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 #ifndef lint 38 static char const copyright[] = 39 "@(#) Copyright (c) 1989, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94"; 46 #endif 47 static const char rcsid[] = 48 "$FreeBSD: src/bin/mv/mv.c,v 1.24.2.5 2002/08/19 00:26:41 johan Exp $"; 49 #endif /* not lint */ 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 <limits.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <sysexits.h> 65 #include <unistd.h> 66 67 #include "pathnames.h" 68 69 int fflg, iflg, nflg, vflg; 70 71 int copy __P((char *, char *)); 72 int do_move __P((char *, char *)); 73 int fastcopy __P((char *, char *, struct stat *)); 74 int main __P((int, char *[])); 75 void usage __P((void)); 76 77 int 78 main(argc, argv) 79 int argc; 80 char *argv[]; 81 { 82 register int baselen, len, rval; 83 register char *p, *endp; 84 struct stat sb; 85 int ch; 86 char path[PATH_MAX]; 87 88 while ((ch = getopt(argc, argv, "finv")) != -1) 89 switch (ch) { 90 case 'i': 91 iflg = 1; 92 fflg = nflg = 0; 93 break; 94 case 'f': 95 fflg = 1; 96 iflg = nflg = 0; 97 break; 98 case 'n': 99 nflg = 1; 100 fflg = iflg = 0; 101 break; 102 case 'v': 103 vflg = 1; 104 break; 105 default: 106 usage(); 107 } 108 argc -= optind; 109 argv += optind; 110 111 if (argc < 2) 112 usage(); 113 114 /* 115 * If the stat on the target fails or the target isn't a directory, 116 * try the move. More than 2 arguments is an error in this case. 117 */ 118 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 119 if (argc > 2) 120 usage(); 121 exit(do_move(argv[0], argv[1])); 122 } 123 124 /* It's a directory, move each file into it. */ 125 if (strlen(argv[argc - 1]) > sizeof(path) - 1) 126 errx(1, "%s: destination pathname too long", *argv); 127 (void)strcpy(path, argv[argc - 1]); 128 baselen = strlen(path); 129 endp = &path[baselen]; 130 if (!baselen || *(endp - 1) != '/') { 131 *endp++ = '/'; 132 ++baselen; 133 } 134 for (rval = 0; --argc; ++argv) { 135 /* 136 * Find the last component of the source pathname. It 137 * may have trailing slashes. 138 */ 139 p = *argv + strlen(*argv); 140 while (p != *argv && p[-1] == '/') 141 --p; 142 while (p != *argv && p[-1] != '/') 143 --p; 144 145 if ((baselen + (len = strlen(p))) >= PATH_MAX) { 146 warnx("%s: destination pathname too long", *argv); 147 rval = 1; 148 } else { 149 memmove(endp, p, (size_t)len + 1); 150 if (do_move(*argv, path)) 151 rval = 1; 152 } 153 } 154 exit(rval); 155 } 156 157 int 158 do_move(from, to) 159 char *from, *to; 160 { 161 struct stat sb; 162 int ask, ch, first; 163 char modep[15]; 164 165 /* 166 * Check access. If interactive and file exists, ask user if it 167 * should be replaced. Otherwise if file exists but isn't writable 168 * make sure the user wants to clobber it. 169 */ 170 if (!fflg && !access(to, F_OK)) { 171 172 /* prompt only if source exist */ 173 if (lstat(from, &sb) == -1) { 174 warn("%s", from); 175 return (1); 176 } 177 178 #define YESNO "(y/n [n]) " 179 ask = 0; 180 if (nflg) { 181 if (vflg) 182 printf("%s not overwritten\n", to); 183 return (0); 184 } else if (iflg) { 185 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO); 186 ask = 1; 187 } else if (access(to, W_OK) && !stat(to, &sb)) { 188 strmode(sb.st_mode, modep); 189 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s", 190 modep + 1, modep[9] == ' ' ? "" : " ", 191 user_from_uid((unsigned long)sb.st_uid, 0), 192 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); 193 ask = 1; 194 } 195 if (ask) { 196 first = ch = getchar(); 197 while (ch != '\n' && ch != EOF) 198 ch = getchar(); 199 if (first != 'y' && first != 'Y') { 200 (void)fprintf(stderr, "not overwritten\n"); 201 return (0); 202 } 203 } 204 } 205 if (!rename(from, to)) { 206 if (vflg) 207 printf("%s -> %s\n", from, to); 208 return (0); 209 } 210 211 if (errno == EXDEV) { 212 struct statfs sfs; 213 char path[PATH_MAX]; 214 215 /* Can't mv(1) a mount point. */ 216 if (realpath(from, path) == NULL) { 217 warnx("cannot resolve %s: %s", from, path); 218 return (1); 219 } 220 if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) { 221 warnx("cannot rename a mount point"); 222 return (1); 223 } 224 } else { 225 warn("rename %s to %s", from, to); 226 return (1); 227 } 228 229 /* 230 * If rename fails because we're trying to cross devices, and 231 * it's a regular file, do the copy internally; otherwise, use 232 * cp and rm. 233 */ 234 if (lstat(from, &sb)) { 235 warn("%s", from); 236 return (1); 237 } 238 return (S_ISREG(sb.st_mode) ? 