4 * This file implements mounting of WIM files using FUSE, which stands for
5 * Filesystem in Userspace. FUSE allows a filesystem to be implemented in a
6 * userspace process by implementing the filesystem primitives--- read(),
7 * write(), readdir(), etc.
11 * Copyright (C) 2012, 2013 Eric Biggers
13 * This file is part of wimlib, a library for working with WIM files.
15 * wimlib is free software; you can redistribute it and/or modify it under the
16 * terms of the GNU General Public License as published by the Free
17 * Software Foundation; either version 3 of the License, or (at your option)
20 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
21 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
22 * A PARTICULAR PURPOSE. See the GNU General Public License for more
25 * You should have received a copy of the GNU General Public License
26 * along with wimlib; if not, see http://www.gnu.org/licenses/.
34 #include "wimlib/error.h"
39 # error "FUSE mount not supported on Win32! Please configure --without-fuse"
42 #include "wimlib/encoding.h"
43 #include "wimlib/file_io.h"
44 #include "wimlib/lookup_table.h"
45 #include "wimlib/metadata.h"
46 #include "wimlib/paths.h"
47 #include "wimlib/reparse.h"
48 #include "wimlib/resource.h"
49 #include "wimlib/swm.h"
50 #include "wimlib/timestamp.h"
51 #include "wimlib/version.h"
52 #include "wimlib/write.h"
53 #include "wimlib/xml.h"
64 #include <sys/types.h>
69 #define FUSE_USE_VERSION 26
73 #include <attr/xattr.h>
76 #define MSG_VERSION_TOO_HIGH -1
77 #define MSG_BREAK_LOOP -2
79 /* File descriptor to a file open on the WIM filesystem. */
81 struct wim_inode *f_inode;
82 struct wim_lookup_table_entry *f_lte;
83 struct filedes staging_fd;
88 struct wimfs_context {
89 /* The WIMStruct for the mounted WIM. */
92 /* Name of the staging directory for a read-write mount. Whenever a new file is
93 * created, it is done so in the staging directory. Furthermore, whenever a
94 * file in the WIM is modified, it is extracted to the staging directory. If
95 * changes are commited when the WIM is unmounted, the file resources are merged
96 * in from the staging directory when writing the new WIM. */
97 char *staging_dir_name;
98 size_t staging_dir_name_len;
100 /* Flags passed to wimlib_mount(). */
103 /* Default flags to use when looking up a WIM dentry (depends on whether
104 * the Windows interface to alternate data streams is being used or
106 int default_lookup_flags;
108 /* Next inode number to be assigned. Note: I didn't bother with a
109 * bitmap of free inode numbers since this isn't even a "real"
110 * filesystem anyway. */
113 /* List of inodes in the mounted image */
114 struct list_head *image_inode_list;
116 /* Name and message queue descriptors for message queues between the
117 * filesystem daemon process and the unmount process. These are used
118 * when the filesystem is unmounted and the process running
119 * wimlib_unmount_image() needs to communicate with the filesystem
120 * daemon running fuse_main() (i.e. the process created by a call to
121 * wimlib_mount_image(). */
122 char *unmount_to_daemon_mq_name;
123 char *daemon_to_unmount_mq_name;
124 mqd_t unmount_to_daemon_mq;
125 mqd_t daemon_to_unmount_mq;
135 init_wimfs_context(struct wimfs_context *ctx)
137 memset(ctx, 0, sizeof(*ctx));
138 ctx->unmount_to_daemon_mq = (mqd_t)-1;
139 ctx->daemon_to_unmount_mq = (mqd_t)-1;
142 #define WIMFS_CTX(fuse_ctx) ((struct wimfs_context*)(fuse_ctx)->private_data)
144 static inline struct wimfs_context *
145 wimfs_get_context(void)
147 return WIMFS_CTX(fuse_get_context());
150 static inline WIMStruct *
151 wimfs_get_WIMStruct(void)
153 return wimfs_get_context()->wim;
157 wimfs_ctx_readonly(const struct wimfs_context *ctx)
159 return (ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) == 0;
163 get_lookup_flags(const struct wimfs_context *ctx)
165 return ctx->default_lookup_flags;
168 /* Returns nonzero if write permission is requested on the file open flags */
170 flags_writable(int open_flags)
172 return open_flags & (O_RDWR | O_WRONLY);
176 * Allocate a file descriptor for a stream.
178 * @inode: inode containing the stream we're opening
179 * @stream_id: ID of the stream we're opening
180 * @lte: Lookup table entry for the stream (may be NULL)
181 * @fd_ret: Return the allocated file descriptor if successful.
182 * @readonly: True if this is a read-only mount.
184 * Return 0 iff successful or error code if unsuccessful.
187 alloc_wimfs_fd(struct wim_inode *inode,
189 struct wim_lookup_table_entry *lte,
190 struct wimfs_fd **fd_ret,
193 static const u16 fds_per_alloc = 8;
194 static const u16 max_fds = 0xffff;
197 DEBUG("Allocating fd for stream ID %u from inode %#"PRIx64" "
198 "(open = %u, allocated = %u)",
199 stream_id, inode->i_ino, inode->i_num_opened_fds,
200 inode->i_num_allocated_fds);
202 if (inode->i_num_opened_fds == inode->i_num_allocated_fds) {
203 struct wimfs_fd **fds;
206 if (inode->i_num_allocated_fds == max_fds) {
210 num_new_fds = min(fds_per_alloc,
211 max_fds - inode->i_num_allocated_fds);
213 fds = REALLOC(inode->i_fds,
214 (inode->i_num_allocated_fds + num_new_fds) *
215 sizeof(inode->i_fds[0]));
220 memset(&fds[inode->i_num_allocated_fds], 0,
221 num_new_fds * sizeof(fds[0]));
223 inode->i_num_allocated_fds += num_new_fds;
225 for (u16 i = 0; ; i++) {
226 if (!inode->i_fds[i]) {
227 struct wimfs_fd *fd = CALLOC(1, sizeof(*fd));
234 filedes_invalidate(&fd->staging_fd);
236 fd->stream_id = stream_id;
238 inode->i_fds[i] = fd;
239 inode->i_num_opened_fds++;
240 if (lte && !readonly)
241 lte->num_opened_fds++;
242 DEBUG("Allocated fd (idx = %u)", fd->idx);
252 inode_put_fd(struct wim_inode *inode, struct wimfs_fd *fd)
254 wimlib_assert(inode != NULL);
255 wimlib_assert(fd->f_inode == inode);
256 wimlib_assert(inode->i_num_opened_fds != 0);
257 wimlib_assert(fd->idx < inode->i_num_allocated_fds);
258 wimlib_assert(inode->i_fds[fd->idx] == fd);
260 inode->i_fds[fd->idx] = NULL;
262 if (--inode->i_num_opened_fds == 0) {
265 inode->i_num_allocated_fds = 0;
266 if (inode->i_nlink == 0)
272 lte_put_fd(struct wim_lookup_table_entry *lte, struct wimfs_fd *fd)
274 wimlib_assert(fd->f_lte == lte);
276 if (!lte) /* Empty stream with no lookup table entry */
279 /* Close staging file descriptor if needed. */
281 if (lte->resource_location == RESOURCE_IN_STAGING_FILE
282 && filedes_valid(&fd->staging_fd))
284 if (filedes_close(&fd->staging_fd)) {
285 ERROR_WITH_ERRNO("Failed to close staging file");
289 lte_decrement_num_opened_fds(lte);
293 /* Close a file descriptor. */
295 close_wimfs_fd(struct wimfs_fd *fd)
298 DEBUG("Closing fd (ino = %#"PRIx64", opened = %u, allocated = %u)",
299 fd->f_inode->i_ino, fd->f_inode->i_num_opened_fds,
300 fd->f_inode->i_num_allocated_fds);
301 ret = lte_put_fd(fd->f_lte, fd);
305 inode_put_fd(fd->f_inode, fd);
310 fuse_mask_mode(mode_t mode, struct fuse_context *fuse_ctx)
312 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
313 mode &= ~fuse_ctx->umask;
319 * Add a new dentry with a new inode to a WIM image.
321 * Returns 0 on success, or negative error number on failure.
