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 * Add a new dentry with a new inode to a WIM image.
305 * Returns 0 on success, or negative error number on failure.
308 create_dentry(struct fuse_context *fuse_ctx, const char *path,
309 mode_t mode, int attributes, struct wim_dentry **dentry_ret)
311 struct wim_dentry *parent;
312 struct wim_dentry *new;
313 const char *basename;
314 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
317 parent = get_parent_dentry(wimfs_ctx->wim, path);
321 if (!dentry_is_directory(parent))
324 basename = path_basename(path);
325 if (get_dentry_child_with_name(parent, basename))
328 ret = new_dentry_with_inode(basename, &new);
332 new->d_inode->i_resolved = 1;
333 new->d_inode->i_ino = wimfs_ctx->next_ino++;
334 new->d_inode->i_attributes = attributes;
336 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
337 if (inode_set_unix_data(new->d_inode,
340 mode & ~fuse_ctx->umask,
341 wimfs_ctx->wim->lookup_table,
342 UNIX_DATA_ALL | UNIX_DATA_CREATE))
348 dentry_add_child(parent, new);
349 list_add_tail(&new->d_inode->i_list, wimfs_ctx->image_inode_list);
355 /* Remove a dentry from a mounted WIM image; i.e. remove an alias for the
356 * corresponding inode.
358 * If there are no remaining references to the inode either through dentries or
359 * open file descriptors, the inode is freed. Otherwise, the inode is not
360 * removed, but the dentry is unlinked and freed.
362 * Either way, all lookup table entries referenced by the inode have their
363 * reference count decremented. If a lookup table entry has no open file
364 * descriptors and no references remaining, it is freed, and the corresponding
365 * staging file is unlinked.
368 remove_dentry(struct wim_dentry *dentry,
369 struct wim_lookup_table *lookup_table)
371 struct wim_inode *inode = dentry->d_inode;
372 struct wim_lookup_table_entry *lte;
375 for (i = 0; i <= inode->i_num_ads; i++) {
376 lte = inode_stream_lte_resolved(inode, i);
378 lte_decrement_refcnt(lte, lookup_table);
380 unlink_dentry(dentry);
385 inode_default_unix_mode(const struct wim_inode *inode)
387 if (inode_is_symlink(inode))
388 return S_IFLNK | 0777;
389 else if (inode_is_directory(inode))
390 return S_IFDIR | 0777;
392 return S_IFREG | 0777;
395 /* Transfers file attributes from a struct wim_inode to a `stat' buffer.
397 * The lookup table entry tells us which stream in the inode we are statting.
398 * For a named data stream, everything returned is the same as the unnamed data
399 * stream except possibly the size and block count. */
401 inode_to_stbuf(const struct wim_inode *inode,
402 const struct wim_lookup_table_entry *lte,
405 const struct wimfs_context *ctx = wimfs_get_context();
407 memset(stbuf, 0, sizeof(struct stat));
408 stbuf->st_mode = inode_default_unix_mode(inode);
409 stbuf->st_uid = ctx->default_uid;
410 stbuf->st_gid = ctx->default_gid;
411 if (ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
412 struct wimlib_unix_data unix_data;
413 if (inode_get_unix_data(inode, &unix_data, NULL) == 0) {
414 stbuf->st_uid = unix_data.uid;
415 stbuf->st_gid = unix_data.gid;
416 stbuf->st_mode = unix_data.mode;
419 stbuf->st_ino = (ino_t)inode->i_ino;
420 stbuf->st_nlink = inode->i_nlink;
422 stbuf->st_size = wim_resource_size(lte);
425 #ifdef HAVE_STAT_NANOSECOND_PRECISION
426 stbuf->st_atim = wim_timestamp_to_timespec(inode->i_last_access_time);
427 stbuf->st_mtim = wim_timestamp_to_timespec(inode->i_last_write_time);
428 stbuf->st_ctim = stbuf->st_mtim;
430 stbuf->st_atime = wim_timestamp_to_unix(inode->i_last_access_time);
431 stbuf->st_mtime = wim_timestamp_to_unix(inode->i_last_write_time);
432 stbuf->st_ctime = stbuf->st_mtime;
434 stbuf->st_blocks = (stbuf->st_size + 511) / 512;
439 touch_inode(struct wim_inode *inode)
441 u64 now = get_wim_timestamp();
442 inode->i_last_access_time = now;
443 inode->i_last_write_time = now;
446 /* Creates a new staging file and returns its file descriptor opened for
449 * @name_ret: A location into which the a pointer to the newly allocated name of
450 * the staging file is stored.
452 * @ctx: Context for the WIM filesystem; this provides the name of the
455 * On success, returns the file descriptor for the staging file, opened for
456 * writing. On failure, returns -1 and sets errno.
459 create_staging_file(char **name_ret, struct wimfs_context *ctx)
467 static const size_t STAGING_FILE_NAME_LEN = 20;
469 name_len = ctx->staging_dir_name_len + 1 + STAGING_FILE_NAME_LEN;
470 name = MALLOC(name_len + 1);
478 memcpy(name, ctx->staging_dir_name, ctx->staging_dir_name_len);
479 name[ctx->staging_dir_name_len] = '/';
480 randomize_char_array_with_alnum(name + ctx->staging_dir_name_len + 1,
481 STAGING_FILE_NAME_LEN);
482 name[name_len] = '\0';
485 /* Just in case, verify that the randomly generated name doesn't name an
486 * existing file, and try again if so */
487 } while (stat(name, &stbuf) == 0);
489 if (errno != ENOENT) /* other error?! */
492 /* doesn't exist--- ok */
494 DEBUG("Creating staging file `%s'", name);
496 fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0600);
508 * Extract a WIM resource to the staging directory.
510 * @inode: Inode that contains the stream we are extracting
512 * @stream_id: Identifier for the stream (it stays constant even if the indices
513 * of the stream entries are changed)
515 * @lte: Pointer to pointer to the lookup table entry for the stream we need to
516 * extract, or NULL if there was no lookup table entry present for the stream
518 * @size: Number of bytes of the stream we want to extract (this supports the
519 * wimfs_truncate() function). It may be more than the actual stream length, in
520 * which case the extra space is filled with zeroes.
522 * @ctx: Context for the WIM filesystem.
524 * Returns 0 on success or a negative error code on failure.
527 extract_resource_to_staging_dir(struct wim_inode *inode,
529 struct wim_lookup_table_entry **lte,
531 struct wimfs_context *ctx)
533 char *staging_file_name;
536 struct wim_lookup_table_entry *old_lte, *new_lte;
539 DEBUG("Extracting resource to staging dir: inode %"PRIu64", "
540 "stream id %"PRIu32, inode->i_ino, stream_id);
544 wimlib_assert(old_lte == NULL ||
545 old_lte->resource_location != RESOURCE_IN_STAGING_FILE);
547 /* Create the staging file */
548 fd = create_staging_file(&staging_file_name, ctx);
552 /* Extract the stream to the staging file (possibly truncated) */
554 extract_size = min(wim_resource_size(old_lte), size);
555 ret = extract_wim_resource_to_fd(old_lte, fd, extract_size);
561 /* In the case of truncate() to more than the file length, extend the
562 * file with zeroes by calling ftruncate() on the underlying staging
564 if (ret == 0 && size > extract_size)
565 ret = ftruncate(fd, size);
567 /* Close the staging file descriptor and check for errors. If there's
568 * an error, unlink the staging file. */
569 if (ret != 0 || close(fd) != 0) {
575 goto out_delete_staging_file;
578 /* Now deal with the lookup table entries. We may be able to re-use the
579 * existing entry, but we may have to create a new one instead. */
581 if (old_lte && inode->i_nlink == old_lte->refcnt) {
582 /* The reference count of the existing lookup table entry is the
583 * same as the link count of the inode that contains the stream
584 * we're opening. Therefore, ALL the references to the lookup
585 * table entry correspond to the stream we're trying to extract,
586 * so the lookup table entry can be re-used. */
587 DEBUG("Re-using lookup table entry");
588 lookup_table_unlink(ctx->wim->lookup_table, old_lte);
592 /* There's an existing lookup table entry, but its
593 * reference count is greater than the link count for
594 * the inode containing a stream we're opening.
