touch.c revision 1.10
1 1.10 cgd /* $NetBSD: touch.c,v 1.10 1995/06/07 16:10:22 cgd 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 1.9 jtc static char sccsid[] = "@(#)touch.c 8.1 (Berkeley) 6/6/93"; 45 1.9 jtc #endif 46 1.10 cgd static char rcsid[] = "$NetBSD: touch.c,v 1.10 1995/06/07 16:10:22 cgd 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 1.2 glass int aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset; 77 1.2 glass char *p; 78 1.2 glass 79 1.8 jtc setlocale(LC_ALL, ""); 80 1.8 jtc 81 1.2 glass aflag = cflag = fflag = mflag = timeset = 0; 82 1.2 glass if (gettimeofday(&tv[0], NULL)) 83 1.2 glass err(1, "gettimeofday"); 84 1.2 glass 85 1.2 glass while ((ch = getopt(argc, argv, "acfmr:t:")) != EOF) 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 1.2 glass case 'm': 97 1.2 glass mflag = 1; 98 1.2 glass break; 99 1.2 glass case 'r': 100 1.2 glass timeset = 1; 101 1.2 glass stime_file(optarg, tv); 102 1.1 cgd break; 103 1.2 glass case 't': 104 1.2 glass timeset = 1; 105 1.2 glass stime_arg1(optarg, tv); 106 1.2 glass break; 107 1.1 cgd case '?': 108 1.1 cgd default: 109 1.1 cgd usage(); 110 1.1 cgd } 111 1.2 glass argc -= optind; 112 1.2 glass argv += optind; 113 1.2 glass 114 1.2 glass /* Default is both -a and -m. */ 115 1.2 glass if (aflag == 0 && mflag == 0) 116 1.2 glass aflag = mflag = 1; 117 1.2 glass 118 1.2 glass /* 119 1.2 glass * If no -r or -t flag, at least two operands, the first of which 120 1.2 glass * is an 8 or 10 digit number, use the obsolete time specification. 121 1.2 glass */ 122 1.2 glass if (!timeset && argc > 1) { 123 1.2 glass (void)strtol(argv[0], &p, 10); 124 1.2 glass len = p - argv[0]; 125 1.2 glass if (*p == '\0' && (len == 8 || len == 10)) { 126 1.2 glass timeset = 1; 127 1.9 jtc stime_arg2(*argv++, len == 10, tv); 128 1.2 glass } 129 1.2 glass } 130 1.2 glass 131 1.2 glass /* Otherwise use the current time of day. */ 132 1.2 glass if (!timeset) 133 1.2 glass tv[1] = tv[0]; 134 1.2 glass 135 1.2 glass if (*argv == NULL) 136 1.1 cgd usage(); 137 1.2 glass 138 1.2 glass for (rval = 0; *argv; ++argv) { 139 1.2 glass /* See if the file exists. */ 140 1.2 glass if (stat(*argv, &sb)) 141 1.2 glass if (!cflag) { 142 1.2 glass /* Create the file. */ 143 1.2 glass fd = open(*argv, 144 1.2 glass O_WRONLY | O_CREAT, DEFFILEMODE); 145 1.2 glass if (fd == -1 || fstat(fd, &sb) || close(fd)) { 146 1.2 glass rval = 1; 147 1.2 glass warn("%s", *argv); 148 1.2 glass continue; 149 1.2 glass } 150 1.2 glass 151 1.2 glass /* If using the current time, we're done. */ 152 1.2 glass if (!timeset) 153 1.2 glass continue; 154 1.2 glass } else 155 1.2 glass continue; 156 1.2 glass 157 1.2 glass if (!aflag) 158 1.6 mycroft TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec); 159 1.2 glass if (!mflag) 160 1.6 mycroft TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec); 161 1.2 glass 162 1.2 glass /* Try utimes(2). */ 163 1.2 glass if (!utimes(*argv, tv)) 164 1.2 glass continue; 165 1.2 glass 166 1.2 glass /* If the user specified a time, nothing else we can do. */ 167 1.2 glass if (timeset) { 168 1.2 glass rval = 1; 169 1.2 glass warn("%s", *argv); 170 