* along with wimlib; if not, see http://www.gnu.org/licenses/.
*/
+/*
+ * This file provides the API functions wimlib_extract_image(),
+ * wimlib_extract_files(), and wimlib_extract_image_from_pipe(). Internally,
+ * all end up calling extract_tree() zero or more times to extract a tree of
+ * files from the currently selected WIM image to the specified target directory
+ * or NTFS volume.
+ *
+ * Although wimlib supports multiple extraction modes/backends (NTFS-3g, UNIX,
+ * Win32), this file does not itself have code to extract files or directories
+ * to any specific target; instead, it handles generic functionality and relies
+ * on lower-level callback functions declared in `struct apply_operations' to do
+ * the actual extraction.
+ */
+
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
-#ifdef __WIN32__
-# include "wimlib/win32_common.h" /* For GetFullPathName() */
-#endif
-
#include "wimlib/apply.h"
#include "wimlib/dentry.h"
#include "wimlib/encoding.h"
#include "wimlib/endianness.h"
#include "wimlib/error.h"
#include "wimlib/lookup_table.h"
+#include "wimlib/metadata.h"
#include "wimlib/paths.h"
+#include "wimlib/reparse.h"
#include "wimlib/resource.h"
+#include "wimlib/security.h"
#include "wimlib/swm.h"
#ifdef __WIN32__
# include "wimlib/win32.h" /* for realpath() equivalent */
#endif
#include "wimlib/xml.h"
+#include "wimlib/wim.h"
#include <errno.h>
-#include <limits.h>
-#ifdef WITH_NTFS_3G
-# include <ntfs-3g/volume.h> /* for ntfs_mount(), ntfs_umount() */
-#endif
+#include <fcntl.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
-#define MAX_EXTRACT_LONG_PATH_WARNINGS 5
+#define WIMLIB_EXTRACT_FLAG_MULTI_IMAGE 0x80000000
+#define WIMLIB_EXTRACT_FLAG_FROM_PIPE 0x40000000
+#define WIMLIB_EXTRACT_MASK_PUBLIC 0x3fffffff
+/* Given a WIM dentry in the tree to be extracted, resolve all streams in the
+ * corresponding inode and set 'out_refcnt' in each to 0. */
static int
-do_apply_op(struct wim_dentry *dentry, struct apply_args *args,
- int (*apply_dentry_func)(const tchar *, size_t,
- struct wim_dentry *, struct apply_args *))
+dentry_resolve_and_zero_lte_refcnt(struct wim_dentry *dentry, void *_ctx)
{
- tchar *p;
- size_t extraction_path_nchars;
- struct wim_dentry *d;
- LIST_HEAD(ancestor_list);
- const tchar *target;
- size_t target_nchars;
+ struct apply_ctx *ctx = _ctx;
+ struct wim_inode *inode = dentry->d_inode;
+ struct wim_lookup_table_entry *lte;
+ int ret;
+ bool force = false;
-#ifdef __WIN32__
- if (args->target_lowlevel_path) {
- target = args->target_lowlevel_path;
- target_nchars = args->target_lowlevel_path_nchars;
- } else
-#endif
+ if (dentry->extraction_skipped)
+ return 0;
+
+ /* Special case: when extracting from a pipe, the WIM lookup table is
+ * initially empty, so "resolving" an inode's streams is initially not
+ * possible. However, we still need to keep track of which streams,
+ * identified by SHA1 message digests, need to be extracted, so we
+ * "resolve" the inode's streams anyway by allocating new entries. */
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE)
+ force = true;
+ ret = inode_resolve_ltes(inode, ctx->wim->lookup_table, force);
+ if (ret)
+ return ret;
+ for (unsigned i = 0; i <= inode->i_num_ads; i++) {
+ lte = inode_stream_lte_resolved(inode, i);
+ if (lte)
+ lte->out_refcnt = 0;
+ }
+ return 0;
+}
+
+static inline bool
+is_linked_extraction(const struct apply_ctx *ctx)
+{
+ return 0 != (ctx->extract_flags & (WIMLIB_EXTRACT_FLAG_HARDLINK |
+ WIMLIB_EXTRACT_FLAG_SYMLINK));
+}
+
+static inline bool
+can_extract_named_data_streams(const struct apply_ctx *ctx)
+{
+ return ctx->supported_features.named_data_streams &&
+ !is_linked_extraction(ctx);
+}
+
+static int
+ref_stream_to_extract(struct wim_lookup_table_entry *lte,
+ struct wim_dentry *dentry, struct apply_ctx *ctx)
+{
+ if (!lte)
+ return 0;
+
+ if (likely(!is_linked_extraction(ctx)) || (lte->out_refcnt == 0 &&
+ lte->extracted_file == NULL))
{
- target = args->target;
- target_nchars = args->target_nchars;
+ ctx->progress.extract.total_bytes += wim_resource_size(lte);
+ ctx->progress.extract.num_streams++;
}
- extraction_path_nchars = target_nchars;
+ if (lte->out_refcnt == 0) {
+ list_add_tail(<e->extraction_list, &ctx->stream_list);
+ ctx->num_streams_remaining++;
+ }
- for (d = dentry; d != args->extract_root; d = d->parent) {
- if (d->not_extracted)
- return 0;
- extraction_path_nchars += d->extraction_name_nchars + 1;
- list_add(&d->tmp_list, &ancestor_list);
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_SEQUENTIAL) {
+ struct wim_dentry **lte_dentries;
+
+ /* Append dentry to this stream's array of dentries referencing
+ * it. Use inline array to avoid memory allocation until the
+ * number of dentries becomes too large. */
+ if (lte->out_refcnt < ARRAY_LEN(lte->inline_lte_dentries)) {
+ lte_dentries = lte->inline_lte_dentries;
+ } else {
+ struct wim_dentry **prev_lte_dentries;
+ size_t alloc_lte_dentries;
+
+ if (lte->out_refcnt == ARRAY_LEN(lte->inline_lte_dentries)) {
+ prev_lte_dentries = NULL;
+ alloc_lte_dentries = ARRAY_LEN(lte->inline_lte_dentries);
+ } else {
+ prev_lte_dentries = lte->lte_dentries;
+ alloc_lte_dentries = lte->alloc_lte_dentries;
+ }
+
+ if (lte->out_refcnt == alloc_lte_dentries) {
+ alloc_lte_dentries *= 2;
+ lte_dentries = REALLOC(prev_lte_dentries,
+ alloc_lte_dentries *
+ sizeof(lte_dentries[0]));
+ if (!lte_dentries)
+ return WIMLIB_ERR_NOMEM;
+ if (prev_lte_dentries == NULL) {
+ memcpy(lte_dentries,
+ lte->inline_lte_dentries,
+ sizeof(lte->inline_lte_dentries));
+ }
+ lte->lte_dentries = lte_dentries;
+ lte->alloc_lte_dentries = alloc_lte_dentries;
+ }
+ lte_dentries = lte->lte_dentries;
+ }
+ lte_dentries[lte->out_refcnt] = dentry;
}
+ lte->out_refcnt++;
+ return 0;
+}
+
+/* Given a WIM dentry in the tree to be extracted, iterate through streams that
+ * need to be extracted. For each one, add it to the list of streams to be
+ * extracted (ctx->stream_list) if not already done so, and also update the
+ * progress information (ctx->progress) with the stream. Furthermore, if doing
+ * a sequential extraction, build a mapping from each the stream to the dentries
+ * referencing it. */
+static int
+dentry_add_streams_to_extract(struct wim_dentry *dentry, void *_ctx)
+{
+ struct apply_ctx *ctx = _ctx;
+ struct wim_inode *inode = dentry->d_inode;
+ int ret;
- tchar extraction_path[extraction_path_nchars + 1];
- p = tmempcpy(extraction_path, target, target_nchars);
+ /* Don't process dentries marked as skipped. */
+ if (dentry->extraction_skipped)
+ return 0;
+ /* Don't process additional hard links. */
+ if (inode->i_visited && ctx->supported_features.hard_links)
+ return 0;
- list_for_each_entry(d, &ancestor_list, tmp_list) {
- *p++ = OS_PREFERRED_PATH_SEPARATOR;
- p = tmempcpy(p, d->extraction_name, d->extraction_name_nchars);
+ /* The unnamed data stream will always be extracted, except in an
+ * unlikely case. */
+ if (!inode_is_encrypted_directory(inode)) {
+ ret = ref_stream_to_extract(inode_unnamed_lte_resolved(inode),
+ dentry, ctx);
+ if (ret)
+ return ret;
}
- *p = T('\0');
-#ifdef __WIN32__
- /* Warn the user if the path exceeds MAX_PATH */
+ /* Named data streams will be extracted only if supported in the current
+ * extraction mode and volume, and to avoid complications, if not doing
+ * a linked extraction. */
+ if (can_extract_named_data_streams(ctx)) {
+ for (u16 i = 0; i < inode->i_num_ads; i++) {
+ if (!ads_entry_is_named_stream(&inode->i_ads_entries[i]))
+ continue;
+ ret = ref_stream_to_extract(inode->i_ads_entries[i].lte,
+ dentry, ctx);
+ if (ret)
+ return ret;
+ }
+ }
+ inode->i_visited = 1;
+ return 0;
+}
- /* + 1 for '\0', -4 for \\?\. */
- if (extraction_path_nchars + 1 - 4 > MAX_PATH) {
- if (dentry->needs_extraction &&
- args->num_long_paths < MAX_EXTRACT_LONG_PATH_WARNINGS)
+/* Inform library user of progress of stream extraction following the successful
+ * extraction of a copy of the stream specified by @lte. */
+static void
+update_extract_progress(struct apply_ctx *ctx,
+ const struct wim_lookup_table_entry *lte)
+{
+ wimlib_progress_func_t progress_func = ctx->progress_func;
+ union wimlib_progress_info *progress = &ctx->progress;
+
+ progress->extract.completed_bytes += wim_resource_size(lte);
+ if (progress_func &&
+ progress->extract.completed_bytes >= ctx->next_progress)
+ {
+ progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS, progress);
+ if (progress->extract.completed_bytes >=
+ progress->extract.total_bytes)
{
- WARNING("Path \"%ls\" exceeds MAX_PATH and will not be accessible "
- "to most Windows software", extraction_path);
- if (++args->num_long_paths == MAX_EXTRACT_LONG_PATH_WARNINGS)
- WARNING("Suppressing further warnings about long paths");
+ ctx->next_progress = ~0ULL;
+ } else {
+ ctx->next_progress += progress->extract.total_bytes / 128;
+ if (ctx->next_progress > progress->extract.total_bytes)
+ ctx->next_progress = progress->extract.total_bytes;
}
}
-#endif
- return (*apply_dentry_func)(extraction_path, extraction_path_nchars,
- dentry, args);
}
+#ifndef __WIN32__
+/* Extract a symbolic link (not directly as reparse data), handling fixing up
+ * the target of absolute symbolic links and updating the extract progress.
