4 * This file implements mounting of WIM files using FUSE, which stands for
5 * Filesystem in Userspace. FUSE allows a filesystem to be implemented in a
6 * userspace process by implementing the filesystem primitives--- read(),
7 * write(), readdir(), etc.
11 * Copyright (C) 2012, 2013 Eric Biggers
13 * This file is part of wimlib, a library for working with WIM files.
15 * wimlib is free software; you can redistribute it and/or modify it under the
16 * terms of the GNU General Public License as published by the Free
17 * Software Foundation; either version 3 of the License, or (at your option)
20 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
21 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
22 * A PARTICULAR PURPOSE. See the GNU General Public License for more
25 * You should have received a copy of the GNU General Public License
26 * along with wimlib; if not, see http://www.gnu.org/licenses/.
34 #include "wimlib/error.h"
39 # error "FUSE mount not supported on Win32! Please configure --without-fuse"
42 #include "wimlib/encoding.h"
43 #include "wimlib/file_io.h"
44 #include "wimlib/dentry.h"
45 #include "wimlib/inode.h"
46 #include "wimlib/lookup_table.h"
47 #include "wimlib/metadata.h"
48 #include "wimlib/paths.h"
49 #include "wimlib/reparse.h"
50 #include "wimlib/resource.h"
51 #include "wimlib/timestamp.h"
52 #include "wimlib/version.h"
53 #include "wimlib/write.h"
54 #include "wimlib/xml.h"
65 #include <sys/types.h>
70 #define FUSE_USE_VERSION 26
74 #include <attr/xattr.h>
77 #define MSG_VERSION_TOO_HIGH -1
78 #define MSG_BREAK_LOOP -2
80 /* File descriptor to a file open on the WIM filesystem. */
82 struct wim_inode *f_inode;
83 struct wim_lookup_table_entry *f_lte;
84 struct filedes staging_fd;
89 struct wimfs_context {
90 /* The WIMStruct for the mounted WIM. */
93 /* Name of the staging directory for a read-write mount. Whenever a new file is
94 * created, it is done so in the staging directory. Furthermore, whenever a
95 * file in the WIM is modified, it is extracted to the staging directory. If
96 * changes are commited when the WIM is unmounted, the file resources are merged
97 * in from the staging directory when writing the new WIM. */
98 char *staging_dir_name;
99 size_t staging_dir_name_len;
101 /* Flags passed to wimlib_mount(). */
104 /* Default flags to use when looking up a WIM dentry (depends on whether
105 * the Windows interface to alternate data streams is being used or
107 int default_lookup_flags;
109 /* Next inode number to be assigned. Note: I didn't bother with a
110 * bitmap of free inode numbers since this isn't even a "real"
111 * filesystem anyway. */
114 /* List of inodes in the mounted image */
115 struct list_head *image_inode_list;
117 /* Name and message queue descriptors for message queues between the
118 * filesystem daemon process and the unmount process. These are used
119 * when the filesystem is unmounted and the process running
120 * wimlib_unmount_image() needs to communicate with the filesystem
121 * daemon running fuse_main() (i.e. the process created by a call to
122 * wimlib_mount_image(). */
123 char *unmount_to_daemon_mq_name;
124 char *daemon_to_unmount_mq_name;
125 mqd_t unmount_to_daemon_mq;
126 mqd_t daemon_to_unmount_mq;
136 init_wimfs_context(struct wimfs_context *ctx)
138 memset(ctx, 0, sizeof(*ctx));
139 ctx->unmount_to_daemon_mq = (mqd_t)-1;
140 ctx->daemon_to_unmount_mq = (mqd_t)-1;
143 #define WIMFS_CTX(fuse_ctx) ((struct wimfs_context*)(fuse_ctx)->private_data)
145 static inline struct wimfs_context *
146 wimfs_get_context(void)
148 return WIMFS_CTX(fuse_get_context());
151 static inline WIMStruct *
152 wimfs_get_WIMStruct(void)
154 return wimfs_get_context()->wim;
158 get_lookup_flags(const struct wimfs_context *ctx)
160 return ctx->default_lookup_flags;
163 /* Returns nonzero if write permission is requested on the file open flags */
165 flags_writable(int open_flags)
167 int accmode = (open_flags & O_ACCMODE);
168 return (accmode == O_RDWR || accmode == O_WRONLY);
172 * Allocate a file descriptor for a stream.
174 * @inode: inode containing the stream we're opening
175 * @stream_id: ID of the stream we're opening
176 * @lte: Lookup table entry for the stream (may be NULL)
177 * @fd_ret: Return the allocated file descriptor if successful.
179 * Return 0 iff successful or error code if unsuccessful.
182 alloc_wimfs_fd(struct wim_inode *inode,
184 struct wim_lookup_table_entry *lte,
185 struct wimfs_fd **fd_ret)
187 static const u16 fds_per_alloc = 8;
188 static const u16 max_fds = 0xffff;
191 DEBUG("Allocating fd for stream ID %u from inode %#"PRIx64" "
192 "(open = %u, allocated = %u)",
193 stream_id, inode->i_ino, inode->i_num_opened_fds,
194 inode->i_num_allocated_fds);
196 if (inode->i_num_opened_fds == inode->i_num_allocated_fds) {
197 struct wimfs_fd **fds;
200 if (inode->i_num_allocated_fds == max_fds) {
204 num_new_fds = min(fds_per_alloc,
205 max_fds - inode->i_num_allocated_fds);
207 fds = REALLOC(inode->i_fds,
208 (inode->i_num_allocated_fds + num_new_fds) *
209 sizeof(inode->i_fds[0]));
214 memset(&fds[inode->i_num_allocated_fds], 0,
215 num_new_fds * sizeof(fds[0]));
217 inode->i_num_allocated_fds += num_new_fds;
219 for (u16 i = 0; ; i++) {
220 if (!inode->i_fds[i]) {
221 struct wimfs_fd *fd = CALLOC(1, sizeof(*fd));
228 filedes_invalidate(&fd->staging_fd);
230 fd->stream_id = stream_id;
232 inode->i_fds[i] = fd;
233 inode->i_num_opened_fds++;
235 lte->num_opened_fds++;
236 DEBUG("Allocated fd (idx = %u)", fd->idx);
246 inode_put_fd(struct wim_inode *inode, struct wimfs_fd *fd)
248 wimlib_assert(inode != NULL);
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) {
259 inode->i_num_allocated_fds = 0;
260 if (inode->i_nlink == 0)
266 lte_put_fd(struct wim_lookup_table_entry *lte, struct wimfs_fd *fd)
268 wimlib_assert(fd->f_lte == lte);
270 if (!lte) /* Empty stream with no lookup table entry */
273 /* Close staging file descriptor if needed. */
275 if (lte->resource_location == RESOURCE_IN_STAGING_FILE
276 && filedes_valid(&fd->staging_fd))
278 if (filedes_close(&fd->staging_fd)) {
279 ERROR_WITH_ERRNO("Failed to close staging file");
283 lte_decrement_num_opened_fds(lte);
287 /* Close a file descriptor. */
289 close_wimfs_fd(struct wimfs_fd *fd)
292 DEBUG("Closing fd (ino = %#"PRIx64", opened = %u, allocated = %u)",
293 fd->f_inode->i_ino, fd->f_inode->i_num_opened_fds,
294 fd->f_inode->i_num_allocated_fds);
295 ret = lte_put_fd(fd->f_lte, fd);
299 inode_put_fd(fd->f_inode, fd);
304 fuse_mask_mode(mode_t mode, struct fuse_context *fuse_ctx)
306 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
307 mode &= ~fuse_ctx->umask;
313 * Add a new dentry with a new inode to a WIM image.
315 * Returns 0 on success, or negative error number on failure.
318 create_dentry(struct fuse_context *fuse_ctx, const char *path,
319 mode_t mode, int attributes, struct wim_dentry **dentry_ret)
321 struct wim_dentry *parent;
322 struct wim_dentry *new;
323 const char *basename;
324 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
327 parent = get_parent_dentry(wimfs_ctx->wim, path, WIMLIB_CASE_SENSITIVE);
331 if (!dentry_is_directory(parent))
334 basename = path_basename(path);
335 if (get_dentry_child_with_name(parent, basename, WIMLIB_CASE_SENSITIVE))
338 ret = new_dentry_with_inode(basename, &new);
342 new->d_inode->i_resolved = 1;
343 new->d_inode->i_ino = wimfs_ctx->next_ino++;
344 new->d_inode->i_attributes = attributes;
346 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
347 if (inode_set_unix_data(new->d_inode,
350 fuse_mask_mode(mode, fuse_ctx),
351 wimfs_ctx->wim->lookup_table,
352 UNIX_DATA_ALL | UNIX_DATA_CREATE))
358 dentry_add_child(parent, new);
359 list_add_tail(&new->d_inode->i_list, wimfs_ctx->image_inode_list);
365 static struct wim_inode *
366 wim_pathname_to_inode(WIMStruct *wim, const tchar *path)
368 struct wim_dentry *dentry;
369 dentry = get_dentry(wim, path, WIMLIB_CASE_SENSITIVE);
371 return dentry->d_inode;
376 /* Remove a dentry from a mounted WIM image; i.e. remove an alias for the
377 * corresponding inode.
