archive_read_disk_entry_from_file.c revision 307798
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: stable/10/contrib/libarchive/libarchive/archive_read_disk_entry_from_file.c 307798 2016-10-22 21:41:28Z mm $"); 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 120static int setup_acls(struct archive_read_disk *, 121 struct archive_entry *, int *fd); 122static int setup_mac_metadata(struct archive_read_disk *, 123 struct archive_entry *, int *fd); 124static int setup_xattrs(struct archive_read_disk *, 125 struct archive_entry *, int *fd); 126static int setup_sparse(struct archive_read_disk *, 127 struct archive_entry *, int *fd); 128 129int 130archive_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 */ 288static int 289setup_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 377cleanup: 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 */ 392static int 393setup_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 405static int translate_acl(struct archive_read_disk *a, 406 struct archive_entry *entry, acl_t acl, int archive_entry_acl_type); 407 408static int 409setup_acls(struct archive_read_disk *a, 410 struct archive_entry *entry, int *fd) 411{ 412 const char *accpath; 413 acl_t acl; 414 int r; 415 416 accpath = archive_entry_sourcepath(entry); 417 if (accpath == NULL) 418 accpath = archive_entry_pathname(entry); 419 420 if (*fd < 0 && a->tree != NULL) { 421 if (a->follow_symlinks || 422 archive_entry_filetype(entry) != AE_IFLNK) 423 *fd = a->open_on_current_dir(a->tree, 424 accpath, O_RDONLY | O_NONBLOCK); 425 if (*fd < 0) { 426 if (a->tree_enter_working_dir(a->tree) != 0) { 427 archive_set_error(&a->archive, errno, 428 "Couldn't access %s", accpath); 429 return (ARCHIVE_FAILED); 430 } 431 } 432 } 433 434 archive_entry_acl_clear(entry); 435 436 acl = NULL; 437 438#ifdef ACL_TYPE_NFS4 439 /* Try NFS4 ACL first. */ 440 if (*fd >= 0) 441#if HAVE_ACL_GET_FD_NP 442 acl = acl_get_fd_np(*fd, ACL_TYPE_NFS4); 443#else 444 acl = acl_get_fd(*fd); 445#endif 446#if HAVE_ACL_GET_LINK_NP 447 else if (!a->follow_symlinks) 448 acl = acl_get_link_np(accpath, ACL_TYPE_NFS4); 449#else 450 else if ((!a->follow_symlinks) 451 && (archive_entry_filetype(entry) == AE_IFLNK)) 452 /* We can't get the ACL of a symlink, so we assume it can't 453 have one. */ 454 acl = NULL; 455#endif 456 else 457 acl = acl_get_file(accpath, ACL_TYPE_NFS4); 458 459#if HAVE_ACL_IS_TRIVIAL_NP 460 if (acl != NULL && acl_is_trivial_np(acl, &r) == 0) { 461 /* Ignore "trivial" ACLs that just mirror the file mode. */ 462 if (r) { 463 acl_free(acl); 464 acl = NULL; 465 /* 466 * Simultaneous NFSv4 and POSIX.1e ACLs for the same 467 * entry are not allowed, so we should return here 468 */ 469 return (ARCHIVE_OK); 470 } 471 } 472#endif 473 if (acl != NULL) { 474 r = translate_acl(a, entry, acl, ARCHIVE_ENTRY_ACL_TYPE_NFS4); 475 acl_free(acl); 476 if (r != ARCHIVE_OK) { 477 archive_set_error(&a->archive, errno, 478 "Couldn't translate NFSv4 ACLs: %s", accpath); 479 } 480 return (r); 481 } 482#endif /* ACL_TYPE_NFS4 */ 483 484 /* Retrieve access ACL from file. */ 485 if (*fd >= 0) 486 acl = acl_get_fd(*fd); 487#if HAVE_ACL_GET_LINK_NP 488 else if (!a->follow_symlinks) 489 acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS); 490#else 491 else if ((!a->follow_symlinks) 492 && (archive_entry_filetype(entry) == AE_IFLNK)) 493 /* We can't get the ACL of a symlink, so we assume it can't 494 have one. */ 495 acl = NULL; 496#endif 497 else 498 acl = acl_get_file(accpath, ACL_TYPE_ACCESS); 499 500#if HAVE_ACL_IS_TRIVIAL_NP 