4 * This file implements mounting of WIM files using FUSE, which stands for
5 * Filesystem in Userspace. FUSE allows a filesystem to be implemented in a
6 * userspace process by implementing the filesystem primitives--- read(),
7 * write(), readdir(), etc.
11 * Copyright (C) 2012, 2013 Eric Biggers
13 * This file is part of wimlib, a library for working with WIM files.
15 * wimlib is free software; you can redistribute it and/or modify it under the
16 * terms of the GNU General Public License as published by the Free
17 * Software Foundation; either version 3 of the License, or (at your option)
20 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
21 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
22 * A PARTICULAR PURPOSE. See the GNU General Public License for more
25 * You should have received a copy of the GNU General Public License
26 * along with wimlib; if not, see http://www.gnu.org/licenses/.
34 #include "wimlib/error.h"
39 # error "FUSE mount not supported on Win32! Please configure --without-fuse"
42 #include "wimlib/encoding.h"
43 #include "wimlib/file_io.h"
44 #include "wimlib/lookup_table.h"
45 #include "wimlib/metadata.h"
46 #include "wimlib/paths.h"
47 #include "wimlib/reparse.h"
48 #include "wimlib/resource.h"
49 #include "wimlib/swm.h"
50 #include "wimlib/timestamp.h"
51 #include "wimlib/version.h"
52 #include "wimlib/write.h"
53 #include "wimlib/xml.h"
64 #include <sys/types.h>
69 #define FUSE_USE_VERSION 26
73 #include <attr/xattr.h>
76 #define MSG_VERSION_TOO_HIGH -1
77 #define MSG_BREAK_LOOP -2
79 /* File descriptor to a file open on the WIM filesystem. */
81 struct wim_inode *f_inode;
82 struct wim_lookup_table_entry *f_lte;
88 struct wimfs_context {
89 /* The WIMStruct for the mounted WIM. */
92 /* Name of the staging directory for a read-write mount. Whenever a new file is
93 * created, it is done so in the staging directory. Furthermore, whenever a
94 * file in the WIM is modified, it is extracted to the staging directory. If
95 * changes are commited when the WIM is unmounted, the file resources are merged
96 * in from the staging directory when writing the new WIM. */
97 char *staging_dir_name;
98 size_t staging_dir_name_len;
100 /* Flags passed to wimlib_mount(). */
103 /* Default flags to use when looking up a WIM dentry (depends on whether
104 * the Windows interface to alternate data streams is being used or
106 int default_lookup_flags;
108 /* Next inode number to be assigned. Note: I didn't bother with a
109 * bitmap of free inode numbers since this isn't even a "real"
110 * filesystem anyway. */
113 /* List of inodes in the mounted image */
114 struct list_head *image_inode_list;
116 /* Name and message queue descriptors for message queues between the
117 * filesystem daemon process and the unmount process. These are used
118 * when the filesystem is unmounted and the process running
119 * wimlib_unmount_image() (i.e. the `imagex unmount' command) needs to
120 * communicate with the filesystem daemon running fuse_main() (i.e. the
121 * daemon created by the `imagex mount' or `imagex mountrw' commands */
122 char *unmount_to_daemon_mq_name;
123 char *daemon_to_unmount_mq_name;
124 mqd_t unmount_to_daemon_mq;
125 mqd_t daemon_to_unmount_mq;
135 init_wimfs_context(struct wimfs_context *ctx)
137 memset(ctx, 0, sizeof(*ctx));
138 ctx->unmount_to_daemon_mq = (mqd_t)-1;
139 ctx->daemon_to_unmount_mq = (mqd_t)-1;
142 #define WIMFS_CTX(fuse_ctx) ((struct wimfs_context*)(fuse_ctx)->private_data)
144 static inline struct wimfs_context *
145 wimfs_get_context(void)
147 return WIMFS_CTX(fuse_get_context());
150 static inline WIMStruct *
151 wimfs_get_WIMStruct(void)
153 return wimfs_get_context()->wim;
157 wimfs_ctx_readonly(const struct wimfs_context *ctx)
159 return (ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) == 0;
163 get_lookup_flags(const struct wimfs_context *ctx)
165 return ctx->default_lookup_flags;
168 /* Returns nonzero if write permission is requested on the file open flags */
170 flags_writable(int open_flags)
172 return open_flags & (O_RDWR | O_WRONLY);
176 * Allocate a file descriptor for a stream.
178 * @inode: inode containing the stream we're opening
179 * @stream_id: ID of the stream we're opening
180 * @lte: Lookup table entry for the stream (may be NULL)
181 * @fd_ret: Return the allocated file descriptor if successful.
182 * @readonly: True if this is a read-only mount.
184 * Return 0 iff successful or error code if unsuccessful.
187 alloc_wimfs_fd(struct wim_inode *inode,
189 struct wim_lookup_table_entry *lte,
190 struct wimfs_fd **fd_ret,
193 static const u16 fds_per_alloc = 8;
194 static const u16 max_fds = 0xffff;
197 DEBUG("Allocating fd for stream ID %u from inode %#"PRIx64" "
198 "(open = %u, allocated = %u)",
199 stream_id, inode->i_ino, inode->i_num_opened_fds,
200 inode->i_num_allocated_fds);
202 if (inode->i_num_opened_fds == inode->i_num_allocated_fds) {
203 struct wimfs_fd **fds;
206 if (inode->i_num_allocated_fds == max_fds) {
210 num_new_fds = min(fds_per_alloc,
211 max_fds - inode->i_num_allocated_fds);
213 fds = REALLOC(inode->i_fds,
214 (inode->i_num_allocated_fds + num_new_fds) *
215 sizeof(inode->i_fds[0]));
220 memset(&fds[inode->i_num_allocated_fds], 0,
221 num_new_fds * sizeof(fds[0]));
223 inode->i_num_allocated_fds += num_new_fds;
225 for (u16 i = 0; ; i++) {
226 if (!inode->i_fds[i]) {
227 struct wimfs_fd *fd = CALLOC(1, sizeof(*fd));
236 fd->stream_id = stream_id;
238 inode->i_fds[i] = fd;
239 inode->i_num_opened_fds++;
240 if (lte && !readonly)
241 lte->num_opened_fds++;
242 DEBUG("Allocated fd (idx = %u)", fd->idx);
252 inode_put_fd(struct wim_inode *inode, struct wimfs_fd *fd)
254 wimlib_assert(inode != NULL);
255 wimlib_assert(fd->f_inode == inode);
256 wimlib_assert(inode->i_num_opened_fds != 0);
257 wimlib_assert(fd->idx < inode->i_num_allocated_fds);
258 wimlib_assert(inode->i_fds[fd->idx] == fd);
260 inode->i_fds[fd->idx] = NULL;
262 if (--inode->i_num_opened_fds == 0 && inode->i_nlink == 0)
267 lte_put_fd(struct wim_lookup_table_entry *lte, struct wimfs_fd *fd)
269 wimlib_assert(fd->f_lte == lte);
271 if (!lte) /* Empty stream with no lookup table entry */
274 /* Close staging file descriptor if needed. */
276 if (lte->resource_location == RESOURCE_IN_STAGING_FILE
277 && fd->staging_fd != -1)
279 if (close(fd->staging_fd) != 0) {
280 ERROR_WITH_ERRNO("Failed to close staging file");
284 lte_decrement_num_opened_fds(lte);
288 /* Close a file descriptor. */
290 close_wimfs_fd(struct wimfs_fd *fd)
293 DEBUG("Closing fd (ino = %#"PRIx64", opened = %u, allocated = %u)",
294 fd->f_inode->i_ino, fd->f_inode->i_num_opened_fds,
295 fd->f_inode->i_num_allocated_fds);
296 ret = lte_put_fd(fd->f_lte, fd);
300 inode_put_fd(fd->f_inode, fd);
305 fuse_mask_mode(mode_t mode, struct fuse_context *fuse_ctx)
307 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
308 mode &= ~fuse_ctx->umask;
314 * Add a new dentry with a new inode to a WIM image.
316 * Returns 0 on success, or negative error number on failure.
319 create_dentry(struct fuse_context *fuse_ctx, const char *path,
320 mode_t mode, int attributes, struct wim_dentry **dentry_ret)
322 struct wim_dentry *parent;
323 struct wim_dentry *new;
324 const char *basename;
325 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
328 parent = get_parent_dentry(wimfs_ctx->wim, path);
332 if (!dentry_is_directory(parent))
335 basename = path_basename(path);
336 if (get_dentry_child_with_name(parent, basename))
339 ret = new_dentry_with_inode(basename, &new);
343 new->d_inode->i_resolved = 1;
344 new->d_inode->i_ino = wimfs_ctx->next_ino++;
345 new->d_inode->i_attributes = attributes;
347 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
348 if (inode_set_unix_data(new->d_inode,
351 fuse_mask_mode(mode, fuse_ctx),
352 wimfs_ctx->wim->lookup_table,
353 UNIX_DATA_ALL | UNIX_DATA_CREATE))
359 dentry_add_child(parent, new);
360 list_add_tail(&new->d_inode->i_list, wimfs_ctx->image_inode_list);
366 /* Remove a dentry from a mounted WIM image; i.e. remove an alias for the
367 * corresponding inode.
