1/*- 2 * Copyright (c) 1988, 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 * David Hitz of Auspex Systems Inc. 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 * 4. 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 33#if 0 34#ifndef lint 35static char const copyright[] = 36"@(#) Copyright (c) 1988, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41static char sccsid[] = "@(#)cp.c 8.2 (Berkeley) 4/1/94"; 42#endif /* not lint */ 43#endif 44#include <sys/cdefs.h> 45__FBSDID("$FreeBSD: src/bin/cp/cp.c,v 1.52 2005/09/05 04:36:08 csjp Exp $"); 46 47/* 48 * Cp copies source files to target files. 49 * 50 * The global PATH_T structure "to" always contains the path to the 51 * current target file. Since fts(3) does not change directories, 52 * this path can be either absolute or dot-relative. 53 * 54 * The basic algorithm is to initialize "to" and use fts(3) to traverse 55 * the file hierarchy rooted in the argument list. A trivial case is the 56 * case of 'cp file1 file2'. The more interesting case is the case of 57 * 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the 58 * path (relative to the root of the traversal) is appended to dir (stored 59 * in "to") to form the final target path. 60 */ 61 62#include <sys/types.h> 63#include <sys/stat.h> 64 65#include <err.h> 66#include <errno.h> 67#include <fts.h> 68#include <limits.h> 69#include <signal.h> 70#include <stdio.h> 71#include <stdlib.h> 72#include <string.h> 73#include <unistd.h> 74 75#ifdef __APPLE__ 76#include <copyfile.h> 77#include <get_compat.h> 78#else /* !__APPLE__ */ 79#define COMPAT_MODE(a,b) (1) 80#endif /* __APPLE__ */ 81 82#include "extern.h" 83 84#define STRIP_TRAILING_SLASH(p) { \ 85 while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \ 86 *--(p).p_end = 0; \ 87} 88 89static char emptystring[] = ""; 90 91PATH_T to = { to.p_path, emptystring, "" }; 92 93int fflag, iflag, nflag, pflag, vflag; 94#ifdef __APPLE__ 95int Xflag; 96#endif /* __APPLE__ */ 97static int Rflag, rflag; 98volatile sig_atomic_t info; 99 100enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE }; 101 102static int copy(char *[], enum op, int); 103static void siginfo(int __unused); 104 105int 106main(int argc, char *argv[]) 107{ 108 struct stat to_stat, tmp_stat; 109 enum op type; 110 int Hflag, Lflag, Pflag, ch, fts_options, r, have_trailing_slash; 111 char *target; 112 113 Hflag = Lflag = Pflag = 0; 114 while ((ch = getopt(argc, argv, "HLPRXafinprv")) != -1) 115 switch (ch) { 116 case 'H': 117 Hflag = 1; 118 Lflag = Pflag = 0; 119 break; 120 case 'L': 121 Lflag = 1; 122 Hflag = Pflag = 0; 123 break; 124 case 'P': 125 Pflag = 1; 126 Hflag = Lflag = 0; 127 break; 128 case 'R': 129 Rflag = 1; 130 break; 131 case 'X': 132 Xflag = 1; 133 break; 134 case 'f': 135 fflag = 1; 136 /* Determine if the STD is SUSv3 or Legacy */ 137 if (COMPAT_MODE("bin/cp", "unix2003")) 138 nflag = 0; /* reset nflag, but not iflag */ 139 else 140 iflag = nflag = 0; /* reset both */ 141 break; 142 case 'i': 143 iflag = 1; 144 if (COMPAT_MODE("bin/cp", "unix2003")) 145 nflag = 0; /* reset nflag, but not fflag */ 146 else 147 fflag = nflag = 0; 148 break; 149 case 'n': 150 nflag = 1; 151 fflag = iflag = 0; 152 break; 153 case 'p': 154 pflag = 1; 155 break; 156 case 'r': 157 rflag = 1; 158 break; 159 case 'v': 160 vflag = 1; 161 break; 162 case 'a': 163 pflag = 1; 164 Pflag = 1; 165 Rflag = 1; 166 break; 167 default: 168 usage(); 169 break; 170 } 171 argc -= optind; 172 argv += optind; 173 174 if (argc < 2) 175 usage(); 176 177 fts_options = FTS_NOCHDIR | FTS_PHYSICAL; 178 if (rflag) { 179 if (Rflag) 180 errx(1, 181 "the -R and -r options may not be specified together."); 182 if (Hflag || Lflag || Pflag) 183 errx(1, 184 "the -H, -L, and -P options may not be specified with the -r option."); 185 fts_options &= ~FTS_PHYSICAL; 186 fts_options |= FTS_LOGICAL; 187 } 188 if (Rflag) { 189 if (Hflag) 190 fts_options |= FTS_COMFOLLOW; 191 if (Lflag) { 192 fts_options &= ~FTS_PHYSICAL; 193 fts_options |= FTS_LOGICAL; 194 } 195 } else { 196 fts_options &= ~FTS_PHYSICAL; 197 fts_options |= FTS_LOGICAL | FTS_COMFOLLOW; 198 } 199 (void)signal(SIGINFO, siginfo); 200 201 /* Save the target base in "to". */ 202 target = argv[--argc]; 203 if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path)) 204 errx(1, "%s: name too long", target); 205 to.p_end = to.p_path + strlen(to.p_path); 206 if (to.p_path == to.p_end) { 207 *to.p_end++ = '.'; 208 *to.p_end = 0; 209 } 210 have_trailing_slash = (to.p_end[-1] == '/'); 211 if (have_trailing_slash) 212 STRIP_TRAILING_SLASH(to); 213 to.target_end = to.p_end; 214 215 /* Set end of argument list for fts(3). */ 216 argv[argc] = NULL; 217 218 /* 219 * Cp has two distinct cases: 220 * 221 * cp [-R] source target 222 * cp [-R] source1 ... sourceN directory 223 * 224 * In both cases, source can be either a file or a directory. 225 * 226 * In (1), the target becomes a copy of the source. That is, if the 227 * source is a file, the target will be a file, and likewise for 228 * directories. 229 * 230 * In (2), the real target is not directory, but "directory/source". 231 */ 232 r = stat(to.p_path, &to_stat); 233 if (r == -1 && errno != ENOENT) 234 err(1, "%s", to.p_path); 235 if (r == -1 || !S_ISDIR(to_stat.st_mode)) { 236 /* 237 * Case (1). Target is not a directory. 238 */ 239 if (argc > 1) { 240 usage(); 241 exit(1); 242 } 243 /* 244 * Need to detect the case: 245 * cp -R dir foo 246 * Where dir is a directory and foo does not exist, where 247 * we want pathname concatenations turned on but not for 248 * the initial mkdir(). 249 */ 250 if (r == -1) { 251 if (rflag || (Rflag && (Lflag || Hflag))) 252 stat(*argv, &tmp_stat); 253 else 254 lstat(*argv, &tmp_stat); 255 256 if (S_ISDIR(tmp_stat.st_mode) && (Rflag || rflag)) 257 type = DIR_TO_DNE; 258 else 259 type = FILE_TO_FILE; 260 } else 261 type = FILE_TO_FILE; 262 263 if (have_trailing_slash && type == FILE_TO_FILE) { 264 if (r == -1) 265 errx(1, "directory %s does not exist", 266 to.p_path); 267 else 268 errx(1, "%s is not a directory", to.p_path); 269 } 270 } else 271 /* 272 * Case (2). Target is a directory. 273 */ 274 type = FILE_TO_DIR; 275 276 exit (copy(argv, type, fts_options)); 277} 278 279static int 280copy(char *argv[], enum op type, int fts_options) 281{ 282 struct stat to_stat; 283 FTS *ftsp; 284 FTSENT *curr; 285 int base = 0, dne, badcp, rval; 286 size_t nlen; 287 char *p, *target_mid; 288 mode_t mask, mode; 289 290 /* 291 * Keep an inverted copy of the umask, for use in correcting 292 * permissions on created directories when not using -p. 293 */ 294 mask = ~umask(0777); 295 umask(~mask); 296 297 if ((ftsp = fts_open(argv, fts_options, NULL)) == NULL) 298 err(1, "fts_open"); 299 for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) { 300 switch (curr->fts_info) { 301 case FTS_NS: 302 case FTS_DNR: 303 case FTS_ERR: 304 warnx("%s: %s", 305 curr->fts_path, strerror(curr->fts_errno)); 306 rval = 1; 307 continue; 308 case FTS_DC: /* Warn, continue. */ 309 warnx("%s: directory causes a cycle", curr->fts_path); 310 rval = 1; 311 continue; 312 default: 