595 * Therefore, we need to split the lookup table entry.
597 wimlib_assert(old_lte->refcnt > inode->i_nlink);
598 DEBUG("Splitting lookup table entry "
599 "(inode->i_nlink = %u, old_lte->refcnt = %u)",
600 inode->i_nlink, old_lte->refcnt);
603 new_lte = new_lookup_table_entry();
606 goto out_delete_staging_file;
609 /* There may already be open file descriptors to this stream if
610 * it's previously been opened read-only, but just now we're
611 * opening it read-write. Identify those file descriptors and
612 * change their lookup table entry pointers to point to the new
613 * lookup table entry, and open staging file descriptors for
616 * At the same time, we need to count the number of these opened
617 * file descriptors to the new lookup table entry. If there's
618 * an old lookup table entry, this number needs to be subtracted
619 * from the fd's opened to the old entry. */
620 for (u16 i = 0, j = 0; j < inode->i_num_opened_fds; i++) {
621 struct wimfs_fd *fd = inode->i_fds[i];
623 if (fd->stream_id == stream_id) {
624 wimlib_assert(fd->f_lte == old_lte);
625 wimlib_assert(fd->staging_fd == -1);
627 new_lte->num_opened_fds++;
628 fd->staging_fd = open(staging_file_name, O_RDONLY);
629 if (fd->staging_fd == -1) {
631 goto out_revert_fd_changes;
637 DEBUG("%hu fd's were already opened to the file we extracted",
638 new_lte->num_opened_fds);
640 old_lte->num_opened_fds -= new_lte->num_opened_fds;
641 old_lte->refcnt -= inode->i_nlink;
645 new_lte->refcnt = inode->i_nlink;
646 new_lte->resource_location = RESOURCE_IN_STAGING_FILE;
647 new_lte->staging_file_name = staging_file_name;
648 new_lte->resource_entry.original_size = size;
650 lookup_table_insert_unhashed(ctx->wim->lookup_table, new_lte,
654 out_revert_fd_changes:
655 for (u16 i = 0, j = 0; j < new_lte->num_opened_fds; i++) {
656 struct wimfs_fd *fd = inode->i_fds[i];
657 if (fd && fd->stream_id == stream_id && fd->f_lte == new_lte) {
659 if (fd->staging_fd != -1) {
660 close(fd->staging_fd);
666 free_lookup_table_entry(new_lte);
667 out_delete_staging_file:
668 unlink(staging_file_name);
669 FREE(staging_file_name);
674 * Creates a randomly named staging directory and saves its name in the
675 * filesystem context structure.
678 make_staging_dir(struct wimfs_context *ctx, const char *user_prefix)
680 static const size_t random_suffix_len = 10;
681 static const char *common_suffix = ".staging";
682 static const size_t common_suffix_len = 8;
684 char *staging_dir_name = NULL;
685 size_t staging_dir_name_len;
687 const char *wim_basename;
688 char *real_user_prefix = NULL;
692 real_user_prefix = realpath(user_prefix, NULL);
693 if (!real_user_prefix) {
694 ERROR_WITH_ERRNO("Could not resolve `%s'",
696 ret = WIMLIB_ERR_NOTDIR;
699 wim_basename = path_basename(ctx->wim->filename);
700 prefix_len = strlen(real_user_prefix) + 1 + strlen(wim_basename);
702 prefix_len = strlen(ctx->wim->filename);
705 staging_dir_name_len = prefix_len + common_suffix_len + random_suffix_len;
707 staging_dir_name = MALLOC(staging_dir_name_len + 1);
708 if (!staging_dir_name) {
709 ret = WIMLIB_ERR_NOMEM;
713 if (real_user_prefix)
714 sprintf(staging_dir_name, "%s/%s", real_user_prefix, wim_basename);
716 strcpy(staging_dir_name, ctx->wim->filename);
718 strcat(staging_dir_name, common_suffix);
720 randomize_char_array_with_alnum(staging_dir_name + prefix_len + common_suffix_len,
723 staging_dir_name[staging_dir_name_len] = '\0';
725 if (mkdir(staging_dir_name, 0700) != 0) {
726 ERROR_WITH_ERRNO("Failed to create temporary directory `%s'",
728 ret = WIMLIB_ERR_MKDIR;
733 FREE(real_user_prefix);
735 ctx->staging_dir_name = staging_dir_name;
736 ctx->staging_dir_name_len = staging_dir_name_len;
738 FREE(staging_dir_name);
744 remove_file_or_directory(const char *fpath, const struct stat *sb,
745 int typeflag, struct FTW *ftwbuf)
747 if (remove(fpath) == 0)
750 ERROR_WITH_ERRNO("Cannot remove `%s'", fpath);
751 return WIMLIB_ERR_DELETE_STAGING_DIR;
756 * Deletes the staging directory and all the files contained in it.
759 delete_staging_dir(struct wimfs_context *ctx)
762 ret = nftw(ctx->staging_dir_name, remove_file_or_directory,
764 FREE(ctx->staging_dir_name);
765 ctx->staging_dir_name = NULL;
770 inode_close_fds(struct wim_inode *inode)
772 u16 num_opened_fds = inode->i_num_opened_fds;
773 for (u16 i = 0, j = 0; j < num_opened_fds; i++) {
774 struct wimfs_fd *fd = inode->i_fds[i];
776 wimlib_assert(fd->f_inode == inode);
777 int ret = close_wimfs_fd(fd);
786 /* Overwrites the WIM file, with changes saved. */
788 rebuild_wim(struct wimfs_context *ctx, int write_flags,
789 wimlib_progress_func_t progress_func)
792 struct wim_lookup_table_entry *lte, *tmp;
793 WIMStruct *w = ctx->wim;
794 struct wim_image_metadata *imd = wim_get_current_image_metadata(ctx->wim);
796 DEBUG("Closing all staging file descriptors.");
797 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
798 ret = inode_close_fds(lte->back_inode);
803 DEBUG("Freeing entries for zero-length streams");
804 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
805 wimlib_assert(lte->unhashed);
806 if (wim_resource_size(lte) == 0) {
807 print_lookup_table_entry(lte, stderr);
808 struct wim_lookup_table_entry **back_ptr;
809 back_ptr = retrieve_lte_pointer(lte);
811 list_del(<e->unhashed_list);
812 free_lookup_table_entry(lte);
816 xml_update_image_info(w, w->current_image);
817 ret = wimlib_overwrite(w, write_flags, 0, progress_func);
819 ERROR("Failed to commit changes to mounted WIM image");
823 /* Simple function that returns the concatenation of 2 strings. */
825 strcat_dup(const char *s1, const char *s2, size_t max_len)
827 size_t len = strlen(s1) + strlen(s2);
830 char *p = MALLOC(len + 1);
833 snprintf(p, len + 1, "%s%s", s1, s2);
838 set_message_queue_names(struct wimfs_context *ctx, const char *mount_dir)
840 static const char *u2d_prefix = "/wimlib-unmount-to-daemon-mq";
841 static const char *d2u_prefix = "/wimlib-daemon-to-unmount-mq";
846 dir_path = realpath(mount_dir, NULL);
848 ERROR_WITH_ERRNO("Failed to resolve path \"%s\"", mount_dir);
850 return WIMLIB_ERR_NOMEM;
852 return WIMLIB_ERR_NOTDIR;
855 for (p = dir_path; *p; p++)
859 ctx->unmount_to_daemon_mq_name = strcat_dup(u2d_prefix, dir_path,
861 if (!ctx->unmount_to_daemon_mq_name) {
862 ret = WIMLIB_ERR_NOMEM;
863 goto out_free_dir_path;
865 ctx->daemon_to_unmount_mq_name = strcat_dup(d2u_prefix, dir_path,
867 if (!ctx->daemon_to_unmount_mq_name) {