369 * If there are no remaining references to the inode either through dentries or
370 * open file descriptors, the inode is freed. Otherwise, the inode is not
371 * removed, but the dentry is unlinked and freed.
373 * Either way, all lookup table entries referenced by the inode have their
374 * reference count decremented. If a lookup table entry has no open file
375 * descriptors and no references remaining, it is freed, and the corresponding
376 * staging file is unlinked.
379 remove_dentry(struct wim_dentry *dentry,
380 struct wim_lookup_table *lookup_table)
382 struct wim_inode *inode = dentry->d_inode;
383 struct wim_lookup_table_entry *lte;
386 for (i = 0; i <= inode->i_num_ads; i++) {
387 lte = inode_stream_lte_resolved(inode, i);
389 lte_decrement_refcnt(lte, lookup_table);
391 unlink_dentry(dentry);
396 inode_default_unix_mode(const struct wim_inode *inode)
398 if (inode_is_symlink(inode))
399 return S_IFLNK | 0777;
400 else if (inode_is_directory(inode))
401 return S_IFDIR | 0777;
403 return S_IFREG | 0777;
406 /* Transfers file attributes from a struct wim_inode to a `stat' buffer.
408 * The lookup table entry tells us which stream in the inode we are statting.
409 * For a named data stream, everything returned is the same as the unnamed data
410 * stream except possibly the size and block count. */
412 inode_to_stbuf(const struct wim_inode *inode,
413 const struct wim_lookup_table_entry *lte,
416 const struct wimfs_context *ctx = wimfs_get_context();
418 memset(stbuf, 0, sizeof(struct stat));
419 stbuf->st_mode = inode_default_unix_mode(inode);
420 stbuf->st_uid = ctx->default_uid;
421 stbuf->st_gid = ctx->default_gid;
422 if (ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
423 struct wimlib_unix_data unix_data;
424 if (inode_get_unix_data(inode, &unix_data, NULL) == 0) {
425 stbuf->st_uid = unix_data.uid;
426 stbuf->st_gid = unix_data.gid;
427 stbuf->st_mode = unix_data.mode;
430 stbuf->st_ino = (ino_t)inode->i_ino;
431 stbuf->st_nlink = inode->i_nlink;
433 stbuf->st_size = wim_resource_size(lte);
436 #ifdef HAVE_STAT_NANOSECOND_PRECISION
437 stbuf->st_atim = wim_timestamp_to_timespec(inode->i_last_access_time);
438 stbuf->st_mtim = wim_timestamp_to_timespec(inode->i_last_write_time);
439 stbuf->st_ctim = stbuf->st_mtim;
441 stbuf->st_atime = wim_timestamp_to_unix(inode->i_last_access_time);
442 stbuf->st_mtime = wim_timestamp_to_unix(inode->i_last_write_time);
443 stbuf->st_ctime = stbuf->st_mtime;
445 stbuf->st_blocks = (stbuf->st_size + 511) / 512;
450 touch_inode(struct wim_inode *inode)
452 u64 now = get_wim_timestamp();
453 inode->i_last_access_time = now;
454 inode->i_last_write_time = now;
457 /* Creates a new staging file and returns its file descriptor opened for
460 * @name_ret: A location into which the a pointer to the newly allocated name of
461 * the staging file is stored.
463 * @ctx: Context for the WIM filesystem; this provides the name of the
466 * On success, returns the file descriptor for the staging file, opened for
467 * writing. On failure, returns -1 and sets errno.
470 create_staging_file(char **name_ret, struct wimfs_context *ctx)
478 static const size_t STAGING_FILE_NAME_LEN = 20;
480 name_len = ctx->staging_dir_name_len + 1 + STAGING_FILE_NAME_LEN;
481 name = MALLOC(name_len + 1);
489 memcpy(name, ctx->staging_dir_name, ctx->staging_dir_name_len);
490 name[ctx->staging_dir_name_len] = '/';
491 randomize_char_array_with_alnum(name + ctx->staging_dir_name_len + 1,
492 STAGING_FILE_NAME_LEN);
493 name[name_len] = '\0';
496 /* Just in case, verify that the randomly generated name doesn't name an
497 * existing file, and try again if so */
498 } while (stat(name, &stbuf) == 0);
500 if (errno != ENOENT) /* other error?! */
503 /* doesn't exist--- ok */
505 DEBUG("Creating staging file `%s'", name);
507 fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0600);
519 * Extract a WIM resource to the staging directory.
521 * @inode: Inode that contains the stream we are extracting
523 * @stream_id: Identifier for the stream (it stays constant even if the indices
524 * of the stream entries are changed)
526 * @lte: Pointer to pointer to the lookup table entry for the stream we need to
527 * extract, or NULL if there was no lookup table entry present for the stream
529 * @size: Number of bytes of the stream we want to extract (this supports the
530 * wimfs_truncate() function). It may be more than the actual stream length, in
531 * which case the extra space is filled with zeroes.
533 * @ctx: Context for the WIM filesystem.
535 * Returns 0 on success or a negative error code on failure.
538 extract_resource_to_staging_dir(struct wim_inode *inode,
540 struct wim_lookup_table_entry **lte,
542 struct wimfs_context *ctx)
544 char *staging_file_name;
547 struct wim_lookup_table_entry *old_lte, *new_lte;
550 DEBUG("Extracting resource to staging dir: inode %"PRIu64", "
551 "stream id %"PRIu32, inode->i_ino, stream_id);
555 wimlib_assert(old_lte == NULL ||
556 old_lte->resource_location != RESOURCE_IN_STAGING_FILE);
558 /* Create the staging file */
559 fd = create_staging_file(&staging_file_name, ctx);
563 /* Extract the stream to the staging file (possibly truncated) */
565 extract_size = min(wim_resource_size(old_lte), size);
566 ret = extract_wim_resource_to_fd(old_lte, fd, extract_size);
572 /* In the case of truncate() to more than the file length, extend the
573 * file with zeroes by calling ftruncate() on the underlying staging
575 if (ret == 0 && size > extract_size)
576 ret = ftruncate(fd, size);
578 /* Close the staging file descriptor and check for errors. If there's
579 * an error, unlink the staging file. */
580 if (ret != 0 || close(fd) != 0) {
586 goto out_delete_staging_file;
589 /* Now deal with the lookup table entries. We may be able to re-use the
590 * existing entry, but we may have to create a new one instead. */
592 if (old_lte && inode->i_nlink == old_lte->refcnt) {
593 /* The reference count of the existing lookup table entry is the
594 * same as the link count of the inode that contains the stream
595 * we're opening. Therefore, ALL the references to the lookup
596 * table entry correspond to the stream we're trying to extract,
597 * so the lookup table entry can be re-used. */
598 DEBUG("Re-using lookup table entry");
599 lookup_table_unlink(ctx->wim->lookup_table, old_lte);
603 /* There's an existing lookup table entry, but its
604 * reference count is greater than the link count for
605 * the inode containing a stream we're opening.
606 * Therefore, we need to split the lookup table entry.
