touch.c revision 1.28.2.1
1 1.28.2.1 bouyer /* $NetBSD: touch.c,v 1.28.2.1 2011/03/05 15:11:01 bouyer 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 1.27 lukem __COPYRIGHT("@(#) Copyright (c) 1993\ 35 1.27 lukem The Regents of the University of California. All rights reserved."); 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 1.28.2.1 bouyer __RCSID("$NetBSD: touch.c,v 1.28.2.1 2011/03/05 15:11:01 bouyer 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 1.28.2.1 bouyer int aflag, cflag, 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 1.28.2.1 bouyer aflag = cflag = 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 break; 95 1.12 enami case 'h': 96 1.12 enami hflag = 1; 97 1.12 enami break; 98 1.2 glass case 'm': 99 1.2 glass mflag = 1; 100 1.2 glass break; 101 1.2 glass case 'r': 102 1.2 glass timeset = 1; 103 1.2 glass stime_file(optarg, tv); 104 1.1 cgd break; 105 1.2 glass case 't': 106 1.2 glass timeset = 1; 107 1.2 glass stime_arg1(optarg, tv); 108 1.2 glass break; 109 1.1 cgd case '?': 110 1.1 cgd default: 111 1.1 cgd usage(); 112 1.1 cgd } 113 1.2 glass argc -= optind; 114 1.2 glass argv += optind; 115 1.2 glass 116 1.2 glass /* Default is both -a and -m. */ 117 1.2 glass if (aflag == 0 && mflag == 0) 118 1.2 glass aflag = mflag = 1; 119 1.2 glass 120 1.17 fvdl if (hflag) { 121 1.12 enami cflag = 1; /* Don't create new file */ 122 1.17 fvdl change_file_times = lutimes; 123 1.17 fvdl get_file_status = lstat; 124 1.17 fvdl } else { 125 1.17 fvdl change_file_times = utimes; 126 1.17 fvdl get_file_status = stat; 127 1.17 fvdl } 128 1.12 enami 129 1.2 glass /* 130 1.2 glass * If no -r or -t flag, at least two operands, the first of which 131 1.2 glass * is an 8 or 10 digit number, use the obsolete time specification. 132 1.2 glass */ 133 1.2 glass if (!timeset && argc > 1) { 134 1.2 glass (void)strtol(argv[0], &p, 10); 135 1.2 glass len = p - argv[0]; 136 1.2 glass if (*p == '\0' && (len == 8 || len == 10)) { 137 1.2 glass timeset = 1; 138 1.9 jtc stime_arg2(*argv++, len == 10, tv); 139 1.2 glass } 140 1.2 glass } 141 1.2 glass 142 1.2 glass /* Otherwise use the current time of day. */ 143 1.2 glass if (!timeset) 144 1.2 glass tv[1] = tv[0]; 145 1.2 glass 146 1.2 glass if (*argv == NULL) 147 1.1 cgd usage(); 148 1.2 glass 149 1.2 glass for (rval = 0; *argv; ++argv) { 150 1.2 glass /* See if the file exists. */ 151 1.22 ross if ((*get_file_status)(*argv, &sb)) { 152 1.2 glass if (!cflag) { 153 1.2 glass /* Create the file. */ 154 1.2 glass fd = open(*argv, 155 1.2 glass O_WRONLY | O_CREAT, DEFFILEMODE); 156 1.2 glass if (fd == -1 || fstat(fd, &sb) || close(fd)) { 157 1.2 glass rval = 1; 158 1.2 glass warn("%s", *argv); 159 1.2 glass continue; 160 1.2 glass } 161 1.2 glass 162 1.2 glass /* If using the current time, we're done. */ 163 1.2 glass if (!timeset) 164 1.2 glass continue; 165 1.2 glass } else 166 1.2 glass continue; 167 1.22 ross } 168 1.2 glass if (!aflag) 169 1.6 mycroft TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec); 170 1.2 glass if (!mflag) 171 1.6 mycroft TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec); 172 1.2 glass 173 1.2 glass /* Try utimes(2). */ 174 1.17 fvdl if (!(*change_file_times)(*argv, tv)) 175 1.2 glass continue; 176 1.2 glass 177 1.2 glass /* If the user specified a time, nothing else we can do. */ 178 1.2 glass if (timeset) { 179 1.2 glass rval = 1; 180 1.2 glass warn("%s", *argv); 181 1.2 glass } 182 1.2 glass 183 1.2 glass /* 184 1.2 glass * System V and POSIX 1003.1 require that a NULL argument 185 1.2 glass * set the access/modification times to the current time. 186 1.2 glass * The permission checks are different, too, in that the 187 1.2 glass * ability to write the file is sufficient. Take a shot. 188 1.2 glass */ 189 1.17 fvdl if (!