+ *
+ * @inode must specify the WIM inode for a symbolic link or junction reparse
+ * point.
+ *
+ * @lte_override overrides the resource used as the reparse data for the
+ * symbolic link. */
+static int
+extract_symlink(const tchar *path, struct apply_ctx *ctx,
+ struct wim_inode *inode,
+ struct wim_lookup_table_entry *lte_override)
+{
+ ssize_t bufsize = ctx->ops->path_max;
+ tchar target[bufsize];
+ tchar *buf = target;
+ tchar *fixed_target;
+ ssize_t sret;
+ int ret;
-/* Extracts a file, directory, or symbolic link from the WIM archive. */
+ /* If absolute symbolic link fixups requested, reserve space in the link
+ * target buffer for the absolute path of the target directory. */
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX)
+ {
+ buf += ctx->realtarget_nchars;
+ bufsize -= ctx->realtarget_nchars;
+ }
+
+ /* Translate the WIM inode's reparse data into the link target. */
+ sret = wim_inode_readlink(inode, buf, bufsize - 1, lte_override);
+ if (sret < 0) {
+ errno = -sret;
+ return WIMLIB_ERR_READLINK;
+ }
+ buf[sret] = '\0';
+
+ if ((ctx->extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX) &&
+ buf[0] == '/')
+ {
+ /* Fix absolute symbolic link target to point into the
+ * actual extraction destination. */
+ tmemcpy(target, ctx->realtarget, ctx->realtarget_nchars);
+ fixed_target = target;
+ } else {
+ /* Keep same link target. */
+ fixed_target = buf;
+ }
+
+ /* Call into the apply_operations to create the symbolic link. */
+ DEBUG("Creating symlink \"%"TS"\" => \"%"TS"\"",
+ path, fixed_target);
+ ret = ctx->ops->create_symlink(fixed_target, path, ctx);
+ if (ret) {
+ ERROR_WITH_ERRNO("Failed to create symlink "
+ "\"%"TS"\" => \"%"TS"\"", path, fixed_target);
+ return ret;
+ }
+
+ /* Account for reparse data consumed. */
+ update_extract_progress(ctx,
+ (lte_override ? lte_override :
+ inode_unnamed_lte_resolved(inode)));
+ return 0;
+}
+#endif /* !__WIN32__ */
+
+/* Create a file, directory, or symbolic link. */
static int
-apply_dentry_normal(struct wim_dentry *dentry, void *arg)
+extract_inode(const tchar *path, struct apply_ctx *ctx, struct wim_inode *inode)
{
-#ifdef __WIN32__
- return do_apply_op(dentry, arg, win32_do_apply_dentry);
-#else
- return do_apply_op(dentry, arg, unix_do_apply_dentry);
-#endif
+ int ret;
+
+#ifndef __WIN32__
+ if (ctx->supported_features.symlink_reparse_points &&
+ !ctx->supported_features.reparse_points &&
+ inode_is_symlink(inode))
+ {
+ ret = extract_symlink(path, ctx, inode, NULL);
+ } else
+#endif /* !__WIN32__ */
+ if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
+ ret = ctx->ops->create_directory(path, ctx);
+ if (ret) {
+ ERROR_WITH_ERRNO("Failed to create the directory "
+ "\"%"TS"\"", path);
+ }
+ } else {
+ ret = ctx->ops->create_file(path, ctx);
+ if (ret) {
+ ERROR_WITH_ERRNO("Failed to create the file "
+ "\"%"TS"\"", path);
+ }
+ }
+ return ret;
}
+static int
+extract_hardlink(const tchar *oldpath, const tchar *newpath,
+ struct apply_ctx *ctx)
+{
+ int ret;
+
+ DEBUG("Creating hardlink \"%"TS"\" => \"%"TS"\"", newpath, oldpath);
+ ret = ctx->ops->create_hardlink(oldpath, newpath, ctx);
+ if (ret) {
+ ERROR_WITH_ERRNO("Failed to create hardlink "
+ "\"%"TS"\" => \"%"TS"\"",
+ newpath, oldpath);
+ }
+ return ret;
+}
+
+#ifdef __WIN32__
+static int
+try_extract_rpfix(u8 *rpbuf,
+ u16 *rpbuflen_p,
+ const wchar_t *extract_root_realpath,
+ unsigned extract_root_realpath_nchars)
+{
+ struct reparse_data rpdata;
+ wchar_t *target;
+ size_t target_nchars;
+ size_t stripped_nchars;
+ wchar_t *stripped_target;
+ wchar_t stripped_target_nchars;
+ int ret;
+
+ utf16lechar *new_target;
+ utf16lechar *new_print_name;
+ size_t new_target_nchars;
+ size_t new_print_name_nchars;
+ utf16lechar *p;
+
+ ret = parse_reparse_data(rpbuf, *rpbuflen_p, &rpdata);
+ if (ret)
+ return ret;
+
+ if (extract_root_realpath[0] == L'\0' ||
+ extract_root_realpath[1] != L':' ||
+ extract_root_realpath[2] != L'\\')
+ return WIMLIB_ERR_REPARSE_POINT_FIXUP_FAILED;
+
+ ret = parse_substitute_name(rpdata.substitute_name,
+ rpdata.substitute_name_nbytes,
+ rpdata.rptag);
+ if (ret < 0)
+ return 0;
+ stripped_nchars = ret;
+ target = rpdata.substitute_name;
+ target_nchars = rpdata.substitute_name_nbytes / sizeof(utf16lechar);
+ stripped_target = target + stripped_nchars;
+ stripped_target_nchars = target_nchars - stripped_nchars;
+
+ new_target = alloca((6 + extract_root_realpath_nchars +
+ stripped_target_nchars) * sizeof(utf16lechar));
+
+ p = new_target;
+ if (stripped_nchars == 6) {
+ /* Include \??\ prefix if it was present before */
+ p = wmempcpy(p, L"\\??\\", 4);
+ }
+
+ /* Print name excludes the \??\ if present. */
+ new_print_name = p;
+ if (stripped_nchars != 0) {
+ /* Get drive letter from real path to extract root, if a drive
+ * letter was present before. */
+ *p++ = extract_root_realpath[0];
+ *p++ = extract_root_realpath[1];
+ }
+ /* Copy the rest of the extract root */
+ p = wmempcpy(p, extract_root_realpath + 2, extract_root_realpath_nchars - 2);
+
+ /* Append the stripped target */
+ p = wmempcpy(p, stripped_target, stripped_target_nchars);
+ new_target_nchars = p - new_target;
+ new_print_name_nchars = p - new_print_name;
+
+ if (new_target_nchars * sizeof(utf16lechar) >= REPARSE_POINT_MAX_SIZE ||
+ new_print_name_nchars * sizeof(utf16lechar) >= REPARSE_POINT_MAX_SIZE)
+ return WIMLIB_ERR_REPARSE_POINT_FIXUP_FAILED;
+
+ rpdata.substitute_name = new_target;
+ rpdata.substitute_name_nbytes = new_target_nchars * sizeof(utf16lechar);
+ rpdata.print_name = new_print_name;
+ rpdata.print_name_nbytes = new_print_name_nchars * sizeof(utf16lechar);
+ return make_reparse_buffer(&rpdata, rpbuf, rpbuflen_p);
+}
+#endif /* __WIN32__ */
-/* Apply timestamps to an extracted file or directory */
+/* Set reparse data on extracted file or directory that has
+ * FILE_ATTRIBUTE_REPARSE_POINT set. */
static int
-apply_dentry_timestamps_normal(struct wim_dentry *dentry, void *arg)
+extract_reparse_data(const tchar *path, struct apply_ctx *ctx,
+ struct wim_inode *inode,
+ struct wim_lookup_table_entry *lte_override)
{
+ int ret;
+ u8 rpbuf[REPARSE_POINT_MAX_SIZE];
+ u16 rpbuflen;
+
+ ret = wim_inode_get_reparse_data(inode, rpbuf, &rpbuflen, lte_override);
+ if (ret)
+ goto error;
+
#ifdef __WIN32__
- return do_apply_op(dentry, arg, win32_do_apply_dentry_timestamps);
-#else
- return do_apply_op(dentry, arg, unix_do_apply_dentry_timestamps);
+ /* Fix up target of absolute symbolic link or junction points so
+ * that they point into the actual extraction target. */
+ if ((ctx->extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX) &&
+ (inode->i_reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK ||
+ inode->i_reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT) &&
+ !inode->i_not_rpfixed)
+ {
+ ret = try_extract_rpfix(rpbuf, &rpbuflen, ctx->realtarget,
+ ctx->realtarget_nchars);
+ if (ret && !(ctx->extract_flags &
+ WIMLIB_EXTRACT_FLAG_STRICT_SYMLINKS))
+ {
+ WARNING("Reparse point fixup of \"%"TS"\" "
+ "failed", path);
+ ret = 0;
+ }
+ if (ret)
+ goto error;
+ }
#endif
+
+ ret = ctx->ops->set_reparse_data(path, rpbuf, rpbuflen, ctx);
+
