2 * Copyright (c) 2003-2009 Tim Kientzle
3 * Copyright (c) 2010-2012 Michihiro NAKAJIMA
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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.
27 #include "archive_platform.h"
28 __FBSDID("$FreeBSD: head/lib/libarchive/archive_read_disk_entry_from_file.c 201084 2009-12-28 02:14:09Z kientzle $");
30 /* This is the tree-walking code for POSIX systems. */
31 #if !defined(_WIN32) || defined(__CYGWIN__)
33 #ifdef HAVE_SYS_TYPES_H
34 /* Mac OSX requires sys/types.h before sys/acl.h. */
35 #include <sys/types.h>
40 #ifdef HAVE_SYS_EXTATTR_H
41 #include <sys/extattr.h>
43 #ifdef HAVE_SYS_IOCTL_H
44 #include <sys/ioctl.h>
46 #ifdef HAVE_SYS_PARAM_H
47 #include <sys/param.h>
49 #ifdef HAVE_SYS_STAT_H
52 #if defined(HAVE_SYS_XATTR_H)
53 #include <sys/xattr.h>
54 #elif defined(HAVE_ATTR_XATTR_H)
55 #include <attr/xattr.h>
60 #ifdef HAVE_ACL_LIBACL_H
61 #include <acl/libacl.h>
63 #ifdef HAVE_COPYFILE_H
75 #ifdef HAVE_LINUX_TYPES_H
76 #include <linux/types.h>
78 #ifdef HAVE_LINUX_FIEMAP_H
79 #include <linux/fiemap.h>
81 #ifdef HAVE_LINUX_FS_H
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.
88 #ifdef HAVE_LINUX_EXT2_FS_H
89 #include <linux/ext2_fs.h> /* for Linux file flags */
91 #if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__)
92 #include <ext2fs/ext2_fs.h> /* Linux file flags, broken on Cygwin */
102 #include "archive_entry.h"
103 #include "archive_private.h"
104 #include "archive_read_disk_private.h"
111 * Linux and FreeBSD plug this obvious hole in POSIX.1e in
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
120 static int setup_acls(struct archive_read_disk *,
121 struct archive_entry *, int *fd);
122 static int setup_mac_metadata(struct archive_read_disk *,
123 struct archive_entry *, int *fd);
124 static int setup_xattrs(struct archive_read_disk *,
125 struct archive_entry *, int *fd);
126 static int setup_sparse(struct archive_read_disk *,
127 struct archive_entry *, int *fd);
130 archive_read_disk_entry_from_file(struct archive *_a,
131 struct archive_entry *entry,
133 const struct stat *st)
135 struct archive_read_disk *a = (struct archive_read_disk *)_a;
136 const char *path, *name;
141 archive_clear_error(_a);
142 path = archive_entry_sourcepath(entry);
144 path = archive_entry_pathname(entry);
146 if (a->tree == NULL) {
150 if (fstat(fd, &s) != 0) {
151 archive_set_error(&a->archive, errno,
153 return (ARCHIVE_FAILED);
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);
166 if (stat(path, &s) != 0) {
167 archive_set_error(&a->archive, errno,
168 "Can't stat %s", path);
169 return (ARCHIVE_FAILED);
173 archive_entry_copy_stat(entry, st);
176 /* Lookup uname/gname */
177 name = archive_read_disk_uname(_a, archive_entry_uid(entry));
179 archive_entry_copy_uname(entry, name);
180 name = archive_read_disk_gname(_a, archive_entry_gid(entry));
182 archive_entry_copy_gname(entry, name);
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);
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))) {
198 fd = a->open_on_current_dir(a->tree, path,
199 O_RDONLY | O_NONBLOCK | O_CLOEXEC);
201 fd = open(path, O_RDONLY | O_NONBLOCK |
203 __archive_ensure_cloexec_flag(fd);
207 r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags);
208 if (r == 0 && stflags != 0)
209 archive_entry_set_fflags(entry, stflags, 0);
214 #if defined(HAVE_READLINK) || defined(HAVE_READLINKAT)
215 if (S_ISLNK(st->st_mode)) {
216 size_t linkbuffer_len = st->st_size + 1;
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);
226 if (a->tree != NULL) {
227 #ifdef HAVE_READLINKAT
228 lnklen = readlinkat(a->tree_current_dir_fd(a->tree),
229 path, linkbuffer, linkbuffer_len);
231 if (a->tree_enter_working_dir(a->tree) != 0) {