324 create_dentry(struct fuse_context *fuse_ctx, const char *path,
325 mode_t mode, int attributes, struct wim_dentry **dentry_ret)
327 struct wim_dentry *parent;
328 struct wim_dentry *new;
329 const char *basename;
330 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
333 parent = get_parent_dentry(wimfs_ctx->wim, path);
337 if (!dentry_is_directory(parent))
340 basename = path_basename(path);
341 if (get_dentry_child_with_name(parent, basename))
344 ret = new_dentry_with_inode(basename, &new);
348 new->d_inode->i_resolved = 1;
349 new->d_inode->i_ino = wimfs_ctx->next_ino++;
350 new->d_inode->i_attributes = attributes;
352 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
353 if (inode_set_unix_data(new->d_inode,
356 fuse_mask_mode(mode, fuse_ctx),
357 wimfs_ctx->wim->lookup_table,
358 UNIX_DATA_ALL | UNIX_DATA_CREATE))
364 dentry_add_child(parent, new);
365 list_add_tail(&new->d_inode->i_list, wimfs_ctx->image_inode_list);
371 /* Remove a dentry from a mounted WIM image; i.e. remove an alias for the
372 * corresponding inode.
374 * If there are no remaining references to the inode either through dentries or
375 * open file descriptors, the inode is freed. Otherwise, the inode is not
376 * removed, but the dentry is unlinked and freed.
378 * Either way, all lookup table entries referenced by the inode have their
379 * reference count decremented. If a lookup table entry has no open file
380 * descriptors and no references remaining, it is freed, and the corresponding
381 * staging file is unlinked.
384 remove_dentry(struct wim_dentry *dentry,
385 struct wim_lookup_table *lookup_table)
387 struct wim_inode *inode = dentry->d_inode;
388 struct wim_lookup_table_entry *lte;
391 for (i = 0; i <= inode->i_num_ads; i++) {
392 lte = inode_stream_lte_resolved(inode, i);
394 lte_decrement_refcnt(lte, lookup_table);
396 unlink_dentry(dentry);
401 inode_default_unix_mode(const struct wim_inode *inode)
403 if (inode_is_symlink(inode))
404 return S_IFLNK | 0777;
405 else if (inode_is_directory(inode))
406 return S_IFDIR | 0777;
408 return S_IFREG | 0777;
411 /* Transfers file attributes from a struct wim_inode to a `stat' buffer.
413 * The lookup table entry tells us which stream in the inode we are statting.
414 * For a named data stream, everything returned is the same as the unnamed data
415 * stream except possibly the size and block count. */
417 inode_to_stbuf(const struct wim_inode *inode,
418 const struct wim_lookup_table_entry *lte,
421 const struct wimfs_context *ctx = wimfs_get_context();
423 memset(stbuf, 0, sizeof(struct stat));
424 stbuf->st_mode = inode_default_unix_mode(inode);
425 stbuf->st_uid = ctx->default_uid;
426 stbuf->st_gid = ctx->default_gid;
427 if (ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
428 struct wimlib_unix_data unix_data;
429 if (inode_get_unix_data(inode, &unix_data, NULL) == 0) {
430 stbuf->st_uid = unix_data.uid;
431 stbuf->st_gid = unix_data.gid;
432 stbuf->st_mode = unix_data.mode;
435 stbuf->st_ino = (ino_t)inode->i_ino;
436 stbuf->st_nlink = inode->i_nlink;
438 stbuf->st_size = wim_resource_size(lte);
441 #ifdef HAVE_STAT_NANOSECOND_PRECISION
442 stbuf->st_atim = wim_timestamp_to_timespec(inode->i_last_access_time);
443 stbuf->st_mtim = wim_timestamp_to_timespec(inode->i_last_write_time);
444 stbuf->st_ctim = stbuf->st_mtim;
446 stbuf->st_atime = wim_timestamp_to_unix(inode->i_last_access_time);
447 stbuf->st_mtime = wim_timestamp_to_unix(inode->i_last_write_time);
448 stbuf->st_ctime = stbuf->st_mtime;
450 stbuf->st_blocks = (stbuf->st_size + 511) / 512;
455 touch_inode(struct wim_inode *inode)
457 u64 now = get_wim_timestamp();
458 inode->i_last_access_time = now;
459 inode->i_last_write_time = now;
462 /* Creates a new staging file and returns its file descriptor opened for
465 * @name_ret: A location into which the a pointer to the newly allocated name of
466 * the staging file is stored.
468 * @ctx: Context for the WIM filesystem; this provides the name of the
471 * On success, returns the file descriptor for the staging file, opened for
472 * writing. On failure, returns -1 and sets errno.
475 create_staging_file(char **name_ret, struct wimfs_context *ctx)
483 static const size_t STAGING_FILE_NAME_LEN = 20;
485 name_len = ctx->staging_dir_name_len + 1 + STAGING_FILE_NAME_LEN;
486 name = MALLOC(name_len + 1);
494 memcpy(name, ctx->staging_dir_name, ctx->staging_dir_name_len);
495 name[ctx->staging_dir_name_len] = '/';
496 randomize_char_array_with_alnum(name + ctx->staging_dir_name_len + 1,
497 STAGING_FILE_NAME_LEN);
498 name[name_len] = '\0';
501 /* Just in case, verify that the randomly generated name doesn't name an
502 * existing file, and try again if so */
503 } while (stat(name, &stbuf) == 0);
505 if (errno != ENOENT) /* other error?! */
508 /* doesn't exist--- ok */
510 DEBUG("Creating staging file `%s'", name);
512 fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0600);
524 * Extract a WIM resource to the staging directory.
526 * @inode: Inode that contains the stream we are extracting
528 * @stream_id: Identifier for the stream (it stays constant even if the indices
529 * of the stream entries are changed)
531 * @lte: Pointer to pointer to the lookup table entry for the stream we need to
532 * extract, or NULL if there was no lookup table entry present for the stream
534 * @size: Number of bytes of the stream we want to extract (this supports the
535 * wimfs_truncate() function). It may be more than the actual stream length, in
536 * which case the extra space is filled with zeroes.
538 * @ctx: Context for the WIM filesystem.
540 * Returns 0 on success or a negative error code on failure.
543 extract_resource_to_staging_dir(struct wim_inode *inode,
545 struct wim_lookup_table_entry **lte,
547 struct wimfs_context *ctx)
549 char *staging_file_name;
552 struct wim_lookup_table_entry *old_lte, *new_lte;
555 DEBUG("Extracting resource to staging dir: inode %"PRIu64", "
556 "stream id %"PRIu32, inode->i_ino, stream_id);
560 wimlib_assert(old_lte == NULL ||
561 old_lte->resource_location != RESOURCE_IN_STAGING_FILE);
563 /* Create the staging file */
564 fd = create_staging_file(&staging_file_name, ctx);
568 /* Extract the stream to the staging file (possibly truncated) */
570 struct filedes wimlib_fd;
571 filedes_init(&wimlib_fd, fd);
572 extract_size = min(wim_resource_size(old_lte), size);
573 ret = extract_wim_resource_to_fd(old_lte, &wimlib_fd,
580 /* In the case of truncate() to more than the file length, extend the
581 * file with zeroes by calling ftruncate() on the underlying staging
583 if (ret == 0 && size > extract_size)
584 ret = ftruncate(fd, size);
586 /* Close the staging file descriptor and check for errors. If there's
587 * an error, unlink the staging file. */
588 if (ret != 0 || close(fd) != 0) {
594 goto out_delete_staging_file;
597 /* Now deal with the lookup table entries. We may be able to re-use the
598 * existing entry, but we may have to create a new one instead. */
600 if (old_lte && inode->i_nlink == old_lte->refcnt) {
601 /* The reference count of the existing lookup table entry is the
602 * same as the link count of the inode that contains the stream
603 * we're opening. Therefore, ALL the references to the lookup
604 * table entry correspond to the stream we're trying to extract,
605 * so the lookup table entry can be re-used. */
606 DEBUG("Re-using lookup table entry");
607 lookup_table_unlink(ctx->wim->lookup_table, old_lte);
611 /* There's an existing lookup table entry, but its
612 * reference count is greater than the link count for
613 * the inode containing a stream we're opening.
614 * Therefore, we need to split the lookup table entry.
