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/.
29 #include "wimlib_internal.h"
34 # error "FUSE mount not supported on Win32! Please configure --without-fuse"
37 #include "buffer_io.h"
38 #include "lookup_table.h"
40 #include "timestamp.h"
52 #include <sys/types.h>
57 #define FUSE_USE_VERSION 26
61 #include <attr/xattr.h>
64 #define MSG_VERSION_TOO_HIGH -1
65 #define MSG_BREAK_LOOP -2
67 /* File descriptor to a file open on the WIM filesystem. */
69 struct wim_inode *f_inode;
70 struct wim_lookup_table_entry *f_lte;
76 struct wimfs_context {
77 /* The WIMStruct for the mounted WIM. */
80 /* Name of the staging directory for a read-write mount. Whenever a new file is
81 * created, it is done so in the staging directory. Furthermore, whenever a
82 * file in the WIM is modified, it is extracted to the staging directory. If
83 * changes are commited when the WIM is unmounted, the file resources are merged
84 * in from the staging directory when writing the new WIM. */
85 char *staging_dir_name;
86 size_t staging_dir_name_len;
88 /* Flags passed to wimlib_mount(). */
91 /* Default flags to use when looking up a WIM dentry (depends on whether
92 * the Windows interface to alternate data streams is being used or
94 int default_lookup_flags;
96 /* Next inode number to be assigned. Note: I didn't bother with a
97 * bitmap of free inode numbers since this isn't even a "real"
98 * filesystem anyway. */
101 /* List of inodes in the mounted image */
102 struct list_head *image_inode_list;
104 /* Name and message queue descriptors for message queues between the
105 * filesystem daemon process and the unmount process. These are used
106 * when the filesystem is unmounted and the process running
107 * wimlib_unmount_image() (i.e. the `imagex unmount' command) needs to
108 * communicate with the filesystem daemon running fuse_main() (i.e. the
109 * daemon created by the `imagex mount' or `imagex mountrw' commands */
110 char *unmount_to_daemon_mq_name;
111 char *daemon_to_unmount_mq_name;
112 mqd_t unmount_to_daemon_mq;
113 mqd_t daemon_to_unmount_mq;
123 init_wimfs_context(struct wimfs_context *ctx)
125 memset(ctx, 0, sizeof(*ctx));
126 ctx->unmount_to_daemon_mq = (mqd_t)-1;
127 ctx->daemon_to_unmount_mq = (mqd_t)-1;
130 #define WIMFS_CTX(fuse_ctx) ((struct wimfs_context*)(fuse_ctx)->private_data)
132 static inline struct wimfs_context *
135 return WIMFS_CTX(fuse_get_context());
138 static inline WIMStruct *
139 wimfs_get_WIMStruct()
141 return wimfs_get_context()->wim;
145 wimfs_ctx_readonly(const struct wimfs_context *ctx)
147 return (ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) == 0;
151 get_lookup_flags(const struct wimfs_context *ctx)
153 return ctx->default_lookup_flags;
156 /* Returns nonzero if write permission is requested on the file open flags */
158 flags_writable(int open_flags)
160 return open_flags & (O_RDWR | O_WRONLY);
164 * Allocate a file descriptor for a stream.
166 * @inode: inode containing the stream we're opening
167 * @stream_id: ID of the stream we're opening
168 * @lte: Lookup table entry for the stream (may be NULL)
169 * @fd_ret: Return the allocated file descriptor if successful.
170 * @readonly: True if this is a read-only mount.
172 * Return 0 iff successful or error code if unsuccessful.
175 alloc_wimfs_fd(struct wim_inode *inode,
177 struct wim_lookup_table_entry *lte,
178 struct wimfs_fd **fd_ret,
181 static const u16 fds_per_alloc = 8;
182 static const u16 max_fds = 0xffff;
185 pthread_mutex_lock(&inode->i_mutex);
187 DEBUG("Allocating fd for stream ID %u from inode %#"PRIx64" "
188 "(open = %u, allocated = %u)",
189 stream_id, inode->i_ino, inode->i_num_opened_fds,
190 inode->i_num_allocated_fds);
192 if (inode->i_num_opened_fds == inode->i_num_allocated_fds) {
193 struct wimfs_fd **fds;
196 if (inode->i_num_allocated_fds == max_fds) {
200 num_new_fds = min(fds_per_alloc,
201 max_fds - inode->i_num_allocated_fds);
203 fds = REALLOC(inode->i_fds,
204 (inode->i_num_allocated_fds + num_new_fds) *
205 sizeof(inode->i_fds[0]));
210 memset(&fds[inode->i_num_allocated_fds], 0,
211 num_new_fds * sizeof(fds[0]));
213 inode->i_num_allocated_fds += num_new_fds;
215 for (u16 i = 0; ; i++) {
216 if (!inode->i_fds[i]) {
217 struct wimfs_fd *fd = CALLOC(1, sizeof(*fd));
226 fd->stream_id = stream_id;
228 inode->i_fds[i] = fd;
229 inode->i_num_opened_fds++;
230 if (lte && !readonly)
231 lte->num_opened_fds++;
232 DEBUG("Allocated fd (idx = %u)", fd->idx);
238 pthread_mutex_unlock(&inode->i_mutex);
243 inode_put_fd(struct wim_inode *inode, struct wimfs_fd *fd)
245 wimlib_assert(inode != NULL);
247 pthread_mutex_lock(&inode->i_mutex);
249 wimlib_assert(fd->f_inode == inode);
250 wimlib_assert(inode->i_num_opened_fds != 0);
251 wimlib_assert(fd->idx < inode->i_num_allocated_fds);
252 wimlib_assert(inode->i_fds[fd->idx] == fd);
254 inode->i_fds[fd->idx] = NULL;
256 if (--inode->i_num_opened_fds == 0 && inode->i_nlink == 0) {
257 pthread_mutex_unlock(&inode->i_mutex);
260 pthread_mutex_unlock(&inode->i_mutex);
265 lte_put_fd(struct wim_lookup_table_entry *lte, struct wimfs_fd *fd)
267 wimlib_assert(fd->f_lte == lte);
269 if (!lte) /* Empty stream with no lookup table entry */
272 /* Close staging file descriptor if needed. */
274 if (lte->resource_location == RESOURCE_IN_STAGING_FILE
275 && fd->staging_fd != -1)
277 if (close(fd->staging_fd) != 0) {
278 ERROR_WITH_ERRNO("Failed to close staging file");
282 lte_decrement_num_opened_fds(lte);
286 /* Close a file descriptor. */
288 close_wimfs_fd(struct wimfs_fd *fd)
291 DEBUG("Closing fd (ino = %#"PRIx64", opened = %u, allocated = %u)",
292 fd->f_inode->i_ino, fd->f_inode->i_num_opened_fds,
293 fd->f_inode->i_num_allocated_fds);
294 ret = lte_put_fd(fd->f_lte, fd);
298 inode_put_fd(fd->f_inode, fd);
303 fuse_mask_mode(mode_t mode, struct fuse_context *fuse_ctx)
305 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
306 mode &= ~fuse_ctx->umask;
312 * Add a new dentry with a new inode to a WIM image.
314 * Returns 0 on success, or negative error number on failure.
317 create_dentry(struct fuse_context *fuse_ctx, const char *path,
318 mode_t mode, int attributes, struct wim_dentry **dentry_ret)
320 struct wim_dentry *parent;
321 struct wim_dentry *new;
322 const char *basename;
323 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
326 parent = get_parent_dentry(wimfs_ctx->wim, path);
330 if (!dentry_is_directory(parent))
333 basename = path_basename(path);
334 if (get_dentry_child_with_name(parent, basename))
337 ret = new_dentry_with_inode(basename, &new);
341 new->d_inode->i_resolved = 1;
342 new->d_inode->i_ino = wimfs_ctx->next_ino++;
343 new->d_inode->i_attributes = attributes;
345 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
346 if (inode_set_unix_data(new->d_inode,
349 fuse_mask_mode(mode, fuse_ctx),
350 wimfs_ctx->wim->lookup_table,
351 UNIX_DATA_ALL | UNIX_DATA_CREATE))
357 dentry_add_child(parent, new);
358 list_add_tail(&new->d_inode->i_list, wimfs_ctx->image_inode_list);
364 /* Remove a dentry from a mounted WIM image; i.e. remove an alias for the
365 * corresponding inode.
367 * If there are no remaining references to the inode either through dentries or
368 * open file descriptors, the inode is freed. Otherwise, the inode is not
369 * removed, but the dentry is unlinked and freed.