379 * If there are no remaining references to the inode either through dentries or
380 * open file descriptors, the inode is freed. Otherwise, the inode is not
381 * removed, but the dentry is unlinked and freed.
383 * Either way, all lookup table entries referenced by the inode have their
384 * reference count decremented. If a lookup table entry has no open file
385 * descriptors and no references remaining, it is freed, and the corresponding
386 * staging file is unlinked.
389 remove_dentry(struct wim_dentry *dentry,
390 struct wim_lookup_table *lookup_table)
392 struct wim_inode *inode = dentry->d_inode;
393 struct wim_lookup_table_entry *lte;
396 for (i = 0; i <= inode->i_num_ads; i++) {
397 lte = inode_stream_lte_resolved(inode, i);
399 lte_decrement_refcnt(lte, lookup_table);
401 unlink_dentry(dentry);
406 inode_default_unix_mode(const struct wim_inode *inode)
408 if (inode_is_symlink(inode))
409 return S_IFLNK | 0777;
410 else if (inode_is_directory(inode))
411 return S_IFDIR | 0777;
413 return S_IFREG | 0777;
416 /* Transfers file attributes from a struct wim_inode to a `stat' buffer.
418 * The lookup table entry tells us which stream in the inode we are statting.
419 * For a named data stream, everything returned is the same as the unnamed data
420 * stream except possibly the size and block count. */
422 inode_to_stbuf(const struct wim_inode *inode,
423 const struct wim_lookup_table_entry *lte,
426 const struct wimfs_context *ctx = wimfs_get_context();
428 memset(stbuf, 0, sizeof(struct stat));
429 stbuf->st_mode = inode_default_unix_mode(inode);
430 stbuf->st_uid = ctx->default_uid;
431 stbuf->st_gid = ctx->default_gid;
432 if (ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
433 struct wimlib_unix_data unix_data;
434 if (inode_get_unix_data(inode, &unix_data, NULL) == 0) {
435 stbuf->st_uid = unix_data.uid;
436 stbuf->st_gid = unix_data.gid;
437 stbuf->st_mode = unix_data.mode;
440 stbuf->st_ino = (ino_t)inode->i_ino;
441 stbuf->st_nlink = inode->i_nlink;
443 stbuf->st_size = lte->size;
446 #ifdef HAVE_STAT_NANOSECOND_PRECISION
447 stbuf->st_atim = wim_timestamp_to_timespec(inode->i_last_access_time);
448 stbuf->st_mtim = wim_timestamp_to_timespec(inode->i_last_write_time);
449 stbuf->st_ctim = stbuf->st_mtim;
451 stbuf->st_atime = wim_timestamp_to_unix(inode->i_last_access_time);
452 stbuf->st_mtime = wim_timestamp_to_unix(inode->i_last_write_time);
453 stbuf->st_ctime = stbuf->st_mtime;
455 stbuf->st_blocks = (stbuf->st_size + 511) / 512;
460 touch_inode(struct wim_inode *inode)
462 u64 now = get_wim_timestamp();
463 inode->i_last_access_time = now;
464 inode->i_last_write_time = now;
467 /* Creates a new staging file and returns its file descriptor opened for
470 * @name_ret: A location into which the a pointer to the newly allocated name of
471 * the staging file is stored.
473 * @ctx: Context for the WIM filesystem; this provides the name of the
476 * On success, returns the file descriptor for the staging file, opened for
477 * writing. On failure, returns -1 and sets errno.
480 create_staging_file(char **name_ret, struct wimfs_context *ctx)
488 static const size_t STAGING_FILE_NAME_LEN = 20;
490 name_len = ctx->staging_dir_name_len + 1 + STAGING_FILE_NAME_LEN;
491 name = MALLOC(name_len + 1);
499 memcpy(name, ctx->staging_dir_name, ctx->staging_dir_name_len);
500 name[ctx->staging_dir_name_len] = '/';
501 randomize_char_array_with_alnum(name + ctx->staging_dir_name_len + 1,
502 STAGING_FILE_NAME_LEN);
503 name[name_len] = '\0';
506 /* Just in case, verify that the randomly generated name doesn't name an
507 * existing file, and try again if so */
508 } while (stat(name, &stbuf) == 0);
510 if (errno != ENOENT) /* other error?! */
513 /* doesn't exist--- ok */
515 DEBUG("Creating staging file `%s'", name);
517 fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0600);
529 * Extract a WIM resource to the staging directory.
531 * @inode: Inode that contains the stream we are extracting
533 * @stream_id: Identifier for the stream (it stays constant even if the indices
534 * of the stream entries are changed)
536 * @lte: Pointer to pointer to the lookup table entry for the stream we need to
537 * extract, or NULL if there was no lookup table entry present for the stream
539 * @size: Number of bytes of the stream we want to extract (this supports the
540 * wimfs_truncate() function). It may be more than the actual stream length, in
541 * which case the extra space is filled with zeroes.
543 * @ctx: Context for the WIM filesystem.
545 * Returns 0 on success or a negative error code on failure.
548 extract_resource_to_staging_dir(struct wim_inode *inode,
550 struct wim_lookup_table_entry **lte,
552 struct wimfs_context *ctx)
554 char *staging_file_name;
557 struct wim_lookup_table_entry *old_lte, *new_lte;
560 DEBUG("Extracting resource to staging dir: inode %"PRIu64", "
561 "stream id %"PRIu32, inode->i_ino, stream_id);
565 wimlib_assert(old_lte == NULL ||
566 old_lte->resource_location != RESOURCE_IN_STAGING_FILE);
568 /* Create the staging file */
569 fd = create_staging_file(&staging_file_name, ctx);
573 /* Extract the stream to the staging file (possibly truncated) */
575 struct filedes wimlib_fd;
576 filedes_init(&wimlib_fd, fd);
577 extract_size = min(old_lte->size, size);
578 ret = extract_stream_to_fd(old_lte, &wimlib_fd, extract_size);
584 /* In the case of truncate() to more than the file length, extend the
585 * file with zeroes by calling ftruncate() on the underlying staging
587 if (ret == 0 && size > extract_size)
588 ret = ftruncate(fd, size);
590 /* Close the staging file descriptor and check for errors. If there's
591 * an error, unlink the staging file. */
592 if (ret != 0 || close(fd) != 0) {
598 goto out_delete_staging_file;
601 /* Now deal with the lookup table entries. We may be able to re-use the
602 * existing entry, but we may have to create a new one instead. */
604 if (old_lte && inode->i_nlink == old_lte->refcnt) {
605 /* The reference count of the existing lookup table entry is the
606 * same as the link count of the inode that contains the stream
607 * we're opening. Therefore, ALL the references to the lookup
608 * table entry correspond to the stream we're trying to extract,
609 * so the lookup table entry can be re-used. */
610 DEBUG("Re-using lookup table entry");
611 lookup_table_unlink(ctx->wim->lookup_table, old_lte);
615 /* There's an existing lookup table entry, but its
616 * reference count is greater than the link count for
617 * the inode containing a stream we're opening.
618 * Therefore, we need to split the lookup table entry.