868 ret = WIMLIB_ERR_NOMEM;
869 goto out_free_unmount_to_daemon_mq_name;
873 goto out_free_dir_path;
874 out_free_unmount_to_daemon_mq_name:
875 FREE(ctx->unmount_to_daemon_mq_name);
876 ctx->unmount_to_daemon_mq_name = NULL;
883 free_message_queue_names(struct wimfs_context *ctx)
885 FREE(ctx->unmount_to_daemon_mq_name);
886 FREE(ctx->daemon_to_unmount_mq_name);
887 ctx->unmount_to_daemon_mq_name = NULL;
888 ctx->daemon_to_unmount_mq_name = NULL;
892 * Opens two POSIX message queue: one for sending messages from the unmount
893 * process to the daemon process, and one to go the other way. The names of the
894 * message queues, which must be system-wide unique, are be based on the mount
897 * @daemon specifies whether the calling process is the filesystem daemon or the
901 open_message_queues(struct wimfs_context *ctx, bool daemon)
903 int unmount_to_daemon_mq_flags = O_WRONLY | O_CREAT;
904 int daemon_to_unmount_mq_flags = O_RDONLY | O_CREAT;
910 swap(unmount_to_daemon_mq_flags, daemon_to_unmount_mq_flags);
916 orig_umask = umask(0000);
917 DEBUG("Opening message queue \"%s\"", ctx->unmount_to_daemon_mq_name);
918 ctx->unmount_to_daemon_mq = mq_open(ctx->unmount_to_daemon_mq_name,
919 unmount_to_daemon_mq_flags, mode, NULL);
921 if (ctx->unmount_to_daemon_mq == (mqd_t)-1) {
922 ERROR_WITH_ERRNO("mq_open()");
923 ret = WIMLIB_ERR_MQUEUE;
927 DEBUG("Opening message queue \"%s\"", ctx->daemon_to_unmount_mq_name);
928 ctx->daemon_to_unmount_mq = mq_open(ctx->daemon_to_unmount_mq_name,
929 daemon_to_unmount_mq_flags, mode, NULL);
931 if (ctx->daemon_to_unmount_mq == (mqd_t)-1) {
932 ERROR_WITH_ERRNO("mq_open()");
933 mq_close(ctx->unmount_to_daemon_mq);
934 mq_unlink(ctx->unmount_to_daemon_mq_name);
935 ctx->unmount_to_daemon_mq = (mqd_t)-1;
936 ret = WIMLIB_ERR_MQUEUE;
945 /* Try to determine the maximum message size of a message queue. The return
946 * value is the maximum message size, or a guess of 8192 bytes if it cannot be
949 mq_get_msgsize(mqd_t mq)
951 static const char *msgsize_max_file = "/proc/sys/fs/mqueue/msgsize_max";
956 if (mq_getattr(mq, &attr) == 0) {
957 msgsize = attr.mq_msgsize;
959 ERROR_WITH_ERRNO("mq_getattr()");
960 ERROR("Attempting to read %s", msgsize_max_file);
961 fp = fopen(msgsize_max_file, "rb");
963 if (fscanf(fp, "%ld", &msgsize) != 1) {
964 ERROR("Assuming message size of 8192");
969 ERROR_WITH_ERRNO("Failed to open the file `%s'",
971 ERROR("Assuming message size of 8192");
979 get_mailbox(mqd_t mq, long needed_msgsize, long *msgsize_ret,
985 msgsize = mq_get_msgsize(mq);
987 if (msgsize < needed_msgsize) {
988 ERROR("Message queue max size must be at least %ld!",
990 return WIMLIB_ERR_MQUEUE;
993 mailbox = MALLOC(msgsize);
995 ERROR("Failed to allocate %ld bytes for mailbox", msgsize);
996 return WIMLIB_ERR_NOMEM;
998 *msgsize_ret = msgsize;
999 *mailbox_ret = mailbox;
1004 unlink_message_queues(struct wimfs_context *ctx)
1006 mq_unlink(ctx->unmount_to_daemon_mq_name);
1007 mq_unlink(ctx->daemon_to_unmount_mq_name);
1010 /* Closes the message queues, which are allocated in static variables */
1012 close_message_queues(struct wimfs_context *ctx)
1014 DEBUG("Closing message queues");
1015 mq_close(ctx->unmount_to_daemon_mq);
1016 ctx->unmount_to_daemon_mq = (mqd_t)(-1);
1017 mq_close(ctx->daemon_to_unmount_mq);
1018 ctx->daemon_to_unmount_mq = (mqd_t)(-1);
1019 unlink_message_queues(ctx);
1023 struct unmount_msg_hdr {
1030 struct msg_unmount_request {
1031 struct unmount_msg_hdr hdr;
1033 u8 want_progress_messages;
1036 struct msg_daemon_info {
1037 struct unmount_msg_hdr hdr;
1042 struct msg_unmount_finished {
1043 struct unmount_msg_hdr hdr;
1047 struct msg_write_streams_progress {
1048 struct unmount_msg_hdr hdr;
1049 union wimlib_progress_info info;
1053 MSG_TYPE_UNMOUNT_REQUEST,
1054 MSG_TYPE_DAEMON_INFO,
1055 MSG_TYPE_WRITE_STREAMS_PROGRESS,
1056 MSG_TYPE_UNMOUNT_FINISHED,
1060 struct msg_handler_context_hdr {
1061 int timeout_seconds;
1064 struct unmount_msg_handler_context {
1065 struct msg_handler_context_hdr hdr;
1069 wimlib_progress_func_t progress_func;
1072 struct daemon_msg_handler_context {
1073 struct msg_handler_context_hdr hdr;
1074 struct wimfs_context *wimfs_ctx;
1078 send_unmount_request_msg(mqd_t mq, int unmount_flags, u8 want_progress_messages)
1080 DEBUG("Sending unmount request msg");
1081 struct msg_unmount_request msg = {
1083 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1084 .cur_version = WIMLIB_VERSION_CODE,
1085 .msg_type = MSG_TYPE_UNMOUNT_REQUEST,
1086 .msg_size = sizeof(msg),
1088 .unmount_flags = unmount_flags,
1089 .want_progress_messages = want_progress_messages,
1092 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1093 ERROR_WITH_ERRNO("Failed to communicate with filesystem daemon");
1094 return WIMLIB_ERR_MQUEUE;
1100 send_daemon_info_msg(mqd_t mq, pid_t pid, int mount_flags)
1102 DEBUG("Sending daemon info msg (pid = %d, mount_flags=%x)",
1105 struct msg_daemon_info msg = {
1107 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1108 .cur_version = WIMLIB_VERSION_CODE,
1109 .msg_type = MSG_TYPE_DAEMON_INFO,
1110 .msg_size = sizeof(msg),
1113 .mount_flags = mount_flags,
1115 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1116 ERROR_WITH_ERRNO("Failed to send daemon info to unmount process");
1117 return WIMLIB_ERR_MQUEUE;
1123 send_unmount_finished_msg(mqd_t mq, int status)
1125 DEBUG("Sending unmount finished msg");
1126 struct msg_unmount_finished msg = {
1128 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1129 .cur_version = WIMLIB_VERSION_CODE,
1130 .msg_type = MSG_TYPE_UNMOUNT_FINISHED,
1131 .msg_size = sizeof(msg),
1135 if (mq_send(mq, (void*)&msg, sizeof(msg), 1))
1136 ERROR_WITH_ERRNO("Failed to send status to unmount process");
1140 unmount_progress_func(enum wimlib_progress_msg msg,
1141 const union wimlib_progress_info *info)
1143 if (msg == WIMLIB_PROGRESS_MSG_WRITE_STREAMS) {
1144 struct msg_write_streams_progress msg = {
1146 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1147 .cur_version = WIMLIB_VERSION_CODE,
1148 .msg_type = MSG_TYPE_WRITE_STREAMS_PROGRESS,
1149 .msg_size = sizeof(msg),
1153 if (mq_send(wimfs_get_context()->daemon_to_unmount_mq,
1154 (void*)&msg, sizeof(msg), 1))
1156 ERROR_WITH_ERRNO("Failed to send progress information "
1157 "to unmount process");
1164 msg_unmount_request_handler(const void *_msg, void *_handler_ctx)
1166 const struct msg_unmount_request *msg = _msg;