371 * Either way, all lookup table entries referenced by the inode have their
372 * reference count decremented. If a lookup table entry has no open file
373 * descriptors and no references remaining, it is freed, and the corresponding
374 * staging file is unlinked.
377 remove_dentry(struct wim_dentry *dentry,
378 struct wim_lookup_table *lookup_table)
380 struct wim_inode *inode = dentry->d_inode;
381 struct wim_lookup_table_entry *lte;
384 for (i = 0; i <= inode->i_num_ads; i++) {
385 lte = inode_stream_lte_resolved(inode, i);
387 lte_decrement_refcnt(lte, lookup_table);
389 unlink_dentry(dentry);
394 inode_default_unix_mode(const struct wim_inode *inode)
396 if (inode_is_symlink(inode))
397 return S_IFLNK | 0777;
398 else if (inode_is_directory(inode))
399 return S_IFDIR | 0777;
401 return S_IFREG | 0777;
404 /* Transfers file attributes from a struct wim_inode to a `stat' buffer.
406 * The lookup table entry tells us which stream in the inode we are statting.
407 * For a named data stream, everything returned is the same as the unnamed data
408 * stream except possibly the size and block count. */
410 inode_to_stbuf(const struct wim_inode *inode,
411 const struct wim_lookup_table_entry *lte,
414 const struct wimfs_context *ctx = wimfs_get_context();
416 memset(stbuf, 0, sizeof(struct stat));
417 stbuf->st_mode = inode_default_unix_mode(inode);
418 stbuf->st_uid = ctx->default_uid;
419 stbuf->st_gid = ctx->default_gid;
420 if (ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
421 struct wimlib_unix_data unix_data;
422 if (inode_get_unix_data(inode, &unix_data, NULL) == 0) {
423 stbuf->st_uid = unix_data.uid;
424 stbuf->st_gid = unix_data.gid;
425 stbuf->st_mode = unix_data.mode;
428 stbuf->st_ino = (ino_t)inode->i_ino;
429 stbuf->st_nlink = inode->i_nlink;
431 stbuf->st_size = wim_resource_size(lte);
434 #ifdef HAVE_STAT_NANOSECOND_PRECISION
435 stbuf->st_atim = wim_timestamp_to_timespec(inode->i_last_access_time);
436 stbuf->st_mtim = wim_timestamp_to_timespec(inode->i_last_write_time);
437 stbuf->st_ctim = stbuf->st_mtim;
439 stbuf->st_atime = wim_timestamp_to_unix(inode->i_last_access_time);
440 stbuf->st_mtime = wim_timestamp_to_unix(inode->i_last_write_time);
441 stbuf->st_ctime = stbuf->st_mtime;
443 stbuf->st_blocks = (stbuf->st_size + 511) / 512;
448 touch_inode(struct wim_inode *inode)
450 u64 now = get_wim_timestamp();
451 inode->i_last_access_time = now;
452 inode->i_last_write_time = now;
455 /* Creates a new staging file and returns its file descriptor opened for
458 * @name_ret: A location into which the a pointer to the newly allocated name of
459 * the staging file is stored.
461 * @ctx: Context for the WIM filesystem; this provides the name of the
464 * On success, returns the file descriptor for the staging file, opened for
465 * writing. On failure, returns -1 and sets errno.
468 create_staging_file(char **name_ret, struct wimfs_context *ctx)
476 static const size_t STAGING_FILE_NAME_LEN = 20;
478 name_len = ctx->staging_dir_name_len + 1 + STAGING_FILE_NAME_LEN;
479 name = MALLOC(name_len + 1);
487 memcpy(name, ctx->staging_dir_name, ctx->staging_dir_name_len);
488 name[ctx->staging_dir_name_len] = '/';
489 randomize_char_array_with_alnum(name + ctx->staging_dir_name_len + 1,
490 STAGING_FILE_NAME_LEN);
491 name[name_len] = '\0';
494 /* Just in case, verify that the randomly generated name doesn't name an
495 * existing file, and try again if so */
496 } while (stat(name, &stbuf) == 0);
498 if (errno != ENOENT) /* other error?! */
501 /* doesn't exist--- ok */
503 DEBUG("Creating staging file `%s'", name);
505 fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0600);
517 * Extract a WIM resource to the staging directory.
519 * @inode: Inode that contains the stream we are extracting
521 * @stream_id: Identifier for the stream (it stays constant even if the indices
522 * of the stream entries are changed)
524 * @lte: Pointer to pointer to the lookup table entry for the stream we need to
525 * extract, or NULL if there was no lookup table entry present for the stream
527 * @size: Number of bytes of the stream we want to extract (this supports the
528 * wimfs_truncate() function). It may be more than the actual stream length, in
529 * which case the extra space is filled with zeroes.
531 * @ctx: Context for the WIM filesystem.
533 * Returns 0 on success or a negative error code on failure.
536 extract_resource_to_staging_dir(struct wim_inode *inode,
538 struct wim_lookup_table_entry **lte,
540 struct wimfs_context *ctx)
542 char *staging_file_name;
545 struct wim_lookup_table_entry *old_lte, *new_lte;
548 DEBUG("Extracting resource to staging dir: inode %"PRIu64", "
549 "stream id %"PRIu32, inode->i_ino, stream_id);
553 wimlib_assert(old_lte == NULL ||
554 old_lte->resource_location != RESOURCE_IN_STAGING_FILE);
556 /* Create the staging file */
557 fd = create_staging_file(&staging_file_name, ctx);
561 /* Extract the stream to the staging file (possibly truncated) */
563 extract_size = min(wim_resource_size(old_lte), size);
564 ret = extract_wim_resource_to_fd(old_lte, fd, extract_size);
570 /* In the case of truncate() to more than the file length, extend the
571 * file with zeroes by calling ftruncate() on the underlying staging
573 if (ret == 0 && size > extract_size)
574 ret = ftruncate(fd, size);
576 /* Close the staging file descriptor and check for errors. If there's
577 * an error, unlink the staging file. */
578 if (ret != 0 || close(fd) != 0) {
584 goto out_delete_staging_file;
587 /* Now deal with the lookup table entries. We may be able to re-use the
588 * existing entry, but we may have to create a new one instead. */
590 if (old_lte && inode->i_nlink == old_lte->refcnt) {
591 /* The reference count of the existing lookup table entry is the
592 * same as the link count of the inode that contains the stream
593 * we're opening. Therefore, ALL the references to the lookup
594 * table entry correspond to the stream we're trying to extract,
595 * so the lookup table entry can be re-used. */
596 DEBUG("Re-using lookup table entry");
597 lookup_table_unlink(ctx->wim->lookup_table, old_lte);
601 /* There's an existing lookup table entry, but its
602 * reference count is greater than the link count for
603 * the inode containing a stream we're opening.
604 * Therefore, we need to split the lookup table entry.
606 wimlib_assert(old_lte->refcnt > inode->i_nlink);
607 DEBUG("Splitting lookup table entry "
608 "(inode->i_nlink = %u, old_lte->refcnt = %u)",
609 inode->i_nlink, old_lte->refcnt);
612 new_lte = new_lookup_table_entry();
615 goto out_delete_staging_file;
618 /* There may already be open file descriptors to this stream if
619 * it's previously been opened read-only, but just now we're
620 * opening it read-write. Identify those file descriptors and
621 * change their lookup table entry pointers to point to the new
622 * lookup table entry, and open staging file descriptors for
625 * At the same time, we need to count the number of these opened
626 * file descriptors to the new lookup table entry. If there's
627 * an old lookup table entry, this number needs to be subtracted
628 * from the fd's opened to the old entry. */
629 for (u16 i = 0, j = 0; j < inode->i_num_opened_fds; i++) {
630 struct wimfs_fd *fd = inode->i_fds[i];
632 if (fd->stream_id == stream_id) {
633 wimlib_assert(fd->f_lte == old_lte);
634 wimlib_assert(fd->staging_fd == -1);
636 new_lte->num_opened_fds++;
637 fd->staging_fd = open(staging_file_name, O_RDONLY);
638 if (fd->staging_fd == -1) {
640 goto out_revert_fd_changes;
646 DEBUG("%hu fd's were already opened to the file we extracted",
647 new_lte->num_opened_fds);
649 old_lte->num_opened_fds -= new_lte->num_opened_fds;
650 old_lte->refcnt -= inode->i_nlink;
654 new_lte->refcnt = inode->i_nlink;
655 new_lte->resource_location = RESOURCE_IN_STAGING_FILE;
656 new_lte->staging_file_name = staging_file_name;
657 new_lte->resource_entry.original_size = size;
659 lookup_table_insert_unhashed(ctx->wim->lookup_table, new_lte,
661 *retrieve_lte_pointer(new_lte) = new_lte;
664 out_revert_fd_changes:
665 for (u16 i = 0, j = 0; j < new_lte->num_opened_fds; i++) {
666 struct wimfs_fd *fd = inode->i_fds[i];
667 if (fd && fd->stream_id == stream_id && fd->f_lte == new_lte) {
669 if (fd->staging_fd != -1) {
670 close(fd->staging_fd);
676 free_lookup_table_entry(new_lte);
677 out_delete_staging_file:
678 unlink(staging_file_name);
679 FREE(staging_file_name);
684 * Creates a randomly named staging directory and saves its name in the
685 * filesystem context structure.
