* 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.
*/
/*
* 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 "config.h"
+
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
+
+#ifdef HAVE_UTIME_H
+#include <utime.h>
+#endif
+
#include <unistd.h>
-#include "config.h"
#include "dentry.h"
#include "lookup_table.h"
#include "timestamp.h"
#include "wimlib_internal.h"
#include "xml.h"
-#ifdef WITH_NTFS_3G
-#include <ntfs-3g/volume.h>
-#include <ntfs-3g/security.h>
-#endif
-
-
/* Internal */
#define WIMLIB_EXTRACT_FLAG_MULTI_IMAGE 0x80000000
-static int extract_regular_file_linked(const struct dentry *dentry,
+static int extract_regular_file_linked(const struct dentry *dentry,
const char *output_dir,
const char *output_path,
int extract_flags,
* 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) */
-
- wimlib_assert(lte->file_on_disk);
-
+ wimlib_assert(lte->extracted_file);
if (extract_flags & WIMLIB_EXTRACT_FLAG_HARDLINK) {
- if (link(lte->file_on_disk, output_path) != 0) {
+ if (link(lte->extracted_file, output_path) != 0) {
ERROR_WITH_ERRNO("Failed to hard link "
"`%s' to `%s'",
- output_path, lte->file_on_disk);
+ output_path, lte->extracted_file);
return WIMLIB_ERR_LINK;
}
} else {
int num_path_components;
int num_output_dir_path_components;
- size_t file_on_disk_len;
+ size_t extracted_file_len;
char *p;
const char *p2;
size_t i;
wimlib_assert(extract_flags & WIMLIB_EXTRACT_FLAG_SYMLINK);
- num_path_components =
+ num_path_components =
get_num_path_components(dentry->full_path_utf8) - 1;
num_output_dir_path_components =
get_num_path_components(output_dir);
num_path_components++;
num_output_dir_path_components--;
}
- file_on_disk_len = strlen(lte->file_on_disk);
+ extracted_file_len = strlen(lte->extracted_file);
- char buf[file_on_disk_len + 3 * num_path_components + 1];
+ char buf[extracted_file_len + 3 * num_path_components + 1];
p = &buf[0];
for (i = 0; i < num_path_components; i++) {
*p++ = '.';
*p++ = '/';
}
- p2 = lte->file_on_disk;
+ p2 = lte->extracted_file;
while (*p2 == '/')
p2++;
while (num_output_dir_path_components--)
if (symlink(buf, output_path) != 0) {
ERROR_WITH_ERRNO("Failed to symlink `%s' to "
"`%s'",
- buf, lte->file_on_disk);
+ buf, lte->extracted_file);
return WIMLIB_ERR_LINK;
}
}
static int extract_regular_file_unlinked(WIMStruct *w,
- struct dentry *dentry,
+ struct dentry *dentry,
const char *output_path,
int extract_flags,
struct lookup_table_entry *lte)
* extracted in the way that they appear in the WIM. */
int out_fd;
- const struct resource_entry *res_entry;
int ret;
- const struct list_head *head = &dentry->link_group_list;
-
- if (head->next != head) {
- /* This dentry is one of a hard link set of at least 2 dentries.
- * If 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 dentry->extracted_file field so that other
+ struct inode *inode = dentry->d_inode;
+
+ if (!((extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE)
+ && (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
+ WIMLIB_EXTRACT_FLAG_HARDLINK))))
+ {
+ /* 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. */
- struct dentry *other;
- list_for_each_entry(other, head, link_group_list) {
- if (other->extracted_file) {
+ if (inode->link_count > 1) {
+ if (inode->extracted_file) {
DEBUG("Extracting hard link `%s' => `%s'",
- output_path, other->extracted_file);
- if (link(other->extracted_file, output_path) != 0) {
+ 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,
- other->extracted_file);
+ inode->extracted_file);
return WIMLIB_ERR_LINK;
}
return 0;
}
- }
- FREE(dentry->extracted_file);
- dentry->extracted_file = STRDUP(output_path);
- if (!dentry->extracted_file) {
- ERROR("Failed to allocate memory for filename");
- return WIMLIB_ERR_NOMEM;
+ 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;
+ }
}
}
/* 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;
}
- if (extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE) {
- /* 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 = WIMLIB_ERR_NOMEM;
- }
-done:
+out:
if (close(out_fd) != 0) {
ERROR_WITH_ERRNO("Failed to close file `%s'", output_path);
ret = WIMLIB_ERR_WRITE;
return ret;
}
-/*
- * Extracts a regular file from the WIM archive.
