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 * in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 /* This is the tree-walking code for POSIX systems. */
29 #if !defined(_WIN32) || defined(__CYGWIN__)
31 #include "archive_platform.h"
32 __FBSDID("$FreeBSD$");
34 #ifdef HAVE_SYS_PARAM_H
35 #include <sys/param.h>
37 #ifdef HAVE_SYS_MOUNT_H
38 #include <sys/mount.h>
40 #ifdef HAVE_SYS_STAT_H
43 #ifdef HAVE_SYS_STATFS_H
44 #include <sys/statfs.h>
46 #ifdef HAVE_SYS_STATVFS_H
47 #include <sys/statvfs.h>
49 #ifdef HAVE_SYS_TIME_H
52 #ifdef HAVE_LINUX_MAGIC_H
53 #include <linux/magic.h>
55 #ifdef HAVE_LINUX_FS_H
59 * Some Linux distributions have both linux/ext2_fs.h and ext2fs/ext2_fs.h.
60 * As the include guards don't agree, the order of include is important.
62 #ifdef HAVE_LINUX_EXT2_FS_H
63 #include <linux/ext2_fs.h> /* for Linux file flags */
65 #if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__)
66 #include <ext2fs/ext2_fs.h> /* Linux file flags, broken on Cygwin */
92 #ifdef HAVE_SYS_IOCTL_H
93 #include <sys/ioctl.h>
97 #include "archive_string.h"
98 #include "archive_entry.h"
99 #include "archive_private.h"
100 #include "archive_read_disk_private.h"
103 #error fchdir function required.
113 * This is a new directory-walking system that addresses a number
114 * of problems I've had with fts(3). In particular, it has no
115 * pathname-length limits (other than the size of 'int'), handles
116 * deep logical traversals, uses considerably less memory, and has
117 * an opaque interface (easier to modify in the future).
119 * Internally, it keeps a single list of "tree_entry" items that
120 * represent filesystem objects that require further attention.
121 * Non-directories are not kept in memory: they are pulled from
122 * readdir(), returned to the client, then freed as soon as possible.
123 * Any directory entry to be traversed gets pushed onto the stack.
125 * There is surprisingly little information that needs to be kept for
126 * each item on the stack. Just the name, depth (represented here as the
127 * string length of the parent directory's pathname), and some markers
128 * indicating how to get back to the parent (via chdir("..") for a
129 * regular dir or via fchdir(2) for a symlink).
134 * 3) Arbitrary logical traversals by closing/reopening intermediate fds.
137 struct restore_time {
149 struct tree_entry *next;
150 struct tree_entry *parent;
151 struct archive_string name;
152 size_t dirname_length;
157 /* How to return back to the parent of a symlink. */
158 int symlink_parent_fd;
159 /* How to restore time of a directory. */
160 struct restore_time restore_time;
168 #if defined(USE_READDIR_R)
177 * Buffer used for reading file contents.
179 /* Exactly allocated memory pointer. */
180 unsigned char *allocation_ptr;
181 /* Pointer adjusted to the filesystem alignment . */
186 /* Definitions for tree_entry.flags bitmap. */
187 #define isDir 1 /* This entry is a regular directory. */
188 #define isDirLink 2 /* This entry is a symbolic link to a directory. */
189 #define needsFirstVisit 4 /* This is an initial entry. */
190 #define needsDescent 8 /* This entry needs to be previsited. */
191 #define needsOpen 16 /* This is a directory that needs to be opened. */
192 #define needsAscent 32 /* This entry needs to be postvisited. */
195 * Local data for this package.
198 struct tree_entry *stack;
199 struct tree_entry *current;
201 #define INVALID_DIR_HANDLE NULL
203 #if defined(USE_READDIR_R)
204 struct dirent *dirent;
205 size_t dirent_allocated;
209 /* Error code from last failed operation. */
212 /* Dynamically-sized buffer for holding path */
213 struct archive_string path;
215 /* Last path element */
216 const char *basename;
217 /* Leading dir length */
218 size_t dirname_length;
230 /* How to restore time of a file. */
231 struct restore_time restore_time;
233 struct entry_sparse {
236 } *sparse_list, *current_sparse;
238 int sparse_list_size;
240 char initial_symlink_mode;
242 struct filesystem *current_filesystem;
243 struct filesystem *filesystem_table;
244 int initial_filesystem_id;
245 int current_filesystem_id;
246 int max_filesystem_id;
247 int allocated_filesystem;
251 int64_t entry_remaining_bytes;
253 unsigned char *entry_buff;
254 size_t entry_buff_size;
257 /* Definitions for tree.flags bitmap. */
258 #define hasStat 16 /* The st entry is valid. */
259 #define hasLstat 32 /* The lst entry is valid. */
260 #define onWorkingDir 64 /* We are on the working dir where we are
261 * reading directory entry at this time. */
262 #define needsRestoreTimes 128
263 #define onInitialDir 256 /* We are on the initial dir. */
266 tree_dir_next_posix(struct tree *t);
268 #ifdef HAVE_DIRENT_D_NAMLEN
269 /* BSD extension; avoids need for a strlen() call. */
270 #define D_NAMELEN(dp) (dp)->d_namlen
272 #define D_NAMELEN(dp) (strlen((dp)->d_name))
275 /* Initiate/terminate a tree traversal. */
276 static struct tree *tree_open(const char *, int, int);
277 static struct tree *tree_reopen(struct tree *, const char *, int);
278 static void tree_close(struct tree *);
279 static void tree_free(struct tree *);
280 static void tree_push(struct tree *, const char *, int, int64_t, int64_t,
281 struct restore_time *);
282 static int tree_enter_initial_dir(struct tree *);
283 static int tree_enter_working_dir(struct tree *);
284 static int tree_current_dir_fd(struct tree *);
287 * tree_next() returns Zero if there is no next entry, non-zero if
288 * there is. Note that directories are visited three times.
289 * Directories are always visited first as part of enumerating their
290 * parent; that is a "regular" visit. If tree_descend() is invoked at
291 * that time, the directory is added to a work list and will
292 * subsequently be visited two more times: once just after descending
293 * into the directory ("postdescent") and again just after ascending
294 * back to the parent ("postascent").
296 * TREE_ERROR_DIR is returned if the descent failed (because the
297 * directory couldn't be opened, for instance). This is returned
298 * instead of TREE_POSTDESCENT/TREE_POSTASCENT. TREE_ERROR_DIR is not a
299 * fatal error, but it does imply that the relevant subtree won't be
300 * visited. TREE_ERROR_FATAL is returned for an error that left the
301 * traversal completely hosed. Right now, this is only returned for
302 * chdir() failures during ascent.
304 #define TREE_REGULAR 1
305 #define TREE_POSTDESCENT 2
306 #define TREE_POSTASCENT 3
307 #define TREE_ERROR_DIR -1
308 #define TREE_ERROR_FATAL -2
310 static int tree_next(struct tree *);
313 * Return information about the current entry.
317 * The current full pathname, length of the full pathname, and a name
318 * that can be used to access the file. Because tree does use chdir
319 * extensively, the access path is almost never the same as the full
322 * TODO: On platforms that support it, use openat()-style operations
323 * to eliminate the chdir() operations entirely while still supporting
324 * arbitrarily deep traversals. This makes access_path troublesome to
325 * support, of course, which means we'll need a rich enough interface
326 * that clients can function without it. (In particular, we'll need
327 * tree_current_open() that returns an open file descriptor.)
330 static const char *tree_current_path(struct tree *);
331 static const char *tree_current_access_path(struct tree *);
334 * Request the lstat() or stat() data for the current path. Since the
335 * tree package needs to do some of this anyway, and caches the
336 * results, you should take advantage of it here if you need it rather
337 * than make a redundant stat() or lstat() call of your own.
339 static const struct stat *tree_current_stat(struct tree *);
340 static const struct stat *tree_current_lstat(struct tree *);
341 static int tree_current_is_symblic_link_target(struct tree *);
343 /* The following functions use tricks to avoid a certain number of
344 * stat()/lstat() calls. */
345 /* "is_physical_dir" is equivalent to S_ISDIR(tree_current_lstat()->st_mode) */
346 static int tree_current_is_physical_dir(struct tree *);
347 /* "is_dir" is equivalent to S_ISDIR(tree_current_stat()->st_mode) */
348 static int tree_current_is_dir(struct tree *);
349 static int update_current_filesystem(struct archive_read_disk *a,
351 static int setup_current_filesystem(struct archive_read_disk *);
352 static int tree_target_is_same_as_parent(struct tree *, const struct stat *);
354 static int _archive_read_disk_open(struct archive *, const char *);
355 static int _archive_read_free(struct archive *);
356 static int _archive_read_close(struct archive *);
357 static int _archive_read_data_block(struct archive *,
358 const void **, size_t *, int64_t *);
359 static int _archive_read_next_header(struct archive *,
360 struct archive_entry **);
361 static int _archive_read_next_header2(struct archive *,
362 struct archive_entry *);
363 static const char *trivial_lookup_gname(void *, int64_t gid);
364 static const char *trivial_lookup_uname(void *, int64_t uid);
365 static int setup_sparse(struct archive_read_disk *, struct archive_entry *);
366 static int close_and_restore_time(int fd, struct tree *,
367 struct restore_time *);
368 static int open_on_current_dir(struct tree *, const char *, int);
369 static int tree_dup(int);
372 static struct archive_vtable *
373 archive_read_disk_vtable(void)
375 static struct archive_vtable av;
376 static int inited = 0;
379 av.archive_free = _archive_read_free;
380 av.archive_close = _archive_read_close;
381 av.archive_read_data_block = _archive_read_data_block;
382 av.archive_read_next_header = _archive_read_next_header;
383 av.archive_read_next_header2 = _archive_read_next_header2;
390 archive_read_disk_gname(struct archive *_a, la_int64_t gid)
392 struct archive_read_disk *a = (struct archive_read_disk *)_a;
393 if (ARCHIVE_OK != __archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
394 ARCHIVE_STATE_ANY, "archive_read_disk_gname"))
396 if (a->lookup_gname == NULL)
398 return ((*a->lookup_gname)(a->lookup_gname_data, gid));
402 archive_read_disk_uname(struct archive *_a, la_int64_t uid)
404 struct archive_read_disk *a = (struct archive_read_disk *)_a;
405 if (ARCHIVE_OK != __archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
406 ARCHIVE_STATE_ANY, "archive_read_disk_uname"))
408 if (a->lookup_uname == NULL)
410 return ((*a->lookup_uname)(a->lookup_uname_data, uid));
414 archive_read_disk_set_gname_lookup(struct archive *_a,
416 const char * (*lookup_gname)(void *private, la_int64_t gid),
417 void (*cleanup_gname)(void *private))
419 struct archive_read_disk *a = (struct archive_read_disk *)_a;
420 archive_check_magic(&a->archive, ARCHIVE_READ_DISK_MAGIC,
421 ARCHIVE_STATE_ANY, "archive_read_disk_set_gname_lookup");
423 if (a->cleanup_gname != NULL && a->lookup_gname_data != NULL)
424 (a->cleanup_gname)(a->lookup_gname_data);
426 a->lookup_gname = lookup_gname;
427 a->cleanup_gname = cleanup_gname;
428 a->lookup_gname_data = private_data;
433 archive_read_disk_set_uname_lookup(struct archive *_a,
435 const char * (*lookup_uname)(void *private, la_int64_t uid),
436 void (*cleanup_uname)(void *private))
438 struct archive_read_disk *a = (struct archive_read_disk *)_a;
439 archive_check_magic(&a->archive, ARCHIVE_READ_DISK_MAGIC,
440 ARCHIVE_STATE_ANY, "archive_read_disk_set_uname_lookup");
442 if (a->cleanup_uname != NULL && a->lookup_uname_data != NULL)
443 (a->cleanup_uname)(a->lookup_uname_data);
445 a->lookup_uname = lookup_uname;
446 a->cleanup_uname = cleanup_uname;
447 a->lookup_uname_data = private_data;
452 * Create a new archive_read_disk object and initialize it with global state.