616 wimlib_assert(old_lte->refcnt > inode->i_nlink);
617 DEBUG("Splitting lookup table entry "
618 "(inode->i_nlink = %u, old_lte->refcnt = %u)",
619 inode->i_nlink, old_lte->refcnt);
622 new_lte = new_lookup_table_entry();
625 goto out_delete_staging_file;
628 /* There may already be open file descriptors to this stream if
629 * it's previously been opened read-only, but just now we're
630 * opening it read-write. Identify those file descriptors and
631 * change their lookup table entry pointers to point to the new
632 * lookup table entry, and open staging file descriptors for
635 * At the same time, we need to count the number of these opened
636 * file descriptors to the new lookup table entry. If there's
637 * an old lookup table entry, this number needs to be subtracted
638 * from the fd's opened to the old entry. */
639 for (u16 i = 0, j = 0; j < inode->i_num_opened_fds; i++) {
640 struct wimfs_fd *fd = inode->i_fds[i];
642 if (fd->stream_id == stream_id) {
645 wimlib_assert(fd->f_lte == old_lte);
646 wimlib_assert(!filedes_valid(&fd->staging_fd));
648 new_lte->num_opened_fds++;
649 raw_fd = open(staging_file_name, O_RDONLY);
652 goto out_revert_fd_changes;
654 filedes_init(&fd->staging_fd, raw_fd);
659 DEBUG("%hu fd's were already opened to the file we extracted",
660 new_lte->num_opened_fds);
662 old_lte->num_opened_fds -= new_lte->num_opened_fds;
663 old_lte->refcnt -= inode->i_nlink;
667 new_lte->refcnt = inode->i_nlink;
668 new_lte->resource_location = RESOURCE_IN_STAGING_FILE;
669 new_lte->staging_file_name = staging_file_name;
670 new_lte->resource_entry.original_size = size;
672 lookup_table_insert_unhashed(ctx->wim->lookup_table, new_lte,
674 *retrieve_lte_pointer(new_lte) = new_lte;
677 out_revert_fd_changes:
678 for (u16 i = 0, j = 0; j < new_lte->num_opened_fds; i++) {
679 struct wimfs_fd *fd = inode->i_fds[i];
680 if (fd && fd->stream_id == stream_id && fd->f_lte == new_lte) {
682 if (filedes_valid(&fd->staging_fd)) {
683 filedes_close(&fd->staging_fd);
684 filedes_invalidate(&fd->staging_fd);
689 free_lookup_table_entry(new_lte);
690 out_delete_staging_file:
691 unlink(staging_file_name);
692 FREE(staging_file_name);
697 * Creates a randomly named staging directory and saves its name in the
698 * filesystem context structure.
701 make_staging_dir(struct wimfs_context *ctx, const char *user_prefix)
703 static const size_t random_suffix_len = 10;
704 static const char *common_suffix = ".staging";
705 static const size_t common_suffix_len = 8;
707 char *staging_dir_name = NULL;
708 size_t staging_dir_name_len;
710 const char *wim_basename;
711 char *real_user_prefix = NULL;
715 real_user_prefix = realpath(user_prefix, NULL);
716 if (!real_user_prefix) {
717 ERROR_WITH_ERRNO("Could not resolve `%s'",
719 ret = WIMLIB_ERR_NOTDIR;
722 wim_basename = path_basename(ctx->wim->filename);
723 prefix_len = strlen(real_user_prefix) + 1 + strlen(wim_basename);
725 prefix_len = strlen(ctx->wim->filename);
728 staging_dir_name_len = prefix_len + common_suffix_len + random_suffix_len;
730 staging_dir_name = MALLOC(staging_dir_name_len + 1);
731 if (!staging_dir_name) {
732 ret = WIMLIB_ERR_NOMEM;
736 if (real_user_prefix)
737 sprintf(staging_dir_name, "%s/%s", real_user_prefix, wim_basename);
739 strcpy(staging_dir_name, ctx->wim->filename);
741 strcat(staging_dir_name, common_suffix);
743 randomize_char_array_with_alnum(staging_dir_name + prefix_len + common_suffix_len,
746 staging_dir_name[staging_dir_name_len] = '\0';
748 if (mkdir(staging_dir_name, 0700) != 0) {
749 ERROR_WITH_ERRNO("Failed to create temporary directory `%s'",
751 ret = WIMLIB_ERR_MKDIR;
756 FREE(real_user_prefix);
758 ctx->staging_dir_name = staging_dir_name;
759 ctx->staging_dir_name_len = staging_dir_name_len;
761 FREE(staging_dir_name);
767 remove_file_or_directory(const char *fpath, const struct stat *sb,
768 int typeflag, struct FTW *ftwbuf)
770 if (remove(fpath) == 0)
773 ERROR_WITH_ERRNO("Cannot remove `%s'", fpath);
774 return WIMLIB_ERR_DELETE_STAGING_DIR;
779 * Deletes the staging directory and all the files contained in it.
782 delete_staging_dir(struct wimfs_context *ctx)
785 ret = nftw(ctx->staging_dir_name, remove_file_or_directory,
787 FREE(ctx->staging_dir_name);
788 ctx->staging_dir_name = NULL;
793 inode_close_fds(struct wim_inode *inode)
795 u16 num_opened_fds = inode->i_num_opened_fds;
796 for (u16 i = 0, j = 0; j < num_opened_fds; i++) {
797 struct wimfs_fd *fd = inode->i_fds[i];
799 wimlib_assert(fd->f_inode == inode);
800 int ret = close_wimfs_fd(fd);
809 /* Overwrites the WIM file, with changes saved. */
811 rebuild_wim(struct wimfs_context *ctx, int write_flags,
812 wimlib_progress_func_t progress_func)
815 struct wim_lookup_table_entry *lte, *tmp;
816 WIMStruct *wim = ctx->wim;
817 struct wim_image_metadata *imd = wim_get_current_image_metadata(ctx->wim);
819 DEBUG("Closing all staging file descriptors.");
820 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
821 ret = inode_close_fds(lte->back_inode);
826 DEBUG("Freeing entries for zero-length streams");
827 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
828 wimlib_assert(lte->unhashed);
829 if (wim_resource_size(lte) == 0) {
830 struct wim_lookup_table_entry **back_ptr;
831 back_ptr = retrieve_lte_pointer(lte);
833 list_del(<e->unhashed_list);
834 free_lookup_table_entry(lte);
838 xml_update_image_info(wim, wim->current_image);
839 ret = wimlib_overwrite(wim, write_flags, 0, progress_func);
841 ERROR("Failed to commit changes to mounted WIM image");
845 /* Simple function that returns the concatenation of 2 strings. */
847 strcat_dup(const char *s1, const char *s2, size_t max_len)
849 size_t len = strlen(s1) + strlen(s2);
852 char *p = MALLOC(len + 1);
855 snprintf(p, len + 1, "%s%s", s1, s2);
860 set_message_queue_names(struct wimfs_context *ctx, const char *mount_dir)
862 static const char *u2d_prefix = "/wimlib-unmount-to-daemon-mq";
863 static const char *d2u_prefix = "/wimlib-daemon-to-unmount-mq";
868 dir_path = realpath(mount_dir, NULL);
870 ERROR_WITH_ERRNO("Failed to resolve path \"%s\"", mount_dir);
872 return WIMLIB_ERR_NOMEM;
874 return WIMLIB_ERR_NOTDIR;
877 for (p = dir_path; *p; p++)
881 ctx->unmount_to_daemon_mq_name = strcat_dup(u2d_prefix, dir_path,
883 if (!ctx->unmount_to_daemon_mq_name) {
884 ret = WIMLIB_ERR_NOMEM;
885 goto out_free_dir_path;
887 ctx->daemon_to_unmount_mq_name = strcat_dup(d2u_prefix, dir_path,
889 if (!ctx->daemon_to_unmount_mq_name) {
890 ret = WIMLIB_ERR_NOMEM;
891 goto out_free_unmount_to_daemon_mq_name;
895 goto out_free_dir_path;
896 out_free_unmount_to_daemon_mq_name:
897 FREE(ctx->unmount_to_daemon_mq_name);