232 archive_set_error(&a->archive, errno,
233 "Couldn't read link data");
235 return (ARCHIVE_FAILED);
237 lnklen = readlink(path, linkbuffer, linkbuffer_len);
238 #endif /* HAVE_READLINKAT */
240 lnklen = readlink(path, linkbuffer, linkbuffer_len);
242 archive_set_error(&a->archive, errno,
243 "Couldn't read link data");
245 return (ARCHIVE_FAILED);
247 linkbuffer[lnklen] = 0;
248 archive_entry_set_symlink(entry, linkbuffer);
251 #endif /* HAVE_READLINK || HAVE_READLINKAT */
253 r = setup_acls(a, entry, &fd);
254 r1 = setup_xattrs(a, entry, &fd);
257 if (a->enable_copyfile) {
258 r1 = setup_mac_metadata(a, entry, &fd);
262 r1 = setup_sparse(a, entry, &fd);
266 /* If we opened the file earlier in this function, close it. */
267 if (initial_fd != fd)
272 #if defined(__APPLE__) && defined(HAVE_COPYFILE_H)
274 * The Mac OS "copyfile()" API copies the extended metadata for a
275 * file into a separate file in AppleDouble format (see RFC 1740).
277 * Mac OS tar and cpio implementations store this extended
278 * metadata as a separate entry just before the regular entry
279 * with a "._" prefix added to the filename.
281 * Note that this is currently done unconditionally; the tar program has
282 * an option to discard this information before the archive is written.
284 * TODO: If there's a failure, report it and return ARCHIVE_WARN.
287 setup_mac_metadata(struct archive_read_disk *a,
288 struct archive_entry *entry, int *fd)
291 int copyfile_flags = COPYFILE_NOFOLLOW | COPYFILE_ACL | COPYFILE_XATTR;
292 struct stat copyfile_stat;
293 int ret = ARCHIVE_OK;
296 const char *name, *tempdir;
297 struct archive_string tempfile;
299 (void)fd; /* UNUSED */
300 name = archive_entry_sourcepath(entry);
302 name = archive_entry_pathname(entry);
304 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
305 "Can't open file to read extended attributes: No name");
306 return (ARCHIVE_WARN);
309 if (a->tree != NULL) {
310 if (a->tree_enter_working_dir(a->tree) != 0) {
311 archive_set_error(&a->archive, errno,
312 "Couldn't change dir");
313 return (ARCHIVE_FAILED);
317 /* Short-circuit if there's nothing to do. */
318 have_attrs = copyfile(name, NULL, 0, copyfile_flags | COPYFILE_CHECK);
319 if (have_attrs == -1) {
320 archive_set_error(&a->archive, errno,
321 "Could not check extended attributes");
322 return (ARCHIVE_WARN);
328 if (issetugid() == 0)
329 tempdir = getenv("TMPDIR");
332 archive_string_init(&tempfile);
333 archive_strcpy(&tempfile, tempdir);
334 archive_strcat(&tempfile, "tar.md.XXXXXX");
335 tempfd = mkstemp(tempfile.s);
337 archive_set_error(&a->archive, errno,
338 "Could not open extended attribute file");
342 __archive_ensure_cloexec_flag(tempfd);
344 /* XXX I wish copyfile() could pack directly to a memory
345 * buffer; that would avoid the temp file here. For that
346 * matter, it would be nice if fcopyfile() actually worked,
347 * that would reduce the many open/close races here. */
348 if (copyfile(name, tempfile.s, 0, copyfile_flags | COPYFILE_PACK)) {
349 archive_set_error(&a->archive, errno,
350 "Could not pack extended attributes");
354 if (fstat(tempfd, ©file_stat)) {
355 archive_set_error(&a->archive, errno,
356 "Could not check size of extended attributes");
360 buff = malloc(copyfile_stat.st_size);
362 archive_set_error(&a->archive, errno,
363 "Could not allocate memory for extended attributes");
367 if (copyfile_stat.st_size != read(tempfd, buff, copyfile_stat.st_size)) {
368 archive_set_error(&a->archive, errno,
369 "Could not read extended attributes into memory");
373 archive_entry_copy_mac_metadata(entry, buff, copyfile_stat.st_size);
380 archive_string_free(&tempfile);
388 * Stub implementation for non-Mac systems.