688 make_staging_dir(struct wimfs_context *ctx, const char *user_prefix)
690 static const size_t random_suffix_len = 10;
691 static const char *common_suffix = ".staging";
692 static const size_t common_suffix_len = 8;
694 char *staging_dir_name = NULL;
695 size_t staging_dir_name_len;
697 const char *wim_basename;
698 char *real_user_prefix = NULL;
702 real_user_prefix = realpath(user_prefix, NULL);
703 if (!real_user_prefix) {
704 ERROR_WITH_ERRNO("Could not resolve `%s'",
706 ret = WIMLIB_ERR_NOTDIR;
709 wim_basename = path_basename(ctx->wim->filename);
710 prefix_len = strlen(real_user_prefix) + 1 + strlen(wim_basename);
712 prefix_len = strlen(ctx->wim->filename);
715 staging_dir_name_len = prefix_len + common_suffix_len + random_suffix_len;
717 staging_dir_name = MALLOC(staging_dir_name_len + 1);
718 if (!staging_dir_name) {
719 ret = WIMLIB_ERR_NOMEM;
723 if (real_user_prefix)
724 sprintf(staging_dir_name, "%s/%s", real_user_prefix, wim_basename);
726 strcpy(staging_dir_name, ctx->wim->filename);
728 strcat(staging_dir_name, common_suffix);
730 randomize_char_array_with_alnum(staging_dir_name + prefix_len + common_suffix_len,
733 staging_dir_name[staging_dir_name_len] = '\0';
735 if (mkdir(staging_dir_name, 0700) != 0) {
736 ERROR_WITH_ERRNO("Failed to create temporary directory `%s'",
738 ret = WIMLIB_ERR_MKDIR;
743 FREE(real_user_prefix);
745 ctx->staging_dir_name = staging_dir_name;
746 ctx->staging_dir_name_len = staging_dir_name_len;
748 FREE(staging_dir_name);
754 remove_file_or_directory(const char *fpath, const struct stat *sb,
755 int typeflag, struct FTW *ftwbuf)
757 if (remove(fpath) == 0)
760 ERROR_WITH_ERRNO("Cannot remove `%s'", fpath);
761 return WIMLIB_ERR_DELETE_STAGING_DIR;
766 * Deletes the staging directory and all the files contained in it.
769 delete_staging_dir(struct wimfs_context *ctx)
772 ret = nftw(ctx->staging_dir_name, remove_file_or_directory,
774 FREE(ctx->staging_dir_name);
775 ctx->staging_dir_name = NULL;
780 inode_close_fds(struct wim_inode *inode)
782 u16 num_opened_fds = inode->i_num_opened_fds;
783 for (u16 i = 0, j = 0; j < num_opened_fds; i++) {
784 struct wimfs_fd *fd = inode->i_fds[i];
786 wimlib_assert(fd->f_inode == inode);
787 int ret = close_wimfs_fd(fd);
796 /* Overwrites the WIM file, with changes saved. */
798 rebuild_wim(struct wimfs_context *ctx, int write_flags,
799 wimlib_progress_func_t progress_func)
802 struct wim_lookup_table_entry *lte, *tmp;
803 WIMStruct *w = ctx->wim;
804 struct wim_image_metadata *imd = wim_get_current_image_metadata(ctx->wim);
806 DEBUG("Closing all staging file descriptors.");
807 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
808 ret = inode_close_fds(lte->back_inode);
813 DEBUG("Freeing entries for zero-length streams");
814 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
815 wimlib_assert(lte->unhashed);
816 if (wim_resource_size(lte) == 0) {
817 struct wim_lookup_table_entry **back_ptr;
818 back_ptr = retrieve_lte_pointer(lte);
820 list_del(<e->unhashed_list);
821 free_lookup_table_entry(lte);
825 xml_update_image_info(w, w->current_image);
826 ret = wimlib_overwrite(w, write_flags, 0, progress_func);
828 ERROR("Failed to commit changes to mounted WIM image");
832 /* Simple function that returns the concatenation of 2 strings. */
834 strcat_dup(const char *s1, const char *s2, size_t max_len)
836 size_t len = strlen(s1) + strlen(s2);
839 char *p = MALLOC(len + 1);
842 snprintf(p, len + 1, "%s%s", s1, s2);
847 set_message_queue_names(struct wimfs_context *ctx, const char *mount_dir)
849 static const char *u2d_prefix = "/wimlib-unmount-to-daemon-mq";
850 static const char *d2u_prefix = "/wimlib-daemon-to-unmount-mq";
855 dir_path = realpath(mount_dir, NULL);
857 ERROR_WITH_ERRNO("Failed to resolve path \"%s\"", mount_dir);
859 return WIMLIB_ERR_NOMEM;
861 return WIMLIB_ERR_NOTDIR;
864 for (p = dir_path; *p; p++)
868 ctx->unmount_to_daemon_mq_name = strcat_dup(u2d_prefix, dir_path,
870 if (!ctx->unmount_to_daemon_mq_name) {
871 ret = WIMLIB_ERR_NOMEM;
872 goto out_free_dir_path;
874 ctx->daemon_to_unmount_mq_name = strcat_dup(d2u_prefix, dir_path,
876 if (!ctx->daemon_to_unmount_mq_name) {
877 ret = WIMLIB_ERR_NOMEM;
878 goto out_free_unmount_to_daemon_mq_name;
882 goto out_free_dir_path;
883 out_free_unmount_to_daemon_mq_name:
884 FREE(ctx->unmount_to_daemon_mq_name);
885 ctx->unmount_to_daemon_mq_name = NULL;
892 free_message_queue_names(struct wimfs_context *ctx)
894 FREE(ctx->unmount_to_daemon_mq_name);
895 FREE(ctx->daemon_to_unmount_mq_name);
896 ctx->unmount_to_daemon_mq_name = NULL;
897 ctx->daemon_to_unmount_mq_name = NULL;
901 * Opens two POSIX message queue: one for sending messages from the unmount
902 * process to the daemon process, and one to go the other way. The names of the
903 * message queues, which must be system-wide unique, are be based on the mount
906 * @daemon specifies whether the calling process is the filesystem daemon or the
910 open_message_queues(struct wimfs_context *ctx, bool daemon)
912 int unmount_to_daemon_mq_flags = O_WRONLY | O_CREAT;
913 int daemon_to_unmount_mq_flags = O_RDONLY | O_CREAT;
919 swap(unmount_to_daemon_mq_flags, daemon_to_unmount_mq_flags);
925 orig_umask = umask(0000);
926 DEBUG("Opening message queue \"%s\"", ctx->unmount_to_daemon_mq_name);
927 ctx->unmount_to_daemon_mq = mq_open(ctx->unmount_to_daemon_mq_name,
928 unmount_to_daemon_mq_flags, mode, NULL);
930 if (ctx->unmount_to_daemon_mq == (mqd_t)-1) {
931 ERROR_WITH_ERRNO("mq_open()");
932 ret = WIMLIB_ERR_MQUEUE;
936 DEBUG("Opening message queue \"%s\"", ctx->daemon_to_unmount_mq_name);
937 ctx->daemon_to_unmount_mq = mq_open(ctx->daemon_to_unmount_mq_name,
938 daemon_to_unmount_mq_flags, mode, NULL);
940 if (ctx->daemon_to_unmount_mq == (mqd_t)-1) {
941 ERROR_WITH_ERRNO("mq_open()");
942 mq_close(ctx->unmount_to_daemon_mq);
943 mq_unlink(ctx->unmount_to_daemon_mq_name);
944 ctx->unmount_to_daemon_mq = (mqd_t)-1;
945 ret = WIMLIB_ERR_MQUEUE;
954 /* Try to determine the maximum message size of a message queue. The return
955 * value is the maximum message size, or a guess of 8192 bytes if it cannot be
958 mq_get_msgsize(mqd_t mq)
960 static const char *msgsize_max_file = "/proc/sys/fs/mqueue/msgsize_max";
965 if (mq_getattr(mq, &attr) == 0) {
966 msgsize = attr.mq_msgsize;
968 ERROR_WITH_ERRNO("mq_getattr()");
969 ERROR("Attempting to read %s", msgsize_max_file);
970 fp = fopen(msgsize_max_file, "rb");
972 if (fscanf(fp, "%ld", &msgsize) != 1) {
973 ERROR("Assuming message size of 8192");
978 ERROR_WITH_ERRNO("Failed to open the file `%s'",
980 ERROR("Assuming message size of 8192");
988 get_mailbox(mqd_t mq, long needed_msgsize, long *msgsize_ret,
994 msgsize = mq_get_msgsize(mq);
996 if (msgsize < needed_msgsize) {
997 ERROR("Message queue max size must be at least %ld!",
999 return WIMLIB_ERR_MQUEUE;
1002 mailbox = MALLOC(msgsize);
1004 ERROR("Failed to allocate %ld bytes for mailbox", msgsize);