1167 struct daemon_msg_handler_context *handler_ctx = _handler_ctx;
1168 struct wimfs_context *wimfs_ctx;
1172 wimlib_progress_func_t progress_func;
1174 DEBUG("Handling unmount request msg");
1176 wimfs_ctx = handler_ctx->wimfs_ctx;
1177 if (msg->hdr.msg_size < sizeof(*msg)) {
1178 status = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1182 unmount_flags = msg->unmount_flags;
1183 if (msg->want_progress_messages)
1184 progress_func = unmount_progress_func;
1186 progress_func = NULL;
1188 ret = send_daemon_info_msg(wimfs_ctx->daemon_to_unmount_mq, getpid(),
1189 wimfs_ctx->mount_flags);
1195 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1196 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_COMMIT) {
1197 int write_flags = 0;
1198 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY)
1199 write_flags |= WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
1200 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_REBUILD)
1201 write_flags |= WIMLIB_WRITE_FLAG_REBUILD;
1202 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_RECOMPRESS)
1203 write_flags |= WIMLIB_WRITE_FLAG_RECOMPRESS;
1204 status = rebuild_wim(wimfs_ctx, write_flags,
1208 DEBUG("Read-only mount");
1213 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1214 ret = delete_staging_dir(wimfs_ctx);
1216 ERROR("Failed to delete the staging directory");
1221 wimfs_ctx->status = status;
1222 wimfs_ctx->have_status = true;
1223 return MSG_BREAK_LOOP;
1227 msg_daemon_info_handler(const void *_msg, void *_handler_ctx)
1229 const struct msg_daemon_info *msg = _msg;
1230 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1232 DEBUG("Handling daemon info msg");
1233 if (msg->hdr.msg_size < sizeof(*msg))
1234 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1235 handler_ctx->daemon_pid = msg->daemon_pid;
1236 handler_ctx->mount_flags = msg->mount_flags;
1237 handler_ctx->hdr.timeout_seconds = 1;
1238 DEBUG("pid of daemon is %d; mount flags were %#x",
1239 handler_ctx->daemon_pid,
1240 handler_ctx->mount_flags);
1245 msg_write_streams_progress_handler(const void *_msg, void *_handler_ctx)
1247 const struct msg_write_streams_progress *msg = _msg;
1248 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1250 if (msg->hdr.msg_size < sizeof(*msg))
1251 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1252 if (handler_ctx->progress_func) {
1253 handler_ctx->progress_func(WIMLIB_PROGRESS_MSG_WRITE_STREAMS,
1260 msg_unmount_finished_handler(const void *_msg, void *_handler_ctx)
1262 const struct msg_unmount_finished *msg = _msg;
1263 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1265 DEBUG("Handling unmount finished message");
1266 if (msg->hdr.msg_size < sizeof(*msg))
1267 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1268 handler_ctx->status = msg->status;
1269 DEBUG("status is %d", handler_ctx->status);
1270 return MSG_BREAK_LOOP;
1274 unmount_timed_out_cb(void *_handler_ctx)
1276 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1278 if (handler_ctx->daemon_pid == 0) {
1281 kill(handler_ctx->daemon_pid, 0);
1282 if (errno == ESRCH) {
1285 DEBUG("Filesystem daemon is still alive... "
1286 "Waiting another %d seconds\n",
1287 handler_ctx->hdr.timeout_seconds);
1292 ERROR("The filesystem daemon has crashed! Changes to the "
1293 "WIM may not have been commited.");
1294 return WIMLIB_ERR_FILESYSTEM_DAEMON_CRASHED;
1298 daemon_timed_out_cb(void *_handler_ctx)
1300 ERROR("Timed out waiting for unmount request! "
1301 "Changes to the mounted WIM will not be committed.");
1302 return WIMLIB_ERR_TIMEOUT;
1305 typedef int (*msg_handler_t)(const void *_msg, void *_handler_ctx);
1307 struct msg_handler_callbacks {
1308 int (*timed_out)(void * _handler_ctx);
1309 msg_handler_t msg_handlers[MSG_TYPE_MAX];
1312 static const struct msg_handler_callbacks unmount_msg_handler_callbacks = {
1313 .timed_out = unmount_timed_out_cb,
1315 [MSG_TYPE_DAEMON_INFO] = msg_daemon_info_handler,
1316 [MSG_TYPE_WRITE_STREAMS_PROGRESS] = msg_write_streams_progress_handler,
1317 [MSG_TYPE_UNMOUNT_FINISHED] = msg_unmount_finished_handler,
1321 static const struct msg_handler_callbacks daemon_msg_handler_callbacks = {
1322 .timed_out = daemon_timed_out_cb,
1324 [MSG_TYPE_UNMOUNT_REQUEST] = msg_unmount_request_handler,
1329 receive_message(mqd_t mq,
1330 struct msg_handler_context_hdr *handler_ctx,
1331 const msg_handler_t msg_handlers[],
1332 long mailbox_size, void *mailbox)
1335 struct timespec timeout;
1336 ssize_t bytes_received;
1337 struct unmount_msg_hdr *hdr;
1340 gettimeofday(&now, NULL);
1341 timeout.tv_sec = now.tv_sec + handler_ctx->timeout_seconds;
1342 timeout.tv_nsec = now.tv_usec * 1000;
1344 bytes_received = mq_timedreceive(mq, mailbox,
1345 mailbox_size, NULL, &timeout);
1347 if (bytes_received == -1) {
1348 if (errno == ETIMEDOUT) {
1349 ret = WIMLIB_ERR_TIMEOUT;
1351 ERROR_WITH_ERRNO("mq_timedreceive()");
1352 ret = WIMLIB_ERR_MQUEUE;
1354 } else if (bytes_received < sizeof(*hdr) ||
1355 bytes_received != hdr->msg_size) {
1356 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1357 } else if (WIMLIB_VERSION_CODE < hdr->min_version) {
1358 /*ERROR("Cannot understand the received message. "*/
1359 /*"Please upgrade wimlib to at least v%d.%d.%d",*/
1360 /*WIMLIB_GET_MAJOR_VERSION(hdr->min_version),*/
1361 /*WIMLIB_GET_MINOR_VERSION(hdr->min_version),*/
1362 /*WIMLIB_GET_PATCH_VERSION(hdr->min_version));*/
1363 ret = MSG_VERSION_TOO_HIGH;
1364 } else if (hdr->msg_type >= MSG_TYPE_MAX) {
1365 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1366 } else if (msg_handlers[hdr->msg_type] == NULL) {
1367 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1369 ret = msg_handlers[hdr->msg_type](mailbox, handler_ctx);
1375 message_loop(mqd_t mq,
1376 const struct msg_handler_callbacks *callbacks,
1377 struct msg_handler_context_hdr *handler_ctx)
1379 static const size_t MAX_MSG_SIZE = 512;
1384 DEBUG("Entering message loop");
1386 ret = get_mailbox(mq, MAX_MSG_SIZE, &msgsize, &mailbox);
1390 ret = receive_message(mq, handler_ctx,
1391 callbacks->msg_handlers,
1393 if (ret == 0 || ret == MSG_VERSION_TOO_HIGH) {
1395 } else if (ret == MSG_BREAK_LOOP) {
1398 } else if (ret == WIMLIB_ERR_TIMEOUT) {
1399 if (callbacks->timed_out)
1400 ret = callbacks->timed_out(handler_ctx);
1406 ERROR_WITH_ERRNO("Error communicating with "
1407 "filesystem daemon");
1412 DEBUG("Exiting message loop");
1416 /* Execute `fusermount -u', which is installed setuid root, to unmount the WIM.
