1 /* $NetBSD: mv.c,v 1.43 2011/08/29 14:46:54 joerg Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ken Smith of The State University of New York at Buffalo. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\ 38 The Regents of the University of California. All rights reserved."); 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94"; 44 #else 45 __RCSID("$NetBSD: mv.c,v 1.43 2011/08/29 14:46:54 joerg Exp $"); 46 #endif 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 #include <sys/time.h> 51 #include <sys/wait.h> 52 #include <sys/stat.h> 53 #include <sys/extattr.h> 54 55 #include <err.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <grp.h> 59 #include <locale.h> 60 #include <pwd.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 66 #include "pathnames.h" 67 68 static int fflg, iflg, vflg; 69 static int stdin_ok; 70 71 static int copy(char *, char *); 72 static int do_move(char *, char *); 73 static int fastcopy(char *, char *, struct stat *); 74 __dead static void usage(void); 75 76 int 77 main(int argc, char *argv[]) 78 { 79 int ch, len, rval; 80 char *p, *endp; 81 struct stat sb; 82 char path[MAXPATHLEN + 1]; 83 size_t baselen; 84 85 setprogname(argv[0]); 86 (void)setlocale(LC_ALL, ""); 87 88 while ((ch = getopt(argc, argv, "ifv")) != -1) 89 switch (ch) { 90 case 'i': 91 fflg = 0; 92 iflg = 1; 93 break; 94 case 'f': 95 iflg = 0; 96 fflg = 1; 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 stdin_ok = isatty(STDIN_FILENO); 111 112 /* 113 * If the stat on the target fails or the target isn't a directory, 114 * try the move. More than 2 arguments is an error in this case. 115 */ 116 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 117 if (argc > 2) 118 usage(); 119 exit(do_move(argv[0], argv[1])); 120 } 121 122 /* It's a directory, move each file into it. */ 123 baselen = strlcpy(path, argv[argc - 1], sizeof(path)); 124 if (baselen >= sizeof(path)) 125 errx(1, "%s: destination pathname too long", argv[argc - 1]); 126 endp = &path[baselen]; 127 if (!baselen || *(endp - 1) != '/') { 128 *endp++ = '/'; 129 ++baselen; 130 } 131 for (rval = 0; --argc; ++argv) { 132 p = *argv + strlen(*argv) - 1; 133 while (*p == '/' && p != *argv) 134 *p-- = '\0'; 135 if ((p = strrchr(*argv, '/')) == NULL) 136 p = *argv; 137 else 138 ++p; 139 140 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) { 141 warnx("%s: destination pathname too long", *argv); 142 rval = 1; 143 } else { 144 memmove(endp, p, len + 1); 145 if (do_move(*argv, path)) 146 rval = 1; 147 } 148 } 149 exit(rval); 150 /* NOTREACHED */ 151 } 152 153 static int 154 do_move(char *from, char *to) 155 { 156 struct stat sb; 157 char modep[15]; 158 159 /* 160 * (1) If the destination path exists, the -f option is not specified 161 * and either of the following conditions are true: 162 * 163 * (a) The permissions of the destination path do not permit 164 * writing and the standard input is a terminal. 165 * (b) The -i option is specified. 166 * 167 * the mv utility shall write a prompt to standard error and 168 * read a line from standard input. If the response is not 169 * affirmative, mv shall do nothing more with the current 170 * source file... 171 */ 172 if (!fflg && !access(to, F_OK)) { 173 int ask = 1; 174 int ch; 175 176 if (iflg) { 177 if (access(from, F_OK)) { 178 warn("rename %s", from); 179 return (1); 180 } 181 (void)fprintf(stderr, "overwrite %s? ", to); 182 } else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) { 183 if (access(from, F_OK)) { 184 warn("rename %s", from); 185 return (1); 186 } 187 strmode(sb.st_mode, modep); 188 (void)fprintf(stderr, "override %s%s%s/%s for %s? ", 189 modep + 1, modep[9] == ' ' ? "" : " ", 190 user_from_uid(sb.st_uid, 0), 191 group_from_gid(sb.st_gid, 0), to); 192 } else 193 ask = 0; 194 if (ask) { 195 if ((ch = getchar()) != EOF && ch != '\n') { 196 int ch2; 197 while ((ch2 = getchar()) != EOF && ch2 != '\n') 198 continue; 199 } 200 if (ch != 'y' && ch != 'Y') 201 return (0); 202 } 203 } 204 205 /* 206 * (2) If rename() succeeds, mv shall do nothing more with the 207 * current source file. If it fails for any other reason than 208 * EXDEV, mv shall write a diagnostic message to the standard 209 * error and do nothing more with the current source file. 210 * 211 * (3) If the destination path exists, and it is a file of type 212 * directory and source_file is not a file of type directory, 213 * or it is a file not of type directory, and source file is 214 * a file of type