1005 return WIMLIB_ERR_NOMEM;
1007 *msgsize_ret = msgsize;
1008 *mailbox_ret = mailbox;
1013 unlink_message_queues(struct wimfs_context *ctx)
1015 mq_unlink(ctx->unmount_to_daemon_mq_name);
1016 mq_unlink(ctx->daemon_to_unmount_mq_name);
1019 /* Closes the message queues, which are allocated in static variables */
1021 close_message_queues(struct wimfs_context *ctx)
1023 DEBUG("Closing message queues");
1024 mq_close(ctx->unmount_to_daemon_mq);
1025 ctx->unmount_to_daemon_mq = (mqd_t)(-1);
1026 mq_close(ctx->daemon_to_unmount_mq);
1027 ctx->daemon_to_unmount_mq = (mqd_t)(-1);
1028 unlink_message_queues(ctx);
1032 struct unmount_msg_hdr {
1039 struct msg_unmount_request {
1040 struct unmount_msg_hdr hdr;
1042 u8 want_progress_messages;
1045 struct msg_daemon_info {
1046 struct unmount_msg_hdr hdr;
1051 struct msg_unmount_finished {
1052 struct unmount_msg_hdr hdr;
1056 struct msg_write_streams_progress {
1057 struct unmount_msg_hdr hdr;
1058 union wimlib_progress_info info;
1062 MSG_TYPE_UNMOUNT_REQUEST,
1063 MSG_TYPE_DAEMON_INFO,
1064 MSG_TYPE_WRITE_STREAMS_PROGRESS,
1065 MSG_TYPE_UNMOUNT_FINISHED,
1069 struct msg_handler_context_hdr {
1070 int timeout_seconds;
1073 struct unmount_msg_handler_context {
1074 struct msg_handler_context_hdr hdr;
1078 wimlib_progress_func_t progress_func;
1081 struct daemon_msg_handler_context {
1082 struct msg_handler_context_hdr hdr;
1083 struct wimfs_context *wimfs_ctx;
1087 send_unmount_request_msg(mqd_t mq, int unmount_flags, u8 want_progress_messages)
1089 DEBUG("Sending unmount request msg");
1090 struct msg_unmount_request msg = {
1092 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1093 .cur_version = WIMLIB_VERSION_CODE,
1094 .msg_type = MSG_TYPE_UNMOUNT_REQUEST,
1095 .msg_size = sizeof(msg),
1097 .unmount_flags = unmount_flags,
1098 .want_progress_messages = want_progress_messages,
1101 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1102 ERROR_WITH_ERRNO("Failed to communicate with filesystem daemon");
1103 return WIMLIB_ERR_MQUEUE;
1109 send_daemon_info_msg(mqd_t mq, pid_t pid, int mount_flags)
1111 DEBUG("Sending daemon info msg (pid = %d, mount_flags=%x)",
1114 struct msg_daemon_info msg = {
1116 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1117 .cur_version = WIMLIB_VERSION_CODE,
1118 .msg_type = MSG_TYPE_DAEMON_INFO,
1119 .msg_size = sizeof(msg),
1122 .mount_flags = mount_flags,
1124 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1125 ERROR_WITH_ERRNO("Failed to send daemon info to unmount process");
1126 return WIMLIB_ERR_MQUEUE;
1132 send_unmount_finished_msg(mqd_t mq, int status)
1134 DEBUG("Sending unmount finished msg");
1135 struct msg_unmount_finished msg = {
1137 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1138 .cur_version = WIMLIB_VERSION_CODE,
1139 .msg_type = MSG_TYPE_UNMOUNT_FINISHED,
1140 .msg_size = sizeof(msg),
1144 if (mq_send(mq, (void*)&msg, sizeof(msg), 1))
1145 ERROR_WITH_ERRNO("Failed to send status to unmount process");
1149 unmount_progress_func(enum wimlib_progress_msg msg,
1150 const union wimlib_progress_info *info)
1152 if (msg == WIMLIB_PROGRESS_MSG_WRITE_STREAMS) {
1153 struct msg_write_streams_progress msg = {
1155 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1156 .cur_version = WIMLIB_VERSION_CODE,
1157 .msg_type = MSG_TYPE_WRITE_STREAMS_PROGRESS,
1158 .msg_size = sizeof(msg),
1162 if (mq_send(wimfs_get_context()->daemon_to_unmount_mq,
1163 (void*)&msg, sizeof(msg), 1))
1165 ERROR_WITH_ERRNO("Failed to send progress information "
1166 "to unmount process");
1173 msg_unmount_request_handler(const void *_msg, void *_handler_ctx)
1175 const struct msg_unmount_request *msg = _msg;
1176 struct daemon_msg_handler_context *handler_ctx = _handler_ctx;
1177 struct wimfs_context *wimfs_ctx;
1181 wimlib_progress_func_t progress_func;
1183 DEBUG("Handling unmount request msg");
1185 wimfs_ctx = handler_ctx->wimfs_ctx;
1186 if (msg->hdr.msg_size < sizeof(*msg)) {
1187 status = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1191 unmount_flags = msg->unmount_flags;
1192 if (msg->want_progress_messages)
1193 progress_func = unmount_progress_func;
1195 progress_func = NULL;
1197 ret = send_daemon_info_msg(wimfs_ctx->daemon_to_unmount_mq, getpid(),
1198 wimfs_ctx->mount_flags);
1204 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1205 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_COMMIT) {
1206 int write_flags = 0;
1207 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY)
1208 write_flags |= WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
1209 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_REBUILD)
1210 write_flags |= WIMLIB_WRITE_FLAG_REBUILD;
1211 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_RECOMPRESS)
1212 write_flags |= WIMLIB_WRITE_FLAG_RECOMPRESS;
1213 status = rebuild_wim(wimfs_ctx, write_flags,
1217 DEBUG("Read-only mount");
1222 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1223 ret = delete_staging_dir(wimfs_ctx);
1225 ERROR("Failed to delete the staging directory");
1230 wimfs_ctx->status = status;
1231 wimfs_ctx->have_status = true;
1232 return MSG_BREAK_LOOP;
1236 msg_daemon_info_handler(const void *_msg, void *_handler_ctx)
1238 const struct msg_daemon_info *msg = _msg;
1239 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1241 DEBUG("Handling daemon info msg");
1242 if (msg->hdr.msg_size < sizeof(*msg))
1243 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1244 handler_ctx->daemon_pid = msg->daemon_pid;
1245 handler_ctx->mount_flags = msg->mount_flags;
1246 handler_ctx->hdr.timeout_seconds = 1;
1247 DEBUG("pid of daemon is %d; mount flags were %#x",
1248 handler_ctx->daemon_pid,
1249 handler_ctx->mount_flags);
1254 msg_write_streams_progress_handler(const void *_msg, void *_handler_ctx)
1256 const struct msg_write_streams_progress *msg = _msg;
1257 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1259 if (msg->hdr.msg_size < sizeof(*msg))
1260 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1261 if (handler_ctx->progress_func) {
1262 handler_ctx->progress_func(WIMLIB_PROGRESS_MSG_WRITE_STREAMS,
1269 msg_unmount_finished_handler(const void *_msg, void *_handler_ctx)
1271 const struct msg_unmount_finished *msg = _msg;
1272 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1274 DEBUG("Handling unmount finished message");
1275 if (msg->hdr.msg_size < sizeof(*msg))
1276 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1277 handler_ctx->status = msg->status;
1278 DEBUG("status is %d", handler_ctx->status);
1279 return MSG_BREAK_LOOP;
1283 unmount_timed_out_cb(void *_handler_ctx)
1285 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1287 if (handler_ctx->daemon_pid == 0) {
1290 kill(handler_ctx->daemon_pid, 0);
1291 if (errno == ESRCH) {
1294 DEBUG("Filesystem daemon is still alive... "
1295 "Waiting another %d seconds\n",
1296 handler_ctx->hdr.timeout_seconds);