608 wimlib_assert(old_lte->refcnt > inode->i_nlink);
609 DEBUG("Splitting lookup table entry "
610 "(inode->i_nlink = %u, old_lte->refcnt = %u)",
611 inode->i_nlink, old_lte->refcnt);
614 new_lte = new_lookup_table_entry();
617 goto out_delete_staging_file;
620 /* There may already be open file descriptors to this stream if
621 * it's previously been opened read-only, but just now we're
622 * opening it read-write. Identify those file descriptors and
623 * change their lookup table entry pointers to point to the new
624 * lookup table entry, and open staging file descriptors for
627 * At the same time, we need to count the number of these opened
628 * file descriptors to the new lookup table entry. If there's
629 * an old lookup table entry, this number needs to be subtracted
630 * from the fd's opened to the old entry. */
631 for (u16 i = 0, j = 0; j < inode->i_num_opened_fds; i++) {
632 struct wimfs_fd *fd = inode->i_fds[i];
634 if (fd->stream_id == stream_id) {
635 wimlib_assert(fd->f_lte == old_lte);
636 wimlib_assert(fd->staging_fd == -1);
638 new_lte->num_opened_fds++;
639 fd->staging_fd = open(staging_file_name, O_RDONLY);
640 if (fd->staging_fd == -1) {
642 goto out_revert_fd_changes;
648 DEBUG("%hu fd's were already opened to the file we extracted",
649 new_lte->num_opened_fds);
651 old_lte->num_opened_fds -= new_lte->num_opened_fds;
652 old_lte->refcnt -= inode->i_nlink;
656 new_lte->refcnt = inode->i_nlink;
657 new_lte->resource_location = RESOURCE_IN_STAGING_FILE;
658 new_lte->staging_file_name = staging_file_name;
659 new_lte->resource_entry.original_size = size;
661 lookup_table_insert_unhashed(ctx->wim->lookup_table, new_lte,
663 *retrieve_lte_pointer(new_lte) = new_lte;
666 out_revert_fd_changes:
667 for (u16 i = 0, j = 0; j < new_lte->num_opened_fds; i++) {
668 struct wimfs_fd *fd = inode->i_fds[i];
669 if (fd && fd->stream_id == stream_id && fd->f_lte == new_lte) {
671 if (fd->staging_fd != -1) {
672 close(fd->staging_fd);
678 free_lookup_table_entry(new_lte);
679 out_delete_staging_file:
680 unlink(staging_file_name);
681 FREE(staging_file_name);
686 * Creates a randomly named staging directory and saves its name in the
687 * filesystem context structure.
690 make_staging_dir(struct wimfs_context *ctx, const char *user_prefix)
692 static const size_t random_suffix_len = 10;
693 static const char *common_suffix = ".staging";
694 static const size_t common_suffix_len = 8;
696 char *staging_dir_name = NULL;
697 size_t staging_dir_name_len;
699 const char *wim_basename;
700 char *real_user_prefix = NULL;
704 real_user_prefix = realpath(user_prefix, NULL);
705 if (!real_user_prefix) {
706 ERROR_WITH_ERRNO("Could not resolve `%s'",
708 ret = WIMLIB_ERR_NOTDIR;
711 wim_basename = path_basename(ctx->wim->filename);
712 prefix_len = strlen(real_user_prefix) + 1 + strlen(wim_basename);
714 prefix_len = strlen(ctx->wim->filename);
717 staging_dir_name_len = prefix_len + common_suffix_len + random_suffix_len;
719 staging_dir_name = MALLOC(staging_dir_name_len + 1);
720 if (!staging_dir_name) {
721 ret = WIMLIB_ERR_NOMEM;
725 if (real_user_prefix)
726 sprintf(staging_dir_name, "%s/%s", real_user_prefix, wim_basename);
728 strcpy(staging_dir_name, ctx->wim->filename);
730 strcat(staging_dir_name, common_suffix);
732 randomize_char_array_with_alnum(staging_dir_name + prefix_len + common_suffix_len,
735 staging_dir_name[staging_dir_name_len] = '\0';
737 if (mkdir(staging_dir_name, 0700) != 0) {
738 ERROR_WITH_ERRNO("Failed to create temporary directory `%s'",
740 ret = WIMLIB_ERR_MKDIR;
745 FREE(real_user_prefix);
747 ctx->staging_dir_name = staging_dir_name;
748 ctx->staging_dir_name_len = staging_dir_name_len;
750 FREE(staging_dir_name);
756 remove_file_or_directory(const char *fpath, const struct stat *sb,
757 int typeflag, struct FTW *ftwbuf)
759 if (remove(fpath) == 0)
762 ERROR_WITH_ERRNO("Cannot remove `%s'", fpath);
763 return WIMLIB_ERR_DELETE_STAGING_DIR;
768 * Deletes the staging directory and all the files contained in it.
771 delete_staging_dir(struct wimfs_context *ctx)
774 ret = nftw(ctx->staging_dir_name, remove_file_or_directory,
776 FREE(ctx->staging_dir_name);
777 ctx->staging_dir_name = NULL;
782 inode_close_fds(struct wim_inode *inode)
784 u16 num_opened_fds = inode->i_num_opened_fds;
785 for (u16 i = 0, j = 0; j < num_opened_fds; i++) {
786 struct wimfs_fd *fd = inode->i_fds[i];
788 wimlib_assert(fd->f_inode == inode);
789 int ret = close_wimfs_fd(fd);
798 /* Overwrites the WIM file, with changes saved. */
800 rebuild_wim(struct wimfs_context *ctx, int write_flags,
801 wimlib_progress_func_t progress_func)
804 struct wim_lookup_table_entry *lte, *tmp;
805 WIMStruct *w = ctx->wim;
806 struct wim_image_metadata *imd = wim_get_current_image_metadata(ctx->wim);
808 DEBUG("Closing all staging file descriptors.");
809 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
810 ret = inode_close_fds(lte->back_inode);
815 DEBUG("Freeing entries for zero-length streams");
816 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
817 wimlib_assert(lte->unhashed);
818 if (wim_resource_size(lte) == 0) {
819 struct wim_lookup_table_entry **back_ptr;
820 back_ptr = retrieve_lte_pointer(lte);
822 list_del(<e->unhashed_list);
823 free_lookup_table_entry(lte);
827 xml_update_image_info(w, w->current_image);
828 ret = wimlib_overwrite(w, write_flags, 0, progress_func);
830 ERROR("Failed to commit changes to mounted WIM image");
834 /* Simple function that returns the concatenation of 2 strings. */
836 strcat_dup(const char *s1, const char *s2, size_t max_len)
838 size_t len = strlen(s1) + strlen(s2);
841 char *p = MALLOC(len + 1);
844 snprintf(p, len + 1, "%s%s", s1, s2);
849 set_message_queue_names(struct wimfs_context *ctx, const char *mount_dir)
851 static const char *u2d_prefix = "/wimlib-unmount-to-daemon-mq";
852 static const char *d2u_prefix = "/wimlib-daemon-to-unmount-mq";
857 dir_path = realpath(mount_dir, NULL);
859 ERROR_WITH_ERRNO("Failed to resolve path \"%s\"", mount_dir);
861 return WIMLIB_ERR_NOMEM;
863 return WIMLIB_ERR_NOTDIR;
866 for (p = dir_path; *p; p++)
870 ctx->unmount_to_daemon_mq_name = strcat_dup(u2d_prefix, dir_path,
872 if (!ctx->unmount_to_daemon_mq_name) {
873 ret = WIMLIB_ERR_NOMEM;
874 goto out_free_dir_path;
876 ctx->daemon_to_unmount_mq_name = strcat_dup(d2u_prefix, dir_path,
878 if (!ctx->daemon_to_unmount_mq_name) {
879 ret = WIMLIB_ERR_NOMEM;
880 goto out_free_unmount_to_daemon_mq_name;
884 goto out_free_dir_path;
885 out_free_unmount_to_daemon_mq_name:
886 FREE(ctx->unmount_to_daemon_mq_name);
887 ctx->unmount_to_daemon_mq_name = NULL;
894 free_message_queue_names(struct wimfs_context *ctx)
896 FREE(ctx->unmount_to_daemon_mq_name);
897 FREE(ctx->daemon_to_unmount_mq_name);
898 ctx->unmount_to_daemon_mq_name = NULL;
899 ctx->daemon_to_unmount_mq_name = NULL;
903 * Opens two POSIX message queue: one for sending messages from the unmount
904 * process to the daemon process, and one to go the other way. The names of the
905 * message queues, which must be system-wide unique, are be based on the mount
908 * @daemon specifies whether the calling process is the filesystem daemon or the
912 open_message_queues(struct wimfs_context *ctx, bool daemon)
914 int unmount_to_daemon_mq_flags = O_WRONLY | O_CREAT;
915 int daemon_to_unmount_mq_flags = O_RDONLY | O_CREAT;
921 swap(unmount_to_daemon_mq_flags, daemon_to_unmount_mq_flags);
927 orig_umask = umask(0000);
928 DEBUG("Opening message queue \"%s\"", ctx->unmount_to_daemon_mq_name);
929 ctx->unmount_to_daemon_mq = mq_open(ctx->unmount_to_daemon_mq_name,
930 unmount_to_daemon_mq_flags, mode, NULL);
932 if (ctx->unmount_to_daemon_mq == (mqd_t)-1) {
933 ERROR_WITH_ERRNO("mq_open()");
