* extract.c
*
* Support for extracting WIM files.
- *
+ */
+
+/*
* Copyright (C) 2010 Carl Thijssen
* Copyright (C) 2012 Eric Biggers
*
- * wimlib - Library for working with WIM files
+ * This file is part of wimlib, a library for working with WIM files.
*
- * This library 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) any
- * later version.
+ * 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)
+ * any later version.
*
- * This library 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 details.
+ * 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
+ * details.
*
- * You should have received a copy of the GNU Lesser General Public License along
- * with this library; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with wimlib; if not, see http://www.gnu.org/licenses/.
*/
#include "wimlib_internal.h"
#include <string.h>
#include <errno.h>
+#ifdef WITH_NTFS_3G
+#include <ntfs-3g/volume.h>
+#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)
+{
+ char *p;
+ DEBUG("Setting output directory to `%s'", dir);
+
+ p = STRDUP(dir);
+ if (!p) {
+ ERROR("Out of memory");
+ return WIMLIB_ERR_NOMEM;
+ }
+
+ if (mkdir(dir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) != 0) {
+ if (errno == EEXIST) {
+ DEBUG("`%s' already exists", dir);
+ goto done;
+ }
+ 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.
const struct dentry *dentry,
const char *output_path)
{
- struct lookup_table *lookup_table;
- int link_type;
- bool is_multi_image_extraction;
struct lookup_table_entry *lte;
int ret;
int out_fd;
const struct resource_entry *res_entry;
- lookup_table = w->lookup_table;
- link_type = w->link_type;
- is_multi_image_extraction = w->is_multi_image_extraction;
- lte = lookup_resource(lookup_table, dentry->hash);
+ lte = lookup_resource(w->lookup_table, dentry->hash);
/* 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 (link_type != WIM_LINK_TYPE_NONE && lte && lte->out_refcnt != 0) {
+ if ((w->extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) &&
+ lte && lte->out_refcnt != 0)
+ {
wimlib_assert(lte->file_on_disk);
- if (link_type == WIM_LINK_TYPE_HARD) {
+ if (w->extract_flags & WIMLIB_EXTRACT_FLAG_HARDLINK) {
if (link(lte->file_on_disk, output_path) != 0) {
- ERROR("Failed to hard link `%s' to `%s': %m\n",
- output_path, lte->file_on_disk);
+ ERROR_WITH_ERRNO("Failed to hard link "
+ "`%s' to `%s'",
+ output_path, lte->file_on_disk);
return WIMLIB_ERR_LINK;
}
} else {
num_output_dir_path_components =
get_num_path_components(w->output_dir);
- if (is_multi_image_extraction) {
+ if (w->is_multi_image_extraction) {
num_path_components++;
num_output_dir_path_components--;
}
p2 = path_next_part(p2, NULL);
strcpy(p, p2);
if (symlink(buf, output_path) != 0) {
- ERROR("Failed to symlink `%s' to `%s': %m\n",
- buf, lte->file_on_disk);
+ ERROR_WITH_ERRNO("Failed to symlink `%s' to "
+ "`%s'",
+ buf, lte->file_on_disk);
return WIMLIB_ERR_LINK;
}
out_fd = open(output_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (out_fd == -1) {
- ERROR("Failed to open the file `%s' for writing: "
- "%m\n", output_path);
+ ERROR_WITH_ERRNO("Failed to open the file `%s' for writing",
+ output_path);
return WIMLIB_ERR_OPEN;
}
/* Extract empty file, with no lookup table entry... */
if (!lte) {
- DEBUG("Empty file `%s'\n", output_path);
+ DEBUG("Empty file `%s'.", output_path);
ret = 0;
goto done;
}
res_entry->original_size);
if (ret != 0) {
- ERROR("Failed to extract resource to `%s'!\n", output_path);
+ ERROR("Failed to extract resource to `%s'", output_path);
goto done;