455 archive_read_disk_new(void)
457 struct archive_read_disk *a;
459 a = (struct archive_read_disk *)calloc(1, sizeof(*a));
462 a->archive.magic = ARCHIVE_READ_DISK_MAGIC;
463 a->archive.state = ARCHIVE_STATE_NEW;
464 a->archive.vtable = archive_read_disk_vtable();
465 a->entry = archive_entry_new2(&a->archive);
466 a->lookup_uname = trivial_lookup_uname;
467 a->lookup_gname = trivial_lookup_gname;
468 a->flags = ARCHIVE_READDISK_MAC_COPYFILE;
469 a->open_on_current_dir = open_on_current_dir;
470 a->tree_current_dir_fd = tree_current_dir_fd;
471 a->tree_enter_working_dir = tree_enter_working_dir;
472 return (&a->archive);
476 _archive_read_free(struct archive *_a)
478 struct archive_read_disk *a = (struct archive_read_disk *)_a;
483 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
484 ARCHIVE_STATE_ANY | ARCHIVE_STATE_FATAL, "archive_read_free");
486 if (a->archive.state != ARCHIVE_STATE_CLOSED)
487 r = _archive_read_close(&a->archive);
492 if (a->cleanup_gname != NULL && a->lookup_gname_data != NULL)
493 (a->cleanup_gname)(a->lookup_gname_data);
494 if (a->cleanup_uname != NULL && a->lookup_uname_data != NULL)
495 (a->cleanup_uname)(a->lookup_uname_data);
496 archive_string_free(&a->archive.error_string);
497 archive_entry_free(a->entry);
498 a->archive.magic = 0;
499 __archive_clean(&a->archive);
505 _archive_read_close(struct archive *_a)
507 struct archive_read_disk *a = (struct archive_read_disk *)_a;
509 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
510 ARCHIVE_STATE_ANY | ARCHIVE_STATE_FATAL, "archive_read_close");
512 if (a->archive.state != ARCHIVE_STATE_FATAL)
513 a->archive.state = ARCHIVE_STATE_CLOSED;
521 setup_symlink_mode(struct archive_read_disk *a, char symlink_mode,
524 a->symlink_mode = symlink_mode;
525 a->follow_symlinks = follow_symlinks;
526 if (a->tree != NULL) {
527 a->tree->initial_symlink_mode = a->symlink_mode;
528 a->tree->symlink_mode = a->symlink_mode;
533 archive_read_disk_set_symlink_logical(struct archive *_a)
535 struct archive_read_disk *a = (struct archive_read_disk *)_a;
536 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
537 ARCHIVE_STATE_ANY, "archive_read_disk_set_symlink_logical");
538 setup_symlink_mode(a, 'L', 1);
543 archive_read_disk_set_symlink_physical(struct archive *_a)
545 struct archive_read_disk *a = (struct archive_read_disk *)_a;
546 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
547 ARCHIVE_STATE_ANY, "archive_read_disk_set_symlink_physical");
548 setup_symlink_mode(a, 'P', 0);
553 archive_read_disk_set_symlink_hybrid(struct archive *_a)
555 struct archive_read_disk *a = (struct archive_read_disk *)_a;
556 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
557 ARCHIVE_STATE_ANY, "archive_read_disk_set_symlink_hybrid");
558 setup_symlink_mode(a, 'H', 1);/* Follow symlinks initially. */
563 archive_read_disk_set_atime_restored(struct archive *_a)
565 struct archive_read_disk *a = (struct archive_read_disk *)_a;
566 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
567 ARCHIVE_STATE_ANY, "archive_read_disk_restore_atime");
569 a->flags |= ARCHIVE_READDISK_RESTORE_ATIME;
571 a->tree->flags |= needsRestoreTimes;
574 /* Display warning and unset flag */
575 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
576 "Cannot restore access time on this system");
577 a->flags &= ~ARCHIVE_READDISK_RESTORE_ATIME;
578 return (ARCHIVE_WARN);
583 archive_read_disk_set_behavior(struct archive *_a, int flags)
585 struct archive_read_disk *a = (struct archive_read_disk *)_a;
588 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
589 ARCHIVE_STATE_ANY, "archive_read_disk_honor_nodump");
593 if (flags & ARCHIVE_READDISK_RESTORE_ATIME)
594 r = archive_read_disk_set_atime_restored(_a);
597 a->tree->flags &= ~needsRestoreTimes;
603 * Trivial implementations of gname/uname lookup functions.
604 * These are normally overridden by the client, but these stub
605 * versions ensure that we always have something that works.
608 trivial_lookup_gname(void *private_data, int64_t gid)
610 (void)private_data; /* UNUSED */
611 (void)gid; /* UNUSED */
616 trivial_lookup_uname(void *private_data, int64_t uid)
618 (void)private_data; /* UNUSED */
619 (void)uid; /* UNUSED */
624 * Allocate memory for the reading buffer adjusted to the filesystem
628 setup_suitable_read_buffer(struct archive_read_disk *a)
630 struct tree *t = a->tree;
631 struct filesystem *cf = t->current_filesystem;
635 if (cf->allocation_ptr == NULL) {
636 /* If we couldn't get a filesystem alignment,
637 * we use 4096 as default value but we won't use
638 * O_DIRECT to open() and openat() operations. */
639 long xfer_align = (cf->xfer_align == -1)?4096:cf->xfer_align;
641 if (cf->max_xfer_size != -1)
642 asize = cf->max_xfer_size + xfer_align;
644 long incr = cf->incr_xfer_size;
645 /* Some platform does not set a proper value to
648 incr = cf->min_xfer_size;
649 if (cf->min_xfer_size < 0) {
653 asize = cf->min_xfer_size;
655 /* Increase a buffer size up to 64K bytes in
656 * a proper increment size. */
657 while (asize < 1024*64)
659 /* Take a margin to adjust to the filesystem
663 cf->allocation_ptr = malloc(asize);
664 if (cf->allocation_ptr == NULL) {
665 archive_set_error(&a->archive, ENOMEM,
666 "Couldn't allocate memory");
667 a->archive.state = ARCHIVE_STATE_FATAL;
668 return (ARCHIVE_FATAL);
672 * Calculate proper address for the filesystem.
674 s = (uintptr_t)cf->allocation_ptr;
680 * Set a read buffer pointer in the proper alignment of
681 * the current filesystem.
683 cf->buff = cf->allocation_ptr + s;
684 cf->buff_size = asize - xfer_align;
690 _archive_read_data_block(struct archive *_a, const void **buff,
691 size_t *size, int64_t *offset)
693 struct archive_read_disk *a = (struct archive_read_disk *)_a;
694 struct tree *t = a->tree;
697 int64_t sparse_bytes;
699 int empty_sparse_region = 0;
701 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, ARCHIVE_STATE_DATA,
702 "archive_read_data_block");
704 if (t->entry_eof || t->entry_remaining_bytes <= 0) {
706 goto abort_read_data;
710 * Open the current file.
712 if (t->entry_fd < 0) {
713 int flags = O_RDONLY | O_BINARY | O_CLOEXEC;
716 * Eliminate or reduce cache effects if we can.
718 * Carefully consider this to be enabled.
720 #if defined(O_DIRECT) && 0/* Disabled for now */
721 if (t->current_filesystem->xfer_align != -1 &&
725 #if defined(O_NOATIME)
727 * Linux has O_NOATIME flag; use it if we need.
729 if ((t->flags & needsRestoreTimes) != 0 &&
730 t->restore_time.noatime == 0)
733 t->entry_fd = open_on_current_dir(t,
734 tree_current_access_path(t), flags);
735 __archive_ensure_cloexec_flag(t->entry_fd);
736 #if defined(O_NOATIME)
738 * When we did open the file with O_NOATIME flag,
739 * if successful, set 1 to t->restore_time.noatime
740 * not to restore an atime of the file later.