+ /* On Windows, the SeCreateSymbolicLink privilege is required to create
+ * symbolic links. To be more friendly towards non-Administrator users,
+ * we merely warn the user if symbolic links cannot be created due to
+ * insufficient permissions or privileges, unless
+ * WIMLIB_EXTRACT_FLAG_STRICT_SYMLINKS was provided. */
+#ifdef __WIN32__
+ if (ret && inode_is_symlink(inode) &&
+ (errno == EACCES || errno == EPERM) &&
+ !(ctx->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_SYMLINKS))
+ {
+ WARNING("Can't set reparse data on \"%"TS"\": "
+ "Access denied!\n"
+ " You may be trying to "
+ "extract a symbolic link without the\n"
+ " SeCreateSymbolicLink privilege, "
+ "which by default non-Administrator\n"
+ " accounts do not have.",
+ path);
+ ret = 0;
+ }
+#endif
+ if (ret)
+ goto error;
+
+ /* Account for reparse data consumed. */
+ update_extract_progress(ctx,
+ (lte_override ? lte_override :
+ inode_unnamed_lte_resolved(inode)));
+ return 0;
+
+error:
+ ERROR_WITH_ERRNO("Failed to set reparse data on \"%"TS"\"", path);
+ return ret;
}
+/*
+ * Extract zero or more streams to a file.
+ *
+ * This function operates slightly differently depending on whether @lte_spec is
+ * NULL or not. When @lte_spec is NULL, the behavior is to extract the default
+ * file contents (unnamed stream), and, if named data streams are supported in
+ * the extract mode and volume, any named data streams. When @lte_spec is NULL,
+ * the behavior is to extract only all copies of the stream @lte_spec, and in
+ * addition use @lte_spec to set the reparse data or create the symbolic link if
+ * appropriate.
+ *
+ * @path
+ * Path to file to extract (as can be passed to apply_operations
+ * functions).
+ * @ctx
+ * Apply context.
+ * @dentry
+ * WIM dentry that corresponds to the file being extracted.
+ * @lte_spec
+ * If non-NULL, specifies the lookup table entry for a stream to extract,
+ * and only that stream will be extracted (although there may be more than
+ * one instance of it).
+ * @lte_override
+ * Used only if @lte_spec != NULL; it is passed to the extraction functions
+ * rather than @lte_spec, allowing the location of the stream to be
+ * overridden. (This is used when the WIM is being read from a nonseekable
+ * file, such as a pipe, when streams need to be used more than once; each
+ * such stream is extracted to a temporary file.)
+ */
+static int
+extract_streams(const tchar *path, struct apply_ctx *ctx,
+ struct wim_dentry *dentry,
+ struct wim_lookup_table_entry *lte_spec,
+ struct wim_lookup_table_entry *lte_override)
+{
+ struct wim_inode *inode = dentry->d_inode;
+ struct wim_lookup_table_entry *lte;
+ int ret;
+
+ if (dentry->was_hardlinked)
+ return 0;
+
+#ifdef ENABLE_DEBUG
+ if (lte_spec) {
+ char sha1_str[100];
+ char *p = sha1_str;
+ for (unsigned i = 0; i < SHA1_HASH_SIZE; i++)
+ p += sprintf(p, "%02x", lte_override->hash[i]);
+ DEBUG("Extracting stream SHA1=%s to \"%"TS"\"",
+ sha1_str, path, inode->i_ino);
+ } else {
+ DEBUG("Extracting streams to \"%"TS"\"", path, inode->i_ino);
+ }
+#endif
+
+ /* Unnamed data stream. */
+ lte = inode_unnamed_lte_resolved(inode);
+ if (lte && (!lte_spec || lte == lte_spec)) {
+ if (lte_spec)
+ lte = lte_override;
+ if (!(inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
+ FILE_ATTRIBUTE_REPARSE_POINT)))
+ {
+ if ((inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED) &&
+ ctx->supported_features.encrypted_files)
+ ret = ctx->ops->extract_encrypted_stream(path, lte, ctx);
+ else
+ ret = ctx->ops->extract_unnamed_stream(path, lte, ctx);
+ if (ret)
+ goto error;
+ update_extract_progress(ctx, lte);
+ }
+ else if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)
+ {
+ ret = 0;
+ if (ctx->supported_features.reparse_points)
+ ret = extract_reparse_data(path, ctx, inode, lte);
+ #ifndef __WIN32__
+ else if ((inode_is_symlink(inode) &&
+ ctx->supported_features.symlink_reparse_points))
+ ret = extract_symlink(path, ctx, inode, lte);
+ #endif
+ if (ret)
+ return ret;
+ }
+ }
+
+ /* Named data streams. */
+ if (can_extract_named_data_streams(ctx)) {
+ for (u16 i = 0; i < inode->i_num_ads; i++) {
+ struct wim_ads_entry *entry = &inode->i_ads_entries[i];
+
+ if (!ads_entry_is_named_stream(entry))
+ continue;
+ lte = entry->lte;
+ if (!lte)
+ continue;
+ if (lte_spec && lte_spec != lte)
+ continue;
+ if (lte_spec)
+ lte = lte_override;
+ ret = ctx->ops->extract_named_stream(path, entry->stream_name,
+ entry->stream_name_nbytes / 2,
+ lte, ctx);
+ if (ret)
+ goto error;
+ update_extract_progress(ctx, lte);
+ }
+ }
+ return 0;
+
+error:
+ ERROR_WITH_ERRNO("Failed to extract data of \"%"TS"\"", path);
+ return ret;
+}
+
+/* Set attributes on an extracted file or directory if supported by the
+ * extraction mode. */
+static int
+extract_file_attributes(const tchar *path, struct apply_ctx *ctx,
+ struct wim_dentry *dentry)
+{
+ int ret;
+
+ if (ctx->ops->set_file_attributes) {
+ if (dentry == ctx->extract_root && ctx->root_dentry_is_special)
+ return 0;
+ ret = ctx->ops->set_file_attributes(path,
+ dentry->d_inode->i_attributes,
+ ctx);
+ if (ret) {
+ ERROR_WITH_ERRNO("Failed to set attributes on "
+ "\"%"TS"\"", path);
+ return ret;
+ }
+ }
+ return 0;
+}
+
+
+/* Set or remove the short (DOS) name on an extracted file or directory if
+ * supported by the extraction mode. Since DOS names are unimportant and it's
+ * easy to run into problems setting them on Windows (SetFileShortName()
+ * requires SE_RESTORE privilege, which only the Administrator can request, and
+ * also requires DELETE access to the file), failure is ignored unless
+ * WIMLIB_EXTRACT_FLAG_STRICT_SHORT_NAMES is set. */
+static int
+extract_short_name(const tchar *path, struct apply_ctx *ctx,
+ struct wim_dentry *dentry)
+{
+ int ret;
+
+ /* The root of the dentry tree being extracted may not be extracted to
+ * its original name, so its short name should be ignored. */
+ if (dentry == ctx->extract_root)
+ return 0;
+
+ if (ctx->supported_features.short_names) {
+ ret = ctx->ops->set_short_name(path,
+ dentry->short_name,
+ dentry->short_name_nbytes / 2,
+ ctx);
+ if (ret && (ctx->extract_flags &
+ WIMLIB_EXTRACT_FLAG_STRICT_SHORT_NAMES))
+ {
+ ERROR_WITH_ERRNO("Failed to set short name of "
+ "\"%"TS"\"", path);
+ return ret;
+ }
+ }
+ return 0;
+}
+
+/* Set security descriptor, UNIX data, or neither on an extracted file, taking
+ * into account the current extraction mode and flags. */
+static int
+extract_security(const tchar *path, struct apply_ctx *ctx,
+ struct wim_dentry *dentry)
+{
+ int ret;
+ struct wim_inode *inode = dentry->d_inode;
+
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS)
+ return 0;
+
+ if ((ctx->extract_root == dentry) && ctx->root_dentry_is_special)
+ return 0;
+
+#ifndef __WIN32__
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
+ struct wimlib_unix_data data;
+
+ ret = inode_get_unix_data(inode, &data, NULL);
+ if (ret < 0)
+ ret = 0;
+ else if (ret == 0)
+ ret = ctx->ops->set_unix_data(path, &data, ctx);
+ if (ret) {
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS) {
+ ERROR_WITH_ERRNO("Failed to set UNIX owner, "
+ "group, and/or mode on "
+ "\"%"TS"\"", path);