934 ret = WIMLIB_ERR_MQUEUE;
938 DEBUG("Opening message queue \"%s\"", ctx->daemon_to_unmount_mq_name);
939 ctx->daemon_to_unmount_mq = mq_open(ctx->daemon_to_unmount_mq_name,
940 daemon_to_unmount_mq_flags, mode, NULL);
942 if (ctx->daemon_to_unmount_mq == (mqd_t)-1) {
943 ERROR_WITH_ERRNO("mq_open()");
944 mq_close(ctx->unmount_to_daemon_mq);
945 mq_unlink(ctx->unmount_to_daemon_mq_name);
946 ctx->unmount_to_daemon_mq = (mqd_t)-1;
947 ret = WIMLIB_ERR_MQUEUE;
956 /* Try to determine the maximum message size of a message queue. The return
957 * value is the maximum message size, or a guess of 8192 bytes if it cannot be
960 mq_get_msgsize(mqd_t mq)
962 static const char *msgsize_max_file = "/proc/sys/fs/mqueue/msgsize_max";
967 if (mq_getattr(mq, &attr) == 0) {
968 msgsize = attr.mq_msgsize;
970 ERROR_WITH_ERRNO("mq_getattr()");
971 ERROR("Attempting to read %s", msgsize_max_file);
972 fp = fopen(msgsize_max_file, "rb");
974 if (fscanf(fp, "%ld", &msgsize) != 1) {
975 ERROR("Assuming message size of 8192");
980 ERROR_WITH_ERRNO("Failed to open the file `%s'",
982 ERROR("Assuming message size of 8192");
990 get_mailbox(mqd_t mq, long needed_msgsize, long *msgsize_ret,
996 msgsize = mq_get_msgsize(mq);
998 if (msgsize < needed_msgsize) {
999 ERROR("Message queue max size must be at least %ld!",
1001 return WIMLIB_ERR_MQUEUE;
1004 mailbox = MALLOC(msgsize);
1006 ERROR("Failed to allocate %ld bytes for mailbox", msgsize);
1007 return WIMLIB_ERR_NOMEM;
1009 *msgsize_ret = msgsize;
1010 *mailbox_ret = mailbox;
1015 unlink_message_queues(struct wimfs_context *ctx)
1017 mq_unlink(ctx->unmount_to_daemon_mq_name);
1018 mq_unlink(ctx->daemon_to_unmount_mq_name);
1021 /* Closes the message queues, which are allocated in static variables */
1023 close_message_queues(struct wimfs_context *ctx)
1025 DEBUG("Closing message queues");
1026 mq_close(ctx->unmount_to_daemon_mq);
1027 ctx->unmount_to_daemon_mq = (mqd_t)(-1);
1028 mq_close(ctx->daemon_to_unmount_mq);
1029 ctx->daemon_to_unmount_mq = (mqd_t)(-1);
1030 unlink_message_queues(ctx);
1034 struct unmount_msg_hdr {
1039 } _packed_attribute;
1041 struct msg_unmount_request {
1042 struct unmount_msg_hdr hdr;
1044 u8 want_progress_messages;
1045 } _packed_attribute;
1047 struct msg_daemon_info {
1048 struct unmount_msg_hdr hdr;
1051 } _packed_attribute;
1053 struct msg_unmount_finished {
1054 struct unmount_msg_hdr hdr;
1056 } _packed_attribute;
1058 struct msg_write_streams_progress {
1059 struct unmount_msg_hdr hdr;
1060 union wimlib_progress_info info;
1061 } _packed_attribute;
1064 MSG_TYPE_UNMOUNT_REQUEST,
1065 MSG_TYPE_DAEMON_INFO,
1066 MSG_TYPE_WRITE_STREAMS_PROGRESS,
1067 MSG_TYPE_UNMOUNT_FINISHED,
1071 struct msg_handler_context_hdr {
1072 int timeout_seconds;
1075 struct unmount_msg_handler_context {
1076 struct msg_handler_context_hdr hdr;
1080 wimlib_progress_func_t progress_func;
1083 struct daemon_msg_handler_context {
1084 struct msg_handler_context_hdr hdr;
1085 struct wimfs_context *wimfs_ctx;
1089 send_unmount_request_msg(mqd_t mq, int unmount_flags, u8 want_progress_messages)
1091 DEBUG("Sending unmount request msg");
1092 struct msg_unmount_request msg = {
1094 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1095 .cur_version = WIMLIB_VERSION_CODE,
1096 .msg_type = MSG_TYPE_UNMOUNT_REQUEST,
1097 .msg_size = sizeof(msg),
1099 .unmount_flags = unmount_flags,
1100 .want_progress_messages = want_progress_messages,
1103 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1104 ERROR_WITH_ERRNO("Failed to communicate with filesystem daemon");
1105 return WIMLIB_ERR_MQUEUE;
1111 send_daemon_info_msg(mqd_t mq, pid_t pid, int mount_flags)
1113 DEBUG("Sending daemon info msg (pid = %d, mount_flags=%x)",
1116 struct msg_daemon_info msg = {
1118 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1119 .cur_version = WIMLIB_VERSION_CODE,
1120 .msg_type = MSG_TYPE_DAEMON_INFO,
1121 .msg_size = sizeof(msg),
1124 .mount_flags = mount_flags,
1126 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1127 ERROR_WITH_ERRNO("Failed to send daemon info to unmount process");
1128 return WIMLIB_ERR_MQUEUE;
1134 send_unmount_finished_msg(mqd_t mq, int status)
1136 DEBUG("Sending unmount finished msg");
1137 struct msg_unmount_finished msg = {
1139 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1140 .cur_version = WIMLIB_VERSION_CODE,
1141 .msg_type = MSG_TYPE_UNMOUNT_FINISHED,
1142 .msg_size = sizeof(msg),
1146 if (mq_send(mq, (void*)&msg, sizeof(msg), 1))
1147 ERROR_WITH_ERRNO("Failed to send status to unmount process");
1151 unmount_progress_func(enum wimlib_progress_msg msg,
1152 const union wimlib_progress_info *info)
1154 if (msg == WIMLIB_PROGRESS_MSG_WRITE_STREAMS) {
1155 struct msg_write_streams_progress msg = {
1157 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1158 .cur_version = WIMLIB_VERSION_CODE,
1159 .msg_type = MSG_TYPE_WRITE_STREAMS_PROGRESS,
1160 .msg_size = sizeof(msg),
1164 if (mq_send(wimfs_get_context()->daemon_to_unmount_mq,
1165 (void*)&msg, sizeof(msg), 1))
1167 ERROR_WITH_ERRNO("Failed to send progress information "
1168 "to unmount process");
1175 msg_unmount_request_handler(const void *_msg, void *_handler_ctx)
1177 const struct msg_unmount_request *msg = _msg;
1178 struct daemon_msg_handler_context *handler_ctx = _handler_ctx;
1179 struct wimfs_context *wimfs_ctx;
1183 wimlib_progress_func_t progress_func;
1185 DEBUG("Handling unmount request msg");
1187 wimfs_ctx = handler_ctx->wimfs_ctx;
1188 if (msg->hdr.msg_size < sizeof(*msg)) {
1189 status = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1193 unmount_flags = msg->unmount_flags;
1194 if (msg->want_progress_messages)
1195 progress_func = unmount_progress_func;
1197 progress_func = NULL;
1199 ret = send_daemon_info_msg(wimfs_ctx->daemon_to_unmount_mq, getpid(),
1200 wimfs_ctx->mount_flags);
1206 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1207 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_COMMIT) {
1208 int write_flags = 0;
1209 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY)
1210 write_flags |= WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
1211 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_REBUILD)
1212 write_flags |= WIMLIB_WRITE_FLAG_REBUILD;
1213 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_RECOMPRESS)
1214 write_flags |= WIMLIB_WRITE_FLAG_RECOMPRESS;
1215 status = rebuild_wim(wimfs_ctx, write_flags,
1219 DEBUG("Read-only mount");
1224 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1225 ret = delete_staging_dir(wimfs_ctx);
1227 ERROR("Failed to delete the staging directory");
1232 wimfs_ctx->status = status;
1233 wimfs_ctx->have_status = true;
1234 return MSG_BREAK_LOOP;
1238 msg_daemon_info_handler(const void *_msg, void *_handler_ctx)
1240 const struct msg_daemon_info *msg = _msg;
1241 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1243 DEBUG("Handling daemon info msg");
1244 if (msg->hdr.msg_size < sizeof(*msg))
1245 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1246 handler_ctx->daemon_pid = msg->daemon_pid;
1247 handler_ctx->mount_flags = msg->mount_flags;
1248 handler_ctx->hdr.timeout_seconds = 1;
1249 DEBUG("pid of daemon is %d; mount flags were %#x",
1250 handler_ctx->daemon_pid,
1251 handler_ctx->mount_flags);
1256 msg_write_streams_progress_handler(const void *_msg, void *_handler_ctx)
1258 const struct msg_write_streams_progress *msg = _msg;
1259 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1261 if (msg->hdr.msg_size < sizeof(*msg))
1262 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1263 if (handler_ctx->progress_func) {
1264 handler_ctx->progress_func(WIMLIB_PROGRESS_MSG_WRITE_STREAMS,
1271 msg_unmount_finished_handler(const void *_msg, void *_handler_ctx)