898 ctx->unmount_to_daemon_mq_name = NULL;
905 free_message_queue_names(struct wimfs_context *ctx)
907 FREE(ctx->unmount_to_daemon_mq_name);
908 FREE(ctx->daemon_to_unmount_mq_name);
909 ctx->unmount_to_daemon_mq_name = NULL;
910 ctx->daemon_to_unmount_mq_name = NULL;
914 * Opens two POSIX message queue: one for sending messages from the unmount
915 * process to the daemon process, and one to go the other way. The names of the
916 * message queues, which must be system-wide unique, are be based on the mount
919 * @daemon specifies whether the calling process is the filesystem daemon or the
923 open_message_queues(struct wimfs_context *ctx, bool daemon)
925 int unmount_to_daemon_mq_flags = O_WRONLY | O_CREAT;
926 int daemon_to_unmount_mq_flags = O_RDONLY | O_CREAT;
932 swap(unmount_to_daemon_mq_flags, daemon_to_unmount_mq_flags);
938 orig_umask = umask(0000);
939 DEBUG("Opening message queue \"%s\"", ctx->unmount_to_daemon_mq_name);
940 ctx->unmount_to_daemon_mq = mq_open(ctx->unmount_to_daemon_mq_name,
941 unmount_to_daemon_mq_flags, mode, NULL);
943 if (ctx->unmount_to_daemon_mq == (mqd_t)-1) {
944 ERROR_WITH_ERRNO("mq_open()");
945 ret = WIMLIB_ERR_MQUEUE;
949 DEBUG("Opening message queue \"%s\"", ctx->daemon_to_unmount_mq_name);
950 ctx->daemon_to_unmount_mq = mq_open(ctx->daemon_to_unmount_mq_name,
951 daemon_to_unmount_mq_flags, mode, NULL);
953 if (ctx->daemon_to_unmount_mq == (mqd_t)-1) {
954 ERROR_WITH_ERRNO("mq_open()");
955 mq_close(ctx->unmount_to_daemon_mq);
956 mq_unlink(ctx->unmount_to_daemon_mq_name);
957 ctx->unmount_to_daemon_mq = (mqd_t)-1;
958 ret = WIMLIB_ERR_MQUEUE;
967 /* Try to determine the maximum message size of a message queue. The return
968 * value is the maximum message size, or a guess of 8192 bytes if it cannot be
971 mq_get_msgsize(mqd_t mq)
973 static const char *msgsize_max_file = "/proc/sys/fs/mqueue/msgsize_max";
978 if (mq_getattr(mq, &attr) == 0) {
979 msgsize = attr.mq_msgsize;
981 ERROR_WITH_ERRNO("mq_getattr()");
982 ERROR("Attempting to read %s", msgsize_max_file);
983 fp = fopen(msgsize_max_file, "rb");
985 if (fscanf(fp, "%ld", &msgsize) != 1) {
986 ERROR("Assuming message size of 8192");
991 ERROR_WITH_ERRNO("Failed to open the file `%s'",
993 ERROR("Assuming message size of 8192");
1001 get_mailbox(mqd_t mq, long needed_msgsize, long *msgsize_ret,
1007 msgsize = mq_get_msgsize(mq);
1009 if (msgsize < needed_msgsize) {
1010 ERROR("Message queue max size must be at least %ld!",
1012 return WIMLIB_ERR_MQUEUE;
1015 mailbox = MALLOC(msgsize);
1017 ERROR("Failed to allocate %ld bytes for mailbox", msgsize);
1018 return WIMLIB_ERR_NOMEM;
1020 *msgsize_ret = msgsize;
1021 *mailbox_ret = mailbox;
1026 unlink_message_queues(struct wimfs_context *ctx)
1028 mq_unlink(ctx->unmount_to_daemon_mq_name);
1029 mq_unlink(ctx->daemon_to_unmount_mq_name);
1032 /* Closes the message queues, which are allocated in static variables */
1034 close_message_queues(struct wimfs_context *ctx)
1036 DEBUG("Closing message queues");
1037 mq_close(ctx->unmount_to_daemon_mq);
1038 ctx->unmount_to_daemon_mq = (mqd_t)(-1);
1039 mq_close(ctx->daemon_to_unmount_mq);
1040 ctx->daemon_to_unmount_mq = (mqd_t)(-1);
1041 unlink_message_queues(ctx);
1045 struct unmount_msg_hdr {
1050 } _packed_attribute;
1052 struct msg_unmount_request {
1053 struct unmount_msg_hdr hdr;
1055 u8 want_progress_messages;
1056 } _packed_attribute;
1058 struct msg_daemon_info {
1059 struct unmount_msg_hdr hdr;
1062 } _packed_attribute;
1064 struct msg_unmount_finished {
1065 struct unmount_msg_hdr hdr;
1067 } _packed_attribute;
1069 struct msg_write_streams_progress {
1070 struct unmount_msg_hdr hdr;
1071 union wimlib_progress_info info;
1072 } _packed_attribute;
1075 MSG_TYPE_UNMOUNT_REQUEST,
1076 MSG_TYPE_DAEMON_INFO,
1077 MSG_TYPE_WRITE_STREAMS_PROGRESS,
1078 MSG_TYPE_UNMOUNT_FINISHED,
1082 struct msg_handler_context_hdr {
1083 int timeout_seconds;
1086 struct unmount_msg_handler_context {
1087 struct msg_handler_context_hdr hdr;
1091 wimlib_progress_func_t progress_func;
1094 struct daemon_msg_handler_context {
1095 struct msg_handler_context_hdr hdr;
1096 struct wimfs_context *wimfs_ctx;
1100 send_unmount_request_msg(mqd_t mq, int unmount_flags, u8 want_progress_messages)
1102 DEBUG("Sending unmount request msg");
1103 struct msg_unmount_request msg = {
1105 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1106 .cur_version = WIMLIB_VERSION_CODE,
1107 .msg_type = MSG_TYPE_UNMOUNT_REQUEST,
1108 .msg_size = sizeof(msg),
1110 .unmount_flags = unmount_flags,
1111 .want_progress_messages = want_progress_messages,
1114 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1115 ERROR_WITH_ERRNO("Failed to communicate with filesystem daemon");
1116 return WIMLIB_ERR_MQUEUE;
1122 send_daemon_info_msg(mqd_t mq, pid_t pid, int mount_flags)
1124 DEBUG("Sending daemon info msg (pid = %d, mount_flags=%x)",
1127 struct msg_daemon_info msg = {
1129 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1130 .cur_version = WIMLIB_VERSION_CODE,
1131 .msg_type = MSG_TYPE_DAEMON_INFO,
1132 .msg_size = sizeof(msg),
1135 .mount_flags = mount_flags,
1137 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1138 ERROR_WITH_ERRNO("Failed to send daemon info to unmount process");
1139 return WIMLIB_ERR_MQUEUE;
1145 send_unmount_finished_msg(mqd_t mq, int status)
1147 DEBUG("Sending unmount finished msg");
1148 struct msg_unmount_finished msg = {
1150 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1151 .cur_version = WIMLIB_VERSION_CODE,
1152 .msg_type = MSG_TYPE_UNMOUNT_FINISHED,
1153 .msg_size = sizeof(msg),
1157 if (mq_send(mq, (void*)&msg, sizeof(msg), 1))
1158 ERROR_WITH_ERRNO("Failed to send status to unmount process");
1162 unmount_progress_func(enum wimlib_progress_msg msg,
1163 const union wimlib_progress_info *info)
1165 if (msg == WIMLIB_PROGRESS_MSG_WRITE_STREAMS) {
1166 struct msg_write_streams_progress msg = {
1168 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1169 .cur_version = WIMLIB_VERSION_CODE,
1170 .msg_type = MSG_TYPE_WRITE_STREAMS_PROGRESS,
1171 .msg_size = sizeof(msg),
1175 if (mq_send(wimfs_get_context()->daemon_to_unmount_mq,
1176 (void*)&msg, sizeof(msg), 1))
1178 ERROR_WITH_ERRNO("Failed to send progress information "
1179 "to unmount process");
1186 msg_unmount_request_handler(const void *_msg, void *_handler_ctx)
1188 const struct msg_unmount_request *msg = _msg;
1189 struct daemon_msg_handler_context *handler_ctx = _handler_ctx;
1190 struct wimfs_context *wimfs_ctx;
1194 wimlib_progress_func_t progress_func;
1196 DEBUG("Handling unmount request msg");
1198 wimfs_ctx = handler_ctx->wimfs_ctx;
1199 if (msg->hdr.msg_size < sizeof(*msg)) {