+ return ret;
+ } else {
+ WARNING_WITH_ERRNO("Failed to set UNIX owner, "
+ "group, and/or/mode on "
+ "\"%"TS"\"", path);
+ }
+ }
+ }
+ else
+#endif /* __WIN32__ */
+ if (ctx->supported_features.security_descriptors &&
+ inode->i_security_id != -1)
+ {
+ const struct wim_security_data *sd;
+ const u8 *desc;
+ size_t desc_size;
+
+ sd = wim_const_security_data(ctx->wim);
+ desc = sd->descriptors[inode->i_security_id];
+ desc_size = sd->sizes[inode->i_security_id];
+
+ ret = ctx->ops->set_security_descriptor(path, desc,
+ desc_size, ctx,
+ !!(ctx->extract_flags &
+ WIMLIB_EXTRACT_FLAG_STRICT_ACLS));
+ if (ret) {
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS) {
+ ERROR_WITH_ERRNO("Failed to set security "
+ "descriptor on \"%"TS"\"", path);
+ return ret;
+ } else {
+ if (errno != EACCES) {
+ WARNING_WITH_ERRNO("Failed to set "
+ "security descriptor "
+ "on \"%"TS"\"", path);
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+/* Set timestamps on an extracted file. Failure is warning-only unless
+ * WIMLIB_EXTRACT_FLAG_STRICT_TIMESTAMPS is set. */
+static int
+extract_timestamps(const tchar *path, struct apply_ctx *ctx,
+ struct wim_dentry *dentry)
+{
+ struct wim_inode *inode = dentry->d_inode;
+ int ret;
+
+ if ((ctx->extract_root == dentry) && ctx->root_dentry_is_special)
+ return 0;
+
+ if (ctx->ops->set_timestamps) {
+ ret = ctx->ops->set_timestamps(path,
+ inode->i_creation_time,
+ inode->i_last_write_time,
+ inode->i_last_access_time,
+ ctx);
+ if (ret) {
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_TIMESTAMPS) {
+ ERROR_WITH_ERRNO("Failed to set timestamps "
+ "on \"%"TS"\"", path);
+ return ret;
+ } else {
+ WARNING_WITH_ERRNO("Failed to set timestamps "
+ "on \"%"TS"\"", path);
+ }
+ }
+ }
+ return 0;
+}
+
+/* Check whether the extraction of a dentry should be skipped completely. */
static bool
-dentry_is_dot_or_dotdot(const struct wim_dentry *dentry)
+dentry_is_supported(struct wim_dentry *dentry,
+ const struct wim_features *supported_features)
+{
+ struct wim_inode *inode = dentry->d_inode;
+
+ if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
+ if (supported_features->reparse_points)
+ return true;
+ if (supported_features->symlink_reparse_points &&
+ inode_is_symlink(inode))
+ return true;
+ return false;
+ }
+ return true;
+}
+
+/* Given a WIM dentry to extract, build the path to which to extract it, in the
+ * format understood by the callbacks in the apply_operations being used.
+ *
+ * Write the resulting path into @path, which must have room for at least
+ * ctx->ops->max_path characters including the null-terminator.
+ *
+ * Return %true if successful; %false if this WIM dentry doesn't actually need
+ * to be extracted or if the calculated path exceeds ctx->ops->max_path
+ * characters.
+ *
+ * This function clobbers the tmp_list member of @dentry and its ancestors up
+ * until the extraction root. */
+static bool
+build_extraction_path(tchar path[], struct wim_dentry *dentry,
+ struct apply_ctx *ctx)
+{
+ size_t path_nchars;
+ LIST_HEAD(ancestor_list);
+ tchar *p = path;
+ const tchar *target_prefix;
+ size_t target_prefix_nchars;
+ struct wim_dentry *d;
+
+ if (dentry->extraction_skipped)
+ return false;
+
+ path_nchars = ctx->ops->path_prefix_nchars;
+
+ if (ctx->ops->requires_realtarget_in_paths) {
+ target_prefix = ctx->realtarget;
+ target_prefix_nchars = ctx->realtarget_nchars;
+ } else if (ctx->ops->requires_target_in_paths) {
+ target_prefix = ctx->target;
+ target_prefix_nchars = ctx->target_nchars;
+ } else {
+ target_prefix = NULL;
+ target_prefix_nchars = 0;
+ }
+ path_nchars += target_prefix_nchars;
+
+ for (d = dentry; d != ctx->extract_root; d = d->parent) {
+ path_nchars += d->extraction_name_nchars + 1;
+ list_add(&d->tmp_list, &ancestor_list);
+ }
+
+ path_nchars++; /* null terminator */
+
+ if (path_nchars > ctx->ops->path_max) {
+ WARNING("\"%"TS"\": Path too long to extract",
+ dentry_full_path(dentry));
+ return false;
+ }
+
+ p = tmempcpy(p, ctx->ops->path_prefix, ctx->ops->path_prefix_nchars);
+ p = tmempcpy(p, target_prefix, target_prefix_nchars);
+ list_for_each_entry(d, &ancestor_list, tmp_list) {
+ *p++ = ctx->ops->path_separator;
+ p = tmempcpy(p, d->extraction_name, d->extraction_name_nchars);
+ }
+ *p++ = T('\0');
+ wimlib_assert(p - path == path_nchars);
+ return true;
+}
+
+static unsigned
+get_num_path_components(const tchar *path, tchar path_separator)
+{
+ unsigned num_components = 0;
+
+ while (*path) {
+ while (*path == path_separator)
+ path++;
+ if (*path)
+ num_components++;
+ while (*path && *path != path_separator)
+ path++;
+ }
+ return num_components;
+}
+
+static int
+extract_multiimage_symlink(const tchar *oldpath, const tchar *newpath,
+ struct apply_ctx *ctx, struct wim_dentry *dentry)
+{
+ size_t num_raw_path_components;
+ const struct wim_dentry *d;
+ size_t num_target_path_components;
+ tchar *p;
+ const tchar *p_old;
+ int ret;
+
+ num_raw_path_components = 0;
+ for (d = dentry; d != ctx->extract_root; d = d->parent)
+ num_raw_path_components++;
+
+ if (ctx->ops->requires_realtarget_in_paths)
+ num_target_path_components = get_num_path_components(ctx->realtarget,
+ ctx->ops->path_separator);
+ else if (ctx->ops->requires_target_in_paths)
+ num_target_path_components = get_num_path_components(ctx->target,
+ ctx->ops->path_separator);
+ else
+ num_target_path_components = 0;
+
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE) {
+ wimlib_assert(num_target_path_components > 0);
+ num_raw_path_components++;
+ num_target_path_components--;
+ }
+
+ p_old = oldpath;
+ while (*p_old == ctx->ops->path_separator)
+ p_old++;
+ while (--num_target_path_components) {
+ while (*p_old != ctx->ops->path_separator)
+ p_old++;
+ while (*p_old == ctx->ops->path_separator)
+ p_old++;
+ }
+
+ tchar symlink_target[tstrlen(p_old) + 3 * num_raw_path_components + 1];
+
+ p = &symlink_target[0];
+ while (num_raw_path_components--) {
+ *p++ = '.';
+ *p++ = '.';
+ *p++ = ctx->ops->path_separator;
+ }
+ tstrcpy(p, p_old);
+ DEBUG("Creating symlink \"%"TS"\" => \"%"TS"\"",
+ newpath, symlink_target);
+ ret = ctx->ops->create_symlink(symlink_target, newpath, ctx);
+ if (ret) {
+ ERROR_WITH_ERRNO("Failed to create symlink "
+ "\"%"TS"\" => \"%"TS"\"",
+ newpath, symlink_target);
+ }
+ return ret;
+}
+
+/* Create the "skeleton" of an extracted file or directory. Don't yet extract
+ * data streams, reparse data (including symbolic links), timestamps, and
+ * security descriptors. Basically, everything that doesn't require reading
+ * non-metadata resources from the WIM file and isn't delayed until the final
+ * pass. */
+static int
+do_dentry_extract_skeleton(tchar path[], struct wim_dentry *dentry,
+ struct apply_ctx *ctx)
+{
+ struct wim_inode *inode = dentry->d_inode;
+ int ret;
+ const tchar *oldpath;
+
+ if (unlikely(is_linked_extraction(ctx))) {
+ struct wim_lookup_table_entry *unnamed_lte;
+
+ unnamed_lte = inode_unnamed_lte_resolved(dentry->d_inode);
+ if (unnamed_lte && unnamed_lte->extracted_file) {
+ oldpath = unnamed_lte->extracted_file;
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_HARDLINK)
+ goto hardlink;
+ else