741 * if failed by EPERM, retry it without O_NOATIME flag.
743 if (flags & O_NOATIME) {
744 if (t->entry_fd >= 0)
745 t->restore_time.noatime = 1;
746 else if (errno == EPERM)
750 if (t->entry_fd < 0) {
751 archive_set_error(&a->archive, errno,
752 "Couldn't open %s", tree_current_path(t));
754 tree_enter_initial_dir(t);
755 goto abort_read_data;
757 tree_enter_initial_dir(t);
761 * Allocate read buffer if not allocated.
763 if (t->current_filesystem->allocation_ptr == NULL) {
764 r = setup_suitable_read_buffer(a);
765 if (r != ARCHIVE_OK) {
766 a->archive.state = ARCHIVE_STATE_FATAL;
767 goto abort_read_data;
770 t->entry_buff = t->current_filesystem->buff;
771 t->entry_buff_size = t->current_filesystem->buff_size;
773 buffbytes = t->entry_buff_size;
774 if ((int64_t)buffbytes > t->current_sparse->length)
775 buffbytes = t->current_sparse->length;
777 if (t->current_sparse->length == 0)
778 empty_sparse_region = 1;
782 * TODO: Should we consider t->current_filesystem->xfer_align?
784 if (t->current_sparse->offset > t->entry_total) {
785 if (lseek(t->entry_fd,
786 (off_t)t->current_sparse->offset, SEEK_SET) < 0) {
787 archive_set_error(&a->archive, errno, "Seek error");
789 a->archive.state = ARCHIVE_STATE_FATAL;
790 goto abort_read_data;
792 sparse_bytes = t->current_sparse->offset - t->entry_total;
793 t->entry_remaining_bytes -= sparse_bytes;
794 t->entry_total += sparse_bytes;
798 * Read file contents.
801 bytes = read(t->entry_fd, t->entry_buff, buffbytes);
803 archive_set_error(&a->archive, errno, "Read error");
805 a->archive.state = ARCHIVE_STATE_FATAL;
806 goto abort_read_data;
811 * Return an EOF unless we've read a leading empty sparse region, which
812 * is used to represent fully-sparse files.
814 if (bytes == 0 && !empty_sparse_region) {
818 goto abort_read_data;
820 *buff = t->entry_buff;
822 *offset = t->entry_total;
823 t->entry_total += bytes;
824 t->entry_remaining_bytes -= bytes;
825 if (t->entry_remaining_bytes == 0) {
826 /* Close the current file descriptor */
827 close_and_restore_time(t->entry_fd, t, &t->restore_time);
831 t->current_sparse->offset += bytes;
832 t->current_sparse->length -= bytes;
833 if (t->current_sparse->length == 0 && !t->entry_eof)
840 *offset = t->entry_total;
841 if (t->entry_fd >= 0) {
842 /* Close the current file descriptor */
843 close_and_restore_time(t->entry_fd, t, &t->restore_time);
850 next_entry(struct archive_read_disk *a, struct tree *t,
851 struct archive_entry *entry)
853 const struct stat *st; /* info to use for this entry */
854 const struct stat *lst;/* lstat() information */
856 int delayed, delayed_errno, descend, r;
857 struct archive_string delayed_str;
859 delayed = ARCHIVE_OK;
861 archive_string_init(&delayed_str);
867 switch (tree_next(t)) {
868 case TREE_ERROR_FATAL:
869 archive_set_error(&a->archive, t->tree_errno,
870 "%s: Unable to continue traversing directory tree",
871 tree_current_path(t));
872 a->archive.state = ARCHIVE_STATE_FATAL;
873 tree_enter_initial_dir(t);
874 return (ARCHIVE_FATAL);
876 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
877 "%s: Couldn't visit directory",
878 tree_current_path(t));
879 tree_enter_initial_dir(t);
880 return (ARCHIVE_FAILED);
882 tree_enter_initial_dir(t);
883 return (ARCHIVE_EOF);
884 case TREE_POSTDESCENT:
885 case TREE_POSTASCENT:
888 lst = tree_current_lstat(t);
890 if (errno == ENOENT && t->depth > 0) {
891 delayed = ARCHIVE_WARN;
892 delayed_errno = errno;
893 if (delayed_str.length == 0) {
894 archive_string_sprintf(&delayed_str,
895 "%s", tree_current_path(t));
897 archive_string_sprintf(&delayed_str,
898 " %s", tree_current_path(t));
901 archive_set_error(&a->archive, errno,
903 tree_current_path(t));
904 tree_enter_initial_dir(t);
905 return (ARCHIVE_FAILED);
910 } while (lst == NULL);
913 if (a->flags & ARCHIVE_READDISK_MAC_COPYFILE) {
914 /* If we're using copyfile(), ignore "._XXX" files. */
915 const char *bname = strrchr(tree_current_path(t), '/');
917 bname = tree_current_path(t);
920 if (bname[0] == '.' && bname[1] == '_')
921 return (ARCHIVE_RETRY);
925 archive_entry_copy_pathname(entry, tree_current_path(t));
927 * Perform path matching.
930 r = archive_match_path_excluded(a->matching, entry);
932 archive_set_error(&(a->archive), errno,
933 "Failed : %s", archive_error_string(a->matching));
937 if (a->excluded_cb_func)
938 a->excluded_cb_func(&(a->archive),
939 a->excluded_cb_data, entry);
940 return (ARCHIVE_RETRY);
945 * Distinguish 'L'/'P'/'H' symlink following.
947 switch(t->symlink_mode) {
949 /* 'H': After the first item, rest like 'P'. */
950 t->symlink_mode = 'P';
951 /* 'H': First item (from command line) like 'L'. */
954 /* 'L': Do descend through a symlink to dir. */
955 descend = tree_current_is_dir(t);
956 /* 'L': Follow symlinks to files. */
957 a->symlink_mode = 'L';
958 a->follow_symlinks = 1;
959 /* 'L': Archive symlinks as targets, if we can. */
960 st = tree_current_stat(t);
961 if (st != NULL && !tree_target_is_same_as_parent(t, st))
963 /* If stat fails, we have a broken symlink;
964 * in that case, don't follow the link. */
967 /* 'P': Don't descend through a symlink to dir. */
968 descend = tree_current_is_physical_dir(t);
969 /* 'P': Don't follow symlinks to files. */
970 a->symlink_mode = 'P';
971 a->follow_symlinks = 0;
972 /* 'P': Archive symlinks as symlinks. */
977 if (update_current_filesystem(a, st->st_dev) != ARCHIVE_OK) {
978 a->archive.state = ARCHIVE_STATE_FATAL;
979 tree_enter_initial_dir(t);
980 return (ARCHIVE_FATAL);
982 if (t->initial_filesystem_id == -1)
983 t->initial_filesystem_id = t->current_filesystem_id;
984 if (a->flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS) {
985 if (t->initial_filesystem_id != t->current_filesystem_id)
988 t->descend = descend;
992 * If the file is marked with nodump flag, do not return this entry.
994 if (a->flags & ARCHIVE_READDISK_HONOR_NODUMP) {
995 #if defined(HAVE_STRUCT_STAT_ST_FLAGS) && defined(UF_NODUMP)
996 if (st->st_flags & UF_NODUMP)
997 return (ARCHIVE_RETRY);
998 #elif (defined(FS_IOC_GETFLAGS) && defined(FS_NODUMP_FL) && \
999 defined(HAVE_WORKING_FS_IOC_GETFLAGS)) || \
1000 (defined(EXT2_IOC_GETFLAGS) && defined(EXT2_NODUMP_FL) && \
1001 defined(HAVE_WORKING_EXT2_IOC_GETFLAGS))
1002 if (S_ISREG(st->st_mode) || S_ISDIR(st->st_mode)) {
1005 t->entry_fd = open_on_current_dir(t,
1006 tree_current_access_path(t),
1007 O_RDONLY | O_NONBLOCK | O_CLOEXEC);
1008 __archive_ensure_cloexec_flag(t->entry_fd);
1009 if (t->entry_fd >= 0) {
1010 r = ioctl(t->entry_fd,
1011 #ifdef FS_IOC_GETFLAGS
1018 if (r == 0 && (stflags & FS_NODUMP_FL) != 0)
1020 if (r == 0 && (stflags & EXT2_NODUMP_FL) != 0)
1022 return (ARCHIVE_RETRY);
1028 archive_entry_copy_stat(entry, st);
1030 /* Save the times to be restored. This must be in before
1031 * calling archive_read_disk_descend() or any chance of it,
1032 * especially, invoking a callback. */
1033 t->restore_time.mtime = archive_entry_mtime(entry);
1034 t->restore_time.mtime_nsec = archive_entry_mtime_nsec(entry);
1035 t->restore_time.atime = archive_entry_atime(entry);
1036 t->restore_time.atime_nsec = archive_entry_atime_nsec(entry);
1037 t->restore_time.filetype = archive_entry_filetype(entry);
1038 t->restore_time.noatime = t->current_filesystem->noatime;
1041 * Perform time matching.
1044 r = archive_match_time_excluded(a->matching, entry);
1046 archive_set_error(&(a->archive), errno,
1047 "Failed : %s", archive_error_string(a->matching));
1051 if (a->excluded_cb_func)
1052 a->excluded_cb_func(&(a->archive),
1053 a->excluded_cb_data, entry);
1054 return (ARCHIVE_RETRY);
1058 /* Lookup uname/gname */
1059 name = archive_read_disk_uname(&(a->archive), archive_entry_uid(entry));
1061 archive_entry_copy_uname(entry, name);
1062 name = archive_read_disk_gname(&(a->archive), archive_entry_gid(entry));
1064 archive_entry_copy_gname(entry, name);
1067 * Perform owner matching.
