archive_read_disk_entry_from_file.c revision 305754
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/11/contrib/libarchive/libarchive/archive_read_disk_entry_from_file.c 305754 2016-09-12 22:07:00Z 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#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 if (*fd < 0 && a->tree != NULL) { 423 if (a->follow_symlinks || 424 archive_entry_filetype(entry) != AE_IFLNK) 425 *fd = a->open_on_current_dir(a->tree, 426 accpath, O_RDONLY | O_NONBLOCK); 427 if (*fd < 0) { 428 if (a->tree_enter_working_dir(a->tree) != 0) { 429 archive_set_error(&a->archive, errno, 430 "Couldn't access %s", accpath); 431 return (ARCHIVE_FAILED); 432 } 433 } 434 } 435 436 archive_entry_acl_clear(entry); 437 438 acl = NULL; 439 440#ifdef ACL_TYPE_NFS4 441 /* Try NFS4 ACL first. */ 442 if (*fd >= 0) 443#if HAVE_ACL_GET_FD_NP 444 acl = acl_get_fd_np(*fd, ACL_TYPE_NFS4); 445#else 446 acl = acl_get_fd(*fd); 447#endif 448#if HAVE_ACL_GET_LINK_NP 449 else if (!a->follow_symlinks) 450 acl = acl_get_link_np(accpath, ACL_TYPE_NFS4); 451#else 452 else if ((!a->follow_symlinks) 453 && (archive_entry_filetype(entry) == AE_IFLNK)) 454 /* We can't get the ACL of a symlink, so we assume it can't 455 have one. */ 456 acl = NULL; 457#endif 458 else 459 acl = acl_get_file(accpath, ACL_TYPE_NFS4); 460 461#if HAVE_ACL_IS_TRIVIAL_NP 462 if (acl != NULL && acl_is_trivial_np(acl, &r) == 0) { 463 /* Ignore "trivial" ACLs that just mirror the file mode. */ 464 if (r) { 465 acl_free(acl); 466 acl = NULL; 467 /* 468 * Simultaneous NFSv4 and POSIX.1e ACLs for the same 469 * entry are not allowed, so we should return here 470 */ 471 return (ARCHIVE_OK); 472 } 473 } 474#endif 475 if (acl != NULL) { 476 translate_acl(a, entry, acl, ARCHIVE_ENTRY_ACL_TYPE_NFS4); 477 acl_free(acl); 478 return (ARCHIVE_OK); 479 } 480#endif /* ACL_TYPE_NFS4 */ 481 482 /* Retrieve access ACL from file. */ 483 if (*fd >= 0) 484 acl = acl_get_fd(*fd); 485#if HAVE_ACL_GET_LINK_NP 486 else if (!a->follow_symlinks) 487 acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS); 488#else 489 else if ((!a->follow_symlinks) 490 && (archive_entry_filetype(entry) == AE_IFLNK)) 491 /* We can't get the ACL of a symlink, so we assume it can't 492 have one. */ 493 acl = NULL; 494#endif 495 else 496 acl = acl_get_file(accpath, ACL_TYPE_ACCESS); 497 498#if HAVE_ACL_IS_TRIVIAL_NP 499 /* Ignore "trivial" ACLs that just mirror the file mode. */ 500 if (acl != NULL && acl_is_trivial_np(acl, &r) == 0) { 501 if (r) { 502 acl_free(acl); 503 acl = NULL; 504 } 505 } 506#endif 507 508 if (acl != NULL) { 509 translate_acl(a, entry, acl, 510 ARCHIVE_ENTRY_ACL_TYPE_ACCESS); 511 acl_free(acl); 512 acl = NULL; 513 } 514 515 /* Only directories can have default ACLs. */ 516 if (S_ISDIR(archive_entry_mode(entry))) { 517 acl = acl_get_file(accpath, ACL_TYPE_DEFAULT); 518 if (acl != NULL) { 519 translate_acl(a, entry, acl, 520 ARCHIVE_ENTRY_ACL_TYPE_DEFAULT); 521 acl_free(acl); 522 } 523 } 524 return (ARCHIVE_OK); 525} 526 527/* 528 * Translate system ACL into libarchive internal structure. 