+/*
+ * Extracts a regular file from the WIM archive.
*/
-static int extract_regular_file(WIMStruct *w,
- struct dentry *dentry,
+static int extract_regular_file(WIMStruct *w,
+ struct dentry *dentry,
const char *output_dir,
const char *output_path,
int extract_flags)
{
struct lookup_table_entry *lte;
+ const struct inode *inode = dentry->d_inode;
- lte = dentry_first_lte(dentry, w->lookup_table);
+ lte = inode_unnamed_lte(inode, w->lookup_table);
if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
WIMLIB_EXTRACT_FLAG_HARDLINK)) && lte) {
- if (lte->out_refcnt++ != 0)
+ if (lte->extracted_file) {
return extract_regular_file_linked(dentry, output_dir,
output_path,
extract_flags, lte);
- lte->file_on_disk = STRDUP(output_path);
- if (!lte->file_on_disk)
- return WIMLIB_ERR_NOMEM;
+ } else {
+ lte->extracted_file = STRDUP(output_path);
+ if (!lte->extracted_file)
+ return WIMLIB_ERR_NOMEM;
+ }
}
return extract_regular_file_unlinked(w, dentry, output_path,
const WIMStruct *w)
{
char target[4096];
- ssize_t ret = dentry_readlink(dentry, target, sizeof(target), w);
+ ssize_t ret = inode_readlink(dentry->d_inode, target,
+ sizeof(target), w, 0);
if (ret <= 0) {
ERROR("Could not read the symbolic link from dentry `%s'",
dentry->full_path_utf8);
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(const char *output_path)
+static int extract_directory(const char *output_path, bool is_root)
{
int ret;
struct stat stbuf;
ret = stat(output_path, &stbuf);
if (ret == 0) {
if (S_ISDIR(stbuf.st_mode)) {
- WARNING("`%s' already exists", output_path);
+ if (!is_root)
+ WARNING("`%s' already exists", output_path);
return 0;
} else {
ERROR("`%s' is not a directory", output_path);
WIMStruct *w;
int extract_flags;
const char *output_dir;
-#ifdef WITH_NTFS_3G
- struct SECURITY_API *scapi;
-#endif
+ unsigned num_lutimes_warnings;
};
-/*
+/*
* Extracts a file, directory, or symbolic link from the WIM archive. For use
* in for_dentry_in_tree().
*/
int extract_flags = args->extract_flags;
size_t len = strlen(args->output_dir);
char output_path[len + dentry->full_path_utf8_len + 1];
- int ret;
if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE) {
wimlib_assert(dentry->full_path_utf8);
output_path[len + dentry->full_path_utf8_len] = '\0';
if (dentry_is_symlink(dentry))
- ret = extract_symlink(dentry, output_path, w);
+ return extract_symlink(dentry, output_path, w);
else if (dentry_is_directory(dentry))
- ret = extract_directory(output_path);
+ return extract_directory(output_path, dentry_is_root(dentry));
else
- ret = extract_regular_file(w, dentry, args->output_dir,
+ return extract_regular_file(w, dentry, args->output_dir,
output_path, extract_flags);
- if (ret != 0)
- return ret;
-
- return 0;
}
+/* Apply timestamp to extracted file */
static int apply_dentry_timestamps(struct dentry *dentry, void *arg)
{
struct extract_args *args = arg;
size_t len = strlen(args->output_dir);
char output_path[len + dentry->full_path_utf8_len + 1];
+ const struct inode *inode = dentry->d_inode;
+ int ret;
memcpy(output_path, args->output_dir, len);
memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len);
output_path[len + dentry->full_path_utf8_len] = '\0';
struct timeval tv[2];
- wim_timestamp_to_timeval(dentry->last_access_time, &tv[0]);
- wim_timestamp_to_timeval(dentry->last_write_time, &tv[1]);
- if (lutimes(output_path, tv) != 0) {