620 wimlib_assert(old_lte->refcnt > inode->i_nlink);
621 DEBUG("Splitting lookup table entry "
622 "(inode->i_nlink = %u, old_lte->refcnt = %u)",
623 inode->i_nlink, old_lte->refcnt);
626 new_lte = new_lookup_table_entry();
629 goto out_delete_staging_file;
632 /* There may already be open file descriptors to this stream if
633 * it's previously been opened read-only, but just now we're
634 * opening it read-write. Identify those file descriptors and
635 * change their lookup table entry pointers to point to the new
636 * lookup table entry, and open staging file descriptors for
639 * At the same time, we need to count the number of these opened
640 * file descriptors to the new lookup table entry. If there's
641 * an old lookup table entry, this number needs to be subtracted
642 * from the fd's opened to the old entry. */
643 for (u16 i = 0, j = 0; j < inode->i_num_opened_fds; i++) {
644 struct wimfs_fd *fd = inode->i_fds[i];
646 if (fd->stream_id == stream_id) {
649 wimlib_assert(fd->f_lte == old_lte);
650 wimlib_assert(!filedes_valid(&fd->staging_fd));
652 new_lte->num_opened_fds++;
653 raw_fd = open(staging_file_name, O_RDONLY);
656 goto out_revert_fd_changes;
658 filedes_init(&fd->staging_fd, raw_fd);
663 DEBUG("%hu fd's were already opened to the file we extracted",
664 new_lte->num_opened_fds);
666 old_lte->num_opened_fds -= new_lte->num_opened_fds;
667 old_lte->refcnt -= inode->i_nlink;
671 lte_put_resource(new_lte);
672 new_lte->refcnt = inode->i_nlink;
673 new_lte->resource_location = RESOURCE_IN_STAGING_FILE;
674 new_lte->staging_file_name = staging_file_name;
675 new_lte->size = size;
677 add_unhashed_stream(new_lte, inode, stream_id,
678 &wim_get_current_image_metadata(ctx->wim)->unhashed_streams);
679 *retrieve_lte_pointer(new_lte) = new_lte;
682 out_revert_fd_changes:
683 for (u16 i = 0, j = 0; j < new_lte->num_opened_fds; i++) {
684 struct wimfs_fd *fd = inode->i_fds[i];
685 if (fd && fd->stream_id == stream_id && fd->f_lte == new_lte) {
687 if (filedes_valid(&fd->staging_fd)) {
688 filedes_close(&fd->staging_fd);
689 filedes_invalidate(&fd->staging_fd);
694 free_lookup_table_entry(new_lte);
695 out_delete_staging_file:
696 unlink(staging_file_name);
697 FREE(staging_file_name);
702 * Creates a randomly named staging directory and saves its name in the
703 * filesystem context structure.
706 make_staging_dir(struct wimfs_context *ctx, const char *user_prefix)
708 static const size_t random_suffix_len = 10;
709 static const char *common_suffix = ".staging";
710 static const size_t common_suffix_len = 8;
712 char *staging_dir_name = NULL;
713 size_t staging_dir_name_len;
715 const char *wim_basename;
716 char *real_user_prefix = NULL;
720 real_user_prefix = realpath(user_prefix, NULL);
721 if (!real_user_prefix) {
722 ERROR_WITH_ERRNO("Could not resolve `%s'",
724 ret = WIMLIB_ERR_NOTDIR;
727 wim_basename = path_basename(ctx->wim->filename);
728 prefix_len = strlen(real_user_prefix) + 1 + strlen(wim_basename);
730 prefix_len = strlen(ctx->wim->filename);
733 staging_dir_name_len = prefix_len + common_suffix_len + random_suffix_len;
735 staging_dir_name = MALLOC(staging_dir_name_len + 1);
736 if (!staging_dir_name) {
737 ret = WIMLIB_ERR_NOMEM;
741 if (real_user_prefix)
742 sprintf(staging_dir_name, "%s/%s", real_user_prefix, wim_basename);
744 strcpy(staging_dir_name, ctx->wim->filename);
746 strcat(staging_dir_name, common_suffix);
748 randomize_char_array_with_alnum(staging_dir_name + prefix_len + common_suffix_len,
751 staging_dir_name[staging_dir_name_len] = '\0';
753 if (mkdir(staging_dir_name, 0700) != 0) {
754 ERROR_WITH_ERRNO("Failed to create temporary directory `%s'",
756 ret = WIMLIB_ERR_MKDIR;
761 FREE(real_user_prefix);
763 ctx->staging_dir_name = staging_dir_name;
764 ctx->staging_dir_name_len = staging_dir_name_len;
766 FREE(staging_dir_name);
772 remove_file_or_directory(const char *fpath, const struct stat *sb,
773 int typeflag, struct FTW *ftwbuf)
775 if (remove(fpath) == 0)
778 ERROR_WITH_ERRNO("Cannot remove `%s'", fpath);
779 return WIMLIB_ERR_DELETE_STAGING_DIR;
784 * Deletes the staging directory and all the files contained in it.
787 delete_staging_dir(struct wimfs_context *ctx)
790 ret = nftw(ctx->staging_dir_name, remove_file_or_directory,
792 FREE(ctx->staging_dir_name);
793 ctx->staging_dir_name = NULL;
798 inode_close_fds(struct wim_inode *inode)
800 u16 num_opened_fds = inode->i_num_opened_fds;
801 for (u16 i = 0, j = 0; j < num_opened_fds; i++) {
802 struct wimfs_fd *fd = inode->i_fds[i];
804 wimlib_assert(fd->f_inode == inode);
805 int ret = close_wimfs_fd(fd);
814 /* Overwrites the WIM file, with changes saved. */
816 rebuild_wim(struct wimfs_context *ctx, int write_flags,
817 wimlib_progress_func_t progress_func)
820 struct wim_lookup_table_entry *lte, *tmp;
821 WIMStruct *wim = ctx->wim;
822 struct wim_image_metadata *imd = wim_get_current_image_metadata(ctx->wim);
824 DEBUG("Closing all staging file descriptors.");
825 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
826 ret = inode_close_fds(lte->back_inode);
831 DEBUG("Freeing entries for zero-length streams");
832 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
833 wimlib_assert(lte->unhashed);
834 if (lte->size == 0) {
835 struct wim_lookup_table_entry **back_ptr;
836 back_ptr = retrieve_lte_pointer(lte);
838 list_del(<e->unhashed_list);
839 free_lookup_table_entry(lte);
843 xml_update_image_info(wim, wim->current_image);
844 ret = wimlib_overwrite(wim, write_flags, 0, progress_func);
846 ERROR("Failed to commit changes to mounted WIM image");
850 /* Simple function that returns the concatenation of 2 strings. */
852 strcat_dup(const char *s1, const char *s2, size_t max_len)
854 size_t len = strlen(s1) + strlen(s2);
857 char *p = MALLOC(len + 1);
860 snprintf(p, len + 1, "%s%s", s1, s2);
865 set_message_queue_names(struct wimfs_context *ctx, const char *mount_dir)
867 static const char *u2d_prefix = "/wimlib-unmount-to-daemon-mq";
868 static const char *d2u_prefix = "/wimlib-daemon-to-unmount-mq";
873 dir_path = realpath(mount_dir, NULL);
875 ERROR_WITH_ERRNO("Failed to resolve path \"%s\"", mount_dir);
877 return WIMLIB_ERR_NOMEM;
879 return WIMLIB_ERR_NOTDIR;
882 for (p = dir_path; *p; p++)
886 ctx->unmount_to_daemon_mq_name = strcat_dup(u2d_prefix, dir_path,
888 if (!ctx->unmount_to_daemon_mq_name) {
889 ret = WIMLIB_ERR_NOMEM;
890 goto out_free_dir_path;
892 ctx->daemon_to_unmount_mq_name = strcat_dup(d2u_prefix, dir_path,
894 if (!ctx->daemon_to_unmount_mq_name) {
895 ret = WIMLIB_ERR_NOMEM;
896 goto out_free_unmount_to_daemon_mq_name;
900 goto out_free_dir_path;
901 out_free_unmount_to_daemon_mq_name:
902 FREE(ctx->unmount_to_daemon_mq_name);
903 ctx->unmount_to_daemon_mq_name = NULL;
910 free_message_queue_names(struct wimfs_context *ctx)
912 FREE(ctx->unmount_to_daemon_mq_name);
913 FREE(ctx->daemon_to_unmount_mq_name);
914 ctx->unmount_to_daemon_mq_name = NULL;
915 ctx->daemon_to_unmount_mq_name = NULL;
919 * Opens two POSIX message queue: one for sending messages from the unmount
920 * process to the daemon process, and one to go the other way. The names of the
921 * message queues, which must be system-wide unique, are be based on the mount
924 * @daemon specifies whether the calling process is the filesystem daemon or the
928 open_message_queues(struct wimfs_context *ctx, bool daemon)
930 int unmount_to_daemon_mq_flags = O_WRONLY | O_CREAT;
931 int daemon_to_unmount_mq_flags = O_RDONLY | O_CREAT;
937 swap(unmount_to_daemon_mq_flags, daemon_to_unmount_mq_flags);
943 orig_umask = umask(0000);
944 DEBUG("Opening message queue \"%s\"", ctx->unmount_to_daemon_mq_name);
945 ctx->unmount_to_daemon_mq = mq_open(ctx->unmount_to_daemon_mq_name,
946 unmount_to_daemon_mq_flags, mode, NULL);
948 if (ctx->unmount_to_daemon_mq == (mqd_t)-1) {