1.2 glass } 171 1.2 glass 172 1.2 glass /* 173 1.2 glass * System V and POSIX 1003.1 require that a NULL argument 174 1.2 glass * set the access/modification times to the current time. 175 1.2 glass * The permission checks are different, too, in that the 176 1.2 glass * ability to write the file is sufficient. Take a shot. 177 1.2 glass */ 178 1.2 glass if (!utimes(*argv, NULL)) 179 1.2 glass continue; 180 1.2 glass 181 1.2 glass /* Try reading/writing. */ 182 1.2 glass if (rw(*argv, &sb, fflag)) 183 1.2 glass rval = 1; 184 1.2 glass } 185 1.2 glass exit(rval); 186 1.1 cgd } 187 1.1 cgd 188 1.2 glass #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 189 1.2 glass 190 1.2 glass void 191 1.2 glass stime_arg1(arg, tvp) 192 1.2 glass char *arg; 193 1.2 glass struct timeval *tvp; 194 1.1 cgd { 195 1.2 glass struct tm *t; 196 1.10 cgd time_t tmptime; 197 1.2 glass int yearset; 198 1.2 glass char *p; 199 1.2 glass /* Start with the current time. */ 200 1.10 cgd tmptime = tvp[0].tv_sec; 201 1.10 cgd if ((t = localtime(&tmptime)) == NULL) 202 1.2 glass err(1, "localtime"); 203 1.2 glass /* [[CC]YY]MMDDhhmm[.SS] */ 204 1.2 glass if ((p = strchr(arg, '.')) == NULL) 205 1.2 glass t->tm_sec = 0; /* Seconds defaults to 0. */ 206 1.2 glass else { 207 1.2 glass if (strlen(p + 1) != 2) 208 1.2 glass goto terr; 209 1.2 glass *p++ = '\0'; 210 1.2 glass t->tm_sec = ATOI2(p); 211 1.2 glass } 212 1.2 glass 213 1.2 glass yearset = 0; 214 1.2 glass switch(strlen(arg)) { 215 1.2 glass case 12: /* CCYYMMDDhhmm */ 216 1.2 glass t->tm_year = ATOI2(arg); 217 1.7 cgd t->tm_year *= 100; 218 1.2 glass yearset = 1; 219 1.2 glass /* FALLTHOUGH */ 220 1.2 glass case 10: /* YYMMDDhhmm */ 221 1.2 glass if (yearset) { 222 1.2 glass yearset = ATOI2(arg); 223 1.2 glass t->tm_year += yearset; 224 1.2 glass } else { 225 1.2 glass yearset = ATOI2(arg); 226 1.2 glass if (yearset < 69) 227 1.2 glass t->tm_year = yearset + 2000; 228 1.2 glass else 229 1.2 glass t->tm_year = yearset + 1900; 230 1.1 cgd } 231 1.2 glass t->tm_year -= 1900; /* Convert to UNIX time. */ 232 1.2 glass /* FALLTHROUGH */ 233 1.2 glass case 8: /* MMDDhhmm */ 234 1.2 glass t->tm_mon = ATOI2(arg); 235 1.2 glass --t->tm_mon; /* Convert from 01-12 to 00-11 */ 236 1.2 glass t->tm_mday = ATOI2(arg); 237 1.2 glass t->tm_hour = ATOI2(arg); 238 1.2 glass t->tm_min = ATOI2(arg); 239 1.2 glass break; 240 1.2 glass default: 241 1.2 glass goto terr; 242 1.1 cgd } 243 1.2 glass 244 1.2 glass t->tm_isdst = -1; /* Figure out DST. */ 245 1.2 glass tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 246 1.2 glass if (tvp[0].tv_sec == -1) 247 1.2 glass terr: errx(1, 248 1.2 glass "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 249 1.2 glass 250 1.2 glass tvp[0].tv_usec = tvp[1].tv_usec = 0; 251 1.2 glass } 252 1.2 glass 253 1.2 glass void 254 1.2 glass stime_arg2(arg, year, tvp) 255 1.2 glass char *arg; 256 1.2 glass int year; 257 1.2 glass struct timeval *tvp; 258 1.2 glass { 259 1.2 glass struct tm *t; 260 1.10 cgd time_t tmptime; 261 1.2 glass /* Start with the current time. */ 262 1.10 cgd tmptime = tvp[0].tv_sec; 263 1.10 cgd if ((t = localtime(&tmptime)) == NULL) 264 