391 setup_mac_metadata(struct archive_read_disk *a,
392 struct archive_entry *entry, int *fd)
394 (void)a; /* UNUSED */
395 (void)entry; /* UNUSED */
396 (void)fd; /* UNUSED */
402 #if defined(HAVE_POSIX_ACL) && defined(ACL_TYPE_NFS4)
403 static int translate_acl(struct archive_read_disk *a,
404 struct archive_entry *entry, acl_t acl, int archive_entry_acl_type);
407 setup_acls(struct archive_read_disk *a,
408 struct archive_entry *entry, int *fd)
412 #if HAVE_ACL_IS_TRIVIAL_NP
416 accpath = archive_entry_sourcepath(entry);
418 accpath = archive_entry_pathname(entry);
420 archive_entry_acl_clear(entry);
422 /* Try NFS4 ACL first. */
424 acl = acl_get_fd(*fd);
425 #if HAVE_ACL_GET_LINK_NP
426 else if (!a->follow_symlinks)
427 acl = acl_get_link_np(accpath, ACL_TYPE_NFS4);
429 else if ((!a->follow_symlinks)
430 && (archive_entry_filetype(entry) == AE_IFLNK))
431 /* We can't get the ACL of a symlink, so we assume it can't
436 acl = acl_get_file(accpath, ACL_TYPE_NFS4);
437 #if HAVE_ACL_IS_TRIVIAL_NP
438 /* Ignore "trivial" ACLs that just mirror the file mode. */
439 acl_is_trivial_np(acl, &r);
446 translate_acl(a, entry, acl, ARCHIVE_ENTRY_ACL_TYPE_NFS4);
451 /* Retrieve access ACL from file. */
453 acl = acl_get_fd(*fd);
454 #if HAVE_ACL_GET_LINK_NP
455 else if (!a->follow_symlinks)
456 acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS);
458 else if ((!a->follow_symlinks)
459 && (archive_entry_filetype(entry) == AE_IFLNK))
460 /* We can't get the ACL of a symlink, so we assume it can't
465 acl = acl_get_file(accpath, ACL_TYPE_ACCESS);
467 translate_acl(a, entry, acl,
468 ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
472 /* Only directories can have default ACLs. */
473 if (S_ISDIR(archive_entry_mode(entry))) {
474 acl = acl_get_file(accpath, ACL_TYPE_DEFAULT);
476 translate_acl(a, entry, acl,
477 ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
485 * Translate system ACL into libarchive internal structure.