1070 r = archive_match_owner_excluded(a->matching, entry);
1072 archive_set_error(&(a->archive), errno,
1073 "Failed : %s", archive_error_string(a->matching));
1077 if (a->excluded_cb_func)
1078 a->excluded_cb_func(&(a->archive),
1079 a->excluded_cb_data, entry);
1080 return (ARCHIVE_RETRY);
1085 * Invoke a meta data filter callback.
1087 if (a->metadata_filter_func) {
1088 if (!a->metadata_filter_func(&(a->archive),
1089 a->metadata_filter_data, entry))
1090 return (ARCHIVE_RETRY);
1094 * Populate the archive_entry with metadata from the disk.
1096 archive_entry_copy_sourcepath(entry, tree_current_access_path(t));
1097 r = archive_read_disk_entry_from_file(&(a->archive), entry,
1100 if (r == ARCHIVE_OK) {
1102 if (r != ARCHIVE_OK) {
1103 archive_string_sprintf(&delayed_str, ": %s",
1104 "File removed before we read it");
1105 archive_set_error(&(a->archive), delayed_errno,
1106 "%s", delayed_str.s);
1109 archive_string_free(&delayed_str);
1115 _archive_read_next_header(struct archive *_a, struct archive_entry **entryp)
1118 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1120 ret = _archive_read_next_header2(_a, a->entry);
1126 _archive_read_next_header2(struct archive *_a, struct archive_entry *entry)
1128 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1132 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
1133 ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
1134 "archive_read_next_header2");
1137 if (t->entry_fd >= 0) {
1138 close_and_restore_time(t->entry_fd, t, &t->restore_time);
1142 archive_entry_clear(entry);
1145 r = next_entry(a, t, entry);
1146 if (t->entry_fd >= 0) {
1151 if (r == ARCHIVE_RETRY) {
1152 archive_entry_clear(entry);
1158 /* Return to the initial directory. */
1159 tree_enter_initial_dir(t);
1162 * EOF and FATAL are persistent at this layer. By
1163 * modifying the state, we guarantee that future calls to
1164 * read a header or read data will fail.
1168 a->archive.state = ARCHIVE_STATE_EOF;
1172 /* Overwrite the sourcepath based on the initial directory. */
1173 archive_entry_copy_sourcepath(entry, tree_current_path(t));
1175 if (archive_entry_filetype(entry) == AE_IFREG) {
1176 t->nlink = archive_entry_nlink(entry);
1177 t->entry_remaining_bytes = archive_entry_size(entry);
1178 t->entry_eof = (t->entry_remaining_bytes == 0)? 1: 0;
1179 if (!t->entry_eof &&
1180 setup_sparse(a, entry) != ARCHIVE_OK)
1181 return (ARCHIVE_FATAL);
1183 t->entry_remaining_bytes = 0;
1186 a->archive.state = ARCHIVE_STATE_DATA;
1191 a->archive.state = ARCHIVE_STATE_FATAL;
1195 __archive_reset_read_data(&a->archive);
1200 setup_sparse(struct archive_read_disk *a, struct archive_entry *entry)
1202 struct tree *t = a->tree;
1203 int64_t length, offset;
1206 t->sparse_count = archive_entry_sparse_reset(entry);
1207 if (t->sparse_count+1 > t->sparse_list_size) {
1208 free(t->sparse_list);
1209 t->sparse_list_size = t->sparse_count + 1;
1210 t->sparse_list = malloc(sizeof(t->sparse_list[0]) *
1211 t->sparse_list_size);
1212 if (t->sparse_list == NULL) {
1213 t->sparse_list_size = 0;
1214 archive_set_error(&a->archive, ENOMEM,
1215 "Can't allocate data");
1216 a->archive.state = ARCHIVE_STATE_FATAL;
1217 return (ARCHIVE_FATAL);
1220 for (i = 0; i < t->sparse_count; i++) {
1221 archive_entry_sparse_next(entry, &offset, &length);
1222 t->sparse_list[i].offset = offset;
1223 t->sparse_list[i].length = length;
1226 t->sparse_list[i].offset = 0;
1227 t->sparse_list[i].length = archive_entry_size(entry);
1229 t->sparse_list[i].offset = archive_entry_size(entry);
1230 t->sparse_list[i].length = 0;
1232 t->current_sparse = t->sparse_list;
1234 return (ARCHIVE_OK);
1238 archive_read_disk_set_matching(struct archive *_a, struct archive *_ma,
1239 void (*_excluded_func)(struct archive *, void *, struct archive_entry *),
1242 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1243 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
1244 ARCHIVE_STATE_ANY, "archive_read_disk_set_matching");
1246 a->excluded_cb_func = _excluded_func;
1247 a->excluded_cb_data = _client_data;
1248 return (ARCHIVE_OK);
1252 archive_read_disk_set_metadata_filter_callback(struct archive *_a,
1253 int (*_metadata_filter_func)(struct archive *, void *,
1254 struct archive_entry *), void *_client_data)
1256 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1258 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, ARCHIVE_STATE_ANY,
1259 "archive_read_disk_set_metadata_filter_callback");
1261 a->metadata_filter_func = _metadata_filter_func;
1262 a->metadata_filter_data = _client_data;
1263 return (ARCHIVE_OK);
1267 archive_read_disk_can_descend(struct archive *_a)
1269 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1270 struct tree *t = a->tree;
1272 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
1273 ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
1274 "archive_read_disk_can_descend");
1276 return (t->visit_type == TREE_REGULAR && t->descend);
1280 * Called by the client to mark the directory just returned from
1281 * tree_next() as needing to be visited.
1284 archive_read_disk_descend(struct archive *_a)
1286 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1287 struct tree *t = a->tree;
1289 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
1290 ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
1291 "archive_read_disk_descend");
1293 if (t->visit_type != TREE_REGULAR || !t->descend)
1294 return (ARCHIVE_OK);
1297 * We must not treat the initial specified path as a physical dir,
1298 * because if we do then we will try and ascend out of it by opening
1299 * ".." which is (a) wrong and (b) causes spurious permissions errors
1300 * if ".." is not readable by us. Instead, treat it as if it were a
1301 * symlink. (This uses an extra fd, but it can only happen once at the
1302 * top level of a traverse.) But we can't necessarily assume t->st is
1303 * valid here (though t->lst is), which complicates the logic a
1306 if (tree_current_is_physical_dir(t)) {
1307 tree_push(t, t->basename, t->current_filesystem_id,
1308 t->lst.st_dev, t->lst.st_ino, &t->restore_time);
1309 if (t->stack->parent->parent != NULL)
1310 t->stack->flags |= isDir;
1312 t->stack->flags |= isDirLink;
1313 } else if (tree_current_is_dir(t)) {
1314 tree_push(t, t->basename, t->current_filesystem_id,
1315 t->st.st_dev, t->st.st_ino, &t->restore_time);
1316 t->stack->flags |= isDirLink;
1319 return (ARCHIVE_OK);
1323 archive_read_disk_open(struct archive *_a, const char *pathname)
1325 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1327 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
1328 ARCHIVE_STATE_NEW | ARCHIVE_STATE_CLOSED,
1329 "archive_read_disk_open");
1330 archive_clear_error(&a->archive);
1332 return (_archive_read_disk_open(_a, pathname));
1336 archive_read_disk_open_w(struct archive *_a, const wchar_t *pathname)
1338 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1339 struct archive_string path;
1342 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC,
1343 ARCHIVE_STATE_NEW | ARCHIVE_STATE_CLOSED,
1344 "archive_read_disk_open_w");
1345 archive_clear_error(&a->archive);
1347 /* Make a char string from a wchar_t string. */
1348 archive_string_init(&path);
1349 if (archive_string_append_from_wcs(&path, pathname,
1350 wcslen(pathname)) != 0) {
1351 if (errno == ENOMEM)
1352 archive_set_error(&a->archive, ENOMEM,
1353 "Can't allocate memory");
1355 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1356 "Can't convert a path to a char string");
1357 a->archive.state = ARCHIVE_STATE_FATAL;
1358 ret = ARCHIVE_FATAL;
1360 ret = _archive_read_disk_open(_a, path.s);
1362 archive_string_free(&path);
1367 _archive_read_disk_open(struct archive *_a, const char *pathname)
1369 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1371 if (a->tree != NULL)
1372 a->tree = tree_reopen(a->tree, pathname,
1373 a->flags & ARCHIVE_READDISK_RESTORE_ATIME);
1375 a->tree = tree_open(pathname, a->symlink_mode,
1376 a->flags & ARCHIVE_READDISK_RESTORE_ATIME);
1377 if (a->tree == NULL) {
1378 archive_set_error(&a->archive, ENOMEM,
1379 "Can't allocate tar data");
1380 a->archive.state = ARCHIVE_STATE_FATAL;
1381 return (ARCHIVE_FATAL);
1383 a->archive.state = ARCHIVE_STATE_HEADER;
1385 return (ARCHIVE_OK);
1389 * Return a current filesystem ID which is index of the filesystem entry
1390 * you've visited through archive_read_disk.
1393 archive_read_disk_current_filesystem(struct archive *_a)
1395 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1397 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, ARCHIVE_STATE_DATA,
1398 "archive_read_disk_current_filesystem");
1400 return (a->tree->current_filesystem_id);
1404 update_current_filesystem(struct archive_read_disk *a, int64_t dev)
1406 struct tree *t = a->tree;
1409 if (t->current_filesystem != NULL &&
1410 t->current_filesystem->dev == dev)
1411 return (ARCHIVE_OK);
1413 for (i = 0; i < t->max_filesystem_id; i++) {
1414 if (t->filesystem_table[i].dev == dev) {
1415 /* There is the filesystem ID we've already generated. */
1416 t->current_filesystem_id = i;
1417 t->current_filesystem = &(t->filesystem_table[i]);
1418 return (ARCHIVE_OK);
1423 * This is the new filesystem which we have to generate a new ID for.