directory, mv shall write a diagnostic 215 * message to standard error, and do nothing more with the 216 * current source file... 217 */ 218 if (!rename(from, to)) { 219 if (vflg) 220 printf("%s -> %s\n", from, to); 221 return (0); 222 } 223 224 if (errno != EXDEV) { 225 warn("rename %s to %s", from, to); 226 return (1); 227 } 228 229 /* 230 * (4) If the destination path exists, mv shall attempt to remove it. 231 * If this fails for any reason, mv shall write a diagnostic 232 * message to the standard error and do nothing more with the 233 * current source file... 234 */ 235 if (!lstat(to, &sb)) { 236 if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) { 237 warn("can't remove %s", to); 238 return (1); 239 } 240 } 241 242 /* 243 * (5) The file hierarchy rooted in source_file shall be duplicated 244 * as a file hierarchy rooted in the destination path... 245 */ 246 if (lstat(from, &sb)) { 247 warn("%s", from); 248 return (1); 249 } 250 251 return (S_ISREG(sb.st_mode) ? 252 fastcopy(from, to, &sb) : copy(from, to)); 253 } 254 255 static int 256 fastcopy(char *from, char *to, struct stat *sbp) 257 { 258 struct timeval tval[2]; 259 static blksize_t blen; 260 static char *bp; 261 int nread, from_fd, to_fd; 262 263 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 264 warn("%s", from); 265 return (1); 266 } 267 if ((to_fd = 268 open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) { 269 warn("%s", to); 270 (void)close(from_fd); 271 return (1); 272 } 273 if (!blen && !(bp = malloc(blen = sbp->st_blksize))) { 274 warn(NULL); 275 blen = 0; 276 (void)close(from_fd); 277 (void)close(to_fd); 278 return (1); 279 } 280 while ((nread = read(from_fd, bp, blen)) > 0) 281 if (write(to_fd, bp, nread) != nread) { 282 warn("%s", to); 283 goto err; 284 } 285 if (nread < 0) { 286 warn("%s", from); 287 err: if (unlink(to)) 288 warn("%s: remove", to); 289 (void)close(from_fd); 290 (void)close(to_fd); 291 return (1); 292 } 293 294 #if !defined(__minix) 295 if (fcpxattr(from_fd, to_fd) == -1) 296 warn("%s: error copying extended attributes", to); 297 #endif /* !defined(__minix) */ 298 299 (void)close(from_fd); 300 #ifdef BSD4_4 301 TIMESPEC_TO_TIMEVAL(&tval[0], &sbp->st_atimespec); 302 TIMESPEC_TO_TIMEVAL(&tval[1], &sbp->st_mtimespec); 303 #else 304 tval[0].tv_sec = sbp->st_atime; 305 tval[1].tv_sec = sbp->st_mtime; 306 tval[0].tv_usec = 0; 307 tval[1].tv_usec = 0; 308 #endif 309 #ifdef __SVR4 310 if (utimes(to, tval)) 311 #else 312 if (futimes(to_fd, tval)) 313 #endif 314 warn("%s: set times", to); 315 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 316 if (errno != EPERM) 317 warn("%s: set owner/group", to); 318 sbp->st_mode &= ~(S_ISUID | S_ISGID); 319 } 320 if (fchmod(to_fd, sbp->st_mode)) 321 warn("%s: set mode", to); 322 #if !defined(__minix) 323 if (fchflags(to_fd, sbp->st_flags) && (errno != EOPNOTSUPP)) 324 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 325 #endif /* !defined(__minix) */ 326 327 if (close(to_fd)) { 328 warn("%s", to); 329 return (1); 330 } 331 332 if (unlink(from)) { 333 warn("%s: remove", from); 334 return (1); 335 } 336 337 if (vflg) 338 printf("%s -> %s\n", from, to); 339 340 return (0); 341 } 342 343 static int 344 copy(char *from, char *to) 345 { 346 pid_t pid; 347 int status; 348 349 if ((pid = vfork()) == 0) { 350 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, NULL); 351 warn("%s", _PATH_CP); 352 _exit(1); 353 } 354 if (waitpid(pid, &status, 0) == -1) { 355 warn("%s: waitpid", _PATH_CP); 356 return (1); 357 } 358 if (!WIFEXITED(status)) { 359 warnx("%s: did not terminate normally", _PATH_CP); 360 return (1); 361 } 362 if (WEXITSTATUS(status)) { 363 warnx("%s: terminated with %d (non-zero) status", 364 _PATH_CP, WEXITSTATUS(status)); 365 return (1); 366 } 367 if (!(pid = vfork())) { 368 execl(_PATH_RM, "mv", "-rf", "--", from, NULL); 369 warn("%s", _PATH_RM); 370 _exit(1); 371 } 372 if (waitpid(pid, &status, 0) == -1) { 373 warn("%s: waitpid", _PATH_RM); 374 return (1); 375 } 376 if (!WIFEXITED(status)) { 377 warnx("%s: did not terminate normally", _PATH_RM); 378 return (1); 379 } 380 if (WEXITSTATUS(status)) { 381 warnx("%s: terminated with %d (non-zero) status", 382 _PATH_RM, WEXITSTATUS(status)); 383 return (1); 384 } 385 return (0); 386 } 387 388 static void 389 usage(void) 390 { 391 (void)fprintf(stderr, "usage: %s [-fiv] source target\n" 392 " %s [-fiv] source ... directory\n", getprogname(), 393 getprogname()); 394 exit(1); 395 /* NOTREACHED */ 396 } 397