949 ERROR_WITH_ERRNO("mq_open()");
950 ret = WIMLIB_ERR_MQUEUE;
954 DEBUG("Opening message queue \"%s\"", ctx->daemon_to_unmount_mq_name);
955 ctx->daemon_to_unmount_mq = mq_open(ctx->daemon_to_unmount_mq_name,
956 daemon_to_unmount_mq_flags, mode, NULL);
958 if (ctx->daemon_to_unmount_mq == (mqd_t)-1) {
959 ERROR_WITH_ERRNO("mq_open()");
960 mq_close(ctx->unmount_to_daemon_mq);
961 mq_unlink(ctx->unmount_to_daemon_mq_name);
962 ctx->unmount_to_daemon_mq = (mqd_t)-1;
963 ret = WIMLIB_ERR_MQUEUE;
972 /* Try to determine the maximum message size of a message queue. The return
973 * value is the maximum message size, or a guess of 8192 bytes if it cannot be
976 mq_get_msgsize(mqd_t mq)
978 static const char *msgsize_max_file = "/proc/sys/fs/mqueue/msgsize_max";
983 if (mq_getattr(mq, &attr) == 0) {
984 msgsize = attr.mq_msgsize;
986 ERROR_WITH_ERRNO("mq_getattr()");
987 ERROR("Attempting to read %s", msgsize_max_file);
988 fp = fopen(msgsize_max_file, "rb");
990 if (fscanf(fp, "%ld", &msgsize) != 1) {
991 ERROR("Assuming message size of 8192");
996 ERROR_WITH_ERRNO("Failed to open the file `%s'",
998 ERROR("Assuming message size of 8192");
1006 get_mailbox(mqd_t mq, long needed_msgsize, long *msgsize_ret,
1012 msgsize = mq_get_msgsize(mq);
1014 if (msgsize < needed_msgsize) {
1015 ERROR("Message queue max size must be at least %ld!",
1017 return WIMLIB_ERR_MQUEUE;
1020 mailbox = MALLOC(msgsize);
1022 ERROR("Failed to allocate %ld bytes for mailbox", msgsize);
1023 return WIMLIB_ERR_NOMEM;
1025 *msgsize_ret = msgsize;
1026 *mailbox_ret = mailbox;
1031 unlink_message_queues(struct wimfs_context *ctx)
1033 mq_unlink(ctx->unmount_to_daemon_mq_name);
1034 mq_unlink(ctx->daemon_to_unmount_mq_name);
1037 /* Closes the message queues, which are allocated in static variables */
1039 close_message_queues(struct wimfs_context *ctx)
1041 DEBUG("Closing message queues");
1042 mq_close(ctx->unmount_to_daemon_mq);
1043 ctx->unmount_to_daemon_mq = (mqd_t)(-1);
1044 mq_close(ctx->daemon_to_unmount_mq);
1045 ctx->daemon_to_unmount_mq = (mqd_t)(-1);
1046 unlink_message_queues(ctx);
1050 struct unmount_msg_hdr {
1055 } _packed_attribute;
1057 struct msg_unmount_request {
1058 struct unmount_msg_hdr hdr;
1060 u8 want_progress_messages;
1061 } _packed_attribute;
1063 struct msg_daemon_info {
1064 struct unmount_msg_hdr hdr;
1067 } _packed_attribute;
1069 struct msg_unmount_finished {
1070 struct unmount_msg_hdr hdr;
1072 } _packed_attribute;
1074 struct msg_write_streams_progress {
1075 struct unmount_msg_hdr hdr;
1076 union wimlib_progress_info info;
1077 } _packed_attribute;
1080 MSG_TYPE_UNMOUNT_REQUEST,
1081 MSG_TYPE_DAEMON_INFO,
1082 MSG_TYPE_WRITE_STREAMS_PROGRESS,
1083 MSG_TYPE_UNMOUNT_FINISHED,
1087 struct msg_handler_context_hdr {
1088 int timeout_seconds;
1091 struct unmount_msg_handler_context {
1092 struct msg_handler_context_hdr hdr;
1096 wimlib_progress_func_t progress_func;
1099 struct daemon_msg_handler_context {
1100 struct msg_handler_context_hdr hdr;
1101 struct wimfs_context *wimfs_ctx;
1105 send_unmount_request_msg(mqd_t mq, int unmount_flags, u8 want_progress_messages)
1107 DEBUG("Sending unmount request msg");
1108 struct msg_unmount_request msg = {
1110 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1111 .cur_version = WIMLIB_VERSION_CODE,
1112 .msg_type = MSG_TYPE_UNMOUNT_REQUEST,
1113 .msg_size = sizeof(msg),
1115 .unmount_flags = unmount_flags,
1116 .want_progress_messages = want_progress_messages,
1119 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1120 ERROR_WITH_ERRNO("Failed to communicate with filesystem daemon");
1121 return WIMLIB_ERR_MQUEUE;
1127 send_daemon_info_msg(mqd_t mq, pid_t pid, int mount_flags)
1129 DEBUG("Sending daemon info msg (pid = %d, mount_flags=%x)",
1132 struct msg_daemon_info msg = {
1134 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1135 .cur_version = WIMLIB_VERSION_CODE,
1136 .msg_type = MSG_TYPE_DAEMON_INFO,
1137 .msg_size = sizeof(msg),
1140 .mount_flags = mount_flags,
1142 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1143 ERROR_WITH_ERRNO("Failed to send daemon info to unmount process");
1144 return WIMLIB_ERR_MQUEUE;
1150 send_unmount_finished_msg(mqd_t mq, int status)
1152 DEBUG("Sending unmount finished msg");
1153 struct msg_unmount_finished msg = {
1155 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1156 .cur_version = WIMLIB_VERSION_CODE,
1157 .msg_type = MSG_TYPE_UNMOUNT_FINISHED,
1158 .msg_size = sizeof(msg),
1162 if (mq_send(mq, (void*)&msg, sizeof(msg), 1))
1163 ERROR_WITH_ERRNO("Failed to send status to unmount process");
1167 unmount_progress_func(enum wimlib_progress_msg msg,
1168 const union wimlib_progress_info *info)
1170 if (msg == WIMLIB_PROGRESS_MSG_WRITE_STREAMS) {
1171 struct msg_write_streams_progress msg = {
1173 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1174 .cur_version = WIMLIB_VERSION_CODE,
1175 .msg_type = MSG_TYPE_WRITE_STREAMS_PROGRESS,
1176 .msg_size = sizeof(msg),
1180 if (mq_send(wimfs_get_context()->daemon_to_unmount_mq,
1181 (void*)&msg, sizeof(msg), 1))
1183 ERROR_WITH_ERRNO("Failed to send progress information "
1184 "to unmount process");
1191 msg_unmount_request_handler(const void *_msg, void *_handler_ctx)
1193 const struct msg_unmount_request *msg = _msg;
1194 struct daemon_msg_handler_context *handler_ctx = _handler_ctx;
1195 struct wimfs_context *wimfs_ctx;
1199 wimlib_progress_func_t progress_func;
1201 DEBUG("Handling unmount request msg");
1203 wimfs_ctx = handler_ctx->wimfs_ctx;
1204 if (msg->hdr.msg_size < sizeof(*msg)) {
1205 status = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1209 unmount_flags = msg->unmount_flags;
1210 if (msg->want_progress_messages)
1211 progress_func = unmount_progress_func;
1213 progress_func = NULL;
1215 ret = send_daemon_info_msg(wimfs_ctx->daemon_to_unmount_mq, getpid(),
1216 wimfs_ctx->mount_flags);
1222 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1223 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_COMMIT) {
1224 int write_flags = 0;
1225 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY)
1226 write_flags |= WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
1227 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_REBUILD)
1228 write_flags |= WIMLIB_WRITE_FLAG_REBUILD;
1229 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_RECOMPRESS)
1230 write_flags |= WIMLIB_WRITE_FLAG_RECOMPRESS;
1231 status = rebuild_wim(wimfs_ctx, write_flags,
1235 DEBUG("Read-only mount");
1240 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1241 ret = delete_staging_dir(wimfs_ctx);
1243 ERROR("Failed to delete the staging directory");
1248 wimfs_ctx->status = status;
1249 wimfs_ctx->have_status = true;
1250 return MSG_BREAK_LOOP;
1254 msg_daemon_info_handler(const void *_msg, void *_handler_ctx)
1256 const struct msg_daemon_info *msg = _msg;
1257 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1259 DEBUG("Handling daemon info msg");
1260 if (msg->hdr.msg_size < sizeof(*msg))
1261 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1262 handler_ctx->daemon_pid = msg->daemon_pid;
1263 handler_ctx->mount_flags = msg->mount_flags;
1264 handler_ctx->hdr.timeout_seconds = 1;
1265 DEBUG("pid of daemon is %d; mount flags were %#x",
1266 handler_ctx->daemon_pid,
1267 handler_ctx->mount_flags);
1272 msg_write_streams_progress_handler(const void *_msg, void *_handler_ctx)
1274 const struct msg_write_streams_progress *msg = _msg;
1275 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1277 if (msg->hdr.msg_size < sizeof(*msg))
1278 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1279 if (handler_ctx->progress_func) {
1280 handler_ctx->progress_func(WIMLIB_PROGRESS_MSG_WRITE_STREAMS,
1287 msg_unmount_finished_handler(const void *_msg, void *_handler_ctx)