1425 fid = t->max_filesystem_id++;
1426 if (t->max_filesystem_id > t->allocated_filesystem) {
1430 s = t->max_filesystem_id * 2;
1431 p = realloc(t->filesystem_table,
1432 s * sizeof(*t->filesystem_table));
1434 archive_set_error(&a->archive, ENOMEM,
1435 "Can't allocate tar data");
1436 return (ARCHIVE_FATAL);
1438 t->filesystem_table = (struct filesystem *)p;
1439 t->allocated_filesystem = s;
1441 t->current_filesystem_id = fid;
1442 t->current_filesystem = &(t->filesystem_table[fid]);
1443 t->current_filesystem->dev = dev;
1444 t->current_filesystem->allocation_ptr = NULL;
1445 t->current_filesystem->buff = NULL;
1447 /* Setup the current filesystem properties which depend on
1448 * platform specific. */
1449 return (setup_current_filesystem(a));
1453 * Returns 1 if current filesystem is generated filesystem, 0 if it is not
1454 * or -1 if it is unknown.
1457 archive_read_disk_current_filesystem_is_synthetic(struct archive *_a)
1459 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1461 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, ARCHIVE_STATE_DATA,
1462 "archive_read_disk_current_filesystem");
1464 return (a->tree->current_filesystem->synthetic);
1468 * Returns 1 if current filesystem is remote filesystem, 0 if it is not
1469 * or -1 if it is unknown.
1472 archive_read_disk_current_filesystem_is_remote(struct archive *_a)
1474 struct archive_read_disk *a = (struct archive_read_disk *)_a;
1476 archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, ARCHIVE_STATE_DATA,
1477 "archive_read_disk_current_filesystem");
1479 return (a->tree->current_filesystem->remote);
1482 #if defined(_PC_REC_INCR_XFER_SIZE) && defined(_PC_REC_MAX_XFER_SIZE) &&\
1483 defined(_PC_REC_MIN_XFER_SIZE) && defined(_PC_REC_XFER_ALIGN)
1485 get_xfer_size(struct tree *t, int fd, const char *path)
1487 t->current_filesystem->xfer_align = -1;
1490 t->current_filesystem->incr_xfer_size =
1491 fpathconf(fd, _PC_REC_INCR_XFER_SIZE);
1492 t->current_filesystem->max_xfer_size =
1493 fpathconf(fd, _PC_REC_MAX_XFER_SIZE);
1494 t->current_filesystem->min_xfer_size =
1495 fpathconf(fd, _PC_REC_MIN_XFER_SIZE);
1496 t->current_filesystem->xfer_align =
1497 fpathconf(fd, _PC_REC_XFER_ALIGN);
1498 } else if (path != NULL) {
1499 t->current_filesystem->incr_xfer_size =
1500 pathconf(path, _PC_REC_INCR_XFER_SIZE);
1501 t->current_filesystem->max_xfer_size =
1502 pathconf(path, _PC_REC_MAX_XFER_SIZE);
1503 t->current_filesystem->min_xfer_size =
1504 pathconf(path, _PC_REC_MIN_XFER_SIZE);
1505 t->current_filesystem->xfer_align =
1506 pathconf(path, _PC_REC_XFER_ALIGN);
1508 /* At least we need an alignment size. */
1509 if (t->current_filesystem->xfer_align == -1)
1510 return ((errno == EINVAL)?1:-1);
1516 get_xfer_size(struct tree *t, int fd, const char *path)
1518 (void)t; /* UNUSED */
1519 (void)fd; /* UNUSED */
1520 (void)path; /* UNUSED */
1521 return (1);/* Not supported */
1525 #if defined(HAVE_STATFS) && defined(HAVE_FSTATFS) && defined(MNT_LOCAL) \
1526 && !defined(ST_LOCAL)
1529 * Gather current filesystem properties on FreeBSD, OpenBSD and Mac OS X.
1532 setup_current_filesystem(struct archive_read_disk *a)
1534 struct tree *t = a->tree;
1536 #if defined(HAVE_GETVFSBYNAME) && defined(VFCF_SYNTHETIC)
1537 /* TODO: configure should set GETVFSBYNAME_ARG_TYPE to make
1538 * this accurate; some platforms have both and we need the one that's
1539 * used by getvfsbyname()
1541 * Then the following would become:
1542 * #if defined(GETVFSBYNAME_ARG_TYPE)
1543 * GETVFSBYNAME_ARG_TYPE vfc;
1546 # if defined(HAVE_STRUCT_XVFSCONF)
1547 struct xvfsconf vfc;
1553 #if !defined(HAVE_STRUCT_STATFS_F_NAMEMAX)
1557 t->current_filesystem->synthetic = -1;
1558 t->current_filesystem->remote = -1;
1559 if (tree_current_is_symblic_link_target(t)) {
1560 #if defined(HAVE_OPENAT)
1562 * Get file system statistics on any directory
1565 int fd = openat(tree_current_dir_fd(t),
1566 tree_current_access_path(t), O_RDONLY | O_CLOEXEC);
1567 __archive_ensure_cloexec_flag(fd);
1569 archive_set_error(&a->archive, errno,
1571 return (ARCHIVE_FAILED);
1573 r = fstatfs(fd, &sfs);
1575 xr = get_xfer_size(t, fd, NULL);
1578 if (tree_enter_working_dir(t) != 0) {
1579 archive_set_error(&a->archive, errno, "fchdir failed");
1580 return (ARCHIVE_FAILED);
1582 r = statfs(tree_current_access_path(t), &sfs);
1584 xr = get_xfer_size(t, -1, tree_current_access_path(t));
1587 r = fstatfs(tree_current_dir_fd(t), &sfs);
1589 xr = get_xfer_size(t, tree_current_dir_fd(t), NULL);
1591 if (r == -1 || xr == -1) {
1592 archive_set_error(&a->archive, errno, "statfs failed");
1593 return (ARCHIVE_FAILED);
1594 } else if (xr == 1) {
1595 /* pathconf(_PC_REX_*) operations are not supported. */
1596 t->current_filesystem->xfer_align = sfs.f_bsize;
1597 t->current_filesystem->max_xfer_size = -1;
1598 t->current_filesystem->min_xfer_size = sfs.f_iosize;
1599 t->current_filesystem->incr_xfer_size = sfs.f_iosize;
1601 if (sfs.f_flags & MNT_LOCAL)
1602 t->current_filesystem->remote = 0;
1604 t->current_filesystem->remote = 1;
1606 #if defined(HAVE_GETVFSBYNAME) && defined(VFCF_SYNTHETIC)
1607 r = getvfsbyname(sfs.f_fstypename, &vfc);
1609 archive_set_error(&a->archive, errno, "getvfsbyname failed");
1610 return (ARCHIVE_FAILED);
1612 if (vfc.vfc_flags & VFCF_SYNTHETIC)
1613 t->current_filesystem->synthetic = 1;
1615 t->current_filesystem->synthetic = 0;
1618 #if defined(MNT_NOATIME)
1619 if (sfs.f_flags & MNT_NOATIME)
1620 t->current_filesystem->noatime = 1;
1623 t->current_filesystem->noatime = 0;
1625 #if defined(USE_READDIR_R)
1626 /* Set maximum filename length. */
1627 #if defined(HAVE_STRUCT_STATFS_F_NAMEMAX)
1628 t->current_filesystem->name_max = sfs.f_namemax;
1630 # if defined(_PC_NAME_MAX)
1631 /* Mac OS X does not have f_namemax in struct statfs. */
1632 if (tree_current_is_symblic_link_target(t)) {
1633 if (tree_enter_working_dir(t) != 0) {
1634 archive_set_error(&a->archive, errno, "fchdir failed");
1635 return (ARCHIVE_FAILED);
1637 nm = pathconf(tree_current_access_path(t), _PC_NAME_MAX);
1639 nm = fpathconf(tree_current_dir_fd(t), _PC_NAME_MAX);
1644 t->current_filesystem->name_max = NAME_MAX;
1646 t->current_filesystem->name_max = nm;
1648 #endif /* USE_READDIR_R */
1649 return (ARCHIVE_OK);
1652 #elif (defined(HAVE_STATVFS) || defined(HAVE_FSTATVFS)) && defined(ST_LOCAL)
1655 * Gather current filesystem properties on NetBSD
1658 setup_current_filesystem(struct archive_read_disk *a)
1660 struct tree *t = a->tree;
1661 struct statvfs svfs;
1664 t->current_filesystem->synthetic = -1;
1665 if (tree_enter_working_dir(t) != 0) {
1666 archive_set_error(&a->archive, errno, "fchdir failed");
1667 return (ARCHIVE_FAILED);
1669 if (tree_current_is_symblic_link_target(t)) {
1670 r = statvfs(tree_current_access_path(t), &svfs);
1672 xr = get_xfer_size(t, -1, tree_current_access_path(t));
1674 #ifdef HAVE_FSTATVFS
1675 r = fstatvfs(tree_current_dir_fd(t), &svfs);
1677 xr = get_xfer_size(t, tree_current_dir_fd(t), NULL);
1679 r = statvfs(".", &svfs);
1681 xr = get_xfer_size(t, -1, ".");
1684 if (r == -1 || xr == -1) {
1685 t->current_filesystem->remote = -1;
1686 archive_set_error(&a->archive, errno, "statvfs failed");
1687 return (ARCHIVE_FAILED);
1688 } else if (xr == 1) {
1689 /* Usually come here unless NetBSD supports _PC_REC_XFER_ALIGN
1690 * for pathconf() function. */
1691 t->current_filesystem->xfer_align = svfs.f_frsize;
1692 t->current_filesystem->max_xfer_size = -1;
1693 #if defined(HAVE_STRUCT_STATVFS_F_IOSIZE)
1694 t->current_filesystem->min_xfer_size = svfs.f_iosize;
