archive_read_disk_entry_from_file.c revision 299529
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/contrib/libarchive/libarchive/archive_read_disk_entry_from_file.c 299529 2016-05-12 10:16:16Z 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 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 492static 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 520static 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 530static int 531translate_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#ifdef ACL_TYPE_NFS4 547 // FreeBSD "brands" ACLs as POSIX.1e or NFSv4 548 // Make sure the "brand" on this ACL is consistent 549 // with the default_entry_acl_type bits provided. 550 acl_get_brand_np(acl, &brand); 551 switch (brand) { 552 case ACL_BRAND_POSIX: 553 switch (default_entry_acl_type) { 554 case ARCHIVE_ENTRY_ACL_TYPE_ACCESS: 555 case ARCHIVE_ENTRY_ACL_TYPE_DEFAULT: 556 break; 557 default: 558 // XXX set warning message? 559 return ARCHIVE_FAILED; 560 } 561 break; 562 case ACL_BRAND_NFS4: 563 if (default_entry_acl_type & ~ARCHIVE_ENTRY_ACL_TYPE_NFS4) { 564 // XXX set warning message? 565 return ARCHIVE_FAILED; 566 } 567 break; 568 default: 569 // XXX set warning message? 570 return ARCHIVE_FAILED; 571 break; 572 } 573#endif 574 575 576 s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry); 577 while (s == 1) { 578 ae_id = -1; 579 ae_name = NULL; 580 ae_perm = 0; 581 582 acl_get_tag_type(acl_entry, &acl_tag); 583 switch (acl_tag) { 584 case ACL_USER: 585 ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry); 586 ae_name = archive_read_disk_uname(&a->archive, ae_id); 587 ae_tag = ARCHIVE_ENTRY_ACL_USER; 588 break; 589 case ACL_GROUP: 590 ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry); 591 ae_name = archive_read_disk_gname(&a->archive, ae_id); 592 ae_tag = ARCHIVE_ENTRY_ACL_GROUP; 593 break; 594 case ACL_MASK: 595 ae_tag = ARCHIVE_ENTRY_ACL_MASK; 596 break; 597 case ACL_USER_OBJ: 598 ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ; 599 break; 600 case ACL_GROUP_OBJ: 601 ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ; 602 break; 603 case ACL_OTHER: 604 ae_tag = ARCHIVE_ENTRY_ACL_OTHER; 605 break; 606#ifdef ACL_TYPE_NFS4 607 case ACL_EVERYONE: 608 ae_tag = ARCHIVE_ENTRY_ACL_EVERYONE; 609 break; 610#endif 611 default: 612 /* Skip types that libarchive can't support. */ 613 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry); 614 continue; 615 } 616 617 // XXX acl type maps to allow/deny/audit/YYYY bits 618 // XXX acl_get_entry_type_np on FreeBSD returns EINVAL for 619 // non-NFSv4 ACLs 620 entry_acl_type = default_entry_acl_type; 621#ifdef ACL_TYPE_NFS4 622 r = acl_get_entry_type_np(acl_entry, &acl_type); 623 if (r == 0) { 624 switch (acl_type) { 625 case ACL_ENTRY_TYPE_ALLOW: 626 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALLOW; 627 break; 628 case ACL_ENTRY_TYPE_DENY: 629 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_DENY; 630 break; 631 case ACL_ENTRY_TYPE_AUDIT: 632 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_AUDIT; 633 break; 634 case ACL_ENTRY_TYPE_ALARM: 635 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALARM; 636 break; 637 } 638 } 639 640 /* 641 * Libarchive stores "flag" (NFSv4 inheritance bits) 642 * in the ae_perm bitmap. 