1289 const struct msg_unmount_finished *msg = _msg;
1290 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1292 DEBUG("Handling unmount finished message");
1293 if (msg->hdr.msg_size < sizeof(*msg))
1294 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1295 handler_ctx->status = msg->status;
1296 DEBUG("status is %d", handler_ctx->status);
1297 return MSG_BREAK_LOOP;
1301 unmount_timed_out_cb(void *_handler_ctx)
1303 const struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1305 if (handler_ctx->daemon_pid == 0 ||
1306 (kill(handler_ctx->daemon_pid, 0) != 0 && errno == ESRCH))
1308 ERROR("The filesystem daemon has crashed! Changes to the "
1309 "WIM may not have been commited.");
1310 return WIMLIB_ERR_FILESYSTEM_DAEMON_CRASHED;
1313 DEBUG("Filesystem daemon is still alive... "
1314 "Waiting another %d seconds", handler_ctx->hdr.timeout_seconds);
1319 daemon_timed_out_cb(void *_handler_ctx)
1321 ERROR("Timed out waiting for unmount request! "
1322 "Changes to the mounted WIM will not be committed.");
1323 return WIMLIB_ERR_TIMEOUT;
1326 typedef int (*msg_handler_t)(const void *_msg, void *_handler_ctx);
1328 struct msg_handler_callbacks {
1329 int (*timed_out)(void * _handler_ctx);
1330 msg_handler_t msg_handlers[MSG_TYPE_MAX];
1333 static const struct msg_handler_callbacks unmount_msg_handler_callbacks = {
1334 .timed_out = unmount_timed_out_cb,
1336 [MSG_TYPE_DAEMON_INFO] = msg_daemon_info_handler,
1337 [MSG_TYPE_WRITE_STREAMS_PROGRESS] = msg_write_streams_progress_handler,
1338 [MSG_TYPE_UNMOUNT_FINISHED] = msg_unmount_finished_handler,
1342 static const struct msg_handler_callbacks daemon_msg_handler_callbacks = {
1343 .timed_out = daemon_timed_out_cb,
1345 [MSG_TYPE_UNMOUNT_REQUEST] = msg_unmount_request_handler,
1350 receive_message(mqd_t mq,
1351 struct msg_handler_context_hdr *handler_ctx,
1352 const msg_handler_t msg_handlers[],
1353 long mailbox_size, void *mailbox)
1356 struct timespec timeout;
1357 ssize_t bytes_received;
1358 struct unmount_msg_hdr *hdr;
1361 gettimeofday(&now, NULL);
1362 timeout.tv_sec = now.tv_sec + handler_ctx->timeout_seconds;
1363 timeout.tv_nsec = now.tv_usec * 1000;
1365 bytes_received = mq_timedreceive(mq, mailbox,
1366 mailbox_size, NULL, &timeout);
1368 if (bytes_received == -1) {
1369 if (errno == ETIMEDOUT) {
1370 ret = WIMLIB_ERR_TIMEOUT;
1372 ERROR_WITH_ERRNO("mq_timedreceive()");
1373 ret = WIMLIB_ERR_MQUEUE;
1375 } else if (bytes_received < sizeof(*hdr) ||
1376 bytes_received != hdr->msg_size) {
1377 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1378 } else if (WIMLIB_VERSION_CODE < hdr->min_version) {
1379 /*ERROR("Cannot understand the received message. "*/
1380 /*"Please upgrade wimlib to at least v%d.%d.%d",*/
1381 /*WIMLIB_GET_MAJOR_VERSION(hdr->min_version),*/
1382 /*WIMLIB_GET_MINOR_VERSION(hdr->min_version),*/
1383 /*WIMLIB_GET_PATCH_VERSION(hdr->min_version));*/
1384 ret = MSG_VERSION_TOO_HIGH;
1385 } else if (hdr->msg_type >= MSG_TYPE_MAX) {
1386 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1387 } else if (msg_handlers[hdr->msg_type] == NULL) {
1388 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1390 ret = msg_handlers[hdr->msg_type](mailbox, handler_ctx);
1396 message_loop(mqd_t mq,
1397 const struct msg_handler_callbacks *callbacks,
1398 struct msg_handler_context_hdr *handler_ctx)
1400 static const size_t MAX_MSG_SIZE = 512;
1405 DEBUG("Entering message loop");
1407 ret = get_mailbox(mq, MAX_MSG_SIZE, &msgsize, &mailbox);
1411 ret = receive_message(mq, handler_ctx,
1412 callbacks->msg_handlers,
1414 if (ret == 0 || ret == MSG_VERSION_TOO_HIGH) {
1416 } else if (ret == MSG_BREAK_LOOP) {
1419 } else if (ret == WIMLIB_ERR_TIMEOUT) {
1420 if (callbacks->timed_out)
1421 ret = callbacks->timed_out(handler_ctx);
1427 ERROR_WITH_ERRNO("Error communicating with "
1428 "filesystem daemon");
1433 DEBUG("Exiting message loop");
1437 /* Execute `fusermount -u', which is installed setuid root, to unmount the WIM.
1439 * FUSE does not yet implement synchronous unmounts. This means that fusermount
1440 * -u will return before the filesystem daemon returns from wimfs_destroy().
1441 * This is partly what we want, because we need to send a message from this
1442 * process to the filesystem daemon telling whether --commit was specified or
1443 * not. However, after that, the unmount process must wait for the filesystem
1444 * daemon to finish writing the WIM file.
1447 execute_fusermount(const char *dir, bool lazy)
1455 ERROR_WITH_ERRNO("Failed to fork()");
1456 return WIMLIB_ERR_FORK;
1462 *argp++ = "fusermount";
1466 *argp++ = (char*)dir;
1468 execvp("fusermount", argv);
1469 ERROR_WITH_ERRNO("Failed to execute `fusermount'");
1470 exit(WIMLIB_ERR_FUSERMOUNT);
1474 ret = waitpid(pid, &status, 0);
1476 ERROR_WITH_ERRNO("Failed to wait for fusermount process to "
1478 return WIMLIB_ERR_FUSERMOUNT;
1481 if (!WIFEXITED(status)) {
1482 ERROR("'fusermount' did not terminate normally!");
1483 return WIMLIB_ERR_FUSERMOUNT;
1486 status = WEXITSTATUS(status);
1491 if (status != WIMLIB_ERR_FUSERMOUNT)
1492 return WIMLIB_ERR_FUSERMOUNT;
1494 /* Try again, but with the `umount' program. This is required on other
1495 * FUSE implementations such as FreeBSD's that do not have a
1496 * `fusermount' program. */
1497 ERROR("Falling back to 'umount'. Note: you may need to be "
1498 "root for this to work");
1501 ERROR_WITH_ERRNO("Failed to fork()");
1502 return WIMLIB_ERR_FORK;
1511 *argp++ = (char*)dir;
1513 execvp("umount", argv);
1514 ERROR_WITH_ERRNO("Failed to execute `umount'");
1515 exit(WIMLIB_ERR_FUSERMOUNT);
1519 ret = waitpid(pid, &status, 0);
1521 ERROR_WITH_ERRNO("Failed to wait for `umount' process to "
1523 return WIMLIB_ERR_FUSERMOUNT;
1526 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
1527 ERROR("`umount' did not successfully complete");
1528 return WIMLIB_ERR_FUSERMOUNT;
1535 wimfs_chmod(const char *path, mode_t mask)
1537 struct wim_dentry *dentry;
1538 struct wimfs_context *ctx = wimfs_get_context();
1541 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1544 ret = wim_pathname_to_stream(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1545 &dentry, NULL, NULL);
1549 ret = inode_set_unix_data(dentry->d_inode, ctx->default_uid,
1550 ctx->default_gid, mask,
1551 ctx->wim->lookup_table, UNIX_DATA_MODE);
1552 return ret ? -ENOMEM : 0;
1556 wimfs_chown(const char *path, uid_t uid, gid_t gid)
1558 struct wim_dentry *dentry;
1559 struct wimfs_context *ctx = wimfs_get_context();
1562 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1565 ret = wim_pathname_to_stream(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1566 &dentry, NULL, NULL);
1570 ret = inode_set_unix_data(dentry->d_inode, uid, gid,
1571 inode_default_unix_mode(dentry->d_inode),
1572 ctx->wim->lookup_table,
1573 UNIX_DATA_UID | UNIX_DATA_GID);
1574 return ret ? -ENOMEM : 0;
1577 /* Called when the filesystem is unmounted. */
1579 wimfs_destroy(void *p)
1581 struct wimfs_context *wimfs_ctx = wimfs_get_context();
1582 if (open_message_queues(wimfs_ctx, true) == 0) {
1583 struct daemon_msg_handler_context handler_ctx = {
1585 .timeout_seconds = 5,
1587 .wimfs_ctx = wimfs_ctx,
1589 message_loop(wimfs_ctx->unmount_to_daemon_mq,
1590 &daemon_msg_handler_callbacks,
1596 wimfs_fgetattr(const char *path, struct stat *stbuf,
1597 struct fuse_file_info *fi)
1599 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1600 return inode_to_stbuf(fd->f_inode, fd->f_lte, stbuf);
1604 wimfs_ftruncate(const char *path, off_t size, struct fuse_file_info *fi)
1606 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1607 int ret = ftruncate(fd->staging_fd.fd, size);
1610 touch_inode(fd->f_inode);
1611 fd->f_lte->size = size;
1616 * Fills in a `struct stat' that corresponds to a file or directory in the WIM.