}
itself. */
return 0;
default:
- ERROR("Cannot create directory `%s': %m\n",
- output_path);
+ ERROR_WITH_ERRNO("Cannot create directory `%s'",
+ output_path);
return WIMLIB_ERR_MKDIR;
}
}
size_t len = strlen(w->output_dir);
char output_path[len + dentry->full_path_utf8_len + 1];
- if (w->verbose)
+ if (w->extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
puts(dentry->full_path_utf8);
memcpy(output_path, w->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_regular_file(dentry)) {
return extract_regular_file(w, dentry, output_path);
} else {
static int extract_single_image(WIMStruct *w, int image)
{
- DEBUG("Extracting image %d\n", image);
+ DEBUG("Extracting image %d", image);
int ret;
ret = wimlib_select_image(w, image);
int image;
const char *image_name;
- DEBUG("Attempting to extract all images from `%s'\n", w->filename);
+ DEBUG("Attempting to extract all images from `%s'", w->filename);
memcpy(buf, w->output_dir, output_path_len);
buf[output_path_len] = '/';
for (image = 1; image <= w->hdr.image_count; image++) {
- buf[output_path_len + 1] = '\0';
image_name = wimlib_get_image_name(w, image);
if (*image_name) {
- strncat(buf + output_path_len + 1, image_name,
- image_name_max_len);
+ 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 = wimlib_set_output_dir(w, buf);
+ ret = set_output_dir(w, buf);
if (ret != 0)
goto done;
ret = extract_single_image(w, image);
if (ret != 0)
goto done;
}
- ret = 0;
done:
+ /* Restore original output directory */
buf[output_path_len + 1] = '\0';
- wimlib_set_output_dir(w, buf);
- return ret;
+ return 0;
}
/* Extracts a single image or all images from a WIM file. */
-WIMLIBAPI int wimlib_extract_image(WIMStruct *w, int image)
+WIMLIBAPI int wimlib_extract_image(WIMStruct *w, int image,
+ const char *output_dir, int flags)
{
- if (!w->output_dir) {
- ERROR("No output directory selected.\n");
- return WIMLIB_ERR_NOTDIR;
+ 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;
+
+ 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 (!(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
}
+ w->extract_flags = flags;
if (image == WIM_ALL_IMAGES) {
w->is_multi_image_extraction = true;
- return extract_all_images(w);
+ ret = extract_all_images(w);
} else {
w->is_multi_image_extraction = false;
- return extract_single_image(w, image);
- }
-
-}
-
-/* Set the output directory for WIM extraction. The directory is created using
- * mkdir(). Fails if directory cannot be created or already exists. */
-WIMLIBAPI int wimlib_set_output_dir(WIMStruct *w, const char *dir)
-{
- char *p;
- DEBUG("Setting output directory to `%s'\n", dir);
-
- if (!dir) {
- ERROR("Must specify a directory!\n");
- return WIMLIB_ERR_INVALID_PARAM;
- }
- p = STRDUP(dir);
- if (!p) {
- ERROR("Out of memory!\n");
- return WIMLIB_ERR_NOMEM;
- }
-
- if (mkdir(dir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) != 0) {
- if (errno == EEXIST) {
- DEBUG("`%s' already exists\n", dir);
- goto done;
- }
- ERROR("Cannot create directory `%s': %m\n", dir);
- FREE(p);
- return WIMLIB_ERR_MKDIR;
- } else {
- DEBUG("Created directory `%s'\n", dir);
+ ret = extract_single_image(w, image);
}
-done:
- FREE(w->output_dir);
- w->output_dir = p;
- return 0;
-}
+ return ret;
-WIMLIBAPI int wimlib_set_link_type(WIMStruct *w, int link_type)
-{
- switch (link_type) {
- case WIM_LINK_TYPE_NONE:
- case WIM_LINK_TYPE_HARD:
- case WIM_LINK_TYPE_SYMBOLIC:
- w->link_type = link_type;
- return 0;
- default:
- return WIMLIB_ERR_INVALID_PARAM;
- }
}
-
git://wimlib.net / wimlib / blobdiff