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