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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California. All rights reserved. 33 * @(#)mv.c 8.2 (Berkeley) 4/2/94 34 * $FreeBSD: /usr/local/www/cvsroot/FreeBSD/src/bin/mv/mv.c,v 1.24.2.6 2004/03/24 08:34:36 pjd Exp $ 35 * $DragonFly: src/bin/mv/mv.c,v 1.14 2007/06/15 07:02:51 corecode Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/time.h> 40 #include <sys/wait.h> 41 #include <sys/stat.h> 42 #include <sys/mount.h> 43 44 #include <err.h> 45 #include <errno.h> 46 #include <fcntl.h> 47 #include <grp.h> 48 #include <limits.h> 49 #include <pwd.h> 50 #include <signal.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <sysexits.h> 55 #include <unistd.h> 56 57 #include "pathnames.h" 58 59 #define mv_pct(x,y) (int)(100.0 * (double)(x) / (double)(y)) 60 61 static int fflg, iflg, nflg, vflg; 62 volatile sig_atomic_t info; 63 64 static int copy(const char *, const char *); 65 static int do_move(const char *, const char *); 66 static int fastcopy(const char *, const char *, struct stat *); 67 static void siginfo(int); 68 static void usage(void); 69 70 int 71 main(int argc, char **argv) 72 { 73 size_t baselen, len; 74 int rval; 75 char *p, *endp; 76 struct stat sb; 77 int ch; 78 char path[PATH_MAX]; 79 80 while ((ch = getopt(argc, argv, "finv")) != -1) 81 switch (ch) { 82 case 'i': 83 iflg = 1; 84 fflg = nflg = 0; 85 break; 86 case 'f': 87 fflg = 1; 88 iflg = nflg = 0; 89 break; 90 case 'n': 91 nflg = 1; 92 fflg = iflg = 0; 93 break; 94 case 'v': 95 vflg = 1; 96 break; 97 default: 98 usage(); 99 } 100 argc -= optind; 101 argv += optind; 102 103 signal(SIGINFO, siginfo); 104 105 if (argc < 2) 106 usage(); 107 108 /* 109 * If the stat on the target fails or the target isn't a directory, 110 * try the move. More than 2 arguments is an error in this case. 111 */ 112 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 113 if (argc > 2) 114 usage(); 115 exit(do_move(argv[0], argv[1])); 116 } 117 118 /* It's a directory, move each file into it. */ 119 if (strlen(argv[argc - 1]) > sizeof(path) - 1) 120 errx(1, "%s: destination pathname too long", *argv); 121 strcpy(path, argv[argc - 1]); 122 baselen = strlen(path); 123 endp = &path[baselen]; 124 if (!baselen || *(endp - 1) != '/') { 125 *endp++ = '/'; 126 ++baselen; 127 } 128 for (rval = 0; --argc; ++argv) { 129 /* 130 * Find the last component of the source pathname. It 131 * may have trailing slashes. 132 */ 133 p = *argv + strlen(*argv); 134 while (p != *argv && p[-1] == '/') 135 --p; 136 while (p != *argv && p[-1] != '/') 137 --p; 138 139 if ((baselen + (len = strlen(p))) >= PATH_MAX) { 140 warnx("%s: destination pathname too long", *argv); 141 rval = 1; 142 } else { 143 memmove(endp, p, (size_t)len + 1); 144 if (do_move(*argv, path)) 145 rval = 1; 146 } 147 } 148 exit(rval); 149 } 150 151 static int 152 do_move(const char *from, const char *to) 153 { 154 struct stat sb; 155 int ask, ch, first; 156 char modep[15]; 157 158 /* 159 * Check access. If interactive and file exists, ask user if it 160 * should be replaced. Otherwise if file exists but isn't writable 161 * make sure the user wants to clobber it. 162 */ 163 if (!fflg && !access(to, F_OK)) { 164 165 /* prompt only if source exist */ 166 if (lstat(from, &sb) == -1) { 167 warn("%s", from); 168 return (1); 169 } 170 171 #define YESNO "(y/n [n]) " 172 ask = 0; 173 if (nflg) { 174 if (vflg) 175 printf("%s not overwritten\n", to); 176 return (0); 177 } else if (iflg) { 178 fprintf(stderr, "overwrite %s? %s", to, YESNO); 179 ask = 1; 180 } else if (access(to, W_OK) && !stat(to, &sb)) { 181 strmode(sb.st_mode, modep); 182 fprintf(stderr, "override %s%s%s/%s for %s? %s", 183 modep + 1, modep[9] == ' ' ? "" : " ", 184 user_from_uid((unsigned long)sb.st_uid, 0), 185 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); 186 ask = 1; 187 } 188 if (ask) { 189 first = ch = getchar(); 190 while (ch != '\n' && ch != EOF) 191 ch = getchar(); 192 if (first != 'y' && first != 'Y') { 193 fprintf(stderr, "not overwritten\n"); 194 return (0); 195 } 196 } 197 } 198 if (!rename(from, to)) { 199 if (vflg) 200 printf("%s -> %s\n", from, to); 201 return (0); 202 } 203 204 if (errno == EXDEV) { 205 struct statfs sfs; 206 char path[PATH_MAX]; 207 208 /* 209 * If the source is a symbolic link and is on another 210 * filesystem, it can be recreated at the destination. 