643 */ 644 acl_get_flagset_np(acl_entry, &acl_flagset); 645 for (i = 0; i < (int)(sizeof(acl_inherit_map) / sizeof(acl_inherit_map[0])); ++i) { 646 if (acl_get_flag_np(acl_flagset, 647 acl_inherit_map[i].platform_inherit)) 648 ae_perm |= acl_inherit_map[i].archive_inherit; 649 650 } 651#endif 652 653 acl_get_permset(acl_entry, &acl_permset); 654 for (i = 0; i < (int)(sizeof(acl_perm_map) / sizeof(acl_perm_map[0])); ++i) { 655 /* 656 * acl_get_perm() is spelled differently on different 657 * platforms; see above. 658 */ 659 if (ACL_GET_PERM(acl_permset, acl_perm_map[i].platform_perm)) 660 ae_perm |= acl_perm_map[i].archive_perm; 661 } 662 663 archive_entry_acl_add_entry(entry, entry_acl_type, 664 ae_perm, ae_tag, 665 ae_id, ae_name); 666 667 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry); 668 } 669 return (ARCHIVE_OK); 670} 671#else 672static int 673setup_acls(struct archive_read_disk *a, 674 struct archive_entry *entry, int *fd) 675{ 676 (void)a; /* UNUSED */ 677 (void)entry; /* UNUSED */ 678 (void)fd; /* UNUSED */ 679 return (ARCHIVE_OK); 680} 681#endif 682 683#if (HAVE_FGETXATTR && HAVE_FLISTXATTR && HAVE_LISTXATTR && \ 684 HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR) || \ 685 (HAVE_FGETEA && HAVE_FLISTEA && HAVE_LISTEA) 686 687/* 688 * Linux and AIX extended attribute support. 689 * 690 * TODO: By using a stack-allocated buffer for the first 691 * call to getxattr(), we might be able to avoid the second 692 * call entirely. We only need the second call if the 693 * stack-allocated buffer is too small. But a modest buffer 694 * of 1024 bytes or so will often be big enough. Same applies 695 * to listxattr(). 696 */ 697 698 699static int 700setup_xattr(struct archive_read_disk *a, 701 struct archive_entry *entry, const char *name, int fd) 702{ 703 ssize_t size; 704 void *value = NULL; 705 const char *accpath; 706 707 accpath = archive_entry_sourcepath(entry); 708 if (accpath == NULL) 709 accpath = archive_entry_pathname(entry); 710 711#if HAVE_FGETXATTR 712 if (fd >= 0) 713 size = fgetxattr(fd, name, NULL, 0); 714 else if (!a->follow_symlinks) 715 size = lgetxattr(accpath, name, NULL, 0); 716 else 717 size = getxattr(accpath, name, NULL, 0); 718#elif HAVE_FGETEA 719 if (fd >= 0) 720 size = fgetea(fd, name, NULL, 0); 721 else if (!a->follow_symlinks) 722 size = lgetea(accpath, name, NULL, 0); 723 else 724 size = getea(accpath, name, NULL, 0); 725#endif 726 727 if (size == -1) { 728 archive_set_error(&a->archive, errno, 729 "Couldn't query extended attribute"); 730 return (ARCHIVE_WARN); 731 } 732 733 if (size > 0 && (value = malloc(size)) == NULL) { 734 archive_set_error(&a->archive, errno, "Out of memory"); 735 return (ARCHIVE_FATAL); 736 } 737 738#if HAVE_FGETXATTR 739 if (fd >= 0) 740 size = fgetxattr(fd, name, value, size); 741 else if (!a->follow_symlinks) 742 size = lgetxattr(accpath, name, value, size); 743 else 744 size = getxattr(accpath, name, value, size); 745#elif HAVE_FGETEA 746 if (fd >= 0) 747 size = fgetea(fd, name, value, size); 748 else if (!a->follow_symlinks) 749 size = lgetea(accpath, name, value, size); 750 else 751 size = getea(accpath, name, value, size); 752#endif 753 754 if (size == -1) { 755 archive_set_error(&a->archive, errno, 756 "Couldn't read extended attribute"); 757 return (ARCHIVE_WARN); 758 } 759 760 archive_entry_xattr_add_entry(entry, name, value, size); 761 762 free(value); 763 return (ARCHIVE_OK); 764} 765 766static int 767setup_xattrs(struct archive_read_disk *a, 768 struct archive_entry *entry, int *fd) 769{ 770 char *list, *p; 771 const char *path; 772 ssize_t list_size; 