313 ; 314 } 315#ifdef __APPLE__ 316 317#ifdef __clang__ 318#pragma clang diagnostic push 319/* clang doesn't like fts_name[1], but we know better... */ 320#pragma clang diagnostic ignored "-Warray-bounds" 321#endif 322 /* Skip ._<file> when using copyfile and <file> exists */ 323 if ((pflag || !Xflag) && (curr->fts_level != FTS_ROOTLEVEL) && 324 (curr->fts_namelen > 2) && /* ._\0 is not AppleDouble */ 325 (curr->fts_name[0] == '.') && (curr->fts_name[1] == '_')) { 326#ifdef __clang__ 327#pragma clang diagnostic pop 328#endif 329 struct stat statbuf; 330 char path[PATH_MAX]; 331 char *p = strrchr(curr->fts_path, '/'); 332 if (p) { 333 size_t s = p + 2 - curr->fts_path; 334 if (s > sizeof(path)) s = sizeof(path); 335 strlcpy(path, curr->fts_path, s); 336 strlcat(path, curr->fts_name+2, sizeof(path)); 337 } else { 338 strlcpy(path, curr->fts_name+2, sizeof(path)); 339 } 340 if (!lstat(path, &statbuf)) { 341 continue; 342 } 343 } 344#endif /* __APPLE__ */ 345 /* 346 * If we are in case (2) or (3) above, we need to append the 347 * source name to the target name. 348 */ 349 if (type != FILE_TO_FILE) { 350 /* 351 * Need to remember the roots of traversals to create 352 * correct pathnames. If there's a directory being 353 * copied to a non-existent directory, e.g. 354 * cp -R a/dir noexist 355 * the resulting path name should be noexist/foo, not 356 * noexist/dir/foo (where foo is a file in dir), which 357 * is the case where the target exists. 358 * 359 * Also, check for "..". This is for correct path 360 * concatenation for paths ending in "..", e.g. 361 * cp -R .. /tmp 362 * Paths ending in ".." are changed to ".". This is 363 * tricky, but seems the easiest way to fix the problem. 364 * 365 * XXX 366 * Since the first level MUST be FTS_ROOTLEVEL, base 367 * is always initialized. 368 */ 369 if (curr->fts_level == FTS_ROOTLEVEL) { 370 if (type != DIR_TO_DNE) { 371 p = strrchr(curr->fts_path, '/'); 372 base = (p == NULL) ? 0 : 373 (int)(p - curr->fts_path + 1); 374 375 if (!strcmp(&curr->fts_path[base], 376 "..")) 377 base += 1; 378 } else 379 base = curr->fts_pathlen; 380 } 381 382 p = &curr->fts_path[base]; 383 nlen = curr->fts_pathlen - base; 384 target_mid = to.target_end; 385 if (*p != '/' && target_mid[-1] != '/') 386 *target_mid++ = '/'; 387 *target_mid = 0; 388 if (target_mid - to.p_path + nlen >= PATH_MAX) { 389 warnx("%s%s: name too long (not copied)", 390 to.p_path, p); 391 rval = 1; 392 continue; 393 } 394 (void)strncat(target_mid, p, nlen); 395 to.p_end = target_mid + nlen; 396 *to.p_end = 0; 397 STRIP_TRAILING_SLASH(to); 398 } 399 400 if (curr->fts_info == FTS_DP) { 401 /* 402 * We are nearly finished with this directory. If we 403 * didn't actually copy it, or otherwise don't need to 404 * change its attributes, then we are done. 405 */ 406 if (!curr->fts_number) 407 continue; 408 /* 409 * If -p is in effect, set all the attributes. 410 * Otherwise, set the correct permissions, limited 411 * by the umask. Optimise by avoiding a chmod() 412 * if possible (which is usually the case if we 413 * made the directory). Note that mkdir() does not 414 * honour setuid, setgid and sticky bits, but we 415 * normally want to preserve them on directories. 416 */ 417 if (pflag) { 418 if (setfile(curr->fts_statp, -1)) 419 rval = 1; 420#ifdef __APPLE__ 421 /* setfile will fail if writeattr is denied */ 422 if (copyfile(curr->fts_path, to.p_path, NULL, COPYFILE_ACL)<0) 423 warn("%s: unable to copy ACL to %s", curr->fts_path, to.p_path); 424#else /* !