1418 * FUSE does not yet implement synchronous unmounts. This means that fusermount
1419 * -u will return before the filesystem daemon returns from wimfs_destroy().
1420 * This is partly what we want, because we need to send a message from this
1421 * process to the filesystem daemon telling whether --commit was specified or
1422 * not. However, after that, the unmount process must wait for the filesystem
1423 * daemon to finish writing the WIM file.
1426 execute_fusermount(const char *dir)
1434 ERROR_WITH_ERRNO("Failed to fork()");
1435 return WIMLIB_ERR_FORK;
1439 execlp("fusermount", "fusermount", "-u", dir, NULL);
1440 ERROR_WITH_ERRNO("Failed to execute `fusermount'");
1441 exit(WIMLIB_ERR_FUSERMOUNT);
1445 ret = waitpid(pid, &status, 0);
1447 ERROR_WITH_ERRNO("Failed to wait for fusermount process to "
1449 return WIMLIB_ERR_FUSERMOUNT;
1452 if (!WIFEXITED(status)) {
1453 ERROR("'fusermount' did not terminate normally!");
1454 return WIMLIB_ERR_FUSERMOUNT;
1457 status = WEXITSTATUS(status);
1462 if (status != WIMLIB_ERR_FUSERMOUNT)
1463 return WIMLIB_ERR_FUSERMOUNT;
1465 /* Try again, but with the `umount' program. This is required on other
1466 * FUSE implementations such as FreeBSD's that do not have a
1467 * `fusermount' program. */
1468 ERROR("Falling back to 'umount'. Note: you may need to be "
1469 "root for this to work");
1472 ERROR_WITH_ERRNO("Failed to fork()");
1473 return WIMLIB_ERR_FORK;
1477 execlp("umount", "umount", dir, NULL);
1478 ERROR_WITH_ERRNO("Failed to execute `umount'");
1479 exit(WIMLIB_ERR_FUSERMOUNT);
1483 ret = waitpid(pid, &status, 0);
1485 ERROR_WITH_ERRNO("Failed to wait for `umount' process to "
1487 return WIMLIB_ERR_FUSERMOUNT;
1490 ERROR("`umount' did not successfully complete");
1491 return WIMLIB_ERR_FUSERMOUNT;
1497 static int wimfs_access(const char *path, int mask)
1504 wimfs_chmod(const char *path, mode_t mask)
1506 struct wim_dentry *dentry;
1507 struct wimfs_context *ctx = wimfs_get_context();
1510 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1513 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1514 &dentry, NULL, NULL);
1518 ret = inode_set_unix_data(dentry->d_inode, ctx->default_uid,
1519 ctx->default_gid, mask,
1520 ctx->wim->lookup_table, UNIX_DATA_MODE);
1521 return ret ? -ENOMEM : 0;
1525 wimfs_chown(const char *path, uid_t uid, gid_t gid)
1527 struct wim_dentry *dentry;
1528 struct wimfs_context *ctx = wimfs_get_context();
1531 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1534 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1535 &dentry, NULL, NULL);
1539 ret = inode_set_unix_data(dentry->d_inode, uid, gid,
1540 inode_default_unix_mode(dentry->d_inode),
1541 ctx->wim->lookup_table,
1542 UNIX_DATA_UID | UNIX_DATA_GID);
1543 return ret ? -ENOMEM : 0;
1546 /* Called when the filesystem is unmounted. */
1548 wimfs_destroy(void *p)
1550 struct wimfs_context *wimfs_ctx = wimfs_get_context();
1551 if (open_message_queues(wimfs_ctx, true) == 0) {
1552 struct daemon_msg_handler_context handler_ctx = {
1554 .timeout_seconds = 5,
1556 .wimfs_ctx = wimfs_ctx,
1558 message_loop(wimfs_ctx->unmount_to_daemon_mq,
1559 &daemon_msg_handler_callbacks,
1565 static int wimfs_fallocate(const char *path, int mode,
1566 off_t offset, off_t len, struct fuse_file_info *fi)
1568 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1569 wimlib_assert(fd->staging_fd != -1);
1570 return fallocate(fd->staging_fd, mode, offset, len);
1576 wimfs_fgetattr(const char *path, struct stat *stbuf,
1577 struct fuse_file_info *fi)
1579 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1580 return inode_to_stbuf(fd->f_inode, fd->f_lte, stbuf);
1584 wimfs_ftruncate(const char *path, off_t size, struct fuse_file_info *fi)
1586 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1587 int ret = ftruncate(fd->staging_fd, size);
1590 touch_inode(fd->f_inode);
1591 fd->f_lte->resource_entry.original_size = size;
1596 * Fills in a `struct stat' that corresponds to a file or directory in the WIM.
1599 wimfs_getattr(const char *path, struct stat *stbuf)
1601 struct wim_dentry *dentry;
1602 struct wim_lookup_table_entry *lte;
1604 struct wimfs_context *ctx = wimfs_get_context();
1606 ret = lookup_resource(ctx->wim, path,
1607 get_lookup_flags(ctx) | LOOKUP_FLAG_DIRECTORY_OK,
1608 &dentry, <e, NULL);
1611 return inode_to_stbuf(dentry->d_inode, lte, stbuf);
1615 /* Read an alternate data stream through the XATTR interface, or get its size */
1617 wimfs_getxattr(const char *path, const char *name, char *value,
1621 struct wim_inode *inode;
1622 struct wim_ads_entry *ads_entry;
1624 struct wim_lookup_table_entry *lte;
1625 struct wimfs_context *ctx = wimfs_get_context();
1627 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1630 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
1634 inode = wim_pathname_to_inode(ctx->wim, path);
1638 ads_entry = inode_get_ads_entry(inode, name, NULL);
1642 lte = ads_entry->lte;
1643 res_size = wim_resource_size(lte);
1648 if (res_size > size)
1651 ret = read_full_resource_into_buf(lte, value, true);
1659 /* Create a hard link */
1661 wimfs_link(const char *to, const char *from)
1663 struct wim_dentry *from_dentry, *from_dentry_parent;
1664 const char *link_name;
1665 struct wim_inode *inode;
1666 WIMStruct *w = wimfs_get_WIMStruct();
1669 inode = wim_pathname_to_inode(w, to);
1673 if (inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
1674 FILE_ATTRIBUTE_REPARSE_POINT))
1677 from_dentry_parent = get_parent_dentry(w, from);
1678 if (!from_dentry_parent)
1680 if (!dentry_is_directory(from_dentry_parent))
1683 link_name = path_basename(from);
1684 if (get_dentry_child_with_name(from_dentry_parent, link_name))
1687 ret = new_dentry(link_name, &from_dentry);
1692 inode_ref_streams(inode);
1693 from_dentry->d_inode = inode;
1694 inode_add_dentry(from_dentry, inode);
1695 dentry_add_child(from_dentry_parent, from_dentry);
1701 wimfs_listxattr(const char *path, char *list, size_t size)
1704 struct wim_inode *inode;
1705 struct wimfs_context *ctx = wimfs_get_context();
1708 bool size_only = (size == 0);
1710 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1713 /* List alternate data streams, or get the list size */
1715 inode = wim_pathname_to_inode(ctx->wim, path);
1720 for (i = 0; i < inode->i_num_ads; i++) {
1721 char *stream_name_mbs;
1722 size_t stream_name_mbs_nbytes;
1725 ret = utf16le_to_tstr(inode->i_ads_entries[i].stream_name,
1726 inode->i_ads_entries[i].stream_name_nbytes,
1728 &stream_name_mbs_nbytes);
1732 needed_size = stream_name_mbs_nbytes + 6;
1734 if (needed_size > size) {
1735 FREE(stream_name_mbs);
1738 sprintf(p, "user.%s", stream_name_mbs);
1739 size -= needed_size;
1742 FREE(stream_name_mbs);