1273 const struct msg_unmount_finished *msg = _msg;
1274 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1276 DEBUG("Handling unmount finished message");
1277 if (msg->hdr.msg_size < sizeof(*msg))
1278 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1279 handler_ctx->status = msg->status;
1280 DEBUG("status is %d", handler_ctx->status);
1281 return MSG_BREAK_LOOP;
1285 unmount_timed_out_cb(void *_handler_ctx)
1287 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1289 if (handler_ctx->daemon_pid == 0) {
1292 kill(handler_ctx->daemon_pid, 0);
1293 if (errno == ESRCH) {
1296 DEBUG("Filesystem daemon is still alive... "
1297 "Waiting another %d seconds\n",
1298 handler_ctx->hdr.timeout_seconds);
1303 ERROR("The filesystem daemon has crashed! Changes to the "
1304 "WIM may not have been commited.");
1305 return WIMLIB_ERR_FILESYSTEM_DAEMON_CRASHED;
1309 daemon_timed_out_cb(void *_handler_ctx)
1311 ERROR("Timed out waiting for unmount request! "
1312 "Changes to the mounted WIM will not be committed.");
1313 return WIMLIB_ERR_TIMEOUT;
1316 typedef int (*msg_handler_t)(const void *_msg, void *_handler_ctx);
1318 struct msg_handler_callbacks {
1319 int (*timed_out)(void * _handler_ctx);
1320 msg_handler_t msg_handlers[MSG_TYPE_MAX];
1323 static const struct msg_handler_callbacks unmount_msg_handler_callbacks = {
1324 .timed_out = unmount_timed_out_cb,
1326 [MSG_TYPE_DAEMON_INFO] = msg_daemon_info_handler,
1327 [MSG_TYPE_WRITE_STREAMS_PROGRESS] = msg_write_streams_progress_handler,
1328 [MSG_TYPE_UNMOUNT_FINISHED] = msg_unmount_finished_handler,
1332 static const struct msg_handler_callbacks daemon_msg_handler_callbacks = {
1333 .timed_out = daemon_timed_out_cb,
1335 [MSG_TYPE_UNMOUNT_REQUEST] = msg_unmount_request_handler,
1340 receive_message(mqd_t mq,
1341 struct msg_handler_context_hdr *handler_ctx,
1342 const msg_handler_t msg_handlers[],
1343 long mailbox_size, void *mailbox)
1346 struct timespec timeout;
1347 ssize_t bytes_received;
1348 struct unmount_msg_hdr *hdr;
1351 gettimeofday(&now, NULL);
1352 timeout.tv_sec = now.tv_sec + handler_ctx->timeout_seconds;
1353 timeout.tv_nsec = now.tv_usec * 1000;
1355 bytes_received = mq_timedreceive(mq, mailbox,
1356 mailbox_size, NULL, &timeout);
1358 if (bytes_received == -1) {
1359 if (errno == ETIMEDOUT) {
1360 ret = WIMLIB_ERR_TIMEOUT;
1362 ERROR_WITH_ERRNO("mq_timedreceive()");
1363 ret = WIMLIB_ERR_MQUEUE;
1365 } else if (bytes_received < sizeof(*hdr) ||
1366 bytes_received != hdr->msg_size) {
1367 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1368 } else if (WIMLIB_VERSION_CODE < hdr->min_version) {
1369 /*ERROR("Cannot understand the received message. "*/
1370 /*"Please upgrade wimlib to at least v%d.%d.%d",*/
1371 /*WIMLIB_GET_MAJOR_VERSION(hdr->min_version),*/
1372 /*WIMLIB_GET_MINOR_VERSION(hdr->min_version),*/
1373 /*WIMLIB_GET_PATCH_VERSION(hdr->min_version));*/
1374 ret = MSG_VERSION_TOO_HIGH;
1375 } else if (hdr->msg_type >= MSG_TYPE_MAX) {
1376 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1377 } else if (msg_handlers[hdr->msg_type] == NULL) {
1378 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1380 ret = msg_handlers[hdr->msg_type](mailbox, handler_ctx);
1386 message_loop(mqd_t mq,
1387 const struct msg_handler_callbacks *callbacks,
1388 struct msg_handler_context_hdr *handler_ctx)
1390 static const size_t MAX_MSG_SIZE = 512;
1395 DEBUG("Entering message loop");
1397 ret = get_mailbox(mq, MAX_MSG_SIZE, &msgsize, &mailbox);
1401 ret = receive_message(mq, handler_ctx,
1402 callbacks->msg_handlers,
1404 if (ret == 0 || ret == MSG_VERSION_TOO_HIGH) {
1406 } else if (ret == MSG_BREAK_LOOP) {
1409 } else if (ret == WIMLIB_ERR_TIMEOUT) {
1410 if (callbacks->timed_out)
1411 ret = callbacks->timed_out(handler_ctx);
1417 ERROR_WITH_ERRNO("Error communicating with "
1418 "filesystem daemon");
1423 DEBUG("Exiting message loop");
1427 /* Execute `fusermount -u', which is installed setuid root, to unmount the WIM.
1429 * FUSE does not yet implement synchronous unmounts. This means that fusermount
1430 * -u will return before the filesystem daemon returns from wimfs_destroy().
1431 * This is partly what we want, because we need to send a message from this
1432 * process to the filesystem daemon telling whether --commit was specified or
1433 * not. However, after that, the unmount process must wait for the filesystem
1434 * daemon to finish writing the WIM file.
1437 execute_fusermount(const char *dir, bool lazy)
1445 ERROR_WITH_ERRNO("Failed to fork()");
1446 return WIMLIB_ERR_FORK;
1452 *argp++ = "fusermount";
1456 *argp++ = (char*)dir;
1458 execvp("fusermount", argv);
1459 ERROR_WITH_ERRNO("Failed to execute `fusermount'");
1460 exit(WIMLIB_ERR_FUSERMOUNT);
1464 ret = waitpid(pid, &status, 0);
1466 ERROR_WITH_ERRNO("Failed to wait for fusermount process to "
1468 return WIMLIB_ERR_FUSERMOUNT;
1471 if (!WIFEXITED(status)) {
1472 ERROR("'fusermount' did not terminate normally!");
1473 return WIMLIB_ERR_FUSERMOUNT;
1476 status = WEXITSTATUS(status);
1481 if (status != WIMLIB_ERR_FUSERMOUNT)
1482 return WIMLIB_ERR_FUSERMOUNT;
1484 /* Try again, but with the `umount' program. This is required on other
1485 * FUSE implementations such as FreeBSD's that do not have a
1486 * `fusermount' program. */
1487 ERROR("Falling back to 'umount'. Note: you may need to be "
1488 "root for this to work");
1491 ERROR_WITH_ERRNO("Failed to fork()");
1492 return WIMLIB_ERR_FORK;
1501 *argp++ = (char*)dir;
1503 execvp("umount", argv);
1504 ERROR_WITH_ERRNO("Failed to execute `umount'");
1505 exit(WIMLIB_ERR_FUSERMOUNT);
1509 ret = waitpid(pid, &status, 0);
1511 ERROR_WITH_ERRNO("Failed to wait for `umount' process to "
1513 return WIMLIB_ERR_FUSERMOUNT;
1516 ERROR("`umount' did not successfully complete");
1517 return WIMLIB_ERR_FUSERMOUNT;
1523 wimfs_chmod(const char *path, mode_t mask)
1525 struct wim_dentry *dentry;
1526 struct wimfs_context *ctx = wimfs_get_context();
1529 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1532 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1533 &dentry, NULL, NULL);
1537 ret = inode_set_unix_data(dentry->d_inode, ctx->default_uid,
1538 ctx->default_gid, mask,
1539 ctx->wim->lookup_table, UNIX_DATA_MODE);
1540 return ret ? -ENOMEM : 0;
1544 wimfs_chown(const char *path, uid_t uid, gid_t gid)
1546 struct wim_dentry *dentry;
1547 struct wimfs_context *ctx = wimfs_get_context();
1550 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1553 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1554 &dentry, NULL, NULL);
1558 ret = inode_set_unix_data(dentry->d_inode, uid, gid,
1559 inode_default_unix_mode(dentry->d_inode),
1560 ctx->wim->lookup_table,
1561 UNIX_DATA_UID | UNIX_DATA_GID);
1562 return ret ? -ENOMEM : 0;
1565 /* Called when the filesystem is unmounted. */
1567 wimfs_destroy(void *p)
1569 struct wimfs_context *wimfs_ctx = wimfs_get_context();
1570 if (open_message_queues(wimfs_ctx, true) == 0) {
1571 struct daemon_msg_handler_context handler_ctx = {
1573 .timeout_seconds = 5,
1575 .wimfs_ctx = wimfs_ctx,
1577 message_loop(wimfs_ctx->unmount_to_daemon_mq,
1578 &daemon_msg_handler_callbacks,
1584 wimfs_fgetattr(const char *path, struct stat *stbuf,
1585 struct fuse_file_info *fi)
1587 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1588 return inode_to_stbuf(fd->f_inode, fd->f_lte, stbuf);
1592 wimfs_ftruncate(const char *path, off_t size, struct fuse_file_info *fi)
1594 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1595 int ret = ftruncate(fd->staging_fd, size);
1598 touch_inode(fd->f_inode);
1599 fd->f_lte->resource_entry.original_size = size;
1604 * Fills in a `struct stat' that corresponds to a file or directory in the WIM.
