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/param.h> 48 #include <sys/time.h> 49 #include <sys/wait.h> 50 #include <sys/stat.h> 51 #include <sys/mount.h> 52 53 #include <err.h> 54 #include <errno.h> 55 #include <fcntl.h> 56 #include <grp.h> 57 #include <limits.h> 58 #include <paths.h> 59 #include <pwd.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <sysexits.h> 64 #include <unistd.h> 65 66 int fflg, iflg, nflg, vflg; 67 68 int copy(char *, char *); 69 int do_move(char *, char *); 70 int fastcopy(char *, char *, struct stat *); 71 void usage(void); 72 73 int 74 main(int argc, char *argv[]) 75 { 76 size_t baselen, len; 77 int rval; 78 char *p, *endp; 79 struct stat sb; 80 int ch; 81 char path[PATH_MAX]; 82 83 while ((ch = getopt(argc, argv, "finv")) != -1) 84 switch (ch) { 85 case 'i': 86 iflg = 1; 87 fflg = nflg = 0; 88 break; 89 case 'f': 90 fflg = 1; 91 iflg = nflg = 0; 92 break; 93 case 'n': 94 nflg = 1; 95 fflg = iflg = 0; 96 break; 97 case 'v': 98 vflg = 1; 99 break; 100 default: 101 usage(); 102 } 103 argc -= optind; 104 argv += optind; 105 106 if (argc < 2) 107 usage(); 108 109 /* 110 * If the stat on the target fails or the target isn't a directory, 111 * try the move. More than 2 arguments is an error in this case. 112 */ 113 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 114 if (argc > 2) 115 usage(); 116 exit(do_move(argv[0], argv[1])); 117 } 118 119 /* It's a directory, move each file into it. */ 120 if (strlen(argv[argc - 1]) > sizeof(path) - 1) 121 errx(1, "%s: destination pathname too long", *argv); 122 (void)strcpy(path, argv[argc - 1]); 123 baselen = strlen(path); 124 endp = &path[baselen]; 125 if (!baselen || *(endp - 1) != '/') { 126 *endp++ = '/'; 127 ++baselen; 128 } 129 for (rval = 0; --argc; ++argv) { 130 /* 131 * Find the last component of the source pathname. It 132 * may have trailing slashes. 133 */ 134 p = *argv + strlen(*argv); 135 while (p != *argv && p[-1] == '/') 136 --p; 137 while (p != *argv && p[-1] != '/') 138 --p; 139 140 if ((baselen + (len = strlen(p))) >= PATH_MAX) { 141 warnx("%s: destination pathname too long", *argv); 142 rval = 1; 143 } else { 144 memmove(endp, p, (size_t)len + 1); 145 if (do_move(*argv, path)) 146 rval = 1; 147 } 148 } 149 exit(rval); 150 } 151 152 int 153 do_move(char *from, char *to) 154 { 155 struct stat sb; 156 int ask, ch, first; 157 char modep[15]; 158 159 /* 160 * Check access. If interactive and file exists, ask user if it 161 * should be replaced. Otherwise if file exists but isn't writable 162 * make sure the user wants to clobber it. 163 */ 164 if (!fflg && !access(to, F_OK)) { 165 166 /* prompt only if source exist */ 167 if (lstat(from, &sb) == -1) { 168 warn("%s", from); 169 return (1); 170 } 171 172 #define YESNO "(y/n [n]) " 173 ask = 0; 174 if (nflg) { 175 if (vflg) 176 printf("%s not overwritten\n", to); 177 return (0); 178 } else if (iflg) { 179 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO); 180 ask = 1; 181 } else if (access(to, W_OK) && !stat(to, &sb)) { 182 strmode(sb.st_mode, modep); 183 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s", 184 modep + 1, modep[9] == ' ' ? "" : " ", 185 user_from_uid((unsigned long)sb.st_uid, 0), 186 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); 187 ask = 1; 188 } 189 if (ask) { 190 first = ch = getchar(); 191 while (ch != '\n' && ch != EOF) 192 ch = getchar(); 193 if (first != 'y' && first != 'Y') { 194 (void)fprintf(stderr, "not overwritten\n"); 195 return (0); 196 } 197 } 198 } 199 if (!rename(from, to)) { 200 if (vflg) 201 printf("%s -> %s\n", from, to); 202 return (0); 203 } 204 205 if (errno == EXDEV) { 206 struct statfs sfs; 207 char path[PATH_MAX]; 208 209 /* 210 * If the source is a symbolic link and is on another 211 * filesystem, it can be recreated at the destination. 