773 774 path = archive_entry_sourcepath(entry); 775 if (path == NULL) 776 path = archive_entry_pathname(entry); 777 778 if (*fd < 0 && a->tree != NULL) { 779 if (a->follow_symlinks || 780 archive_entry_filetype(entry) != AE_IFLNK) 781 *fd = a->open_on_current_dir(a->tree, path, 782 O_RDONLY | O_NONBLOCK); 783 if (*fd < 0) { 784 if (a->tree_enter_working_dir(a->tree) != 0) { 785 archive_set_error(&a->archive, errno, 786 "Couldn't access %s", path); 787 return (ARCHIVE_FAILED); 788 } 789 } 790 } 791 792#if HAVE_FLISTXATTR 793 if (*fd >= 0) 794 list_size = flistxattr(*fd, NULL, 0); 795 else if (!a->follow_symlinks) 796 list_size = llistxattr(path, NULL, 0); 797 else 798 list_size = listxattr(path, NULL, 0); 799#elif HAVE_FLISTEA 800 if (*fd >= 0) 801 list_size = flistea(*fd, NULL, 0); 802 else if (!a->follow_symlinks) 803 list_size = llistea(path, NULL, 0); 804 else 805 list_size = listea(path, NULL, 0); 806#endif 807 808 if (list_size == -1) { 809 if (errno == ENOTSUP || errno == ENOSYS) 810 return (ARCHIVE_OK); 811 archive_set_error(&a->archive, errno, 812 "Couldn't list extended attributes"); 813 return (ARCHIVE_WARN); 814 } 815 816 if (list_size == 0) 817 return (ARCHIVE_OK); 818 819 if ((list = malloc(list_size)) == NULL) { 820 archive_set_error(&a->archive, errno, "Out of memory"); 821 return (ARCHIVE_FATAL); 822 } 823 824#if HAVE_FLISTXATTR 825 if (*fd >= 0) 826 list_size = flistxattr(*fd, list, list_size); 827 else if (!a->follow_symlinks) 828 list_size = llistxattr(path, list, list_size); 829 else 830 list_size = listxattr(path, list, list_size); 831#elif HAVE_FLISTEA 832 if (*fd >= 0) 833 list_size = flistea(*fd, list, list_size); 834 else if (!a->follow_symlinks) 835 list_size = llistea(path, list, list_size); 836 else 837 list_size = listea(path, list, list_size); 838#endif 839 840 if (list_size == -1) { 841 archive_set_error(&a->archive, errno, 842 "Couldn't retrieve extended attributes"); 843 free(list); 844 return (ARCHIVE_WARN); 845 } 846 847 for (p = list; (p - list) < list_size; p += strlen(p) + 1) { 848 if (strncmp(p, "system.", 7) == 0 || 849 strncmp(p, "xfsroot.", 8) == 0) 850 continue; 851 setup_xattr(a, entry, p, *fd); 852 } 853 854 free(list); 855 return (ARCHIVE_OK); 856} 857 858#elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE && \ 859 HAVE_DECL_EXTATTR_NAMESPACE_USER 860 861/* 862 * FreeBSD extattr interface. 863 */ 864 865/* TODO: Implement this. Follow the Linux model above, but 866 * with FreeBSD-specific system calls, of course. Be careful 867 * to not include the system extattrs that hold ACLs; we handle 868 * those separately. 869 */ 870static int 871setup_xattr(struct archive_read_disk *a, struct archive_entry *entry, 872 int namespace, const char *name, const char *fullname, int fd); 873 874static int 875setup_xattr(struct archive_read_disk *a, struct archive_entry *entry, 876 int namespace, const char *name, const char *fullname, int fd) 877{ 878 ssize_t size; 879 void *value = NULL; 880 const char *accpath; 881 882 accpath = archive_entry_sourcepath(entry); 883 if (accpath == NULL) 884 accpath = archive_entry_pathname(entry); 885 886 if (fd >= 0) 887 size = extattr_get_fd(fd, namespace, name, NULL, 0); 888 else if (!a->follow_symlinks) 889 size = extattr_get_link(accpath, namespace, name, NULL, 0); 890 else 891 size = extattr_get_file(accpath, namespace, name, NULL, 0); 892 893 if (size == -1) { 894 archive_set_error(&a->archive, errno, 