1 /*- 2 * Copyright (c) 2003-2009 Tim Kientzle 3 * Copyright (c) 2010-2012 Michihiro NAKAJIMA 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "archive_platform.h" 28 __FBSDID("$FreeBSD: head/lib/libarchive/archive_read_disk_entry_from_file.c 201084 2009-12-28 02:14:09Z kientzle $"); 29 30 /* This is the tree-walking code for POSIX systems. */ 31 #if !defined(_WIN32) || defined(__CYGWIN__) 32 33 #ifdef HAVE_SYS_TYPES_H 34 /* Mac OSX requires sys/types.h before sys/acl.h. */ 35 #include <sys/types.h> 36 #endif 37 #ifdef HAVE_SYS_ACL_H 38 #include <sys/acl.h> 39 #endif 40 #ifdef HAVE_SYS_EXTATTR_H 41 #include <sys/extattr.h> 42 #endif 43 #ifdef HAVE_SYS_IOCTL_H 44 #include <sys/ioctl.h> 45 #endif 46 #ifdef HAVE_SYS_PARAM_H 47 #include <sys/param.h> 48 #endif 49 #ifdef HAVE_SYS_STAT_H 50 #include <sys/stat.h> 51 #endif 52 #if defined(HAVE_SYS_XATTR_H) 53 #include <sys/xattr.h> 54 #elif defined(HAVE_ATTR_XATTR_H) 55 #include <attr/xattr.h> 56 #endif 57 #ifdef HAVE_SYS_EA_H 58 #include <sys/ea.h> 59 #endif 60 #ifdef HAVE_ACL_LIBACL_H 61 #include <acl/libacl.h> 62 #endif 63 #ifdef HAVE_COPYFILE_H 64 #include <copyfile.h> 65 #endif 66 #ifdef HAVE_ERRNO_H 67 #include <errno.h> 68 #endif 69 #ifdef HAVE_FCNTL_H 70 #include <fcntl.h> 71 #endif 72 #ifdef HAVE_LIMITS_H 73 #include <limits.h> 74 #endif 75 #ifdef HAVE_LINUX_TYPES_H 76 #include <linux/types.h> 77 #endif 78 #ifdef HAVE_LINUX_FIEMAP_H 79 #include <linux/fiemap.h> 80 #endif 81 #ifdef HAVE_LINUX_FS_H 82 #include <linux/fs.h> 83 #endif 84 /* 85 * Some Linux distributions have both linux/ext2_fs.h and ext2fs/ext2_fs.h. 86 * As the include guards don't agree, the order of include is important. 87 */ 88 #ifdef HAVE_LINUX_EXT2_FS_H 89 #include <linux/ext2_fs.h> /* for Linux file flags */ 90 #endif 91 #if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__) 92 #include <ext2fs/ext2_fs.h> /* Linux file flags, broken on Cygwin */ 93 #endif 94 #ifdef HAVE_PATHS_H 95 #include <paths.h> 96 #endif 97 #ifdef HAVE_UNISTD_H 98 #include <unistd.h> 99 #endif 100 101 #include "archive.h" 102 #include "archive_entry.h" 103 #include "archive_private.h" 104 #include "archive_read_disk_private.h" 105 106 #ifndef O_CLOEXEC 107 #define O_CLOEXEC 0 108 #endif 109 110 /* 111 * Linux and FreeBSD plug this obvious hole in POSIX.1e in 112 * different ways. 113 */ 114 #if HAVE_ACL_GET_PERM 115 #define ACL_GET_PERM acl_get_perm 116 #elif HAVE_ACL_GET_PERM_NP 117 #define ACL_GET_PERM acl_get_perm_np 118 #endif 119 120 static int setup_acls(struct archive_read_disk *, 121 struct archive_entry *, int *fd); 122 static int setup_mac_metadata(struct archive_read_disk *, 123 struct archive_entry *, int *fd); 124 static int setup_xattrs(struct archive_read_disk *, 125 struct archive_entry *, int *fd); 126 static int setup_sparse(struct archive_read_disk *, 127 struct archive_entry *, int *fd); 128 129 int 130 archive_read_disk_entry_from_file(struct archive *_a, 131 struct archive_entry *entry, 132 int fd, 133 const struct stat *st) 134 { 135 struct archive_read_disk *a = (struct archive_read_disk *)_a; 136 const char *path, *name; 137 struct stat s; 138 int initial_fd = fd; 139 int r, r1; 140 141 archive_clear_error(_a); 142 path = archive_entry_sourcepath(entry); 143 if (path == NULL) 144 path = archive_entry_pathname(entry); 145 146 if (a->tree == NULL) { 147 if (st == NULL) { 148 #if HAVE_FSTAT 149 if (fd >= 0) { 150 if (fstat(fd, &s) != 0) { 151 archive_set_error(&a->archive, errno, 152 "Can't fstat"); 153 return (ARCHIVE_FAILED); 154 } 155 } else 156 #endif 157 #if HAVE_LSTAT 158 if (!a->follow_symlinks) { 159 if (lstat(path, &s) != 0) { 160 archive_set_error(&a->archive, errno, 161 "Can't lstat %s", path); 162 return (ARCHIVE_FAILED); 163 } 164 } else 165 #endif 166 if (stat(path, &s) != 0) { 167 archive_set_error(&a->archive, errno, 168 "Can't stat %s", path); 169 return (ARCHIVE_FAILED); 170 } 171 st = &s; 172 } 173 archive_entry_copy_stat(entry, st); 174 } 175 176 /* Lookup uname/gname */ 177 name = archive_read_disk_uname(_a, archive_entry_uid(entry)); 178 if (name != NULL) 179 archive_entry_copy_uname(entry, name); 180 name = archive_read_disk_gname(_a, archive_entry_gid(entry)); 181 if (name != NULL) 182 archive_entry_copy_gname(entry, name); 183 184 #ifdef HAVE_STRUCT_STAT_ST_FLAGS 185 /* On FreeBSD, we get flags for free with the stat. */ 186 /* TODO: Does this belong in copy_stat()? */ 187 if (st->st_flags != 0) 