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 <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <sysexits.h> 64 #include <unistd.h> 65 66 #include "pathnames.h" 67 68 int fflg, iflg, vflg; 69 70 int copy __P((char *, char *)); 71 int do_move __P((char *, char *)); 72 int fastcopy __P((char *, char *, struct stat *)); 73 void usage __P((void)); 74 75 int 76 main(argc, argv) 77 int argc; 78 char *argv[]; 79 { 80 register int baselen, len, rval; 81 register char *p, *endp; 82 struct stat sb; 83 int ch; 84 char path[MAXPATHLEN]; 85 86 while ((ch = getopt(argc, argv, "fiv")) != -1) 87 switch (ch) { 88 case 'i': 89 iflg = 1; 90 fflg = 0; 91 break; 92 case 'f': 93 fflg = 1; 94 iflg = 0; 95 break; 96 case 'v': 97 vflg = 1; 98 break; 99 default: 100 usage(); 101 } 102 argc -= optind; 103 argv += optind; 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 (void)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))) >= MAXPATHLEN) { 140 warnx("%s: destination pathname too long", *argv); 141 rval = 1; 142 } else { 143 memmove(endp, p, len + 1); 144 if (do_move(*argv, path)) 145 rval = 1; 146 } 147 } 148 exit(rval); 149 } 150 151 int 152 do_move(from, to) 153 char *from, *to; 154 { 155 struct stat sb; 156 int ask, ch, first; 157 char modep[15]; 158 159 /* 160 * Check access. If interactive and file exists, ask user if it 161 * should be replaced. Otherwise if file exists but isn't writable 162 * make sure the user wants to clobber it. 163 */ 164 if (!fflg && !access(to, F_OK)) { 165 166 /* prompt only if source exist */ 167 if (lstat(from, &sb) == -1) { 168 warn("%s", from); 169 return (1); 170 } 171 172 #define YESNO "(y/n [n]) " 173 ask = 0; 174 if (iflg) { 175 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO); 176 ask = 1; 177 } else if (access(to, W_OK) && !stat(to, &sb)) { 178 strmode(sb.st_mode, modep); 179 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s", 180 modep + 1, modep[9] == ' ' ? "" : " ", 181 user_from_uid(sb.st_uid, 0), 182 group_from_gid(sb.st_gid, 0), to, YESNO); 183 ask = 1; 184 } 185 if (ask) { 186 first = ch = getchar(); 187 while (ch != '\n' && ch != EOF) 188 ch = getchar(); 189 if (first != 'y' && first != 'Y') { 190 (void)fprintf(stderr, "not overwritten\n"); 191 return (0); 192 } 193 } 194 } 195 if (!rename(from, to)) { 196 if (vflg) 197 printf("%s -> %s\n", from, to); 198 return (0); 199 } 200 201 if (errno == EXDEV) { 202 struct statfs sfs; 203 char path[MAXPATHLEN]; 204 205 /* Can't mv(1) a mount point. */ 206 if (realpath(from, path) == NULL) { 207 warnx("cannot resolve %s: %s", from, path); 208 return (1); 209 } 210 if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) { 211 warnx("cannot rename a mount point"); 212 return (1); 213 } 214 } else { 215 warn("rename %s to %s", from, to); 216 return (1); 217 } 218 219 /* 220 * If rename fails because we're trying to cross devices, and 221 * it's a regular file, do the copy internally; otherwise, use 222 * cp and rm. 223 */ 224 if (stat(from, &sb)) { 225 warn("%s", from); 226 return (1); 227 } 228 return (S_ISREG(sb.st_mode) ? 