492 {ARCHIVE_ENTRY_ACL_EXECUTE, ACL_EXECUTE},
493 {ARCHIVE_ENTRY_ACL_WRITE, ACL_WRITE},
494 {ARCHIVE_ENTRY_ACL_READ, ACL_READ},
495 {ARCHIVE_ENTRY_ACL_READ_DATA, ACL_READ_DATA},
496 {ARCHIVE_ENTRY_ACL_LIST_DIRECTORY, ACL_LIST_DIRECTORY},
497 {ARCHIVE_ENTRY_ACL_WRITE_DATA, ACL_WRITE_DATA},
498 {ARCHIVE_ENTRY_ACL_ADD_FILE, ACL_ADD_FILE},
499 {ARCHIVE_ENTRY_ACL_APPEND_DATA, ACL_APPEND_DATA},
500 {ARCHIVE_ENTRY_ACL_ADD_SUBDIRECTORY, ACL_ADD_SUBDIRECTORY},
501 {ARCHIVE_ENTRY_ACL_READ_NAMED_ATTRS, ACL_READ_NAMED_ATTRS},
502 {ARCHIVE_ENTRY_ACL_WRITE_NAMED_ATTRS, ACL_WRITE_NAMED_ATTRS},
503 {ARCHIVE_ENTRY_ACL_DELETE_CHILD, ACL_DELETE_CHILD},
504 {ARCHIVE_ENTRY_ACL_READ_ATTRIBUTES, ACL_READ_ATTRIBUTES},
505 {ARCHIVE_ENTRY_ACL_WRITE_ATTRIBUTES, ACL_WRITE_ATTRIBUTES},
506 {ARCHIVE_ENTRY_ACL_DELETE, ACL_DELETE},
507 {ARCHIVE_ENTRY_ACL_READ_ACL, ACL_READ_ACL},
508 {ARCHIVE_ENTRY_ACL_WRITE_ACL, ACL_WRITE_ACL},
509 {ARCHIVE_ENTRY_ACL_WRITE_OWNER, ACL_WRITE_OWNER},
510 {ARCHIVE_ENTRY_ACL_SYNCHRONIZE, ACL_SYNCHRONIZE}
515 int platform_inherit;
516 } acl_inherit_map[] = {
517 {ARCHIVE_ENTRY_ACL_ENTRY_FILE_INHERIT, ACL_ENTRY_FILE_INHERIT},
518 {ARCHIVE_ENTRY_ACL_ENTRY_DIRECTORY_INHERIT, ACL_ENTRY_DIRECTORY_INHERIT},
519 {ARCHIVE_ENTRY_ACL_ENTRY_NO_PROPAGATE_INHERIT, ACL_ENTRY_NO_PROPAGATE_INHERIT},
520 {ARCHIVE_ENTRY_ACL_ENTRY_INHERIT_ONLY, ACL_ENTRY_INHERIT_ONLY}
524 translate_acl(struct archive_read_disk *a,
525 struct archive_entry *entry, acl_t acl, int default_entry_acl_type)
528 acl_entry_type_t acl_type;
529 acl_flagset_t acl_flagset;
530 acl_entry_t acl_entry;
531 acl_permset_t acl_permset;
532 int brand, i, r, entry_acl_type;
533 int s, ae_id, ae_tag, ae_perm;
537 // FreeBSD "brands" ACLs as POSIX.1e or NFSv4
538 // Make sure the "brand" on this ACL is consistent
539 // with the default_entry_acl_type bits provided.
540 acl_get_brand_np(acl, &brand);
542 case ACL_BRAND_POSIX:
543 switch (default_entry_acl_type) {
544 case ARCHIVE_ENTRY_ACL_TYPE_ACCESS:
545 case ARCHIVE_ENTRY_ACL_TYPE_DEFAULT:
548 // XXX set warning message?
549 return ARCHIVE_FAILED;
553 if (default_entry_acl_type & ~ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
554 // XXX set warning message?
555 return ARCHIVE_FAILED;
559 // XXX set warning message?
560 return ARCHIVE_FAILED;
565 s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
571 acl_get_tag_type(acl_entry, &acl_tag);
574 ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry);
575 ae_name = archive_read_disk_uname(&a->archive, ae_id);
576 ae_tag = ARCHIVE_ENTRY_ACL_USER;
579 ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry);
580 ae_name = archive_read_disk_gname(&a->archive, ae_id);
581 ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
584 ae_tag = ARCHIVE_ENTRY_ACL_MASK;
587 ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
590 ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
593 ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
596 ae_tag = ARCHIVE_ENTRY_ACL_EVERYONE;
599 /* Skip types that libarchive can't support. */
600 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
604 // XXX acl type maps to allow/deny/audit/YYYY bits
605 // XXX acl_get_entry_type_np on FreeBSD returns EINVAL for
607 entry_acl_type = default_entry_acl_type;
608 r = acl_get_entry_type_np(acl_entry, &acl_type);
611 case ACL_ENTRY_TYPE_ALLOW:
612 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALLOW;
614 case ACL_ENTRY_TYPE_DENY:
615 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_DENY;
617 case ACL_ENTRY_TYPE_AUDIT:
618 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_AUDIT;
620 case ACL_ENTRY_TYPE_ALARM:
621 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALARM;
627 * Libarchive stores "flag" (NFSv4 inheritance bits)
628 * in the ae_perm bitmap.