895 "Couldn't query extended attribute"); 896 return (ARCHIVE_WARN); 897 } 898 899 if (size > 0 && (value = malloc(size)) == NULL) { 900 archive_set_error(&a->archive, errno, "Out of memory"); 901 return (ARCHIVE_FATAL); 902 } 903 904 if (fd >= 0) 905 size = extattr_get_fd(fd, namespace, name, value, size); 906 else if (!a->follow_symlinks) 907 size = extattr_get_link(accpath, namespace, name, value, size); 908 else 909 size = extattr_get_file(accpath, namespace, name, value, size); 910 911 if (size == -1) { 912 free(value); 913 archive_set_error(&a->archive, errno, 914 "Couldn't read extended attribute"); 915 return (ARCHIVE_WARN); 916 } 917 918 archive_entry_xattr_add_entry(entry, fullname, value, size); 919 920 free(value); 921 return (ARCHIVE_OK); 922} 923 924static int 925setup_xattrs(struct archive_read_disk *a, 926 struct archive_entry *entry, int *fd) 927{ 928 char buff[512]; 929 char *list, *p; 930 ssize_t list_size; 931 const char *path; 932 int namespace = EXTATTR_NAMESPACE_USER; 933 934 path = archive_entry_sourcepath(entry); 935 if (path == NULL) 936 path = archive_entry_pathname(entry); 937 938 if (*fd < 0 && a->tree != NULL) { 939 if (a->follow_symlinks || 940 archive_entry_filetype(entry) != AE_IFLNK) 941 *fd = a->open_on_current_dir(a->tree, path, 942 O_RDONLY | O_NONBLOCK); 943 if (*fd < 0) { 944 if (a->tree_enter_working_dir(a->tree) != 0) { 945 archive_set_error(&a->archive, errno, 946 "Couldn't access %s", path); 947 return (ARCHIVE_FAILED); 948 } 949 } 950 } 951 952 if (*fd >= 0) 953 list_size = extattr_list_fd(*fd, namespace, NULL, 0); 954 else if (!a->follow_symlinks) 955 list_size = extattr_list_link(path, namespace, NULL, 0); 956 else 957 list_size = extattr_list_file(path, namespace, NULL, 0); 958 959 if (list_size == -1 && errno == EOPNOTSUPP) 960 return (ARCHIVE_OK); 961 if (list_size == -1) { 962 archive_set_error(&a->archive, errno, 963 "Couldn't list extended attributes"); 964 return (ARCHIVE_WARN); 965 } 966 967 if (list_size == 0) 968 return (ARCHIVE_OK); 969 970 if ((list = malloc(list_size)) == NULL) { 971 archive_set_error(&a->archive, errno, "Out of memory"); 972 return (ARCHIVE_FATAL); 973 } 974 975 if (*fd >= 0) 976 list_size = extattr_list_fd(*fd, namespace, list, list_size); 977 else if (!a->follow_symlinks) 978 list_size = extattr_list_link(path, namespace, list, list_size); 979 else 980 list_size = extattr_list_file(path, namespace, list, list_size); 981 982 if (list_size == -1) { 983 archive_set_error(&a->archive, errno, 984 "Couldn't retrieve extended attributes"); 985 free(list); 986 return (ARCHIVE_WARN); 987 } 988 989 p = list; 990 while ((p - list) < list_size) { 991 size_t len = 255 & (int)*p; 992 char *name; 993 994 strcpy(buff, "user."); 995 name = buff + strlen(buff); 996 memcpy(name, p + 1, len); 997 name[len] = '\0'; 998 setup_xattr(a, entry, namespace, name, buff, *fd); 999 p += 1 + len; 1000 } 1001 1002 free(list); 1003 return (ARCHIVE_OK); 1004} 1005 1006#else 1007 1008/* 1009 * Generic (stub) extended attribute support. 1010 */ 1011static int 1012setup_xattrs(struct archive_read_disk *a, 1013 struct archive_entry *entry, int *fd) 1014{ 1015 (void)a; /* UNUSED */ 1016 (void)entry; /* UNUSED */ 1017 (void)fd; /* UNUSED */ 1018 return (ARCHIVE_OK); 1019} 1020 1021#endif 1022 1023#if defined(HAVE_LINUX_FIEMAP_H) 1024 1025/* 1026 * Linux sparse interface. 