529 */ 530 531static struct { 532 int archive_perm; 533 int platform_perm; 534} acl_perm_map[] = { 535 {ARCHIVE_ENTRY_ACL_EXECUTE, ACL_EXECUTE}, 536 {ARCHIVE_ENTRY_ACL_WRITE, ACL_WRITE}, 537 {ARCHIVE_ENTRY_ACL_READ, ACL_READ}, 538#ifdef ACL_TYPE_NFS4 539 {ARCHIVE_ENTRY_ACL_READ_DATA, ACL_READ_DATA}, 540 {ARCHIVE_ENTRY_ACL_LIST_DIRECTORY, ACL_LIST_DIRECTORY}, 541 {ARCHIVE_ENTRY_ACL_WRITE_DATA, ACL_WRITE_DATA}, 542 {ARCHIVE_ENTRY_ACL_ADD_FILE, ACL_ADD_FILE}, 543 {ARCHIVE_ENTRY_ACL_APPEND_DATA, ACL_APPEND_DATA}, 544 {ARCHIVE_ENTRY_ACL_ADD_SUBDIRECTORY, ACL_ADD_SUBDIRECTORY}, 545 {ARCHIVE_ENTRY_ACL_READ_NAMED_ATTRS, ACL_READ_NAMED_ATTRS}, 546 {ARCHIVE_ENTRY_ACL_WRITE_NAMED_ATTRS, ACL_WRITE_NAMED_ATTRS}, 547 {ARCHIVE_ENTRY_ACL_DELETE_CHILD, ACL_DELETE_CHILD}, 548 {ARCHIVE_ENTRY_ACL_READ_ATTRIBUTES, ACL_READ_ATTRIBUTES}, 549 {ARCHIVE_ENTRY_ACL_WRITE_ATTRIBUTES, ACL_WRITE_ATTRIBUTES}, 550 {ARCHIVE_ENTRY_ACL_DELETE, ACL_DELETE}, 551 {ARCHIVE_ENTRY_ACL_READ_ACL, ACL_READ_ACL}, 552 {ARCHIVE_ENTRY_ACL_WRITE_ACL, ACL_WRITE_ACL}, 553 {ARCHIVE_ENTRY_ACL_WRITE_OWNER, ACL_WRITE_OWNER}, 554 {ARCHIVE_ENTRY_ACL_SYNCHRONIZE, ACL_SYNCHRONIZE} 555#endif 556}; 557 558#ifdef ACL_TYPE_NFS4 559static struct { 560 int archive_inherit; 561 int platform_inherit; 562} acl_inherit_map[] = { 563 {ARCHIVE_ENTRY_ACL_ENTRY_FILE_INHERIT, ACL_ENTRY_FILE_INHERIT}, 564 {ARCHIVE_ENTRY_ACL_ENTRY_DIRECTORY_INHERIT, ACL_ENTRY_DIRECTORY_INHERIT}, 565 {ARCHIVE_ENTRY_ACL_ENTRY_NO_PROPAGATE_INHERIT, ACL_ENTRY_NO_PROPAGATE_INHERIT}, 566 {ARCHIVE_ENTRY_ACL_ENTRY_INHERIT_ONLY, ACL_ENTRY_INHERIT_ONLY} 567}; 568#endif 569static int 570translate_acl(struct archive_read_disk *a, 571 struct archive_entry *entry, acl_t acl, int default_entry_acl_type) 572{ 573 acl_tag_t acl_tag; 574#ifdef ACL_TYPE_NFS4 575 acl_entry_type_t acl_type; 576 acl_flagset_t acl_flagset; 577 int brand, r; 578#endif 579 acl_entry_t acl_entry; 580 acl_permset_t acl_permset; 581 int i, entry_acl_type; 582 int s, ae_id, ae_tag, ae_perm; 583 const char *ae_name; 584 585#ifdef ACL_TYPE_NFS4 586 // FreeBSD "brands" ACLs as POSIX.1e or NFSv4 587 // Make sure the "brand" on this ACL is consistent 588 // with the default_entry_acl_type bits provided. 589 acl_get_brand_np(acl, &brand); 590 switch (brand) { 591 case ACL_BRAND_POSIX: 592 switch (default_entry_acl_type) { 593 case ARCHIVE_ENTRY_ACL_TYPE_ACCESS: 594 case ARCHIVE_ENTRY_ACL_TYPE_DEFAULT: 595 break; 596 default: 597 // XXX set warning message? 598 return ARCHIVE_FAILED; 599 } 600 break; 601 case ACL_BRAND_NFS4: 602 if (default_entry_acl_type & ~ARCHIVE_ENTRY_ACL_TYPE_NFS4) { 603 // XXX set warning message? 604 return ARCHIVE_FAILED; 605 } 606 break; 607 default: 608 // XXX set warning message? 609 return ARCHIVE_FAILED; 610 break; 611 } 612#endif 613 614 615 s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry); 616 while (s == 1) { 617 ae_id = -1; 618 ae_name = NULL; 619 ae_perm = 0; 620 621 acl_get_tag_type(acl_entry, &acl_tag); 622 switch (acl_tag) { 623 case ACL_USER: 624 ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry); 625 ae_name = archive_read_disk_uname(&a->archive, ae_id); 626 ae_tag = ARCHIVE_ENTRY_ACL_USER; 627 break; 628 case ACL_GROUP: 629 ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry); 630 