1695 t->current_filesystem->incr_xfer_size = svfs.f_iosize;
1697 t->current_filesystem->min_xfer_size = svfs.f_bsize;
1698 t->current_filesystem->incr_xfer_size = svfs.f_bsize;
1701 if (svfs.f_flag & ST_LOCAL)
1702 t->current_filesystem->remote = 0;
1704 t->current_filesystem->remote = 1;
1706 #if defined(ST_NOATIME)
1707 if (svfs.f_flag & ST_NOATIME)
1708 t->current_filesystem->noatime = 1;
1711 t->current_filesystem->noatime = 0;
1713 /* Set maximum filename length. */
1714 t->current_filesystem->name_max = svfs.f_namemax;
1715 return (ARCHIVE_OK);
1718 #elif defined(HAVE_SYS_STATFS_H) && defined(HAVE_LINUX_MAGIC_H) &&\
1719 defined(HAVE_STATFS) && defined(HAVE_FSTATFS)
1721 * Note: statfs is deprecated since LSB 3.2
1724 #ifndef CIFS_SUPER_MAGIC
1725 #define CIFS_SUPER_MAGIC 0xFF534D42
1727 #ifndef DEVFS_SUPER_MAGIC
1728 #define DEVFS_SUPER_MAGIC 0x1373
1732 * Gather current filesystem properties on Linux
1735 setup_current_filesystem(struct archive_read_disk *a)
1737 struct tree *t = a->tree;
1739 #if defined(HAVE_STATVFS)
1740 struct statvfs svfs;
1742 int r, vr = 0, xr = 0;
1744 if (tree_current_is_symblic_link_target(t)) {
1745 #if defined(HAVE_OPENAT)
1747 * Get file system statistics on any directory
1750 int fd = openat(tree_current_dir_fd(t),
1751 tree_current_access_path(t), O_RDONLY | O_CLOEXEC);
1752 __archive_ensure_cloexec_flag(fd);
1754 archive_set_error(&a->archive, errno,
1756 return (ARCHIVE_FAILED);
1758 #if defined(HAVE_FSTATVFS)
1759 vr = fstatvfs(fd, &svfs);/* for f_flag, mount flags */
1761 r = fstatfs(fd, &sfs);
1763 xr = get_xfer_size(t, fd, NULL);
1766 if (tree_enter_working_dir(t) != 0) {
1767 archive_set_error(&a->archive, errno, "fchdir failed");
1768 return (ARCHIVE_FAILED);
1770 #if defined(HAVE_STATVFS)
1771 vr = statvfs(tree_current_access_path(t), &svfs);
1773 r = statfs(tree_current_access_path(t), &sfs);
1775 xr = get_xfer_size(t, -1, tree_current_access_path(t));
1779 #if defined(HAVE_FSTATVFS)
1780 vr = fstatvfs(tree_current_dir_fd(t), &svfs);
1782 r = fstatfs(tree_current_dir_fd(t), &sfs);
1784 xr = get_xfer_size(t, tree_current_dir_fd(t), NULL);
1786 if (tree_enter_working_dir(t) != 0) {
1787 archive_set_error(&a->archive, errno, "fchdir failed");
1788 return (ARCHIVE_FAILED);
1790 #if defined(HAVE_STATVFS)
1791 vr = statvfs(".", &svfs);
1793 r = statfs(".", &sfs);
1795 xr = get_xfer_size(t, -1, ".");
1798 if (r == -1 || xr == -1 || vr == -1) {
1799 t->current_filesystem->synthetic = -1;
1800 t->current_filesystem->remote = -1;
1801 archive_set_error(&a->archive, errno, "statfs failed");
1802 return (ARCHIVE_FAILED);
1803 } else if (xr == 1) {
1804 /* pathconf(_PC_REX_*) operations are not supported. */
1805 #if defined(HAVE_STATVFS)
1806 t->current_filesystem->xfer_align = svfs.f_frsize;
1807 t->current_filesystem->max_xfer_size = -1;
1808 t->current_filesystem->min_xfer_size = svfs.f_bsize;
1809 t->current_filesystem->incr_xfer_size = svfs.f_bsize;
1811 t->current_filesystem->xfer_align = sfs.f_frsize;
1812 t->current_filesystem->max_xfer_size = -1;
1813 t->current_filesystem->min_xfer_size = sfs.f_bsize;
1814 t->current_filesystem->incr_xfer_size = sfs.f_bsize;
1817 switch (sfs.f_type) {
1818 case AFS_SUPER_MAGIC:
1819 case CIFS_SUPER_MAGIC:
1820 case CODA_SUPER_MAGIC:
1821 case NCP_SUPER_MAGIC:/* NetWare */
1822 case NFS_SUPER_MAGIC:
1823 case SMB_SUPER_MAGIC:
1824 t->current_filesystem->remote = 1;
1825 t->current_filesystem->synthetic = 0;
1827 case DEVFS_SUPER_MAGIC:
1828 case PROC_SUPER_MAGIC:
1829 case USBDEVICE_SUPER_MAGIC:
1830 t->current_filesystem->remote = 0;
1831 t->current_filesystem->synthetic = 1;
1834 t->current_filesystem->remote = 0;
1835 t->current_filesystem->synthetic = 0;
1839 #if defined(ST_NOATIME)
1840 #if defined(HAVE_STATVFS)
1841 if (svfs.f_flag & ST_NOATIME)
1843 if (sfs.f_flags & ST_NOATIME)
1845 t->current_filesystem->noatime = 1;
1848 t->current_filesystem->noatime = 0;
1850 #if defined(USE_READDIR_R)
1851 /* Set maximum filename length. */
1852 t->current_filesystem->name_max = sfs.f_namelen;
1854 return (ARCHIVE_OK);
1857 #elif defined(HAVE_SYS_STATVFS_H) &&\
1858 (defined(HAVE_STATVFS) || defined(HAVE_FSTATVFS))
1861 * Gather current filesystem properties on other posix platform.
1864 setup_current_filesystem(struct archive_read_disk *a)
1866 struct tree *t = a->tree;
1867 struct statvfs svfs;
1870 t->current_filesystem->synthetic = -1;/* Not supported */
1871 t->current_filesystem->remote = -1;/* Not supported */
1872 if (tree_current_is_symblic_link_target(t)) {
1873 #if defined(HAVE_OPENAT)
1875 * Get file system statistics on any directory
1878 int fd = openat(tree_current_dir_fd(t),
1879 tree_current_access_path(t), O_RDONLY | O_CLOEXEC);
1880 __archive_ensure_cloexec_flag(fd);
1882 archive_set_error(&a->archive, errno,
1884 return (ARCHIVE_FAILED);
1886 r = fstatvfs(fd, &svfs);
1888 xr = get_xfer_size(t, fd, NULL);
1891 if (tree_enter_working_dir(t) != 0) {
1892 archive_set_error(&a->archive, errno, "fchdir failed");
1893 return (ARCHIVE_FAILED);
1895 r = statvfs(tree_current_access_path(t), &svfs);
1897 xr = get_xfer_size(t, -1, tree_current_access_path(t));
1900 #ifdef HAVE_FSTATVFS
1901 r = fstatvfs(tree_current_dir_fd(t), &svfs);
1903 xr = get_xfer_size(t, tree_current_dir_fd(t), NULL);
1905 if (tree_enter_working_dir(t) != 0) {
1906 archive_set_error(&a->archive, errno, "fchdir failed");
1907 return (ARCHIVE_FAILED);
1909 r = statvfs(".", &svfs);
1911 xr = get_xfer_size(t, -1, ".");
1914 if (r == -1 || xr == -1) {
1915 t->current_filesystem->synthetic = -1;
1916 t->current_filesystem->remote = -1;
1917 archive_set_error(&a->archive, errno, "statvfs failed");
1918 return (ARCHIVE_FAILED);
1919 } else if (xr == 1) {
1920 /* pathconf(_PC_REX_*) operations are not supported. */
1921 t->current_filesystem->xfer_align = svfs.f_frsize;
1922 t->current_filesystem->max_xfer_size = -1;
1923 t->current_filesystem->min_xfer_size = svfs.f_bsize;
1924 t->current_filesystem->incr_xfer_size = svfs.f_bsize;
1927 #if defined(ST_NOATIME)
1928 if (svfs.f_flag & ST_NOATIME)
1929 t->current_filesystem->noatime = 1;
1932 t->current_filesystem->noatime = 0;
1934 #if defined(USE_READDIR_R)
1935 /* Set maximum filename length. */
1936 t->current_filesystem->name_max = svfs.f_namemax;
1938 return (ARCHIVE_OK);
1944 * Generic: Gather current filesystem properties.
1945 * TODO: Is this generic function really needed?
1948 setup_current_filesystem(struct archive_read_disk *a)
1950 struct tree *t = a->tree;
1951 #if defined(_PC_NAME_MAX) && defined(USE_READDIR_R)
1954 t->current_filesystem->synthetic = -1;/* Not supported */
1955 t->current_filesystem->remote = -1;/* Not supported */
1956 t->current_filesystem->noatime = 0;
1957 (void)get_xfer_size(t, -1, ".");/* Dummy call to avoid build error. */
1958 t->current_filesystem->xfer_align = -1;/* Unknown */
1959 t->current_filesystem->max_xfer_size = -1;
1960 t->current_filesystem->min_xfer_size = -1;
1961 t->current_filesystem->incr_xfer_size = -1;
1963 #if defined(USE_READDIR_R)
1964 /* Set maximum filename length. */
1965 # if defined(_PC_NAME_MAX)
1966 if (tree_current_is_symblic_link_target(t)) {
1967 if (tree_enter_working_dir(t) != 0) {
1968 archive_set_error(&a->archive, errno, "fchdir failed");
1969 return (ARCHIVE_FAILED);
1971 nm = pathconf(tree_current_access_path(t), _PC_NAME_MAX);
1973 nm = fpathconf(tree_current_dir_fd(t), _PC_NAME_MAX);
1975 # endif /* _PC_NAME_MAX */
1977 * Some systems (HP-UX or others?) incorrectly defined
1978 * NAME_MAX macro to be a smaller value.
