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 #endif /* not lint */ 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 <pwd.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <sysexits.h> 67 #include <unistd.h> 68 69 #include "pathnames.h" 70 71 int fflg, iflg, nflg, vflg; 72 73 int copy(char *, char *); 74 int do_move(char *, char *); 75 int fastcopy(char *, char *, struct stat *); 76 void usage(void); 77 78 int 79 main(int argc, char *argv[]) 80 { 81 size_t baselen, len; 82 int rval; 83 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(char *from, char *to) 159 { 160 struct stat sb; 161 int ask, ch, first; 162 char modep[15]; 163 164 /* 165 * Check access. If interactive and file exists, ask user if it 166 * should be replaced. Otherwise if file exists but isn't writable 167 * make sure the user wants to clobber it. 168 */ 169 if (!fflg && !access(to, F_OK)) { 170 171 /* prompt only if source exist */ 172 if (lstat(from, &sb) == -1) { 173 warn("%s", from); 174 return (1); 175 } 176 177 #define YESNO "(y/n [n]) " 178 ask = 0; 179 if (nflg) { 180 if (vflg) 181 printf("%s not overwritten\n", to); 182 return (0); 183 } else if (iflg) { 184 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO); 185 ask = 1; 186 } else if (access(to, W_OK) && !stat(to, &sb)) { 187 strmode(sb.st_mode, modep); 188 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s", 189 modep + 1, modep[9] == ' ' ? "" : " ", 190 user_from_uid((unsigned long)sb.st_uid, 0), 191 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); 192 ask = 1; 193 } 194 if (ask) { 195 first = ch = getchar(); 196 while (ch != '\n' && ch != EOF) 197 ch = getchar(); 198 if (first != 'y' && first != 'Y') { 199 (void)fprintf(stderr, "not overwritten\n"); 200 return (0); 201 } 202 } 203 } 204 if (!rename(from, to)) { 205 if (vflg) 206 printf("%s -> %s\n", from, to); 207 return (0); 208 } 209 210 if (errno == EXDEV) { 211 struct statfs sfs; 212 char path[PATH_MAX]; 213 214 /* Can't mv(1) a mount point. */ 215 if (realpath(from, path) == NULL) { 216 warnx("cannot resolve %s: %s", from, path); 217 return (1); 218 } 219 if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) { 220 warnx("cannot rename a mount point"); 221 return (1); 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 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] [-v] source target", 383 " mv [-f | -i] [-v] source ... directory"); 384 exit(EX_USAGE); 385 } 386