1301 ERROR("The filesystem daemon has crashed! Changes to the "
1302 "WIM may not have been commited.");
1303 return WIMLIB_ERR_FILESYSTEM_DAEMON_CRASHED;
1307 daemon_timed_out_cb(void *_handler_ctx)
1309 ERROR("Timed out waiting for unmount request! "
1310 "Changes to the mounted WIM will not be committed.");
1311 return WIMLIB_ERR_TIMEOUT;
1314 typedef int (*msg_handler_t)(const void *_msg, void *_handler_ctx);
1316 struct msg_handler_callbacks {
1317 int (*timed_out)(void * _handler_ctx);
1318 msg_handler_t msg_handlers[MSG_TYPE_MAX];
1321 static const struct msg_handler_callbacks unmount_msg_handler_callbacks = {
1322 .timed_out = unmount_timed_out_cb,
1324 [MSG_TYPE_DAEMON_INFO] = msg_daemon_info_handler,
1325 [MSG_TYPE_WRITE_STREAMS_PROGRESS] = msg_write_streams_progress_handler,
1326 [MSG_TYPE_UNMOUNT_FINISHED] = msg_unmount_finished_handler,
1330 static const struct msg_handler_callbacks daemon_msg_handler_callbacks = {
1331 .timed_out = daemon_timed_out_cb,
1333 [MSG_TYPE_UNMOUNT_REQUEST] = msg_unmount_request_handler,
1338 receive_message(mqd_t mq,
1339 struct msg_handler_context_hdr *handler_ctx,
1340 const msg_handler_t msg_handlers[],
1341 long mailbox_size, void *mailbox)
1344 struct timespec timeout;
1345 ssize_t bytes_received;
1346 struct unmount_msg_hdr *hdr;
1349 gettimeofday(&now, NULL);
1350 timeout.tv_sec = now.tv_sec + handler_ctx->timeout_seconds;
1351 timeout.tv_nsec = now.tv_usec * 1000;
1353 bytes_received = mq_timedreceive(mq, mailbox,
1354 mailbox_size, NULL, &timeout);
1356 if (bytes_received == -1) {
1357 if (errno == ETIMEDOUT) {
1358 ret = WIMLIB_ERR_TIMEOUT;
1360 ERROR_WITH_ERRNO("mq_timedreceive()");
1361 ret = WIMLIB_ERR_MQUEUE;
1363 } else if (bytes_received < sizeof(*hdr) ||
1364 bytes_received != hdr->msg_size) {
1365 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1366 } else if (WIMLIB_VERSION_CODE < hdr->min_version) {
1367 /*ERROR("Cannot understand the received message. "*/
1368 /*"Please upgrade wimlib to at least v%d.%d.%d",*/
1369 /*WIMLIB_GET_MAJOR_VERSION(hdr->min_version),*/
1370 /*WIMLIB_GET_MINOR_VERSION(hdr->min_version),*/
1371 /*WIMLIB_GET_PATCH_VERSION(hdr->min_version));*/
1372 ret = MSG_VERSION_TOO_HIGH;
1373 } else if (hdr->msg_type >= MSG_TYPE_MAX) {
1374 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1375 } else if (msg_handlers[hdr->msg_type] == NULL) {
1376 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1378 ret = msg_handlers[hdr->msg_type](mailbox, handler_ctx);
1384 message_loop(mqd_t mq,
1385 const struct msg_handler_callbacks *callbacks,
1386 struct msg_handler_context_hdr *handler_ctx)
1388 static const size_t MAX_MSG_SIZE = 512;
1393 DEBUG("Entering message loop");
1395 ret = get_mailbox(mq, MAX_MSG_SIZE, &msgsize, &mailbox);
1399 ret = receive_message(mq, handler_ctx,
1400 callbacks->msg_handlers,
1402 if (ret == 0 || ret == MSG_VERSION_TOO_HIGH) {
1404 } else if (ret == MSG_BREAK_LOOP) {
1407 } else if (ret == WIMLIB_ERR_TIMEOUT) {
1408 if (callbacks->timed_out)
1409 ret = callbacks->timed_out(handler_ctx);
1415 ERROR_WITH_ERRNO("Error communicating with "
1416 "filesystem daemon");
1421 DEBUG("Exiting message loop");
1425 /* Execute `fusermount -u', which is installed setuid root, to unmount the WIM.
1427 * FUSE does not yet implement synchronous unmounts. This means that fusermount
1428 * -u will return before the filesystem daemon returns from wimfs_destroy().
1429 * This is partly what we want, because we need to send a message from this
1430 * process to the filesystem daemon telling whether --commit was specified or
1431 * not. However, after that, the unmount process must wait for the filesystem
1432 * daemon to finish writing the WIM file.
1435 execute_fusermount(const char *dir)
1443 ERROR_WITH_ERRNO("Failed to fork()");
1444 return WIMLIB_ERR_FORK;
1448 execlp("fusermount", "fusermount", "-u", dir, NULL);
1449 ERROR_WITH_ERRNO("Failed to execute `fusermount'");
1450 exit(WIMLIB_ERR_FUSERMOUNT);
1454 ret = waitpid(pid, &status, 0);
1456 ERROR_WITH_ERRNO("Failed to wait for fusermount process to "
1458 return WIMLIB_ERR_FUSERMOUNT;
1461 if (!WIFEXITED(status)) {
1462 ERROR("'fusermount' did not terminate normally!");
1463 return WIMLIB_ERR_FUSERMOUNT;
1466 status = WEXITSTATUS(status);
1471 if (status != WIMLIB_ERR_FUSERMOUNT)
1472 return WIMLIB_ERR_FUSERMOUNT;
1474 /* Try again, but with the `umount' program. This is required on other
1475 * FUSE implementations such as FreeBSD's that do not have a
1476 * `fusermount' program. */
1477 ERROR("Falling back to 'umount'. Note: you may need to be "
1478 "root for this to work");
1481 ERROR_WITH_ERRNO("Failed to fork()");
1482 return WIMLIB_ERR_FORK;
1486 execlp("umount", "umount", dir, NULL);
1487 ERROR_WITH_ERRNO("Failed to execute `umount'");
1488 exit(WIMLIB_ERR_FUSERMOUNT);
1492 ret = waitpid(pid, &status, 0);
1494 ERROR_WITH_ERRNO("Failed to wait for `umount' process to "
1496 return WIMLIB_ERR_FUSERMOUNT;
1499 ERROR("`umount' did not successfully complete");
1500 return WIMLIB_ERR_FUSERMOUNT;
1506 wimfs_chmod(const char *path, mode_t mask)
1508 struct wim_dentry *dentry;
1509 struct wimfs_context *ctx = wimfs_get_context();
1512 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1515 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1516 &dentry, NULL, NULL);
1520 ret = inode_set_unix_data(dentry->d_inode, ctx->default_uid,
1521 ctx->default_gid, mask,
1522 ctx->wim->lookup_table, UNIX_DATA_MODE);
1523 return ret ? -ENOMEM : 0;
1527 wimfs_chown(const char *path, uid_t uid, gid_t gid)
1529 struct wim_dentry *dentry;
1530 struct wimfs_context *ctx = wimfs_get_context();
1533 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1536 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1537 &dentry, NULL, NULL);
1541 ret = inode_set_unix_data(dentry->d_inode, uid, gid,
1542 inode_default_unix_mode(dentry->d_inode),
1543 ctx->wim->lookup_table,
1544 UNIX_DATA_UID | UNIX_DATA_GID);
1545 return ret ? -ENOMEM : 0;
1548 /* Called when the filesystem is unmounted. */
1550 wimfs_destroy(void *p)
1552 struct wimfs_context *wimfs_ctx = wimfs_get_context();
1553 if (open_message_queues(wimfs_ctx, true) == 0) {
1554 struct daemon_msg_handler_context handler_ctx = {
1556 .timeout_seconds = 5,
1558 .wimfs_ctx = wimfs_ctx,
1560 message_loop(wimfs_ctx->unmount_to_daemon_mq,
1561 &daemon_msg_handler_callbacks,
1567 wimfs_fgetattr(const char *path, struct stat *stbuf,
1568 struct fuse_file_info *fi)
1570 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1571 return inode_to_stbuf(fd->f_inode, fd->f_lte, stbuf);
1575 wimfs_ftruncate(const char *path, off_t size, struct fuse_file_info *fi)
1577 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1578 int ret = ftruncate(fd->staging_fd, size);
1581 touch_inode(fd->f_inode);
1582 fd->f_lte->resource_entry.original_size = size;
1587 * Fills in a `struct stat' that corresponds to a file or directory in the WIM.