- WARNING("Failed to set timestamp on file `%s': %s",
- output_path, strerror(errno));
+ 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;
}
DEBUG("Extracting image %d", image);
int ret;
- ret = wimlib_select_image(w, image);
+ ret = select_wim_image(w, image);
if (ret != 0)
return ret;
struct extract_args args = {
- .w = w,
- .extract_flags = extract_flags,
- .output_dir = output_dir,
- #ifdef WITH_NTFS_3G
- .scapi = NULL
- #endif
+ .w = w,
+ .extract_flags = extract_flags,
+ .output_dir = output_dir,
+ .num_lutimes_warnings = 0,
};
ret = for_dentry_in_tree(wim_root_dentry(w), extract_dentry, &args);
int image;
const char *image_name;
- DEBUG("Attempting to extract all images from `%s'", w->filename);
+ DEBUG("Attempting to extract all images from `%s' to `%s'",
+ w->filename, output_dir);
- ret = extract_directory(output_dir);
+ ret = extract_directory(output_dir, true);
if (ret != 0)
return ret;
memcpy(buf, output_dir, 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) {
strcpy(buf + output_path_len + 1, image_name);
}
ret = extract_single_image(w, image, buf, 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 *output_dir, int flags,
+ WIMStruct **additional_swms,
+ unsigned num_additional_swms)
{
+ struct lookup_table *joined_tab, *w_tab_save;
+ int ret;
+
+ DEBUG("w->filename = %s, image = %d, output_dir = %s, flags = 0x%x, "
+ "num_additional_swms = %u",
+ w->filename, image, output_dir, flags, num_additional_swms);
- if (!output_dir)
+ if (!w || !output_dir)
return WIMLIB_ERR_INVALID_PARAM;
if ((flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
== (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
return WIMLIB_ERR_INVALID_PARAM;
- if ((flags & WIMLIB_EXTRACT_FLAG_NTFS)) {
- if (flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
- return WIMLIB_ERR_INVALID_PARAM;
- #ifdef WITH_NTFS_3G
- unsigned long mnt_flags;
- int ret = ntfs_check_if_mounted(output_dir, &mnt_flags);
- if (ret != 0) {
- ERROR_WITH_ERRNO("NTFS-3g: Cannot determine if a NTFS "
- "filesystem is mounted on `%s'",
- output_dir);
- return WIMLIB_ERR_NTFS_3G;
- }
- if (!(mnt_flags & NTFS_MF_MOUNTED)) {
- ERROR("NTFS-3g: No NTFS filesystem is mounted on `%s'",
- output_dir);
- return WIMLIB_ERR_NTFS_3G;
- }
- if (mnt_flags & NTFS_MF_READONLY) {
- ERROR("NTFS-3g: NTFS filesystem on `%s' is mounted "
- "read-only", output_dir);
- return WIMLIB_ERR_NTFS_3G;
- }
- #else
- ERROR("wimlib was compiled without support for NTFS-3g, so");
- ERROR("we cannot extract a WIM image while preserving NTFS-");
- ERROR("specific information");
- return WIMLIB_ERR_UNSUPPORTED;
- #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;
}
- for_lookup_table_entry(w->lookup_table, zero_out_refcnts, NULL);
+ for_lookup_table_entry(w->lookup_table, lte_free_extracted_file, NULL);
if (image == WIM_ALL_IMAGES) {
flags |= WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
- return extract_all_images(w, output_dir, flags);
+ ret = extract_all_images(w, output_dir, flags);
} else {
flags &= ~WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
- return extract_single_image(w, image, output_dir, flags);
+ ret = extract_single_image(w, image, output_dir, flags);
+ }
+ if (num_additional_swms) {
+ free_lookup_table(w->lookup_table);
+ w->lookup_table = w_tab_save;
}
+ return ret;
}
git://wimlib.net / wimlib / blobdiff