1607 wimfs_getattr(const char *path, struct stat *stbuf)
1609 struct wim_dentry *dentry;
1610 struct wim_lookup_table_entry *lte;
1612 struct wimfs_context *ctx = wimfs_get_context();
1614 ret = lookup_resource(ctx->wim, path,
1615 get_lookup_flags(ctx) | LOOKUP_FLAG_DIRECTORY_OK,
1616 &dentry, <e, NULL);
1619 return inode_to_stbuf(dentry->d_inode, lte, stbuf);
1623 /* Read an alternate data stream through the XATTR interface, or get its size */
1625 wimfs_getxattr(const char *path, const char *name, char *value,
1629 struct wim_inode *inode;
1630 struct wim_ads_entry *ads_entry;
1632 struct wim_lookup_table_entry *lte;
1633 struct wimfs_context *ctx = wimfs_get_context();
1635 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1638 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
1642 inode = wim_pathname_to_inode(ctx->wim, path);
1646 ads_entry = inode_get_ads_entry(inode, name, NULL);
1650 lte = ads_entry->lte;
1651 res_size = wim_resource_size(lte);
1656 if (res_size > size)
1659 ret = read_full_resource_into_buf(lte, value);
1667 /* Create a hard link */
1669 wimfs_link(const char *to, const char *from)
1671 struct wim_dentry *from_dentry, *from_dentry_parent;
1672 const char *link_name;
1673 struct wim_inode *inode;
1674 WIMStruct *w = wimfs_get_WIMStruct();
1677 inode = wim_pathname_to_inode(w, to);
1681 if (inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
1682 FILE_ATTRIBUTE_REPARSE_POINT))
1685 from_dentry_parent = get_parent_dentry(w, from);
1686 if (!from_dentry_parent)
1688 if (!dentry_is_directory(from_dentry_parent))
1691 link_name = path_basename(from);
1692 if (get_dentry_child_with_name(from_dentry_parent, link_name))
1695 ret = new_dentry(link_name, &from_dentry);
1700 inode_ref_streams(inode);
1701 from_dentry->d_inode = inode;
1702 inode_add_dentry(from_dentry, inode);
1703 dentry_add_child(from_dentry_parent, from_dentry);
1709 wimfs_listxattr(const char *path, char *list, size_t size)
1712 struct wim_inode *inode;
1713 struct wimfs_context *ctx = wimfs_get_context();
1716 bool size_only = (size == 0);
1718 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1721 /* List alternate data streams, or get the list size */
1723 inode = wim_pathname_to_inode(ctx->wim, path);
1728 for (i = 0; i < inode->i_num_ads; i++) {
1729 char *stream_name_mbs;
1730 size_t stream_name_mbs_nbytes;
1733 ret = utf16le_to_tstr(inode->i_ads_entries[i].stream_name,
1734 inode->i_ads_entries[i].stream_name_nbytes,
1736 &stream_name_mbs_nbytes);
1740 needed_size = stream_name_mbs_nbytes + 6;
1742 if (needed_size > size) {
1743 FREE(stream_name_mbs);
1746 sprintf(p, "user.%s", stream_name_mbs);
1747 size -= needed_size;
1750 FREE(stream_name_mbs);
1757 /* Create a directory in the WIM image. */
1759 wimfs_mkdir(const char *path, mode_t mode)
1761 return create_dentry(fuse_get_context(), path, mode | S_IFDIR,
1762 FILE_ATTRIBUTE_DIRECTORY, NULL);
1765 /* Create a regular file or alternate data stream in the WIM image. */
1767 wimfs_mknod(const char *path, mode_t mode, dev_t rdev)
1769 const char *stream_name;
1770 struct fuse_context *fuse_ctx = fuse_get_context();
1771 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
1776 if ((wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
1777 && (stream_name = path_stream_name(path))) {
1778 /* Make an alternate data stream */
1779 struct wim_ads_entry *new_entry;
1780 struct wim_inode *inode;
1782 char *p = (char*)stream_name - 1;
1783 wimlib_assert(*p == ':');
1786 inode = wim_pathname_to_inode(wimfs_ctx->wim, path);
1789 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)
1791 if (inode_get_ads_entry(inode, stream_name, NULL))
1793 new_entry = inode_add_ads(inode, stream_name);
1798 /* Make a normal file (not an alternate data stream) */
1799 return create_dentry(fuse_ctx, path, mode | S_IFREG,
1800 FILE_ATTRIBUTE_NORMAL, NULL);
1806 wimfs_open(const char *path, struct fuse_file_info *fi)
1808 struct wim_dentry *dentry;
1809 struct wim_lookup_table_entry *lte;
1811 struct wimfs_fd *fd;
1812 struct wim_inode *inode;
1815 struct wimfs_context *ctx = wimfs_get_context();
1816 struct wim_lookup_table_entry **back_ptr;
1818 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
1819 &dentry, <e, &stream_idx);
1823 inode = dentry->d_inode;
1825 if (stream_idx == 0) {
1827 back_ptr = &inode->i_lte;
1829 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
1830 back_ptr = &inode->i_ads_entries[stream_idx - 1].lte;
1833 /* The file resource may be in the staging directory (read-write mounts
1834 * only) or in the WIM. If it's in the staging directory, we need to
1835 * open a native file descriptor for the corresponding file. Otherwise,
1836 * we can read the file resource directly from the WIM file if we are
1837 * opening it read-only, but we need to extract the resource to the
1838 * staging directory if we are opening it writable. */
1840 if (flags_writable(fi->flags) &&
1841 (!lte || lte->resource_location != RESOURCE_IN_STAGING_FILE)) {
1842 u64 size = (lte) ? wim_resource_size(lte) : 0;
1843 ret = extract_resource_to_staging_dir(inode, stream_id,
1850 ret = alloc_wimfs_fd(inode, stream_id, lte, &fd,
1851 wimfs_ctx_readonly(ctx));
1855 if (lte && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
1856 fd->staging_fd = open(lte->staging_file_name, fi->flags);
1857 if (fd->staging_fd == -1) {
1858 int errno_save = errno;
1863 fi->fh = (uintptr_t)fd;
1867 /* Opens a directory. */
1869 wimfs_opendir(const char *path, struct fuse_file_info *fi)
1871 struct wim_inode *inode;
1873 struct wimfs_fd *fd = NULL;
1874 struct wimfs_context *ctx = wimfs_get_context();
1875 WIMStruct *w = ctx->wim;
1877 inode = wim_pathname_to_inode(w, path);
1880 if (!inode_is_directory(inode))
1882 ret = alloc_wimfs_fd(inode, 0, NULL, &fd, wimfs_ctx_readonly(ctx));
1883 fi->fh = (uintptr_t)fd;
1889 * Read data from a file in the WIM or in the staging directory.