1200 status = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1204 unmount_flags = msg->unmount_flags;
1205 if (msg->want_progress_messages)
1206 progress_func = unmount_progress_func;
1208 progress_func = NULL;
1210 ret = send_daemon_info_msg(wimfs_ctx->daemon_to_unmount_mq, getpid(),
1211 wimfs_ctx->mount_flags);
1217 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1218 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_COMMIT) {
1219 int write_flags = 0;
1220 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY)
1221 write_flags |= WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
1222 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_REBUILD)
1223 write_flags |= WIMLIB_WRITE_FLAG_REBUILD;
1224 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_RECOMPRESS)
1225 write_flags |= WIMLIB_WRITE_FLAG_RECOMPRESS;
1226 status = rebuild_wim(wimfs_ctx, write_flags,
1230 DEBUG("Read-only mount");
1235 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1236 ret = delete_staging_dir(wimfs_ctx);
1238 ERROR("Failed to delete the staging directory");
1243 wimfs_ctx->status = status;
1244 wimfs_ctx->have_status = true;
1245 return MSG_BREAK_LOOP;
1249 msg_daemon_info_handler(const void *_msg, void *_handler_ctx)
1251 const struct msg_daemon_info *msg = _msg;
1252 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1254 DEBUG("Handling daemon info msg");
1255 if (msg->hdr.msg_size < sizeof(*msg))
1256 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1257 handler_ctx->daemon_pid = msg->daemon_pid;
1258 handler_ctx->mount_flags = msg->mount_flags;
1259 handler_ctx->hdr.timeout_seconds = 1;
1260 DEBUG("pid of daemon is %d; mount flags were %#x",
1261 handler_ctx->daemon_pid,
1262 handler_ctx->mount_flags);
1267 msg_write_streams_progress_handler(const void *_msg, void *_handler_ctx)
1269 const struct msg_write_streams_progress *msg = _msg;
1270 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1272 if (msg->hdr.msg_size < sizeof(*msg))
1273 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1274 if (handler_ctx->progress_func) {
1275 handler_ctx->progress_func(WIMLIB_PROGRESS_MSG_WRITE_STREAMS,
1282 msg_unmount_finished_handler(const void *_msg, void *_handler_ctx)
1284 const struct msg_unmount_finished *msg = _msg;
1285 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1287 DEBUG("Handling unmount finished message");
1288 if (msg->hdr.msg_size < sizeof(*msg))
1289 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1290 handler_ctx->status = msg->status;
1291 DEBUG("status is %d", handler_ctx->status);
1292 return MSG_BREAK_LOOP;
1296 unmount_timed_out_cb(void *_handler_ctx)
1298 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1300 if (handler_ctx->daemon_pid == 0) {
1303 kill(handler_ctx->daemon_pid, 0);
1304 if (errno == ESRCH) {
1307 DEBUG("Filesystem daemon is still alive... "
1308 "Waiting another %d seconds\n",
1309 handler_ctx->hdr.timeout_seconds);
1314 ERROR("The filesystem daemon has crashed! Changes to the "
1315 "WIM may not have been commited.");
1316 return WIMLIB_ERR_FILESYSTEM_DAEMON_CRASHED;
1320 daemon_timed_out_cb(void *_handler_ctx)
1322 ERROR("Timed out waiting for unmount request! "
1323 "Changes to the mounted WIM will not be committed.");
1324 return WIMLIB_ERR_TIMEOUT;
1327 typedef int (*msg_handler_t)(const void *_msg, void *_handler_ctx);
1329 struct msg_handler_callbacks {
1330 int (*timed_out)(void * _handler_ctx);
1331 msg_handler_t msg_handlers[MSG_TYPE_MAX];
1334 static const struct msg_handler_callbacks unmount_msg_handler_callbacks = {
1335 .timed_out = unmount_timed_out_cb,
1337 [MSG_TYPE_DAEMON_INFO] = msg_daemon_info_handler,
1338 [MSG_TYPE_WRITE_STREAMS_PROGRESS] = msg_write_streams_progress_handler,
1339 [MSG_TYPE_UNMOUNT_FINISHED] = msg_unmount_finished_handler,
1343 static const struct msg_handler_callbacks daemon_msg_handler_callbacks = {
1344 .timed_out = daemon_timed_out_cb,
1346 [MSG_TYPE_UNMOUNT_REQUEST] = msg_unmount_request_handler,
1351 receive_message(mqd_t mq,
1352 struct msg_handler_context_hdr *handler_ctx,
1353 const msg_handler_t msg_handlers[],
1354 long mailbox_size, void *mailbox)
1357 struct timespec timeout;
1358 ssize_t bytes_received;
1359 struct unmount_msg_hdr *hdr;
1362 gettimeofday(&now, NULL);
1363 timeout.tv_sec = now.tv_sec + handler_ctx->timeout_seconds;
1364 timeout.tv_nsec = now.tv_usec * 1000;
1366 bytes_received = mq_timedreceive(mq, mailbox,
1367 mailbox_size, NULL, &timeout);
1369 if (bytes_received == -1) {
1370 if (errno == ETIMEDOUT) {
1371 ret = WIMLIB_ERR_TIMEOUT;
1373 ERROR_WITH_ERRNO("mq_timedreceive()");
1374 ret = WIMLIB_ERR_MQUEUE;
1376 } else if (bytes_received < sizeof(*hdr) ||
1377 bytes_received != hdr->msg_size) {
1378 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1379 } else if (WIMLIB_VERSION_CODE < hdr->min_version) {
1380 /*ERROR("Cannot understand the received message. "*/
1381 /*"Please upgrade wimlib to at least v%d.%d.%d",*/
1382 /*WIMLIB_GET_MAJOR_VERSION(hdr->min_version),*/
1383 /*WIMLIB_GET_MINOR_VERSION(hdr->min_version),*/
1384 /*WIMLIB_GET_PATCH_VERSION(hdr->min_version));*/
1385 ret = MSG_VERSION_TOO_HIGH;
1386 } else if (hdr->msg_type >= MSG_TYPE_MAX) {
1387 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1388 } else if (msg_handlers[hdr->msg_type] == NULL) {
1389 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1391 ret = msg_handlers[hdr->msg_type](mailbox, handler_ctx);
1397 message_loop(mqd_t mq,
1398 const struct msg_handler_callbacks *callbacks,
1399 struct msg_handler_context_hdr *handler_ctx)
1401 static const size_t MAX_MSG_SIZE = 512;
1406 DEBUG("Entering message loop");
1408 ret = get_mailbox(mq, MAX_MSG_SIZE, &msgsize, &mailbox);
1412 ret = receive_message(mq, handler_ctx,
1413 callbacks->msg_handlers,
1415 if (ret == 0 || ret == MSG_VERSION_TOO_HIGH) {
1417 } else if (ret == MSG_BREAK_LOOP) {
1420 } else if (ret == WIMLIB_ERR_TIMEOUT) {
1421 if (callbacks->timed_out)
1422 ret = callbacks->timed_out(handler_ctx);
1428 ERROR_WITH_ERRNO("Error communicating with "
1429 "filesystem daemon");
1434 DEBUG("Exiting message loop");
1438 /* Execute `fusermount -u', which is installed setuid root, to unmount the WIM.
1440 * FUSE does not yet implement synchronous unmounts. This means that fusermount
1441 * -u will return before the filesystem daemon returns from wimfs_destroy().
1442 * This is partly what we want, because we need to send a message from this
1443 * process to the filesystem daemon telling whether --commit was specified or
1444 * not. However, after that, the unmount process must wait for the filesystem
1445 * daemon to finish writing the WIM file.