630 acl_get_flagset_np(acl_entry, &acl_flagset);
631 for (i = 0; i < (int)(sizeof(acl_inherit_map) / sizeof(acl_inherit_map[0])); ++i) {
632 if (acl_get_flag_np(acl_flagset,
633 acl_inherit_map[i].platform_inherit))
634 ae_perm |= acl_inherit_map[i].archive_inherit;
638 acl_get_permset(acl_entry, &acl_permset);
639 for (i = 0; i < (int)(sizeof(acl_perm_map) / sizeof(acl_perm_map[0])); ++i) {
641 * acl_get_perm() is spelled differently on different
642 * platforms; see above.
644 if (ACL_GET_PERM(acl_permset, acl_perm_map[i].platform_perm))
645 ae_perm |= acl_perm_map[i].archive_perm;
648 archive_entry_acl_add_entry(entry, entry_acl_type,
652 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
658 setup_acls(struct archive_read_disk *a,
659 struct archive_entry *entry, int *fd)
661 (void)a; /* UNUSED */
662 (void)entry; /* UNUSED */
663 (void)fd; /* UNUSED */
668 #if (HAVE_FGETXATTR && HAVE_FLISTXATTR && HAVE_LISTXATTR && \
669 HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR) || \
670 (HAVE_FGETEA && HAVE_FLISTEA && HAVE_LISTEA)
673 * Linux and AIX extended attribute support.
675 * TODO: By using a stack-allocated buffer for the first
676 * call to getxattr(), we might be able to avoid the second
677 * call entirely. We only need the second call if the
678 * stack-allocated buffer is too small. But a modest buffer
679 * of 1024 bytes or so will often be big enough. Same applies
685 setup_xattr(struct archive_read_disk *a,
686 struct archive_entry *entry, const char *name, int fd)
692 accpath = archive_entry_sourcepath(entry);
694 accpath = archive_entry_pathname(entry);
698 size = fgetxattr(fd, name, NULL, 0);
699 else if (!a->follow_symlinks)
700 size = lgetxattr(accpath, name, NULL, 0);
702 size = getxattr(accpath, name, NULL, 0);
705 size = fgetea(fd, name, NULL, 0);
706 else if (!a->follow_symlinks)
707 size = lgetea(accpath, name, NULL, 0);
709 size = getea(accpath, name, NULL, 0);
713 archive_set_error(&a->archive, errno,
714 "Couldn't query extended attribute");
715 return (ARCHIVE_WARN);
718 if (size > 0 && (value = malloc(size)) == NULL) {
719 archive_set_error(&a->archive, errno, "Out of memory");
720 return (ARCHIVE_FATAL);
725 size = fgetxattr(fd, name, value, size);
726 else if (!a->follow_symlinks)
727 size = lgetxattr(accpath, name, value, size);
729 size = getxattr(accpath, name, value, size);
732 size = fgetea(fd, name, value, size);
733 else if (!a->follow_symlinks)
734 size = lgetea(accpath, name, value, size);
736 size = getea(accpath, name, value, size);
740 archive_set_error(&a->archive, errno,
741 "Couldn't read extended attribute");
742 return (ARCHIVE_WARN);
745 archive_entry_xattr_add_entry(entry, name, value, size);
752 setup_xattrs(struct archive_read_disk *a,
753 struct archive_entry *entry, int *fd)
759 path = archive_entry_sourcepath(entry);
761 path = archive_entry_pathname(entry);
763 if (*fd < 0 && a->tree != NULL) {
764 if (a->follow_symlinks ||
765 archive_entry_filetype(entry) != AE_IFLNK)
766 *fd = a->open_on_current_dir(a->tree, path,
767 O_RDONLY | O_NONBLOCK);
769 if (a->tree_enter_working_dir(a->tree) != 0) {
770 archive_set_error(&a->archive, errno,
771 "Couldn't access %s", path);
772 return (ARCHIVE_FAILED);
779 list_size = flistxattr(*fd, NULL, 0);
780 else if (!a->follow_symlinks)
781 list_size = llistxattr(path, NULL, 0);
783 list_size = listxattr(path, NULL, 0);
786 list_size = flistea(*fd, NULL, 0);
787 else if (!a->follow_symlinks)
788 list_size = llistea(path, NULL, 0);
790 list_size = listea(path, NULL, 0);
793 if (list_size == -1) {
794 if (errno == ENOTSUP || errno == ENOSYS)
796 archive_set_error(&a->archive, errno,
797 "Couldn't list extended attributes");
798 return (ARCHIVE_WARN);
804 if ((list = malloc(list_size)) == NULL) {
805 archive_set_error(&a->archive, errno, "Out of memory");
806 return (ARCHIVE_FATAL);
811 list_size = flistxattr(*fd, list, list_size);