501 /* Ignore "trivial" ACLs that just mirror the file mode. */ 502 if (acl != NULL && acl_is_trivial_np(acl, &r) == 0) { 503 if (r) { 504 acl_free(acl); 505 acl = NULL; 506 } 507 } 508#endif 509 510 if (acl != NULL) { 511 r = translate_acl(a, entry, acl, 512 ARCHIVE_ENTRY_ACL_TYPE_ACCESS); 513 acl_free(acl); 514 acl = NULL; 515 if (r != ARCHIVE_OK) { 516 archive_set_error(&a->archive, errno, 517 "Couldn't translate access ACLs: %s", accpath); 518 return (r); 519 } 520 } 521 522 /* Only directories can have default ACLs. */ 523 if (S_ISDIR(archive_entry_mode(entry))) { 524 acl = acl_get_file(accpath, ACL_TYPE_DEFAULT); 525 if (acl != NULL) { 526 r = translate_acl(a, entry, acl, 527 ARCHIVE_ENTRY_ACL_TYPE_DEFAULT); 528 acl_free(acl); 529 if (r != ARCHIVE_OK) { 530 archive_set_error(&a->archive, errno, 531 "Couldn't translate default ACLs: %s", 532 accpath); 533 return (r); 534 } 535 } 536 } 537 return (ARCHIVE_OK); 538} 539 540/* 541 * Translate system ACL into libarchive internal structure. 542 */ 543 544static struct { 545 int archive_perm; 546 int platform_perm; 547} acl_perm_map[] = { 548 {ARCHIVE_ENTRY_ACL_EXECUTE, ACL_EXECUTE}, 549 {ARCHIVE_ENTRY_ACL_WRITE, ACL_WRITE}, 550 {ARCHIVE_ENTRY_ACL_READ, ACL_READ}, 551#ifdef ACL_TYPE_NFS4 552 {ARCHIVE_ENTRY_ACL_READ_DATA, ACL_READ_DATA}, 553 {ARCHIVE_ENTRY_ACL_LIST_DIRECTORY, ACL_LIST_DIRECTORY}, 554 {ARCHIVE_ENTRY_ACL_WRITE_DATA, ACL_WRITE_DATA}, 555 {ARCHIVE_ENTRY_ACL_ADD_FILE, ACL_ADD_FILE}, 556 {ARCHIVE_ENTRY_ACL_APPEND_DATA, ACL_APPEND_DATA}, 557 {ARCHIVE_ENTRY_ACL_ADD_SUBDIRECTORY, ACL_ADD_SUBDIRECTORY}, 558 {ARCHIVE_ENTRY_ACL_READ_NAMED_ATTRS, ACL_READ_NAMED_ATTRS}, 559 {ARCHIVE_ENTRY_ACL_WRITE_NAMED_ATTRS, ACL_WRITE_NAMED_ATTRS}, 560 {ARCHIVE_ENTRY_ACL_DELETE_CHILD, ACL_DELETE_CHILD}, 561 {ARCHIVE_ENTRY_ACL_READ_ATTRIBUTES, ACL_READ_ATTRIBUTES}, 562 {ARCHIVE_ENTRY_ACL_WRITE_ATTRIBUTES, ACL_WRITE_ATTRIBUTES}, 563 {ARCHIVE_ENTRY_ACL_DELETE, ACL_DELETE}, 564 {ARCHIVE_ENTRY_ACL_READ_ACL, ACL_READ_ACL}, 565 {ARCHIVE_ENTRY_ACL_WRITE_ACL, ACL_WRITE_ACL}, 566 {ARCHIVE_ENTRY_ACL_WRITE_OWNER, ACL_WRITE_OWNER}, 567 {ARCHIVE_ENTRY_ACL_SYNCHRONIZE, ACL_SYNCHRONIZE} 568#endif 569}; 570 571#ifdef ACL_TYPE_NFS4 572static struct { 573 int archive_inherit; 574 int platform_inherit; 575} acl_inherit_map[] = { 576 {ARCHIVE_ENTRY_ACL_ENTRY_FILE_INHERIT, ACL_ENTRY_FILE_INHERIT}, 577 {ARCHIVE_ENTRY_ACL_ENTRY_DIRECTORY_INHERIT, ACL_ENTRY_DIRECTORY_INHERIT}, 578 {ARCHIVE_ENTRY_ACL_ENTRY_NO_PROPAGATE_INHERIT, ACL_ENTRY_NO_PROPAGATE_INHERIT}, 579 {ARCHIVE_ENTRY_ACL_ENTRY_INHERIT_ONLY, ACL_ENTRY_INHERIT_ONLY} 580}; 581#endif 582static int 583translate_acl(struct archive_read_disk *a, 584 struct archive_entry *entry, acl_t acl, int default_entry_acl_type) 585{ 586 acl_tag_t acl_tag; 587#ifdef ACL_TYPE_NFS4 588 acl_entry_type_t acl_type; 589 acl_flagset_t acl_flagset; 590 int brand; 591#endif 592 acl_entry_t acl_entry; 593 acl_permset_t acl_permset; 594 int i, entry_acl_type; 595 int r, s, ae_id, ae_tag, ae_perm; 596 const char *ae_name; 597 598#ifdef ACL_TYPE_NFS4 599 // FreeBSD "brands" ACLs as POSIX.1e or NFSv4 600 // Make sure the "brand" on this ACL is consistent 601 // with the default_entry_acl_type bits provided. 