag, fflag, hflag, mflag, ch, fd, len, rval, timeset; 75 1.2 glass char *p; 76 1.17 fvdl int (*change_file_times) __P((const char *, const struct timeval *)); 77 1.17 fvdl int (*get_file_status) __P((const char *, struct stat *)); 78 1.2 glass 79 1.8 jtc setlocale(LC_ALL, ""); 80 1.8 jtc 81 1.12 enami aflag = cflag = fflag = hflag = mflag = timeset = 0; 82 1.2 glass if (gettimeofday(&tv[0], NULL)) 83 1.2 glass err(1, "gettimeofday"); 84 1.2 glass 85 1.15 lukem while ((ch = getopt(argc, argv, "acfhmr:t:")) != -1) 86 1.2 glass switch(ch) { 87 1.2 glass case 'a': 88 1.2 glass aflag = 1; 89 1.2 glass break; 90 1.1 cgd case 'c': 91 1.2 glass cflag = 1; 92 1.1 cgd break; 93 1.1 cgd case 'f': 94 1.2 glass fflag = 1; 95 1.2 glass break; 96 1.12 enami case 'h': 97 1.12 enami hflag = 1; 98 1.12 enami break; 99 1.2 glass case 'm': 100 1.2 glass mflag = 1; 101 1.2 glass break; 102 1.2 glass case 'r': 103 1.2 glass timeset = 1; 104 1.2 glass stime_file(optarg, tv); 105 1.1 cgd break; 106 1.2 glass case 't': 107 1.2 glass timeset = 1; 108 1.2 glass stime_arg1(optarg, tv); 109 1.2 glass break; 110 1.1 cgd case '?': 111 1.1 cgd default: 112 1.1 cgd usage(); 113 1.1 cgd } 114 1.2 glass argc -= optind; 115 1.2 glass argv += optind; 116 1.2 glass 117 1.2 glass /* Default is both -a and -m. */ 118 1.2 glass if (aflag == 0 && mflag == 0) 119 1.2 glass aflag = mflag = 1; 120 1.2 glass 121 1.17 fvdl if (hflag) { 122 1.12 enami cflag = 1; /* Don't create new file */ 123 1.17 fvdl change_file_times = lutimes; 124 1.17 fvdl get_file_status = lstat; 125 1.17 fvdl } else { 126 1.17 fvdl change_file_times = utimes; 127 1.17 fvdl get_file_status = stat; 128 1.17 fvdl } 129 1.12 enami 130 1.2 glass /* 131 1.2 glass * If no -r or -t flag, at least two operands, the first of which 132 1.2 glass * is an 8 or 10 digit number, use the obsolete time specification. 133 1.2 glass */ 134 1.2 glass if (!timeset && argc > 1) { 135 1.2 glass (void)strtol(argv[0], &p, 10); 136 1.2 glass len = p - argv[0]; 137 1.2 glass if (*p == '\0' && (len == 8 || len == 10)) { 138 1.2 glass timeset = 1; 139 1.9 jtc stime_arg2(*argv++, len == 10, tv); 140 1.2 glass } 141 1.2 glass } 142 1.2 glass 143 1.2 glass /* Otherwise use the current time of day. */ 144 1.2 glass if (!timeset) 145 1.2 glass tv[1] = tv[0]; 146 1.2 glass 147 1.2 glass if (*argv == NULL) 148 1.1 cgd usage(); 149 1.2 glass 150 1.2 glass for (rval = 0; *argv; ++argv) { 151 1.2 glass /* See if the file exists. */ 152 1.22 ross if ((*get_file_status)(*argv, &sb)) { 153 1.2 glass if (!cflag) { 154 1.2 glass /* Create the file. */ 155 1.2 glass fd = open(*argv, 156 1.2 glass O_WRONLY | O_CREAT, DEFFILEMODE); 157 1.2 glass if (fd == -1 || fstat(fd, &sb) || close(fd)) { 158 1.2 glass rval = 1; 159 1.2 glass warn("%s", *argv); 160 1.2 glass continue; 161 1.2 glass } 162 1.2 glass 163 1.2 glass /* If using the current time, we're done. */ 164 1.2 glass if (!timeset) 165 1.2 glass continue; 166 1.2 glass } else 167 1.2 glass continue; 168 1.22 ross } 169 1.2 glass if (!aflag) 170 1.6 mycroft TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec); 171 1.2 glass if (!mflag) 172 1.6 mycroft TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec); 173 1.2 glass 174 1.2 glass /* Try utimes(2). */ 175 1.17 fvdl if (!