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: src/bin/mv/mv.c,v 1.24.2.5 2002/08/19 00:26:41 johan Exp $ 39 * $DragonFly: src/bin/mv/mv.c,v 1.2 2003/06/17 04:22:50 dillon 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 __P((char *, char *)); 63 int do_move __P((char *, char *)); 64 int fastcopy __P((char *, char *, struct stat *)); 65 int main __P((int, char *[])); 66 void usage __P((void)); 67 68 int 69 main(argc, argv) 70 int argc; 71 char *argv[]; 72 { 73 register int baselen, len, rval; 74 register char *p, *endp; 75 struct stat sb; 76 int ch; 77 char path[PATH_MAX]; 78 79 while ((ch = getopt(argc, argv, "finv")) != -1) 80 switch (ch) { 81 case 'i': 82 iflg = 1; 83 fflg = nflg = 0; 84 break; 85 case 'f': 86 fflg = 1; 87 iflg = nflg = 0; 88 break; 89 case 'n': 90 nflg = 1; 91 fflg = iflg = 0; 92 break; 93 case 'v': 94 vflg = 1; 95 break; 96 default: 97 usage(); 98 } 99 argc -= optind; 100 argv += optind; 101 102 if (argc < 2) 103 usage(); 104 105 /* 106 * If the stat on the target fails or the target isn't a directory, 107 * try the move. More than 2 arguments is an error in this case. 108 */ 109 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 110 if (argc > 2) 111 usage(); 112 exit(do_move(argv[0], argv[1])); 113 } 114 115 /* It's a directory, move each file into it. */ 116 if (strlen(argv[argc - 1]) > sizeof(path) - 1) 117 errx(1, "%s: destination pathname too long", *argv); 118 (void)strcpy(path, argv[argc - 1]); 119 baselen = strlen(path); 120 endp = &path[baselen]; 121 if (!baselen || *(endp - 1) != '/') { 122 *endp++ = '/'; 123 ++baselen; 124 } 125 for (rval = 0; --argc; ++argv) { 126 /* 127 * Find the last component of the source pathname. It 128 * may have trailing slashes. 129 */ 130 p = *argv + strlen(*argv); 131 while (p != *argv && p[-1] == '/') 132 --p; 133 while (p != *argv && p[-1] != '/') 134 --p; 135 136 if ((baselen + (len = strlen(p))) >= PATH_MAX) { 137 warnx("%s: destination pathname too long", *argv); 138 rval = 1; 139 } else { 140 memmove(endp, p, (size_t)len + 1); 141 if (do_move(*argv, path)) 142 rval = 1; 143 } 144 } 145 exit(rval); 146 } 147 148 int 149 do_move(from, to) 150 char *from, *to; 151 { 152 struct stat sb; 153 int ask, ch, first; 154 char modep[15]; 155 156 /* 157 * Check access. If interactive and file exists, ask user if it 158 * should be replaced. Otherwise if file exists but isn't writable 159 * make sure the user wants to clobber it. 160 */ 161 if (!fflg && !access(to, F_OK)) { 162 163 /* prompt only if source exist */ 164 if (lstat(from, &sb) == -1) { 165 warn("%s", from); 166 return (1); 167 } 168 169 #define YESNO "(y/n [n]) " 170 ask = 0; 171 if (nflg) { 172 if (vflg) 173 printf("%s not overwritten\n", to); 174 return (0); 175 } else if (iflg) { 176 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO); 177 ask = 1; 178 } else if (access(to, W_OK) && !stat(to, &sb)) { 179 strmode(sb.st_mode, modep); 180 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s", 181 modep + 1, modep[9] == ' ' ? "" : " ", 182 user_from_uid((unsigned long)sb.st_uid, 0), 183 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); 184 ask = 1; 185 } 186 if (ask) { 187 first = ch = getchar(); 188 while (ch != '\n' && ch != EOF) 189 ch = getchar(); 190 if (first != 'y' && first != 'Y') { 191 (void)fprintf(stderr, "not overwritten\n"); 192 return (0); 193 } 194 } 195 } 196 if (!rename(from, to)) { 197 if (vflg) 198 printf("%s -> %s\n", from, to); 199 return (0); 200 } 201 202 if (errno == EXDEV) { 203 struct statfs sfs; 204 char path[PATH_MAX]; 205 206 /* Can't mv(1) a mount point. */ 207 if (realpath(from, path) == NULL) { 208 warnx("cannot resolve %s: %s", from, path); 209 return (1); 210 } 211 if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) { 212 warnx("cannot rename a mount point"); 213 return (1); 214 } 215 } else { 216 warn("rename %s to %s", from, to); 217 return (1); 218 } 219 220 /* 221 * If rename fails because we're trying to cross devices, and 222 * it's a regular file, do the copy internally; otherwise, use 223 * cp and rm. 224 */ 225 if (lstat(from, &sb)) { 226 warn("%s", from); 227 return (1); 228 } 229 return (S_ISREG(sb.st_mode) ? 