ae_name = archive_read_disk_gname(&a->archive, ae_id); 631 ae_tag = ARCHIVE_ENTRY_ACL_GROUP; 632 break; 633 case ACL_MASK: 634 ae_tag = ARCHIVE_ENTRY_ACL_MASK; 635 break; 636 case ACL_USER_OBJ: 637 ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ; 638 break; 639 case ACL_GROUP_OBJ: 640 ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ; 641 break; 642 case ACL_OTHER: 643 ae_tag = ARCHIVE_ENTRY_ACL_OTHER; 644 break; 645#ifdef ACL_TYPE_NFS4 646 case ACL_EVERYONE: 647 ae_tag = ARCHIVE_ENTRY_ACL_EVERYONE; 648 break; 649#endif 650 default: 651 /* Skip types that libarchive can't support. */ 652 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry); 653 continue; 654 } 655 656 // XXX acl type maps to allow/deny/audit/YYYY bits 657 // XXX acl_get_entry_type_np on FreeBSD returns EINVAL for 658 // non-NFSv4 ACLs 659 entry_acl_type = default_entry_acl_type; 660#ifdef ACL_TYPE_NFS4 661 r = acl_get_entry_type_np(acl_entry, &acl_type); 662 if (r == 0) { 663 switch (acl_type) { 664 case ACL_ENTRY_TYPE_ALLOW: 665 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALLOW; 666 break; 667 case ACL_ENTRY_TYPE_DENY: 668 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_DENY; 669 break; 670 case ACL_ENTRY_TYPE_AUDIT: 671 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_AUDIT; 672 break; 673 case ACL_ENTRY_TYPE_ALARM: 674 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALARM; 675 break; 676 } 677 } 678 679 /* 680 * Libarchive stores "flag" (NFSv4 inheritance bits) 681 * in the ae_perm bitmap. 682 */ 683 // XXX acl_get_flagset_np on FreeBSD returns EINVAL for 684 // non-NFSv4 ACLs 685 r = acl_get_flagset_np(acl_entry, &acl_flagset); 686 if (r == 0) { 687 for (i = 0; i < (int)(sizeof(acl_inherit_map) / sizeof(acl_inherit_map[0])); ++i) { 688 if (acl_get_flag_np(acl_flagset, 689 acl_inherit_map[i].platform_inherit)) 690 ae_perm |= acl_inherit_map[i].archive_inherit; 691 } 692 } 693#endif 694 695 acl_get_permset(acl_entry, &acl_permset); 696 for (i = 0; i < (int)(sizeof(acl_perm_map) / sizeof(acl_perm_map[0])); ++i) { 697 /* 698 * acl_get_perm() is spelled differently on different 699 * platforms; see above. 700 */ 701 if (ACL_GET_PERM(acl_permset, acl_perm_map[i].platform_perm)) 702 ae_perm |= acl_perm_map[i].archive_perm; 703 } 704 705 archive_entry_acl_add_entry(entry, entry_acl_type, 706 ae_perm, ae_tag, 707 ae_id, ae_name); 708 709 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry); 710 } 711 return (ARCHIVE_OK); 712} 713#else 714static int 715setup_acls(struct archive_read_disk *a, 716 struct archive_entry *entry, int *fd) 717{ 718 (void)a; /* UNUSED */ 719 (void)entry; /* UNUSED */ 720 (void)fd; /* UNUSED */ 721 return (ARCHIVE_OK); 722} 723#endif 724 725#if (HAVE_FGETXATTR && HAVE_FLISTXATTR && HAVE_LISTXATTR && \ 726 HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR) || \ 727 (HAVE_FGETEA && HAVE_FLISTEA && HAVE_LISTEA) 728 729/* 730 * Linux and AIX extended attribute support. 731 * 732 * TODO: By using a stack-allocated buffer for the first 733 * call to getxattr(), we might be able to avoid the second 734 * call entirely. We only need the second call if the 735 * stack-allocated buffer is too small. But a modest buffer 736 * of 1024 bytes or so will often be big enough. Same applies 737 * to listxattr(). 