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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #if 0 38 #ifndef lint 39 static char const copyright[] = 40 "@(#) Copyright (c) 1989, 1993, 1994\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42 #endif /* not lint */ 43 44 #ifndef lint 45 static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94"; 46 #endif /* not lint */ 47 #endif 48 #include <sys/cdefs.h> 49 __FBSDID("$FreeBSD$"); 50 51 #include <sys/param.h> 52 #include <sys/time.h> 53 #include <sys/wait.h> 54 #include <sys/stat.h> 55 #include <sys/mount.h> 56 57 #include <err.h> 58 #include <errno.h> 59 #include <fcntl.h> 60 #include <grp.h> 61 #include <limits.h> 62 #include <paths.h> 63 #include <pwd.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <sysexits.h> 68 #include <unistd.h> 69 70 int fflg, iflg, nflg, vflg; 71 72 int copy(char *, char *); 73 int do_move(char *, char *); 74 int fastcopy(char *, char *, struct stat *); 75 void usage(void); 76 77 int 78 main(int argc, char *argv[]) 79 { 80 size_t baselen, len; 81 int rval; 82 char *p, *endp; 83 struct stat sb; 84 int ch; 85 char path[PATH_MAX]; 86 87 while ((ch = getopt(argc, argv, "finv")) != -1) 88 switch (ch) { 89 case 'i': 90 iflg = 1; 91 fflg = nflg = 0; 92 break; 93 case 'f': 94 fflg = 1; 95 iflg = nflg = 0; 96 break; 97 case 'n': 98 nflg = 1; 99 fflg = iflg = 0; 100 break; 101 case 'v': 102 vflg = 1; 103 break; 104 default: 105 usage(); 106 } 107 argc -= optind; 108 argv += optind; 109 110 if (argc < 2) 111 usage(); 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 if (strlen(argv[argc - 1]) > sizeof(path) - 1) 125 errx(1, "%s: destination pathname too long", *argv); 126 (void)strcpy(path, argv[argc - 1]); 127 baselen = strlen(path); 128 endp = &path[baselen]; 129 if (!baselen || *(endp - 1) != '/') { 130 *endp++ = '/'; 131 ++baselen; 132 } 133 for (rval = 0; --argc; ++argv) { 134 /* 135 * Find the last component of the source pathname. It 136 * may have trailing slashes. 137 */ 138 p = *argv + strlen(*argv); 139 while (p != *argv && p[-1] == '/') 140 --p; 141 while (p != *argv && p[-1] != '/') 142 --p; 143 144 if ((baselen + (len = strlen(p))) >= PATH_MAX) { 145 warnx("%s: destination pathname too long", *argv); 146 rval = 1; 147 } else { 148 memmove(endp, p, (size_t)len + 1); 149 if (do_move(*argv, path)) 150 rval = 1; 151 } 152 } 153 exit(rval); 154 } 155 156 int 157 do_move(char *from, char *to) 158 { 159 struct stat sb; 160 int ask, ch, first; 161 char modep[15]; 162 163 /* 164 * Check access. If interactive and file exists, ask user if it 165 * should be replaced. Otherwise if file exists but isn't writable 166 * make sure the user wants to clobber it. 167 */ 168 if (!fflg && !access(to, F_OK)) { 169 170 /* prompt only if source exist */ 171 if (lstat(from, &sb) == -1) { 172 warn("%s", from); 173 return (1); 174 } 175 176 #define YESNO "(y/n [n]) " 177 ask = 0; 178 if (nflg) { 179 if (vflg) 180 printf("%s not overwritten\n", to); 181 return (0); 182 } else if (iflg) { 183 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO); 184 ask = 1; 185 } else if (access(to, W_OK) && !stat(to, &sb)) { 186 strmode(sb.st_mode, modep); 187 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s", 188 modep + 1, modep[9] == ' ' ? "" : " ", 189 user_from_uid((unsigned long)sb.st_uid, 0), 190 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); 191 ask = 1; 192 } 193 if (ask) { 194 first = ch = getchar(); 195 while (ch != '\n' && ch != EOF) 196 ch = getchar(); 197 if (first != 'y' && first != 'Y') { 198 (void)fprintf(stderr, "not overwritten\n"); 199 return (0); 200 } 201 } 202 } 203 if (!rename(from, to)) { 204 if (vflg) 205 printf("%s -> %s\n", from, to); 206 return (0); 207 } 208 209 if (errno == EXDEV) { 210 struct statfs sfs; 211 char path[PATH_MAX]; 212 213 /* Can't mv(1) a mount point. */ 214 if (realpath(from, path) == NULL) { 215 warnx("cannot resolve %s: %s", from, path); 216 return (1); 217 } 218 if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) { 219 warnx("cannot rename a mount point"); 220 return (1); 221 } 222 } else { 223 warn("rename %s to %s", from, to); 224 return (1); 225 } 226 227 /* 228 * If rename fails because we're trying to cross devices, and 229 * it's a regular file, do the copy internally; otherwise, use 230 * cp and rm. 231 */ 232 if (lstat(from, &sb)) { 233 warn("%s", from); 234 return (1); 235 } 236 return (S_ISREG(sb.st_mode) ? 