__APPLE__ */ 425 if (preserve_dir_acls(curr->fts_statp, 426 curr->fts_accpath, to.p_path) != 0) 427 rval = 1; 428#endif /* __APPLE__ */ 429 } else { 430 mode = curr->fts_statp->st_mode; 431 if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) || 432 ((mode | S_IRWXU) & mask) != (mode & mask)) 433 if (chmod(to.p_path, mode & mask) != 0){ 434 warn("chmod: %s", to.p_path); 435 rval = 1; 436 } 437 } 438 continue; 439 } 440 441 /* Not an error but need to remember it happened */ 442 if (stat(to.p_path, &to_stat) == -1) 443 dne = 1; 444 else { 445 if (to_stat.st_dev == curr->fts_statp->st_dev && 446 to_stat.st_ino == curr->fts_statp->st_ino) { 447 warnx("%s and %s are identical (not copied).", 448 to.p_path, curr->fts_path); 449 rval = 1; 450 if (S_ISDIR(curr->fts_statp->st_mode)) 451 (void)fts_set(ftsp, curr, FTS_SKIP); 452 continue; 453 } 454 if (!S_ISDIR(curr->fts_statp->st_mode) && 455 S_ISDIR(to_stat.st_mode)) { 456 warnx("cannot overwrite directory %s with " 457 "non-directory %s", 458 to.p_path, curr->fts_path); 459 rval = 1; 460 continue; 461 } 462 dne = 0; 463 } 464 465 switch (curr->fts_statp->st_mode & S_IFMT) { 466 case S_IFLNK: 467 /* Catch special case of a non-dangling symlink */ 468 if ((fts_options & FTS_LOGICAL) || 469 ((fts_options & FTS_COMFOLLOW) && 470 curr->fts_level == 0)) { 471 if (copy_file(curr, dne)) 472 badcp = rval = 1; 473 } else { 474 if (copy_link(curr, !dne)) 475 badcp = rval = 1; 476 } 477 break; 478 case S_IFDIR: 479 if (!Rflag && !rflag) { 480 warnx("%s is a directory (not copied).", 481 curr->fts_path); 482 (void)fts_set(ftsp, curr, FTS_SKIP); 483 badcp = rval = 1; 484 break; 485 } 486 /* 487 * If the directory doesn't exist, create the new 488 * one with the from file mode plus owner RWX bits, 489 * modified by the umask. Trade-off between being 490 * able to write the directory (if from directory is 491 * 555) and not causing a permissions race. If the 492 * umask blocks owner writes, we fail.. 493 */ 494 if (dne) { 495 if (mkdir(to.p_path, 496 curr->fts_statp->st_mode | S_IRWXU) < 0) { 497 if (COMPAT_MODE("bin/cp", "unix2003")) { 498 warn("%s", to.p_path); 499 } else { 500 err(1, "%s", to.p_path); 501 } 502 } 503 } else if (!S_ISDIR(to_stat.st_mode)) { 504 errno = ENOTDIR; 505 if (COMPAT_MODE("bin/cp", "unix2003")) { 506 warn("%s", to.p_path); 507 } else { 508 err(1, "%s", to.p_path); 509 } 510 } 511 /* 512 * Arrange to correct directory attributes later 513 * (in the post-order phase) if this is a new 514 * directory, or if the -p flag is in effect. 515 */ 516 curr->fts_number = pflag || dne; 517#ifdef __APPLE__ 518 if (!Xflag) { 519 if (copyfile(curr->fts_path, to.p_path, NULL, COPYFILE_XATTR) < 0) 520 warn("%s: unable to copy extended attributes to %s", curr->fts_path, to.p_path); 521 /* ACL and mtime set in postorder traversal */ 522 } 523#endif /* __APPLE__ */ 524 break; 525 case S_IFBLK: 526 case S_IFCHR: 527 if (Rflag) { 528 if (copy_special(curr->fts_statp, !dne)) 529 badcp = rval = 1; 530 } else { 531 if (copy_file(curr, dne)) 532 badcp = rval = 1; 533 } 534 break; 535 case S_IFIFO: 536 if (Rflag) { 537 if (copy_fifo(curr->fts_statp, !dne)) 538 badcp = rval = 1; 539 } else { 540 if (copy_file(curr, dne)) 541 badcp = rval = 1; 542 } 543 break; 544 default: 545 if (copy_file(curr, dne)) 546 badcp = rval = 1; 547 break; 548 } 549 if (vflag && !badcp) 550 (void)printf("%s -> %s\n", curr->fts_path, to.p_path); 551 } 552 if (errno) 553 err(1, "fts_read"); 554 fts_close(ftsp); 555 return (rval); 556} 557 558static void 559siginfo(int sig __unused) 560{ 561 562 info = 1; 563} 564