mv.c revision 1.42
1 /* $NetBSD: mv.c,v 1.42 2011/08/03 04:11:15 manu Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ken Smith of The State University of New York at Buffalo. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\ 38 The Regents of the University of California. All rights reserved."); 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94"; 44 #else 45 __RCSID("$NetBSD: mv.c,v 1.42 2011/08/03 04:11:15 manu Exp $"); 46 #endif 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 #include <sys/time.h> 51 #include <sys/wait.h> 52 #include <sys/stat.h> 53 #include <sys/extattr.h> 54 55 #include <err.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <grp.h> 59 #include <locale.h> 60 #include <pwd.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 66 #include "pathnames.h" 67 68 int fflg, iflg, vflg; 69 int stdin_ok; 70 71 int copy(char *, char *); 72 int do_move(char *, char *); 73 int fastcopy(char *, char *, struct stat *); 74 void usage(void); 75 int main(int, char *[]); 76 77 int 78 main(int argc, char *argv[]) 79 { 80 int ch, len, rval; 81 char *p, *endp; 82 struct stat sb; 83 char path[MAXPATHLEN + 1]; 84 size_t baselen; 85 86 setprogname(argv[0]); 87 (void)setlocale(LC_ALL, ""); 88 89 while ((ch = getopt(argc, argv, "ifv")) != -1) 90 switch (ch) { 91 case 'i': 92 fflg = 0; 93 iflg = 1; 94 break; 95 case 'f': 96 iflg = 0; 97 fflg = 1; 98 break; 99 case 'v': 100 vflg = 1; 101 break; 102 default: 103 usage(); 104 } 105 argc -= optind; 106 argv += optind; 107 108 if (argc < 2) 109 usage(); 110 111 stdin_ok = isatty(STDIN_FILENO); 112 113 /* 114 * If the stat on the target fails or the target isn't a directory, 115 * try the move. More than 2 arguments is an error in this case. 116 */ 117 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 118 if (argc > 2) 119 usage(); 120 exit(do_move(argv[0], argv[1])); 121 } 122 123 /* It's a directory, move each file into it. */ 124 baselen = strlcpy(path, argv[argc - 1], sizeof(path)); 125 if (baselen >= sizeof(path)) 126 errx(1, "%s: destination pathname too long", argv[argc - 1]); 127 endp = &path[baselen]; 128 if (!baselen || *(endp - 1) != '/') { 129 *endp++ = '/'; 130 ++baselen; 131 } 132 for (rval = 0; --argc; ++argv) { 133 p = *argv + strlen(*argv) - 1; 134 while (*p == '/' && p != *argv) 135 *p-- = '\0'; 136 if ((p = strrchr(*argv, '/')) == NULL) 137 p = *argv; 138 else 139 ++p; 140 141 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) { 142 warnx("%s: destination pathname too long", *argv); 143 rval = 1; 144 } else { 145 memmove(endp, p, len + 1); 146 if (do_move(*argv, path)) 147 rval = 1; 148 } 149 } 150 exit(rval); 151 /* NOTREACHED */ 152 } 153 154 int 155 do_move(char *from, char *to) 156 { 157 struct stat sb; 158 char modep[15]; 159 160 /* 161 * (1) If the destination path exists, the -f option is not specified 162 * and either of the following conditions are true: 163 * 164 * (a) The permissions of the destination path do not permit 165 * writing and the standard input is a terminal. 166 * (b) The -i option is specified. 167 * 168 * the mv utility shall write a prompt to standard error and 169 * read a line from standard input. If the response is not 170 * affirmative, mv shall do nothing more with the current 171 * source file... 172 */ 173 if (!fflg && !access(to, F_OK)) { 174 int ask = 1; 175 int ch; 176 177 if (iflg) { 178 if (access(from, F_OK)) { 179 warn("rename %s", from); 180 return (1); 181 } 182 (void)fprintf(stderr, "overwrite %s? ", to); 183 } else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) { 184 if (access(from, F_OK)) { 185 warn("rename %s", from); 186 return (1); 187 } 188 strmode(sb.st_mode, modep); 189 (void)fprintf(stderr, "override %s%s%s/%s for %s? ", 190 modep + 1, modep[9] == ' ' ? "" : " ", 191 user_from_uid(sb.st_uid, 0), 192 group_from_gid(sb.st_gid, 0), to); 193 } else 194 ask = 0; 195 if (ask) { 196 if ((ch = getchar()) != EOF && ch != '\n') { 197 int ch2; 198 while ((ch2 = getchar()) != EOF && ch2 != '\n') 199 continue; 200 } 201 if (ch != 'y' && ch != 'Y') 202 return (0); 203 } 204 } 205 206 /* 207 * (2) If rename() succeeds, mv shall do nothing more with the 208 * current source file. If it fails for any other reason than 209 * EXDEV, mv shall write a diagnostic message to the standard 210 * error and do nothing more with the current source file. 211 * 212 * (3) If the destination path exists, and it is a file of type 213 * directory and source_file is not a file of type