X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fextract.c;h=a3942cf758109b20862612f866c9a1cadf1c3d4b;hp=87628d828d1aaa4991676bfe4f77839b14f9513a;hb=3cf06a471de65b5e69b44c41b95b1bbfb49ab55f;hpb=d977c5b4f348208e47fd2922f202f3eb60d5d5cb diff --git a/src/extract.c b/src/extract.c index 87628d82..a3942cf7 100644 --- a/src/extract.c +++ b/src/extract.c @@ -2,6 +2,11 @@ * extract.c * * Support for extracting WIM files. + * + * This code does NOT contain any filesystem-specific features. In particular, + * security information (i.e. file permissions) and alternate data streams are + * ignored, except possibly to read an alternate data stream that contains + * symbolic link data. */ /* @@ -11,154 +16,152 @@ * This file is part of wimlib, a library for working with WIM files. * * wimlib is free software; you can redistribute it and/or modify it under the - * terms of the GNU Lesser General Public License as published by the Free - * Software Foundation; either version 2.1 of the License, or (at your option) + * terms of the GNU General Public License as published by the Free + * Software Foundation; either version 3 of the License, or (at your option) * any later version. * * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more + * A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * - * You should have received a copy of the GNU Lesser General Public License + * You should have received a copy of the GNU General Public License * along with wimlib; if not, see http://www.gnu.org/licenses/. */ -#include "wimlib_internal.h" + +#include "config.h" + +#include +#include +#include +#include +#include +#include +#include + +#ifdef HAVE_UTIME_H +#include +#endif + + +#include + #include "dentry.h" #include "lookup_table.h" +#include "timestamp.h" +#include "wimlib_internal.h" #include "xml.h" -#include -#include -#include -#include -#include -#include #ifdef WITH_NTFS_3G #include -#include #endif -/* Sets and creates the directory to which files are to be extracted when - * extracting files from the WIM. */ -static int set_output_dir(WIMStruct *w, const char *dir) +static int extract_regular_file_linked(struct dentry *dentry, + const char *output_path, + struct apply_args *args, + struct lookup_table_entry *lte) { - char *p; - DEBUG("Setting output directory to `%s'", dir); + /* This mode overrides the normal hard-link extraction and + * instead either symlinks or hardlinks *all* identical files in + * the WIM, even if they are in a different image (in the case + * of a multi-image extraction) */ + + if (args->extract_flags & WIMLIB_EXTRACT_FLAG_HARDLINK) { + if (link(lte->extracted_file, output_path) != 0) { + ERROR_WITH_ERRNO("Failed to hard link " + "`%s' to `%s'", + output_path, lte->extracted_file); + return WIMLIB_ERR_LINK; + } + } else { + int num_path_components; + int num_output_dir_path_components; + size_t extracted_file_len; + char *p; + const char *p2; + size_t i; + + num_path_components = + get_num_path_components(dentry->full_path_utf8) - 1; + num_output_dir_path_components = + get_num_path_components(args->target); + + if (args->extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE) { + num_path_components++; + num_output_dir_path_components--; + } + extracted_file_len = strlen(lte->extracted_file); - p = STRDUP(dir); - if (!p) { - ERROR("Out of memory"); - return WIMLIB_ERR_NOMEM; - } + char buf[extracted_file_len + 3 * num_path_components + 1]; + p = &buf[0]; - if (mkdir(dir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) != 0) { - if (errno == EEXIST) { - DEBUG("`%s' already exists", dir); - goto done; + for (i = 0; i < num_path_components; i++) { + *p++ = '.'; + *p++ = '.'; + *p++ = '/'; + } + p2 = lte->extracted_file; + while (*p2 == '/') + p2++; + while (num_output_dir_path_components--) + p2 = path_next_part(p2, NULL); + strcpy(p, p2); + if (symlink(buf, output_path) != 0) { + ERROR_WITH_ERRNO("Failed to symlink `%s' to " + "`%s'", + buf, lte->extracted_file); + return WIMLIB_ERR_LINK; } - ERROR_WITH_ERRNO("Cannot create directory `%s'", dir); - FREE(p); - return WIMLIB_ERR_MKDIR; - } else { - DEBUG("Created directory `%s'", dir); } -done: - FREE(w->output_dir); - w->output_dir = p; return 0; } -/* - * Extracts a regular file from the WIM archive. - * - * @dentry: The directory entry for the file, which must be a - * regular file. - * @output_path: The path to which the file is to be extracted. - * @lookup_table: The lookup table for the WIM file. - * @wim_fp: The FILE* for the WIM, opened for reading. - * @wim_ctype: The type of compression used in the WIM. - * @link_type: One of WIM_LINK_TYPE_*; specifies what to do with - * files that are hard-linked inside the WIM. - * @is_multi_image_extraction: - * True if the image currently being extracted is just one - * image of a multi-image extraction. This is needed so - * that cross-image symbolic links can be created - * correctly. - */ -static int extract_regular_file(WIMStruct *w, - const struct dentry *dentry, - const char *output_path, - int extract_flags) +static int extract_regular_file_unlinked(struct dentry *dentry, + struct apply_args *args, + const char *output_path, + struct lookup_table_entry *lte) { - struct lookup_table_entry *lte; - int ret; - int out_fd; - const struct resource_entry *res_entry; + /* Normal mode of extraction. Regular files and hard links are + * extracted in the way that they appear in the WIM. */ - lte = __lookup_resource(w->lookup_table, dentry_hash(dentry)); + int out_fd; + int ret; + struct inode *inode = dentry->d_inode; - /* If we already extracted the same file or a hard link copy of it, we - * may be able to simply create a link. The exact action is specified - * by the current @link_type. */ - if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) && - lte && lte->out_refcnt != 0) + if (!((args->extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE) + && (args->extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | + WIMLIB_EXTRACT_FLAG_HARDLINK)))) { - wimlib_assert(lte->file_on_disk); - - if (extract_flags & WIMLIB_EXTRACT_FLAG_HARDLINK) { - if (link(lte->file_on_disk, output_path) != 0) { - ERROR_WITH_ERRNO("Failed to hard link " - "`%s' to `%s'", - output_path, lte->file_on_disk); - return WIMLIB_ERR_LINK; + /* If the dentry is one of a hard link set of at least 2 + * dentries and one of the other dentries has already been + * extracted, make a hard link to the file corresponding to this + * already-extracted directory. Otherwise, extract the file, + * and set the inode->extracted_file field so that other + * dentries in the hard link group can link to it. */ + if (inode->link_count > 1) { + if (inode->extracted_file) { + DEBUG("Extracting hard link `%s' => `%s'", + output_path, inode->extracted_file); + if (link(inode->extracted_file, output_path) != 0) { + ERROR_WITH_ERRNO("Failed to hard link " + "`%s' to `%s'", + output_path, + inode->extracted_file); + return WIMLIB_ERR_LINK; + } + return 0; } - } else { - int num_path_components; - int num_output_dir_path_components; - size_t file_on_disk_len; - char *p; - const char *p2; - size_t i; - - num_path_components = - get_num_path_components(dentry->full_path_utf8) - 1; - num_output_dir_path_components = - get_num_path_components(w->output_dir); - - if (w->is_multi_image_extraction) { - num_path_components++; - num_output_dir_path_components--; + FREE(inode->extracted_file); + inode->extracted_file = STRDUP(output_path); + if (!inode->extracted_file) { + ERROR("Failed to allocate memory for filename"); + return WIMLIB_ERR_NOMEM; } - file_on_disk_len = strlen(lte->file_on_disk); - - char buf[file_on_disk_len + 3 * num_path_components + 1]; - p = &buf[0]; - - for (i = 0; i < num_path_components; i++) { - *p++ = '.'; - *p++ = '.'; - *p++ = '/'; - } - p2 = lte->file_on_disk; - while (*p2 == '/') - p2++; - while (num_output_dir_path_components--) - p2 = path_next_part(p2, NULL); - strcpy(p, p2); - if (symlink(buf, output_path) != 0) { - ERROR_WITH_ERRNO("Failed to symlink `%s' to " - "`%s'", - buf, lte->file_on_disk); - return WIMLIB_ERR_LINK; - } - } - return 0; - } + } - /* Otherwise, we must actually extract the file contents. */ + /* Extract the contents of the file to @output_path. */ out_fd = open(output_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); if (out_fd == -1) { @@ -167,41 +170,62 @@ static int extract_regular_file(WIMStruct *w, return WIMLIB_ERR_OPEN; } - /* Extract empty file, with no lookup table entry... */ if (!lte) { + /* Empty file with no lookup table entry */ DEBUG("Empty file `%s'.", output_path); ret = 0; - goto done; + goto out; } - res_entry = <e->resource_entry; - - ret = extract_resource_to_fd(w, res_entry, out_fd, - res_entry->original_size); - + ret = extract_full_wim_resource_to_fd(lte, out_fd); if (ret != 0) { ERROR("Failed to extract resource to `%s'", output_path); - goto done; + goto out; + } + args->progress.extract.completed_bytes += wim_resource_size(lte); +out: + if (close(out_fd) != 0) { + ERROR_WITH_ERRNO("Failed to close file `%s'", output_path); + ret = WIMLIB_ERR_WRITE; } - - /* Mark the lookup table entry to indicate this file has been extracted. */ - lte->out_refcnt++; - FREE(lte->file_on_disk); - lte->file_on_disk = STRDUP(output_path); - if (lte->file_on_disk) - ret = 0; - else - ret = WIMLIB_ERR_NOMEM; -done: - close(out_fd); return ret; } -static int extract_symlink(const struct dentry *dentry, const char *output_path, - const WIMStruct *w) +/* + * Extracts a regular file from the WIM archive. + */ +static int extract_regular_file(struct dentry *dentry, + struct apply_args *args, + const char *output_path) +{ + struct lookup_table_entry *lte; + const struct inode *inode = dentry->d_inode; + + lte = inode_unnamed_lte_resolved(inode); + + if (lte && (args->extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | + WIMLIB_EXTRACT_FLAG_HARDLINK))) + { + if (lte->extracted_file) { + return extract_regular_file_linked(dentry, output_path, args, lte); + } else { + lte->extracted_file = STRDUP(output_path); + if (!lte->extracted_file) + return WIMLIB_ERR_NOMEM; + } + } + return extract_regular_file_unlinked(dentry, args, output_path, lte); +} + +static int extract_symlink(struct dentry *dentry, + struct apply_args *args, + const char *output_path) { char target[4096]; - ssize_t ret = dentry_readlink(dentry, target, sizeof(target), w); + ssize_t ret = inode_readlink(dentry->d_inode, target, + sizeof(target), args->w, 0); + struct lookup_table_entry *lte; + if (ret <= 0) { ERROR("Could not read the symbolic link from dentry `%s'", dentry->full_path_utf8); @@ -213,183 +237,549 @@ static int extract_symlink(const struct dentry *dentry, const char *output_path, output_path, target); return WIMLIB_ERR_LINK; } + lte = inode_unnamed_lte_resolved(dentry->d_inode); + args->progress.extract.completed_bytes += wim_resource_size(lte); return 0; } -/* - * Extracts a directory from the WIM archive. +/* + * Extracts a directory