212 */ 213 if (lstat(from, &sb) == -1) { 214 warn("%s", from); 215 return (1); 216 } 217 if (!S_ISLNK(sb.st_mode)) { 218 /* Can't mv(1) a mount point. */ 219 if (realpath(from, path) == NULL) { 220 warnx("cannot resolve %s: %s", from, path); 221 return (1); 222 } 223 if (!statfs(path, &sfs) && 224 !strcmp(path, sfs.f_mntonname)) { 225 warnx("cannot rename a mount point"); 226 return (1); 227 } 228 } 229 } else { 230 warn("rename %s to %s", from, to); 231 return (1); 232 } 233 234 /* 235 * If rename fails because we're trying to cross devices, and 236 * it's a regular file, do the copy internally; otherwise, use 237 * cp and rm. 238 */ 239 if (lstat(from, &sb)) { 240 warn("%s", from); 241 return (1); 242 } 243 return (S_ISREG(sb.st_mode) ? 244 fastcopy(from, to, &sb) : copy(from, to)); 245 } 246 247 int 248 fastcopy(char *from, char *to, struct stat *sbp) 249 { 250 struct timeval tval[2]; 251 static u_int blen; 252 static char *bp; 253 mode_t oldmode; 254 int nread, from_fd, to_fd; 255 256 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 257 warn("%s", from); 258 return (1); 259 } 260 if (blen < sbp->st_blksize) { 261 if (bp != NULL) 262 free(bp); 263 if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) { 264 blen = 0; 265 warnx("malloc failed"); 266 return (1); 267 } 268 blen = sbp->st_blksize; 269 } 270 while ((to_fd = 271 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { 272 if (errno == EEXIST && unlink(to) == 0) 273 continue; 274 warn("%s", to); 275 (void)close(from_fd); 276 return (1); 277 } 278 while ((nread = read(from_fd, bp, (size_t)blen)) > 0) 279 if (write(to_fd, bp, (size_t)nread) != nread) { 280 warn("%s", to); 281 goto err; 282 } 283 if (nread < 0) { 284 warn("%s", from); 285 err: if (unlink(to)) 286 warn("%s: remove", to); 287 (void)close(from_fd); 288 (void)close(to_fd); 289 return (1); 290 } 291 (void)close(from_fd); 292 293 oldmode = sbp->st_mode & ALLPERMS; 294 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 295 warn("%s: set owner/group (was: %lu/%lu)", to, 296 (u_long)sbp->st_uid, (u_long)sbp->st_gid); 297 if (oldmode & (S_ISUID | S_ISGID)) { 298 warnx( 299 "%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", 300 to, oldmode); 301 sbp->st_mode &= ~(S_ISUID | S_ISGID); 302 } 303 } 304 if (fchmod(to_fd, sbp->st_mode)) 305 warn("%s: set mode (was: 0%03o)", to, oldmode); 306 /* 307 * XXX 308 * NFS doesn't support chflags; ignore errors unless there's reason 309 * to believe we're losing bits. (Note, this still won't be right 310 * if the server supports flags and we were trying to *remove* flags 311 * on a file that we copied, i.e., that we didn't create.) 312 */ 313 errno = 0; 314 if (fchflags(to_fd, (u_long)sbp->st_flags)) 315 if (errno != EOPNOTSUPP || sbp->st_flags != 0) 316 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 317 318 tval[0].tv_sec = sbp->st_atime; 319 tval[1].tv_sec = sbp->st_mtime; 320 tval[0].tv_usec = tval[1].tv_usec = 0; 321 if (utimes(to, tval)) 322 warn("%s: set times", to); 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 if (vflg) 334 printf("%s -> %s\n", from, to); 335 return (0); 336 } 337 338 int 339 copy(char *from, char *to) 340 { 341 int pid, status; 342 343 if ((pid = fork()) == 0) { 344 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, 345 (char *)NULL); 346 warn("%s", _PATH_CP); 347 _exit(1); 348 } 349 if (waitpid(pid, &status, 0) == -1) { 350 warn("%s: waitpid", _PATH_CP); 351 return (1); 352 } 353 if (!WIFEXITED(status)) { 354 warn("%s: did not terminate normally", _PATH_CP); 355 return (1); 356 } 357 if (WEXITSTATUS(status)) { 358 warn("%s: terminated with %d (non-zero) status", 359 _PATH_CP, WEXITSTATUS(status)); 360 return (1); 361 } 362 if (!(pid = vfork())) { 363 execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL); 364 warn("%s", _PATH_RM); 365 _exit(1); 366 } 367 if (waitpid(pid, &status, 0) == -1) { 368 warn("%s: waitpid", _PATH_RM); 369 return (1); 370 } 371 if (!WIFEXITED(status)) { 372 warn("%s: did not terminate normally", _PATH_RM); 373 return (1); 374 } 375 if (WEXITSTATUS(status)) { 376 warn("%s: terminated with %d (non-zero) status", 377 _PATH_RM, WEXITSTATUS(status)); 378 return (1); 379 } 380 return (0); 381 } 382 383 void 384 usage(void) 385 { 386 387 (void)fprintf(stderr, "%s\n%s\n", 388 "usage: mv [-f | -i | -n] [-v] source target", 389 " mv [-f | -i | -n] [-v] source ... directory"); 390 exit(EX_USAGE); 391 } 392