188 archive_entry_set_fflags(entry, st->st_flags, 0); 189 #endif 190 191 #if defined(EXT2_IOC_GETFLAGS) && defined(HAVE_WORKING_EXT2_IOC_GETFLAGS) 192 /* Linux requires an extra ioctl to pull the flags. Although 193 * this is an extra step, it has a nice side-effect: We get an 194 * open file descriptor which we can use in the subsequent lookups. */ 195 if ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode))) { 196 if (fd < 0) { 197 if (a->tree != NULL) 198 fd = a->open_on_current_dir(a->tree, path, 199 O_RDONLY | O_NONBLOCK | O_CLOEXEC); 200 else 201 fd = open(path, O_RDONLY | O_NONBLOCK | 202 O_CLOEXEC); 203 __archive_ensure_cloexec_flag(fd); 204 } 205 if (fd >= 0) { 206 int stflags; 207 r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags); 208 if (r == 0 && stflags != 0) 209 archive_entry_set_fflags(entry, stflags, 0); 210 } 211 } 212 #endif 213 214 #if defined(HAVE_READLINK) || defined(HAVE_READLINKAT) 215 if (S_ISLNK(st->st_mode)) { 216 size_t linkbuffer_len = st->st_size + 1; 217 char *linkbuffer; 218 int lnklen; 219 220 linkbuffer = malloc(linkbuffer_len); 221 if (linkbuffer == NULL) { 222 archive_set_error(&a->archive, ENOMEM, 223 "Couldn't read link data"); 224 return (ARCHIVE_FAILED); 225 } 226 if (a->tree != NULL) { 227 #ifdef HAVE_READLINKAT 228 lnklen = readlinkat(a->tree_current_dir_fd(a->tree), 229 path, linkbuffer, linkbuffer_len); 230 #else 231 if (a->tree_enter_working_dir(a->tree) != 0) { 232 archive_set_error(&a->archive, errno, 233 "Couldn't read link data"); 234 free(linkbuffer); 235 return (ARCHIVE_FAILED); 236 } 237 lnklen = readlink(path, linkbuffer, linkbuffer_len); 238 #endif /* HAVE_READLINKAT */ 239 } else 240 lnklen = readlink(path, linkbuffer, linkbuffer_len); 241 if (lnklen < 0) { 242 archive_set_error(&a->archive, errno, 243 "Couldn't read link data"); 244 free(linkbuffer); 245 return (ARCHIVE_FAILED); 246 } 247 linkbuffer[lnklen] = 0; 248 archive_entry_set_symlink(entry, linkbuffer); 249 free(linkbuffer); 250 } 251 #endif /* HAVE_READLINK || HAVE_READLINKAT */ 252 253 r = setup_acls(a, entry, &fd); 254 if (!a->suppress_xattr) { 255 r1 = setup_xattrs(a, entry, &fd); 256 if (r1 < r) 257 r = r1; 258 } 259 if (a->enable_copyfile) { 260 r1 = setup_mac_metadata(a, entry, &fd); 261 if (r1 < r) 262 r = r1; 263 } 264 r1 = setup_sparse(a, entry, &fd); 265 if (r1 < r) 266 r = r1; 267 268 /* If we opened the file earlier in this function, close it. */ 269 if (initial_fd != fd) 270 close(fd); 271 return (r); 272 } 273 274 #if defined(__APPLE__) && defined(HAVE_COPYFILE_H) 275 /* 276 * The Mac OS "copyfile()" API copies the extended metadata for a 277 * file into a separate file in AppleDouble format (see RFC 1740). 278 * 279 * Mac OS tar and cpio implementations store this extended 280 * metadata as a separate entry just before the regular entry 281 * with a "._" prefix added to the filename. 282 * 283 * Note that this is currently done unconditionally; the tar program has 284 * an option to discard this information before the archive is written. 285 * 286 * TODO: If there's a failure, report it and return ARCHIVE_WARN. 287 */ 288 static int 289 setup_mac_metadata(struct archive_read_disk *a, 290 struct archive_entry *entry, int *fd) 291 { 292 int tempfd = -1; 293 int copyfile_flags = COPYFILE_NOFOLLOW | COPYFILE_ACL | COPYFILE_XATTR; 294 struct stat copyfile_stat; 295 int ret = ARCHIVE_OK; 296 void *buff = NULL; 297 int have_attrs; 298 const char *name, *tempdir; 299 struct archive_string tempfile; 300 301 (void)fd; /* UNUSED */ 302 name = archive_entry_sourcepath(entry); 303 if (name == NULL) 304 name = archive_entry_pathname(entry); 305 if (name == NULL) { 306 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 307 "Can't open file to read extended attributes: No name"); 308 return (ARCHIVE_WARN); 309 } 310 311 if (a->tree != NULL) { 312 if (a->tree_enter_working_dir(a->tree) != 0) { 313 archive_set_error(&a->archive, errno, 314 "Couldn't change dir"); 315 return (ARCHIVE_FAILED); 316 } 317 } 318 319 /* Short-circuit if there's nothing to do. */ 320 have_attrs = copyfile(name, NULL, 0, copyfile_flags | COPYFILE_CHECK); 321 if (have_attrs == -1) { 322 archive_set_error(&a->archive, errno, 323 "Could not check extended attributes"); 324 return (ARCHIVE_WARN); 325 } 326 if (have_attrs == 0) 327 return (ARCHIVE_OK); 328 329 tempdir = NULL; 330 if (issetugid() == 0) 331 tempdir = getenv("TMPDIR"); 332 if (tempdir == NULL) 333 tempdir = _PATH_TMP; 334 archive_string_init(&tempfile); 335 archive_strcpy(&tempfile, tempdir); 336 archive_strcat(&tempfile, "tar.md.XXXXXX"); 337 tempfd = mkstemp(tempfile.s); 338 if (tempfd < 0) { 339 archive_set_error(&a->archive, errno, 340 "Could not open extended attribute file"); 341 ret = ARCHIVE_WARN; 342 goto cleanup; 343 } 344 __archive_ensure_cloexec_flag(tempfd); 345 346 /* XXX I wish copyfile() could pack directly to a memory 347 * buffer; that would avoid the temp file here. For that 348 * matter, it would be nice if fcopyfile() actually worked, 349 * that would reduce the many open/close races here. */ 350 if (copyfile(name, tempfile.s, 0, copyfile_flags | COPYFILE_PACK)) { 351 archive_set_error(&a->archive, errno, 352 "Could not pack extended attributes"); 353 ret = ARCHIVE_WARN; 354 goto cleanup; 355 } 356 if (fstat(tempfd, ©file_stat)) { 357 archive_set_error(&a->archive, errno, 358 "Could not check size of extended attributes"); 359 ret = ARCHIVE_WARN; 360 goto cleanup; 361 } 362 buff = malloc(copyfile_stat.st_size); 363 if (buff == NULL) { 364 archive_set_error(&a->archive, errno, 365 "Could not allocate memory for extended attributes"); 366 ret = ARCHIVE_WARN; 367 goto cleanup; 368 } 369 if (copyfile_stat.st_size != read(tempfd, buff, copyfile_stat.st_size)) { 370 archive_set_error(&a->archive, errno, 371 "Could not read extended attributes into memory"); 372 ret = ARCHIVE_WARN; 373 goto cleanup; 374 } 375 archive_entry_copy_mac_metadata(entry, buff, copyfile_stat.st_size); 376 377 cleanup: 378 if (tempfd >= 0) { 379 close(tempfd); 380 unlink(tempfile.s); 381 } 382 archive_string_free(&tempfile); 383 free(buff); 384 return (ret); 385 } 386 387 #else 388 389 /* 390 * Stub implementation for non-Mac systems. 391 */ 392 static int 393 setup_mac_metadata(struct archive_read_disk *a, 394 struct archive_entry *entry, int *fd) 395 { 396 (void)a; /* UNUSED */ 397 (void)entry; /* UNUSED */ 398 (void)fd; /* UNUSED */ 399 return (ARCHIVE_OK); 400 } 401 #endif 402 403 404 #ifdef HAVE_POSIX_ACL 405 static int translate_acl(struct archive_read_disk *a, 406 struct archive_entry *entry, acl_t acl, int archive_entry_acl_type); 407 408 static int 409 setup_acls(struct archive_read_disk *a, 410 struct archive_entry *entry, int *fd) 411 { 412 const char *accpath; 413 acl_t acl; 414 #if HAVE_ACL_IS_TRIVIAL_NP 415 int r; 416 #endif 417 418 accpath = archive_entry_sourcepath(entry); 419 if (accpath == NULL) 420 accpath = archive_entry_pathname(entry); 421 422 archive_entry_acl_clear(entry); 423 424 #ifdef ACL_TYPE_NFS4 425 /* Try NFS4 ACL first. */ 426 if (*fd >= 0) 427 acl = acl_get_fd(*fd); 428 #if HAVE_ACL_GET_LINK_NP 429 else if (!a->follow_symlinks) 430 acl = acl_get_link_np(accpath, ACL_TYPE_NFS4); 431 #else 432 else if ((!a->follow_symlinks) 433 && (archive_entry_filetype(entry) == AE_IFLNK)) 434 /* We can't get the ACL of a symlink, so we assume it can't 435 have one. */ 436 acl = NULL; 437 #endif 438 else 439 acl = acl_get_file(accpath, ACL_TYPE_NFS4); 440 #if HAVE_ACL_IS_TRIVIAL_NP 441 /* Ignore "trivial" ACLs that just mirror the file mode. */ 442 acl_is_trivial_np(acl, &r); 443 if (r) { 444 acl_free(acl); 445 acl = NULL; 446 } 447 #endif 448 if (acl != NULL) { 449 translate_acl(a, entry, acl, ARCHIVE_ENTRY_ACL_TYPE_NFS4); 450 acl_free(acl); 451 return (ARCHIVE_OK); 452 } 453 #endif 454 455 /* Retrieve access ACL from file. */ 456 if (*fd >= 0) 457 acl = acl_get_fd(*fd); 458 #if HAVE_ACL_GET_LINK_NP 459 else if (!a->follow_symlinks) 460 acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS); 461 #else 462 else if ((!a->follow_symlinks) 463 && (archive_entry_filetype(entry) == AE_IFLNK)) 464 /* We can't get the ACL of a symlink, so we assume it can't 465 have one. */ 466 acl = NULL; 467 #endif 468 else 469 acl = acl_get_file(accpath, ACL_TYPE_ACCESS); 470 if (acl != NULL) { 471 translate_acl(a, entry, acl, 472 ARCHIVE_ENTRY_ACL_TYPE_ACCESS); 473 acl_free(acl); 474 } 475 476 /* Only directories can have default ACLs. */ 477 if (S_ISDIR(archive_entry_mode(entry))) { 478 acl = acl_get_file(accpath, ACL_TYPE_DEFAULT); 479 if (acl != NULL) { 480 translate_acl(a, entry, acl, 481 ARCHIVE_ENTRY_ACL_TYPE_DEFAULT); 482 acl_free(acl); 483 } 484 } 485 return (ARCHIVE_OK); 486 } 487 488 /* 489 * Translate system ACL into libarchive internal structure. 