1892 wimfs_read(const char *path, char *buf, size_t size,
1893 off_t offset, struct fuse_file_info *fi)
1895 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1906 res_size = wim_resource_size(fd->f_lte);
1910 if (offset > res_size)
1913 size = min(size, res_size - offset);
1917 switch (fd->f_lte->resource_location) {
1918 case RESOURCE_IN_STAGING_FILE:
1919 ret = full_pread(fd->staging_fd, buf, size, offset);
1923 case RESOURCE_IN_WIM:
1924 if (read_partial_wim_resource_into_buf(fd->f_lte, size,
1930 case RESOURCE_IN_ATTACHED_BUFFER:
1931 memcpy(buf, fd->f_lte->attached_buffer + offset, size);
1935 ERROR("Invalid resource location");
1942 struct fill_params {
1944 fuse_fill_dir_t filler;
1948 dentry_fuse_fill(struct wim_dentry *dentry, void *arg)
1950 struct fill_params *fill_params = arg;
1952 char *file_name_mbs;
1953 size_t file_name_mbs_nbytes;
1956 ret = utf16le_to_tstr(dentry->file_name,
1957 dentry->file_name_nbytes,
1959 &file_name_mbs_nbytes);
1963 ret = fill_params->filler(fill_params->buf, file_name_mbs, NULL, 0);
1964 FREE(file_name_mbs);
1968 /* Fills in the entries of the directory specified by @path using the
1969 * FUSE-provided function @filler. */
1971 wimfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
1972 off_t offset, struct fuse_file_info *fi)
1974 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1975 struct wim_inode *inode;
1980 inode = fd->f_inode;
1982 struct fill_params fill_params = {
1987 filler(buf, ".", NULL, 0);
1988 filler(buf, "..", NULL, 0);
1990 return for_dentry_in_rbtree(inode->i_children.rb_node,
1991 dentry_fuse_fill, &fill_params);
1996 wimfs_readlink(const char *path, char *buf, size_t buf_len)
1998 struct wimfs_context *ctx = wimfs_get_context();
1999 struct wim_inode *inode = wim_pathname_to_inode(ctx->wim, path);
2003 if (!inode_is_symlink(inode))
2006 return -ENAMETOOLONG;
2007 ret = wim_inode_readlink(inode, buf, buf_len - 1);
2009 wimlib_assert(ret <= buf_len - 1);
2012 } else if (ret == -ENAMETOOLONG) {
2013 buf[buf_len - 1] = '\0';
2020 wimfs_release(const char *path, struct fuse_file_info *fi)
2022 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2023 return close_wimfs_fd(fd);
2026 /* Close a directory */
2028 wimfs_releasedir(const char *path, struct fuse_file_info *fi)
2030 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2031 return close_wimfs_fd(fd);
2035 /* Remove an alternate data stream through the XATTR interface */
2037 wimfs_removexattr(const char *path, const char *name)
2039 struct wim_inode *inode;
2040 struct wim_ads_entry *ads_entry;
2042 struct wimfs_context *ctx = wimfs_get_context();
2044 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2047 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2051 inode = wim_pathname_to_inode(ctx->wim, path);
2055 ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2058 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2063 /* Renames a file or directory. See rename (3) */
2065 wimfs_rename(const char *from, const char *to)
2067 return rename_wim_path(wimfs_get_WIMStruct(), from, to);
2070 /* Remove a directory */
2072 wimfs_rmdir(const char *path)
2074 struct wim_dentry *dentry;
2075 WIMStruct *w = wimfs_get_WIMStruct();
2077 dentry = get_dentry(w, path);
2081 if (!dentry_is_directory(dentry))
2084 if (dentry_has_children(dentry))
2087 remove_dentry(dentry, w->lookup_table);
2092 /* Write an alternate data stream through the XATTR interface */
2094 wimfs_setxattr(const char *path, const char *name,
2095 const char *value, size_t size, int flags)
2097 struct wim_ads_entry *existing_ads_entry;
2098 struct wim_inode *inode;
2100 struct wimfs_context *ctx = wimfs_get_context();
2103 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2106 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2110 inode = wim_pathname_to_inode(ctx->wim, path);
2114 existing_ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2115 if (existing_ads_entry) {
2116 if (flags & XATTR_CREATE)
2119 if (flags & XATTR_REPLACE)
2123 ret = inode_add_ads_with_data(inode, name, value,
2124 size, ctx->wim->lookup_table);
2126 if (existing_ads_entry)
2127 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2136 wimfs_symlink(const char *to, const char *from)
2138 struct fuse_context *fuse_ctx = fuse_get_context();
2139 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
2140 struct wim_dentry *dentry;
2143 ret = create_dentry(fuse_ctx, from, S_IFLNK | 0777,
2144 FILE_ATTRIBUTE_REPARSE_POINT, &dentry);
2146 dentry->d_inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
2147 ret = wim_inode_set_symlink(dentry->d_inode, to,
2148 wimfs_ctx->wim->lookup_table);
2150 remove_dentry(dentry, wimfs_ctx->wim->lookup_table);
2151 if (ret == WIMLIB_ERR_NOMEM)
2161 /* Reduce the size of a file */
2163 wimfs_truncate(const char *path, off_t size)
2165 struct wim_dentry *dentry;
2166 struct wim_lookup_table_entry *lte;
2170 struct wim_inode *inode;
2171 struct wimfs_context *ctx = wimfs_get_context();
2173 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
2174 &dentry, <e, &stream_idx);
2179 if (lte == NULL && size == 0)
2182 if (lte->resource_location == RESOURCE_IN_STAGING_FILE) {
2183 ret = truncate(lte->staging_file_name, size);
2187 lte->resource_entry.original_size = size;
2189 /* File in WIM. Extract it to the staging directory, but only
2190 * the first @size bytes of it. */
2191 struct wim_lookup_table_entry **back_ptr;
2193 inode = dentry->d_inode;
2194 if (stream_idx == 0) {
2196 back_ptr = &inode->i_lte;
2198 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
2199 back_ptr = &inode->i_ads_entries[stream_idx - 1].lte;
2201 ret = extract_resource_to_staging_dir(inode, stream_id,
2208 /* Unlink a non-directory or alternate data stream */
2210 wimfs_unlink(const char *path)
2212 struct wim_dentry *dentry;
2213 struct wim_lookup_table_entry *lte;
2216 struct wimfs_context *ctx = wimfs_get_context();
2218 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
2219 &dentry, <e, &stream_idx);
2224 if (stream_idx == 0)
2225 remove_dentry(dentry, ctx->wim->lookup_table);
2227 inode_remove_ads(dentry->d_inode, stream_idx - 1,
2228 ctx->wim->lookup_table);
2232 #ifdef HAVE_UTIMENSAT
2234 * Change the timestamp on a file dentry.
2236 * Note that alternate data streams do not have their own timestamps.
2239 wimfs_utimens(const char *path, const struct timespec tv[2])
2241 struct wim_dentry *dentry;
2242 struct wim_inode *inode;
2243 WIMStruct *w = wimfs_get_WIMStruct();
2245 dentry = get_dentry(w, path);
2248 inode = dentry->d_inode;
2250 if (tv[0].tv_nsec != UTIME_OMIT) {
2251 if (tv[0].tv_nsec == UTIME_NOW)
2252 inode->i_last_access_time = get_wim_timestamp();
2254 inode->i_last_access_time = timespec_to_wim_timestamp(tv[0]);
2256 if (tv[1].tv_nsec != UTIME_OMIT) {
2257 if (tv[1].tv_nsec == UTIME_NOW)
2258 inode->i_last_write_time = get_wim_timestamp();
2260 inode->i_last_write_time = timespec_to_wim_timestamp(tv[1]);
2264 #else /* HAVE_UTIMENSAT */
2266 wimfs_utime(const char *path, struct utimbuf *times)
2268 struct wim_dentry *dentry;
2269 struct wim_inode *inode;
2270 WIMStruct *w = wimfs_get_WIMStruct();
2272 dentry = get_dentry(w, path);
2275 inode = dentry->d_inode;
2277 inode->i_last_write_time = unix_timestamp_to_wim(times->modtime);
2278 inode->i_last_access_time = unix_timestamp_to_wim(times->actime);
2281 #endif /* !HAVE_UTIMENSAT */
2283 /* Writes to a file in the WIM filesystem.