602 if (acl_get_brand_np(acl, &brand) != 0) { 603 archive_set_error(&a->archive, errno, 604 "Failed to read ACL brand"); 605 return (ARCHIVE_WARN); 606 } 607 switch (brand) { 608 case ACL_BRAND_POSIX: 609 switch (default_entry_acl_type) { 610 case ARCHIVE_ENTRY_ACL_TYPE_ACCESS: 611 case ARCHIVE_ENTRY_ACL_TYPE_DEFAULT: 612 break; 613 default: 614 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 615 "Invalid ACL entry type for POSIX.1e ACL"); 616 return (ARCHIVE_WARN); 617 } 618 break; 619 case ACL_BRAND_NFS4: 620 if (default_entry_acl_type & ~ARCHIVE_ENTRY_ACL_TYPE_NFS4) { 621 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 622 "Invalid ACL entry type for NFSv4 ACL"); 623 return (ARCHIVE_WARN); 624 } 625 break; 626 default: 627 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 628 "Unknown ACL brand"); 629 return (ARCHIVE_WARN); 630 } 631#endif 632 633 634 s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry); 635 if (s == -1) { 636 archive_set_error(&a->archive, errno, 637 "Failed to get first ACL entry"); 638 return (ARCHIVE_WARN); 639 } 640 while (s == 1) { 641 ae_id = -1; 642 ae_name = NULL; 643 ae_perm = 0; 644 645 if (acl_get_tag_type(acl_entry, &acl_tag) != 0) { 646 archive_set_error(&a->archive, errno, 647 "Failed to get ACL tag type"); 648 return (ARCHIVE_WARN); 649 } 650 switch (acl_tag) { 651 case ACL_USER: 652 ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry); 653 ae_name = archive_read_disk_uname(&a->archive, ae_id); 654 ae_tag = ARCHIVE_ENTRY_ACL_USER; 655 break; 656 case ACL_GROUP: 657 ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry); 658 ae_name = archive_read_disk_gname(&a->archive, ae_id); 659 ae_tag = ARCHIVE_ENTRY_ACL_GROUP; 660 break; 661 case ACL_MASK: 662 ae_tag = ARCHIVE_ENTRY_ACL_MASK; 663 break; 664 case ACL_USER_OBJ: 665 ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ; 666 break; 667 case ACL_GROUP_OBJ: 668 ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ; 669 break; 670 case ACL_OTHER: 671 ae_tag = ARCHIVE_ENTRY_ACL_OTHER; 672 break; 673#ifdef ACL_TYPE_NFS4 674 case ACL_EVERYONE: 675 ae_tag = ARCHIVE_ENTRY_ACL_EVERYONE; 676 break; 677#endif 678 default: 679 /* Skip types that libarchive can't support. */ 680 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry); 681 continue; 682 } 683 684 // XXX acl_type maps to allow/deny/audit/YYYY bits 685 entry_acl_type = default_entry_acl_type; 686#ifdef ACL_TYPE_NFS4 687 if (default_entry_acl_type & ARCHIVE_ENTRY_ACL_TYPE_NFS4) { 688 /* 689 * acl_get_entry_type_np() falis with non-NFSv4 ACLs 690 */ 691 if (acl_get_entry_type_np(acl_entry, &acl_type) != 0) { 692 archive_set_error(&a->archive, errno, "Failed " 693 "to get ACL type from a NFSv4 ACL entry"); 694 return (ARCHIVE_WARN); 695 } 696 switch (acl_type) { 697 case ACL_ENTRY_TYPE_ALLOW: 698 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALLOW; 699 break; 700 case ACL_ENTRY_TYPE_DENY: 701 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_DENY; 702 break; 703 case ACL_ENTRY_TYPE_AUDIT: 704 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_AUDIT; 705 break; 706 case ACL_ENTRY_TYPE_ALARM: 707 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALARM; 708 break; 709 default: 710 archive_set_error(&a->archive, errno, 711 "Invalid NFSv4 ACL entry type"); 712 return (ARCHIVE_WARN); 713 } 714 715 /* 716 * Libarchive stores "flag" (NFSv4 inheritance bits) 717 * in the ae_perm bitmap. 