738 */ 739 740 741static int 742setup_xattr(struct archive_read_disk *a, 743 struct archive_entry *entry, const char *name, int fd) 744{ 745 ssize_t size; 746 void *value = NULL; 747 const char *accpath; 748 749 accpath = archive_entry_sourcepath(entry); 750 if (accpath == NULL) 751 accpath = archive_entry_pathname(entry); 752 753#if HAVE_FGETXATTR 754 if (fd >= 0) 755 size = fgetxattr(fd, name, NULL, 0); 756 else if (!a->follow_symlinks) 757 size = lgetxattr(accpath, name, NULL, 0); 758 else 759 size = getxattr(accpath, name, NULL, 0); 760#elif HAVE_FGETEA 761 if (fd >= 0) 762 size = fgetea(fd, name, NULL, 0); 763 else if (!a->follow_symlinks) 764 size = lgetea(accpath, name, NULL, 0); 765 else 766 size = getea(accpath, name, NULL, 0); 767#endif 768 769 if (size == -1) { 770 archive_set_error(&a->archive, errno, 771 "Couldn't query extended attribute"); 772 return (ARCHIVE_WARN); 773 } 774 775 if (size > 0 && (value = malloc(size)) == NULL) { 776 archive_set_error(&a->archive, errno, "Out of memory"); 777 return (ARCHIVE_FATAL); 778 } 779 780#if HAVE_FGETXATTR 781 if (fd >= 0) 782 size = fgetxattr(fd, name, value, size); 783 else if (!a->follow_symlinks) 784 size = lgetxattr(accpath, name, value, size); 785 else 786 size = getxattr(accpath, name, value, size); 787#elif HAVE_FGETEA 788 if (fd >= 0) 789 size = fgetea(fd, name, value, size); 790 else if (!a->follow_symlinks) 791 size = lgetea(accpath, name, value, size); 792 else 793 size = getea(accpath, name, value, size); 794#endif 795 796 if (size == -1) { 797 archive_set_error(&a->archive, errno, 798 "Couldn't read extended attribute"); 799 return (ARCHIVE_WARN); 800 } 801 802 archive_entry_xattr_add_entry(entry, name, value, size); 803 804 free(value); 805 return (ARCHIVE_OK); 806} 807 808static int 809setup_xattrs(struct archive_read_disk *a, 810 struct archive_entry *entry, int *fd) 811{ 812 char *list, *p; 813 const char *path; 814 ssize_t list_size; 815 816 path = archive_entry_sourcepath(entry); 817 if (path == NULL) 818 path = archive_entry_pathname(entry); 819 820 if (*fd < 0 && a->tree != NULL) { 821 if (a->follow_symlinks || 822 archive_entry_filetype(entry) != AE_IFLNK) 823 *fd = a->open_on_current_dir(a->tree, path, 824 O_RDONLY | O_NONBLOCK); 825 if (*fd < 0) { 826 if (a->tree_enter_working_dir(a->tree) != 0) { 827 archive_set_error(&a->archive, errno, 828 "Couldn't access %s", path); 829 return (ARCHIVE_FAILED); 830 } 831 } 832 } 833 834#if HAVE_FLISTXATTR 835 if (*fd >= 0) 836 list_size = flistxattr(*fd, NULL, 0); 837 else if (!a->follow_symlinks) 838 list_size = llistxattr(path, NULL, 0); 839 else 840 list_size = listxattr(path, NULL, 0); 841#elif HAVE_FLISTEA 842 if (*fd >= 0) 843 list_size = flistea(*fd, NULL, 0); 844 else if (!a->follow_symlinks) 845 list_size = llistea(path, NULL, 0); 846 else 847 list_size = listea(path, NULL, 0); 848#endif 849 850 if (list_size == -1) { 851 if (errno == ENOTSUP || errno == ENOSYS) 852 return (ARCHIVE_OK); 853 archive_set_error(&a->archive, errno, 854 "Couldn't list extended attributes"); 