490 */ 491 492 static struct { 493 int archive_perm; 494 int platform_perm; 495 } acl_perm_map[] = { 496 {ARCHIVE_ENTRY_ACL_EXECUTE, ACL_EXECUTE}, 497 {ARCHIVE_ENTRY_ACL_WRITE, ACL_WRITE}, 498 {ARCHIVE_ENTRY_ACL_READ, ACL_READ}, 499 #ifdef ACL_TYPE_NFS4 500 {ARCHIVE_ENTRY_ACL_READ_DATA, ACL_READ_DATA}, 501 {ARCHIVE_ENTRY_ACL_LIST_DIRECTORY, ACL_LIST_DIRECTORY}, 502 {ARCHIVE_ENTRY_ACL_WRITE_DATA, ACL_WRITE_DATA}, 503 {ARCHIVE_ENTRY_ACL_ADD_FILE, ACL_ADD_FILE}, 504 {ARCHIVE_ENTRY_ACL_APPEND_DATA, ACL_APPEND_DATA}, 505 {ARCHIVE_ENTRY_ACL_ADD_SUBDIRECTORY, ACL_ADD_SUBDIRECTORY}, 506 {ARCHIVE_ENTRY_ACL_READ_NAMED_ATTRS, ACL_READ_NAMED_ATTRS}, 507 {ARCHIVE_ENTRY_ACL_WRITE_NAMED_ATTRS, ACL_WRITE_NAMED_ATTRS}, 508 {ARCHIVE_ENTRY_ACL_DELETE_CHILD, ACL_DELETE_CHILD}, 509 {ARCHIVE_ENTRY_ACL_READ_ATTRIBUTES, ACL_READ_ATTRIBUTES}, 510 {ARCHIVE_ENTRY_ACL_WRITE_ATTRIBUTES, ACL_WRITE_ATTRIBUTES}, 511 {ARCHIVE_ENTRY_ACL_DELETE, ACL_DELETE}, 512 {ARCHIVE_ENTRY_ACL_READ_ACL, ACL_READ_ACL}, 513 {ARCHIVE_ENTRY_ACL_WRITE_ACL, ACL_WRITE_ACL}, 514 {ARCHIVE_ENTRY_ACL_WRITE_OWNER, ACL_WRITE_OWNER}, 515 {ARCHIVE_ENTRY_ACL_SYNCHRONIZE, ACL_SYNCHRONIZE} 516 #endif 517 }; 518 519 #ifdef ACL_TYPE_NFS4 520 static struct { 521 int archive_inherit; 522 int platform_inherit; 523 } acl_inherit_map[] = { 524 {ARCHIVE_ENTRY_ACL_ENTRY_FILE_INHERIT, ACL_ENTRY_FILE_INHERIT}, 525 {ARCHIVE_ENTRY_ACL_ENTRY_DIRECTORY_INHERIT, ACL_ENTRY_DIRECTORY_INHERIT}, 526 {ARCHIVE_ENTRY_ACL_ENTRY_NO_PROPAGATE_INHERIT, ACL_ENTRY_NO_PROPAGATE_INHERIT}, 527 {ARCHIVE_ENTRY_ACL_ENTRY_INHERIT_ONLY, ACL_ENTRY_INHERIT_ONLY} 528 }; 529 #endif 530 static int 531 translate_acl(struct archive_read_disk *a, 532 struct archive_entry *entry, acl_t acl, int default_entry_acl_type) 533 { 534 acl_tag_t acl_tag; 535 #ifdef ACL_TYPE_NFS4 536 acl_entry_type_t acl_type; 537 acl_flagset_t acl_flagset; 538 int brand, r; 539 #endif 540 acl_entry_t acl_entry; 541 acl_permset_t acl_permset; 542 int i, entry_acl_type; 543 int s, ae_id, ae_tag, ae_perm; 544 const char *ae_name; 545 546 547 #ifdef ACL_TYPE_NFS4 548 // FreeBSD "brands" ACLs as POSIX.1e or NFSv4 549 // Make sure the "brand" on this ACL is consistent 550 // with the default_entry_acl_type bits provided. 551 acl_get_brand_np(acl, &brand); 552 switch (brand) { 553 case ACL_BRAND_POSIX: 554 switch (default_entry_acl_type) { 555 case ARCHIVE_ENTRY_ACL_TYPE_ACCESS: 556 case ARCHIVE_ENTRY_ACL_TYPE_DEFAULT: 557 break; 558 default: 559 // XXX set warning message? 560 return ARCHIVE_FAILED; 561 } 562 break; 563 case ACL_BRAND_NFS4: 564 if (default_entry_acl_type & ~ARCHIVE_ENTRY_ACL_TYPE_NFS4) { 565 // XXX set warning message? 566 return ARCHIVE_FAILED; 567 } 568 break; 569 default: 570 // XXX set warning message? 571 return ARCHIVE_FAILED; 572 break; 573 } 574 #endif 575 576 577 s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry); 578 while (s == 1) { 579 ae_id = -1; 580 ae_name = NULL; 581 ae_perm = 0; 582 583 acl_get_tag_type(acl_entry, &acl_tag); 584 switch (acl_tag) { 585 case ACL_USER: 586 ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry); 587 ae_name = archive_read_disk_uname(&a->archive, ae_id); 588 ae_tag = ARCHIVE_ENTRY_ACL_USER; 589 break; 590 case ACL_GROUP: 591 ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry); 592 ae_name = archive_read_disk_gname(&a->archive, ae_id); 593 ae_tag = ARCHIVE_ENTRY_ACL_GROUP; 594 break; 595 case ACL_MASK: 596 ae_tag = ARCHIVE_ENTRY_ACL_MASK; 597 break; 598 case ACL_USER_OBJ: 599 ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ; 600 break; 601 case ACL_GROUP_OBJ: 602 ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ; 603 break; 604 case ACL_OTHER: 605 ae_tag = ARCHIVE_ENTRY_ACL_OTHER; 606 break; 607 #ifdef ACL_TYPE_NFS4 608 case ACL_EVERYONE: 609 ae_tag = ARCHIVE_ENTRY_ACL_EVERYONE; 610 break; 611 #endif 612 default: 613 /* Skip types that libarchive can't support. */ 614 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry); 615 continue; 616 } 617 618 // XXX acl type maps to allow/deny/audit/YYYY bits 619 // XXX acl_get_entry_type_np on FreeBSD returns EINVAL for 620 // non-NFSv4 ACLs 621 entry_acl_type = default_entry_acl_type; 622 #ifdef ACL_TYPE_NFS4 623 r = acl_get_entry_type_np(acl_entry, &acl_type); 624 if (r == 0) { 625 switch (acl_type) { 626 case ACL_ENTRY_TYPE_ALLOW: 627 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALLOW; 628 break; 629 case ACL_ENTRY_TYPE_DENY: 630 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_DENY; 631 break; 632 case ACL_ENTRY_TYPE_AUDIT: 633 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_AUDIT; 634 break; 635 case ACL_ENTRY_TYPE_ALARM: 636 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALARM; 637 break; 638 } 639 } 640 641 /* 642 * Libarchive stores "flag" (NFSv4 inheritance bits) 643 * in the ae_perm bitmap. 