1448 execute_fusermount(const char *dir, bool lazy)
1456 ERROR_WITH_ERRNO("Failed to fork()");
1457 return WIMLIB_ERR_FORK;
1463 *argp++ = "fusermount";
1467 *argp++ = (char*)dir;
1469 execvp("fusermount", argv);
1470 ERROR_WITH_ERRNO("Failed to execute `fusermount'");
1471 exit(WIMLIB_ERR_FUSERMOUNT);
1475 ret = waitpid(pid, &status, 0);
1477 ERROR_WITH_ERRNO("Failed to wait for fusermount process to "
1479 return WIMLIB_ERR_FUSERMOUNT;
1482 if (!WIFEXITED(status)) {
1483 ERROR("'fusermount' did not terminate normally!");
1484 return WIMLIB_ERR_FUSERMOUNT;
1487 status = WEXITSTATUS(status);
1492 if (status != WIMLIB_ERR_FUSERMOUNT)
1493 return WIMLIB_ERR_FUSERMOUNT;
1495 /* Try again, but with the `umount' program. This is required on other
1496 * FUSE implementations such as FreeBSD's that do not have a
1497 * `fusermount' program. */
1498 ERROR("Falling back to 'umount'. Note: you may need to be "
1499 "root for this to work");
1502 ERROR_WITH_ERRNO("Failed to fork()");
1503 return WIMLIB_ERR_FORK;
1512 *argp++ = (char*)dir;
1514 execvp("umount", argv);
1515 ERROR_WITH_ERRNO("Failed to execute `umount'");
1516 exit(WIMLIB_ERR_FUSERMOUNT);
1520 ret = waitpid(pid, &status, 0);
1522 ERROR_WITH_ERRNO("Failed to wait for `umount' process to "
1524 return WIMLIB_ERR_FUSERMOUNT;
1527 ERROR("`umount' did not successfully complete");
1528 return WIMLIB_ERR_FUSERMOUNT;
1534 wimfs_chmod(const char *path, mode_t mask)
1536 struct wim_dentry *dentry;
1537 struct wimfs_context *ctx = wimfs_get_context();
1540 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1543 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1544 &dentry, NULL, NULL);
1548 ret = inode_set_unix_data(dentry->d_inode, ctx->default_uid,
1549 ctx->default_gid, mask,
1550 ctx->wim->lookup_table, UNIX_DATA_MODE);
1551 return ret ? -ENOMEM : 0;
1555 wimfs_chown(const char *path, uid_t uid, gid_t gid)
1557 struct wim_dentry *dentry;
1558 struct wimfs_context *ctx = wimfs_get_context();
1561 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1564 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1565 &dentry, NULL, NULL);
1569 ret = inode_set_unix_data(dentry->d_inode, uid, gid,
1570 inode_default_unix_mode(dentry->d_inode),
1571 ctx->wim->lookup_table,
1572 UNIX_DATA_UID | UNIX_DATA_GID);
1573 return ret ? -ENOMEM : 0;
1576 /* Called when the filesystem is unmounted. */
1578 wimfs_destroy(void *p)
1580 struct wimfs_context *wimfs_ctx = wimfs_get_context();
1581 if (open_message_queues(wimfs_ctx, true) == 0) {
1582 struct daemon_msg_handler_context handler_ctx = {
1584 .timeout_seconds = 5,
1586 .wimfs_ctx = wimfs_ctx,
1588 message_loop(wimfs_ctx->unmount_to_daemon_mq,
1589 &daemon_msg_handler_callbacks,
1595 wimfs_fgetattr(const char *path, struct stat *stbuf,
1596 struct fuse_file_info *fi)
1598 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1599 return inode_to_stbuf(fd->f_inode, fd->f_lte, stbuf);
1603 wimfs_ftruncate(const char *path, off_t size, struct fuse_file_info *fi)
1605 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1606 int ret = ftruncate(fd->staging_fd.fd, size);
1609 touch_inode(fd->f_inode);
1610 fd->f_lte->resource_entry.original_size = size;
1615 * Fills in a `struct stat' that corresponds to a file or directory in the WIM.
1618 wimfs_getattr(const char *path, struct stat *stbuf)
1620 struct wim_dentry *dentry;
1621 struct wim_lookup_table_entry *lte;
1623 struct wimfs_context *ctx = wimfs_get_context();
1625 ret = lookup_resource(ctx->wim, path,
1626 get_lookup_flags(ctx) | LOOKUP_FLAG_DIRECTORY_OK,
1627 &dentry, <e, NULL);
1630 return inode_to_stbuf(dentry->d_inode, lte, stbuf);
1634 /* Read an alternate data stream through the XATTR interface, or get its size */
1636 wimfs_getxattr(const char *path, const char *name, char *value,
1640 struct wim_inode *inode;
1641 struct wim_ads_entry *ads_entry;
1643 struct wim_lookup_table_entry *lte;
1644 struct wimfs_context *ctx = wimfs_get_context();
1646 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1649 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
1653 inode = wim_pathname_to_inode(ctx->wim, path);
1657 ads_entry = inode_get_ads_entry(inode, name, NULL);
1661 lte = ads_entry->lte;
1662 res_size = wim_resource_size(lte);
1667 if (res_size > size)
1670 ret = read_full_resource_into_buf(lte, value);
1681 /* Create a hard link */
1683 wimfs_link(const char *to, const char *from)
1685 struct wim_dentry *from_dentry, *from_dentry_parent;
1686 const char *link_name;
1687 struct wim_inode *inode;
1688 WIMStruct *wim = wimfs_get_WIMStruct();
1691 inode = wim_pathname_to_inode(wim, to);
1695 if (inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
1696 FILE_ATTRIBUTE_REPARSE_POINT))
1699 from_dentry_parent = get_parent_dentry(wim, from);
1700 if (!from_dentry_parent)
1702 if (!dentry_is_directory(from_dentry_parent))
1705 link_name = path_basename(from);
1706 if (get_dentry_child_with_name(from_dentry_parent, link_name))
1709 ret = new_dentry(link_name, &from_dentry);
1714 inode_ref_streams(inode);
1715 from_dentry->d_inode = inode;
1716 inode_add_dentry(from_dentry, inode);
1717 dentry_add_child(from_dentry_parent, from_dentry);
1723 wimfs_listxattr(const char *path, char *list, size_t size)
1726 struct wim_inode *inode;
1727 struct wimfs_context *ctx = wimfs_get_context();
1730 bool size_only = (size == 0);
1732 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1735 /* List alternate data streams, or get the list size */
1737 inode = wim_pathname_to_inode(ctx->wim, path);
1742 for (i = 0; i < inode->i_num_ads; i++) {
1743 char *stream_name_mbs;
1744 size_t stream_name_mbs_nbytes;
1747 ret = utf16le_to_tstr(inode->i_ads_entries[i].stream_name,
1748 inode->i_ads_entries[i].stream_name_nbytes,
1750 &stream_name_mbs_nbytes);
1754 needed_size = stream_name_mbs_nbytes + 6;
1756 if (needed_size > size) {
1757 FREE(stream_name_mbs);
1760 sprintf(p, "user.%s", stream_name_mbs);
1761 size -= needed_size;
1764 FREE(stream_name_mbs);
1771 /* Create a directory in the WIM image. */
1773 wimfs_mkdir(const char *path, mode_t mode)
1775 return create_dentry(fuse_get_context(), path, mode | S_IFDIR,
1776 FILE_ATTRIBUTE_DIRECTORY, NULL);
1779 /* Create a regular file or alternate data stream in the WIM image. */
1781 wimfs_mknod(const char *path, mode_t mode, dev_t rdev)
1783 const char *stream_name;
1784 struct fuse_context *fuse_ctx = fuse_get_context();
1785 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
1790 if ((wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
1791 && (stream_name = path_stream_name(path))) {
1792 /* Make an alternate data stream */
1793 struct wim_ads_entry *new_entry;
1794 struct wim_inode *inode;
1796 char *p = (char*)stream_name - 1;
1797 wimlib_assert(*p == ':');
1800 inode = wim_pathname_to_inode(wimfs_ctx->wim, path);
1803 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)
1805 if (inode_get_ads_entry(inode, stream_name, NULL))
1807 new_entry = inode_add_ads(inode, stream_name);
1812 /* Make a normal file (not an alternate data stream) */
1813 return create_dentry(fuse_ctx, path, mode | S_IFREG,
1814 FILE_ATTRIBUTE_NORMAL, NULL);
1820 wimfs_open(const char *path, struct fuse_file_info *fi)
1822 struct wim_dentry *dentry;
1823 struct wim_lookup_table_entry *lte;
1825 struct wimfs_fd *fd;
1826 struct wim_inode *inode;
1829 struct wimfs_context *ctx = wimfs_get_context();
1830 struct wim_lookup_table_entry **back_ptr;
1832 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
1833 &dentry, <e, &stream_idx);
1837 inode = dentry->d_inode;
1839 if (stream_idx == 0) {
1841 back_ptr = &inode->i_lte;
1843 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
1844 back_ptr = &inode->i_ads_entries[stream_idx - 1].lte;
1847 /* The file resource may be in the staging directory (read-write mounts
1848 * only) or in the WIM. If it's in the staging directory, we need to
1849 * open a native file descriptor for the corresponding file. Otherwise,
1850 * we can read the file resource directly from the WIM file if we are
1851 * opening it read-only, but we need to extract the resource to the
1852 * staging directory if we are opening it writable. */
1854 if (flags_writable(fi->flags) &&
1855 (!lte || lte->resource_location != RESOURCE_IN_STAGING_FILE)) {
1856 u64 size = (lte) ? wim_resource_size(lte) : 0;
1857 ret = extract_resource_to_staging_dir(inode, stream_id,
1864 ret = alloc_wimfs_fd(inode, stream_id, lte, &fd,
1865 wimfs_ctx_readonly(ctx));
1869 if (lte && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
1872 raw_fd = open(lte->staging_file_name, fi->flags);
1874 int errno_save = errno;
1878 filedes_init(&fd->staging_fd, raw_fd);
1880 fi->fh = (uintptr_t)fd;
1884 /* Opens a directory. */
1886 wimfs_opendir(const char *path, struct fuse_file_info *fi)
1888 struct wim_inode *inode;
1890 struct wimfs_fd *fd = NULL;
1891 struct wimfs_context *ctx = wimfs_get_context();
1892 WIMStruct *wim = ctx->wim;
1894 inode = wim_pathname_to_inode(wim, path);
1897 if (!inode_is_directory(inode))
1899 ret = alloc_wimfs_fd(inode, 0, NULL, &fd, wimfs_ctx_readonly(ctx));
1900 fi->fh = (uintptr_t)fd;
1906 * Read data from a file in the WIM or in the staging directory.