812 else if (!a->follow_symlinks)
813 list_size = llistxattr(path, list, list_size);
815 list_size = listxattr(path, list, list_size);
818 list_size = flistea(*fd, list, list_size);
819 else if (!a->follow_symlinks)
820 list_size = llistea(path, list, list_size);
822 list_size = listea(path, list, list_size);
825 if (list_size == -1) {
826 archive_set_error(&a->archive, errno,
827 "Couldn't retrieve extended attributes");
829 return (ARCHIVE_WARN);
832 for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
833 if (strncmp(p, "system.", 7) == 0 ||
834 strncmp(p, "xfsroot.", 8) == 0)
836 setup_xattr(a, entry, p, *fd);
843 #elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE && \
844 HAVE_DECL_EXTATTR_NAMESPACE_USER
847 * FreeBSD extattr interface.
850 /* TODO: Implement this. Follow the Linux model above, but
851 * with FreeBSD-specific system calls, of course. Be careful
852 * to not include the system extattrs that hold ACLs; we handle
856 setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
857 int namespace, const char *name, const char *fullname, int fd);
860 setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
861 int namespace, const char *name, const char *fullname, int fd)
867 accpath = archive_entry_sourcepath(entry);
869 accpath = archive_entry_pathname(entry);
872 size = extattr_get_fd(fd, namespace, name, NULL, 0);
873 else if (!a->follow_symlinks)
874 size = extattr_get_link(accpath, namespace, name, NULL, 0);
876 size = extattr_get_file(accpath, namespace, name, NULL, 0);
879 archive_set_error(&a->archive, errno,
880 "Couldn't query extended attribute");
881 return (ARCHIVE_WARN);
884 if (size > 0 && (value = malloc(size)) == NULL) {
885 archive_set_error(&a->archive, errno, "Out of memory");
886 return (ARCHIVE_FATAL);
890 size = extattr_get_fd(fd, namespace, name, value, size);
891 else if (!a->follow_symlinks)
892 size = extattr_get_link(accpath, namespace, name, value, size);
894 size = extattr_get_file(accpath, namespace, name, value, size);
898 archive_set_error(&a->archive, errno,
899 "Couldn't read extended attribute");
900 return (ARCHIVE_WARN);
903 archive_entry_xattr_add_entry(entry, fullname, value, size);
910 setup_xattrs(struct archive_read_disk *a,
911 struct archive_entry *entry, int *fd)
917 int namespace = EXTATTR_NAMESPACE_USER;
919 path = archive_entry_sourcepath(entry);
921 path = archive_entry_pathname(entry);
923 if (*fd < 0 && a->tree != NULL) {
924 if (a->follow_symlinks ||
925 archive_entry_filetype(entry) != AE_IFLNK)
926 *fd = a->open_on_current_dir(a->tree, path,
927 O_RDONLY | O_NONBLOCK);
929 if (a->tree_enter_working_dir(a->tree) != 0) {
930 archive_set_error(&a->archive, errno,
931 "Couldn't access %s", path);
932 return (ARCHIVE_FAILED);
938 list_size = extattr_list_fd(*fd, namespace, NULL, 0);
939 else if (!a->follow_symlinks)
940 list_size = extattr_list_link(path, namespace, NULL, 0);
942 list_size = extattr_list_file(path, namespace, NULL, 0);
944 if (list_size == -1 && errno == EOPNOTSUPP)
946 if (list_size == -1) {
947 archive_set_error(&a->archive, errno,
948 "Couldn't list extended attributes");
949 return (ARCHIVE_WARN);
955 if ((list = malloc(list_size)) == NULL) {
956 archive_set_error(&a->archive, errno, "Out of memory");
957 return (ARCHIVE_FATAL);
961 list_size = extattr_list_fd(*fd, namespace, list, list_size);
962 else if (!a->follow_symlinks)
963 list_size = extattr_list_link(path, namespace, list, list_size);
965 list_size = extattr_list_file(path, namespace, list, list_size);
967 if (list_size == -1) {
968 archive_set_error(&a->archive, errno,
969 "Couldn't retrieve extended attributes");
971 return (ARCHIVE_WARN);
975 while ((p - list) < list_size) {
976 size_t len = 255 & (int)*p;
979 strcpy(buff, "user.");
980 name = buff + strlen(buff);
981 memcpy(name, p + 1, len);
983 setup_xattr(a, entry, namespace, name, buff, *fd);
994 * Generic (stub) extended attribute support.