+ goto symlink;
+ }
+ }
+
+ /* Create hard link if this dentry corresponds to an already-extracted
+ * inode. */
+ if (inode->i_extracted_file) {
+ oldpath = inode->i_extracted_file;
+ goto hardlink;
+ }
+
+ /* Skip symlinks unless they can be extracted as reparse points rather
+ * than created directly. */
+ if (inode_is_symlink(inode) && !ctx->supported_features.reparse_points)
+ return 0;
+
+ /* Create this file or directory unless it's the extraction root, which
+ * was already created if necessary. */
+ if (dentry != ctx->extract_root) {
+ ret = extract_inode(path, ctx, inode);
+ if (ret)
+ return ret;
+ }
+
+ /* Create empty named data streams. */
+ if (can_extract_named_data_streams(ctx)) {
+ for (u16 i = 0; i < inode->i_num_ads; i++) {
+ struct wim_ads_entry *entry = &inode->i_ads_entries[i];
+
+ if (!ads_entry_is_named_stream(entry))
+ continue;
+ if (entry->lte)
+ continue;
+ ret = ctx->ops->extract_named_stream(path,
+ entry->stream_name,
+ entry->stream_name_nbytes / 2,
+ entry->lte, ctx);
+ if (ret) {
+ ERROR_WITH_ERRNO("\"%"TS"\": failed to create "
+ "empty named data stream",
+ path);
+ return ret;
+ }
+ }
+ }
+
+ /* Set file attributes (if supported). */
+ ret = extract_file_attributes(path, ctx, dentry);
+ if (ret)
+ return ret;
+
+ /* Set or remove file short name (if supported). */
+ ret = extract_short_name(path, ctx, dentry);
+ if (ret)
+ return ret;
+
+ /* If inode has multiple links and hard links are supported in this
+ * extraction mode and volume, save the path to the extracted file in
+ * case it's needed to create a hard link. */
+ if (unlikely(is_linked_extraction(ctx))) {
+ struct wim_lookup_table_entry *unnamed_lte;
+
+ unnamed_lte = inode_unnamed_lte_resolved(dentry->d_inode);
+ if (unnamed_lte) {
+ unnamed_lte->extracted_file = TSTRDUP(path);
+ if (!unnamed_lte->extracted_file)
+ return WIMLIB_ERR_NOMEM;
+ }
+ } else if (inode->i_nlink > 1 && ctx->supported_features.hard_links) {
+ inode->i_extracted_file = TSTRDUP(path);
+ if (!inode->i_extracted_file)
+ return WIMLIB_ERR_NOMEM;
+ }
+ return 0;
+
+symlink:
+ ret = extract_multiimage_symlink(oldpath, path, ctx, dentry);
+ if (ret)
+ return ret;
+ dentry->was_hardlinked = 1;
+ return 0;
+
+hardlink:
+ ret = extract_hardlink(oldpath, path, ctx);
+ if (ret)
+ return ret;
+ dentry->was_hardlinked = 1;
+ return 0;
+}
+
+static int
+dentry_extract_skeleton(struct wim_dentry *dentry, void *_ctx)
{
- const utf16lechar *file_name = dentry->file_name;
- return file_name != NULL &&
- file_name[0] == cpu_to_le16('.') &&
- (file_name[1] == cpu_to_le16('\0') ||
- (file_name[1] == cpu_to_le16('.') &&
- file_name[2] == cpu_to_le16('\0')));
+ struct apply_ctx *ctx = _ctx;
+ tchar path[ctx->ops->path_max];
+
+ if (!build_extraction_path(path, dentry, ctx))
+ return 0;
+ return do_dentry_extract_skeleton(path, dentry, ctx);
}
-/* Extract a dentry if it hasn't already been extracted and either
- * WIMLIB_EXTRACT_FLAG_NO_STREAMS is not specified, or the dentry is a directory
- * and/or has no unnamed stream. */
+/* Create a file or directory, then immediately extract all streams. This
+ * assumes that WIMLIB_EXTRACT_FLAG_SEQUENTIAL is not specified, since the WIM
+ * may not be read sequentially by this function. */
static int
-maybe_apply_dentry(struct wim_dentry *dentry, void *arg)
+dentry_extract(struct wim_dentry *dentry, void *_ctx)
{
- struct apply_args *args = arg;
+ struct apply_ctx *ctx = _ctx;
+ tchar path[ctx->ops->path_max];
int ret;
- if (!dentry->needs_extraction)
+ if (!build_extraction_path(path, dentry, ctx))
return 0;
- if (args->extract_flags & WIMLIB_EXTRACT_FLAG_NO_STREAMS &&
- !dentry_is_directory(dentry) &&
- inode_unnamed_lte_resolved(dentry->d_inode) != NULL)
- return 0;
+ ret = do_dentry_extract_skeleton(path, dentry, ctx);
+ if (ret)
+ return ret;
- if ((args->extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE) &&
- args->progress_func) {
- ret = calculate_dentry_full_path(dentry);
- if (ret)
- return ret;
- args->progress.extract.cur_path = dentry->_full_path;
- args->progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DENTRY,
- &args->progress);
- }
- ret = args->apply_dentry(dentry, args);
- if (ret == 0)
- dentry->needs_extraction = 0;
- return ret;
+ return extract_streams(path, ctx, dentry, NULL, NULL);
}
-static void
-calculate_bytes_to_extract(struct list_head *stream_list,
- int extract_flags,
- union wimlib_progress_info *progress)
+/* Extract all instances of the stream @lte that are being extracted in this
+ * call of extract_tree(). @can_seek specifies whether the WIM file descriptor
+ * is seekable or not (e.g. is a pipe). If not and the stream needs to be
+ * extracted multiple times, it is extracted to a temporary file first.
+ *
+ * This is intended for use with sequential extraction of a WIM image
+ * (WIMLIB_EXTRACT_FLAG_SEQUENTIAL specified). */
+static int
+extract_stream_instances(struct wim_lookup_table_entry *lte,
+ struct apply_ctx *ctx, bool can_seek)
{
- struct wim_lookup_table_entry *lte;
- u64 total_bytes = 0;
- u64 num_streams = 0;
+ struct wim_dentry **lte_dentries;
+ struct wim_lookup_table_entry *lte_tmp = NULL;
+ struct wim_lookup_table_entry *lte_override;
+ tchar *stream_tmp_filename = NULL;
+ tchar path[ctx->ops->path_max];
+ unsigned i;
+ int ret;
- /* For each stream to be extracted... */
- list_for_each_entry(lte, stream_list, extraction_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 {
- num_streams += lte->out_refcnt;
- total_bytes += lte->out_refcnt * wim_resource_size(lte);
+ if (lte->out_refcnt <= ARRAY_LEN(lte->inline_lte_dentries))
+ lte_dentries = lte->inline_lte_dentries;
+ else
+ lte_dentries = lte->lte_dentries;
+
+ if (likely(can_seek || lte->out_refcnt < 2)) {
+ lte_override = lte;
+ } else {
+ /* Need to extract stream to temporary file. */
+ struct filedes fd;
+ int raw_fd;
+
+ stream_tmp_filename = ttempnam(NULL, T("wimlib"));
+ if (!stream_tmp_filename) {
+ ERROR_WITH_ERRNO("Failed to create temporary filename");
+ ret = WIMLIB_ERR_OPEN;
+ goto out;
+ }
+
+ lte_tmp = memdup(lte, sizeof(struct wim_lookup_table_entry));
+ if (!lte_tmp) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_free_stream_tmp_filename;
}
+ lte_tmp->resource_location = RESOURCE_IN_FILE_ON_DISK;
+ lte_tmp->file_on_disk = stream_tmp_filename;
+ lte_override = lte_tmp;
+
+ raw_fd = topen(stream_tmp_filename,
+ O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0600);
+ if (raw_fd < 0) {
+ ERROR_WITH_ERRNO("Failed to open temporary file");
+ ret = WIMLIB_ERR_OPEN;
+ goto out_free_lte_tmp;
+ }
+ filedes_init(&fd, raw_fd);
+ ret = extract_wim_resource_to_fd(lte, &fd,
+ wim_resource_size(lte));
+ if (filedes_close(&fd) && !ret)
+ ret = WIMLIB_ERR_WRITE;
+ if (ret)
+ goto out_unlink_stream_tmp_file;
}
- 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 wim_lookup_table_entry *lte,
- struct list_head *stream_list)
-{
- if (++lte->out_refcnt == 1) {
- INIT_LIST_HEAD(<e->lte_dentry_list);
- list_add_tail(<e->extraction_list, stream_list);
+ /* Extract all instances of the stream, reading either from the stream
+ * in the WIM file or from the temporary file containing the stream.