from the WIM archive. * * @dentry: The directory entry for the directory. * @output_path: The path to which the directory is to be extracted to. - * @return: True on success, false on failure. + * @return: True on success, false on failure. */ -static int extract_directory(struct dentry *dentry, const char *output_path) +static int extract_directory(const char *output_path, bool is_root) { - /* Compute the output path directory to the directory. */ - if (mkdir(output_path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) != 0) - { - switch (errno) { - case EEXIST: /* Already existing directory is OK */ - case EACCES: /* We may have permissions to extract files inside - the directory, but not for the directory - itself. */ + int ret; + struct stat stbuf; + ret = stat(output_path, &stbuf); + if (ret == 0) { + if (S_ISDIR(stbuf.st_mode)) { + /*if (!is_root)*/ + /*WARNING("`%s' already exists", output_path);*/ return 0; - default: - ERROR_WITH_ERRNO("Cannot create directory `%s'", - output_path); + } else { + ERROR("`%s' is not a directory", output_path); return WIMLIB_ERR_MKDIR; } + } else { + if (errno != ENOENT) { + ERROR_WITH_ERRNO("Failed to stat `%s'", output_path); + return WIMLIB_ERR_STAT; + } + } + /* Compute the output path directory to the directory. */ + if (mkdir(output_path, S_IRWXU | S_IRGRP | S_IXGRP | + S_IROTH | S_IXOTH) != 0) { + ERROR_WITH_ERRNO("Cannot create directory `%s'", + output_path); + return WIMLIB_ERR_MKDIR; } return 0; } -struct extract_args { - WIMStruct *w; - int extract_flags; -#ifdef WITH_NTFS_3G - struct SECURITY_API *scapi; -#endif -}; - -/* - * Extracts a file or directory from the WIM archive. For use in - * for_dentry_in_tree(). - * - * @dentry: The dentry to extract. - * @arg: A pointer to the WIMStruct for the WIM file. +/* + * Extracts a file, directory, or symbolic link from the WIM archive. For use + * in for_dentry_in_tree(). */ -static int extract_dentry(struct dentry *dentry, void *arg) +static int apply_dentry_normal(struct dentry *dentry, void *arg) { - struct extract_args *args = arg; - WIMStruct *w = args->w; + struct apply_args *args = arg; int extract_flags = args->extract_flags; - size_t len = strlen(w->output_dir); + struct inode *inode = dentry->d_inode; + size_t len; + int ret; + + if (dentry->is_extracted) + return 0; + + if (extract_flags & WIMLIB_EXTRACT_FLAG_NO_STREAMS) + if (inode_unnamed_lte_resolved(inode)) + return 0; + + if ((extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE) && + args->progress_func) + { + args->progress.extract.cur_path = dentry->full_path_utf8; + args->progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DENTRY, + &args->progress); + } + + len = strlen(args->target); char output_path[len + dentry->full_path_utf8_len + 1]; - int ret = 0; + memcpy(output_path, args->target, len); + memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len); + output_path[len + dentry->full_path_utf8_len] = '\0'; - if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE) - puts(dentry->full_path_utf8); + if (inode_is_symlink(inode)) + ret = extract_symlink(dentry, args, output_path); + else if (inode_is_directory(inode)) + ret = extract_directory(output_path, false); + else + ret = extract_regular_file(dentry, args, output_path); + if (ret == 0) + dentry->is_extracted = 1; + return ret; +} - memcpy(output_path, w->output_dir, len); +/* Apply timestamp to extracted file */ +static int apply_dentry_timestamps_normal(struct dentry *dentry, void *arg) +{ + struct apply_args *args = arg; + size_t len = strlen(args->target); + char output_path[len + dentry->full_path_utf8_len + 1]; + const struct inode *inode = dentry->d_inode; + int ret; + + memcpy(output_path, args->target, len); memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len); output_path[len + dentry->full_path_utf8_len] = '\0'; - if (dentry_is_symlink(dentry)) { - ret = extract_symlink(dentry, output_path, w); - } else if (dentry_is_directory(dentry)) { - if (!dentry_is_root(dentry)) /* Root doesn't need to be extracted. */ - ret = extract_directory(dentry, output_path); - } else { - ret = extract_regular_file(w, dentry, output_path, extract_flags); + struct timeval tv[2]; + wim_timestamp_to_timeval(inode->last_access_time, &tv[0]); + wim_timestamp_to_timeval(inode->last_write_time, &tv[1]); + #ifdef HAVE_LUTIMES + ret = lutimes(output_path, tv); + #else + ret = -1; + errno = ENOSYS; + #endif + if (ret != 0) { + #ifdef HAVE_UTIME + if (errno == ENOSYS) { + struct utimbuf buf; + buf.actime = wim_timestamp_to_unix(inode->last_access_time); + buf.modtime = wim_timestamp_to_unix(inode->last_write_time); + if (utime(output_path, &buf) == 0) + return 0; + } + #endif + if (errno != ENOSYS || args->num_lutimes_warnings < 10) { + /*WARNING("Failed to set timestamp on file `%s': %s",*/ + /*output_path, strerror(errno));*/ + args->num_lutimes_warnings++; + } + } + return 0; +} + +static int cmp_streams_by_wim_position(const void *p1, const void *p2) +{ + const struct lookup_table_entry *lte1, *lte2; + lte1 = *(const struct lookup_table_entry**)p1; + lte2 = *(const struct lookup_table_entry**)p2; + if (lte1->resource_entry.offset < lte2->resource_entry.offset) + return -1; + else if (lte1->resource_entry.offset > lte2->resource_entry.offset) + return 1; + else + return 0; +} + +static int sort_stream_list_by_wim_position(struct list_head *stream_list) +{ + struct list_head *cur; + size_t num_streams; + struct lookup_table_entry **array; + size_t i; + size_t array_size; + + num_streams = 0; + list_for_each(cur, stream_list) + num_streams++; + array_size = num_streams * sizeof(array[0]); + array = MALLOC(array_size); + if (!array) { + ERROR("Failed to allocate %zu bytes to sort stream entries", + array_size); + return WIMLIB_ERR_NOMEM; + } + cur = stream_list->next; + for (i = 0; i < num_streams; i++) { + array[i] = container_of(cur, struct lookup_table_entry, staging_list); + cur = cur->next; } + + qsort(array, num_streams, sizeof(array[0]), cmp_streams_by_wim_position); + + INIT_LIST_HEAD(stream_list); + for (i = 0; i < num_streams; i++) + list_add_tail(&array[i]->staging_list, stream_list); + FREE(array); + return 0; } +static void calculate_bytes_to_extract(struct list_head *stream_list, + int extract_flags, + union wimlib_progress_info *progress) +{ + struct lookup_table_entry *lte; + struct inode *inode; + u64 total_bytes = 0; + u64 num_streams = 0; + + /* For each stream to be extracted... */ + list_for_each_entry(lte, stream_list, staging_list) { + if (extract_flags & + (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) + { + /* In the symlink or hard link extraction mode, each + * stream will be extracted one time regardless of how + * many dentries share the stream. */ + wimlib_assert(!