2284 * It may be an alternate data stream, but here we don't even notice because we
2285 * just get a lookup table entry. */
2287 wimfs_write(const char *path, const char *buf, size_t size,
2288 off_t offset, struct fuse_file_info *fi)
2290 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2296 wimlib_assert(fd->f_lte != NULL);
2297 wimlib_assert(fd->f_lte->staging_file_name != NULL);
2298 wimlib_assert(fd->staging_fd != -1);
2299 wimlib_assert(fd->f_inode != NULL);
2301 /* Write the data. */
2302 ret = full_pwrite(fd->staging_fd, buf, size, offset);
2306 /* Update file size */
2307 if (offset + size > fd->f_lte->resource_entry.original_size) {
2308 DEBUG("Update file size %"PRIu64 " => %"PRIu64"",
2309 fd->f_lte->resource_entry.original_size,
2311 fd->f_lte->resource_entry.original_size = offset + size;
2314 /* Update timestamps */
2315 touch_inode(fd->f_inode);
2319 static struct fuse_operations wimfs_operations = {
2320 .chmod = wimfs_chmod,
2321 .chown = wimfs_chown,
2322 .destroy = wimfs_destroy,
2323 .fgetattr = wimfs_fgetattr,
2324 .ftruncate = wimfs_ftruncate,
2325 .getattr = wimfs_getattr,
2327 .getxattr = wimfs_getxattr,
2331 .listxattr = wimfs_listxattr,
2333 .mkdir = wimfs_mkdir,
2334 .mknod = wimfs_mknod,
2336 .opendir = wimfs_opendir,
2338 .readdir = wimfs_readdir,
2339 .readlink = wimfs_readlink,
2340 .release = wimfs_release,
2341 .releasedir = wimfs_releasedir,
2343 .removexattr = wimfs_removexattr,
2345 .rename = wimfs_rename,
2346 .rmdir = wimfs_rmdir,
2348 .setxattr = wimfs_setxattr,
2350 .symlink = wimfs_symlink,
2351 .truncate = wimfs_truncate,
2352 .unlink = wimfs_unlink,
2353 #ifdef HAVE_UTIMENSAT
2354 .utimens = wimfs_utimens,
2356 .utime = wimfs_utime,
2358 .write = wimfs_write,
2360 /* wimfs keeps file descriptor structures (struct wimfs_fd), so there is
2361 * no need to have the file path provided on operations such as read()
2362 * where only the file descriptor is needed. */
2363 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2364 .flag_nullpath_ok = 1,
2366 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 9)
2368 .flag_utime_omit_ok = 1,
2373 /* Mounts an image from a WIM file. */
2375 wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
2376 int mount_flags, WIMStruct **additional_swms,
2377 unsigned num_additional_swms,
2378 const char *staging_dir)
2384 struct wim_image_metadata *imd;
2385 struct wimfs_context ctx;
2386 struct wim_inode *inode;
2388 DEBUG("Mount: wim = %p, image = %d, dir = %s, flags = %d, ",
2389 wim, image, dir, mount_flags);
2392 ret = WIMLIB_ERR_INVALID_PARAM;
2396 ret = verify_swm_set(wim, additional_swms, num_additional_swms);
2400 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2401 ret = can_delete_from_wim(wim);
2406 if (num_additional_swms)
2407 merge_lookup_tables(wim, additional_swms, num_additional_swms);
2409 ret = select_wim_image(wim, image);
2411 goto out_restore_lookup_table;
2413 DEBUG("Selected image %d", image);
2415 imd = wim_get_current_image_metadata(wim);
2417 if (imd->refcnt != 1) {
2418 ERROR("Cannot mount image that was just exported with "
2419 "wimlib_export_image()");
2420 ret = WIMLIB_ERR_INVALID_PARAM;
2421 goto out_restore_lookup_table;
2424 if (imd->modified) {
2425 ERROR("Cannot mount image that was added "
2426 "with wimlib_add_image()");
2427 ret = WIMLIB_ERR_INVALID_PARAM;
2428 goto out_restore_lookup_table;
2431 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2432 ret = lock_wim(wim, wim->in_fd);
2434 goto out_restore_lookup_table;
2437 /* Use default stream interface if one was not specified */
2438 if (!(mount_flags & (WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_NONE |
2439 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR |
2440 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)))
2441 mount_flags |= WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR;
2443 DEBUG("Initializing struct wimfs_context");
2444 init_wimfs_context(&ctx);
2446 ctx.mount_flags = mount_flags;
2447 ctx.image_inode_list = &imd->inode_list;
2448 ctx.default_uid = getuid();
2449 ctx.default_gid = getgid();
2450 wimlib_assert(list_empty(&imd->unhashed_streams));
2451 ctx.wim->lookup_table->unhashed_streams = &imd->unhashed_streams;
2452 if (mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
2453 ctx.default_lookup_flags = LOOKUP_FLAG_ADS_OK;
2455 DEBUG("Unlinking message queues in case they already exist");
2456 ret = set_message_queue_names(&ctx, dir);
2459 unlink_message_queues(&ctx);
2461 DEBUG("Preparing arguments to fuse_main()");
2463 dir_copy = STRDUP(dir);
2465 goto out_free_message_queue_names;
2468 argv[argc++] = IMAGEX_PROGNAME;
2469 argv[argc++] = dir_copy;
2471 /* disable multi-threaded operation */
2472 argv[argc++] = "-s";
2474 if (mount_flags & WIMLIB_MOUNT_FLAG_DEBUG)
2475 argv[argc++] = "-d";
2478 * We provide the use_ino option to the FUSE mount because we are going
2479 * to assign inode numbers ourselves. */
2480 char optstring[256] =
2484 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2487 ",default_permissions"
2489 argv[argc++] = "-o";
2490 argv[argc++] = optstring;
2491 if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)) {
2492 /* Read-write mount. Make the staging directory */
2493 ret = make_staging_dir(&ctx, staging_dir);
2495 goto out_free_dir_copy;
2497 /* Read-only mount */
2498 strcat(optstring, ",ro");
2500 if (mount_flags & WIMLIB_MOUNT_FLAG_ALLOW_OTHER)
2501 strcat(optstring, ",allow_other");
2507 DEBUG("FUSE command line (argc = %d): ", argc);
2508 for (i = 0; i < argc; i++) {
2509 fputs(argv[i], stdout);
2517 /* Mark dentry tree as modified if read-write mount. */
2518 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)
2521 /* Resolve the lookup table entries for every inode in the image, and
2522 * assign inode numbers */
2523 DEBUG("Resolving lookup table entries and assigning inode numbers");
2525 image_for_each_inode(inode, imd)
2526 inode->i_ino = ctx.next_ino++;
2527 DEBUG("(next_ino = %"PRIu64")", ctx.next_ino);
2529 DEBUG("Calling fuse_main()");
2531 ret = fuse_main(argc, argv, &wimfs_operations, &ctx);
2533 DEBUG("Returned from fuse_main() (ret = %d)", ret);
2536 ret = WIMLIB_ERR_FUSE;
2538 if (ctx.have_status)
2541 ret = WIMLIB_ERR_TIMEOUT;
2543 if (ctx.daemon_to_unmount_mq != (mqd_t)(-1)) {
2544 send_unmount_finished_msg(ctx.daemon_to_unmount_mq, ret);
2545 close_message_queues(&ctx);
2548 /* Try to delete the staging directory if a deletion wasn't yet
2549 * attempted due to an earlier error */
2550 if (ctx.staging_dir_name)
2551 delete_staging_dir(&ctx);
2555 wim->wim_locked = 0;
2556 out_free_message_queue_names:
2557 free_message_queue_names(&ctx);
2558 out_restore_lookup_table:
2559 if (num_additional_swms)
2560 unmerge_lookup_table(wim);
2566 * Unmounts the WIM file that was previously mounted on @dir by using
2567 * wimlib_mount_image().
2570 wimlib_unmount_image(const char *dir, int unmount_flags,
2571 wimlib_progress_func_t progress_func)
2574 struct wimfs_context wimfs_ctx;
2576 init_wimfs_context(&wimfs_ctx);
2578 ret = set_message_queue_names(&wimfs_ctx, dir);
2582 ret = open_message_queues(&wimfs_ctx, false);
2584 goto out_free_message_queue_names;
2586 ret = send_unmount_request_msg(wimfs_ctx.unmount_to_daemon_mq,
2588 progress_func != NULL);
2590 goto out_close_message_queues;
2592 ret = execute_fusermount(dir, (unmount_flags & WIMLIB_UNMOUNT_FLAG_LAZY) != 0);
2594 goto out_close_message_queues;
2596 struct unmount_msg_handler_context handler_ctx = {
2598 .timeout_seconds = 5,
2601 .progress_func = progress_func,
2604 ret = message_loop(wimfs_ctx.daemon_to_unmount_mq,
2605 &unmount_msg_handler_callbacks,
2608 ret = handler_ctx.status;
2609 out_close_message_queues:
2610 close_message_queues(&wimfs_ctx);
2611 out_free_message_queue_names:
2612 free_message_queue_names(&wimfs_ctx);
2617 #else /* WITH_FUSE */
2621 mount_unsupported_error(void)
2623 #if defined(__WIN32__)
2624 ERROR("Sorry-- Mounting WIM images is not supported on Windows!");
2626 ERROR("wimlib was compiled with --without-fuse, which disables support "
2627 "for mounting WIMs.");
2629 return WIMLIB_ERR_UNSUPPORTED;
2633 wimlib_unmount_image(const tchar *dir, int unmount_flags,
2634 wimlib_progress_func_t progress_func)
2636 return mount_unsupported_error();
2640 wimlib_mount_image(WIMStruct *wim, int image, const tchar *dir,
2641 int mount_flags, WIMStruct **additional_swms,
2642 unsigned num_additional_swms,
2643 const tchar *staging_dir)
2645 return mount_unsupported_error();
2648 #endif /* !WITH_FUSE */