229 fastcopy(from, to, &sb) : copy(from, to)); 230 } 231 232 int 233 fastcopy(from, to, sbp) 234 char *from, *to; 235 struct stat *sbp; 236 { 237 struct timeval tval[2]; 238 static u_int blen; 239 static char *bp; 240 mode_t oldmode; 241 register int nread, from_fd, to_fd; 242 243 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 244 warn("%s", from); 245 return (1); 246 } 247 if (blen < sbp->st_blksize) { 248 if (bp != NULL) 249 free(bp); 250 if ((bp = malloc(sbp->st_blksize)) == NULL) { 251 blen = 0; 252 warnx("malloc failed"); 253 return (1); 254 } 255 blen = sbp->st_blksize; 256 } 257 while ((to_fd = 258 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { 259 if (errno == EEXIST && unlink(to) == 0) 260 continue; 261 warn("%s", to); 262 (void)close(from_fd); 263 return (1); 264 } 265 while ((nread = read(from_fd, bp, blen)) > 0) 266 if (write(to_fd, bp, nread) != nread) { 267 warn("%s", to); 268 goto err; 269 } 270 if (nread < 0) { 271 warn("%s", from); 272 err: if (unlink(to)) 273 warn("%s: remove", to); 274 (void)close(from_fd); 275 (void)close(to_fd); 276 return (1); 277 } 278 (void)close(from_fd); 279 280 oldmode = sbp->st_mode & ALLPERMS; 281 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 282 warn("%s: set owner/group (was: %lu/%lu)", to, 283 (u_long)sbp->st_uid, (u_long)sbp->st_gid); 284 if (oldmode & (S_ISUID | S_ISGID)) { 285 warnx( 286 "%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", 287 to, oldmode); 288 sbp->st_mode &= ~(S_ISUID | S_ISGID); 289 } 290 } 291 if (fchmod(to_fd, sbp->st_mode)) 292 warn("%s: set mode (was: 0%03o)", to, oldmode); 293 294 tval[0].tv_sec = sbp->st_atime; 295 tval[1].tv_sec = sbp->st_mtime; 296 tval[0].tv_usec = tval[1].tv_usec = 0; 297 if (utimes(to, tval)) 298 warn("%s: set times", to); 299 300 if (close(to_fd)) { 301 warn("%s", to); 302 return (1); 303 } 304 305 if (unlink(from)) { 306 warn("%s: remove", from); 307 return (1); 308 } 309 if (vflg) 310 printf("%s -> %s\n", from, to); 311 return (0); 312 } 313 314 int 315 copy(from, to) 316 char *from, *to; 317 { 318 int pid, status; 319 320 if ((pid = fork()) == 0) { 321 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", from, to, NULL); 322 warn("%s", _PATH_CP); 323 _exit(1); 324 } 325 if (waitpid(pid, &status, 0) == -1) { 326 warn("%s: waitpid", _PATH_CP); 327 return (1); 328 } 329 if (!WIFEXITED(status)) { 330 warn("%s: did not terminate normally", _PATH_CP); 331 return (1); 332 } 333 if (WEXITSTATUS(status)) { 334 warn("%s: terminated with %d (non-zero) status", 335 _PATH_CP, WEXITSTATUS(status)); 336 return (1); 337 } 338 if (!(pid = vfork())) { 339 execl(_PATH_RM, "mv", "-rf", from, NULL); 340 warn("%s", _PATH_RM); 341 _exit(1); 342 } 343 if (waitpid(pid, &status, 0) == -1) { 344 warn("%s: waitpid", _PATH_RM); 345 return (1); 346 } 347 if (!WIFEXITED(status)) { 348 warn("%s: did not terminate normally", _PATH_RM); 349 return (1); 350 } 351 if (WEXITSTATUS(status)) { 352 warn("%s: terminated with %d (non-zero) status", 353 _PATH_RM, WEXITSTATUS(status)); 354 return (1); 355 } 356 return (0); 357 } 358 359 void 360 usage() 361 { 362 363 (void)fprintf(stderr, "%s\n%s\n", 364 "usage: mv [-f | -i] [-v] source target", 365 " mv [-f | -i] [-v] source ... directory"); 366 exit(EX_USAGE); 367 } 368