855 return (ARCHIVE_WARN); 856 } 857 858 if (list_size == 0) 859 return (ARCHIVE_OK); 860 861 if ((list = malloc(list_size)) == NULL) { 862 archive_set_error(&a->archive, errno, "Out of memory"); 863 return (ARCHIVE_FATAL); 864 } 865 866#if HAVE_FLISTXATTR 867 if (*fd >= 0) 868 list_size = flistxattr(*fd, list, list_size); 869 else if (!a->follow_symlinks) 870 list_size = llistxattr(path, list, list_size); 871 else 872 list_size = listxattr(path, list, list_size); 873#elif HAVE_FLISTEA 874 if (*fd >= 0) 875 list_size = flistea(*fd, list, list_size); 876 else if (!a->follow_symlinks) 877 list_size = llistea(path, list, list_size); 878 else 879 list_size = listea(path, list, list_size); 880#endif 881 882 if (list_size == -1) { 883 archive_set_error(&a->archive, errno, 884 "Couldn't retrieve extended attributes"); 885 free(list); 886 return (ARCHIVE_WARN); 887 } 888 889 for (p = list; (p - list) < list_size; p += strlen(p) + 1) { 890 if (strncmp(p, "system.", 7) == 0 || 891 strncmp(p, "xfsroot.", 8) == 0) 892 continue; 893 setup_xattr(a, entry, p, *fd); 894 } 895 896 free(list); 897 return (ARCHIVE_OK); 898} 899 900#elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE && \ 901 HAVE_DECL_EXTATTR_NAMESPACE_USER 902 903/* 904 * FreeBSD extattr interface. 905 */ 906 907/* TODO: Implement this. Follow the Linux model above, but 908 * with FreeBSD-specific system calls, of course. Be careful 909 * to not include the system extattrs that hold ACLs; we handle 910 * those separately. 911 */ 912static int 913setup_xattr(struct archive_read_disk *a, struct archive_entry *entry, 914 int namespace, const char *name, const char *fullname, int fd); 915 916static int 917setup_xattr(struct archive_read_disk *a, struct archive_entry *entry, 918 int namespace, const char *name, const char *fullname, int fd) 919{ 920 ssize_t size; 921 void *value = NULL; 922 const char *accpath; 923 924 accpath = archive_entry_sourcepath(entry); 925 if (accpath == NULL) 926 accpath = archive_entry_pathname(entry); 927 928 if (fd >= 0) 929 size = extattr_get_fd(fd, namespace, name, NULL, 0); 930 else if (!a->follow_symlinks) 931 size = extattr_get_link(accpath, namespace, name, NULL, 0); 932 else 933 size = extattr_get_file(accpath, namespace, name, NULL, 0); 934 935 if (size == -1) { 936 archive_set_error(&a->archive, errno, 937 "Couldn't query extended attribute"); 938 return (ARCHIVE_WARN); 939 } 940 941 if (size > 0 && (value = malloc(size)) == NULL) { 942 archive_set_error(&a->archive, errno, "Out of memory"); 943 return (ARCHIVE_FATAL); 944 } 945 946 if (fd >= 0) 947 size = extattr_get_fd(fd, namespace, name, value, size); 948 else if (!a->follow_symlinks) 949 size = extattr_get_link(accpath, namespace, name, value, size); 950 else 951 size = extattr_get_file(accpath, namespace, name, value, size); 952 953 if (size == -1) { 954 free(value); 955 archive_set_error(&a->archive, errno, 956 "Couldn't read extended attribute"); 957 return (ARCHIVE_WARN); 958 } 959 960 archive_entry_xattr_add_entry(entry, fullname, value, size); 961 962 free(value); 963 return (ARCHIVE_OK); 964} 965 966static int 967setup_xattrs(struct archive_read_disk *a, 968 