718 * 719 * acl_get_flagset_np() fails with non-NFSv4 ACLs 720 */ 721 if (acl_get_flagset_np(acl_entry, &acl_flagset) != 0) { 722 archive_set_error(&a->archive, errno, 723 "Failed to get flagset from a NFSv4 ACL entry"); 724 return (ARCHIVE_WARN); 725 } 726 for (i = 0; i < (int)(sizeof(acl_inherit_map) / sizeof(acl_inherit_map[0])); ++i) { 727 r = acl_get_flag_np(acl_flagset, 728 acl_inherit_map[i].platform_inherit); 729 if (r == -1) { 730 archive_set_error(&a->archive, errno, 731 "Failed to check flag in a NFSv4 " 732 "ACL flagset"); 733 return (ARCHIVE_WARN); 734 } else if (r) 735 ae_perm |= acl_inherit_map[i].archive_inherit; 736 } 737 } 738#endif 739 740 if (acl_get_permset(acl_entry, &acl_permset) != 0) { 741 archive_set_error(&a->archive, errno, 742 "Failed to get ACL permission set"); 743 return (ARCHIVE_WARN); 744 } 745 for (i = 0; i < (int)(sizeof(acl_perm_map) / sizeof(acl_perm_map[0])); ++i) { 746 /* 747 * acl_get_perm() is spelled differently on different 748 * platforms; see above. 749 */ 750 r = ACL_GET_PERM(acl_permset, acl_perm_map[i].platform_perm); 751 if (r == -1) { 752 archive_set_error(&a->archive, errno, 753 "Failed to check permission in an ACL permission set"); 754 return (ARCHIVE_WARN); 755 } else if (r) 756 ae_perm |= acl_perm_map[i].archive_perm; 757 } 758 759 archive_entry_acl_add_entry(entry, entry_acl_type, 760 ae_perm, ae_tag, 761 ae_id, ae_name); 762 763 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry); 764 if (s == -1) { 765 archive_set_error(&a->archive, errno, 766 "Failed to get next ACL entry"); 767 return (ARCHIVE_WARN); 768 } 769 } 770 return (ARCHIVE_OK); 771} 772#else 773static int 774setup_acls(struct archive_read_disk *a, 775 struct archive_entry *entry, int *fd) 776{ 777 (void)a; /* UNUSED */ 778 (void)entry; /* UNUSED */ 779 (void)fd; /* UNUSED */ 780 return (ARCHIVE_OK); 781} 782#endif 783 784#if (HAVE_FGETXATTR && HAVE_FLISTXATTR && HAVE_LISTXATTR && \ 785 HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR) || \ 786 (HAVE_FGETEA && HAVE_FLISTEA && HAVE_LISTEA) 787 788/* 789 * Linux and AIX extended attribute support. 790 * 791 * TODO: By using a stack-allocated buffer for the first 792 * call to getxattr(), we might be able to avoid the second 793 * call entirely. We only need the second call if the 794 * stack-allocated buffer is too small. But a modest buffer 795 * of 1024 bytes or so will often be big enough. Same applies 796 * to listxattr(). 797 */ 798 799 800static int 801setup_xattr(struct archive_read_disk *a, 802 struct archive_entry *entry, const char *name, int fd) 803{ 804 ssize_t size; 805 void *value = NULL; 806 const char *accpath; 807 808 accpath = archive_entry_sourcepath(entry); 809 if (accpath == NULL) 810 accpath = archive_entry_pathname(entry); 811 812#if HAVE_FGETXATTR 813 if (fd >= 0) 814 size = fgetxattr(fd, name, NULL, 0); 815 else if (!a->follow_symlinks) 816 size = lgetxattr(accpath, name, NULL, 0); 817 else 818 size = getxattr(accpath, name, NULL, 0); 819#elif HAVE_FGETEA 820 if (fd >= 0) 821 size = fgetea(fd, name, NULL, 0); 822 else if (!a->follow_symlinks) 823 size = lgetea(accpath, name, NULL, 0); 824 else 825 size = getea(accpath, name, NULL, 0); 826#endif 827 828 if (size == -1) { 829 archive_set_error(&a->archive, errno, 830 "Couldn't query extended attribute"); 831 return (ARCHIVE_WARN); 832 } 833 834 if (size > 0 && (value = malloc(size)) == NULL) { 835 archive_set_error(&a->archive, errno, "Out of memory"); 836 return (ARCHIVE_FATAL); 837 } 838 839#if HAVE_FGETXATTR 840 if (fd >= 0) 841 size = fgetxattr(fd, name, value, size); 842 else if (!a->follow_symlinks) 843 size = lgetxattr(accpath, name, value, size); 844 else 845 size = getxattr(accpath, name, value, size); 846#elif HAVE_FGETEA 847 if (fd >= 0) 848 size = fgetea(fd, name, value, size); 849 else if (!a->follow_symlinks) 850 size = lgetea(accpath, name, value, size); 851 else 852 size = getea(accpath, name, value, size); 853#endif 854 855 if (size == -1) { 856 archive_set_error(&a->archive, errno, 