* 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.
*/
/*
* along with wimlib; if not, see http://www.gnu.org/licenses/.
*/
-#include "wimlib_internal.h"
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include "config.h"
#include "dentry.h"
#include "lookup_table.h"
#include "timestamp.h"
+#include "wimlib_internal.h"
#include "xml.h"
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <dirent.h>
-#include <string.h>
-#include <errno.h>
-
-#ifdef WITH_NTFS_3G
-#include <ntfs-3g/volume.h>
-#include <ntfs-3g/security.h>
-#endif
/* Internal */
#define WIMLIB_EXTRACT_FLAG_MULTI_IMAGE 0x80000000
* 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;
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;
}
int ret;
const struct list_head *head = &dentry->link_group_list;
- if (head->next != head) {
+ if (head->next != head &&
+ !(extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE))
+ {
/* 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
goto done;
}
-
- 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;
}
- 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:
if (close(out_fd) != 0) {
ERROR_WITH_ERRNO("Failed to close file `%s'", output_path);
if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
WIMLIB_EXTRACT_FLAG_HARDLINK)) && lte) {
- if (lte->out_refcnt++ != 0)
+ if (++lte->out_refcnt != 1)
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)
+ lte->extracted_file = STRDUP(output_path);
+ if (!lte->extracted_file)
return WIMLIB_ERR_NOMEM;
}
* @output_path: The path to which the directory is to be extracted to.
* @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)
{
- /* 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;
}
if (dentry_is_symlink(dentry))
ret = extract_symlink(dentry, output_path, w);
else if (dentry_is_directory(dentry))
- ret = extract_directory(output_path);
+ ret = extract_directory(output_path, dentry_is_root(dentry));
else
ret = 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];
+
+ 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]);
#endif
};
- return for_dentry_in_tree(wim_root_dentry(w), extract_dentry, &args);
+ ret = for_dentry_in_tree(wim_root_dentry(w), extract_dentry, &args);
+ if (ret != 0)
+ return ret;
+ return for_dentry_in_tree_depth(wim_root_dentry(w),
+ apply_dentry_timestamps, &args);
+
}
DEBUG("Attempting to extract all images from `%s'", w->filename);
- ret = extract_directory(output_dir);
+ ret = extract_directory(output_dir, true);
if (ret != 0)
return ret;
WIMLIBAPI int wimlib_extract_image(WIMStruct *w, int image,
const char *output_dir, int flags)
{
-
if (!output_dir)
return WIMLIB_ERR_INVALID_PARAM;
== (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
return WIMLIB_ERR_INVALID_PARAM;
- if ((flags & WIMLIB_EXTRACT_FLAG_NTFS)) {
- #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 `%s' "
- "is mounted", output_dir);
- return WIMLIB_ERR_NTFS_3G;
- }
- if (!(mnt_flags & NTFS_MF_MOUNTED)) {
- ERROR("NTFS-3g: Filesystem on `%s' is not mounted ",
- output_dir);
- return WIMLIB_ERR_NTFS_3G;
- }
- if (mnt_flags & NTFS_MF_READONLY) {
- ERROR("NTFS-3g: 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
- }
-
for_lookup_table_entry(w->lookup_table, zero_out_refcnts, NULL);
if (image == WIM_ALL_IMAGES) {
git://wimlib.net / wimlib / blobdiff