1619 wimfs_getattr(const char *path, struct stat *stbuf)
1621 struct wim_dentry *dentry;
1622 struct wim_lookup_table_entry *lte;
1624 struct wimfs_context *ctx = wimfs_get_context();
1626 ret = wim_pathname_to_stream(ctx->wim, path,
1627 get_lookup_flags(ctx) |
1628 LOOKUP_FLAG_DIRECTORY_OK,
1629 &dentry, <e, NULL);
1632 return inode_to_stbuf(dentry->d_inode, lte, stbuf);
1636 /* Read an alternate data stream through the XATTR interface, or get its size */
1638 wimfs_getxattr(const char *path, const char *name, char *value,
1642 struct wim_inode *inode;
1643 struct wim_ads_entry *ads_entry;
1645 struct wim_lookup_table_entry *lte;
1646 struct wimfs_context *ctx = wimfs_get_context();
1648 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1651 if (strlen(name) <= 5 || memcmp(name, "user.", 5) != 0)
1655 inode = wim_pathname_to_inode(ctx->wim, path);
1659 ads_entry = inode_get_ads_entry(inode, name, NULL);
1663 lte = ads_entry->lte;
1664 stream_size = lte->size;
1669 if (stream_size > size)
1672 ret = read_full_stream_into_buf(lte, value);
1683 /* Create a hard link */
1685 wimfs_link(const char *to, const char *from)
1687 struct wim_dentry *from_dentry, *from_dentry_parent;
1688 const char *link_name;
1689 struct wim_inode *inode;
1690 WIMStruct *wim = wimfs_get_WIMStruct();
1693 inode = wim_pathname_to_inode(wim, to);
1697 if (inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
1698 FILE_ATTRIBUTE_REPARSE_POINT))
1701 from_dentry_parent = get_parent_dentry(wim, from, WIMLIB_CASE_SENSITIVE);
1702 if (!from_dentry_parent)
1704 if (!dentry_is_directory(from_dentry_parent))
1707 link_name = path_basename(from);
1708 if (get_dentry_child_with_name(from_dentry_parent, link_name,
1709 WIMLIB_CASE_SENSITIVE))
1712 ret = new_dentry(link_name, &from_dentry);
1717 inode_ref_streams(inode);
1718 from_dentry->d_inode = inode;
1719 inode_add_dentry(from_dentry, inode);
1720 dentry_add_child(from_dentry_parent, from_dentry);
1726 wimfs_listxattr(const char *path, char *list, size_t size)
1729 struct wim_inode *inode;
1730 struct wimfs_context *ctx = wimfs_get_context();
1733 bool size_only = (size == 0);
1735 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1738 /* List alternate data streams, or get the list size */
1740 inode = wim_pathname_to_inode(ctx->wim, path);
1745 for (i = 0; i < inode->i_num_ads; i++) {
1747 if (!ads_entry_is_named_stream(&inode->i_ads_entries[i]))
1750 char *stream_name_mbs;
1751 size_t stream_name_mbs_nbytes;
1754 ret = utf16le_to_tstr(inode->i_ads_entries[i].stream_name,
1755 inode->i_ads_entries[i].stream_name_nbytes,
1757 &stream_name_mbs_nbytes);
1761 needed_size = stream_name_mbs_nbytes + 6;
1763 if (needed_size > size) {
1764 FREE(stream_name_mbs);
1767 sprintf(p, "user.%s", stream_name_mbs);
1768 size -= needed_size;
1771 FREE(stream_name_mbs);
1778 /* Create a directory in the WIM image. */
1780 wimfs_mkdir(const char *path, mode_t mode)
1782 return create_dentry(fuse_get_context(), path, mode | S_IFDIR,
1783 FILE_ATTRIBUTE_DIRECTORY, NULL);
1786 /* Create a regular file or alternate data stream in the WIM image. */
1788 wimfs_mknod(const char *path, mode_t mode, dev_t rdev)
1790 const char *stream_name;
1791 struct fuse_context *fuse_ctx = fuse_get_context();
1792 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
1797 if ((wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
1798 && (stream_name = path_stream_name(path))) {
1799 /* Make an alternate data stream */
1800 struct wim_ads_entry *new_entry;
1801 struct wim_inode *inode;
1803 char *p = (char*)stream_name - 1;
1804 wimlib_assert(*p == ':');
1807 inode = wim_pathname_to_inode(wimfs_ctx->wim, path);
1810 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)
1812 if (inode_get_ads_entry(inode, stream_name, NULL))
1814 new_entry = inode_add_ads(inode, stream_name);
1819 /* Make a normal file (not an alternate data stream) */
1820 return create_dentry(fuse_ctx, path, mode | S_IFREG,
1821 FILE_ATTRIBUTE_NORMAL, NULL);
1827 wimfs_open(const char *path, struct fuse_file_info *fi)
1829 struct wim_dentry *dentry;
1830 struct wim_lookup_table_entry *lte;
1832 struct wimfs_fd *fd;
1833 struct wim_inode *inode;
1836 struct wimfs_context *ctx = wimfs_get_context();
1837 struct wim_lookup_table_entry **back_ptr;
1839 ret = wim_pathname_to_stream(ctx->wim, path, get_lookup_flags(ctx),
1840 &dentry, <e, &stream_idx);
1844 inode = dentry->d_inode;
1846 if (stream_idx == 0) {
1848 back_ptr = &inode->i_lte;
1850 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
1851 back_ptr = &inode->i_ads_entries[stream_idx - 1].lte;
1854 /* The file resource may be in the staging directory (read-write mounts
1855 * only) or in the WIM. If it's in the staging directory, we need to
1856 * open a native file descriptor for the corresponding file. Otherwise,
1857 * we can read the file resource directly from the WIM file if we are
1858 * opening it read-only, but we need to extract the resource to the
1859 * staging directory if we are opening it writable. */
1861 if (flags_writable(fi->flags) &&
1862 (!lte || lte->resource_location != RESOURCE_IN_STAGING_FILE)) {
1863 u64 size = (lte) ? lte->size : 0;
1864 ret = extract_resource_to_staging_dir(inode, stream_id,
1871 ret = alloc_wimfs_fd(inode, stream_id, lte, &fd);
1875 if (lte && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
1878 raw_fd = open(lte->staging_file_name, fi->flags);
1880 int errno_save = errno;
1884 filedes_init(&fd->staging_fd, raw_fd);
1886 fi->fh = (uintptr_t)fd;
1890 /* Opens a directory. */
1892 wimfs_opendir(const char *path, struct fuse_file_info *fi)
1894 struct wim_inode *inode;
1896 struct wimfs_fd *fd = NULL;
1897 struct wimfs_context *ctx = wimfs_get_context();
1898 WIMStruct *wim = ctx->wim;
1900 inode = wim_pathname_to_inode(wim, path);
1903 if (!inode_is_directory(inode))
1905 ret = alloc_wimfs_fd(inode, 0, NULL, &fd);
1906 fi->fh = (uintptr_t)fd;
1912 * Read data from a file in the WIM or in the staging directory.