1590 wimfs_getattr(const char *path, struct stat *stbuf)
1592 struct wim_dentry *dentry;
1593 struct wim_lookup_table_entry *lte;
1595 struct wimfs_context *ctx = wimfs_get_context();
1597 ret = lookup_resource(ctx->wim, path,
1598 get_lookup_flags(ctx) | LOOKUP_FLAG_DIRECTORY_OK,
1599 &dentry, <e, NULL);
1602 return inode_to_stbuf(dentry->d_inode, lte, stbuf);
1606 /* Read an alternate data stream through the XATTR interface, or get its size */
1608 wimfs_getxattr(const char *path, const char *name, char *value,
1612 struct wim_inode *inode;
1613 struct wim_ads_entry *ads_entry;
1615 struct wim_lookup_table_entry *lte;
1616 struct wimfs_context *ctx = wimfs_get_context();
1618 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1621 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
1625 inode = wim_pathname_to_inode(ctx->wim, path);
1629 ads_entry = inode_get_ads_entry(inode, name, NULL);
1633 lte = ads_entry->lte;
1634 res_size = wim_resource_size(lte);
1639 if (res_size > size)
1642 ret = read_full_resource_into_buf(lte, value);
1650 /* Create a hard link */
1652 wimfs_link(const char *to, const char *from)
1654 struct wim_dentry *from_dentry, *from_dentry_parent;
1655 const char *link_name;
1656 struct wim_inode *inode;
1657 WIMStruct *w = wimfs_get_WIMStruct();
1660 inode = wim_pathname_to_inode(w, to);
1664 if (inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
1665 FILE_ATTRIBUTE_REPARSE_POINT))
1668 from_dentry_parent = get_parent_dentry(w, from);
1669 if (!from_dentry_parent)
1671 if (!dentry_is_directory(from_dentry_parent))
1674 link_name = path_basename(from);
1675 if (get_dentry_child_with_name(from_dentry_parent, link_name))
1678 ret = new_dentry(link_name, &from_dentry);
1683 inode_ref_streams(inode);
1684 from_dentry->d_inode = inode;
1685 inode_add_dentry(from_dentry, inode);
1686 dentry_add_child(from_dentry_parent, from_dentry);
1692 wimfs_listxattr(const char *path, char *list, size_t size)
1695 struct wim_inode *inode;
1696 struct wimfs_context *ctx = wimfs_get_context();
1699 bool size_only = (size == 0);
1701 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1704 /* List alternate data streams, or get the list size */
1706 inode = wim_pathname_to_inode(ctx->wim, path);
1711 for (i = 0; i < inode->i_num_ads; i++) {
1712 char *stream_name_mbs;
1713 size_t stream_name_mbs_nbytes;
1716 ret = utf16le_to_tstr(inode->i_ads_entries[i].stream_name,
1717 inode->i_ads_entries[i].stream_name_nbytes,
1719 &stream_name_mbs_nbytes);
1723 needed_size = stream_name_mbs_nbytes + 6;
1725 if (needed_size > size) {
1726 FREE(stream_name_mbs);
1729 sprintf(p, "user.%s", stream_name_mbs);
1730 size -= needed_size;
1733 FREE(stream_name_mbs);
1740 /* Create a directory in the WIM image. */
1742 wimfs_mkdir(const char *path, mode_t mode)
1744 return create_dentry(fuse_get_context(), path, mode | S_IFDIR,
1745 FILE_ATTRIBUTE_DIRECTORY, NULL);
1748 /* Create a regular file or alternate data stream in the WIM image. */
1750 wimfs_mknod(const char *path, mode_t mode, dev_t rdev)
1752 const char *stream_name;
1753 struct fuse_context *fuse_ctx = fuse_get_context();
1754 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
1759 if ((wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
1760 && (stream_name = path_stream_name(path))) {
1761 /* Make an alternate data stream */
1762 struct wim_ads_entry *new_entry;
1763 struct wim_inode *inode;
1765 char *p = (char*)stream_name - 1;
1766 wimlib_assert(*p == ':');
1769 inode = wim_pathname_to_inode(wimfs_ctx->wim, path);
1772 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)
1774 if (inode_get_ads_entry(inode, stream_name, NULL))
1776 new_entry = inode_add_ads(inode, stream_name);
1781 /* Make a normal file (not an alternate data stream) */
1782 return create_dentry(fuse_ctx, path, mode | S_IFREG,
1783 FILE_ATTRIBUTE_NORMAL, NULL);
1789 wimfs_open(const char *path, struct fuse_file_info *fi)
1791 struct wim_dentry *dentry;
1792 struct wim_lookup_table_entry *lte;
1794 struct wimfs_fd *fd;
1795 struct wim_inode *inode;
1798 struct wimfs_context *ctx = wimfs_get_context();
1799 struct wim_lookup_table_entry **back_ptr;
1801 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
1802 &dentry, <e, &stream_idx);
1806 inode = dentry->d_inode;
1808 if (stream_idx == 0) {
1810 back_ptr = &inode->i_lte;
1812 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
1813 back_ptr = &inode->i_ads_entries[stream_idx - 1].lte;
1816 /* The file resource may be in the staging directory (read-write mounts
1817 * only) or in the WIM. If it's in the staging directory, we need to
1818 * open a native file descriptor for the corresponding file. Otherwise,
1819 * we can read the file resource directly from the WIM file if we are
1820 * opening it read-only, but we need to extract the resource to the
1821 * staging directory if we are opening it writable. */
1823 if (flags_writable(fi->flags) &&
1824 (!lte || lte->resource_location != RESOURCE_IN_STAGING_FILE)) {
1825 u64 size = (lte) ? wim_resource_size(lte) : 0;
1826 ret = extract_resource_to_staging_dir(inode, stream_id,
1833 ret = alloc_wimfs_fd(inode, stream_id, lte, &fd,
1834 wimfs_ctx_readonly(ctx));
1838 if (lte && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
1839 fd->staging_fd = open(lte->staging_file_name, fi->flags);
1840 if (fd->staging_fd == -1) {
1841 int errno_save = errno;
1846 fi->fh = (uintptr_t)fd;
1850 /* Opens a directory. */
1852 wimfs_opendir(const char *path, struct fuse_file_info *fi)
1854 struct wim_inode *inode;
1856 struct wimfs_fd *fd = NULL;
1857 struct wimfs_context *ctx = wimfs_get_context();
1858 WIMStruct *w = ctx->wim;
1860 inode = wim_pathname_to_inode(w, path);
1863 if (!inode_is_directory(inode))
1865 ret = alloc_wimfs_fd(inode, 0, NULL, &fd, wimfs_ctx_readonly(ctx));
1866 fi->fh = (uintptr_t)fd;
1872 * Read data from a file in the WIM or in the staging directory.