1749 /* Create a directory in the WIM image. */
1751 wimfs_mkdir(const char *path, mode_t mode)
1753 return create_dentry(fuse_get_context(), path, mode | S_IFDIR,
1754 FILE_ATTRIBUTE_DIRECTORY, NULL);
1757 /* Create a regular file or alternate data stream in the WIM image. */
1759 wimfs_mknod(const char *path, mode_t mode, dev_t rdev)
1761 const char *stream_name;
1762 struct fuse_context *fuse_ctx = fuse_get_context();
1763 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
1768 if ((wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
1769 && (stream_name = path_stream_name(path))) {
1770 /* Make an alternate data stream */
1771 struct wim_ads_entry *new_entry;
1772 struct wim_inode *inode;
1774 char *p = (char*)stream_name - 1;
1775 wimlib_assert(*p == ':');
1778 inode = wim_pathname_to_inode(wimfs_ctx->wim, path);
1781 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)
1783 if (inode_get_ads_entry(inode, stream_name, NULL))
1785 new_entry = inode_add_ads(inode, stream_name);
1790 /* Make a normal file (not an alternate data stream) */
1791 return create_dentry(fuse_ctx, path, mode | S_IFREG,
1792 FILE_ATTRIBUTE_NORMAL, NULL);
1798 wimfs_open(const char *path, struct fuse_file_info *fi)
1800 struct wim_dentry *dentry;
1801 struct wim_lookup_table_entry *lte;
1803 struct wimfs_fd *fd;
1804 struct wim_inode *inode;
1807 struct wimfs_context *ctx = wimfs_get_context();
1808 struct wim_lookup_table_entry **back_ptr;
1810 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
1811 &dentry, <e, &stream_idx);
1815 inode = dentry->d_inode;
1817 if (stream_idx == 0) {
1819 back_ptr = &inode->i_lte;
1821 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
1822 back_ptr = &inode->i_ads_entries[stream_idx - 1].lte;
1825 /* The file resource may be in the staging directory (read-write mounts
1826 * only) or in the WIM. If it's in the staging directory, we need to
1827 * open a native file descriptor for the corresponding file. Otherwise,
1828 * we can read the file resource directly from the WIM file if we are
1829 * opening it read-only, but we need to extract the resource to the
1830 * staging directory if we are opening it writable. */
1832 if (flags_writable(fi->flags) &&
1833 (!lte || lte->resource_location != RESOURCE_IN_STAGING_FILE)) {
1834 u64 size = (lte) ? wim_resource_size(lte) : 0;
1835 ret = extract_resource_to_staging_dir(inode, stream_id,
1841 print_lookup_table_entry(lte, stderr);
1843 ret = alloc_wimfs_fd(inode, stream_id, lte, &fd,
1844 wimfs_ctx_readonly(ctx));
1848 if (lte && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
1849 fd->staging_fd = open(lte->staging_file_name, fi->flags);
1850 if (fd->staging_fd == -1) {
1851 int errno_save = errno;
1856 fi->fh = (uintptr_t)fd;
1860 /* Opens a directory. */
1862 wimfs_opendir(const char *path, struct fuse_file_info *fi)
1864 struct wim_inode *inode;
1866 struct wimfs_fd *fd = NULL;
1867 struct wimfs_context *ctx = wimfs_get_context();
1868 WIMStruct *w = ctx->wim;
1870 inode = wim_pathname_to_inode(w, path);
1873 if (!inode_is_directory(inode))
1875 ret = alloc_wimfs_fd(inode, 0, NULL, &fd, wimfs_ctx_readonly(ctx));
1876 fi->fh = (uintptr_t)fd;
1882 * Read data from a file in the WIM or in the staging directory.
1885 wimfs_read(const char *path, char *buf, size_t size,
1886 off_t offset, struct fuse_file_info *fi)
1888 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1895 if (!fd->f_lte) /* Empty stream with no lookup table entry */
1898 res_size = wim_resource_size(fd->f_lte);
1899 if (offset > res_size)
1901 size = min(size, INT_MAX);
1902 size = min(size, res_size - offset);
1904 switch (fd->f_lte->resource_location) {
1905 case RESOURCE_IN_STAGING_FILE:
1906 ret = pread(fd->staging_fd, buf, size, offset);
1910 case RESOURCE_IN_WIM:
1911 if (read_partial_wim_resource_into_buf(fd->f_lte, size,
1916 case RESOURCE_IN_ATTACHED_BUFFER:
1917 memcpy(buf, fd->f_lte->attached_buffer + offset, size);
1921 ERROR("Invalid resource location");
1928 struct fill_params {
1930 fuse_fill_dir_t filler;
1934 dentry_fuse_fill(struct wim_dentry *dentry, void *arg)
1936 struct fill_params *fill_params = arg;
1938 char *file_name_mbs;
1939 size_t file_name_mbs_nbytes;
1942 ret = utf16le_to_tstr(dentry->file_name,
1943 dentry->file_name_nbytes,
1945 &file_name_mbs_nbytes);
1949 ret = fill_params->filler(fill_params->buf, file_name_mbs, NULL, 0);
1950 FREE(file_name_mbs);
1954 /* Fills in the entries of the directory specified by @path using the
1955 * FUSE-provided function @filler. */
1957 wimfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
1958 off_t offset, struct fuse_file_info *fi)
1960 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1961 struct wim_inode *inode;
1966 inode = fd->f_inode;
1968 struct fill_params fill_params = {
1973 filler(buf, ".", NULL, 0);
1974 filler(buf, "..", NULL, 0);
1976 return for_dentry_in_rbtree(inode->i_children.rb_node,
1977 dentry_fuse_fill, &fill_params);
1982 wimfs_readlink(const char *path, char *buf, size_t buf_len)
1984 struct wimfs_context *ctx = wimfs_get_context();
1985 struct wim_inode *inode = wim_pathname_to_inode(ctx->wim, path);
1989 if (!inode_is_symlink(inode))
1992 ret = inode_readlink(inode, buf, buf_len, ctx->wim, true);
2000 wimfs_release(const char *path, struct fuse_file_info *fi)
2002 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2003 return close_wimfs_fd(fd);
2006 /* Close a directory */
2008 wimfs_releasedir(const char *path, struct fuse_file_info *fi)
2010 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2011 return close_wimfs_fd(fd);
2015 /* Remove an alternate data stream through the XATTR interface */
2017 wimfs_removexattr(const char *path, const char *name)
2019 struct wim_inode *inode;
2020 struct wim_ads_entry *ads_entry;
2022 struct wimfs_context *ctx = wimfs_get_context();
2024 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2027 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2031 inode = wim_pathname_to_inode(ctx->wim, path);
2035 ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2038 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2043 /* Renames a file or directory. See rename (3) */
2045 wimfs_rename(const char *from, const char *to)
2047 struct wim_dentry *src;
2048 struct wim_dentry *dst;
2049 struct wim_dentry *parent_of_dst;
2050 WIMStruct *w = wimfs_get_WIMStruct();
2053 /* This rename() implementation currently only supports actual files
2054 * (not alternate data streams) */
2056 src = get_dentry(w, from);
2060 dst = get_dentry(w, to);
2063 /* Destination file exists */
2065 if (src == dst) /* Same file */
2068 if (!dentry_is_directory(src)) {
2069 /* Cannot rename non-directory to directory. */
2070 if (dentry_is_directory(dst))