997 setup_xattrs(struct archive_read_disk *a,
998 struct archive_entry *entry, int *fd)
1000 (void)a; /* UNUSED */
1001 (void)entry; /* UNUSED */
1002 (void)fd; /* UNUSED */
1003 return (ARCHIVE_OK);
1008 #if defined(HAVE_LINUX_FIEMAP_H)
1011 * Linux sparse interface.
1013 * The FIEMAP ioctl returns an "extent" for each physical allocation
1014 * on disk. We need to process those to generate a more compact list
1015 * of logical file blocks. We also need to be very careful to use
1016 * FIEMAP_FLAG_SYNC here, since there are reports that Linux sometimes
1017 * does not report allocations for newly-written data that hasn't
1018 * been synced to disk.
1020 * It's important to return a minimal sparse file list because we want
1021 * to not trigger sparse file extensions if we don't have to, since
1022 * not all readers support them.
1026 setup_sparse(struct archive_read_disk *a,
1027 struct archive_entry *entry, int *fd)
1031 struct fiemap_extent *fe;
1033 int count, do_fiemap;
1034 int exit_sts = ARCHIVE_OK;
1036 if (archive_entry_filetype(entry) != AE_IFREG
1037 || archive_entry_size(entry) <= 0
1038 || archive_entry_hardlink(entry) != NULL)
1039 return (ARCHIVE_OK);
1044 path = archive_entry_sourcepath(entry);
1046 path = archive_entry_pathname(entry);
1047 if (a->tree != NULL)
1048 *fd = a->open_on_current_dir(a->tree, path,
1049 O_RDONLY | O_NONBLOCK | O_CLOEXEC);
1051 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
1053 archive_set_error(&a->archive, errno,
1054 "Can't open `%s'", path);
1055 return (ARCHIVE_FAILED);
1057 __archive_ensure_cloexec_flag(*fd);
1060 /* Initialize buffer to avoid the error valgrind complains about. */
1061 memset(buff, 0, sizeof(buff));
1062 count = (sizeof(buff) - sizeof(*fm))/sizeof(*fe);
1063 fm = (struct fiemap *)buff;
1065 fm->fm_length = ~0ULL;;
1066 fm->fm_flags = FIEMAP_FLAG_SYNC;
1067 fm->fm_extent_count = count;
1069 size = archive_entry_size(entry);
1073 r = ioctl(*fd, FS_IOC_FIEMAP, fm);
1075 /* When something error happens, it is better we
1076 * should return ARCHIVE_OK because an earlier
1077 * version(<2.6.28) cannot perfom FS_IOC_FIEMAP. */
1078 goto exit_setup_sparse;
1080 if (fm->fm_mapped_extents == 0)
1082 fe = fm->fm_extents;
1083 for (i = 0; i < (int)fm->fm_mapped_extents; i++, fe++) {
1084 if (!(fe->fe_flags & FIEMAP_EXTENT_UNWRITTEN)) {
1085 /* The fe_length of the last block does not
1086 * adjust itself to its size files. */
1087 int64_t length = fe->fe_length;
1088 if (fe->fe_logical + length > (uint64_t)size)
1089 length -= fe->fe_logical + length - size;
1090 if (fe->fe_logical == 0 && length == size) {
1091 /* This is not sparse. */
1096 archive_entry_sparse_add_entry(entry,
1097 fe->fe_logical, length);
1099 if (fe->fe_flags & FIEMAP_EXTENT_LAST)
1103 fe = fm->fm_extents + fm->fm_mapped_extents -1;
1104 fm->fm_start = fe->fe_logical + fe->fe_length;
1112 #elif defined(SEEK_HOLE) && defined(SEEK_DATA) && defined(_PC_MIN_HOLE_SIZE)
1115 * FreeBSD and Solaris sparse interface.
