touch.c revision 1.34
1 /* $NetBSD: touch.c,v 1.34 2024/02/08 02:53:13 kre Exp $ */ 2 3 /* 4 * Copyright (c) 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)touch.c 8.2 (Berkeley) 4/28/95"; 41 #endif 42 __RCSID("$NetBSD: touch.c,v 1.34 2024/02/08 02:53:13 kre Exp $"); 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/stat.h> 47 #include <sys/time.h> 48 49 #include <err.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <locale.h> 56 #include <time.h> 57 #include <tzfile.h> 58 #include <unistd.h> 59 #include <util.h> 60 #include <getopt.h> 61 62 static void stime_arg0(char *, struct timespec *); 63 static void stime_arg1(char *, struct timespec *); 64 static void stime_arg2(char *, int, struct timespec *); 65 static void stime_file(char *, struct timespec *); 66 __dead static void usage(void); 67 68 struct option touch_longopts[] = { 69 { "date", required_argument, 0, 70 'd' }, 71 { "reference", required_argument, 0, 72 'r' }, 73 { NULL, 0, 0, 74 0 }, 75 }; 76 77 int 78 main(int argc, char *argv[]) 79 { 80 struct stat sb; 81 struct timespec ts[2]; 82 int aflag, cflag, hflag, mflag, ch, fd, len, rval, timeset; 83 char *p; 84 int (*change_file_times)(const char *, const struct timespec *); 85 int (*get_file_status)(const char *, struct stat *); 86 87 setlocale(LC_ALL, ""); 88 89 aflag = cflag = hflag = mflag = timeset = 0; 90 if (clock_gettime(CLOCK_REALTIME, &ts[0])) 91 err(1, "clock_gettime"); 92 93 while ((ch = getopt_long(argc, argv, "acd:fhmr:t:", touch_longopts, 94 NULL)) != -1) 95 switch (ch) { 96 case 'a': 97 aflag = 1; 98 break; 99 case 'c': 100 cflag = 1; 101 break; 102 case 'd': 103 timeset = 1; 104 stime_arg0(optarg, ts); 105 break; 106 case 'f': 107 break; 108 case 'h': 109 hflag = 1; 110 break; 111 case 'm': 112 mflag = 1; 113 break; 114 case 'r': 115 timeset = 1; 116 stime_file(optarg, ts); 117 break; 118 case 't': 119 timeset = 1; 120 stime_arg1(optarg, ts); 121 break; 122 case '?': 123 default: 124 usage(); 125 } 126 argc -= optind; 127 argv += optind; 128 129 /* Default is both -a and -m. */ 130 if (aflag == 0 && mflag == 0) 131 aflag = mflag = 1; 132 133 if (hflag) { 134 cflag = 1; /* Don't create new file */ 135 change_file_times = lutimens; 136 get_file_status = lstat; 137 } else { 138 change_file_times = utimens; 139 get_file_status = stat; 140 } 141 142 /* 143 * If no -r or -t flag, at least two operands, the first of which 144 * is an 8 or 10 digit number, use the obsolete time specification. 145 */ 146 if (!timeset && argc > 1) { 147 (void)strtol(argv[0], &p, 10); 148 len = p - argv[0]; 149 if (*p == '\0' && (len == 8 || len == 10)) { 150 timeset = 1; 151 stime_arg2(*argv++, len == 10, ts); 152 } 153 } 154 155 /* Otherwise use the current time of day. */ 156 if (!timeset) 157 ts[1] = ts[0]; 158 159 if (*argv == NULL) 160 usage(); 161 162 for (rval = EXIT_SUCCESS; *argv; ++argv) { 163 /* See if the file exists. */ 164 if ((*get_file_status)(*argv, &sb)) { 165 if (!cflag) { 166 /* Create the file. */ 167 fd = open(*argv, 168 O_WRONLY | O_CREAT, DEFFILEMODE); 169 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 170 rval = EXIT_FAILURE; 171 warn("%s", *argv); 172 continue; 173 } 174 175 /* If using the current time, we're done. */ 176 if (!timeset) 177 continue; 178 } else 179 continue; 180 } 181 if (!aflag) 182 ts[0] = sb.st_atimespec; 183 if (!mflag) 184 ts[1] = sb.st_mtimespec; 185 186 /* Try utimes(2). */ 187 if (!(*change_file_times)(*argv, ts)) 188 continue; 189 190 /* If the user specified a time, nothing else we can do. */ 191 if (timeset) { 192 rval = EXIT_FAILURE; 193 warn("%s", *argv); 194 } 195 196 /* 197 * System V and POSIX 1003.1 require that a NULL argument 198 * set the access/modification times to the current time. 199 * The permission checks are different, too, in that the 200 * ability to write the file is sufficient. Take a shot. 201 */ 202 if (!