1875 wimfs_read(const char *path, char *buf, size_t size,
1876 off_t offset, struct fuse_file_info *fi)
1878 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1889 res_size = wim_resource_size(fd->f_lte);
1893 if (offset > res_size)
1896 size = min(size, res_size - offset);
1900 switch (fd->f_lte->resource_location) {
1901 case RESOURCE_IN_STAGING_FILE:
1902 ret = full_pread(fd->staging_fd, buf, size, offset);
1906 case RESOURCE_IN_WIM:
1907 if (read_partial_wim_resource_into_buf(fd->f_lte, size,
1913 case RESOURCE_IN_ATTACHED_BUFFER:
1914 memcpy(buf, fd->f_lte->attached_buffer + offset, size);
1918 ERROR("Invalid resource location");
1925 struct fill_params {
1927 fuse_fill_dir_t filler;
1931 dentry_fuse_fill(struct wim_dentry *dentry, void *arg)
1933 struct fill_params *fill_params = arg;
1935 char *file_name_mbs;
1936 size_t file_name_mbs_nbytes;
1939 ret = utf16le_to_tstr(dentry->file_name,
1940 dentry->file_name_nbytes,
1942 &file_name_mbs_nbytes);
1946 ret = fill_params->filler(fill_params->buf, file_name_mbs, NULL, 0);
1947 FREE(file_name_mbs);
1951 /* Fills in the entries of the directory specified by @path using the
1952 * FUSE-provided function @filler. */
1954 wimfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
1955 off_t offset, struct fuse_file_info *fi)
1957 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1958 struct wim_inode *inode;
1963 inode = fd->f_inode;
1965 struct fill_params fill_params = {
1970 filler(buf, ".", NULL, 0);
1971 filler(buf, "..", NULL, 0);
1973 return for_dentry_in_rbtree(inode->i_children.rb_node,
1974 dentry_fuse_fill, &fill_params);
1979 wimfs_readlink(const char *path, char *buf, size_t buf_len)
1981 struct wimfs_context *ctx = wimfs_get_context();
1982 struct wim_inode *inode = wim_pathname_to_inode(ctx->wim, path);
1986 if (!inode_is_symlink(inode))
1989 return -ENAMETOOLONG;
1990 ret = wim_inode_readlink(inode, buf, buf_len - 1);
1992 wimlib_assert(ret <= buf_len - 1);
1995 } else if (ret == -ENAMETOOLONG) {
1996 buf[buf_len - 1] = '\0';
2003 wimfs_release(const char *path, struct fuse_file_info *fi)
2005 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2006 return close_wimfs_fd(fd);
2009 /* Close a directory */
2011 wimfs_releasedir(const char *path, struct fuse_file_info *fi)
2013 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2014 return close_wimfs_fd(fd);
2018 /* Remove an alternate data stream through the XATTR interface */
2020 wimfs_removexattr(const char *path, const char *name)
2022 struct wim_inode *inode;
2023 struct wim_ads_entry *ads_entry;
2025 struct wimfs_context *ctx = wimfs_get_context();
2027 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2030 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2034 inode = wim_pathname_to_inode(ctx->wim, path);
2038 ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2041 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2046 /* Renames a file or directory. See rename (3) */
2048 wimfs_rename(const char *from, const char *to)
2050 return rename_wim_path(wimfs_get_WIMStruct(), from, to);
2053 /* Remove a directory */
2055 wimfs_rmdir(const char *path)
2057 struct wim_dentry *dentry;
2058 WIMStruct *w = wimfs_get_WIMStruct();
2060 dentry = get_dentry(w, path);
2064 if (!dentry_is_directory(dentry))
2067 if (dentry_has_children(dentry))
2070 remove_dentry(dentry, w->lookup_table);
2075 /* Write an alternate data stream through the XATTR interface */
2077 wimfs_setxattr(const char *path, const char *name,
2078 const char *value, size_t size, int flags)
2080 struct wim_ads_entry *existing_ads_entry;
2081 struct wim_inode *inode;
2083 struct wimfs_context *ctx = wimfs_get_context();
2086 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2089 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2093 inode = wim_pathname_to_inode(ctx->wim, path);
2097 existing_ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2098 if (existing_ads_entry) {
2099 if (flags & XATTR_CREATE)
2102 if (flags & XATTR_REPLACE)
2106 ret = inode_add_ads_with_data(inode, name, value,
2107 size, ctx->wim->lookup_table);
2109 if (existing_ads_entry)
2110 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2119 wimfs_symlink(const char *to, const char *from)
2121 struct fuse_context *fuse_ctx = fuse_get_context();
2122 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
2123 struct wim_dentry *dentry;
2126 ret = create_dentry(fuse_ctx, from, S_IFLNK | 0777,
2127 FILE_ATTRIBUTE_REPARSE_POINT, &dentry);
2129 dentry->d_inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
2130 ret = wim_inode_set_symlink(dentry->d_inode, to,
2131 wimfs_ctx->wim->lookup_table);
2133 remove_dentry(dentry, wimfs_ctx->wim->lookup_table);
2134 if (ret == WIMLIB_ERR_NOMEM)
2144 /* Reduce the size of a file */
2146 wimfs_truncate(const char *path, off_t size)
2148 struct wim_dentry *dentry;
2149 struct wim_lookup_table_entry *lte;
2153 struct wim_inode *inode;
2154 struct wimfs_context *ctx = wimfs_get_context();
2156 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
2157 &dentry, <e, &stream_idx);
2162 if (lte == NULL && size == 0)
2165 if (lte->resource_location == RESOURCE_IN_STAGING_FILE) {
2166 ret = truncate(lte->staging_file_name, size);
2170 lte->resource_entry.original_size = size;
2172 /* File in WIM. Extract it to the staging directory, but only
2173 * the first @size bytes of it. */
2174 struct wim_lookup_table_entry **back_ptr;
2176 inode = dentry->d_inode;
2177 if (stream_idx == 0) {
2179 back_ptr = &inode->i_lte;
2181 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
2182 back_ptr = &inode->i_ads_entries[stream_idx - 1].lte;
2184 ret = extract_resource_to_staging_dir(inode, stream_id,
2191 /* Unlink a non-directory or alternate data stream */
2193 wimfs_unlink(const char *path)
2195 struct wim_dentry *dentry;
2196 struct wim_lookup_table_entry *lte;
2199 struct wimfs_context *ctx = wimfs_get_context();
2201 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
2202 &dentry, <e, &stream_idx);
2207 if (stream_idx == 0)
2208 remove_dentry(dentry, ctx->wim->lookup_table);
2210 inode_remove_ads(dentry->d_inode, stream_idx - 1,
2211 ctx->wim->lookup_table);
2215 #ifdef HAVE_UTIMENSAT
2217 * Change the timestamp on a file dentry.
2219 * Note that alternate data streams do not have their own timestamps.
2222 wimfs_utimens(const char *path, const struct timespec tv[2])
2224 struct wim_dentry *dentry;
2225 struct wim_inode *inode;
2226 WIMStruct *w = wimfs_get_WIMStruct();
2228 dentry = get_dentry(w, path);
2231 inode = dentry->d_inode;
2233 if (tv[0].tv_nsec != UTIME_OMIT) {
2234 if (tv[0].tv_nsec == UTIME_NOW)
2235 inode->i_last_access_time = get_wim_timestamp();
2237 inode->i_last_access_time = timespec_to_wim_timestamp(tv[0]);
2239 if (tv[1].tv_nsec != UTIME_OMIT) {
2240 if (tv[1].tv_nsec == UTIME_NOW)
2241 inode->i_last_write_time = get_wim_timestamp();
2243 inode->i_last_write_time = timespec_to_wim_timestamp(tv[1]);
2247 #else /* HAVE_UTIMENSAT */
2249 wimfs_utime(const char *path, struct utimbuf *times)
2251 struct wim_dentry *dentry;
2252 struct wim_inode *inode;
2253 WIMStruct *w = wimfs_get_WIMStruct();
2255 dentry = get_dentry(w, path);
2258 inode = dentry->d_inode;
2260 inode->i_last_write_time = unix_timestamp_to_wim(times->modtime);
2261 inode->i_last_access_time = unix_timestamp_to_wim(times->actime);
2264 #endif /* !HAVE_UTIMENSAT */
2266 /* Writes to a file in the WIM filesystem.