857 "Couldn't read extended attribute"); 858 return (ARCHIVE_WARN); 859 } 860 861 archive_entry_xattr_add_entry(entry, name, value, size); 862 863 free(value); 864 return (ARCHIVE_OK); 865} 866 867static int 868setup_xattrs(struct archive_read_disk *a, 869 struct archive_entry *entry, int *fd) 870{ 871 char *list, *p; 872 const char *path; 873 ssize_t list_size; 874 875 path = archive_entry_sourcepath(entry); 876 if (path == NULL) 877 path = archive_entry_pathname(entry); 878 879 if (*fd < 0 && a->tree != NULL) { 880 if (a->follow_symlinks || 881 archive_entry_filetype(entry) != AE_IFLNK) 882 *fd = a->open_on_current_dir(a->tree, path, 883 O_RDONLY | O_NONBLOCK); 884 if (*fd < 0) { 885 if (a->tree_enter_working_dir(a->tree) != 0) { 886 archive_set_error(&a->archive, errno, 887 "Couldn't access %s", path); 888 return (ARCHIVE_FAILED); 889 } 890 } 891 } 892 893#if HAVE_FLISTXATTR 894 if (*fd >= 0) 895 list_size = flistxattr(*fd, NULL, 0); 896 else if (!a->follow_symlinks) 897 list_size = llistxattr(path, NULL, 0); 898 else 899 list_size = listxattr(path, NULL, 0); 900#elif HAVE_FLISTEA 901 if (*fd >= 0) 902 list_size = flistea(*fd, NULL, 0); 903 else if (!a->follow_symlinks) 904 list_size = llistea(path, NULL, 0); 905 else 906 list_size = listea(path, NULL, 0); 907#endif 908 909 if (list_size == -1) { 910 if (errno == ENOTSUP || errno == ENOSYS) 911 return (ARCHIVE_OK); 912 archive_set_error(&a->archive, errno, 913 "Couldn't list extended attributes"); 914 return (ARCHIVE_WARN); 915 } 916 917 if (list_size == 0) 918 return (ARCHIVE_OK); 919 920 if ((list = malloc(list_size)) == NULL) { 921 archive_set_error(&a->archive, errno, "Out of memory"); 922 return (ARCHIVE_FATAL); 923 } 924 925#if HAVE_FLISTXATTR 926 if (*fd >= 0) 927 list_size = flistxattr(*fd, list, list_size); 928 else if (!a->follow_symlinks) 929 list_size = llistxattr(path, list, list_size); 930 else 931 list_size = listxattr(path, list, list_size); 932#elif HAVE_FLISTEA 933 if (*fd >= 0) 934 list_size = flistea(*fd, list, list_size); 935 else if (!a->follow_symlinks) 936 list_size = llistea(path, list, list_size); 937 else 938 list_size = listea(path, list, list_size); 939#endif 940 941 if (list_size == -1) { 942 archive_set_error(&a->archive, errno, 943 "Couldn't retrieve extended attributes"); 944 free(list); 945 return (ARCHIVE_WARN); 946 } 947 948 for (p = list; (p - list) < list_size; p += strlen(p) + 1) { 949 if (strncmp(p, "system.", 7) == 0 || 950 strncmp(p, "xfsroot.", 8) == 0) 951 continue; 952 setup_xattr(a, entry, p, *fd); 953 } 954 955 free(list); 956 return (ARCHIVE_OK); 957} 958 959#elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE && \ 960 HAVE_DECL_EXTATTR_NAMESPACE_USER 961 962/* 963 * FreeBSD extattr interface. 964 */ 965 966/* TODO: Implement this. Follow the Linux model above, but 967 * with FreeBSD-specific system calls, of course. Be careful 968 * to not include the system extattrs that hold ACLs; we handle 969 * those separately. 970 */ 971static int 972setup_xattr(struct archive_read_disk *a, struct archive_entry *entry, 973 int namespace, const char *name, const char *fullname, int fd); 974 975static int 976setup_xattr(struct archive_read_disk *a, struct archive_entry *entry, 977 int namespace, const char *name, const char *fullname, int fd) 978{ 979 ssize_t size; 980 void *value = NULL; 981 const char *accpath; 982 983 accpath = archive_entry_sourcepath(entry); 984 if (accpath == NULL) 985 accpath = archive_entry_pathname(entry); 986 987 if (fd >= 0) 988 size = extattr_get_fd(fd, namespace, name, NULL, 