1 /*- 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Ken Smith of The State University of New York at Buffalo. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #if 0 34 #ifndef lint 35 static char const copyright[] = 36 "@(#) Copyright (c) 1989, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94"; 42 #endif /* not lint */ 43 #endif 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 #include <sys/types.h> 48 #include <sys/acl.h> 49 #include <sys/param.h> 50 #include <sys/time.h> 51 #include <sys/wait.h> 52 #include <sys/stat.h> 53 #include <sys/mount.h> 54 55 #include <err.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <grp.h> 59 #include <limits.h> 60 #include <paths.h> 61 #include <pwd.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <sysexits.h> 66 #include <unistd.h> 67 68 int fflg, iflg, nflg, vflg; 69 70 int copy(char *, char *); 71 int do_move(char *, char *); 72 int fastcopy(char *, char *, struct stat *); 73 void usage(void); 74 75 int 76 main(int argc, char *argv[]) 77 { 78 size_t baselen, len; 79 int rval; 80 char *p, *endp; 81 struct stat sb; 82 int ch; 83 char path[PATH_MAX]; 84 85 while ((ch = getopt(argc, argv, "finv")) != -1) 86 switch (ch) { 87 case 'i': 88 iflg = 1; 89 fflg = nflg = 0; 90 break; 91 case 'f': 92 fflg = 1; 93 iflg = nflg = 0; 94 break; 95 case 'n': 96 nflg = 1; 97 fflg = iflg = 0; 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 /* 112 * If the stat on the target fails or the target isn't a directory, 113 * try the move. More than 2 arguments is an error in this case. 114 */ 115 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 116 if (argc > 2) 117 usage(); 118 exit(do_move(argv[0], argv[1])); 119 } 120 121 /* It's a directory, move each file into it. */ 122 if (strlen(argv[argc - 1]) > sizeof(path) - 1) 123 errx(1, "%s: destination pathname too long", *argv); 124 (void)strcpy(path, argv[argc - 1]); 125 baselen = strlen(path); 126 endp = &path[baselen]; 127 if (!baselen || *(endp - 1) != '/') { 128 *endp++ = '/'; 129 ++baselen; 130 } 131 for (rval = 0; --argc; ++argv) { 132 /* 133 * Find the last component of the source pathname. It 134 * may have trailing slashes. 135 */ 136 p = *argv + strlen(*argv); 137 while (p != *argv && p[-1] == '/') 138 --p; 139 while (p != *argv && p[-1] != '/') 140 --p; 141 142 if ((baselen + (len = strlen(p))) >= PATH_MAX) { 143 warnx("%s: destination pathname too long", *argv); 144 rval = 1; 145 } else { 146 memmove(endp, p, (size_t)len + 1); 147 if (do_move(*argv, path)) 148 rval = 1; 149 } 150 } 151 exit(rval); 152 } 153 154 int 155 do_move(char *from, char *to) 156 { 157 struct stat sb; 158 int ask, ch, first; 159 char modep[15]; 160 161 /* 162 * Check access. If interactive and file exists, ask user if it 163 * should be replaced. Otherwise if file exists but isn't writable 164 * make sure the user wants to clobber it. 165 */ 166 if (!fflg && !access(to, F_OK)) { 167 168 /* prompt only if source exist */ 169 if (lstat(from, &sb) == -1) { 170 warn("%s", from); 171 return (1); 172 } 173 174 #define YESNO "(y/n [n]) " 175 ask = 0; 176 if (nflg) { 177 if (vflg) 178 printf("%s not overwritten\n", to); 179 return (0); 180 } else if (iflg) { 181 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO); 182 ask = 1; 183 } else if (access(to, W_OK) && !stat(to, &sb)) { 184 strmode(sb.st_mode, modep); 185 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s", 186 modep + 1, modep[9] == ' ' ? "" : " ", 187 user_from_uid((unsigned long)sb.st_uid, 0), 188 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); 189 ask = 1; 190 } 191 if (ask) { 192 first = ch = getchar(); 193 while (ch != '\n' && ch != EOF) 194 ch = getchar(); 195 if (first != 'y' && first != 'Y') { 196 (void)fprintf(stderr, "not overwritten\n"); 197 return (0); 198 } 199 } 200 } 201 if (!rename(from, to)) { 202 if (vflg) 203 printf("%s -> %s\n", from, to); 204 return (0); 205 } 206 207 if (errno == EXDEV) { 208 struct statfs sfs; 209 char path[PATH_MAX]; 210 211 /* 212 * If the source is a symbolic link and is on another 213 * filesystem, it can be recreated at the destination. 