+ * dentry->tmp_flag is used to ensure that each dentry is processed only
+ * once regardless of how many times this stream appears in the streams
+ * of the corresponding inode. */
+ for (i = 0; i < lte->out_refcnt; i++) {
+ struct wim_dentry *dentry = lte_dentries[i];
+
+ if (dentry->tmp_flag)
+ continue;
+ if (!build_extraction_path(path, dentry, ctx))
+ continue;
+ ret = extract_streams(path, ctx, dentry,
+ lte, lte_override);
+ if (ret)
+ goto out_clear_tmp_flags;
+ dentry->tmp_flag = 1;
}
+ ret = 0;
+out_clear_tmp_flags:
+ for (i = 0; i < lte->out_refcnt; i++)
+ lte_dentries[i]->tmp_flag = 0;
+out_unlink_stream_tmp_file:
+ if (stream_tmp_filename)
+ tunlink(stream_tmp_filename);
+out_free_lte_tmp:
+ FREE(lte_tmp);
+out_free_stream_tmp_filename:
+ FREE(stream_tmp_filename);
+out:
+ return ret;
}
-struct find_streams_ctx {
- struct list_head stream_list;
- int extract_flags;
-};
-
+/* Extracts a list of streams (ctx.stream_list), assuming that the directory
+ * structure and empty files were already created. This relies on the
+ * per-`struct wim_lookup_table_entry' list of dentries that reference each
+ * stream that was constructed earlier. Streams are extracted exactly in the
+ * order of the stream list; however, unless the WIM's file descriptor is
+ * detected to be non-seekable, streams may be read from the WIM file more than
+ * one time if multiple copies need to be extracted. */
static int
-dentry_find_streams_to_extract(struct wim_dentry *dentry, void *_ctx)
+extract_stream_list(struct apply_ctx *ctx)
{
- struct find_streams_ctx *ctx = _ctx;
- struct wim_inode *inode = dentry->d_inode;
struct wim_lookup_table_entry *lte;
- bool dentry_added = false;
- struct list_head *stream_list = &ctx->stream_list;
- int extract_flags = ctx->extract_flags;
-
- if (!dentry->needs_extraction)
- return 0;
+ bool can_seek;
+ int ret;
- lte = inode_unnamed_lte_resolved(inode);
- if (lte) {
- if (!inode->i_visited)
- maybe_add_stream_for_extraction(lte, stream_list);
- list_add_tail(&dentry->extraction_stream_list, <e->lte_dentry_list);
- dentry_added = true;
- }
-
- /* Determine whether to include alternate data stream entries or not.
- *
- * UNIX: Include them if extracting using NTFS-3g.
- *
- * Windows: Include them undconditionally, although if the filesystem is
- * not NTFS we won't actually be able to extract them. */
-#if defined(WITH_NTFS_3G)
- if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS)
-#elif defined(__WIN32__)
- if (1)
-#else
- if (0)
-#endif
- {
- for (unsigned i = 0; i < inode->i_num_ads; i++) {
- if (inode->i_ads_entries[i].stream_name_nbytes != 0) {
- lte = inode->i_ads_entries[i].lte;
- if (lte) {
- if (!inode->i_visited) {
- maybe_add_stream_for_extraction(lte,
- stream_list);
- }
- if (!dentry_added) {
- list_add_tail(&dentry->extraction_stream_list,
- <e->lte_dentry_list);
- dentry_added = true;
- }
- }
- }
- }
+ can_seek = (lseek(ctx->wim->in_fd.fd, 0, SEEK_CUR) != -1);
+ list_for_each_entry(lte, &ctx->stream_list, extraction_list) {
+ ret = extract_stream_instances(lte, ctx, can_seek);
+ if (ret)
+ return ret;
}
- inode->i_visited = 1;
return 0;
}
+/* Read the header from a stream in a pipable WIM. */
static int
-dentry_resolve_and_zero_lte_refcnt(struct wim_dentry *dentry, void *_lookup_table)
+read_pwm_stream_header(WIMStruct *pwm, struct wim_lookup_table_entry *lte,
+ bool allow_header)
{
- struct wim_inode *inode = dentry->d_inode;
- struct wim_lookup_table *lookup_table = _lookup_table;
- struct wim_lookup_table_entry *lte;
+ struct pwm_stream_hdr stream_hdr;
int ret;
- ret = inode_resolve_ltes(inode, lookup_table);
+ ret = full_read(&pwm->in_fd, &stream_hdr, sizeof(stream_hdr));
if (ret)
- return ret;
- for (unsigned i = 0; i <= inode->i_num_ads; i++) {
- lte = inode_stream_lte_resolved(inode, i);
- if (lte)
- lte->out_refcnt = 0;
+ goto read_error;
+
+ if (allow_header && stream_hdr.magic == PWM_MAGIC) {
+ u8 buf[WIM_HEADER_DISK_SIZE - sizeof(stream_hdr)];
+ ret = full_read(&pwm->in_fd, buf, sizeof(buf));
+ if (ret)
+ goto read_error;
+ lte->resource_location = RESOURCE_NONEXISTENT;
+ return 0;
+ }
+
+ if (stream_hdr.magic != PWM_STREAM_MAGIC) {
+ ERROR("Data read on pipe is invalid (expected stream header).");
+ return WIMLIB_ERR_INVALID_PIPABLE_WIM;
+ }
+
+ lte->resource_entry.original_size = le64_to_cpu(stream_hdr.uncompressed_size);
+ copy_hash(lte->hash, stream_hdr.hash);
+ lte->resource_entry.flags = le32_to_cpu(stream_hdr.flags);
+ lte->resource_entry.offset = pwm->in_fd.offset;
+ lte->resource_location = RESOURCE_IN_WIM;
+ lte->wim = pwm;
+ if (lte->resource_entry.flags & WIM_RESHDR_FLAG_COMPRESSED) {
+ lte->compression_type = pwm->compression_type;
+ lte->resource_entry.size = 0;
+ } else {
+ lte->compression_type = WIMLIB_COMPRESSION_TYPE_NONE;
+ lte->resource_entry.size = lte->resource_entry.original_size;
}
+ lte->is_pipable = 1;
return 0;
+
+read_error:
+ ERROR_WITH_ERRNO("Error reading pipable WIM from pipe");
+ return ret;
}
+/* Skip over an unneeded stream in a pipable WIM being read from a pipe. */
static int
-find_streams_for_extraction(struct wim_dentry *root,
- struct list_head *stream_list,
- struct wim_lookup_table *lookup_table,
- int extract_flags)
+skip_pwm_stream(struct wim_lookup_table_entry *lte)
{
- struct find_streams_ctx ctx;
- int ret;
-
- INIT_LIST_HEAD(&ctx.stream_list);
- ctx.extract_flags = extract_flags;
- ret = for_dentry_in_tree(root, dentry_resolve_and_zero_lte_refcnt, lookup_table);
- if (ret)
- return ret;
- for_dentry_in_tree(root, dentry_find_streams_to_extract, &ctx);
- list_transfer(&ctx.stream_list, stream_list);
- return 0;
+ return read_partial_wim_resource(lte, wim_resource_size(lte),
+ NULL, NULL,
+ WIMLIB_READ_RESOURCE_FLAG_SEEK_ONLY,
+ 0);
}
-struct apply_operations {
- int (*apply_dentry)(struct wim_dentry *dentry, void *arg);
- int (*apply_dentry_timestamps)(struct wim_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 = apply_dentry_ntfs,
- .apply_dentry_timestamps = apply_dentry_timestamps_ntfs,
-};
-#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)
+extract_streams_from_pipe(struct apply_ctx *ctx)
{
- uint64_t bytes_per_progress = args->progress.extract.total_bytes / 100;
- uint64_t next_progress = bytes_per_progress;
- struct wim_lookup_table_entry *lte;
- struct wim_dentry *dentry;
+ struct wim_lookup_table_entry *found_lte;
+ struct wim_lookup_table_entry *needed_lte;
+ struct wim_lookup_table *lookup_table;
int ret;
- /* This complicated loop is essentially looping through the dentries,
- * although dentries may be visited more than once (if a dentry contains
- * two different nonempty streams) or not at all (if a dentry contains
- * no non-empty streams).