0); 989 else if (!a->follow_symlinks) 990 size = extattr_get_link(accpath, namespace, name, NULL, 0); 991 else 992 size = extattr_get_file(accpath, namespace, name, NULL, 0); 993 994 if (size == -1) { 995 archive_set_error(&a->archive, errno, 996 "Couldn't query extended attribute"); 997 return (ARCHIVE_WARN); 998 } 999 1000 if (size > 0 && (value = malloc(size)) == NULL) { 1001 archive_set_error(&a->archive, errno, "Out of memory"); 1002 return (ARCHIVE_FATAL); 1003 } 1004 1005 if (fd >= 0) 1006 size = extattr_get_fd(fd, namespace, name, value, size); 1007 else if (!a->follow_symlinks) 1008 size = extattr_get_link(accpath, namespace, name, value, size); 1009 else 1010 size = extattr_get_file(accpath, namespace, name, value, size); 1011 1012 if (size == -1) { 1013 free(value); 1014 archive_set_error(&a->archive, errno, 1015 "Couldn't read extended attribute"); 1016 return (ARCHIVE_WARN); 1017 } 1018 1019 archive_entry_xattr_add_entry(entry, fullname, value, size); 1020 1021 free(value); 1022 return (ARCHIVE_OK); 1023} 1024 1025static int 1026setup_xattrs(struct archive_read_disk *a, 1027 struct archive_entry *entry, int *fd) 1028{ 1029 char buff[512]; 1030 char *list, *p; 1031 ssize_t list_size; 1032 const char *path; 1033 int namespace = EXTATTR_NAMESPACE_USER; 1034 1035 path = archive_entry_sourcepath(entry); 1036 if (path == NULL) 1037 path = archive_entry_pathname(entry); 1038 1039 if (*fd < 0 && a->tree != NULL) { 1040 if (a->follow_symlinks || 1041 archive_entry_filetype(entry) != AE_IFLNK) 1042 *fd = a->open_on_current_dir(a->tree, path, 1043 O_RDONLY | O_NONBLOCK); 1044 if (*fd < 0) { 1045 if (a->tree_enter_working_dir(a->tree) != 0) { 1046 archive_set_error(&a->archive, errno, 1047 "Couldn't access %s", path); 1048 return (ARCHIVE_FAILED); 1049 } 1050 } 1051 } 1052 1053 if (*fd >= 0) 1054 list_size = extattr_list_fd(*fd, namespace, NULL, 0); 1055 else if (!a->follow_symlinks) 1056 list_size = extattr_list_link(path, namespace, NULL, 0); 1057 else 1058 list_size = extattr_list_file(path, namespace, NULL, 0); 1059 1060 if (list_size == -1 && errno == EOPNOTSUPP) 1061 return (ARCHIVE_OK); 1062 if (list_size == -1) { 1063 archive_set_error(&a->archive, errno, 1064 "Couldn't list extended attributes"); 1065 return (ARCHIVE_WARN); 1066 } 1067 1068 if (list_size == 0) 1069 return (ARCHIVE_OK); 1070 1071 if ((list = malloc(list_size)) == NULL) { 1072 archive_set_error(&a->archive, errno, "Out of memory"); 1073 return (ARCHIVE_FATAL); 1074 } 1075 1076 if (*fd >= 0) 1077 list_size = extattr_list_fd(*fd, namespace, list, list_size); 1078 else if (!a->follow_symlinks) 1079 list_size = extattr_list_link(path, namespace, list, list_size); 1080 else 1081 list_size = extattr_list_file(path, namespace, list, list_size); 1082 1083 if (list_size == -1) { 1084 archive_set_error(&a->archive, errno, 1085 "Couldn't retrieve extended attributes"); 1086 free(list); 1087 return (ARCHIVE_WARN); 1088 } 1089 1090 p = list; 1091 while ((p - list) < list_size) { 1092 size_t len = 255 & (int)*p; 1093 char *name; 1094 1095 strcpy(buff, "user."); 1096 name = buff + strlen(buff); 1097 memcpy(name, p + 1, len); 1098 name[len] = '\0'; 1099 setup_xattr(a, entry, namespace, name, buff, *fd); 1100 p += 1 + len; 1101 } 1102 1103 free(list); 1104 return (ARCHIVE_OK); 1105} 1106 1107#else 1108 1109/* 1110 * Generic (stub) extended attribute support. 