214 */ 215 if (lstat(from, &sb) == -1) { 216 warn("%s", from); 217 return (1); 218 } 219 if (!S_ISLNK(sb.st_mode)) { 220 /* Can't mv(1) a mount point. */ 221 if (realpath(from, path) == NULL) { 222 warnx("cannot resolve %s: %s", from, path); 223 return (1); 224 } 225 if (!statfs(path, &sfs) && 226 !strcmp(path, sfs.f_mntonname)) { 227 warnx("cannot rename a mount point"); 228 return (1); 229 } 230 } 231 } else { 232 warn("rename %s to %s", from, to); 233 return (1); 234 } 235 236 /* 237 * If rename fails because we're trying to cross devices, and 238 * it's a regular file, do the copy internally; otherwise, use 239 * cp and rm. 240 */ 241 if (lstat(from, &sb)) { 242 warn("%s", from); 243 return (1); 244 } 245 return (S_ISREG(sb.st_mode) ? 246 fastcopy(from, to, &sb) : copy(from, to)); 247 } 248 249 int 250 fastcopy(char *from, char *to, struct stat *sbp) 251 { 252 struct timeval tval[2]; 253 static u_int blen; 254 static char *bp; 255 mode_t oldmode; 256 int nread, from_fd, to_fd; 257 acl_t acl; 258 259 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 260 warn("%s", from); 261 return (1); 262 } 263 if (blen < sbp->st_blksize) { 264 if (bp != NULL) 265 free(bp); 266 if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) { 267 blen = 0; 268 warnx("malloc failed"); 269 return (1); 270 } 271 blen = sbp->st_blksize; 272 } 273 while ((to_fd = 274 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { 275 if (errno == EEXIST && unlink(to) == 0) 276 continue; 277 warn("%s", to); 278 (void)close(from_fd); 279 return (1); 280 } 281 while ((nread = read(from_fd, bp, (size_t)blen)) > 0) 282 if (write(to_fd, bp, (size_t)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 oldmode = sbp->st_mode & ALLPERMS; 296 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 297 warn("%s: set owner/group (was: %lu/%lu)", to, 298 (u_long)sbp->st_uid, (u_long)sbp->st_gid); 299 if (oldmode & (S_ISUID | S_ISGID)) { 300 warnx( 301 "%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", 302 to, oldmode); 303 sbp->st_mode &= ~(S_ISUID | S_ISGID); 304 } 305 } 306 /* 307 * POSIX 1003.2c states that if _POSIX_ACL_EXTENDED is in effect 308 * for dest_file, then it's ACLs shall reflect the ACLs of the 309 * source_file. 310 */ 311 if (fpathconf(to_fd, _PC_ACL_EXTENDED) == 1 && 312 fpathconf(from_fd, _PC_ACL_EXTENDED) == 1) { 313 acl = acl_get_fd(from_fd); 314 if (acl == NULL) 315 warn("failed to get acl entries while setting %s", 316 from); 317 else if (acl_set_fd(to_fd, acl) < 0) 318 warn("failed to set acl entries for %s", to); 319 } 320 (void)close(from_fd); 321 if (fchmod(to_fd, sbp->st_mode)) 322 warn("%s: set mode (was: 0%03o)", to, oldmode); 323 /* 324 * XXX 325 * NFS doesn't support chflags; ignore errors unless there's reason 326 * to believe we're losing bits. (Note, this still won't be right 327 * if the server supports flags and we were trying to *remove* flags 328 * on a file that we copied, i.e., that we didn't create.) 329 */ 330 errno = 0; 331 if (fchflags(to_fd, (u_long)sbp->st_flags)) 332 if (errno != EOPNOTSUPP || sbp->st_flags != 0) 333 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 334 335 tval[0].tv_sec = sbp->st_atime; 336 tval[1].tv_sec = sbp->st_mtime; 337 tval[0].tv_usec = tval[1].tv_usec = 0; 338 if (utimes(to, tval)) 339 warn("%s: set times", to); 340 341 if (close(to_fd)) { 342 warn("%s", to); 343 return (1); 344 } 345 346 if (unlink(from)) { 347 warn("%s: remove", from); 348 return (1); 349 } 350 if (vflg) 351 printf("%s -> %s\n", from, to); 352 return (0); 353 } 354 355 int 356 copy(char *from, char *to) 357 { 358 int pid, status; 359 360 if ((pid = fork()) == 0) { 361 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, 362 (char *)NULL); 363 warn("%s", _PATH_CP); 364 _exit(1); 365 } 366 if (waitpid(pid, &status, 0) == -1) { 367 warn("%s: waitpid", _PATH_CP); 368 return (1); 369 } 370 if (!WIFEXITED(status)) { 371 warnx("%s: did not terminate normally", _PATH_CP); 372 return (1); 373 } 374 if (WEXITSTATUS(status)) { 375 warnx("%s: terminated with %d (non-zero) status", 376 _PATH_CP, WEXITSTATUS(status)); 377 return (1); 378 } 379 if (!(pid = vfork())) { 380 execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL); 381 warn("%s", _PATH_RM); 382 _exit(1); 383 } 384 if (waitpid(pid, &status, 0) == -1) { 385 warn("%s: waitpid", _PATH_RM); 386 return (1); 387 } 388 if (!WIFEXITED(status)) { 389 warnx("%s: did not terminate normally", _PATH_RM); 390 return (1); 391 } 392 if (WEXITSTATUS(status)) { 393 warnx("%s: terminated with %d (non-zero) status", 394 _PATH_RM, WEXITSTATUS(status)); 395 return (1); 396 } 397 return (0); 398 } 399 400 void 401 usage(void) 402 { 403 404 (void)fprintf(stderr, "%s\n%s\n", 405 "usage: mv [-f | -i | -n] [-v] source target", 406 " mv [-f | -i | -n] [-v] source ... directory"); 407 exit(EX_USAGE); 408 } 409