1980 # if defined(NAME_MAX) && NAME_MAX >= 255
1981 t->current_filesystem->name_max = NAME_MAX;
1983 /* No way to get a trusted value of maximum filename
1985 t->current_filesystem->name_max = PATH_MAX;
1986 # endif /* NAME_MAX */
1987 # if defined(_PC_NAME_MAX)
1989 t->current_filesystem->name_max = nm;
1990 # endif /* _PC_NAME_MAX */
1991 #endif /* USE_READDIR_R */
1992 return (ARCHIVE_OK);
1998 close_and_restore_time(int fd, struct tree *t, struct restore_time *rt)
2001 (void)t; /* UNUSED */
2002 (void)rt; /* UNUSED */
2005 #if defined(HAVE_FUTIMENS) && !defined(__CYGWIN__)
2006 struct timespec timespecs[2];
2008 struct timeval times[2];
2010 if ((t->flags & needsRestoreTimes) == 0 || rt->noatime) {
2017 #if defined(HAVE_FUTIMENS) && !defined(__CYGWIN__)
2018 if (rt->mtime == (time_t)-1) {
2019 timespecs[1].tv_sec = 0;
2020 timespecs[1].tv_nsec = UTIME_OMIT;
2022 timespecs[1].tv_sec = rt->mtime;
2023 timespecs[1].tv_nsec = rt->mtime_nsec;
2026 if (rt->atime == (time_t)-1) {
2027 timespecs[0].tv_sec = 0;
2028 timespecs[0].tv_nsec = UTIME_OMIT;
2030 timespecs[0].tv_sec = rt->atime;
2031 timespecs[0].tv_nsec = rt->atime_nsec;
2033 /* futimens() is defined in POSIX.1-2008. */
2034 if (futimens(fd, timespecs) == 0)
2038 times[1].tv_sec = rt->mtime;
2039 times[1].tv_usec = rt->mtime_nsec / 1000;
2041 times[0].tv_sec = rt->atime;
2042 times[0].tv_usec = rt->atime_nsec / 1000;
2044 #if !defined(HAVE_FUTIMENS) && defined(HAVE_FUTIMES) && !defined(__CYGWIN__)
2045 if (futimes(fd, times) == 0)
2049 #if defined(HAVE_FUTIMESAT)
2050 if (futimesat(tree_current_dir_fd(t), rt->name, times) == 0)
2054 if (lutimes(rt->name, times) != 0)
2056 if (AE_IFLNK != rt->filetype && utimes(rt->name, times) != 0)
2064 open_on_current_dir(struct tree *t, const char *path, int flags)
2067 return (openat(tree_current_dir_fd(t), path, flags));
2069 if (tree_enter_working_dir(t) != 0)
2071 return (open(path, flags));
2079 #ifdef F_DUPFD_CLOEXEC
2080 static volatile int can_dupfd_cloexec = 1;
2082 if (can_dupfd_cloexec) {
2083 new_fd = fcntl(fd, F_DUPFD_CLOEXEC, 0);
2086 /* Linux 2.6.18 - 2.6.23 declare F_DUPFD_CLOEXEC,
2087 * but it cannot be used. So we have to try dup(). */
2088 /* We won't try F_DUPFD_CLOEXEC. */
2089 can_dupfd_cloexec = 0;
2091 #endif /* F_DUPFD_CLOEXEC */
2093 __archive_ensure_cloexec_flag(new_fd);
2098 * Add a directory path to the current stack.
2101 tree_push(struct tree *t, const char *path, int filesystem_id,
2102 int64_t dev, int64_t ino, struct restore_time *rt)
2104 struct tree_entry *te;
2106 te = calloc(1, sizeof(*te));
2107 te->next = t->stack;
2108 te->parent = t->current;
2110 te->depth = te->parent->depth + 1;
2112 archive_string_init(&te->name);
2113 te->symlink_parent_fd = -1;
2114 archive_strcpy(&te->name, path);
2115 te->flags = needsDescent | needsOpen | needsAscent;
2116 te->filesystem_id = filesystem_id;
2119 te->dirname_length = t->dirname_length;
2120 te->restore_time.name = te->name.s;
2122 te->restore_time.mtime = rt->mtime;
2123 te->restore_time.mtime_nsec = rt->mtime_nsec;
2124 te->restore_time.atime = rt->atime;
2125 te->restore_time.atime_nsec = rt->atime_nsec;
2126 te->restore_time.filetype = rt->filetype;
2127 te->restore_time.noatime = rt->noatime;
2132 * Append a name to the current dir path.
2135 tree_append(struct tree *t, const char *name, size_t name_length)
2139 t->path.s[t->dirname_length] = '\0';
2140 t->path.length = t->dirname_length;
2141 /* Strip trailing '/' from name, unless entire name is "/". */
2142 while (name_length > 1 && name[name_length - 1] == '/')
2145 /* Resize pathname buffer as needed. */
2146 size_needed = name_length + t->dirname_length + 2;
2147 archive_string_ensure(&t->path, size_needed);
2148 /* Add a separating '/' if it's needed. */
2149 if (t->dirname_length > 0 && t->path.s[archive_strlen(&t->path)-1] != '/')
2150 archive_strappend_char(&t->path, '/');
2151 t->basename = t->path.s + archive_strlen(&t->path);
2152 archive_strncat(&t->path, name, name_length);
2153 t->restore_time.name = t->basename;
2157 * Open a directory tree for traversal.
2159 static struct tree *
2160 tree_open(const char *path, int symlink_mode, int restore_time)
2164 if ((t = calloc(1, sizeof(*t))) == NULL)
2166 archive_string_init(&t->path);
2167 archive_string_ensure(&t->path, 31);
2168 t->initial_symlink_mode = symlink_mode;
2169 return (tree_reopen(t, path, restore_time));
2172 static struct tree *
2173 tree_reopen(struct tree *t, const char *path, int restore_time)
2177 const int o_flag = O_PATH;
2178 #elif defined(O_SEARCH)
2180 const int o_flag = O_SEARCH;
2181 #elif defined(__FreeBSD__) && defined(O_EXEC)
2183 const int o_flag = O_EXEC;
2186 t->flags = (restore_time != 0)?needsRestoreTimes:0;
2187 t->flags |= onInitialDir;
2190 t->dirname_length = 0;
2194 t->d = INVALID_DIR_HANDLE;
2195 t->symlink_mode = t->initial_symlink_mode;
2196 archive_string_empty(&t->path);
2199 t->entry_remaining_bytes = 0;
2200 t->initial_filesystem_id = -1;
2202 /* First item is set up a lot like a symlink traversal. */
2203 tree_push(t, path, 0, 0, 0, NULL);
2204 t->stack->flags = needsFirstVisit;
2205 t->maxOpenCount = t->openCount = 1;
2206 t->initial_dir_fd = open(".", O_RDONLY | O_CLOEXEC);
2207 #if defined(O_PATH) || defined(O_SEARCH) || \
2208 (defined(__FreeBSD__) && defined(O_EXEC))
2210 * Most likely reason to fail opening "." is that it's not readable,
2211 * so try again for execute. The consequences of not opening this are
2212 * unhelpful and unnecessary errors later.
2214 if (t->initial_dir_fd < 0)
2215 t->initial_dir_fd = open(".", o_flag | O_CLOEXEC);
2217 __archive_ensure_cloexec_flag(t->initial_dir_fd);
2218 t->working_dir_fd = tree_dup(t->initial_dir_fd);
2223 tree_descent(struct tree *t)
2225 int flag, new_fd, r = 0;
2227 t->dirname_length = archive_strlen(&t->path);
2228 flag = O_RDONLY | O_CLOEXEC;
2229 #if defined(O_DIRECTORY)
2230 flag |= O_DIRECTORY;
2232 new_fd = open_on_current_dir(t, t->stack->name.s, flag);
2233 __archive_ensure_cloexec_flag(new_fd);
2235 t->tree_errno = errno;
2239 /* If it is a link, set up fd for the ascent. */
2240 if (t->stack->flags & isDirLink) {
2241 t->stack->symlink_parent_fd = t->working_dir_fd;
2243 if (t->openCount > t->maxOpenCount)
2244 t->maxOpenCount = t->openCount;
2246 close(t->working_dir_fd);
2247 /* Renew the current working directory. */
2248 t->working_dir_fd = new_fd;
2249 t->flags &= ~onWorkingDir;
2255 * We've finished a directory; ascend back to the parent.
2258 tree_ascend(struct tree *t)
2260 struct tree_entry *te;
2261 int new_fd, r = 0, prev_dir_fd;
2264 prev_dir_fd = t->working_dir_fd;
2265 if (te->flags & isDirLink)
2266 new_fd = te->symlink_parent_fd;
2268 new_fd = open_on_current_dir(t, "..", O_RDONLY | O_CLOEXEC);
2269 __archive_ensure_cloexec_flag(new_fd);
2272 t->tree_errno = errno;
2273 r = TREE_ERROR_FATAL;
2275 /* Renew the current working directory. */
2276 t->working_dir_fd = new_fd;
2277 t->flags &= ~onWorkingDir;
2278 /* Current directory has been changed, we should
2279 * close an fd of previous working directory. */
2280 close_and_restore_time(prev_dir_fd, t, &te->restore_time);
2281 if (te->flags & isDirLink) {
2283 te->symlink_parent_fd = -1;
2291 * Return to the initial directory where tree_open() was performed.
2294 tree_enter_initial_dir(struct tree *t)
2298 if ((t->flags & onInitialDir) == 0) {
2299 r = fchdir(t->initial_dir_fd);
2301 t->flags &= ~onWorkingDir;
2302 t->flags |= onInitialDir;
2309 * Restore working directory of directory traversals.
2312 tree_enter_working_dir(struct tree *t)
2317 * Change the current directory if really needed.
2318 * Sometimes this is unneeded when we did not do
2321 if (t->depth > 0 && (t->flags & onWorkingDir) == 0) {
2322 r = fchdir(t->working_dir_fd);
2324 t->flags &= ~onInitialDir;
2325 t->flags |= onWorkingDir;
2332 tree_current_dir_fd(struct tree *t)
2334 return (t->working_dir_fd);
2338 * Pop the working stack.