1909 wimfs_read(const char *path, char *buf, size_t size,
1910 off_t offset, struct fuse_file_info *fi)
1912 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1923 res_size = wim_resource_size(fd->f_lte);
1927 if (offset > res_size)
1930 size = min(size, res_size - offset);
1934 switch (fd->f_lte->resource_location) {
1935 case RESOURCE_IN_STAGING_FILE:
1936 ret = raw_pread(&fd->staging_fd, buf, size, offset);
1940 case RESOURCE_IN_WIM:
1941 if (read_partial_wim_resource_into_buf(fd->f_lte, size,
1947 case RESOURCE_IN_ATTACHED_BUFFER:
1948 memcpy(buf, fd->f_lte->attached_buffer + offset, size);
1952 ERROR("Invalid resource location");
1959 struct fill_params {
1961 fuse_fill_dir_t filler;
1965 dentry_fuse_fill(struct wim_dentry *dentry, void *arg)
1967 struct fill_params *fill_params = arg;
1969 char *file_name_mbs;
1970 size_t file_name_mbs_nbytes;
1973 ret = utf16le_to_tstr(dentry->file_name,
1974 dentry->file_name_nbytes,
1976 &file_name_mbs_nbytes);
1980 ret = fill_params->filler(fill_params->buf, file_name_mbs, NULL, 0);
1981 FREE(file_name_mbs);
1985 /* Fills in the entries of the directory specified by @path using the
1986 * FUSE-provided function @filler. */
1988 wimfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
1989 off_t offset, struct fuse_file_info *fi)
1991 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1992 struct wim_inode *inode;
1997 inode = fd->f_inode;
1999 struct fill_params fill_params = {
2004 filler(buf, ".", NULL, 0);
2005 filler(buf, "..", NULL, 0);
2007 return for_dentry_in_rbtree(inode->i_children.rb_node,
2008 dentry_fuse_fill, &fill_params);
2013 wimfs_readlink(const char *path, char *buf, size_t buf_len)
2015 struct wimfs_context *ctx = wimfs_get_context();
2016 struct wim_inode *inode = wim_pathname_to_inode(ctx->wim, path);
2020 if (!inode_is_symlink(inode))
2023 return -ENAMETOOLONG;
2024 ret = wim_inode_readlink(inode, buf, buf_len - 1, NULL);
2026 wimlib_assert(ret <= buf_len - 1);
2029 } else if (ret == -ENAMETOOLONG) {
2030 buf[buf_len - 1] = '\0';
2037 wimfs_release(const char *path, struct fuse_file_info *fi)
2039 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2040 return close_wimfs_fd(fd);
2043 /* Close a directory */
2045 wimfs_releasedir(const char *path, struct fuse_file_info *fi)
2047 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2048 return close_wimfs_fd(fd);
2052 /* Remove an alternate data stream through the XATTR interface */
2054 wimfs_removexattr(const char *path, const char *name)
2056 struct wim_inode *inode;
2057 struct wim_ads_entry *ads_entry;
2059 struct wimfs_context *ctx = wimfs_get_context();
2061 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2064 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2068 inode = wim_pathname_to_inode(ctx->wim, path);
2072 ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2075 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2080 /* Renames a file or directory. See rename (3) */
2082 wimfs_rename(const char *from, const char *to)
2084 return rename_wim_path(wimfs_get_WIMStruct(), from, to);
2087 /* Remove a directory */
2089 wimfs_rmdir(const char *path)
2091 struct wim_dentry *dentry;
2092 WIMStruct *wim = wimfs_get_WIMStruct();
2094 dentry = get_dentry(wim, path);
2098 if (!dentry_is_directory(dentry))
2101 if (dentry_has_children(dentry))
2104 remove_dentry(dentry, wim->lookup_table);
2109 /* Write an alternate data stream through the XATTR interface */
2111 wimfs_setxattr(const char *path, const char *name,
2112 const char *value, size_t size, int flags)
2114 struct wim_ads_entry *existing_ads_entry;
2115 struct wim_inode *inode;
2117 struct wimfs_context *ctx = wimfs_get_context();
2120 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2123 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2127 inode = wim_pathname_to_inode(ctx->wim, path);
2131 existing_ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2132 if (existing_ads_entry) {
2133 if (flags & XATTR_CREATE)
2136 if (flags & XATTR_REPLACE)
2140 ret = inode_add_ads_with_data(inode, name, value,
2141 size, ctx->wim->lookup_table);
2143 if (existing_ads_entry)
2144 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2153 wimfs_symlink(const char *to, const char *from)
2155 struct fuse_context *fuse_ctx = fuse_get_context();
2156 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
2157 struct wim_dentry *dentry;
2160 ret = create_dentry(fuse_ctx, from, S_IFLNK | 0777,
2161 FILE_ATTRIBUTE_REPARSE_POINT, &dentry);
2163 dentry->d_inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
2164 ret = wim_inode_set_symlink(dentry->d_inode, to,
2165 wimfs_ctx->wim->lookup_table);
2167 remove_dentry(dentry, wimfs_ctx->wim->lookup_table);
2168 if (ret == WIMLIB_ERR_NOMEM)
2178 /* Reduce the size of a file */
2180 wimfs_truncate(const char *path, off_t size)
2182 struct wim_dentry *dentry;
2183 struct wim_lookup_table_entry *lte;
2187 struct wim_inode *inode;
2188 struct wimfs_context *ctx = wimfs_get_context();
2190 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
2191 &dentry, <e, &stream_idx);
2196 if (lte == NULL && size == 0)
2199 if (lte != NULL && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
2200 ret = truncate(lte->staging_file_name, size);
2204 lte->resource_entry.original_size = size;
2206 /* File in WIM. Extract it to the staging directory, but only
2207 * the first @size bytes of it. */
2208 struct wim_lookup_table_entry **back_ptr;
2210 inode = dentry->d_inode;
2211 if (stream_idx == 0) {
2213 back_ptr = &inode->i_lte;
2215 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
2216 back_ptr = &inode->i_ads_entries[stream_idx - 1].lte;
2218 ret = extract_resource_to_staging_dir(inode, stream_id,
2225 /* Unlink a non-directory or alternate data stream */
2227 wimfs_unlink(const char *path)
2229 struct wim_dentry *dentry;
2230 struct wim_lookup_table_entry *lte;
2233 struct wimfs_context *ctx = wimfs_get_context();
2235 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
2236 &dentry, <e, &stream_idx);
2241 if (stream_idx == 0)
2242 remove_dentry(dentry, ctx->wim->lookup_table);
2244 inode_remove_ads(dentry->d_inode, stream_idx - 1,
2245 ctx->wim->lookup_table);
2249 #ifdef HAVE_UTIMENSAT
2251 * Change the timestamp on a file dentry.
2253 * Note that alternate data streams do not have their own timestamps.