1027 * 1028 * The FIEMAP ioctl returns an "extent" for each physical allocation 1029 * on disk. We need to process those to generate a more compact list 1030 * of logical file blocks. We also need to be very careful to use 1031 * FIEMAP_FLAG_SYNC here, since there are reports that Linux sometimes 1032 * does not report allocations for newly-written data that hasn't 1033 * been synced to disk. 1034 * 1035 * It's important to return a minimal sparse file list because we want 1036 * to not trigger sparse file extensions if we don't have to, since 1037 * not all readers support them. 1038 */ 1039 1040static int 1041setup_sparse(struct archive_read_disk *a, 1042 struct archive_entry *entry, int *fd) 1043{ 1044 char buff[4096]; 1045 struct fiemap *fm; 1046 struct fiemap_extent *fe; 1047 int64_t size; 1048 int count, do_fiemap, iters; 1049 int exit_sts = ARCHIVE_OK; 1050 1051 if (archive_entry_filetype(entry) != AE_IFREG 1052 || archive_entry_size(entry) <= 0 1053 || archive_entry_hardlink(entry) != NULL) 1054 return (ARCHIVE_OK); 1055 1056 if (*fd < 0) { 1057 const char *path; 1058 1059 path = archive_entry_sourcepath(entry); 1060 if (path == NULL) 1061 path = archive_entry_pathname(entry); 1062 if (a->tree != NULL) 1063 *fd = a->open_on_current_dir(a->tree, path, 1064 O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1065 else 1066 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1067 if (*fd < 0) { 1068 archive_set_error(&a->archive, errno, 1069 "Can't open `%s'", path); 1070 return (ARCHIVE_FAILED); 1071 } 1072 __archive_ensure_cloexec_flag(*fd); 1073 } 1074 1075 /* Initialize buffer to avoid the error valgrind complains about. */ 1076 memset(buff, 0, sizeof(buff)); 1077 count = (sizeof(buff) - sizeof(*fm))/sizeof(*fe); 1078 fm = (struct fiemap *)buff; 1079 fm->fm_start = 0; 1080 fm->fm_length = ~0ULL;; 1081 fm->fm_flags = FIEMAP_FLAG_SYNC; 1082 fm->fm_extent_count = count; 1083 do_fiemap = 1; 1084 size = archive_entry_size(entry); 1085 for (iters = 0; ; ++iters) { 1086 int i, r; 1087 1088 r = ioctl(*fd, FS_IOC_FIEMAP, fm); 1089 if (r < 0) { 1090 /* When something error happens, it is better we 1091 * should return ARCHIVE_OK because an earlier 1092 * version(<2.6.28) cannot perfom FS_IOC_FIEMAP. */ 1093 goto exit_setup_sparse; 1094 } 1095 if (fm->fm_mapped_extents == 0) { 1096 if (iters == 0) { 1097 /* Fully sparse file; insert a zero-length "data" entry */ 1098 archive_entry_sparse_add_entry(entry, 0, 0); 1099 } 1100 break; 1101 } 1102 fe = fm->fm_extents; 1103 for (i = 0; i < (int)fm->fm_mapped_extents; i++, fe++) { 1104 if (!(fe->fe_flags & FIEMAP_EXTENT_UNWRITTEN)) { 1105 /* The fe_length of the last block does not 1106 * adjust itself to its size files. */ 1107 int64_t length = fe->fe_length; 1108 if (fe->fe_logical + length > (uint64_t)size) 1109 length -= fe->fe_logical + length - size; 1110 if (fe->fe_logical == 0 && length == size) { 1111 /* This is not sparse. */ 1112 do_fiemap = 0; 1113 break; 1114 } 1115 if (length > 0) 1116 archive_entry_sparse_add_entry(entry, 1117 fe->fe_logical, length); 1118 } 1119 if (fe->fe_flags & FIEMAP_EXTENT_LAST) 1120 do_fiemap = 0; 1121 } 1122 if (do_fiemap) { 1123 fe = fm->fm_extents + fm->fm_mapped_extents -1; 1124 fm->fm_start = fe->fe_logical + fe->fe_length; 1125 } else 1126 break; 1127 } 1128exit_setup_sparse: 1129 return (exit_sts); 1130} 1131 1132#elif defined(SEEK_HOLE) && defined(SEEK_DATA) && defined(_PC_MIN_HOLE_SIZE) 1133 1134/* 1135 * FreeBSD and Solaris sparse interface. 