(*change_file_times)(*argv, NULL)) 203 continue; 204 205 rval = EXIT_FAILURE; 206 warn("%s", *argv); 207 } 208 exit(rval); 209 } 210 211 #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0')) 212 213 static void 214 stime_arg0(char *arg, struct timespec *tsp) 215 { 216 tsp[1].tv_sec = tsp[0].tv_sec = parsedate(arg, NULL, NULL); 217 if (tsp[0].tv_sec == -1) 218 errx(EXIT_FAILURE, "Could not parse `%s'", arg); 219 tsp[0].tv_nsec = tsp[1].tv_nsec = 0; 220 } 221 222 static void 223 stime_arg1(char *arg, struct timespec *tsp) 224 { 225 struct tm *t; 226 time_t tmptime; 227 int yearset; 228 char *p; 229 /* Start with the current time. */ 230 tmptime = tsp[0].tv_sec; 231 if ((t = localtime(&tmptime)) == NULL) 232 err(EXIT_FAILURE, "localtime"); 233 /* [[CC]YY]MMDDhhmm[.SS] */ 234 if ((p = strchr(arg, '.')) == NULL) 235 t->tm_sec = 0; /* Seconds defaults to 0. */ 236 else { 237 if (strlen(p + 1) != 2) 238 goto terr; 239 *p++ = '\0'; 240 t->tm_sec = ATOI2(p); 241 } 242 243 yearset = 0; 244 switch (strlen(arg)) { 245 case 12: /* CCYYMMDDhhmm */ 246 t->tm_year = ATOI2(arg) * 100 - TM_YEAR_BASE; 247 yearset = 1; 248 /* FALLTHROUGH */ 249 case 10: /* YYMMDDhhmm */ 250 if (yearset) { 251 t->tm_year += ATOI2(arg); 252 } else { 253 yearset = ATOI2(arg); 254 if (yearset < 69) 255 t->tm_year = yearset + 2000 - TM_YEAR_BASE; 256 else 257 t->tm_year = yearset + 1900 - TM_YEAR_BASE; 258 } 259 /* FALLTHROUGH */ 260 case 8: /* MMDDhhmm */ 261 t->tm_mon = ATOI2(arg); 262 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 263 /* FALLTHROUGH */ 264 case 6: 265 t->tm_mday = ATOI2(arg); 266 /* FALLTHROUGH */ 267 case 4: 268 t->tm_hour = ATOI2(arg); 269 /* FALLTHROUGH */ 270 case 2: 271 t->tm_min = ATOI2(arg); 272 break; 273 default: 274 goto terr; 275 } 276 277 t->tm_isdst = -1; /* Figure out DST. */ 278 tsp[0].tv_sec = tsp[1].tv_sec = mktime(t); 279 if (tsp[0].tv_sec == -1) 280 terr: errx(EXIT_FAILURE, 281 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 282 283 tsp[0].tv_nsec = tsp[1].tv_nsec = 0; 284 } 285 286 static void 287 stime_arg2(char *arg, int year, struct timespec *tsp) 288 { 289 struct tm *t; 290 time_t tmptime; 291 /* Start with the current time. */ 292 tmptime = tsp[0].tv_sec; 293 if ((t = localtime(&tmptime)) == NULL) 294 err(EXIT_FAILURE, "localtime"); 295 296 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 297 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 298 t->tm_mday = ATOI2(arg); 299 t->tm_hour = ATOI2(arg); 300 t->tm_min = ATOI2(arg); 301 if (year) { 302 year = ATOI2(arg); 303 if (year < 69) 304 t->tm_year = year + 2000 - TM_YEAR_BASE; 305 else 306 t->tm_year = year + 1900 - TM_YEAR_BASE; 307 } 308 t->tm_sec = 0; 309 310 t->tm_isdst = -1; /* Figure out DST. */ 311 tsp[0].tv_sec = tsp[1].tv_sec = mktime(t); 312 if (tsp[0].tv_sec == -1) 313 errx(EXIT_FAILURE, 314 "out of range or illegal time specification: MMDDhhmm[yy]"); 315 316 tsp[0].tv_nsec = tsp[1].tv_nsec = 0; 317 } 318 319 static void 320 stime_file(char *fname, struct timespec *tsp) 321 { 322 struct stat sb; 323 324 if (stat(fname, &sb)) 325 err(1, "%s", fname); 326 tsp[0] = sb.st_atimespec; 327 tsp[1] = sb.st_mtimespec; 328 } 329 330 static void 331 usage(void) 332 { 333 (void)fprintf(stderr, 334 "Usage: %s [-acfhm] [-d|--date datetime] [-r|--reference file]" 335 " [-t time] file ...\n", getprogname()); 336 exit(EXIT_FAILURE); 337 } 338
Indexes created Tue Sep 30 17:09:57 GMT 2025