1915 wimfs_read(const char *path, char *buf, size_t size,
1916 off_t offset, struct fuse_file_info *fi)
1918 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1929 stream_size = fd->f_lte->size;
1933 if (offset > stream_size)
1936 size = min(size, stream_size - offset);
1940 switch (fd->f_lte->resource_location) {
1941 case RESOURCE_IN_STAGING_FILE:
1942 ret = raw_pread(&fd->staging_fd, buf, size, offset);
1946 case RESOURCE_IN_WIM:
1947 if (read_partial_wim_stream_into_buf(fd->f_lte, size,
1949 ret = errno ? -errno : -EIO;
1953 case RESOURCE_IN_ATTACHED_BUFFER:
1954 memcpy(buf, fd->f_lte->attached_buffer + offset, size);
1958 ERROR("Invalid resource location");
1965 struct fill_params {
1967 fuse_fill_dir_t filler;
1971 dentry_fuse_fill(struct wim_dentry *dentry, void *arg)
1973 struct fill_params *fill_params = arg;
1975 char *file_name_mbs;
1976 size_t file_name_mbs_nbytes;
1979 ret = utf16le_to_tstr(dentry->file_name,
1980 dentry->file_name_nbytes,
1982 &file_name_mbs_nbytes);
1986 ret = fill_params->filler(fill_params->buf, file_name_mbs, NULL, 0);
1987 FREE(file_name_mbs);
1991 /* Fills in the entries of the directory specified by @path using the
1992 * FUSE-provided function @filler. */
1994 wimfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
1995 off_t offset, struct fuse_file_info *fi)
1997 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1998 struct wim_inode *inode;
2003 inode = fd->f_inode;
2005 struct fill_params fill_params = {
2010 filler(buf, ".", NULL, 0);
2011 filler(buf, "..", NULL, 0);
2013 return for_dentry_in_rbtree(inode->i_children.rb_node,
2014 dentry_fuse_fill, &fill_params);
2019 wimfs_readlink(const char *path, char *buf, size_t buf_len)
2021 struct wimfs_context *ctx = wimfs_get_context();
2022 struct wim_inode *inode = wim_pathname_to_inode(ctx->wim, path);
2026 if (!inode_is_symlink(inode))
2030 ret = wim_inode_readlink(inode, buf, buf_len - 1, NULL);
2032 wimlib_assert(ret <= buf_len - 1);
2035 } else if (ret == -ENAMETOOLONG) {
2036 buf[buf_len - 1] = '\0';
2043 wimfs_release(const char *path, struct fuse_file_info *fi)
2045 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2046 return close_wimfs_fd(fd);
2049 /* Close a directory */
2051 wimfs_releasedir(const char *path, struct fuse_file_info *fi)
2053 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2054 return close_wimfs_fd(fd);
2058 /* Remove an alternate data stream through the XATTR interface */
2060 wimfs_removexattr(const char *path, const char *name)
2062 struct wim_inode *inode;
2063 struct wim_ads_entry *ads_entry;
2065 struct wimfs_context *ctx = wimfs_get_context();
2067 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2070 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2074 inode = wim_pathname_to_inode(ctx->wim, path);
2078 ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2081 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2086 /* Renames a file or directory. See rename (3) */
2088 wimfs_rename(const char *from, const char *to)
2090 return rename_wim_path(wimfs_get_WIMStruct(), from, to,
2091 WIMLIB_CASE_SENSITIVE);
2094 /* Remove a directory */
2096 wimfs_rmdir(const char *path)
2098 struct wim_dentry *dentry;
2099 WIMStruct *wim = wimfs_get_WIMStruct();
2101 dentry = get_dentry(wim, path, WIMLIB_CASE_SENSITIVE);
2105 if (!dentry_is_directory(dentry))
2108 if (dentry_has_children(dentry))
2111 remove_dentry(dentry, wim->lookup_table);
2116 /* Write an alternate data stream through the XATTR interface */
2118 wimfs_setxattr(const char *path, const char *name,
2119 const char *value, size_t size, int flags)
2121 struct wim_ads_entry *existing_ads_entry;
2122 struct wim_inode *inode;
2124 struct wimfs_context *ctx = wimfs_get_context();
2127 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2130 if (strlen(name) <= 5 || memcmp(name, "user.", 5) != 0)
2134 inode = wim_pathname_to_inode(ctx->wim, path);
2138 existing_ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2139 if (existing_ads_entry) {
2140 if (flags & XATTR_CREATE)
2143 if (flags & XATTR_REPLACE)
2147 ret = inode_add_ads_with_data(inode, name, value,
2148 size, ctx->wim->lookup_table);
2150 if (existing_ads_entry)
2151 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2160 wimfs_symlink(const char *to, const char *from)
2162 struct fuse_context *fuse_ctx = fuse_get_context();
2163 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
2164 struct wim_dentry *dentry;
2167 ret = create_dentry(fuse_ctx, from, S_IFLNK | 0777,
2168 FILE_ATTRIBUTE_REPARSE_POINT, &dentry);
2170 dentry->d_inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
2171 ret = wim_inode_set_symlink(dentry->d_inode, to,
2172 wimfs_ctx->wim->lookup_table);
2174 remove_dentry(dentry, wimfs_ctx->wim->lookup_table);
2175 if (ret == WIMLIB_ERR_NOMEM)
2185 /* Reduce the size of a file */
2187 wimfs_truncate(const char *path, off_t size)
2189 struct wim_dentry *dentry;
2190 struct wim_lookup_table_entry *lte;
2194 struct wim_inode *inode;
2195 struct wimfs_context *ctx = wimfs_get_context();
2197 ret = wim_pathname_to_stream(ctx->wim, path, get_lookup_flags(ctx),
2198 &dentry, <e, &stream_idx);
2203 if (lte == NULL && size == 0)
2206 if (lte != NULL && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
2207 ret = truncate(lte->staging_file_name, size);
2213 /* File in WIM. Extract it to the staging directory, but only
2214 * the first @size bytes of it. */
2215 struct wim_lookup_table_entry **back_ptr;
2217 inode = dentry->d_inode;
2218 if (stream_idx == 0) {
2220 back_ptr = &inode->i_lte;
2222 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
2223 back_ptr = &inode->i_ads_entries[stream_idx - 1].lte;
2225 ret = extract_resource_to_staging_dir(inode, stream_id,
2232 /* Unlink a non-directory or alternate data stream */
2234 wimfs_unlink(const char *path)
2236 struct wim_dentry *dentry;
2237 struct wim_lookup_table_entry *lte;
2240 struct wimfs_context *ctx = wimfs_get_context();
2242 ret = wim_pathname_to_stream(ctx->wim, path, get_lookup_flags(ctx),
2243 &dentry, <e, &stream_idx);
2248 if (inode_stream_name_nbytes(dentry->d_inode, stream_idx) == 0)
2249 remove_dentry(dentry, ctx->wim->lookup_table);
2251 inode_remove_ads(dentry->d_inode, stream_idx - 1,
2252 ctx->wim->lookup_table);
2256 #ifdef HAVE_UTIMENSAT
2258 * Change the timestamp on a file dentry.
2260 * Note that alternate data streams do not have their own timestamps.
2263 wimfs_utimens(const char *path, const struct timespec tv[2])
2265 struct wim_dentry *dentry;
2266 struct wim_inode *inode;
2267 WIMStruct *wim = wimfs_get_WIMStruct();
2269 dentry = get_dentry(wim, path, WIMLIB_CASE_SENSITIVE);
2272 inode = dentry->d_inode;
2274 if (tv[0].tv_nsec != UTIME_OMIT) {
2275 if (tv[0].tv_nsec == UTIME_NOW)
2276 inode->i_last_access_time = get_wim_timestamp();
2278 inode->i_last_access_time = timespec_to_wim_timestamp(tv[0]);
2280 if (tv[1].tv_nsec != UTIME_OMIT) {
2281 if (tv[1].tv_nsec == UTIME_NOW)
2282 inode->i_last_write_time = get_wim_timestamp();
2284 inode->i_last_write_time = timespec_to_wim_timestamp(tv[1]);
2288 #else /* HAVE_UTIMENSAT */
2290 wimfs_utime(const char *path, struct utimbuf *times)
2292 struct wim_dentry *dentry;
2293 struct wim_inode *inode;
2294 WIMStruct *wim = wimfs_get_WIMStruct();
2296 dentry = get_dentry(wim, path, WIMLIB_CASE_SENSITIVE);
2299 inode = dentry->d_inode;
2301 inode->i_last_write_time = unix_timestamp_to_wim(times->modtime);
2302 inode->i_last_access_time = unix_timestamp_to_wim(times->actime);
2305 #endif /* !HAVE_UTIMENSAT */
2307 /* Writes to a file in the WIM filesystem.