(extract_flags & WIMLIB_EXTRACT_FLAG_NTFS)); + if (!lte->extracted_file) { + num_streams++; + total_bytes += wim_resource_size(lte); + } + } else { + list_for_each_entry(inode, <e->inode_list, + lte_inode_list) + { + num_streams++; + total_bytes += wim_resource_size(lte); + } + } + } + progress->extract.num_streams = num_streams; + progress->extract.total_bytes = total_bytes; + progress->extract.completed_bytes = 0; +} + +static void maybe_add_stream_for_extraction(struct lookup_table_entry *lte, + struct list_head *stream_list) +{ + if (lte->out_refcnt == 0) { + lte->out_refcnt = 1; + INIT_LIST_HEAD(<e->inode_list); + list_add_tail(<e->staging_list, stream_list); + } +} -static int extract_single_image(WIMStruct *w, int image, int extract_flags) +static void inode_find_streams_for_extraction(struct inode *inode, + struct list_head *stream_list, + int extract_flags) { - DEBUG("Extracting image %d", image); + struct lookup_table_entry *lte; + bool inode_added = false; + + lte = inode_unnamed_lte_resolved(inode); + if (lte) { + maybe_add_stream_for_extraction(lte, stream_list); + list_add_tail(&inode->lte_inode_list, <e->inode_list); + inode_added = true; + } +#ifdef WITH_NTFS_3G + if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) { + for (unsigned i = 0; i < inode->num_ads; i++) { + if (inode->ads_entries[i].stream_name_len != 0) { + lte = inode_stream_lte_resolved(inode, i + 1); + if (lte) { + maybe_add_stream_for_extraction(lte, + stream_list); + if (!inode_added) { + list_add_tail(&inode->lte_inode_list, + <e->inode_list); + inode_added = true; + } + } + } + } + } +#endif +} + +static void find_streams_for_extraction(struct hlist_head *inode_list, + struct list_head *stream_list, + struct lookup_table *lookup_table, + int extract_flags) +{ + struct inode *inode; + struct hlist_node *cur; + struct dentry *dentry; + + for_lookup_table_entry(lookup_table, lte_zero_out_refcnt, NULL); + INIT_LIST_HEAD(stream_list); + hlist_for_each_entry(inode, cur, inode_list, hlist) { + if (!inode->resolved) + inode_resolve_ltes(inode, lookup_table); + inode_for_each_dentry(dentry, inode) + dentry->is_extracted = 0; + inode_find_streams_for_extraction(inode, stream_list, + extract_flags); + } +} + +struct apply_operations { + int (*apply_dentry)(struct dentry *dentry, void *arg); + int (*apply_dentry_timestamps)(struct dentry *dentry, void *arg); +}; + +static const struct apply_operations normal_apply_operations = { + .apply_dentry = apply_dentry_normal, + .apply_dentry_timestamps = apply_dentry_timestamps_normal, +}; + +#ifdef WITH_NTFS_3G +static const struct apply_operations ntfs_apply_operations = { + .apply_dentry = wim_apply_dentry_ntfs, + .apply_dentry_timestamps = wim_apply_dentry_timestamps, +}; +#endif + +static int apply_stream_list(struct list_head *stream_list, + struct apply_args *args, + const struct apply_operations *ops, + wimlib_progress_func_t progress_func) +{ + uint64_t bytes_per_progress = args->progress.extract.total_bytes / 100; + uint64_t next_progress = bytes_per_progress; + struct lookup_table_entry *lte; + struct inode *inode; + struct dentry *dentry; + int ret = 0; + list_for_each_entry(lte, stream_list, staging_list) { + list_for_each_entry(inode, <e->inode_list, lte_inode_list) { + inode_for_each_dentry(dentry, inode) { + ret = ops->apply_dentry(dentry, args); + if (ret != 0) + goto out; + if (args->progress.extract.completed_bytes >= next_progress) { + progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS, + &args->progress); + next_progress += bytes_per_progress; + } + } + } + } +out: + return ret; +} + +static int extract_single_image(WIMStruct *w, int image, + const char *target, int extract_flags, + wimlib_progress_func_t progress_func) +{ int ret; - ret = wimlib_select_image(w, image); + struct list_head stream_list; + struct hlist_head *inode_list; + + struct apply_args args; + const struct apply_operations *ops; + + args.w = w; + args.target = target; + args.extract_flags = extract_flags; + args.num_lutimes_warnings = 0; + args.target = target; + args.stream_list = &stream_list; + args.progress_func = progress_func; + + if (progress_func) { + args.progress.extract.image = image; + args.progress.extract.image_name = wimlib_get_image_name(w, image); + args.progress.extract.target = target; + } + +#ifdef WITH_NTFS_3G + if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) { + args.vol = ntfs_mount(target, 0); + if (!args.vol) { + ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s'", target); + return WIMLIB_ERR_NTFS_3G; + } + } +#endif + +#ifdef WITH_NTFS_3G + if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) + ops = &ntfs_apply_operations; + else +#endif + ops = &normal_apply_operations; + + ret = select_wim_image(w, image); if (ret != 0) - return ret; + goto out; - struct extract_args args = { - .w = w, - .extract_flags = extract_flags, - #ifdef WITH_NTFS_3G - .scapi = NULL - #endif - }; + inode_list = &w->image_metadata[image - 1].inode_list; + find_streams_for_extraction(inode_list, + &stream_list, + w->lookup_table, + extract_flags); - return for_dentry_in_tree(wim_root_dentry(w), extract_dentry, &args); + calculate_bytes_to_extract(&stream_list, extract_flags, + &args.progress); + + if (progress_func) { + progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN, + &args.progress); + } + + if (extract_flags & WIMLIB_EXTRACT_FLAG_SEQUENTIAL) { + ret = sort_stream_list_by_wim_position(&stream_list); + if (ret != 0) { + WARNING("Falling back to non-sequential extraction"); + extract_flags &= ~WIMLIB_EXTRACT_FLAG_SEQUENTIAL; + } + } + + if (progress_func) { + progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_BEGIN, + &args.progress); + } + + + args.extract_flags |= WIMLIB_EXTRACT_FLAG_NO_STREAMS; + ret = for_dentry_in_tree(wim_root_dentry(w), ops->apply_dentry, &args); + args.extract_flags &= ~WIMLIB_EXTRACT_FLAG_NO_STREAMS; + if (ret != 0) + goto out; + + if (progress_func) { + progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_END, + &args.progress); + } + + ret = apply_stream_list(&stream_list, &args, ops, progress_func); + if (ret != 0) + goto out; + + if (progress_func) + progress_func(WIMLIB_PROGRESS_MSG_APPLY_TIMESTAMPS, NULL); + + ret = for_dentry_in_tree_depth(wim_root_dentry(w), + ops->apply_dentry_timestamps, &args); + if (ret != 0) + goto out; + + if (progress_func) { + progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END, + &args.progress); + } +out: +#ifdef WITH_NTFS_3G + if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) { + if (ntfs_umount(args.vol, FALSE) != 0) { + ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", args.target); + if (ret == 0) + ret = WIMLIB_ERR_NTFS_3G; + } + } +#endif + return ret; } -/* Extracts all images from the WIM to w->output_dir, with the images placed in +/* Extracts all images from the WIM to @output_dir, with the images placed in * subdirectories named by their image names. */ -static int extract_all_images(WIMStruct *w, int extract_flags) +static int extract_all_images(WIMStruct *w, const char *target, + int extract_flags, + wimlib_progress_func_t progress_func) { size_t image_name_max_len = max(xml_get_max_image_name_len(w), 20); - size_t output_path_len = strlen(w->output_dir); + size_t output_path_len = strlen(target); char buf[output_path_len + 1 + image_name_max_len + 1]; int ret; int image; const char *image_name; - DEBUG("Attempting to extract all images from `%s'", w->filename); + ret = extract_directory(target, true); + if (ret != 0) + return ret; - memcpy(buf, w->output_dir, output_path_len); + memcpy(buf, target, output_path_len); buf[output_path_len] = '/'; for (image = 1; image <= w->hdr.image_count; image++) { - image_name = wimlib_get_image_name(w, image); - if (*image_name) { + if (image_name && *image_name) { strcpy(buf + output_path_len + 