1 /* $NetBSD: touch.c,v 1.30 2011/09/06 18:33:18 joerg 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 1.30 2011/09/06 18:33:18 joerg 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 60 static void stime_arg1(char *, struct timeval *); 61 static void stime_arg2(char *, int, struct timeval *); 62 static void stime_file(char *, struct timeval *); 63 __dead static void usage(void); 64 65 int 66 main(int argc, char *argv[]) 67 { 68 struct stat sb; 69 struct timeval tv[2]; 70 int aflag, cflag, hflag, mflag, ch, fd, len, rval, timeset; 71 char *p; 72 int (*change_file_times)(const char *, const struct timeval *); 73 int (*get_file_status)(const char *, struct stat *); 74 75 setlocale(LC_ALL, ""); 76 77 aflag = cflag = hflag = mflag = timeset = 0; 78 if (gettimeofday(&tv[0], NULL)) 79 err(1, "gettimeofday"); 80 81 while ((ch = getopt(argc, argv, "acfhmr:t:")) != -1) 82 switch(ch) { 83 case 'a': 84 aflag = 1; 85 break; 86 case 'c': 87 cflag = 1; 88 break; 89 case 'f': 90 break; 91 case 'h': 92 hflag = 1; 93 break; 94 case 'm': 95 mflag = 1; 96 break; 97 case 'r': 98 timeset = 1; 99 stime_file(optarg, tv); 100 break; 101 case 't': 102 timeset = 1; 103 stime_arg1(optarg, tv); 104 break; 105 case '?': 106 default: 107 usage(); 108 } 109 argc -= optind; 110 argv += optind; 111 112 /* Default is both -a and -m. */ 113 if (aflag == 0 && mflag == 0) 114 aflag = mflag = 1; 115 116 if (hflag) { 117 cflag = 1; /* Don't create new file */ 118 change_file_times = lutimes; 119 get_file_status = lstat; 120 } else { 121 change_file_times = utimes; 122 get_file_status = stat; 123 } 124 125 /* 126 * If no -r or -t flag, at least two operands, the first of which 127 * is an 8 or 10 digit number, use the obsolete time specification. 128 */ 129 if (!timeset && argc > 1) { 130 (void)strtol(argv[0], &p, 10); 131 len = p - argv[0]; 132 if (*p == '\0' && (len == 8 || len == 10)) { 133 timeset = 1; 134 stime_arg2(*argv++, len == 10, tv); 135 } 136 } 137 138 /* Otherwise use the current time of day. */ 139 if (!timeset) 140 tv[1] = tv[0]; 141 142 if (*argv == NULL) 143 usage(); 144 145 for (rval = 0; *argv; ++argv) { 146 /* See if the file exists. */ 147 if ((*get_file_status)(*argv, &sb)) { 148 if (!cflag) { 149 /* Create the file. */ 150 fd = open(*argv, 151 O_WRONLY | O_CREAT, DEFFILEMODE); 152 if (fd == -1 || fstat(fd, &sb) || close(fd)) { 153 rval = 1; 154 warn("%s", *argv); 155 continue; 156 } 157 158 /* If using the current time, we're done. */ 159 if (!timeset) 160 continue; 161 } else 162 continue; 163 } 164 if (!aflag) 165 TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec); 166 if (!mflag) 167 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec); 168 169 /* Try utimes(2). */ 170 if (!(*change_file_times)(*argv, tv)) 171 continue; 172 173 /* If the user specified a time, nothing else we can do. */ 174 if (timeset) { 175 rval = 1; 176 warn("%s", *argv); 177 } 178 179 /* 180 * System V and POSIX 1003.1 require that a NULL argument 181 * set the access/modification times to the current time. 182 * The permission checks are different, too, in that the 183 * ability to write the file is sufficient. Take a shot. 184 */ 185 if (!