2308 * It may be an alternate data stream, but here we don't even notice because we
2309 * just get a lookup table entry. */
2311 wimfs_write(const char *path, const char *buf, size_t size,
2312 off_t offset, struct fuse_file_info *fi)
2314 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2320 wimlib_assert(fd->f_lte != NULL);
2321 wimlib_assert(fd->f_lte->staging_file_name != NULL);
2322 wimlib_assert(filedes_valid(&fd->staging_fd));
2323 wimlib_assert(fd->f_inode != NULL);
2325 /* Write the data. */
2326 ret = raw_pwrite(&fd->staging_fd, buf, size, offset);
2330 /* Update file size */
2331 if (offset + size > fd->f_lte->size) {
2332 DEBUG("Update file size %"PRIu64 " => %"PRIu64"",
2333 fd->f_lte->size, offset + size);
2334 fd->f_lte->size = offset + size;
2337 /* Update timestamps */
2338 touch_inode(fd->f_inode);
2342 static struct fuse_operations wimfs_operations = {
2343 .chmod = wimfs_chmod,
2344 .chown = wimfs_chown,
2345 .destroy = wimfs_destroy,
2346 .fgetattr = wimfs_fgetattr,
2347 .ftruncate = wimfs_ftruncate,
2348 .getattr = wimfs_getattr,
2350 .getxattr = wimfs_getxattr,
2354 .listxattr = wimfs_listxattr,
2356 .mkdir = wimfs_mkdir,
2357 .mknod = wimfs_mknod,
2359 .opendir = wimfs_opendir,
2361 .readdir = wimfs_readdir,
2362 .readlink = wimfs_readlink,
2363 .release = wimfs_release,
2364 .releasedir = wimfs_releasedir,
2366 .removexattr = wimfs_removexattr,
2368 .rename = wimfs_rename,
2369 .rmdir = wimfs_rmdir,
2371 .setxattr = wimfs_setxattr,
2373 .symlink = wimfs_symlink,
2374 .truncate = wimfs_truncate,
2375 .unlink = wimfs_unlink,
2376 #ifdef HAVE_UTIMENSAT
2377 .utimens = wimfs_utimens,
2379 .utime = wimfs_utime,
2381 .write = wimfs_write,
2383 /* wimfs keeps file descriptor structures (struct wimfs_fd), so there is
2384 * no need to have the file path provided on operations such as read()
2385 * where only the file descriptor is needed. */
2386 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2387 .flag_nullpath_ok = 1,
2389 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 9)
2391 .flag_utime_omit_ok = 1,
2396 /* API function documented in wimlib.h */
2398 wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
2399 int mount_flags, const char *staging_dir)
2405 struct wim_image_metadata *imd;
2406 struct wimfs_context ctx;
2407 struct wim_inode *inode;
2409 DEBUG("Mount: wim = %p, image = %d, dir = %s, flags = %d, ",
2410 wim, image, dir, mount_flags);
2413 return WIMLIB_ERR_INVALID_PARAM;
2415 if (mount_flags & ~(WIMLIB_MOUNT_FLAG_READWRITE |
2416 WIMLIB_MOUNT_FLAG_DEBUG |
2417 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_NONE |
2418 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR |
2419 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS |
2420 WIMLIB_MOUNT_FLAG_UNIX_DATA |
2421 WIMLIB_MOUNT_FLAG_ALLOW_OTHER))
2422 return WIMLIB_ERR_INVALID_PARAM;
2424 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2425 ret = can_delete_from_wim(wim);
2430 ret = select_wim_image(wim, image);
2434 DEBUG("Selected image %d", image);
2436 imd = wim_get_current_image_metadata(wim);
2438 if (imd->modified) {
2439 /* wimfs_read() only supports a limited number of stream
2440 * locations, not including RESOURCE_IN_FILE_ON_DISK,
2441 * RESOURCE_IN_NTFS_VOLUME, etc. that might appear if files were
2442 * added to the WIM image. */
2443 ERROR("Cannot mount an image with newly added files!");
2444 return WIMLIB_ERR_INVALID_PARAM;
2447 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2448 ret = lock_wim(wim, wim->in_fd.fd);
2453 /* Use default stream interface if one was not specified */
2454 if (!(mount_flags & (WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_NONE |
2455 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR |
2456 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)))
2457 mount_flags |= WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR;
2459 DEBUG("Initializing struct wimfs_context");
2460 init_wimfs_context(&ctx);
2462 ctx.mount_flags = mount_flags;
2463 ctx.image_inode_list = &imd->inode_list;
2464 ctx.default_uid = getuid();
2465 ctx.default_gid = getgid();
2466 wimlib_assert(list_empty(&imd->unhashed_streams));
2467 if (mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
2468 ctx.default_lookup_flags = LOOKUP_FLAG_ADS_OK;
2470 DEBUG("Unlinking message queues in case they already exist");
2471 ret = set_message_queue_names(&ctx, dir);
2474 unlink_message_queues(&ctx);
2476 DEBUG("Preparing arguments to fuse_main()");
2478 dir_copy = STRDUP(dir);
2480 ret = WIMLIB_ERR_NOMEM;
2481 goto out_free_message_queue_names;
2485 argv[argc++] = "wimlib";
2486 argv[argc++] = dir_copy;
2488 /* disable multi-threaded operation */
2489 argv[argc++] = "-s";
2491 if (mount_flags & WIMLIB_MOUNT_FLAG_DEBUG)
2492 argv[argc++] = "-d";
2495 * We provide the use_ino option to the FUSE mount because we are going
2496 * to assign inode numbers ourselves. */
2497 char optstring[256] =
2501 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2504 ",default_permissions"
2506 argv[argc++] = "-o";
2507 argv[argc++] = optstring;
2508 if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)) {
2509 /* Read-write mount. Make the staging directory */
2510 ret = make_staging_dir(&ctx, staging_dir);
2512 goto out_free_dir_copy;
2514 /* Read-only mount */
2515 strcat(optstring, ",ro");
2517 if (mount_flags & WIMLIB_MOUNT_FLAG_ALLOW_OTHER)
2518 strcat(optstring, ",allow_other");
2524 DEBUG("FUSE command line (argc = %d): ", argc);
2525 for (i = 0; i < argc; i++) {
2526 fputs(argv[i], stdout);
2534 /* Mark dentry tree as modified if read-write mount. */
2535 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)
2538 /* Resolve the lookup table entries for every inode in the image, and
2539 * assign inode numbers */
2540 DEBUG("Resolving lookup table entries and assigning inode numbers");
2542 image_for_each_inode(inode, imd)
2543 inode->i_ino = ctx.next_ino++;
2544 DEBUG("(next_ino = %"PRIu64")", ctx.next_ino);
2546 DEBUG("Calling fuse_main()");
2548 ret = fuse_main(argc, argv, &wimfs_operations, &ctx);
2550 DEBUG("Returned from fuse_main() (ret = %d)", ret);
2553 ret = WIMLIB_ERR_FUSE;
2555 if (ctx.have_status)
2558 ret = WIMLIB_ERR_TIMEOUT;
2560 if (ctx.daemon_to_unmount_mq != (mqd_t)(-1)) {
2561 send_unmount_finished_msg(ctx.daemon_to_unmount_mq, ret);
2562 close_message_queues(&ctx);
2565 /* Try to delete the staging directory if a deletion wasn't yet
2566 * attempted due to an earlier error */
2567 if (ctx.staging_dir_name)
2568 delete_staging_dir(&ctx);
2572 wim->wim_locked = 0;
2573 out_free_message_queue_names:
2574 free_message_queue_names(&ctx);
2578 /* API function documented in wimlib.h */
2580 wimlib_unmount_image(const char *dir, int unmount_flags,
2581 wimlib_progress_func_t progress_func)
2584 struct wimfs_context wimfs_ctx;
2586 if (unmount_flags & ~(WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY |
2587 WIMLIB_UNMOUNT_FLAG_COMMIT |
2588 WIMLIB_UNMOUNT_FLAG_REBUILD |
2589 WIMLIB_UNMOUNT_FLAG_RECOMPRESS |
2590 WIMLIB_UNMOUNT_FLAG_LAZY))
2591 return WIMLIB_ERR_INVALID_PARAM;
2593 init_wimfs_context(&wimfs_ctx);
2595 ret = set_message_queue_names(&wimfs_ctx, dir);
2599 ret = open_message_queues(&wimfs_ctx, false);
2601 goto out_free_message_queue_names;
2603 ret = send_unmount_request_msg(wimfs_ctx.unmount_to_daemon_mq,
2605 progress_func != NULL);
2607 goto out_close_message_queues;
2609 ret = execute_fusermount(dir, (unmount_flags & WIMLIB_UNMOUNT_FLAG_LAZY) != 0);
2611 goto out_close_message_queues;
2613 struct unmount_msg_handler_context handler_ctx = {
2615 .timeout_seconds = 5,
2618 .progress_func = progress_func,
2621 ret = message_loop(wimfs_ctx.daemon_to_unmount_mq,
2622 &unmount_msg_handler_callbacks,
2625 ret = handler_ctx.status;
2626 out_close_message_queues:
2627 close_message_queues(&wimfs_ctx);
2628 out_free_message_queue_names:
2629 free_message_queue_names(&wimfs_ctx);
2634 #else /* WITH_FUSE */
2638 mount_unsupported_error(void)
2640 #if defined(__WIN32__)
2641 ERROR("Sorry-- Mounting WIM images is not supported on Windows!");
2643 ERROR("wimlib was compiled with --without-fuse, which disables support "
2644 "for mounting WIMs.");
2646 return WIMLIB_ERR_UNSUPPORTED;
2650 wimlib_unmount_image(const tchar *dir, int unmount_flags,
2651 wimlib_progress_func_t progress_func)
2653 return mount_unsupported_error();
2657 wimlib_mount_image(WIMStruct *wim, int image, const tchar *dir,
2658 int mount_flags, const tchar *staging_dir)
2660 return mount_unsupported_error();
2663 #endif /* !WITH_FUSE */