(*change_file_times)(*argv, tv)) 176 1.2 glass continue; 177 1.2 glass 178 1.2 glass /* If the user specified a time, nothing else we can do. */ 179 1.2 glass if (timeset) { 180 1.2 glass rval = 1; 181 1.2 glass warn("%s", *argv); 182 1.2 glass } 183 1.2 glass 184 1.2 glass /* 185 1.2 glass * System V and POSIX 1003.1 require that a NULL argument 186 1.2 glass * set the access/modification times to the current time. 187 1.2 glass * The permission checks are different, too, in that the 188 1.2 glass * ability to write the file is sufficient. Take a shot. 189 1.2 glass */ 190 1.17 fvdl if (!(*change_file_times)(*argv, NULL)) 191 1.2 glass continue; 192 1.2 glass 193 1.2 glass /* Try reading/writing. */ 194 1.12 enami if (!S_ISLNK(sb.st_mode) && rw(*argv, &sb, fflag)) 195 1.2 glass rval = 1; 196 1.2 glass } 197 1.2 glass exit(rval); 198 1.1 cgd } 199 1.1 cgd 200 1.20 mycroft #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0')) 201 1.2 glass 202 1.2 glass void 203 1.2 glass stime_arg1(arg, tvp) 204 1.2 glass char *arg; 205 1.2 glass struct timeval *tvp; 206 1.1 cgd { 207 1.2 glass struct tm *t; 208 1.10 cgd time_t tmptime; 209 1.2 glass int yearset; 210 1.2 glass char *p; 211 1.2 glass /* Start with the current time. */ 212 1.10 cgd tmptime = tvp[0].tv_sec; 213 1.10 cgd if ((t = localtime(&tmptime)) == NULL) 214 1.2 glass err(1, "localtime"); 215 1.2 glass /* [[CC]YY]MMDDhhmm[.SS] */ 216 1.2 glass if ((p = strchr(arg, '.')) == NULL) 217 1.2 glass t->tm_sec = 0; /* Seconds defaults to 0. */ 218 1.2 glass else { 219 1.2 glass if (strlen(p + 1) != 2) 220 1.2 glass goto terr; 221 1.2 glass *p++ = '\0'; 222 1.2 glass t->tm_sec = ATOI2(p); 223 1.2 glass } 224 1.2 glass 225 1.2 glass yearset = 0; 226 1.20 mycroft switch (strlen(arg)) { 227 1.2 glass case 12: /* CCYYMMDDhhmm */ 228 1.20 mycroft t->tm_year = ATOI2(arg) * 100 - TM_YEAR_BASE; 229 1.2 glass yearset = 1; 230 1.2 glass /* FALLTHOUGH */ 231 1.2 glass case 10: /* YYMMDDhhmm */ 232 1.2 glass if (yearset) { 233 1.20 mycroft t->tm_year += ATOI2(arg); 234 1.2 glass } else { 235 1.2 glass yearset = ATOI2(arg); 236 1.2 glass if (yearset < 69) 237 1.20 mycroft t->tm_year = yearset + 2000 - TM_YEAR_BASE; 238 1.2 glass else 239 1.20 mycroft t->tm_year = yearset + 1900 - TM_YEAR_BASE; 240 1.1 cgd } 241 1.2 glass /* FALLTHROUGH */ 242 1.2 glass case 8: /* MMDDhhmm */ 243 1.2 glass t->tm_mon = ATOI2(arg); 244 1.2 glass --t->tm_mon; /* Convert from 01-12 to 00-11 */ 245 1.20 mycroft /* FALLTHROUGH */ 246 1.20 mycroft case 6: 247 1.2 glass t->tm_mday = ATOI2(arg); 248 1.20 mycroft /* FALLTHROUGH */ 249 1.20 mycroft case 4: 250 1.2 glass t->tm_hour = ATOI2(arg); 251 1.20 mycroft /* FALLTHROUGH */ 252 1.20 mycroft case 2: 253 1.2 glass t->tm_min = ATOI2(arg); 254 1.2 glass break; 255 1.2 glass default: 256 1.2 glass goto terr; 257 1.1 cgd } 258 1.2 glass 259 1.2 glass t->tm_isdst = -1; /* Figure out DST. */ 260 1.2 glass tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 261 1.2 glass if (tvp[0].tv_sec == -1) 262 1.2 glass terr: errx(1, 263 1.2 glass "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 264 1.2 glass 265 1.2 glass tvp[0].tv_usec = tvp[1].tv_usec = 0; 266 1.2 glass } 267 1.2 glass 268 1.2 glass void 269 1.2 glass stime_arg2(arg, year, tvp) 270 1.2 glass char *arg; 271 1.2 glass int year; 272 1.2 glass struct timeval *tvp; 273 1.2 glass { 274 1.2 glass struct tm *t; 275 1.10 cgd time_t tmptime; 276 1.2 glass /* Start with the current time. */ 277 1.10 cgd tmptime = tvp[0].tv_sec; 278 1.10 cgd if ((t = localtime(&tmptime)) == NULL) 279 1.2 glass err(1, "localtime"); 280 1.2 glass 281 1.2 glass t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 282 1.2 glass --t->tm_mon; /* Convert from 01-12 to 00-11 */ 283 1.2 glass t->tm_mday = ATOI2(arg); 284 1.2 glass t->tm_hour = ATOI2(arg); 285 1.2 glass t->tm_min = ATOI2(arg); 286 1.21 mycroft if (year) { 287 1.21 mycroft year = ATOI2(arg); 288 1.21 mycroft if (year < 69) 289 1.21 mycroft t->tm_year = year + 2000 - TM_YEAR_BASE; 290 1.21 mycroft else 291 1.21 mycroft t->tm_year = year + 1900 - TM_YEAR_BASE; 292 1.21 mycroft } 293 1.23 mycroft t->tm_sec = 0; 294 1.2 glass 295 1.2 glass t->tm_isdst = -1; /* Figure out DST. */ 296 1.2 glass tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 297 1.2 glass if (tvp[0].tv_sec == -1) 298 1.2 glass errx(1, 299 1.2 glass "out of range or illegal time specification: MMDDhhmm[yy]"); 300 1.2 glass 301 1.2 glass tvp[0].tv_usec = tvp[1].tv_usec = 0; 302 1.2 glass } 303 1.2 glass 304 1.2 glass void 305 1.2 glass stime_file(fname, tvp) 306 1.2 glass char *fname; 307 1.2 glass struct timeval *tvp; 308 1.2 glass { 309 1.2 glass struct stat sb; 310 1.2 glass 311 1.2 glass if (stat(fname, &sb)) 312 1.2 glass err(1, "%s", fname); 313 1.14 mycroft TIMESPEC_TO_TIMEVAL(&tvp[0], &sb.st_atimespec); 314 1.14 mycroft TIMESPEC_TO_TIMEVAL(&tvp[1], &sb.st_mtimespec); 315 1.1 cgd } 316 1.1 cgd 317 1.2 glass int 318 1.2 glass rw(fname, sbp, force) 319 1.2 glass char *fname; 320 1.2 glass struct stat *sbp; 321 1.2 glass int force; 322 1.2 glass { 323 1.2 glass int fd, needed_chmod, rval; 324 1.2 glass u_char byte; 325 1.2 glass 326 1.2 glass /* Try regular files and directories. */ 327 1.2 glass if (!S_ISREG(sbp->st_mode) && !S_ISDIR(sbp->st_mode)) { 328 1.2 glass warnx("%s: %s", fname, strerror(EFTYPE)); 329 1.2 glass return (1); 330 1.2 glass } 331 1.2 glass 332 1.2 glass needed_chmod = rval = 0; 333 1.2 glass if ((fd = open(fname, O_RDWR, 0)) == -1) { 334 1.2 glass if (!force || chmod(fname, DEFFILEMODE)) 335 1.2 glass goto err; 336 1.2 glass if ((fd = open(fname, O_RDWR, 0)) == -1) 337 1.2 glass goto err; 338 1.2 glass needed_chmod = 1; 339 1.2 glass } 340 1.2 glass 341 1.2 glass if (sbp->st_size != 0) { 342 1.2 glass if (read(fd, &byte, sizeof(byte)) != sizeof(byte)) 343 1.2 glass goto err; 344 1.2 glass if (lseek(fd, (off_t)0, SEEK_SET) == -1) 345 1.2 glass goto err; 346 1.2 glass if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) 347 1.2 glass goto err; 348 1.2 glass } else { 349 1.2 glass if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) { 350 1.2 glass err: rval = 1; 351 1.2 glass warn("%s", fname); 352 1.2 glass } else if (ftruncate(fd, (off_t)0)) { 353 1.2 glass rval = 1; 354 1.2 glass warn("%s: file modified", fname); 355 1.1 cgd } 356 1.2 glass } 357 1.2 glass 358 1.2 glass if (close(fd) && rval != 1) { 359 1.2 glass rval = 1; 360 1.2 glass warn("%s", fname); 361 1.2 glass } 362 1.2 glass if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) { 363 1.2 glass rval = 1; 364 1.2 glass warn("%s: permissions modified", fname); 365 1.2 glass } 366 1.2 glass return (rval); 367 1.1 cgd } 368 1.1 cgd 369 1.9 jtc __dead void 370 1.1 cgd usage() 371 1.1 cgd { 372 1.2 glass (void)fprintf(stderr, 373 1.13 enami "usage: touch [-acfhm] [-r file] [-t time] file ...\n"); 374 1.1 cgd exit(1); 375 1.1 cgd } 376
Indexes created Tue Sep 30 17:09:57 GMT 2025