2267 * It may be an alternate data stream, but here we don't even notice because we
2268 * just get a lookup table entry. */
2270 wimfs_write(const char *path, const char *buf, size_t size,
2271 off_t offset, struct fuse_file_info *fi)
2273 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2279 wimlib_assert(fd->f_lte != NULL);
2280 wimlib_assert(fd->f_lte->staging_file_name != NULL);
2281 wimlib_assert(fd->staging_fd != -1);
2282 wimlib_assert(fd->f_inode != NULL);
2284 /* Write the data. */
2285 ret = full_pwrite(fd->staging_fd, buf, size, offset);
2289 /* Update file size */
2290 if (offset + size > fd->f_lte->resource_entry.original_size) {
2291 DEBUG("Update file size %"PRIu64 " => %"PRIu64"",
2292 fd->f_lte->resource_entry.original_size,
2294 fd->f_lte->resource_entry.original_size = offset + size;
2297 /* Update timestamps */
2298 touch_inode(fd->f_inode);
2302 static struct fuse_operations wimfs_operations = {
2303 .chmod = wimfs_chmod,
2304 .chown = wimfs_chown,
2305 .destroy = wimfs_destroy,
2306 .fgetattr = wimfs_fgetattr,
2307 .ftruncate = wimfs_ftruncate,
2308 .getattr = wimfs_getattr,
2310 .getxattr = wimfs_getxattr,
2314 .listxattr = wimfs_listxattr,
2316 .mkdir = wimfs_mkdir,
2317 .mknod = wimfs_mknod,
2319 .opendir = wimfs_opendir,
2321 .readdir = wimfs_readdir,
2322 .readlink = wimfs_readlink,
2323 .release = wimfs_release,
2324 .releasedir = wimfs_releasedir,
2326 .removexattr = wimfs_removexattr,
2328 .rename = wimfs_rename,
2329 .rmdir = wimfs_rmdir,
2331 .setxattr = wimfs_setxattr,
2333 .symlink = wimfs_symlink,
2334 .truncate = wimfs_truncate,
2335 .unlink = wimfs_unlink,
2336 #ifdef HAVE_UTIMENSAT
2337 .utimens = wimfs_utimens,
2339 .utime = wimfs_utime,
2341 .write = wimfs_write,
2343 /* wimfs keeps file descriptor structures (struct wimfs_fd), so there is
2344 * no need to have the file path provided on operations such as read()
2345 * where only the file descriptor is needed. */
2346 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2347 .flag_nullpath_ok = 1,
2349 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 9)
2351 .flag_utime_omit_ok = 1,
2356 /* Mounts an image from a WIM file. */
2358 wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
2359 int mount_flags, WIMStruct **additional_swms,
2360 unsigned num_additional_swms,
2361 const char *staging_dir)
2367 struct wim_lookup_table *joined_tab, *wim_tab_save;
2368 struct wim_image_metadata *imd;
2369 struct wimfs_context ctx;
2370 struct wim_inode *inode;
2372 DEBUG("Mount: wim = %p, image = %d, dir = %s, flags = %d, ",
2373 wim, image, dir, mount_flags);
2376 ret = WIMLIB_ERR_INVALID_PARAM;
2380 ret = verify_swm_set(wim, additional_swms, num_additional_swms);
2384 if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) && (wim->hdr.total_parts != 1)) {
2385 ERROR("Cannot mount a split WIM read-write");
2386 ret = WIMLIB_ERR_SPLIT_UNSUPPORTED;
2390 if (num_additional_swms) {
2391 ret = new_joined_lookup_table(wim, additional_swms,
2392 num_additional_swms,
2396 wim_tab_save = wim->lookup_table;
2397 wim->lookup_table = joined_tab;
2400 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2401 ret = wim_run_full_verifications(wim);
2403 goto out_restore_lookup_table;
2406 ret = wim_checksum_unhashed_streams(wim);
2408 goto out_restore_lookup_table;
2410 ret = select_wim_image(wim, image);
2412 goto out_restore_lookup_table;
2414 DEBUG("Selected image %d", image);
2416 imd = wim_get_current_image_metadata(wim);
2418 if (imd->refcnt != 1) {
2419 ERROR("Cannot mount image that was just exported with "
2420 "wimlib_export_image()");
2421 ret = WIMLIB_ERR_INVALID_PARAM;
2422 goto out_restore_lookup_table;
2425 if (imd->modified) {
2426 ERROR("Cannot mount image that was added "
2427 "with wimlib_add_image()");
2428 ret = WIMLIB_ERR_INVALID_PARAM;
2429 goto out_restore_lookup_table;
2432 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2433 ret = lock_wim(wim, wim->in_fd);
2435 goto out_restore_lookup_table;
2438 /* Use default stream interface if one was not specified */
2439 if (!(mount_flags & (WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_NONE |
2440 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR |
2441 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)))
2442 mount_flags |= WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR;
2444 DEBUG("Initializing struct wimfs_context");
2445 init_wimfs_context(&ctx);
2447 ctx.mount_flags = mount_flags;
2448 ctx.image_inode_list = &imd->inode_list;
2449 ctx.default_uid = getuid();
2450 ctx.default_gid = getgid();
2451 wimlib_assert(list_empty(&imd->unhashed_streams));
2452 ctx.wim->lookup_table->unhashed_streams = &imd->unhashed_streams;
2453 if (mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
2454 ctx.default_lookup_flags = LOOKUP_FLAG_ADS_OK;
2456 DEBUG("Unlinking message queues in case they already exist");
2457 ret = set_message_queue_names(&ctx, dir);
2460 unlink_message_queues(&ctx);
2462 DEBUG("Preparing arguments to fuse_main()");
2464 dir_copy = STRDUP(dir);
2466 goto out_free_message_queue_names;
2469 argv[argc++] = "imagex";
2470 argv[argc++] = dir_copy;
2472 /* disable multi-threaded operation for read-write mounts */
2473 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)
2474 argv[argc++] = "-s";
2476 if (mount_flags & WIMLIB_MOUNT_FLAG_DEBUG)
2477 argv[argc++] = "-d";
2480 * We provide the use_ino option to the FUSE mount because we are going
2481 * to assign inode numbers ourselves. */
2482 char optstring[256] =
2486 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2489 ",default_permissions"
2491 argv[argc++] = "-o";
2492 argv[argc++] = optstring;
2493 if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)) {
2494 /* Read-write mount. Make the staging directory */
2495 ret = make_staging_dir(&ctx, staging_dir);
2497 goto out_free_dir_copy;
2499 /* Read-only mount */
2500 strcat(optstring, ",ro");
2502 if (mount_flags & WIMLIB_MOUNT_FLAG_ALLOW_OTHER)
2503 strcat(optstring, ",allow_other");
2509 DEBUG("FUSE command line (argc = %d): ", argc);
2510 for (i = 0; i < argc; i++) {
2511 fputs(argv[i], stdout);
2519 /* Mark dentry tree as modified if read-write mount. */
2520 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)
2523 /* Resolve the lookup table entries for every inode in the image, and
2524 * assign inode numbers */
2525 DEBUG("Resolving lookup table entries and assigning inode numbers");
2527 image_for_each_inode(inode, imd) {
2528 inode_resolve_ltes(inode, wim->lookup_table);
2529 inode->i_ino = ctx.next_ino++;
2531 DEBUG("(next_ino = %"PRIu64")", ctx.next_ino);
2533 DEBUG("Calling fuse_main()");
2535 ret = fuse_main(argc, argv, &wimfs_operations, &ctx);
2537 DEBUG("Returned from fuse_main() (ret = %d)", ret);
2540 ret = WIMLIB_ERR_FUSE;
2542 if (ctx.have_status)
2545 ret = WIMLIB_ERR_TIMEOUT;
2547 if (ctx.daemon_to_unmount_mq != (mqd_t)(-1)) {
2548 send_unmount_finished_msg(ctx.daemon_to_unmount_mq, ret);
2549 close_message_queues(&ctx);
2552 /* Try to delete the staging directory if a deletion wasn't yet
2553 * attempted due to an earlier error */
2554 if (ctx.staging_dir_name)
2555 delete_staging_dir(&ctx);
2559 wim->wim_locked = 0;
2560 out_free_message_queue_names:
2561 free_message_queue_names(&ctx);
2562 out_restore_lookup_table:
2563 if (num_additional_swms) {
2564 free_lookup_table(wim->lookup_table);
2565 wim->lookup_table = wim_tab_save;
2572 * Unmounts the WIM file that was previously mounted on @dir by using
2573 * wimlib_mount_image().
2576 wimlib_unmount_image(const char *dir, int unmount_flags,
2577 wimlib_progress_func_t progress_func)
2580 struct wimfs_context wimfs_ctx;
2582 init_wimfs_context(&wimfs_ctx);
2584 ret = set_message_queue_names(&wimfs_ctx, dir);
2588 ret = open_message_queues(&wimfs_ctx, false);
2590 goto out_free_message_queue_names;
2592 ret = send_unmount_request_msg(wimfs_ctx.unmount_to_daemon_mq,
2594 progress_func != NULL);
2596 goto out_close_message_queues;
2598 ret = execute_fusermount(dir);
2600 goto out_close_message_queues;
2602 struct unmount_msg_handler_context handler_ctx = {
2604 .timeout_seconds = 5,
2607 .progress_func = progress_func,
2610 ret = message_loop(wimfs_ctx.daemon_to_unmount_mq,
2611 &unmount_msg_handler_callbacks,
2614 ret = handler_ctx.status;
2615 out_close_message_queues:
2616 close_message_queues(&wimfs_ctx);
2617 out_free_message_queue_names:
2618 free_message_queue_names(&wimfs_ctx);
2623 #else /* WITH_FUSE */
2627 mount_unsupported_error()
2629 #if defined(__WIN32__)
2630 ERROR("Sorry-- Mounting WIM images is not supported on Windows!");
2632 ERROR("wimlib was compiled with --without-fuse, which disables support "
2633 "for mounting WIMs.");
2635 return WIMLIB_ERR_UNSUPPORTED;
2639 wimlib_unmount_image(const tchar *dir, int unmount_flags,
2640 wimlib_progress_func_t progress_func)
2642 return mount_unsupported_error();
2646 wimlib_mount_image(WIMStruct *wim, int image, const tchar *dir,
2647 int mount_flags, WIMStruct **additional_swms,
2648 unsigned num_additional_swms,
2649 const tchar *staging_dir)
2651 return mount_unsupported_error();
2654 #endif /* !WITH_FUSE */