2256 wimfs_utimens(const char *path, const struct timespec tv[2])
2258 struct wim_dentry *dentry;
2259 struct wim_inode *inode;
2260 WIMStruct *wim = wimfs_get_WIMStruct();
2262 dentry = get_dentry(wim, path);
2265 inode = dentry->d_inode;
2267 if (tv[0].tv_nsec != UTIME_OMIT) {
2268 if (tv[0].tv_nsec == UTIME_NOW)
2269 inode->i_last_access_time = get_wim_timestamp();
2271 inode->i_last_access_time = timespec_to_wim_timestamp(tv[0]);
2273 if (tv[1].tv_nsec != UTIME_OMIT) {
2274 if (tv[1].tv_nsec == UTIME_NOW)
2275 inode->i_last_write_time = get_wim_timestamp();
2277 inode->i_last_write_time = timespec_to_wim_timestamp(tv[1]);
2281 #else /* HAVE_UTIMENSAT */
2283 wimfs_utime(const char *path, struct utimbuf *times)
2285 struct wim_dentry *dentry;
2286 struct wim_inode *inode;
2287 WIMStruct *wim = wimfs_get_WIMStruct();
2289 dentry = get_dentry(wim, path);
2292 inode = dentry->d_inode;
2294 inode->i_last_write_time = unix_timestamp_to_wim(times->modtime);
2295 inode->i_last_access_time = unix_timestamp_to_wim(times->actime);
2298 #endif /* !HAVE_UTIMENSAT */
2300 /* Writes to a file in the WIM filesystem.
2301 * It may be an alternate data stream, but here we don't even notice because we
2302 * just get a lookup table entry. */
2304 wimfs_write(const char *path, const char *buf, size_t size,
2305 off_t offset, struct fuse_file_info *fi)
2307 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2313 wimlib_assert(fd->f_lte != NULL);
2314 wimlib_assert(fd->f_lte->staging_file_name != NULL);
2315 wimlib_assert(filedes_valid(&fd->staging_fd));
2316 wimlib_assert(fd->f_inode != NULL);
2318 /* Write the data. */
2319 ret = raw_pwrite(&fd->staging_fd, buf, size, offset);
2323 /* Update file size */
2324 if (offset + size > fd->f_lte->resource_entry.original_size) {
2325 DEBUG("Update file size %"PRIu64 " => %"PRIu64"",
2326 fd->f_lte->resource_entry.original_size,
2328 fd->f_lte->resource_entry.original_size = offset + size;
2331 /* Update timestamps */
2332 touch_inode(fd->f_inode);
2336 static struct fuse_operations wimfs_operations = {
2337 .chmod = wimfs_chmod,
2338 .chown = wimfs_chown,
2339 .destroy = wimfs_destroy,
2340 .fgetattr = wimfs_fgetattr,
2341 .ftruncate = wimfs_ftruncate,
2342 .getattr = wimfs_getattr,
2344 .getxattr = wimfs_getxattr,
2348 .listxattr = wimfs_listxattr,
2350 .mkdir = wimfs_mkdir,
2351 .mknod = wimfs_mknod,
2353 .opendir = wimfs_opendir,
2355 .readdir = wimfs_readdir,
2356 .readlink = wimfs_readlink,
2357 .release = wimfs_release,
2358 .releasedir = wimfs_releasedir,
2360 .removexattr = wimfs_removexattr,
2362 .rename = wimfs_rename,
2363 .rmdir = wimfs_rmdir,
2365 .setxattr = wimfs_setxattr,
2367 .symlink = wimfs_symlink,
2368 .truncate = wimfs_truncate,
2369 .unlink = wimfs_unlink,
2370 #ifdef HAVE_UTIMENSAT
2371 .utimens = wimfs_utimens,
2373 .utime = wimfs_utime,
2375 .write = wimfs_write,
2377 /* wimfs keeps file descriptor structures (struct wimfs_fd), so there is
2378 * no need to have the file path provided on operations such as read()
2379 * where only the file descriptor is needed. */
2380 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2381 .flag_nullpath_ok = 1,
2383 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 9)
2385 .flag_utime_omit_ok = 1,
2390 /* API function documented in wimlib.h */
2392 wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
2393 int mount_flags, WIMStruct **additional_swms,
2394 unsigned num_additional_swms,
2395 const char *staging_dir)
2401 struct wim_image_metadata *imd;
2402 struct wimfs_context ctx;
2403 struct wim_inode *inode;
2405 DEBUG("Mount: wim = %p, image = %d, dir = %s, flags = %d, ",
2406 wim, image, dir, mount_flags);
2409 ret = WIMLIB_ERR_INVALID_PARAM;
2413 ret = verify_swm_set(wim, additional_swms, num_additional_swms);
2417 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2418 ret = can_delete_from_wim(wim);
2423 if (num_additional_swms)
2424 merge_lookup_tables(wim, additional_swms, num_additional_swms);
2426 ret = select_wim_image(wim, image);
2428 goto out_restore_lookup_table;
2430 DEBUG("Selected image %d", image);
2432 imd = wim_get_current_image_metadata(wim);
2434 if (imd->refcnt != 1) {
2435 ERROR("Cannot mount image that was just exported with "
2436 "wimlib_export_image()");
2437 ret = WIMLIB_ERR_INVALID_PARAM;
2438 goto out_restore_lookup_table;
2441 if (imd->modified) {
2442 ERROR("Cannot mount image that was added "
2443 "with wimlib_add_image()");
2444 ret = WIMLIB_ERR_INVALID_PARAM;
2445 goto out_restore_lookup_table;
2448 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2449 ret = lock_wim(wim, wim->in_fd.fd);
2451 goto out_restore_lookup_table;
2454 /* Use default stream interface if one was not specified */
2455 if (!(mount_flags & (WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_NONE |
2456 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR |
2457 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)))
2458 mount_flags |= WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR;
2460 DEBUG("Initializing struct wimfs_context");
2461 init_wimfs_context(&ctx);
2463 ctx.mount_flags = mount_flags;
2464 ctx.image_inode_list = &imd->inode_list;
2465 ctx.default_uid = getuid();
2466 ctx.default_gid = getgid();
2467 wimlib_assert(list_empty(&imd->unhashed_streams));
2468 ctx.wim->lookup_table->unhashed_streams = &imd->unhashed_streams;
2469 if (mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
2470 ctx.default_lookup_flags = LOOKUP_FLAG_ADS_OK;
2472 DEBUG("Unlinking message queues in case they already exist");
2473 ret = set_message_queue_names(&ctx, dir);
2476 unlink_message_queues(&ctx);
2478 DEBUG("Preparing arguments to fuse_main()");
2480 dir_copy = STRDUP(dir);
2482 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);
2575 out_restore_lookup_table:
2576 if (num_additional_swms)
2577 unmerge_lookup_table(wim);
2582 /* API function documented in wimlib.h */
2584 wimlib_unmount_image(const char *dir, int unmount_flags,
2585 wimlib_progress_func_t progress_func)
2588 struct wimfs_context wimfs_ctx;
2590 init_wimfs_context(&wimfs_ctx);
2592 ret = set_message_queue_names(&wimfs_ctx, dir);
2596 ret = open_message_queues(&wimfs_ctx, false);
2598 goto out_free_message_queue_names;
2600 ret = send_unmount_request_msg(wimfs_ctx.unmount_to_daemon_mq,
2602 progress_func != NULL);
2604 goto out_close_message_queues;
2606 ret = execute_fusermount(dir, (unmount_flags & WIMLIB_UNMOUNT_FLAG_LAZY) != 0);
2608 goto out_close_message_queues;
2610 struct unmount_msg_handler_context handler_ctx = {
2612 .timeout_seconds = 5,
2615 .progress_func = progress_func,
2618 ret = message_loop(wimfs_ctx.daemon_to_unmount_mq,
2619 &unmount_msg_handler_callbacks,
2622 ret = handler_ctx.status;
2623 out_close_message_queues:
2624 close_message_queues(&wimfs_ctx);
2625 out_free_message_queue_names:
2626 free_message_queue_names(&wimfs_ctx);
2631 #else /* WITH_FUSE */
2635 mount_unsupported_error(void)
2637 #if defined(__WIN32__)
2638 ERROR("Sorry-- Mounting WIM images is not supported on Windows!");
2640 ERROR("wimlib was compiled with --without-fuse, which disables support "
2641 "for mounting WIMs.");
2643 return WIMLIB_ERR_UNSUPPORTED;
2647 wimlib_unmount_image(const tchar *dir, int unmount_flags,
2648 wimlib_progress_func_t progress_func)
2650 return mount_unsupported_error();
2654 wimlib_mount_image(WIMStruct *wim, int image, const tchar *dir,
2655 int mount_flags, WIMStruct **additional_swms,
2656 unsigned num_additional_swms,
2657 const tchar *staging_dir)
2659 return mount_unsupported_error();
2662 #endif /* !WITH_FUSE */