211 */ 212 if (lstat(from, &sb) == -1) { 213 warn("%s", from); 214 return (1); 215 } 216 if (!S_ISLNK(sb.st_mode)) { 217 /* Can't mv(1) a mount point. */ 218 if (realpath(from, path) == NULL) { 219 warnx("cannot resolve %s: %s", from, path); 220 return (1); 221 } 222 if (!statfs(path, &sfs) && 223 !strcmp(path, sfs.f_mntonname)) { 224 warnx("cannot rename a mount point"); 225 return (1); 226 } 227 } 228 } else { 229 warn("rename %s to %s", from, to); 230 return (1); 231 } 232 233 /* 234 * If rename fails because we're trying to cross devices, and 235 * it's a regular file, do the copy internally; otherwise, use 236 * cp and rm. 237 */ 238 if (lstat(from, &sb)) { 239 warn("%s", from); 240 return (1); 241 } 242 return (S_ISREG(sb.st_mode) ? 243 fastcopy(from, to, &sb) : copy(from, to)); 244 } 245 246 static int 247 fastcopy(const char *from, const char *to, struct stat *sbp) 248 { 249 struct timeval tval[2]; 250 static u_int blen; 251 static char *bp; 252 mode_t oldmode; 253 int from_fd, to_fd; 254 size_t nread, wcount; 255 off_t wtotal = 0; 256 257 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 258 warn("%s", from); 259 return (1); 260 } 261 if (blen < sbp->st_blksize) { 262 if (bp != NULL) 263 free(bp); 264 if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) { 265 blen = 0; 266 warnx("malloc failed"); 267 return (1); 268 } 269 blen = sbp->st_blksize; 270 } 271 while ((to_fd = 272 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { 273 if (errno == EEXIST && unlink(to) == 0) 274 continue; 275 warn("%s", to); 276 close(from_fd); 277 return (1); 278 } 279 while ((ssize_t)(nread = read(from_fd, bp, (size_t)blen)) > 0) { 280 wcount = write(to_fd, bp, nread); 281 wtotal += wcount; 282 283 if (wcount != nread) { 284 warn("%s", to); 285 goto err; 286 } 287 288 if (info) { 289 info = 0; 290 fprintf(stderr, "%s -> %s %3d%%\n", 291 from, to, 292 mv_pct(wtotal, sbp->st_size)); 293 } 294 } 295 if ((ssize_t)nread == -1) { 296 warn("%s", from); 297 err: if (unlink(to)) 298 warn("%s: remove", to); 299 close(from_fd); 300 close(to_fd); 301 return (1); 302 } 303 close(from_fd); 304 305 oldmode = sbp->st_mode & ALLPERMS; 306 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 307 warn("%s: set owner/group (was: %lu/%lu)", to, 308 (u_long)sbp->st_uid, (u_long)sbp->st_gid); 309 if (oldmode & (S_ISUID | S_ISGID)) { 310 warnx( 311 "%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", 312 to, oldmode); 313 sbp->st_mode &= ~(S_ISUID | S_ISGID); 314 } 315 } 316 if (fchmod(to_fd, sbp->st_mode)) 317 warn("%s: set mode (was: 0%03o)", to, oldmode); 318 /* 319 * XXX 320 * NFS doesn't support chflags; ignore errors unless there's reason 321 * to believe we're losing bits. (Note, this still won't be right 322 * if the server supports flags and we were trying to *remove* flags 323 * on a file that we copied, i.e., that we didn't create.) 324 */ 325 errno = 0; 326 if (fchflags(to_fd, (u_long)sbp->st_flags)) 327 if (errno != EOPNOTSUPP || sbp->st_flags != 0) 328 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 329 330 tval[0].tv_sec = sbp->st_atime; 331 tval[1].tv_sec = sbp->st_mtime; 332 tval[0].tv_usec = tval[1].tv_usec = 0; 333 if (utimes(to, tval)) 334 warn("%s: set times", to); 335 336 if (close(to_fd)) { 337 warn("%s", to); 338 return (1); 339 } 340 341 if (unlink(from)) { 342 warn("%s: remove", from); 343 return (1); 344 } 345 if (vflg) 346 printf("%s -> %s\n", from, to); 347 return (0); 348 } 349 350 static int 351 copy(const char *from, const char *to) 352 { 353 int status; 354 pid_t pid; 355 356 if ((pid = fork()) == 0) { 357 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, 358 NULL); 359 warn("%s", _PATH_CP); 360 _exit(1); 361 } 362 if (waitpid(pid, &status, 0) == -1) { 363 warn("%s: waitpid", _PATH_CP); 364 return (1); 365 } 366 if (!WIFEXITED(status)) { 367 warnx("%s: did not terminate normally", _PATH_CP); 368 return (1); 369 } 370 if (WEXITSTATUS(status)) { 371 warnx("%s: terminated with %d (non-zero) status", 372 _PATH_CP, WEXITSTATUS(status)); 373 return (1); 374 } 375 if (!(pid = vfork())) { 376 execl(_PATH_RM, "mv", "-rf", "--", from, NULL); 377 warn("%s", _PATH_RM); 378 _exit(1); 379 } 380 if (waitpid(pid, &status, 0) == -1) { 381 warn("%s: waitpid", _PATH_RM); 382 return (1); 383 } 384 if (!WIFEXITED(status)) { 385 warnx("%s: did not terminate normally", _PATH_RM); 386 return (1); 387 } 388 if (WEXITSTATUS(status)) { 389 warnx("%s: terminated with %d (non-zero) status", 390 _PATH_RM, WEXITSTATUS(status)); 391 return (1); 392 } 393 return (0); 394 } 395 396 static void 397 usage(void) 398 { 399 400 fprintf(stderr, "%s\n%s\n", 401 "usage: mv [-f | -i | -n] [-v] source target", 402 " mv [-f | -i | -n] [-v] source ... directory"); 403 exit(EX_USAGE); 404 } 405 406 static void 407 siginfo(int notused __unused) 408 { 409 info = 1; 410 } 411