1119 setup_sparse(struct archive_read_disk *a,
1120 struct archive_entry *entry, int *fd)
1123 off_t initial_off; /* FreeBSD/Solaris only, so off_t okay here */
1124 off_t off_s, off_e; /* FreeBSD/Solaris only, so off_t okay here */
1125 int exit_sts = ARCHIVE_OK;
1127 if (archive_entry_filetype(entry) != AE_IFREG
1128 || archive_entry_size(entry) <= 0
1129 || archive_entry_hardlink(entry) != NULL)
1130 return (ARCHIVE_OK);
1132 /* Does filesystem support the reporting of hole ? */
1133 if (*fd < 0 && a->tree != NULL) {
1136 path = archive_entry_sourcepath(entry);
1138 path = archive_entry_pathname(entry);
1139 *fd = a->open_on_current_dir(a->tree, path,
1140 O_RDONLY | O_NONBLOCK);
1142 archive_set_error(&a->archive, errno,
1143 "Can't open `%s'", path);
1144 return (ARCHIVE_FAILED);
1149 if (fpathconf(*fd, _PC_MIN_HOLE_SIZE) <= 0)
1150 return (ARCHIVE_OK);
1151 initial_off = lseek(*fd, 0, SEEK_CUR);
1152 if (initial_off != 0)
1153 lseek(*fd, 0, SEEK_SET);
1157 path = archive_entry_sourcepath(entry);
1159 path = archive_entry_pathname(entry);
1161 if (pathconf(path, _PC_MIN_HOLE_SIZE) <= 0)
1162 return (ARCHIVE_OK);
1163 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
1165 archive_set_error(&a->archive, errno,
1166 "Can't open `%s'", path);
1167 return (ARCHIVE_FAILED);
1169 __archive_ensure_cloexec_flag(*fd);
1174 size = archive_entry_size(entry);
1175 while (off_s < size) {
1176 off_s = lseek(*fd, off_s, SEEK_DATA);
1177 if (off_s == (off_t)-1) {
1179 break;/* no more hole */
1180 archive_set_error(&a->archive, errno,
1181 "lseek(SEEK_HOLE) failed");
1182 exit_sts = ARCHIVE_FAILED;
1183 goto exit_setup_sparse;
1185 off_e = lseek(*fd, off_s, SEEK_HOLE);
1186 if (off_e == (off_t)-1) {
1187 if (errno == ENXIO) {
1188 off_e = lseek(*fd, 0, SEEK_END);
1189 if (off_e != (off_t)-1)
1190 break;/* no more data */
1192 archive_set_error(&a->archive, errno,
1193 "lseek(SEEK_DATA) failed");
1194 exit_sts = ARCHIVE_FAILED;
1195 goto exit_setup_sparse;
1197 if (off_s == 0 && off_e == size)
1198 break;/* This is not spase. */
1199 archive_entry_sparse_add_entry(entry, off_s,
1204 lseek(*fd, initial_off, SEEK_SET);
1211 * Generic (stub) sparse support.
1214 setup_sparse(struct archive_read_disk *a,
1215 struct archive_entry *entry, int *fd)
1217 (void)a; /* UNUSED */
1218 (void)entry; /* UNUSED */
1219 (void)fd; /* UNUSED */
1220 return (ARCHIVE_OK);
1225 #endif /* !defined(_WIN32) || defined(__CYGWIN__) */