1136 */ 1137 1138static int 1139setup_sparse(struct archive_read_disk *a, 1140 struct archive_entry *entry, int *fd) 1141{ 1142 int64_t size; 1143 off_t initial_off; /* FreeBSD/Solaris only, so off_t okay here */ 1144 off_t off_s, off_e; /* FreeBSD/Solaris only, so off_t okay here */ 1145 int exit_sts = ARCHIVE_OK; 1146 int check_fully_sparse = 0; 1147 1148 if (archive_entry_filetype(entry) != AE_IFREG 1149 || archive_entry_size(entry) <= 0 1150 || archive_entry_hardlink(entry) != NULL) 1151 return (ARCHIVE_OK); 1152 1153 /* Does filesystem support the reporting of hole ? */ 1154 if (*fd < 0 && a->tree != NULL) { 1155 const char *path; 1156 1157 path = archive_entry_sourcepath(entry); 1158 if (path == NULL) 1159 path = archive_entry_pathname(entry); 1160 *fd = a->open_on_current_dir(a->tree, path, 1161 O_RDONLY | O_NONBLOCK); 1162 if (*fd < 0) { 1163 archive_set_error(&a->archive, errno, 1164 "Can't open `%s'", path); 1165 return (ARCHIVE_FAILED); 1166 } 1167 } 1168 1169 if (*fd >= 0) { 1170 if (fpathconf(*fd, _PC_MIN_HOLE_SIZE) <= 0) 1171 return (ARCHIVE_OK); 1172 initial_off = lseek(*fd, 0, SEEK_CUR); 1173 if (initial_off != 0) 1174 lseek(*fd, 0, SEEK_SET); 1175 } else { 1176 const char *path; 1177 1178 path = archive_entry_sourcepath(entry); 1179 if (path == NULL) 1180 path = archive_entry_pathname(entry); 1181 1182 if (pathconf(path, _PC_MIN_HOLE_SIZE) <= 0) 1183 return (ARCHIVE_OK); 1184 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC); 1185 if (*fd < 0) { 1186 archive_set_error(&a->archive, errno, 1187 "Can't open `%s'", path); 1188 return (ARCHIVE_FAILED); 1189 } 1190 __archive_ensure_cloexec_flag(*fd); 1191 initial_off = 0; 1192 } 1193 1194 off_s = 0; 1195 size = archive_entry_size(entry); 1196 while (off_s < size) { 1197 off_s = lseek(*fd, off_s, SEEK_DATA); 1198 if (off_s == (off_t)-1) { 1199 if (errno == ENXIO) { 1200 /* no more hole */ 1201 if (archive_entry_sparse_count(entry) == 0) { 1202 /* Potentially a fully-sparse file. */ 1203 check_fully_sparse = 1; 1204 } 1205 break; 1206 } 1207 archive_set_error(&a->archive, errno, 1208 "lseek(SEEK_HOLE) failed"); 1209 exit_sts = ARCHIVE_FAILED; 1210 goto exit_setup_sparse; 1211 } 1212 off_e = lseek(*fd, off_s, SEEK_HOLE); 1213 if (off_e == (off_t)-1) { 1214 if (errno == ENXIO) { 1215 off_e = lseek(*fd, 0, SEEK_END); 1216 if (off_e != (off_t)-1) 1217 break;/* no more data */ 1218 } 1219 archive_set_error(&a->archive, errno, 1220 "lseek(SEEK_DATA) failed"); 1221 exit_sts = ARCHIVE_FAILED; 1222 goto exit_setup_sparse; 1223 } 1224 if (off_s == 0 && off_e == size) 1225 break;/* This is not spase. */ 1226 archive_entry_sparse_add_entry(entry, off_s, 1227 off_e - off_s); 1228 off_s = off_e; 1229 } 1230 1231 if (check_fully_sparse) { 1232 if (lseek(*fd, 0, SEEK_HOLE) == 0 && 1233 lseek(*fd, 0, SEEK_END) == size) { 1234 /* Fully sparse file; insert a zero-length "data" entry */ 1235 archive_entry_sparse_add_entry(entry, 0, 0); 1236 } 1237 } 1238exit_setup_sparse: 1239 lseek(*fd, initial_off, SEEK_SET); 1240 return (exit_sts); 1241} 1242 1243#else 1244 1245/* 1246 * Generic (stub) sparse support. 1247 */ 1248static int 1249setup_sparse(struct archive_read_disk *a, 1250 struct archive_entry *entry, int *fd) 1251{ 1252 (void)a; /* UNUSED */ 1253 (void)entry; /* UNUSED */ 1254 (void)fd; /* UNUSED */ 1255 return (ARCHIVE_OK); 1256} 1257 1258#endif 1259 1260#endif /* !defined(_WIN32) || defined(__CYGWIN__) */ 1261 1262