644 */ 645 acl_get_flagset_np(acl_entry, &acl_flagset); 646 for (i = 0; i < (int)(sizeof(acl_inherit_map) / sizeof(acl_inherit_map[0])); ++i) { 647 if (acl_get_flag_np(acl_flagset, 648 acl_inherit_map[i].platform_inherit)) 649 ae_perm |= acl_inherit_map[i].archive_inherit; 650 651 } 652 #endif 653 654 acl_get_permset(acl_entry, &acl_permset); 655 for (i = 0; i < (int)(sizeof(acl_perm_map) / sizeof(acl_perm_map[0])); ++i) { 656 /* 657 * acl_get_perm() is spelled differently on different 658 * platforms; see above. 659 */ 660 if (ACL_GET_PERM(acl_permset, acl_perm_map[i].platform_perm)) 661 ae_perm |= acl_perm_map[i].archive_perm; 662 } 663 664 archive_entry_acl_add_entry(entry, entry_acl_type, 665 ae_perm, ae_tag, 666 ae_id, ae_name); 667 668 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry); 669 } 670 return (ARCHIVE_OK); 671 } 672 #else 673 static int 674 setup_acls(struct archive_read_disk *a, 675 struct archive_entry *entry, int *fd) 676 { 677 (void)a; /* UNUSED */ 678 (void)entry; /* UNUSED */ 679 (void)fd; /* UNUSED */ 680 return (ARCHIVE_OK); 681 } 682 #endif 683 684 #if (HAVE_FGETXATTR && HAVE_FLISTXATTR && HAVE_LISTXATTR && \ 685 HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR) || \ 686 (HAVE_FGETEA && HAVE_FLISTEA && HAVE_LISTEA) 687 688 /* 689 * Linux and AIX extended attribute support. 690 * 691 * TODO: By using a stack-allocated buffer for the first 692 * call to getxattr(), we might be able to avoid the second 693 * call entirely. We only need the second call if the 694 * stack-allocated buffer is too small. But a modest buffer 695 * of 1024 bytes or so will often be big enough. Same applies 696 * to listxattr(). 697 */ 698 699 700 static int 701 setup_xattr(struct archive_read_disk *a, 702 struct archive_entry *entry, const char *name, int fd) 703 { 704 ssize_t size; 705 void *value = NULL; 706 const char *accpath; 707 708 accpath = archive_entry_sourcepath(entry); 709 if (accpath == NULL) 710 accpath = archive_entry_pathname(entry); 711 712 #if HAVE_FGETXATTR 713 if (fd >= 0) 714 size = fgetxattr(fd, name, NULL, 0); 715 else if (!a->follow_symlinks) 716 size = lgetxattr(accpath, name, NULL, 0); 717 else 718 size = getxattr(accpath, name, NULL, 0); 719 #elif HAVE_FGETEA 720 if (fd >= 0) 721 size = fgetea(fd, name, NULL, 0); 722 else if (!a->follow_symlinks) 723 size = lgetea(accpath, name, NULL, 0); 724 else 725 size = getea(accpath, name, NULL, 0); 726 #endif 727 728 if (size == -1) { 729 archive_set_error(&a->archive, errno, 730 "Couldn't query extended attribute"); 731 return (ARCHIVE_WARN); 732 } 733 734 if (size > 0 && (value = malloc(size)) == NULL) { 735 archive_set_error(&a->archive, errno, "Out of memory"); 736 return (ARCHIVE_FATAL); 737 } 738 739 #if HAVE_FGETXATTR 740 if (fd >= 0) 741 size = fgetxattr(fd, name, value, size); 742 else if (!a->follow_symlinks) 743 size = lgetxattr(accpath, name, value, size); 744 else 745 size = getxattr(accpath, name, value, size); 746 #elif HAVE_FGETEA 747 if (fd >= 0) 748 size = fgetea(fd, name, value, size); 749 else if (!a->follow_symlinks) 750 size = lgetea(accpath, name, value, size); 751 else 752 size = getea(accpath, name, value, size); 753 #endif 754 755 if (size == -1) { 756 archive_set_error(&a->archive, errno, 757 "Couldn't read extended attribute"); 758 return (ARCHIVE_WARN); 759 } 760 761 archive_entry_xattr_add_entry(entry, name, value, size); 762 763 free(value); 764 return (ARCHIVE_OK); 765 } 766 767 static int 768 setup_xattrs(struct archive_read_disk *a, 769 struct archive_entry *entry, int *fd) 770 { 771 char *list, *p; 772 const char *path; 773 ssize_t list_size; 774 775 path = archive_entry_sourcepath(entry); 776 if (path == NULL) 777 path = archive_entry_pathname(entry); 778 779 if (*fd < 0 && a->tree != NULL) { 780 if (a->follow_symlinks || 781 archive_entry_filetype(entry) != AE_IFLNK) 782 *fd = a->open_on_current_dir(a->tree, path, 783 O_RDONLY | O_NONBLOCK); 784 if (*fd < 0) { 785 if (a->tree_enter_working_dir(a->tree) != 0) { 786 archive_set_error(&a->archive, errno, 787 "Couldn't access %s", path); 788 return (ARCHIVE_FAILED); 789 } 790 } 791 } 792 793 #if HAVE_FLISTXATTR 794 if (*fd >= 0) 795 list_size = flistxattr(*fd, NULL, 0); 796 else if (!a->follow_symlinks) 797 list_size = llistxattr(path, NULL, 0); 798 else 799 list_size = listxattr(path, NULL, 0); 800 #elif HAVE_FLISTEA 801 if (*fd >= 0) 802 list_size = flistea(*fd, NULL, 0); 803 else if (!a->follow_symlinks) 804 list_size = llistea(path, NULL, 0); 805 else 806 list_size = listea(path, NULL, 0); 807 #endif 808 809 if (list_size == -1) { 810 if (errno == ENOTSUP || errno == ENOSYS) 811 return (ARCHIVE_OK); 812 archive_set_error(&a->archive, errno, 813 "Couldn't list extended attributes"); 814 return (ARCHIVE_WARN); 815 } 816 817 if (list_size == 0) 818 return (ARCHIVE_OK); 819 820 if ((list = malloc(list_size)) == NULL) { 821 archive_set_error(&a->archive, errno, "Out of memory"); 822 return (ARCHIVE_FATAL); 823 } 824 825 #if HAVE_FLISTXATTR 826 if (*fd >= 0) 827 list_size = flistxattr(*fd, list, list_size); 828 else if (!a->follow_symlinks) 829 list_size = llistxattr(path, list, list_size); 830 else 831 list_size = listxattr(path, list, list_size); 832 #elif HAVE_FLISTEA 833 if (*fd >= 0) 834 list_size = flistea(*fd, list, list_size); 835 else if (!a->follow_symlinks) 836 list_size = llistea(path, list, list_size); 837 else 838 list_size = listea(path, list, list_size); 839 #endif 840 841 if (list_size == -1) { 842 archive_set_error(&a->archive, errno, 843 "Couldn't retrieve extended attributes"); 844 free(list); 845 return (ARCHIVE_WARN); 846 } 847 848 for (p = list; (p - list) < list_size; p += strlen(p) + 1) { 849 if (strncmp(p, "system.", 7) == 0 || 850 strncmp(p, "xfsroot.", 8) == 0) 851 continue; 852 setup_xattr(a, entry, p, *fd); 853 } 854 855 free(list); 856 return (ARCHIVE_OK); 857 } 858 859 #elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE && \ 860 HAVE_DECL_EXTATTR_NAMESPACE_USER 861 862 /* 863 * FreeBSD extattr interface. 864 */ 865 866 /* TODO: Implement this. Follow the Linux model above, but 867 * with FreeBSD-specific system calls, of course. Be careful 868 * to not include the system extattrs that hold ACLs; we handle 869 * those separately. 870 */ 871 static int 872 setup_xattr(struct archive_read_disk *a, struct archive_entry *entry, 873 int namespace, const char *name, const char *fullname, int fd); 874 875 static int 876 setup_xattr(struct archive_read_disk *a, struct archive_entry *entry, 877 int namespace, const char *name, const char *fullname, int fd) 878 { 879 ssize_t size; 880 void *value = NULL; 881 const char *accpath; 882 883 accpath = archive_entry_sourcepath(entry); 884 if (accpath == NULL) 885 accpath = archive_entry_pathname(entry); 886 887 if (fd >= 0) 888 size = extattr_get_fd(fd, namespace, name, NULL, 0); 889 else if (!a->follow_symlinks) 890 size = extattr_get_link(accpath, namespace, name, NULL, 0); 891 else 892 size = extattr_get_file(accpath, namespace, name, NULL, 0); 893 894 if (size == -1) { 895 archive_set_error(&a->archive, errno, 896 "Couldn't query extended attribute"); 897 return (ARCHIVE_WARN); 898 } 899 900 if (size > 0 && (value = malloc(size)) == NULL) { 901 archive_set_error(&a->archive, errno, "Out of memory"); 902 return (ARCHIVE_FATAL); 903 } 904 905 if (fd >= 0) 906 size = extattr_get_fd(fd, namespace, name, value, size); 907 else if (!a->follow_symlinks) 908 size = extattr_get_link(accpath, namespace, name, value, size); 909 else 910 size = extattr_get_file(accpath, namespace, name, value, size); 911 912 if (size == -1) { 913 free(value); 914 archive_set_error(&a->archive, errno, 915 "Couldn't read extended attribute"); 916 return (ARCHIVE_WARN); 917 } 918 919 archive_entry_xattr_add_entry(entry, fullname, value, size); 920 921 free(value); 922 return (ARCHIVE_OK); 923 } 924 925 static int 926 setup_xattrs(struct archive_read_disk *a, 927 struct archive_entry *entry, int *fd) 928 { 929 char buff[512]; 930 char *list, *p; 931 ssize_t list_size; 932 const char *path; 933 int namespace = EXTATTR_NAMESPACE_USER; 934 935 path = archive_entry_sourcepath(entry); 936 if (path == NULL) 937 path = archive_entry_pathname(entry); 938 939 if (*fd < 0 && a->tree != NULL) { 940 if (a->follow_symlinks || 941 archive_entry_filetype(entry) != AE_IFLNK) 942 *fd = a->open_on_current_dir(a->tree, path, 943 O_RDONLY | O_NONBLOCK); 944 if (*fd < 0) { 945 if (a->tree_enter_working_dir(a->tree) != 0) { 946 archive_set_error(&a->archive, errno, 947 "Couldn't access %s", path); 948 return (ARCHIVE_FAILED); 949 } 950 } 951 } 952 953 if (*fd >= 0) 954 list_size = extattr_list_fd(*fd, namespace, NULL, 0); 955 else if (!a->follow_symlinks) 956 list_size = extattr_list_link(path, namespace, NULL, 0); 957 else 958 list_size = extattr_list_file(path, namespace, NULL, 0); 959 960 if (list_size == -1 && errno == EOPNOTSUPP) 961 return (ARCHIVE_OK); 962 if (list_size == -1) { 963 archive_set_error(&a->archive, errno, 964 "Couldn't list extended attributes"); 965 return (ARCHIVE_WARN); 966 } 967 968 if (list_size == 0) 969 return (ARCHIVE_OK); 970 971 if ((list = malloc(list_size)) == NULL) { 972 archive_set_error(&a->archive, errno, "Out of memory"); 973 return (ARCHIVE_FATAL); 974 } 975 976 if (*fd >= 0) 977 list_size = extattr_list_fd(*fd, namespace, list, list_size); 978 else if (!a->follow_symlinks) 979 list_size = extattr_list_link(path, namespace, list, list_size); 980 else 981 list_size = extattr_list_file(path, namespace, list, list_size); 982 983 if (list_size == -1) { 984 archive_set_error(&a->archive, errno, 985 "Couldn't retrieve extended attributes"); 986 free(list); 987 return (ARCHIVE_WARN); 988 } 989 990 p = list; 991 while ((p - list) < list_size) { 992 size_t len = 255 & (int)*p; 993 char *name; 994 995 strcpy(buff, "user."); 996 name = buff + strlen(buff); 997 memcpy(name, p + 1, len); 998 name[len] = '\0'; 999 setup_xattr(a, entry, namespace, name, buff, *fd); 1000 p += 1 + len; 1001 } 1002 1003 free(list); 1004 return (ARCHIVE_OK); 1005 } 1006 1007 #else 1008 1009 /* 1010 * Generic (stub) extended attribute support. 1011 */ 1012 static int 1013 setup_xattrs(struct archive_read_disk *a, 1014 struct archive_entry *entry, int *fd) 1015 { 1016 (void)a; /* UNUSED */ 1017 (void)entry; /* UNUSED */ 1018 (void)fd; /* UNUSED */ 1019 return (ARCHIVE_OK); 1020 } 1021 1022 #endif 1023 1024 #if defined(HAVE_LINUX_FIEMAP_H) 1025 1026 /* 1027 * Linux sparse interface. 1028 * 1029 * The FIEMAP ioctl returns an "extent" for each physical allocation 1030 * on disk. We need to process those to generate a more compact list 1031 * of logical file blocks. We also need to be very careful to use 1032 * FIEMAP_FLAG_SYNC here, since there are reports that Linux sometimes 1033 * does not report allocations for newly-written data that hasn't 1034 * been synced to disk. 1035 * 1036 * It's important to return a minimal sparse file list because we want 1037 * to not trigger sparse file extensions if we don't have to, since 1038 * not all readers support them. 1039 */ 1040 1041 static int 1042 setup_sparse(struct archive_read_disk *a, 1043 struct archive_entry *entry, int *fd) 1044 { 1045 char buff[4096]; 1046 struct fiemap *fm; 1047 struct fiemap_extent *fe; 1048 int64_t size; 1049 int count, do_fiemap, iters; 1050 int exit_sts = ARCHIVE_OK; 1051 1052 if (archive_entry_filetype(entry) != AE_IFREG 1053 || archive_entry_size(entry) <= 0 1054 || archive_entry_hardlink(entry) != NULL) 1055 return (ARCHIVE_OK); 1056 1057 if (*fd < 0) { 1058 const char *path; 1059 1060 path = archive_entry_sourcepath(entry); 1061 if (path == NULL) 1062 path = archive_entry_pathname(entry); 1063 if (a->tree != NULL) 1064 *fd = a->open_on_current_dir(a->tree, path, 1065 O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1066 else 1067 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1068 if (*fd < 0) { 1069 archive_set_error(&a->archive, errno, 1070 "Can't open `%s'", path); 1071 return (ARCHIVE_FAILED); 1072 } 1073 __archive_ensure_cloexec_flag(*fd); 1074 } 1075 1076 /* Initialize buffer to avoid the error valgrind complains about. */ 1077 memset(buff, 0, sizeof(buff)); 1078 count = (sizeof(buff) - sizeof(*fm))/sizeof(*fe); 1079 fm = (struct fiemap *)buff; 1080 fm->fm_start = 0; 1081 fm->fm_length = ~0ULL;; 1082 fm->fm_flags = FIEMAP_FLAG_SYNC; 1083 fm->fm_extent_count = count; 1084 do_fiemap = 1; 1085 size = archive_entry_size(entry); 1086 for (iters = 0; ; ++iters) { 1087 int i, r; 1088 1089 r = ioctl(*fd, FS_IOC_FIEMAP, fm); 1090 if (r < 0) { 1091 /* When something error happens, it is better we 1092 * should return ARCHIVE_OK because an earlier 1093 * version(<2.6.28) cannot perfom FS_IOC_FIEMAP. */ 1094 goto exit_setup_sparse; 1095 } 1096 if (fm->fm_mapped_extents == 0) { 1097 if (iters == 0) { 1098 /* Fully sparse file; insert a zero-length "data" entry */ 1099 archive_entry_sparse_add_entry(entry, 0, 0); 1100 } 1101 break; 1102 } 1103 fe = fm->fm_extents; 1104 for (i = 0; i < (int)fm->fm_mapped_extents; i++, fe++) { 1105 if (!