1, image_name); } else { /* Image name is empty. Use image number instead */ sprintf(buf + output_path_len + 1, "%d", image); } - ret = set_output_dir(w, buf); + ret = extract_single_image(w, image, buf, extract_flags, + progress_func); if (ret != 0) - goto done; - ret = extract_single_image(w, image, extract_flags); - if (ret != 0) - goto done; + return ret; } -done: - /* Restore original output directory */ - buf[output_path_len + 1] = '\0'; return 0; } /* Extracts a single image or all images from a WIM file. */ WIMLIBAPI int wimlib_extract_image(WIMStruct *w, int image, - const char *output_dir, int flags) + const char *target, + int extract_flags, + WIMStruct **additional_swms, + unsigned num_additional_swms, + wimlib_progress_func_t progress_func) { + struct lookup_table *joined_tab, *w_tab_save; int ret; - if (!output_dir) + + if (!w || !target) return WIMLIB_ERR_INVALID_PARAM; - if ((flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) + + extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC; + + if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) == (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) return WIMLIB_ERR_INVALID_PARAM; - - ret = set_output_dir(w, output_dir); - if (ret != 0) - return ret; - if ((flags & WIMLIB_EXTRACT_FLAG_NTFS)) { - #ifdef WITH_NTFS_3G - unsigned long mnt_flags; - ret = ntfs_check_if_mounted(output_dir, &mnt_flags); - if (ret != 0) { - ERROR_WITH_ERRNO("NTFS-3g: Cannot determine if `%s' " - "is mounted", output_dir); - return WIMLIB_ERR_NTFS_3G; + if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) { +#ifdef WITH_NTFS_3G + if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))) { + ERROR("Cannot specify symlink or hardlink flags when applying "); + ERROR("directly to a NTFS volume"); + return WIMLIB_ERR_INVALID_PARAM; } - if (!(mnt_flags & NTFS_MF_MOUNTED)) { - ERROR("NTFS-3g: Filesystem on `%s' is not mounted ", - output_dir); + if (image == WIMLIB_ALL_IMAGES) { + ERROR("Can only apply a single image when applying " + "directly to a NTFS volume"); + return WIMLIB_ERR_INVALID_PARAM; } - if (mnt_flags & NTFS_MF_READONLY) { - ERROR("NTFS-3g: Filesystem on `%s' is mounted " - "read-only", output_dir); - return WIMLIB_ERR_NTFS_3G; - } - #else +#else ERROR("wimlib was compiled without support for NTFS-3g, so"); - ERROR("we cannot extract a WIM image while preserving NTFS-"); - ERROR("specific information"); + ERROR("we cannot apply a WIM image directly to a NTFS volume"); return WIMLIB_ERR_UNSUPPORTED; - #endif +#endif + } + + ret = verify_swm_set(w, additional_swms, num_additional_swms); + if (ret != 0) + return ret; + + if (num_additional_swms) { + ret = new_joined_lookup_table(w, additional_swms, + num_additional_swms, &joined_tab); + if (ret != 0) + return ret; + w_tab_save = w->lookup_table; + w->lookup_table = joined_tab; } - if (image == WIM_ALL_IMAGES) { - w->is_multi_image_extraction = true; - ret = extract_all_images(w, flags); + + if (image == WIMLIB_ALL_IMAGES) { + extract_flags |= WIMLIB_EXTRACT_FLAG_MULTI_IMAGE; + ret = extract_all_images(w, target, extract_flags, + progress_func); } else { - w->is_multi_image_extraction = false; - ret = extract_single_image(w, image, flags); + extract_flags &= ~WIMLIB_EXTRACT_FLAG_MULTI_IMAGE; + ret = extract_single_image(w, image, target, extract_flags, + progress_func); } - return ret; + if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | + WIMLIB_EXTRACT_FLAG_HARDLINK)) + { + for_lookup_table_entry(w->lookup_table, + lte_free_extracted_file, + NULL); + } + + if (num_additional_swms) { + free_lookup_table(w->lookup_table); + w->lookup_table = w_tab_save; + } + return ret; }