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 * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California. All rights reserved. 37 * @(#)mv.c 8.2 (Berkeley) 4/2/94 38 * $FreeBSD: /usr/local/www/cvsroot/FreeBSD/src/bin/mv/mv.c,v 1.24.2.6 2004/03/24 08:34:36 pjd Exp $ 39 * $DragonFly: src/bin/mv/mv.c,v 1.5 2004/05/03 18:54:37 cpressey Exp $ 40 */ 41 42 #include <sys/param.h> 43 #include <sys/time.h> 44 #include <sys/wait.h> 45 #include <sys/stat.h> 46 #include <sys/mount.h> 47 48 #include <err.h> 49 #include <errno.h> 50 #include <fcntl.h> 51 #include <limits.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <sysexits.h> 56 #include <unistd.h> 57 58 #include "pathnames.h" 59 60 int fflg, iflg, nflg, vflg; 61 62 int copy (char *, char *); 63 int do_move (char *, char *); 64 int fastcopy (char *, char *, struct stat *); 65 int main (int, char *[]); 66 void usage (void); 67 68 int 69 main(int argc, char **argv) 70 { 71 register int baselen, len, rval; 72 register char *p, *endp; 73 struct stat sb; 74 int ch; 75 char path[PATH_MAX]; 76 77 while ((ch = getopt(argc, argv, "finv")) != -1) 78 switch (ch) { 79 case 'i': 80 iflg = 1; 81 fflg = nflg = 0; 82 break; 83 case 'f': 84 fflg = 1; 85 iflg = nflg = 0; 86 break; 87 case 'n': 88 nflg = 1; 89 fflg = iflg = 0; 90 break; 91 case 'v': 92 vflg = 1; 93 break; 94 default: 95 usage(); 96 } 97 argc -= optind; 98 argv += optind; 99 100 if (argc < 2) 101 usage(); 102 103 /* 104 * If the stat on the target fails or the target isn't a directory, 105 * try the move. More than 2 arguments is an error in this case. 106 */ 107 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 108 if (argc > 2) 109 usage(); 110 exit(do_move(argv[0], argv[1])); 111 } 112 113 /* It's a directory, move each file into it. */ 114 if (strlen(argv[argc - 1]) > sizeof(path) - 1) 115 errx(1, "%s: destination pathname too long", *argv); 116 (void)strcpy(path, argv[argc - 1]); 117 baselen = strlen(path); 118 endp = &path[baselen]; 119 if (!baselen || *(endp - 1) != '/') { 120 *endp++ = '/'; 121 ++baselen; 122 } 123 for (rval = 0; --argc; ++argv) { 124 /* 125 * Find the last component of the source pathname. It 126 * may have trailing slashes. 127 */ 128 p = *argv + strlen(*argv); 129 while (p != *argv && p[-1] == '/') 130 --p; 131 while (p != *argv && p[-1] != '/') 132 --p; 133 134 if ((baselen + (len = strlen(p))) >= PATH_MAX) { 135 warnx("%s: destination pathname too long", *argv); 136 rval = 1; 137 } else { 138 memmove(endp, p, (size_t)len + 1); 139 if (do_move(*argv, path)) 140 rval = 1; 141 } 142 } 143 exit(rval); 144 } 145 146 int 147 do_move(char *from, char *to) 148 { 149 struct stat sb; 150 int ask, ch, first; 151 char modep[15]; 152 153 /* 154 * Check access. If interactive and file exists, ask user if it 155 * should be replaced. Otherwise if file exists but isn't writable 156 * make sure the user wants to clobber it. 157 */ 158 if (!fflg && !access(to, F_OK)) { 159 160 /* prompt only if source exist */ 161 if (lstat(from, &sb) == -1) { 162 warn("%s", from); 163 return (1); 164 } 165 166 #define YESNO "(y/n [n]) " 167 ask = 0; 168 if (nflg) { 169 if (vflg) 170 printf("%s not overwritten\n", to); 171 return (0); 172 } else if (iflg) { 173 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO); 174 ask = 1; 175 } else if (access(to, W_OK) && !stat(to, &sb)) { 176 strmode(sb.st_mode, modep); 177 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s", 178 modep + 1, modep[9] == ' ' ? "" : " ", 179 user_from_uid((unsigned long)sb.st_uid, 0), 180 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); 181 ask = 1; 182 } 183 if (ask) { 184 first = ch = getchar(); 185 while (ch != '\n' && ch != EOF) 186 ch = getchar(); 187 if (first != 'y' && first != 'Y') { 188 (void)fprintf(stderr, "not overwritten\n"); 189 return (0); 190 } 191 } 192 } 193 if (!rename(from, to)) { 194 if (vflg) 195 printf("%s -> %s\n", from, to); 196 return (0); 197 } 198 199 if (errno == EXDEV) { 200 struct statfs sfs; 201 char path[PATH_MAX]; 202 203 /* 204 * If the source is a symbolic link and is on another 205 * filesystem, it can be recreated at the destination. 