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