1.2 glass err(1, "localtime"); 265 1.2 glass 266 1.2 glass t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 267 1.2 glass --t->tm_mon; /* Convert from 01-12 to 00-11 */ 268 1.2 glass t->tm_mday = ATOI2(arg); 269 1.2 glass t->tm_hour = ATOI2(arg); 270 1.2 glass t->tm_min = ATOI2(arg); 271 1.2 glass if (year) 272 1.2 glass t->tm_year = ATOI2(arg); 273 1.2 glass 274 1.2 glass t->tm_isdst = -1; /* Figure out DST. */ 275 1.2 glass tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 276 1.2 glass if (tvp[0].tv_sec == -1) 277 1.2 glass errx(1, 278 1.2 glass "out of range or illegal time specification: MMDDhhmm[yy]"); 279 1.2 glass 280 1.2 glass tvp[0].tv_usec = tvp[1].tv_usec = 0; 281 1.2 glass } 282 1.2 glass 283 1.2 glass void 284 1.2 glass stime_file(fname, tvp) 285 1.2 glass char *fname; 286 1.2 glass struct timeval *tvp; 287 1.2 glass { 288 1.2 glass struct stat sb; 289 1.2 glass 290 1.2 glass if (stat(fname, &sb)) 291 1.2 glass err(1, "%s", fname); 292 1.6 mycroft TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec); 293 1.6 mycroft TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec); 294 1.1 cgd } 295 1.1 cgd 296 1.2 glass int 297 1.2 glass rw(fname, sbp, force) 298 1.2 glass char *fname; 299 1.2 glass struct stat *sbp; 300 1.2 glass int force; 301 1.2 glass { 302 1.2 glass int fd, needed_chmod, rval; 303 1.2 glass u_char byte; 304 1.2 glass 305 1.2 glass /* Try regular files and directories. */ 306 1.2 glass if (!S_ISREG(sbp->st_mode) && !S_ISDIR(sbp->st_mode)) { 307 1.2 glass warnx("%s: %s", fname, strerror(EFTYPE)); 308 1.2 glass return (1); 309 1.2 glass } 310 1.2 glass 311 1.2 glass needed_chmod = rval = 0; 312 1.2 glass if ((fd = open(fname, O_RDWR, 0)) == -1) { 313 1.2 glass if (!force || chmod(fname, DEFFILEMODE)) 314 1.2 glass goto err; 315 1.2 glass if ((fd = open(fname, O_RDWR, 0)) == -1) 316 1.2 glass goto err; 317 1.2 glass needed_chmod = 1; 318 1.2 glass } 319 1.2 glass 320 1.2 glass if (sbp->st_size != 0) { 321 1.2 glass if (read(fd, &byte, sizeof(byte)) != sizeof(byte)) 322 1.2 glass goto err; 323 1.2 glass if (lseek(fd, (off_t)0, SEEK_SET) == -1) 324 1.2 glass goto err; 325 1.2 glass if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) 326 1.2 glass goto err; 327 1.2 glass } else { 328 1.2 glass if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) { 329 1.2 glass err: rval = 1; 330 1.2 glass warn("%s", fname); 331 1.2 glass } else if (ftruncate(fd, (off_t)0)) { 332 1.2 glass rval = 1; 333 1.2 glass warn("%s: file modified", fname); 334 1.1 cgd } 335 1.2 glass } 336 1.2 glass 337 1.2 glass if (close(fd) && rval != 1) { 338 1.2 glass rval = 1; 339 1.2 glass warn("%s", fname); 340 1.2 glass } 341 1.2 glass if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) { 342 1.2 glass rval = 1; 343 1.2 glass warn("%s: permissions modified", fname); 344 1.2 glass } 345 1.2 glass return (rval); 346 1.1 cgd } 347 1.1 cgd 348 1.9 jtc __dead void 349 1.1 cgd usage() 350 1.1 cgd { 351 1.2 glass (void)fprintf(stderr, 352 1.2 glass "usage: touch [-acfm] [-r file] [-t time] file ...\n"); 353 1.1 cgd exit(1); 354 1.1 cgd } 355
Indexes created Tue Sep 30 17:09:57 GMT 2025