(fe->fe_flags & FIEMAP_EXTENT_UNWRITTEN)) { 1106 /* The fe_length of the last block does not 1107 * adjust itself to its size files. */ 1108 int64_t length = fe->fe_length; 1109 if (fe->fe_logical + length > (uint64_t)size) 1110 length -= fe->fe_logical + length - size; 1111 if (fe->fe_logical == 0 && length == size) { 1112 /* This is not sparse. */ 1113 do_fiemap = 0; 1114 break; 1115 } 1116 if (length > 0) 1117 archive_entry_sparse_add_entry(entry, 1118 fe->fe_logical, length); 1119 } 1120 if (fe->fe_flags & FIEMAP_EXTENT_LAST) 1121 do_fiemap = 0; 1122 } 1123 if (do_fiemap) { 1124 fe = fm->fm_extents + fm->fm_mapped_extents -1; 1125 fm->fm_start = fe->fe_logical + fe->fe_length; 1126 } else 1127 break; 1128 } 1129 exit_setup_sparse: 1130 return (exit_sts); 1131 } 1132 1133 #elif defined(SEEK_HOLE) && defined(SEEK_DATA) && defined(_PC_MIN_HOLE_SIZE) 1134 1135 /* 1136 * FreeBSD and Solaris sparse interface. 1137 */ 1138 1139 static int 1140 setup_sparse(struct archive_read_disk *a, 1141 struct archive_entry *entry, int *fd) 1142 { 1143 int64_t size; 1144 off_t initial_off; /* FreeBSD/Solaris only, so off_t okay here */ 1145 off_t off_s, off_e; /* FreeBSD/Solaris only, so off_t okay here */ 1146 int exit_sts = ARCHIVE_OK; 1147 int check_fully_sparse = 0; 1148 1149 if (archive_entry_filetype(entry) != AE_IFREG 1150 || archive_entry_size(entry) <= 0 1151 || archive_entry_hardlink(entry) != NULL) 1152 return (ARCHIVE_OK); 1153 1154 /* Does filesystem support the reporting of hole ? */ 1155 if (*fd < 0 && a->tree != NULL) { 1156 const char *path; 1157 1158 path = archive_entry_sourcepath(entry); 1159 if (path == NULL) 1160 path = archive_entry_pathname(entry); 1161 *fd = a->open_on_current_dir(a->tree, path, 1162 O_RDONLY | O_NONBLOCK); 1163 if (*fd < 0) { 1164 archive_set_error(&a->archive, errno, 1165 "Can't open `%s'", path); 1166 return (ARCHIVE_FAILED); 1167 } 1168 } 1169 1170 if (*fd >= 0) { 1171 if (fpathconf(*fd, _PC_MIN_HOLE_SIZE) <= 0) 1172 return (ARCHIVE_OK); 1173 initial_off = lseek(*fd, 0, SEEK_CUR); 1174 if (initial_off != 0) 1175 lseek(*fd, 0, SEEK_SET); 1176 } else { 1177 const char *path; 1178 1179 path = archive_entry_sourcepath(entry); 1180 if (path == NULL) 1181 path = archive_entry_pathname(entry); 1182 1183 if (pathconf(path, _PC_MIN_HOLE_SIZE) <= 0) 1184 return (ARCHIVE_OK); 1185 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1186 if (*fd < 0) { 1187 archive_set_error(&a->archive, errno, 1188 "Can't open `%s'", path); 1189 return (ARCHIVE_FAILED); 1190 } 1191 __archive_ensure_cloexec_flag(*fd); 1192 initial_off = 0; 1193 } 1194 1195 off_s = 0; 1196 size = archive_entry_size(entry); 1197 while (off_s < size) { 1198 off_s = lseek(*fd, off_s, SEEK_DATA); 1199 if (off_s == (off_t)-1) { 1200 if (errno == ENXIO) { 1201 /* no more hole */ 1202 if (archive_entry_sparse_count(entry) == 0) { 1203 /* Potentially a fully-sparse file. */ 1204 check_fully_sparse = 1; 1205 } 1206 break; 1207 } 1208 archive_set_error(&a->archive, errno, 1209 "lseek(SEEK_HOLE) failed"); 1210 exit_sts = ARCHIVE_FAILED; 1211 goto exit_setup_sparse; 1212 } 1213 off_e = lseek(*fd, off_s, SEEK_HOLE); 1214 if (off_e == (off_t)-1) { 1215 if (errno == ENXIO) { 1216 off_e = lseek(*fd, 0, SEEK_END); 1217 if (off_e != (off_t)-1) 1218 break;/* no more data */ 1219 } 1220 archive_set_error(&a->archive, errno, 1221 "lseek(SEEK_DATA) failed"); 1222 exit_sts = ARCHIVE_FAILED; 1223 goto exit_setup_sparse; 1224 } 1225 if (off_s == 0 && off_e == size) 1226 break;/* This is not spase. */ 1227 archive_entry_sparse_add_entry(entry, off_s, 1228 off_e - off_s); 1229 off_s = off_e; 1230 } 1231 1232 if (check_fully_sparse) { 1233 if (lseek(*fd, 0, SEEK_HOLE) == 0 && 1234 lseek(*fd, 0, SEEK_END) == size) { 1235 /* Fully sparse file; insert a zero-length "data" entry */ 1236 archive_entry_sparse_add_entry(entry, 0, 0); 1237 } 1238 } 1239 exit_setup_sparse: 1240 lseek(*fd, initial_off, SEEK_SET); 1241 return (exit_sts); 1242 } 1243 1244 #else 1245 1246 /* 1247 * Generic (stub) sparse support. 1248 */ 1249 static int 1250 setup_sparse(struct archive_read_disk *a, 1251 struct archive_entry *entry, int *fd) 1252 { 1253 (void)a; /* UNUSED */ 1254 (void)entry; /* UNUSED */ 1255 (void)fd; /* UNUSED */ 1256 return (ARCHIVE_OK); 1257 } 1258 1259 #endif 1260 1261 #endif /* !defined(_WIN32) || defined(__CYGWIN__) */ 1262 1263