* 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
-/* Sets and creates the directory to which files are to be extracted when
- * extracting files from the WIM. */
-static int make_output_dir(const char *dir)
-{
- char *p;
- DEBUG("Setting output directory to `%s'", dir);
-
- if (mkdir(dir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) != 0) {
- if (errno == EEXIST) {
- DEBUG("`%s' already exists", dir);
- return 0;
- }
- ERROR_WITH_ERRNO("Cannot create directory `%s'", dir);
- return WIMLIB_ERR_MKDIR;
- } else {
- DEBUG("Created directory `%s'", dir);
- }
- return 0;
-}
-
static int extract_regular_file_linked(const struct dentry *dentry,
const char *output_dir,
const char *output_path,
int extract_flags,
- const struct lookup_table_entry *lte)
+ struct lookup_table_entry *lte)
{
/* 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) */
+
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 "
const char *p2;
size_t i;
+ wimlib_assert(extract_flags & WIMLIB_EXTRACT_FLAG_SYMLINK);
+
num_path_components =
get_num_path_components(dentry->full_path_utf8) - 1;
num_output_dir_path_components =
}
static int extract_regular_file_unlinked(WIMStruct *w,
- const struct dentry *dentry,
+ struct dentry *dentry,
const char *output_path,
int extract_flags,
struct lookup_table_entry *lte)
{
+ /* Normal mode of extraction. Regular files and hard links are
+ * extracted in the way that they appear in the WIM. */
+
int out_fd;
const struct resource_entry *res_entry;
int ret;
- /* Otherwise, we must actually extract the file contents. */
+ 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
+ * 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) {
+ DEBUG("Extracting hard link `%s' => `%s'",
+ output_path, other->extracted_file);
+ if (link(other->extracted_file, output_path) != 0) {
+ ERROR_WITH_ERRNO("Failed to hard link "
+ "`%s' to `%s'",
+ output_path,
+ other->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;
+ }
+ }
+
+ /* 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) {
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;
}
+
res_entry = <e->resource_entry;
ret = extract_resource_to_fd(w, res_entry, out_fd,
goto done;
}
- /* 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;
+ 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:
- close(out_fd);
+ 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.
*/
static int extract_regular_file(WIMStruct *w,
- const struct dentry *dentry,
+ struct dentry *dentry,
const char *output_dir,
const char *output_path,
int extract_flags)
{
struct lookup_table_entry *lte;
- lte = __lookup_resource(w->lookup_table, dentry_hash(dentry));
+ lte = dentry_first_lte(dentry, w->lookup_table);
+
+ if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
+ WIMLIB_EXTRACT_FLAG_HARDLINK)) && lte) {
+ if (lte->out_refcnt++ != 0)
+ 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;
+ }
- /* 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)
- return extract_regular_file_linked(dentry, output_dir,
- output_path, extract_flags,
- lte);
- else
- return extract_regular_file_unlinked(w, dentry, output_path,
- extract_flags, lte);
+ return extract_regular_file_unlinked(w, dentry, output_path,
+ extract_flags, lte);
}
* @output_path: The path to which the directory is to be extracted to.
* @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;
}
};
/*
- * 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)
{
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 = 0;
+ int ret;
- if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE) {
+ wimlib_assert(dentry->full_path_utf8);
puts(dentry->full_path_utf8);
+ }
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';
- if (dentry_is_symlink(dentry)) {
+ 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 {
+ else if (dentry_is_directory(dentry))
+ ret = extract_directory(output_path, dentry_is_root(dentry));
+ else
ret = extract_regular_file(w, dentry, args->output_dir,
- output_path, extract_flags);
+ output_path, extract_flags);
+ if (ret != 0)
+ return ret;
+
+ return 0;
+}
+
+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]);
+ if (lutimes(output_path, tv) != 0) {
+ WARNING("Failed to set timestamp on file `%s': %s",
+ output_path, strerror(errno));
}
- return ret;
+ return 0;
}
#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, 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 is empty. Use image number instead */
sprintf(buf + output_path_len + 1, "%d", image);
}
- ret = make_output_dir(buf);
- if (ret != 0)
- goto done;
ret = extract_single_image(w, image, buf, extract_flags);
if (ret != 0)
goto done;
WIMLIBAPI int wimlib_extract_image(WIMStruct *w, int image,
const char *output_dir, int flags)
{
- int ret;
if (!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 (image == WIM_ALL_IMAGES)
+ for_lookup_table_entry(w->lookup_table, zero_out_refcnts, NULL);
+
+ if (image == WIM_ALL_IMAGES) {
flags |= WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
- else
+ return extract_all_images(w, output_dir, flags);
+ } else {
flags &= ~WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
-
- ret = make_output_dir(output_dir);
+ return extract_single_image(w, image, output_dir, flags);
+ }
+
+}
+
+WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
+ const char *device, int flags)
+{
+#ifdef WITH_NTFS_3G
+ int ret;
+
+ if (!device)
+ return WIMLIB_ERR_INVALID_PARAM;
+ if (image == WIM_ALL_IMAGES) {
+ ERROR("Can only apply a single image when applying "
+ "directly to a NTFS volume");
+ return WIMLIB_ERR_INVALID_PARAM;
+ }
+ if (flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) {
+ ERROR("Cannot specifcy symlink or hardlink flags when applying ");
+ ERROR("directly to a NTFS volume");
+ return WIMLIB_ERR_INVALID_PARAM;
+ }
+ ret = wimlib_select_image(w, image);
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 (!(mnt_flags & NTFS_MF_MOUNTED)) {
- ERROR("NTFS-3g: Filesystem on `%s' is not mounted ",
- output_dir);
- }
- 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
- }
- if (image == WIM_ALL_IMAGES)
- ret = extract_all_images(w, output_dir, flags);
- else
- ret = extract_single_image(w, image, output_dir, flags);
- return ret;
+ if (getuid() != 0) {
+ ERROR("We are not root, but NTFS-3g requires root privileges to set arbitrary");
+ ERROR("security data on the NTFS filesystem. Please run this program as root");
+ ERROR("if you want to extract a WIM image while preserving NTFS-specific");
+ ERROR("information.");
+ return WIMLIB_ERR_NOT_ROOT;
+ }
+#else /* WITH_NTFS_3G */
+ ERROR("wimlib was compiled without support for NTFS-3g, so");
+ ERROR("we cannot apply a WIM image directly to a NTFS volume");
+ return WIMLIB_ERR_UNSUPPORTED;
+#endif /* !WITH_NTFS_3G */
}
git://wimlib.net / wimlib / blobdiff