struct archive_entry *entry, int *fd) 969{ 970 char buff[512]; 971 char *list, *p; 972 ssize_t list_size; 973 const char *path; 974 int namespace = EXTATTR_NAMESPACE_USER; 975 976 path = archive_entry_sourcepath(entry); 977 if (path == NULL) 978 path = archive_entry_pathname(entry); 979 980 if (*fd < 0 && a->tree != NULL) { 981 if (a->follow_symlinks || 982 archive_entry_filetype(entry) != AE_IFLNK) 983 *fd = a->open_on_current_dir(a->tree, path, 984 O_RDONLY | O_NONBLOCK); 985 if (*fd < 0) { 986 if (a->tree_enter_working_dir(a->tree) != 0) { 987 archive_set_error(&a->archive, errno, 988 "Couldn't access %s", path); 989 return (ARCHIVE_FAILED); 990 } 991 } 992 } 993 994 if (*fd >= 0) 995 list_size = extattr_list_fd(*fd, namespace, NULL, 0); 996 else if (!a->follow_symlinks) 997 list_size = extattr_list_link(path, namespace, NULL, 0); 998 else 999 list_size = extattr_list_file(path, namespace, NULL, 0); 1000 1001 if (list_size == -1 && errno == EOPNOTSUPP) 1002 return (ARCHIVE_OK); 1003 if (list_size == -1) { 1004 archive_set_error(&a->archive, errno, 1005 "Couldn't list extended attributes"); 1006 return (ARCHIVE_WARN); 1007 } 1008 1009 if (list_size == 0) 1010 return (ARCHIVE_OK); 1011 1012 if ((list = malloc(list_size)) == NULL) { 1013 archive_set_error(&a->archive, errno, "Out of memory"); 1014 return (ARCHIVE_FATAL); 1015 } 1016 1017 if (*fd >= 0) 1018 list_size = extattr_list_fd(*fd, namespace, list, list_size); 1019 else if (!a->follow_symlinks) 1020 list_size = extattr_list_link(path, namespace, list, list_size); 1021 else 1022 list_size = extattr_list_file(path, namespace, list, list_size); 1023 1024 if (list_size == -1) { 1025 archive_set_error(&a->archive, errno, 1026 "Couldn't retrieve extended attributes"); 1027 free(list); 1028 return (ARCHIVE_WARN); 1029 } 1030 1031 p = list; 1032 while ((p - list) < list_size) { 1033 size_t len = 255 & (int)*p; 1034 char *name; 1035 1036 strcpy(buff, "user."); 1037 name = buff + strlen(buff); 1038 memcpy(name, p + 1, len); 1039 name[len] = '\0'; 1040 setup_xattr(a, entry, namespace, name, buff, *fd); 1041 p += 1 + len; 1042 } 1043 1044 free(list); 1045 return (ARCHIVE_OK); 1046} 1047 1048#else 1049 1050/* 1051 * Generic (stub) extended attribute support. 1052 */ 1053static int 1054setup_xattrs(struct archive_read_disk *a, 1055 struct archive_entry *entry, int *fd) 1056{ 1057 (void)a; /* UNUSED */ 1058 (void)entry; /* UNUSED */ 1059 (void)fd; /* UNUSED */ 1060 return (ARCHIVE_OK); 1061} 1062 1063#endif 1064 1065#if defined(HAVE_LINUX_FIEMAP_H) 1066 1067/* 1068 * Linux sparse interface. 1069 * 1070 * The FIEMAP ioctl returns an "extent" for each physical allocation 1071 * on disk. We need to process those to generate a more compact list 1072 * of logical file blocks. We also need to be very careful to use 1073 * FIEMAP_FLAG_SYNC here, since there are reports that Linux sometimes 1074 * does not report allocations for newly-written data that hasn't 1075 * been synced to disk. 1076 * 1077 * It's important to return a minimal sparse file list because we want 1078 * to not trigger sparse file extensions if we don't have to, since 1079 * not all readers support them. 