206 */ 207 if (lstat(from, &sb) == -1) { 208 warn("%s", from); 209 return (1); 210 } 211 if (!S_ISLNK(sb.st_mode)) { 212 /* Can't mv(1) a mount point. */ 213 if (realpath(from, path) == NULL) { 214 warnx("cannot resolve %s: %s", from, path); 215 return (1); 216 } 217 if (!statfs(path, &sfs) && 218 !strcmp(path, sfs.f_mntonname)) { 219 warnx("cannot rename a mount point"); 220 return (1); 221 } 222 } 223 } else { 224 warn("rename %s to %s", from, to); 225 return (1); 226 } 227 228 /* 229 * If rename fails because we're trying to cross devices, and 230 * it's a regular file, do the copy internally; otherwise, use 231 * cp and rm. 232 */ 233 if (lstat(from, &sb)) { 234 warn("%s", from); 235 return (1); 236 } 237 return (S_ISREG(sb.st_mode) ? 238 fastcopy(from, to, &sb) : copy(from, to)); 239 } 240 241 int 242 fastcopy(char *from, char *to, struct stat *sbp) 243 { 244 struct timeval tval[2]; 245 static u_int blen; 246 static char *bp; 247 mode_t oldmode; 248 register int nread, from_fd, to_fd; 249 250 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 251 warn("%s", from); 252 return (1); 253 } 254 if (blen < sbp->st_blksize) { 255 if (bp != NULL) 256 free(bp); 257 if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) { 258 blen = 0; 259 warnx("malloc failed"); 260 return (1); 261 } 262 blen = sbp->st_blksize; 263 } 264 while ((to_fd = 265 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { 266 if (errno == EEXIST && unlink(to) == 0) 267 continue; 268 warn("%s", to); 269 (void)close(from_fd); 270 return (1); 271 } 272 while ((nread = read(from_fd, bp, (size_t)blen)) > 0) 273 if (write(to_fd, bp, (size_t)nread) != nread) { 274 warn("%s", to); 275 goto err; 276 } 277 if (nread < 0) { 278 warn("%s", from); 279 err: if (unlink(to)) 280 warn("%s: remove", to); 281 (void)close(from_fd); 282 (void)close(to_fd); 283 return (1); 284 } 285 (void)close(from_fd); 286 287 oldmode = sbp->st_mode & ALLPERMS; 288 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 289 warn("%s: set owner/group (was: %lu/%lu)", to, 290 (u_long)sbp->st_uid, (u_long)sbp->st_gid); 291 if (oldmode & (S_ISUID | S_ISGID)) { 292 warnx( 293 "%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", 294 to, oldmode); 295 sbp->st_mode &= ~(S_ISUID | S_ISGID); 296 } 297 } 298 if (fchmod(to_fd, sbp->st_mode)) 299 warn("%s: set mode (was: 0%03o)", to, oldmode); 300 /* 301 * XXX 302 * NFS doesn't support chflags; ignore errors unless there's reason 303 * to believe we're losing bits. (Note, this still won't be right 304 * if the server supports flags and we were trying to *remove* flags 305 * on a file that we copied, i.e., that we didn't create.) 306 */ 307 errno = 0; 308 if (fchflags(to_fd, (u_long)sbp->st_flags)) 309 if (errno != EOPNOTSUPP || sbp->st_flags != 0) 310 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 311 312 tval[0].tv_sec = sbp->st_atime; 313 tval[1].tv_sec = sbp->st_mtime; 314 tval[0].tv_usec = tval[1].tv_usec = 0; 315 if (utimes(to, tval)) 316 warn("%s: set times", to); 317 318 if (close(to_fd)) { 319 warn("%s", to); 320 return (1); 321 } 322 323 if (unlink(from)) { 324 warn("%s: remove", from); 325 return (1); 326 } 327 if (vflg) 328 printf("%s -> %s\n", from, to); 329 return (0); 330 } 331 332 int 333 copy(char *from, char *to) 334 { 335 int pid, status; 336 337 if ((pid = fork()) == 0) { 338 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, 339 (char *)NULL); 340 warn("%s", _PATH_CP); 341 _exit(1); 342 } 343 if (waitpid(pid, &status, 0) == -1) { 344 warn("%s: waitpid", _PATH_CP); 345 return (1); 346 } 347 if (!WIFEXITED(status)) { 348 warn("%s: did not terminate normally", _PATH_CP); 349 return (1); 350 } 351 if (WEXITSTATUS(status)) { 352 warn("%s: terminated with %d (non-zero) status", 353 _PATH_CP, WEXITSTATUS(status)); 354 return (1); 355 } 356 if (!(pid = vfork())) { 357 execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL); 358 warn("%s", _PATH_RM); 359 _exit(1); 360 } 361 if (waitpid(pid, &status, 0) == -1) { 362 warn("%s: waitpid", _PATH_RM); 363 return (1); 364 } 365 if (!WIFEXITED(status)) { 366 warn("%s: did not terminate normally", _PATH_RM); 367 return (1); 368 } 369 if (WEXITSTATUS(status)) { 370 warn("%s: terminated with %d (non-zero) status", 371 _PATH_RM, WEXITSTATUS(status)); 372 return (1); 373 } 374 return (0); 375 } 376 377 void 378 usage(void) 379 { 380 381 (void)fprintf(stderr, "%s\n%s\n", 382 "usage: mv [-f | -i | -n] [-v] source target", 383 " mv [-f | -i | -n] [-v] source ... directory"); 384 exit(EX_USAGE); 385 } 386