2341 tree_pop(struct tree *t)
2343 struct tree_entry *te;
2345 t->path.s[t->dirname_length] = '\0';
2346 t->path.length = t->dirname_length;
2347 if (t->stack == t->current && t->current != NULL)
2348 t->current = t->current->parent;
2350 t->stack = te->next;
2351 t->dirname_length = te->dirname_length;
2352 t->basename = t->path.s + t->dirname_length;
2353 while (t->basename[0] == '/')
2355 archive_string_free(&te->name);
2360 * Get the next item in the tree traversal.
2363 tree_next(struct tree *t)
2367 while (t->stack != NULL) {
2368 /* If there's an open dir, get the next entry from there. */
2369 if (t->d != INVALID_DIR_HANDLE) {
2370 r = tree_dir_next_posix(t);
2376 if (t->stack->flags & needsFirstVisit) {
2377 /* Top stack item needs a regular visit. */
2378 t->current = t->stack;
2379 tree_append(t, t->stack->name.s,
2380 archive_strlen(&(t->stack->name)));
2381 /* t->dirname_length = t->path_length; */
2383 t->stack->flags &= ~needsFirstVisit;
2384 return (t->visit_type = TREE_REGULAR);
2385 } else if (t->stack->flags & needsDescent) {
2386 /* Top stack item is dir to descend into. */
2387 t->current = t->stack;
2388 tree_append(t, t->stack->name.s,
2389 archive_strlen(&(t->stack->name)));
2390 t->stack->flags &= ~needsDescent;
2391 r = tree_descent(t);
2396 t->visit_type = TREE_POSTDESCENT;
2397 return (t->visit_type);
2398 } else if (t->stack->flags & needsOpen) {
2399 t->stack->flags &= ~needsOpen;
2400 r = tree_dir_next_posix(t);
2404 } else if (t->stack->flags & needsAscent) {
2405 /* Top stack item is dir and we're done with it. */
2408 t->visit_type = r != 0 ? r : TREE_POSTASCENT;
2409 return (t->visit_type);
2411 /* Top item on stack is dead. */
2413 t->flags &= ~hasLstat;
2414 t->flags &= ~hasStat;
2417 return (t->visit_type = 0);
2421 tree_dir_next_posix(struct tree *t)
2428 #if defined(USE_READDIR_R)
2432 #if defined(HAVE_FDOPENDIR)
2433 t->d = fdopendir(tree_dup(t->working_dir_fd));
2434 #else /* HAVE_FDOPENDIR */
2435 if (tree_enter_working_dir(t) == 0) {
2436 t->d = opendir(".");
2437 #if HAVE_DIRFD || defined(dirfd)
2438 __archive_ensure_cloexec_flag(dirfd(t->d));
2441 #endif /* HAVE_FDOPENDIR */
2443 r = tree_ascend(t); /* Undo "chdir" */
2445 t->tree_errno = errno;
2446 t->visit_type = r != 0 ? r : TREE_ERROR_DIR;
2447 return (t->visit_type);
2449 #if defined(USE_READDIR_R)
2450 dirent_size = offsetof(struct dirent, d_name) +
2451 t->filesystem_table[t->current->filesystem_id].name_max + 1;
2452 if (t->dirent == NULL || t->dirent_allocated < dirent_size) {
2454 t->dirent = malloc(dirent_size);
2455 if (t->dirent == NULL) {
2457 t->d = INVALID_DIR_HANDLE;
2458 (void)tree_ascend(t);
2460 t->tree_errno = ENOMEM;
2461 t->visit_type = TREE_ERROR_DIR;
2462 return (t->visit_type);
2464 t->dirent_allocated = dirent_size;
2466 #endif /* USE_READDIR_R */
2470 #if defined(USE_READDIR_R)
2471 r = readdir_r(t->d, t->dirent, &t->de);
2473 /* Note: According to the man page, return value 9 indicates
2474 * that the readdir_r was not successful and the error code
2475 * is set to the global errno variable. And then if the end
2476 * of directory entries was reached, the return value is 9
2477 * and the third parameter is set to NULL and errno is
2482 if (r != 0 || t->de == NULL) {
2484 t->de = readdir(t->d);
2485 if (t->de == NULL) {
2489 t->d = INVALID_DIR_HANDLE;
2492 t->visit_type = TREE_ERROR_DIR;
2493 return (t->visit_type);
2497 name = t->de->d_name;
2498 namelen = D_NAMELEN(t->de);
2499 t->flags &= ~hasLstat;
2500 t->flags &= ~hasStat;
2501 if (name[0] == '.' && name[1] == '\0')
2503 if (name[0] == '.' && name[1] == '.' && name[2] == '\0')
2505 tree_append(t, name, namelen);
2506 return (t->visit_type = TREE_REGULAR);
2512 * Get the stat() data for the entry just returned from tree_next().
2514 static const struct stat *
2515 tree_current_stat(struct tree *t)
2517 if (!(t->flags & hasStat)) {
2519 if (fstatat(tree_current_dir_fd(t),
2520 tree_current_access_path(t), &t->st, 0) != 0)
2522 if (tree_enter_working_dir(t) != 0)
2524 if (la_stat(tree_current_access_path(t), &t->st) != 0)
2527 t->flags |= hasStat;
2533 * Get the lstat() data for the entry just returned from tree_next().
2535 static const struct stat *
2536 tree_current_lstat(struct tree *t)
2538 if (!(t->flags & hasLstat)) {
2540 if (fstatat(tree_current_dir_fd(t),
2541 tree_current_access_path(t), &t->lst,
2542 AT_SYMLINK_NOFOLLOW) != 0)
2544 if (tree_enter_working_dir(t) != 0)
2546 if (lstat(tree_current_access_path(t), &t->lst) != 0)
2549 t->flags |= hasLstat;
2555 * Test whether current entry is a dir or link to a dir.
2558 tree_current_is_dir(struct tree *t)
2560 const struct stat *st;
2562 * If we already have lstat() info, then try some
2563 * cheap tests to determine if this is a dir.
2565 if (t->flags & hasLstat) {
2566 /* If lstat() says it's a dir, it must be a dir. */
2567 st = tree_current_lstat(t);
2570 if (S_ISDIR(st->st_mode))
2572 /* Not a dir; might be a link to a dir. */
2573 /* If it's not a link, then it's not a link to a dir. */
2574 if (!S_ISLNK(st->st_mode))
2577 * It's a link, but we don't know what it's a link to,
2578 * so we'll have to use stat().
2582 st = tree_current_stat(t);
2583 /* If we can't stat it, it's not a dir. */
2586 /* Use the definitive test. Hopefully this is cached. */
2587 return (S_ISDIR(st->st_mode));
2591 * Test whether current entry is a physical directory. Usually, we
2592 * already have at least one of stat() or lstat() in memory, so we
2593 * use tricks to try to avoid an extra trip to the disk.
2596 tree_current_is_physical_dir(struct tree *t)
2598 const struct stat *st;
2601 * If stat() says it isn't a dir, then it's not a dir.
2602 * If stat() data is cached, this check is free, so do it first.
2604 if (t->flags & hasStat) {
2605 st = tree_current_stat(t);
2608 if (!S_ISDIR(st->st_mode))
2613 * Either stat() said it was a dir (in which case, we have
2614 * to determine whether it's really a link to a dir) or
2615 * stat() info wasn't available. So we use lstat(), which
2616 * hopefully is already cached.
2619 st = tree_current_lstat(t);
2620 /* If we can't stat it, it's not a dir. */
2623 /* Use the definitive test. Hopefully this is cached. */
2624 return (S_ISDIR(st->st_mode));
2628 * Test whether the same file has been in the tree as its parent.
2631 tree_target_is_same_as_parent(struct tree *t, const struct stat *st)
2633 struct tree_entry *te;
2635 for (te = t->current->parent; te != NULL; te = te->parent) {
2636 if (te->dev == (int64_t)st->st_dev &&
2637 te->ino == (int64_t)st->st_ino)
2644 * Test whether the current file is symbolic link target and
2645 * on the other filesystem.
2648 tree_current_is_symblic_link_target(struct tree *t)
2650 static const struct stat *lst, *st;
2652 lst = tree_current_lstat(t);
2653 st = tree_current_stat(t);
2654 return (st != NULL && lst != NULL &&
2655 (int64_t)st->st_dev == t->current_filesystem->dev &&
2656 st->st_dev != lst->st_dev);
2660 * Return the access path for the entry just returned from tree_next().
2663 tree_current_access_path(struct tree *t)
2665 return (t->basename);
2669 * Return the full path for the entry just returned from tree_next().
2672 tree_current_path(struct tree *t)
2678 * Terminate the traversal.
2681 tree_close(struct tree *t)
2686 if (t->entry_fd >= 0) {
2687 close_and_restore_time(t->entry_fd, t, &t->restore_time);
2690 /* Close the handle of readdir(). */
2691 if (t->d != INVALID_DIR_HANDLE) {
2693 t->d = INVALID_DIR_HANDLE;
2695 /* Release anything remaining in the stack. */
2696 while (t->stack != NULL) {
2697 if (t->stack->flags & isDirLink)
2698 close(t->stack->symlink_parent_fd);
2701 if (t->working_dir_fd >= 0) {
2702 close(t->working_dir_fd);
2703 t->working_dir_fd = -1;
2705 if (t->initial_dir_fd >= 0) {
2706 close(t->initial_dir_fd);
2707 t->initial_dir_fd = -1;
2712 * Release any resources.
2715 tree_free(struct tree *t)
2721 archive_string_free(&t->path);
2722 #if defined(USE_READDIR_R)
2725 free(t->sparse_list);
2726 for (i = 0; i < t->max_filesystem_id; i++)
2727 free(t->filesystem_table[i].allocation_ptr);
2728 free(t->filesystem_table);