1080 */ 1081 1082static int 1083setup_sparse(struct archive_read_disk *a, 1084 struct archive_entry *entry, int *fd) 1085{ 1086 char buff[4096]; 1087 struct fiemap *fm; 1088 struct fiemap_extent *fe; 1089 int64_t size; 1090 int count, do_fiemap, iters; 1091 int exit_sts = ARCHIVE_OK; 1092 1093 if (archive_entry_filetype(entry) != AE_IFREG 1094 || archive_entry_size(entry) <= 0 1095 || archive_entry_hardlink(entry) != NULL) 1096 return (ARCHIVE_OK); 1097 1098 if (*fd < 0) { 1099 const char *path; 1100 1101 path = archive_entry_sourcepath(entry); 1102 if (path == NULL) 1103 path = archive_entry_pathname(entry); 1104 if (a->tree != NULL) 1105 *fd = a->open_on_current_dir(a->tree, path, 1106 O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1107 else 1108 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1109 if (*fd < 0) { 1110 archive_set_error(&a->archive, errno, 1111 "Can't open `%s'", path); 1112 return (ARCHIVE_FAILED); 1113 } 1114 __archive_ensure_cloexec_flag(*fd); 1115 } 1116 1117 /* Initialize buffer to avoid the error valgrind complains about. */ 1118 memset(buff, 0, sizeof(buff)); 1119 count = (sizeof(buff) - sizeof(*fm))/sizeof(*fe); 1120 fm = (struct fiemap *)buff; 1121 fm->fm_start = 0; 1122 fm->fm_length = ~0ULL;; 1123 fm->fm_flags = FIEMAP_FLAG_SYNC; 1124 fm->fm_extent_count = count; 1125 do_fiemap = 1; 1126 size = archive_entry_size(entry); 1127 for (iters = 0; ; ++iters) { 1128 int i, r; 1129 1130 r = ioctl(*fd, FS_IOC_FIEMAP, fm); 1131 if (r < 0) { 1132 /* When something error happens, it is better we 1133 * should return ARCHIVE_OK because an earlier 1134 * version(<2.6.28) cannot perfom FS_IOC_FIEMAP. */ 1135 goto exit_setup_sparse; 1136 } 1137 if (fm->fm_mapped_extents == 0) { 1138 if (iters == 0) { 1139 /* Fully sparse file; insert a zero-length "data" entry */ 1140 archive_entry_sparse_add_entry(entry, 0, 0); 1141 } 1142 break; 1143 } 1144 fe = fm->fm_extents; 1145 for (i = 0; i < (int)fm->fm_mapped_extents; i++, fe++) { 1146 if (!(fe->fe_flags & FIEMAP_EXTENT_UNWRITTEN)) { 1147 /* The fe_length of the last block does not 1148 * adjust itself to its size files. */ 1149 int64_t length = fe->fe_length; 1150 if (fe->fe_logical + length > (uint64_t)size) 1151 length -= fe->fe_logical + length - size; 1152 if (fe->fe_logical == 0 && length == size) { 1153 /* This is not sparse. */ 1154 do_fiemap = 0; 1155 break; 1156 } 1157 if (length > 0) 1158 archive_entry_sparse_add_entry(entry, 1159 fe->fe_logical, length); 1160 } 1161 if (fe->fe_flags & FIEMAP_EXTENT_LAST) 1162 do_fiemap = 0; 1163 } 1164 if (do_fiemap) { 1165 fe = fm->fm_extents + fm->fm_mapped_extents -1; 1166 fm->fm_start = fe->fe_logical + fe->fe_length; 1167 } else 1168 break; 1169 } 1170exit_setup_sparse: 1171 return (exit_sts); 1172} 1173 1174#elif defined(SEEK_HOLE) && defined(SEEK_DATA) && defined(_PC_MIN_HOLE_SIZE) 1175 1176/* 1177 * FreeBSD and Solaris sparse interface. 