(*change_file_times)(*argv, NULL)) 190 1.2 glass continue; 191 1.2 glass 192 1.28 yamt rval = 1; 193 1.28 yamt warn("%s", *argv); 194 1.2 glass } 195 1.2 glass exit(rval); 196 1.1 cgd } 197 1.1 cgd 198 1.20 mycroft #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0')) 199 1.2 glass 200 1.2 glass void 201 1.2 glass stime_arg1(arg, tvp) 202 1.2 glass char *arg; 203 1.2 glass struct timeval *tvp; 204 1.1 cgd { 205 1.2 glass struct tm *t; 206 1.10 cgd time_t tmptime; 207 1.2 glass int yearset; 208 1.2 glass char *p; 209 1.2 glass /* Start with the current time. */ 210 1.10 cgd tmptime = tvp[0].tv_sec; 211 1.10 cgd if ((t = localtime(&tmptime)) == NULL) 212 1.2 glass err(1, "localtime"); 213 1.2 glass /* [[CC]YY]MMDDhhmm[.SS] */ 214 1.2 glass if ((p = strchr(arg, '.')) == NULL) 215 1.2 glass t->tm_sec = 0; /* Seconds defaults to 0. */ 216 1.2 glass else { 217 1.2 glass if (strlen(p + 1) != 2) 218 1.2 glass goto terr; 219 1.2 glass *p++ = '\0'; 220 1.2 glass t->tm_sec = ATOI2(p); 221 1.2 glass } 222 1.2 glass 223 1.2 glass yearset = 0; 224 1.20 mycroft switch (strlen(arg)) { 225 1.2 glass case 12: /* CCYYMMDDhhmm */ 226 1.20 mycroft t->tm_year = ATOI2(arg) * 100 - TM_YEAR_BASE; 227 1.2 glass yearset = 1; 228 1.25 tsutsui /* FALLTHROUGH */ 229 1.2 glass case 10: /* YYMMDDhhmm */ 230 1.2 glass if (yearset) { 231 1.20 mycroft t->tm_year += ATOI2(arg); 232 1.2 glass } else { 233 1.2 glass yearset = ATOI2(arg); 234 1.2 glass if (yearset < 69) 235 1.20 mycroft t->tm_year = yearset + 2000 - TM_YEAR_BASE; 236 1.2 glass else 237 1.20 mycroft t->tm_year = yearset + 1900 - TM_YEAR_BASE; 238 1.1 cgd } 239 1.2 glass /* FALLTHROUGH */ 240 1.2 glass case 8: /* MMDDhhmm */ 241 1.2 glass t->tm_mon = ATOI2(arg); 242 1.2 glass --t->tm_mon; /* Convert from 01-12 to 00-11 */ 243 1.20 mycroft /* FALLTHROUGH */ 244 1.20 mycroft case 6: 245 1.2 glass t->tm_mday = ATOI2(arg); 246 1.20 mycroft /* FALLTHROUGH */ 247 1.20 mycroft case 4: 248 1.2 glass t->tm_hour = ATOI2(arg); 249 1.20 mycroft /* FALLTHROUGH */ 250 1.20 mycroft case 2: 251 1.2 glass t->tm_min = ATOI2(arg); 252 1.2 glass break; 253 1.2 glass default: 254 1.2 glass goto terr; 255 1.1 cgd } 256 1.2 glass 257 1.2 glass t->tm_isdst = -1; /* Figure out DST. */ 258 1.2 glass tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 259 1.2 glass if (tvp[0].tv_sec == -1) 260 1.2 glass terr: errx(1, 261 1.2 glass "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 262 1.2 glass 263 1.2 glass tvp[0].tv_usec = tvp[1].tv_usec = 0; 264 1.2 glass } 265 1.2 glass 266 1.2 glass void 267 1.2 glass stime_arg2(arg, year, tvp) 268 1.2 glass char *arg; 269 1.2 glass int year; 270 1.2 glass struct timeval *tvp; 271 1.2 glass { 272 1.2 glass struct tm *t; 273 1.10 cgd time_t tmptime; 274 1.2 glass /* Start with the current time. */ 275 1.10 cgd tmptime = tvp[0].tv_sec; 276 1.10 cgd if ((t = localtime(&tmptime)) == NULL) 277 1.2 glass err(1, "localtime"); 278 1.2 glass 279 1.2 glass t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 280 1.2 glass --t->tm_mon; /* Convert from 01-12 to 00-11 */ 281 1.2 glass t->tm_mday = ATOI2(arg); 282 1.2 glass t->tm_hour = ATOI2(arg); 283 1.2 glass t->tm_min = ATOI2(arg); 284 1.21 mycroft if (year) { 285 1.21 mycroft year = ATOI2(arg); 286 1.21 mycroft if (year < 69) 287 1.21 mycroft t->tm_year = year + 2000 - TM_YEAR_BASE; 288 1.21 mycroft else 289 1.21 mycroft t->tm_year = year + 1900 - TM_YEAR_BASE; 290 1.21 mycroft } 291 1.23 mycroft t->tm_sec = 0; 292 1.2 glass 293 1.2 glass t->tm_isdst = -1; /* Figure out DST. */ 294 1.2 glass tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 295 1.2 glass if (tvp[0].tv_sec == -1) 296 1.2 glass errx(1, 297 1.2 glass "out of range or illegal time specification: MMDDhhmm[yy]"); 298 1.2 glass 299 1.2 glass tvp[0].tv_usec = tvp[1].tv_usec = 0; 300 1.2 glass } 301 1.2 glass 302 1.2 glass void 303 1.2 glass stime_file(fname, tvp) 304 1.2 glass char *fname; 305 1.2 glass struct timeval *tvp; 306 1.2 glass { 307 1.2 glass struct stat sb; 308 1.2 glass 309 1.2 glass if (stat(fname, &sb)) 310 1.2 glass err(1, "%s", fname); 311 1.14 mycroft TIMESPEC_TO_TIMEVAL(&tvp[0], &sb.st_atimespec); 312 1.14 mycroft TIMESPEC_TO_TIMEVAL(&tvp[1], &sb.st_mtimespec); 313 1.1 cgd } 314 1.1 cgd 315 1.9 jtc __dead void 316 1.1 cgd usage() 317 1.1 cgd { 318 1.2 glass (void)fprintf(stderr, 319 1.13 enami "usage: touch [-acfhm] [-r file] [-t time] file ...\n"); 320 1.1 cgd exit(1); 321 1.1 cgd } 322
Indexes created Fri Oct 03 02:09:57 GMT 2025