239 fastcopy(from, to, &sb) : copy(from, to)); 240 } 241 242 int 243 fastcopy(from, to, sbp) 244 char *from, *to; 245 struct stat *sbp; 246 { 247 struct timeval tval[2]; 248 static u_int blen; 249 static char *bp; 250 mode_t oldmode; 251 register int nread, from_fd, to_fd; 252 253 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 254 warn("%s", from); 255 return (1); 256 } 257 if (blen < sbp->st_blksize) { 258 if (bp != NULL) 259 free(bp); 260 if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) { 261 blen = 0; 262 warnx("malloc failed"); 263 return (1); 264 } 265 blen = sbp->st_blksize; 266 } 267 while ((to_fd = 268 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { 269 if (errno == EEXIST && unlink(to) == 0) 270 continue; 271 warn("%s", to); 272 (void)close(from_fd); 273 return (1); 274 } 275 while ((nread = read(from_fd, bp, (size_t)blen)) > 0) 276 if (write(to_fd, bp, (size_t)nread) != nread) { 277 warn("%s", to); 278 goto err; 279 } 280 if (nread < 0) { 281 warn("%s", from); 282 err: if (unlink(to)) 283 warn("%s: remove", to); 284 (void)close(from_fd); 285 (void)close(to_fd); 286 return (1); 287 } 288 (void)close(from_fd); 289 290 oldmode = sbp->st_mode & ALLPERMS; 291 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 292 warn("%s: set owner/group (was: %lu/%lu)", to, 293 (u_long)sbp->st_uid, (u_long)sbp->st_gid); 294 if (oldmode & (S_ISUID | S_ISGID)) { 295 warnx( 296 "%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", 297 to, oldmode); 298 sbp->st_mode &= ~(S_ISUID | S_ISGID); 299 } 300 } 301 if (fchmod(to_fd, sbp->st_mode)) 302 warn("%s: set mode (was: 0%03o)", to, oldmode); 303 /* 304 * XXX 305 * NFS doesn't support chflags; ignore errors unless there's reason 306 * to believe we're losing bits. (Note, this still won't be right 307 * if the server supports flags and we were trying to *remove* flags 308 * on a file that we copied, i.e., that we didn't create.) 309 */ 310 errno = 0; 311 if (fchflags(to_fd, (u_long)sbp->st_flags)) 312 if (errno != EOPNOTSUPP || sbp->st_flags != 0) 313 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 314 315 tval[0].tv_sec = sbp->st_atime; 316 tval[1].tv_sec = sbp->st_mtime; 317 tval[0].tv_usec = tval[1].tv_usec = 0; 318 if (utimes(to, tval)) 319 warn("%s: set times", to); 320 321 if (close(to_fd)) { 322 warn("%s", to); 323 return (1); 324 } 325 326 if (unlink(from)) { 327 warn("%s: remove", from); 328 return (1); 329 } 330 if (vflg) 331 printf("%s -> %s\n", from, to); 332 return (0); 333 } 334 335 int 336 copy(from, to) 337 char *from, *to; 338 { 339 int pid, status; 340 341 if ((pid = fork()) == 0) { 342 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, 343 (char *)NULL); 344 warn("%s", _PATH_CP); 345 _exit(1); 346 } 347 if (waitpid(pid, &status, 0) == -1) { 348 warn("%s: waitpid", _PATH_CP); 349 return (1); 350 } 351 if (!WIFEXITED(status)) { 352 warn("%s: did not terminate normally", _PATH_CP); 353 return (1); 354 } 355 if (WEXITSTATUS(status)) { 356 warn("%s: terminated with %d (non-zero) status", 357 _PATH_CP, WEXITSTATUS(status)); 358 return (1); 359 } 360 if (!(pid = vfork())) { 361 execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL); 362 warn("%s", _PATH_RM); 363 _exit(1); 364 } 365 if (waitpid(pid, &status, 0) == -1) { 366 warn("%s: waitpid", _PATH_RM); 367 return (1); 368 } 369 if (!WIFEXITED(status)) { 370 warn("%s: did not terminate normally", _PATH_RM); 371 return (1); 372 } 373 if (WEXITSTATUS(status)) { 374 warn("%s: terminated with %d (non-zero) status", 375 _PATH_RM, WEXITSTATUS(status)); 376 return (1); 377 } 378 return (0); 379 } 380 381 void 382 usage() 383 { 384 385 (void)fprintf(stderr, "%s\n%s\n", 386 "usage: mv [-f | -i | -n] [-v] source target", 387 " mv [-f | -i | -n] [-v] source ... directory"); 388 exit(EX_USAGE); 389 } 390