2073 /* Cannot rename directory to a non-directory or a non-empty
2075 if (!dentry_is_directory(dst))
2077 if (inode_has_children(dst->d_inode))
2080 parent_of_dst = dst->parent;
2082 /* Destination does not exist */
2083 parent_of_dst = get_parent_dentry(w, to);
2087 if (!dentry_is_directory(parent_of_dst))
2091 ret = set_dentry_name(src, path_basename(to));
2095 remove_dentry(dst, w->lookup_table);
2097 dentry_add_child(parent_of_dst, src);
2101 /* Remove a directory */
2103 wimfs_rmdir(const char *path)
2105 struct wim_dentry *dentry;
2106 WIMStruct *w = wimfs_get_WIMStruct();
2108 dentry = get_dentry(w, path);
2112 if (!dentry_is_directory(dentry))
2115 if (dentry_has_children(dentry))
2118 remove_dentry(dentry, w->lookup_table);
2123 /* Write an alternate data stream through the XATTR interface */
2125 wimfs_setxattr(const char *path, const char *name,
2126 const char *value, size_t size, int flags)
2128 struct wim_ads_entry *existing_ads_entry;
2129 struct wim_inode *inode;
2131 struct wimfs_context *ctx = wimfs_get_context();
2134 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2137 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2141 inode = wim_pathname_to_inode(ctx->wim, path);
2145 existing_ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2146 if (existing_ads_entry) {
2147 if (flags & XATTR_CREATE)
2150 if (flags & XATTR_REPLACE)
2154 ret = inode_add_ads_with_data(inode, name, value,
2155 size, ctx->wim->lookup_table);
2157 if (existing_ads_entry)
2158 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2167 wimfs_symlink(const char *to, const char *from)
2169 struct fuse_context *fuse_ctx = fuse_get_context();
2170 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
2171 struct wim_dentry *dentry;
2174 ret = create_dentry(fuse_ctx, from, S_IFLNK | 0777,
2175 FILE_ATTRIBUTE_REPARSE_POINT, &dentry);
2177 dentry->d_inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
2178 if (inode_set_symlink(dentry->d_inode, to,
2179 wimfs_ctx->wim->lookup_table, NULL))
2181 remove_dentry(dentry, wimfs_ctx->wim->lookup_table);
2189 /* Reduce the size of a file */
2191 wimfs_truncate(const char *path, off_t size)
2193 struct wim_dentry *dentry;
2194 struct wim_lookup_table_entry *lte;
2198 struct wim_inode *inode;
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 (lte == NULL && size == 0)
2210 if (lte->resource_location == RESOURCE_IN_STAGING_FILE) {
2211 ret = truncate(lte->staging_file_name, size);
2215 lte->resource_entry.original_size = size;
2217 /* File in WIM. Extract it to the staging directory, but only
2218 * the first @size bytes of it. */
2219 inode = dentry->d_inode;
2220 if (stream_idx == 0)
2223 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
2224 ret = extract_resource_to_staging_dir(inode, stream_id,
2230 /* Unlink a non-directory or alternate data stream */
2232 wimfs_unlink(const char *path)
2234 struct wim_dentry *dentry;
2235 struct wim_lookup_table_entry *lte;
2238 struct wimfs_context *ctx = wimfs_get_context();
2240 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
2241 &dentry, <e, &stream_idx);
2246 if (stream_idx == 0)
2247 remove_dentry(dentry, ctx->wim->lookup_table);
2249 inode_remove_ads(dentry->d_inode, stream_idx - 1,
2250 ctx->wim->lookup_table);
2254 #ifdef HAVE_UTIMENSAT
2256 * Change the timestamp on a file dentry.
2258 * Note that alternate data streams do not have their own timestamps.
2261 wimfs_utimens(const char *path, const struct timespec tv[2])
2263 struct wim_dentry *dentry;
2264 struct wim_inode *inode;
2265 WIMStruct *w = wimfs_get_WIMStruct();
2267 dentry = get_dentry(w, path);
2270 inode = dentry->d_inode;
2272 if (tv[0].tv_nsec != UTIME_OMIT) {
2273 if (tv[0].tv_nsec == UTIME_NOW)
2274 inode->i_last_access_time = get_wim_timestamp();
2276 inode->i_last_access_time = timespec_to_wim_timestamp(tv[0]);
2278 if (tv[1].tv_nsec != UTIME_OMIT) {
2279 if (tv[1].tv_nsec == UTIME_NOW)
2280 inode->i_last_write_time = get_wim_timestamp();
2282 inode->i_last_write_time = timespec_to_wim_timestamp(tv[1]);
2286 #else /* HAVE_UTIMENSAT */
2288 wimfs_utime(const char *path, struct utimbuf *times)
2290 struct wim_dentry *dentry;
2291 struct wim_inode *inode;
2292 WIMStruct *w = wimfs_get_WIMStruct();
2294 dentry = get_dentry(w, path);
2297 inode = dentry->d_inode;
2299 inode->i_last_write_time = unix_timestamp_to_wim(times->modtime);
2300 inode->i_last_access_time = unix_timestamp_to_wim(times->actime);
2303 #endif /* !HAVE_UTIMENSAT */
2305 /* Writes to a file in the WIM filesystem.
2306 * It may be an alternate data stream, but here we don't even notice because we
2307 * just get a lookup table entry. */
2309 wimfs_write(const char *path, const char *buf, size_t size,
2310 off_t offset, struct fuse_file_info *fi)
2312 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2318 wimlib_assert(fd->f_lte != NULL);
2319 wimlib_assert(fd->f_lte->staging_file_name != NULL);
2320 wimlib_assert(fd->staging_fd != -1);
2321 wimlib_assert(fd->f_inode != NULL);
2323 /* Write the data. */
2324 ret = pwrite(fd->staging_fd, buf, size, offset);
2328 /* Update file size */
2329 if (offset + size > fd->f_lte->resource_entry.original_size) {
2330 DEBUG("Update file size %"PRIu64 " => %"PRIu64"",
2331 fd->f_lte->resource_entry.original_size,
2333 fd->f_lte->resource_entry.original_size = offset + size;
2336 /* Update timestamps */
2337 touch_inode(fd->f_inode);
2341 static struct fuse_operations wimfs_operations = {
2343 .access = wimfs_access,
2345 .chmod = wimfs_chmod,
2346 .chown = wimfs_chown,
2347 .destroy = wimfs_destroy,
2349 .fallocate = wimfs_fallocate,
2351 .fgetattr = wimfs_fgetattr,
2352 .ftruncate = wimfs_ftruncate,
2353 .getattr = wimfs_getattr,
2355 .getxattr = wimfs_getxattr,
2359 .listxattr = wimfs_listxattr,
2361 .mkdir = wimfs_mkdir,
2362 .mknod = wimfs_mknod,
2364 .opendir = wimfs_opendir,
2366 .readdir = wimfs_readdir,
2367 .readlink = wimfs_readlink,
2368 .release = wimfs_release,
2369 .releasedir = wimfs_releasedir,
2371 .removexattr = wimfs_removexattr,
2373 .rename = wimfs_rename,
2374 .rmdir = wimfs_rmdir,
2376 .setxattr = wimfs_setxattr,
2378 .symlink = wimfs_symlink,
2379 .truncate = wimfs_truncate,
2380 .unlink = wimfs_unlink,
2381 #ifdef HAVE_UTIMENSAT
2382 .utimens = wimfs_utimens,
2384 .utime = wimfs_utime,
2386 .write = wimfs_write,
2388 /* wimfs keeps file descriptor structures (struct wimfs_fd), so there is
2389 * no need to have the file path provided on operations such as read()
2390 * where only the file descriptor is needed. */
2391 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2392 .flag_nullpath_ok = 1,
2394 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 9)
2396 .flag_utime_omit_ok = 1,
2401 /* Mounts an image from a WIM file. */