1111 */ 1112static int 1113setup_xattrs(struct archive_read_disk *a, 1114 struct archive_entry *entry, int *fd) 1115{ 1116 (void)a; /* UNUSED */ 1117 (void)entry; /* UNUSED */ 1118 (void)fd; /* UNUSED */ 1119 return (ARCHIVE_OK); 1120} 1121 1122#endif 1123 1124#if defined(HAVE_LINUX_FIEMAP_H) 1125 1126/* 1127 * Linux sparse interface. 1128 * 1129 * The FIEMAP ioctl returns an "extent" for each physical allocation 1130 * on disk. We need to process those to generate a more compact list 1131 * of logical file blocks. We also need to be very careful to use 1132 * FIEMAP_FLAG_SYNC here, since there are reports that Linux sometimes 1133 * does not report allocations for newly-written data that hasn't 1134 * been synced to disk. 1135 * 1136 * It's important to return a minimal sparse file list because we want 1137 * to not trigger sparse file extensions if we don't have to, since 1138 * not all readers support them. 1139 */ 1140 1141static int 1142setup_sparse(struct archive_read_disk *a, 1143 struct archive_entry *entry, int *fd) 1144{ 1145 char buff[4096]; 1146 struct fiemap *fm; 1147 struct fiemap_extent *fe; 1148 int64_t size; 1149 int count, do_fiemap, iters; 1150 int exit_sts = ARCHIVE_OK; 1151 1152 if (archive_entry_filetype(entry) != AE_IFREG 1153 || archive_entry_size(entry) <= 0 1154 || archive_entry_hardlink(entry) != NULL) 1155 return (ARCHIVE_OK); 1156 1157 if (*fd < 0) { 1158 const char *path; 1159 1160 path = archive_entry_sourcepath(entry); 1161 if (path == NULL) 1162 path = archive_entry_pathname(entry); 1163 if (a->tree != NULL) 1164 *fd = a->open_on_current_dir(a->tree, path, 1165 O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1166 else 1167 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1168 if (*fd < 0) { 1169 archive_set_error(&a->archive, errno, 1170 "Can't open `%s'", path); 1171 return (ARCHIVE_FAILED); 1172 } 1173 __archive_ensure_cloexec_flag(*fd); 1174 } 1175 1176 /* Initialize buffer to avoid the error valgrind complains about. */ 1177 memset(buff, 0, sizeof(buff)); 1178 count = (sizeof(buff) - sizeof(*fm))/sizeof(*fe); 1179 fm = (struct fiemap *)buff; 1180 fm->fm_start = 0; 1181 fm->fm_length = ~0ULL;; 1182 fm->fm_flags = FIEMAP_FLAG_SYNC; 1183 fm->fm_extent_count = count; 1184 do_fiemap = 1; 1185 size = archive_entry_size(entry); 1186 for (iters = 0; ; ++iters) { 1187 int i, r; 1188 1189 r = ioctl(*fd, FS_IOC_FIEMAP, fm); 1190 if (r < 0) { 1191 /* When something error happens, it is better we 1192 * should return ARCHIVE_OK because an earlier 1193 * version(<2.6.28) cannot perfom FS_IOC_FIEMAP. */ 1194 goto exit_setup_sparse; 1195 } 1196 if (fm->fm_mapped_extents == 0) { 1197 if (iters == 0) { 1198 /* Fully sparse file; insert a zero-length "data" entry */ 1199 archive_entry_sparse_add_entry(entry, 0, 0); 1200 } 1201 break; 1202 } 1203 fe = fm->fm_extents; 1204 for (i = 0; i < (int)fm->fm_mapped_extents; i++, fe++) { 1205 if (!(fe->fe_flags & FIEMAP_EXTENT_UNWRITTEN)) { 1206 /* The fe_length of the last block does not 1207 * adjust itself to its size files. */ 1208 int64_t length = fe->fe_length; 1209 if (fe->fe_logical + length > (uint64_t)size) 1210 length -= fe->fe_logical + length - size; 1211 if (fe->fe_logical == 0 && length == size) { 1212 /* This is not sparse. */ 1213 do_fiemap = 0; 1214 break; 1215 } 1216 if (length > 0) 1217 archive_entry_sparse_add_entry(entry, 1218 fe->fe_logical, length); 1219 } 1220 if (fe->fe_flags & FIEMAP_EXTENT_LAST) 1221 do_fiemap = 0; 1222 } 1223 if (do_fiemap) { 1224 fe = fm->fm_extents + fm->fm_mapped_extents -1; 1225 fm->fm_start = fe->fe_logical + fe->fe_length; 1226 } else 1227 break; 1228 } 1229exit_setup_sparse: 1230 return (exit_sts); 1231} 1232 1233#elif defined(SEEK_HOLE) && defined(SEEK_DATA) && defined(_PC_MIN_HOLE_SIZE) 1234 1235/* 1236 * FreeBSD and Solaris sparse interface. 