- *
- * The outer loop is over the distinct streams to be extracted so that
- * sequential reading of the WIM can be implemented. */
-
- /* For each distinct stream to be extracted */
- list_for_each_entry(lte, stream_list, extraction_list) {
- /* For each dentry to be extracted that is a name for an inode
- * containing the stream */
- list_for_each_entry(dentry, <e->lte_dentry_list, extraction_stream_list) {
- /* Extract the dentry if it was not already
- * extracted */
- ret = maybe_apply_dentry(dentry, args);
+ ret = WIMLIB_ERR_NOMEM;
+ found_lte = new_lookup_table_entry();
+ if (!found_lte)
+ goto out;
+
+ lookup_table = ctx->wim->lookup_table;
+
+ while (ctx->num_streams_remaining) {
+ ret = read_pwm_stream_header(ctx->wim, found_lte, true);
+ if (ret)
+ goto out_free_found_lte;
+
+ if ((found_lte->resource_location != RESOURCE_NONEXISTENT)
+ && !(found_lte->resource_entry.flags & WIM_RESHDR_FLAG_METADATA)
+ && (needed_lte = __lookup_resource(lookup_table, found_lte->hash))
+ && (needed_lte->out_refcnt))
+ {
+ copy_resource_entry(&needed_lte->resource_entry,
+ &found_lte->resource_entry);
+ needed_lte->resource_location = found_lte->resource_location;
+ needed_lte->wim = found_lte->wim;
+ needed_lte->compression_type = found_lte->compression_type;
+ needed_lte->is_pipable = found_lte->is_pipable;
+
+ ret = extract_stream_instances(needed_lte, ctx, false);
if (ret)
- return ret;
- if (progress_func &&
- args->progress.extract.completed_bytes >= next_progress)
- {
- progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS,
- &args->progress);
- if (args->progress.extract.completed_bytes >=
- args->progress.extract.total_bytes)
- {
- next_progress = ~0ULL;
- } else {
- next_progress =
- min (args->progress.extract.completed_bytes +
- bytes_per_progress,
- args->progress.extract.total_bytes);
- }
- }
+ goto out_free_found_lte;
+ ctx->num_streams_remaining--;
+ } else if (found_lte->resource_location != RESOURCE_NONEXISTENT) {
+ ret = skip_pwm_stream(found_lte);
+ if (ret)
+ goto out_free_found_lte;
}
}
- return 0;
+ ret = 0;
+out_free_found_lte:
+ free_lookup_table_entry(found_lte);
+out:
+ return ret;
}
+/* Finish extracting a file, directory, or symbolic link by setting file
+ * security and timestamps. */
static int
-sort_stream_list_by_wim_position(struct list_head *stream_list)
+dentry_extract_final(struct wim_dentry *dentry, void *_ctx)
{
- struct list_head *cur;
- size_t num_streams;
- struct wim_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 wim_lookup_table_entry, extraction_list);
- cur = cur->next;
- }
+ struct apply_ctx *ctx = _ctx;
+ int ret;
+ tchar path[ctx->ops->path_max];
- qsort(array, num_streams, sizeof(array[0]), cmp_streams_by_wim_position);
+ if (!build_extraction_path(path, dentry, ctx))
+ return 0;
- INIT_LIST_HEAD(stream_list);
- for (i = 0; i < num_streams; i++)
- list_add_tail(&array[i]->extraction_list, stream_list);
- FREE(array);
- return 0;
+ ret = extract_security(path, ctx, dentry);
+ if (ret)
+ return ret;
+
+ return extract_timestamps(path, ctx, dentry);
}
/*
- * Extract a dentry to standard output.
+ * Extract a WIM dentry to standard output.
*
* This obviously doesn't make sense in all cases. We return an error if the
* dentry does not correspond to a regular file. Otherwise we extract the
extract_dentry_to_stdout(struct wim_dentry *dentry)
{
int ret = 0;
- if (!dentry_is_regular_file(dentry)) {
+ if (dentry->d_inode->i_attributes & (FILE_ATTRIBUTE_REPARSE_POINT |
+ FILE_ATTRIBUTE_DIRECTORY))
+ {
ERROR("\"%"TS"\" is not a regular file and therefore cannot be "
- "extracted to standard output", dentry->_full_path);
+ "extracted to standard output", dentry_full_path(dentry));
ret = WIMLIB_ERR_NOT_A_REGULAR_FILE;
} else {
struct wim_lookup_table_entry *lte;
lte = inode_unnamed_lte_resolved(dentry->d_inode);
if (lte) {
- ret = extract_wim_resource_to_fd(lte, STDOUT_FILENO,
+ struct filedes _stdout;
+ filedes_init(&_stdout, STDOUT_FILENO);
+ ret = extract_wim_resource_to_fd(lte, &_stdout,
wim_resource_size(lte));
}
}
return true;
}
+static bool
+dentry_is_dot_or_dotdot(const struct wim_dentry *dentry)
+{
+ const utf16lechar *file_name = dentry->file_name;
+ return file_name != NULL &&
+ file_name[0] == cpu_to_le16('.') &&
+ (file_name[1] == cpu_to_le16('\0') ||
+ (file_name[1] == cpu_to_le16('.') &&
+ file_name[2] == cpu_to_le16('\0')));
+}
+
+static int
+dentry_mark_skipped(struct wim_dentry *dentry, void *_ignore)
+{
+ dentry->extraction_skipped = 1;
+ return 0;
+}
+
/*
* dentry_calculate_extraction_path-
*
* UNIX, converted into the platform's multibyte encoding). However, if the
* file name contains characters that are not valid on the current platform or
* has some other format that is not valid, leave dentry->extraction_name as
- * NULL and clear dentry->needs_extraction to indicate that this dentry should
+ * NULL and set dentry->extraction_skipped to indicate that this dentry should
* not be extracted, unless the appropriate flag
* WIMLIB_EXTRACT_FLAG_REPLACE_INVALID_FILENAMES is set in the extract flags, in
* which case a substitute filename will be created and set instead.
static int
dentry_calculate_extraction_path(struct wim_dentry *dentry, void *_args)
{
- struct apply_args *args = _args;
+ struct apply_ctx *ctx = _args;
int ret;
- dentry->needs_extraction = 1;
-
- if (dentry == args->extract_root)
+ if (dentry == ctx->extract_root || dentry->extraction_skipped)
return 0;
+ if (!dentry_is_supported(dentry, &ctx->supported_features))
+ goto skip_dentry;
+
if (dentry_is_dot_or_dotdot(dentry)) {
/* WIM files shouldn't contain . or .. entries. But if they are
* there, don't attempt to extract them. */
- WARNING("Skipping extraction of unexpected . or .. file \"%"TS"\"",
- dentry_full_path(dentry));
+ WARNING("Skipping extraction of unexpected . or .. file "
+ "\"%"TS"\"", dentry_full_path(dentry));
goto skip_dentry;
}
#ifdef __WIN32__
- struct wim_dentry *other;
- list_for_each_entry(other, &dentry->case_insensitive_conflict_list,
- case_insensitive_conflict_list)
+ if (!ctx->ops->supports_case_sensitive_filenames)
{
- if (other->needs_extraction) {
- if (args->extract_flags & WIMLIB_EXTRACT_FLAG_ALL_CASE_CONFLICTS)
- {
- WARNING("\"%"TS"\" has the same case-insensitive "
- "name as \"%"TS"\"; extracting dummy name instead",
+ struct wim_dentry *other;
+ list_for_each_entry(other, &dentry->case_insensitive_conflict_list,
+ case_insensitive_conflict_list)
+ {
+ if (ctx->extract_flags &
+ WIMLIB_EXTRACT_FLAG_ALL_CASE_CONFLICTS) {
+ WARNING("\"%"TS"\" has the same "
+ "case-insensitive name as "
+ "\"%"TS"\"; extracting "
+ "dummy name instead",
dentry_full_path(dentry),
dentry_full_path(other));
goto out_replace;
} else {
- WARNING("Not extracting \"%"TS"\": has same case-insensitive "
+ WARNING("Not extracting \"%"TS"\": "
+ "has same case-insensitive "
"name as \"%"TS"\"",
dentry_full_path(dentry),
dentry_full_path(other));
}
}
}
-#endif
+#else /* __WIN32__ */
+ wimlib_assert(ctx->ops->supports_case_sensitive_filenames);
+#endif /* !__WIN32__ */
if (file_name_valid(dentry->file_name, dentry->file_name_nbytes / 2, false)) {
#ifdef __WIN32__
&dentry->extraction_name_nchars);
#endif
} else {
- if (args->extract_flags & WIMLIB_EXTRACT_FLAG_REPLACE_INVALID_FILENAMES)
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_REPLACE_INVALID_FILENAMES)
{
WARNING("\"%"TS"\" has an invalid filename "
"that is not supported on this platform; "
}
}
-out_replace:
+out_replace:
+ {
+ utf16lechar utf16_name_copy[dentry->file_name_nbytes / 2];
+
+ memcpy(utf16_name_copy, dentry->file_name, dentry->file_name_nbytes);
+ file_name_valid(utf16_name_copy, dentry->file_name_nbytes / 2, true);
+
+ tchar *tchar_name;
+ size_t tchar_nchars;
+ #ifdef __WIN32__
+ tchar_name = utf16_name_copy;
+ tchar_nchars = dentry->file_name_nbytes / 2;
+ #else
+ ret = utf16le_to_tstr(utf16_name_copy,
+ dentry->file_name_nbytes,
+ &tchar_name, &tchar_nchars);
+ if (ret)
+ return ret;
+ #endif
+ size_t fixed_name_num_chars = tchar_nchars;
+ tchar fixed_name[tchar_nchars + 50];
+
+ tmemcpy(fixed_name, tchar_name, tchar_nchars);
+ fixed_name_num_chars += tsprintf(fixed_name + tchar_nchars,
+ T(" (invalid filename #%lu)"),
+ ++ctx->invalid_sequence);
+ #ifndef __WIN32__
+ FREE(tchar_name);
+ #endif
+ dentry->extraction_name = memdup(fixed_name,
+ 2 * fixed_name_num_chars + 2);
+ if (!dentry->extraction_name)
+ return WIMLIB_ERR_NOMEM;
+ dentry->extraction_name_nchars = fixed_name_num_chars;
+ }
+ return 0;
+
+skip_dentry:
+ for_dentry_in_tree(dentry, dentry_mark_skipped, NULL);
+ return 0;
+}
+
+/* Clean up dentry and inode structure after extraction. */
+static int
+dentry_reset_needs_extraction(struct wim_dentry *dentry, void *_ignore)
+{
+ struct wim_inode *inode = dentry->d_inode;