1178 */ 1179 1180static int 1181setup_sparse(struct archive_read_disk *a, 1182 struct archive_entry *entry, int *fd) 1183{ 1184 int64_t size; 1185 off_t initial_off; /* FreeBSD/Solaris only, so off_t okay here */ 1186 off_t off_s, off_e; /* FreeBSD/Solaris only, so off_t okay here */ 1187 int exit_sts = ARCHIVE_OK; 1188 int check_fully_sparse = 0; 1189 1190 if (archive_entry_filetype(entry) != AE_IFREG 1191 || archive_entry_size(entry) <= 0 1192 || archive_entry_hardlink(entry) != NULL) 1193 return (ARCHIVE_OK); 1194 1195 /* Does filesystem support the reporting of hole ? */ 1196 if (*fd < 0 && a->tree != NULL) { 1197 const char *path; 1198 1199 path = archive_entry_sourcepath(entry); 1200 if (path == NULL) 1201 path = archive_entry_pathname(entry); 1202 *fd = a->open_on_current_dir(a->tree, path, 1203 O_RDONLY | O_NONBLOCK); 1204 if (*fd < 0) { 1205 archive_set_error(&a->archive, errno, 1206 "Can't open `%s'", path); 1207 return (ARCHIVE_FAILED); 1208 } 1209 } 1210 1211 if (*fd >= 0) { 1212 if (fpathconf(*fd, _PC_MIN_HOLE_SIZE) <= 0) 1213 return (ARCHIVE_OK); 1214 initial_off = lseek(*fd, 0, SEEK_CUR); 1215 if (initial_off != 0) 1216 lseek(*fd, 0, SEEK_SET); 1217 } else { 1218 const char *path; 1219 1220 path = archive_entry_sourcepath(entry); 1221 if (path == NULL) 1222 path = archive_entry_pathname(entry); 1223 1224 if (pathconf(path, _PC_MIN_HOLE_SIZE) <= 0) 1225 return (ARCHIVE_OK); 1226 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1227 if (*fd < 0) { 1228 archive_set_error(&a->archive, errno, 1229 "Can't open `%s'", path); 1230 return (ARCHIVE_FAILED); 1231 } 1232 __archive_ensure_cloexec_flag(*fd); 1233 initial_off = 0; 1234 } 1235 1236 off_s = 0; 1237 size = archive_entry_size(entry); 1238 while (off_s < size) { 1239 off_s = lseek(*fd, off_s, SEEK_DATA); 1240 if (off_s == (off_t)-1) { 1241 if (errno == ENXIO) { 1242 /* no more hole */ 1243 if (archive_entry_sparse_count(entry) == 0) { 1244 /* Potentially a fully-sparse file. */ 1245 check_fully_sparse = 1; 1246 } 1247 break; 1248 } 1249 archive_set_error(&a->archive, errno, 1250 "lseek(SEEK_HOLE) failed"); 1251 exit_sts = ARCHIVE_FAILED; 1252 goto exit_setup_sparse; 1253 } 1254 off_e = lseek(*fd, off_s, SEEK_HOLE); 1255 if (off_e == (off_t)-1) { 1256 if (errno == ENXIO) { 1257 off_e = lseek(*fd, 0, SEEK_END); 1258 if (off_e != (off_t)-1) 1259 break;/* no more data */ 1260 } 1261 archive_set_error(&a->archive, errno, 1262 "lseek(SEEK_DATA) failed"); 1263 exit_sts = ARCHIVE_FAILED; 1264 goto exit_setup_sparse; 1265 } 1266 if (off_s == 0 && off_e == size) 1267 break;/* This is not spase. */ 1268 archive_entry_sparse_add_entry(entry, off_s, 1269 off_e - off_s); 1270 off_s = off_e; 1271 } 1272 1273 if (check_fully_sparse) { 1274 if (lseek(*fd, 0, SEEK_HOLE) == 0 && 1275 lseek(*fd, 0, SEEK_END) == size) { 1276 /* Fully sparse file; insert a zero-length "data" entry */ 1277 archive_entry_sparse_add_entry(entry, 0, 0); 1278 } 1279 } 1280exit_setup_sparse: 1281 lseek(*fd, initial_off, SEEK_SET); 1282 return (exit_sts); 1283} 1284 1285#else 1286 1287/* 1288 * Generic (stub) sparse support. 1289 */ 1290static int 1291setup_sparse(struct archive_read_disk *a, 1292 struct archive_entry *entry, int *fd) 1293{ 1294 (void)a; /* UNUSED */ 1295 (void)entry; /* UNUSED */ 1296 (void)fd; /* UNUSED */ 1297 return (ARCHIVE_OK); 1298} 1299 1300#endif 1301 1302#endif /* !defined(_WIN32) || defined(__CYGWIN__) */ 1303 1304