1237 */ 1238 1239static int 1240setup_sparse(struct archive_read_disk *a, 1241 struct archive_entry *entry, int *fd) 1242{ 1243 int64_t size; 1244 off_t initial_off; /* FreeBSD/Solaris only, so off_t okay here */ 1245 off_t off_s, off_e; /* FreeBSD/Solaris only, so off_t okay here */ 1246 int exit_sts = ARCHIVE_OK; 1247 int check_fully_sparse = 0; 1248 1249 if (archive_entry_filetype(entry) != AE_IFREG 1250 || archive_entry_size(entry) <= 0 1251 || archive_entry_hardlink(entry) != NULL) 1252 return (ARCHIVE_OK); 1253 1254 /* Does filesystem support the reporting of hole ? */ 1255 if (*fd < 0 && a->tree != NULL) { 1256 const char *path; 1257 1258 path = archive_entry_sourcepath(entry); 1259 if (path == NULL) 1260 path = archive_entry_pathname(entry); 1261 *fd = a->open_on_current_dir(a->tree, path, 1262 O_RDONLY | O_NONBLOCK); 1263 if (*fd < 0) { 1264 archive_set_error(&a->archive, errno, 1265 "Can't open `%s'", path); 1266 return (ARCHIVE_FAILED); 1267 } 1268 } 1269 1270 if (*fd >= 0) { 1271 if (fpathconf(*fd, _PC_MIN_HOLE_SIZE) <= 0) 1272 return (ARCHIVE_OK); 1273 initial_off = lseek(*fd, 0, SEEK_CUR); 1274 if (initial_off != 0) 1275 lseek(*fd, 0, SEEK_SET); 1276 } else { 1277 const char *path; 1278 1279 path = archive_entry_sourcepath(entry); 1280 if (path == NULL) 1281 path = archive_entry_pathname(entry); 1282 1283 if (pathconf(path, _PC_MIN_HOLE_SIZE) <= 0) 1284 return (ARCHIVE_OK); 1285 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1286 if (*fd < 0) { 1287 archive_set_error(&a->archive, errno, 1288 "Can't open `%s'", path); 1289 return (ARCHIVE_FAILED); 1290 } 1291 __archive_ensure_cloexec_flag(*fd); 1292 initial_off = 0; 1293 } 1294 1295 off_s = 0; 1296 size = archive_entry_size(entry); 1297 while (off_s < size) { 1298 off_s = lseek(*fd, off_s, SEEK_DATA); 1299 if (off_s == (off_t)-1) { 1300 if (errno == ENXIO) { 1301 /* no more hole */ 1302 if (archive_entry_sparse_count(entry) == 0) { 1303 /* Potentially a fully-sparse file. */ 1304 check_fully_sparse = 1; 1305 } 1306 break; 1307 } 1308 archive_set_error(&a->archive, errno, 1309 "lseek(SEEK_HOLE) failed"); 1310 exit_sts = ARCHIVE_FAILED; 1311 goto exit_setup_sparse; 1312 } 1313 off_e = lseek(*fd, off_s, SEEK_HOLE); 1314 if (off_e == (off_t)-1) { 1315 if (errno == ENXIO) { 1316 off_e = lseek(*fd, 0, SEEK_END); 1317 if (off_e != (off_t)-1) 1318 break;/* no more data */ 1319 } 1320 archive_set_error(&a->archive, errno, 1321 "lseek(SEEK_DATA) failed"); 1322 exit_sts = ARCHIVE_FAILED; 1323 goto exit_setup_sparse; 1324 } 1325 if (off_s == 0 && off_e == size) 1326 break;/* This is not spase. */ 1327 archive_entry_sparse_add_entry(entry, off_s, 1328 off_e - off_s); 1329 off_s = off_e; 1330 } 1331 1332 if (check_fully_sparse) { 1333 if (lseek(*fd, 0, SEEK_HOLE) == 0 && 1334 lseek(*fd, 0, SEEK_END) == size) { 1335 /* Fully sparse file; insert a zero-length "data" entry */ 1336 archive_entry_sparse_add_entry(entry, 0, 0); 1337 } 1338 } 1339exit_setup_sparse: 1340 lseek(*fd, initial_off, SEEK_SET); 1341 return (exit_sts); 1342} 1343 1344#else 1345 1346/* 1347 * Generic (stub) sparse support. 1348 */ 1349static int 1350setup_sparse(struct archive_read_disk *a, 1351 struct archive_entry *entry, int *fd) 1352{ 1353 (void)a; /* UNUSED */ 1354 (void)entry; /* UNUSED */ 1355 (void)fd; /* UNUSED */ 1356 return (ARCHIVE_OK); 1357} 1358 1359#endif 1360 1361#endif /* !defined(_WIN32) || defined(__CYGWIN__) */ 1362 1363