237 fastcopy(from, to, &sb) : copy(from, to)); 238 } 239 240 int 241 fastcopy(char *from, char *to, struct stat *sbp) 242 { 243 struct timeval tval[2]; 244 static u_int blen; 245 static char *bp; 246 mode_t oldmode; 247 int nread, from_fd, to_fd; 248 249 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 250 warn("%s", from); 251 return (1); 252 } 253 if (blen < sbp->st_blksize) { 254 if (bp != NULL) 255 free(bp); 256 if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) { 257 blen = 0; 258 warnx("malloc failed"); 259 return (1); 260 } 261 blen = sbp->st_blksize; 262 } 263 while ((to_fd = 264 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { 265 if (errno == EEXIST && unlink(to) == 0) 266 continue; 267 warn("%s", to); 268 (void)close(from_fd); 269 return (1); 270 } 271 while ((nread = read(from_fd, bp, (size_t)blen)) > 0) 272 if (write(to_fd, bp, (size_t)nread) != nread) { 273 warn("%s", to); 274 goto err; 275 } 276 if (nread < 0) { 277 warn("%s", from); 278 err: if (unlink(to)) 279 warn("%s: remove", to); 280 (void)close(from_fd); 281 (void)close(to_fd); 282 return (1); 283 } 284 (void)close(from_fd); 285 286 oldmode = sbp->st_mode & ALLPERMS; 287 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 288 warn("%s: set owner/group (was: %lu/%lu)", to, 289 (u_long)sbp->st_uid, (u_long)sbp->st_gid); 290 if (oldmode & (S_ISUID | S_ISGID)) { 291 warnx( 292 "%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", 293 to, oldmode); 294 sbp->st_mode &= ~(S_ISUID | S_ISGID); 295 } 296 } 297 if (fchmod(to_fd, sbp->st_mode)) 298 warn("%s: set mode (was: 0%03o)", to, oldmode); 299 /* 300 * XXX 301 * NFS doesn't support chflags; ignore errors unless there's reason 302 * to believe we're losing bits. (Note, this still won't be right 303 * if the server supports flags and we were trying to *remove* flags 304 * on a file that we copied, i.e., that we didn't create.) 305 */ 306 errno = 0; 307 if (fchflags(to_fd, (u_long)sbp->st_flags)) 308 if (errno != EOPNOTSUPP || sbp->st_flags != 0) 309 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 310 311 tval[0].tv_sec = sbp->st_atime; 312 tval[1].tv_sec = sbp->st_mtime; 313 tval[0].tv_usec = tval[1].tv_usec = 0; 314 if (utimes(to, tval)) 315 warn("%s: set times", to); 316 317 if (close(to_fd)) { 318 warn("%s", to); 319 return (1); 320 } 321 322 if (unlink(from)) { 323 warn("%s: remove", from); 324 return (1); 325 } 326 if (vflg) 327 printf("%s -> %s\n", from, to); 328 return (0); 329 } 330 331 int 332 copy(char *from, char *to) 333 { 334 int pid, status; 335 336 if ((pid = fork()) == 0) { 337 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, 338 (char *)NULL); 339 warn("%s", _PATH_CP); 340 _exit(1); 341 } 342 if (waitpid(pid, &status, 0) == -1) { 343 warn("%s: waitpid", _PATH_CP); 344 return (1); 345 } 346 if (!WIFEXITED(status)) { 347 warn("%s: did not terminate normally", _PATH_CP); 348 return (1); 349 } 350 if (WEXITSTATUS(status)) { 351 warn("%s: terminated with %d (non-zero) status", 352 _PATH_CP, WEXITSTATUS(status)); 353 return (1); 354 } 355 if (!(pid = vfork())) { 356 execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL); 357 warn("%s", _PATH_RM); 358 _exit(1); 359 } 360 if (waitpid(pid, &status, 0) == -1) { 361 warn("%s: waitpid", _PATH_RM); 362 return (1); 363 } 364 if (!WIFEXITED(status)) { 365 warn("%s: did not terminate normally", _PATH_RM); 366 return (1); 367 } 368 if (WEXITSTATUS(status)) { 369 warn("%s: terminated with %d (non-zero) status", 370 _PATH_RM, WEXITSTATUS(status)); 371 return (1); 372 } 373 return (0); 374 } 375 376 void 377 usage(void) 378 { 379 380 (void)fprintf(stderr, "%s\n%s\n", 381 "usage: mv [-f | -i | -n] [-v] source target", 382 " mv [-f | -i | -n] [-v] source ... directory"); 383 exit(EX_USAGE); 384 } 385