directory, 214 * or it is a file not of type directory, and source file is 215 * a file of type directory, mv shall write a diagnostic 216 * message to standard error, and do nothing more with the 217 * current source file... 218 */ 219 if (!rename(from, to)) { 220 if (vflg) 221 printf("%s -> %s\n", from, to); 222 return (0); 223 } 224 225 if (errno != EXDEV) { 226 warn("rename %s to %s", from, to); 227 return (1); 228 } 229 230 /* 231 * (4) If the destination path exists, mv shall attempt to remove it. 232 * If this fails for any reason, mv shall write a diagnostic 233 * message to the standard error and do nothing more with the 234 * current source file... 235 */ 236 if (!lstat(to, &sb)) { 237 if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) { 238 warn("can't remove %s", to); 239 return (1); 240 } 241 } 242 243 /* 244 * (5) The file hierarchy rooted in source_file shall be duplicated 245 * as a file hierarchy rooted in the destination path... 246 */ 247 if (lstat(from, &sb)) { 248 warn("%s", from); 249 return (1); 250 } 251 252 return (S_ISREG(sb.st_mode) ? 253 fastcopy(from, to, &sb) : copy(from, to)); 254 } 255 256 int 257 fastcopy(char *from, char *to, struct stat *sbp) 258 { 259 struct timeval tval[2]; 260 static blksize_t blen; 261 static char *bp; 262 int nread, from_fd, to_fd; 263 264 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 265 warn("%s", from); 266 return (1); 267 } 268 if ((to_fd = 269 open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) { 270 warn("%s", to); 271 (void)close(from_fd); 272 return (1); 273 } 274 if (!blen && !(bp = malloc(blen = sbp->st_blksize))) { 275 warn(NULL); 276 blen = 0; 277 (void)close(from_fd); 278 (void)close(to_fd); 279 return (1); 280 } 281 while ((nread = read(from_fd, bp, blen)) > 0) 282 if (write(to_fd, bp, nread) != nread) { 283 warn("%s", to); 284 goto err; 285 } 286 if (nread < 0) { 287 warn("%s", from); 288 err: if (unlink(to)) 289 warn("%s: remove", to); 290 (void)close(from_fd); 291 (void)close(to_fd); 292 return (1); 293 } 294 295 if (fcpxattr(from_fd, to_fd) == -1) 296 warn("%s: error copying extended attributes", to); 297 298 (void)close(from_fd); 299 #ifdef BSD4_4 300 TIMESPEC_TO_TIMEVAL(&tval[0], &sbp->st_atimespec); 301 TIMESPEC_TO_TIMEVAL(&tval[1], &sbp->st_mtimespec); 302 #else 303 tval[0].tv_sec = sbp->st_atime; 304 tval[1].tv_sec = sbp->st_mtime; 305 tval[0].tv_usec = 0; 306 tval[1].tv_usec = 0; 307 #endif 308 #ifdef __SVR4 309 if (utimes(to, tval)) 310 #else 311 if (futimes(to_fd, tval)) 312 #endif 313 warn("%s: set times", to); 314 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 315 if (errno != EPERM) 316 warn("%s: set owner/group", to); 317 sbp->st_mode &= ~(S_ISUID | S_ISGID); 318 } 319 if (fchmod(to_fd, sbp->st_mode)) 320 warn("%s: set mode", to); 321 if (fchflags(to_fd, sbp->st_flags) && (errno != EOPNOTSUPP)) 322 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 323 324 if (close(to_fd)) { 325 warn("%s", to); 326 return (1); 327 } 328 329 if (unlink(from)) { 330 warn("%s: remove", from); 331 return (1); 332 } 333 334 if (vflg) 335 printf("%s -> %s\n", from, to); 336 337 return (0); 338 } 339 340 int 341 copy(char *from, char *to) 342 { 343 pid_t pid; 344 int status; 345 346 if ((pid = vfork()) == 0) { 347 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, NULL); 348 warn("%s", _PATH_CP); 349 _exit(1); 350 } 351 if (waitpid(pid, &status, 0) == -1) { 352 warn("%s: waitpid", _PATH_CP); 353 return (1); 354 } 355 if (!WIFEXITED(status)) { 356 warnx("%s: did not terminate normally", _PATH_CP); 357 return (1); 358 } 359 if (WEXITSTATUS(status)) { 360 warnx("%s: terminated with %d (non-zero) status", 361 _PATH_CP, WEXITSTATUS(status)); 362 return (1); 363 } 364 if (!(pid = vfork())) { 365 execl(_PATH_RM, "mv", "-rf", "--", from, NULL); 366 warn("%s", _PATH_RM); 367 _exit(1); 368 } 369 if (waitpid(pid, &status, 0) == -1) { 370 warn("%s: waitpid", _PATH_RM); 371 return (1); 372 } 373 if (!WIFEXITED(status)) { 374 warnx("%s: did not terminate normally", _PATH_RM); 375 return (1); 376 } 377 if (WEXITSTATUS(status)) { 378 warnx("%s: terminated with %d (non-zero) status", 379 _PATH_RM, WEXITSTATUS(status)); 380 return (1); 381 } 382 return (0); 383 } 384 385 void 386 usage(void) 387 { 388 (void)fprintf(stderr, "usage: %s [-fiv] source target\n" 389 " %s [-fiv] source ... directory\n", getprogname(), 390 getprogname()); 391 exit(1); 392 /* NOTREACHED */ 393 } 394
Indexes created Fri Oct 03 17:10:05 GMT 2025