2403 wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
2404 int mount_flags, WIMStruct **additional_swms,
2405 unsigned num_additional_swms,
2406 const char *staging_dir)
2412 struct wim_lookup_table *joined_tab, *wim_tab_save;
2413 struct wim_image_metadata *imd;
2414 struct wimfs_context ctx;
2415 struct wim_inode *inode;
2417 DEBUG("Mount: wim = %p, image = %d, dir = %s, flags = %d, ",
2418 wim, image, dir, mount_flags);
2421 return WIMLIB_ERR_INVALID_PARAM;
2423 ret = verify_swm_set(wim, additional_swms, num_additional_swms);
2427 if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) && (wim->hdr.total_parts != 1)) {
2428 ERROR("Cannot mount a split WIM read-write");
2429 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
2432 if (num_additional_swms) {
2433 ret = new_joined_lookup_table(wim, additional_swms,
2434 num_additional_swms,
2438 wim_tab_save = wim->lookup_table;
2439 wim->lookup_table = joined_tab;
2442 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2443 ret = wim_run_full_verifications(wim);
2448 ret = wim_checksum_unhashed_streams(wim);
2452 ret = select_wim_image(wim, image);
2456 DEBUG("Selected image %d", image);
2458 imd = wim_get_current_image_metadata(wim);
2460 if (imd->refcnt != 1) {
2461 ERROR("Cannot mount image that was just exported with "
2462 "wimlib_export_image()");
2463 ret = WIMLIB_ERR_INVALID_PARAM;
2467 if (imd->modified) {
2468 ERROR("Cannot mount image that was added "
2469 "with wimlib_add_image()");
2470 ret = WIMLIB_ERR_INVALID_PARAM;
2474 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2475 ret = lock_wim(wim, wim->fp);
2480 /* Use default stream interface if one was not specified */
2481 if (!(mount_flags & (WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_NONE |
2482 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR |
2483 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)))
2484 mount_flags |= WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR;
2486 DEBUG("Initializing struct wimfs_context");
2487 init_wimfs_context(&ctx);
2489 ctx.mount_flags = mount_flags;
2490 ctx.image_inode_list = &imd->inode_list;
2491 ctx.default_uid = getuid();
2492 ctx.default_gid = getgid();
2493 wimlib_assert(list_empty(&imd->unhashed_streams));
2494 ctx.wim->lookup_table->unhashed_streams = &imd->unhashed_streams;
2495 if (mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
2496 ctx.default_lookup_flags = LOOKUP_FLAG_ADS_OK;
2498 DEBUG("Unlinking message queues in case they already exist");
2499 ret = set_message_queue_names(&ctx, dir);
2502 unlink_message_queues(&ctx);
2504 DEBUG("Preparing arguments to fuse_main()");
2506 dir_copy = STRDUP(dir);
2508 goto out_free_message_queue_names;
2511 argv[argc++] = "imagex";
2512 argv[argc++] = dir_copy;
2514 /* disable multi-threaded operation for read-write mounts */
2515 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)
2516 argv[argc++] = "-s";
2518 if (mount_flags & WIMLIB_MOUNT_FLAG_DEBUG)
2519 argv[argc++] = "-d";
2522 * We provide the use_ino option to the FUSE mount because we are going
2523 * to assign inode numbers ourselves. */
2524 char optstring[256] =
2528 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2531 ",default_permissions"
2533 argv[argc++] = "-o";
2534 argv[argc++] = optstring;
2535 if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)) {
2536 /* Read-write mount. Make the staging directory */
2537 ret = make_staging_dir(&ctx, staging_dir);
2539 goto out_free_dir_copy;
2541 /* Read-only mount */
2542 strcat(optstring, ",ro");
2544 if (mount_flags & WIMLIB_MOUNT_FLAG_ALLOW_OTHER)
2545 strcat(optstring, ",allow_other");
2551 DEBUG("FUSE command line (argc = %d): ", argc);
2552 for (i = 0; i < argc; i++) {
2553 fputs(argv[i], stdout);
2561 /* Mark dentry tree as modified if read-write mount. */
2562 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2564 imd->has_been_mounted_rw = 1;
2567 /* Resolve the lookup table entries for every inode in the image, and
2568 * assign inode numbers */
2569 DEBUG("Resolving lookup table entries and assigning inode numbers");
2571 image_for_each_inode(inode, imd) {
2572 inode_resolve_ltes(inode, wim->lookup_table);
2573 inode->i_ino = ctx.next_ino++;
2575 DEBUG("(next_ino = %"PRIu64")", ctx.next_ino);
2577 DEBUG("Calling fuse_main()");
2579 ret = fuse_main(argc, argv, &wimfs_operations, &ctx);
2581 DEBUG("Returned from fuse_main() (ret = %d)", ret);
2584 ret = WIMLIB_ERR_FUSE;
2586 if (ctx.have_status)
2589 ret = WIMLIB_ERR_TIMEOUT;
2591 if (ctx.daemon_to_unmount_mq != (mqd_t)(-1)) {
2592 send_unmount_finished_msg(ctx.daemon_to_unmount_mq, ret);
2593 close_message_queues(&ctx);
2596 /* Try to delete the staging directory if a deletion wasn't yet
2597 * attempted due to an earlier error */
2598 if (ctx.staging_dir_name)
2599 delete_staging_dir(&ctx);
2603 wim->wim_locked = 0;
2604 out_free_message_queue_names:
2605 free_message_queue_names(&ctx);
2607 if (num_additional_swms) {
2608 free_lookup_table(wim->lookup_table);
2609 wim->lookup_table = wim_tab_save;
2615 * Unmounts the WIM file that was previously mounted on @dir by using
2616 * wimlib_mount_image().
2619 wimlib_unmount_image(const char *dir, int unmount_flags,
2620 wimlib_progress_func_t progress_func)
2623 struct wimfs_context wimfs_ctx;
2625 init_wimfs_context(&wimfs_ctx);
2627 ret = set_message_queue_names(&wimfs_ctx, dir);
2631 ret = open_message_queues(&wimfs_ctx, false);
2633 goto out_free_message_queue_names;
2635 ret = send_unmount_request_msg(wimfs_ctx.unmount_to_daemon_mq,
2637 progress_func != NULL);
2639 goto out_close_message_queues;
2641 ret = execute_fusermount(dir);
2643 goto out_close_message_queues;
2645 struct unmount_msg_handler_context handler_ctx = {
2647 .timeout_seconds = 5,
2650 .progress_func = progress_func,
2653 ret = message_loop(wimfs_ctx.daemon_to_unmount_mq,
2654 &unmount_msg_handler_callbacks,
2657 ret = handler_ctx.status;
2658 out_close_message_queues:
2659 close_message_queues(&wimfs_ctx);
2660 out_free_message_queue_names:
2661 free_message_queue_names(&wimfs_ctx);
2666 #else /* WITH_FUSE */
2670 mount_unsupported_error()
2672 #if defined(__WIN32__)
2673 ERROR("Sorry-- Mounting WIM images is not supported on Windows!");
2675 ERROR("wimlib was compiled with --without-fuse, which disables support "
2676 "for mounting WIMs.");
2678 return WIMLIB_ERR_UNSUPPORTED;
2682 wimlib_unmount_image(const tchar *dir, int unmount_flags,
2683 wimlib_progress_func_t progress_func)
2685 return mount_unsupported_error();
2689 wimlib_mount_image(WIMStruct *wim, int image, const tchar *dir,
2690 int mount_flags, WIMStruct **additional_swms,
2691 unsigned num_additional_swms,
2692 const tchar *staging_dir)
2694 return mount_unsupported_error();
2697 #endif /* !WITH_FUSE */