230 fastcopy(from, to, &sb) : copy(from, to)); 231 } 232 233 int 234 fastcopy(from, to, sbp) 235 char *from, *to; 236 struct stat *sbp; 237 { 238 struct timeval tval[2]; 239 static u_int blen; 240 static char *bp; 241 mode_t oldmode; 242 register int nread, from_fd, to_fd; 243 244 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 245 warn("%s", from); 246 return (1); 247 } 248 if (blen < sbp->st_blksize) { 249 if (bp != NULL) 250 free(bp); 251 if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) { 252 blen = 0; 253 warnx("malloc failed"); 254 return (1); 255 } 256 blen = sbp->st_blksize; 257 } 258 while ((to_fd = 259 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { 260 if (errno == EEXIST && unlink(to) == 0) 261 continue; 262 warn("%s", to); 263 (void)close(from_fd); 264 return (1); 265 } 266 while ((nread = read(from_fd, bp, (size_t)blen)) > 0) 267 if (write(to_fd, bp, (size_t)nread) != nread) { 268 warn("%s", to); 269 goto err; 270 } 271 if (nread < 0) { 272 warn("%s", from); 273 err: if (unlink(to)) 274 warn("%s: remove", to); 275 (void)close(from_fd); 276 (void)close(to_fd); 277 return (1); 278 } 279 (void)close(from_fd); 280 281 oldmode = sbp->st_mode & ALLPERMS; 282 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 283 warn("%s: set owner/group (was: %lu/%lu)", to, 284 (u_long)sbp->st_uid, (u_long)sbp->st_gid); 285 if (oldmode & (S_ISUID | S_ISGID)) { 286 warnx( 287 "%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", 288 to, oldmode); 289 sbp->st_mode &= ~(S_ISUID | S_ISGID); 290 } 291 } 292 if (fchmod(to_fd, sbp->st_mode)) 293 warn("%s: set mode (was: 0%03o)", to, oldmode); 294 /* 295 * XXX 296 * NFS doesn't support chflags; ignore errors unless there's reason 297 * to believe we're losing bits. (Note, this still won't be right 298 * if the server supports flags and we were trying to *remove* flags 299 * on a file that we copied, i.e., that we didn't create.) 300 */ 301 errno = 0; 302 if (fchflags(to_fd, (u_long)sbp->st_flags)) 303 if (errno != EOPNOTSUPP || sbp->st_flags != 0) 304 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 305 306 tval[0].tv_sec = sbp->st_atime; 307 tval[1].tv_sec = sbp->st_mtime; 308 tval[0].tv_usec = tval[1].tv_usec = 0; 309 if (utimes(to, tval)) 310 warn("%s: set times", to); 311 312 if (close(to_fd)) { 313 warn("%s", to); 314 return (1); 315 } 316 317 if (unlink(from)) { 318 warn("%s: remove", from); 319 return (1); 320 } 321 if (vflg) 322 printf("%s -> %s\n", from, to); 323 return (0); 324 } 325 326 int 327 copy(from, to) 328 char *from, *to; 329 { 330 int pid, status; 331 332 if ((pid = fork()) == 0) { 333 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, 334 (char *)NULL); 335 warn("%s", _PATH_CP); 336 _exit(1); 337 } 338 if (waitpid(pid, &status, 0) == -1) { 339 warn("%s: waitpid", _PATH_CP); 340 return (1); 341 } 342 if (!WIFEXITED(status)) { 343 warn("%s: did not terminate normally", _PATH_CP); 344 return (1); 345 } 346 if (WEXITSTATUS(status)) { 347 warn("%s: terminated with %d (non-zero) status", 348 _PATH_CP, WEXITSTATUS(status)); 349 return (1); 350 } 351 if (!(pid = vfork())) { 352 execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL); 353 warn("%s", _PATH_RM); 354 _exit(1); 355 } 356 if (waitpid(pid, &status, 0) == -1) { 357 warn("%s: waitpid", _PATH_RM); 358 return (1); 359 } 360 if (!WIFEXITED(status)) { 361 warn("%s: did not terminate normally", _PATH_RM); 362 return (1); 363 } 364 if (WEXITSTATUS(status)) { 365 warn("%s: terminated with %d (non-zero) status", 366 _PATH_RM, WEXITSTATUS(status)); 367 return (1); 368 } 369 return (0); 370 } 371 372 void 373 usage() 374 { 375 376 (void)fprintf(stderr, "%s\n%s\n", 377 "usage: mv [-f | -i | -n] [-v] source target", 378 " mv [-f | -i | -n] [-v] source ... directory"); 379 exit(EX_USAGE); 380 } 381