(*change_file_times)(*argv, NULL)) 186 continue; 187 188 rval = 1; 189 warn("%s", *argv); 190 } 191 exit(rval); 192 } 193 194 #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0')) 195 196 static void 197 stime_arg1(char *arg, struct timeval *tvp) 198 { 199 struct tm *t; 200 time_t tmptime; 201 int yearset; 202 char *p; 203 /* Start with the current time. */ 204 tmptime = tvp[0].tv_sec; 205 if ((t = localtime(&tmptime)) == NULL) 206 err(1, "localtime"); 207 /* [[CC]YY]MMDDhhmm[.SS] */ 208 if ((p = strchr(arg, '.')) == NULL) 209 t->tm_sec = 0; /* Seconds defaults to 0. */ 210 else { 211 if (strlen(p + 1) != 2) 212 goto terr; 213 *p++ = '\0'; 214 t->tm_sec = ATOI2(p); 215 } 216 217 yearset = 0; 218 switch (strlen(arg)) { 219 case 12: /* CCYYMMDDhhmm */ 220 t->tm_year = ATOI2(arg) * 100 - TM_YEAR_BASE; 221 yearset = 1; 222 /* FALLTHROUGH */ 223 case 10: /* YYMMDDhhmm */ 224 if (yearset) { 225 t->tm_year += ATOI2(arg); 226 } else { 227 yearset = ATOI2(arg); 228 if (yearset < 69) 229 t->tm_year = yearset + 2000 - TM_YEAR_BASE; 230 else 231 t->tm_year = yearset + 1900 - TM_YEAR_BASE; 232 } 233 /* FALLTHROUGH */ 234 case 8: /* MMDDhhmm */ 235 t->tm_mon = ATOI2(arg); 236 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 237 /* FALLTHROUGH */ 238 case 6: 239 t->tm_mday = ATOI2(arg); 240 /* FALLTHROUGH */ 241 case 4: 242 t->tm_hour = ATOI2(arg); 243 /* FALLTHROUGH */ 244 case 2: 245 t->tm_min = ATOI2(arg); 246 break; 247 default: 248 goto terr; 249 } 250 251 t->tm_isdst = -1; /* Figure out DST. */ 252 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 253 if (tvp[0].tv_sec == -1) 254 terr: errx(1, 255 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 256 257 tvp[0].tv_usec = tvp[1].tv_usec = 0; 258 } 259 260 static void 261 stime_arg2(char *arg, int year, struct timeval *tvp) 262 { 263 struct tm *t; 264 time_t tmptime; 265 /* Start with the current time. */ 266 tmptime = tvp[0].tv_sec; 267 if ((t = localtime(&tmptime)) == NULL) 268 err(1, "localtime"); 269 270 t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */ 271 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 272 t->tm_mday = ATOI2(arg); 273 t->tm_hour = ATOI2(arg); 274 t->tm_min = ATOI2(arg); 275 if (year) { 276 year = ATOI2(arg); 277 if (year < 69) 278 t->tm_year = year + 2000 - TM_YEAR_BASE; 279 else 280 t->tm_year = year + 1900 - TM_YEAR_BASE; 281 } 282 t->tm_sec = 0; 283 284 t->tm_isdst = -1; /* Figure out DST. */ 285 tvp[0].tv_sec = tvp[1].tv_sec = mktime(t); 286 if (tvp[0].tv_sec == -1) 287 errx(1, 288 "out of range or illegal time specification: MMDDhhmm[yy]"); 289 290 tvp[0].tv_usec = tvp[1].tv_usec = 0; 291 } 292 293 static void 294 stime_file(char *fname, struct timeval *tvp) 295 { 296 struct stat sb; 297 298 if (stat(fname, &sb)) 299 err(1, "%s", fname); 300 TIMESPEC_TO_TIMEVAL(&tvp[0], &sb.st_atimespec); 301 TIMESPEC_TO_TIMEVAL(&tvp[1], &sb.st_mtimespec); 302 } 303 304 static void 305 usage(void) 306 { 307 (void)fprintf(stderr, 308 "usage: touch [-acfhm] [-r file] [-t time] file ...\n"); 309 exit(1); 310 } 311