+
+ dentry->extraction_skipped = 0;
+ dentry->was_hardlinked = 0;
+ inode->i_visited = 0;
+ FREE(inode->i_extracted_file);
+ inode->i_extracted_file = NULL;
+ if ((void*)dentry->extraction_name != (void*)dentry->file_name)
+ FREE(dentry->extraction_name);
+ dentry->extraction_name = NULL;
+ return 0;
+}
+
+/* Tally features necessary to extract a dentry and the corresponding inode. */
+static int
+dentry_tally_features(struct wim_dentry *dentry, void *_features)
+{
+ struct wim_features *features = _features;
+ struct wim_inode *inode = dentry->d_inode;
+
+ if (inode->i_attributes & FILE_ATTRIBUTE_ARCHIVE)
+ features->archive_files++;
+ if (inode->i_attributes & FILE_ATTRIBUTE_HIDDEN)
+ features->hidden_files++;
+ if (inode->i_attributes & FILE_ATTRIBUTE_SYSTEM)
+ features->system_files++;
+ if (inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED)
+ features->compressed_files++;
+ if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED)
+ features->encrypted_files++;
+ if (inode->i_attributes & FILE_ATTRIBUTE_NOT_CONTENT_INDEXED)
+ features->not_context_indexed_files++;
+ if (inode->i_attributes & FILE_ATTRIBUTE_SPARSE_FILE)
+ features->sparse_files++;
+ if (inode_has_named_stream(inode))
+ features->named_data_streams++;
+ if (inode->i_visited)
+ features->hard_links++;
+ if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
+ features->reparse_points++;
+ if (inode_is_symlink(inode))
+ features->symlink_reparse_points++;
+ else
+ features->other_reparse_points++;
+ }
+ if (inode->i_security_id != -1)
+ features->security_descriptors++;
+ if (dentry->short_name_nbytes)
+ features->short_names++;
+ if (inode_has_unix_data(inode))
+ features->unix_data++;
+ inode->i_visited = 1;
+ return 0;
+}
+
+static int
+dentry_clear_inode_visited(struct wim_dentry *dentry, void *_ignore)
+{
+ dentry->d_inode->i_visited = 0;
+ return 0;
+}
+
+/* Tally the features necessary to extract a dentry tree. */
+static void
+dentry_tree_get_features(struct wim_dentry *root, struct wim_features *features)
+{
+ memset(features, 0, sizeof(struct wim_features));
+ for_dentry_in_tree(root, dentry_tally_features, features);
+ for_dentry_in_tree(root, dentry_clear_inode_visited, NULL);
+}
+
+static int
+do_feature_check(const struct wim_features *required_features,
+ const struct wim_features *supported_features,
+ int extract_flags,
+ const struct apply_operations *ops)
+{
+ if (required_features->archive_files && !supported_features->archive_files)
+ {
+ WARNING(
+ "%lu files are marked as archived, but this attribute\n"
+" is not supported in this extraction mode or volume.",
+ required_features->archive_files);
+ }
+
+ if (required_features->hidden_files && !supported_features->hidden_files)
+ {
+ WARNING(
+ "%lu files are marked as hidden, but this attribute\n"
+" is not supported in this extraction mode or volume.",
+ required_features->hidden_files);
+ }
+
+ if (required_features->system_files && !supported_features->system_files)
+ {
+ WARNING(
+ "%lu files are marked as system files, but this attribute\n"
+" is not supported in this extraction mode or volume.",
+ required_features->system_files);
+ }
+
+ if (required_features->compressed_files && !supported_features->compressed_files)
+ {
+ WARNING(
+ "%lu files are marked as being transparently compressed, but\n"
+" transparent compression is not supported in this extraction\n"
+" mode or volume. These files will be extracted as uncompressed.",
+ required_features->compressed_files);
+ }
+
+ if (required_features->encrypted_files && !supported_features->encrypted_files)
+ {
+ WARNING(
+ "%lu files are marked as being encrypted, but encryption is not\n"
+" supported in this extraction mode or volume. These files will be\n"
+" extracted as raw encrypted data instead.",
+ required_features->encrypted_files);
+ }
+
+ if (required_features->not_context_indexed_files &&
+ !supported_features->not_context_indexed_files)
+ {
+ WARNING(
+ "%lu files are marked as not content indexed, but this attribute\n"
+" is not supported in this extraction mode or volume.",
+ required_features->not_context_indexed_files);
+ }
+
+ if (required_features->sparse_files && !supported_features->sparse_files)
+ {
+ WARNING(
+ "%lu files are marked as sparse, but creating sparse files is not\n"
+" supported in this extraction mode or volume. These files will be\n"
+" extracted as non-sparse.",
+ required_features->not_context_indexed_files);
+ }
+
+ if (required_features->named_data_streams &&
+ !supported_features->named_data_streams)
+ {
+ WARNING(
+ "%lu files contain one or more alternate (named) data streams,\n"
+" which are not supported in this extraction mode or volume.\n"
+" Alternate data streams will NOT be extracted.",
+ required_features->named_data_streams);
+ }
+
+ if (unlikely(extract_flags & (WIMLIB_EXTRACT_FLAG_HARDLINK |
+ WIMLIB_EXTRACT_FLAG_SYMLINK)) &&
+ required_features->named_data_streams &&
+ supported_features->named_data_streams)
+ {
+ WARNING(
+ "%lu files contain one or more alternate (named) data streams,\n"
+" which are not supported in linked extraction mode.\n"
+" Alternate data streams will NOT be extracted.",
+ required_features->named_data_streams);
+ }
+
+ if (required_features->hard_links && !supported_features->hard_links)
+ {
+ WARNING(
+ "%lu files are hard links, but hard links are not supported in\n"
+" this extraction mode or volume. Hard links will be extracted as\n"
+" duplicate copies of the linked files.",
+ required_features->hard_links);
+ }
+
+ if (required_features->reparse_points && !supported_features->reparse_points)
+ {
+ if (supported_features->symlink_reparse_points) {
+ if (required_features->other_reparse_points) {
+ WARNING(
+ "%lu files are reparse points that are neither symbolic links\n"
+" nor junction points and are not supported in this extraction mode\n"
+" or volume. These reparse points will not be extracted.",
+ required_features->other_reparse_points);
+ }
+ } else {
+ WARNING(
+ "%lu files are reparse points, which are not supported in this\n"
+" extraction mode or volume and will not be extracted.",
+ required_features->reparse_points);
+ }
+ }
+
+ if (required_features->security_descriptors &&
+ !supported_features->security_descriptors)
+ {
+ WARNING(
+ "%lu files have Windows NT security descriptors, but extracting\n"
+" security descriptors is not supported in this extraction mode\n"
+" or volume. No security descriptors will be extracted.",
+ required_features->security_descriptors);
+ }
+
+ if (required_features->short_names && !supported_features->short_names)
+ {
+ WARNING(
+ "%lu files have short (DOS) names, but extracting short names\n"
+" is not supported in this extraction mode or volume. Short names\n"
+" will not be extracted.\n",
+ required_features->short_names);
+ }
+
+ if ((extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) &&
+ required_features->unix_data && !supported_features->unix_data)
+ {
+ ERROR("UNIX data not supported in this extraction mode "
+ "or volume", ops->name);
+ return WIMLIB_ERR_UNSUPPORTED;
+ }
+ if ((extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_SHORT_NAMES) &&
+ required_features->short_names && !supported_features->short_names)
+ {
+ ERROR("Short names are not supported in this extraction "
+ "mode or volume", ops->name);
+ return WIMLIB_ERR_UNSUPPORTED;
+ }
+ if ((extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_TIMESTAMPS) &&
+ !ops->set_timestamps)
+ {
+ ERROR("Timestamps are not supported in this extraction "
+ "mode or volume", ops->name);
+ return WIMLIB_ERR_UNSUPPORTED;
+ }
+ if (((extract_flags & (WIMLIB_EXTRACT_FLAG_STRICT_ACLS |
+ WIMLIB_EXTRACT_FLAG_UNIX_DATA))
+ == WIMLIB_EXTRACT_FLAG_STRICT_ACLS) &&
+ required_features->security_descriptors &&
+ !supported_features->security_descriptors)
+ {
+ ERROR("Security descriptors not supported in this extraction "
+ "mode or volume.");
+ return WIMLIB_ERR_UNSUPPORTED;
+ }
+
+ if ((extract_flags & WIMLIB_EXTRACT_FLAG_HARDLINK) &&
+ !supported_features->hard_links)
{
- utf16lechar utf16_name_copy[dentry->file_name_nbytes / 2];
-
- memcpy(utf16_name_copy, dentry->file_name, dentry->file_name_nbytes);
- file_name_valid(utf16_name_copy, dentry->file_name_nbytes / 2, true);
-
- tchar *tchar_name;
- size_t tchar_nchars;
- #ifdef __WIN32__
- tchar_name = utf16_name_copy;
- tchar_nchars = dentry->file_name_nbytes / 2;
- #else
- ret = utf16le_to_tstr(utf16_name_copy,
- dentry->file_name_nbytes,
- &tchar_name, &tchar_nchars);
- if (ret)
- return ret;
- #endif
- size_t fixed_name_num_chars = tchar_nchars;
- tchar fixed_name[tchar_nchars + 50];
-
- tmemcpy(fixed_name, tchar_name, tchar_nchars);
- fixed_name_num_chars += tsprintf(fixed_name + tchar_nchars,
- T(" (invalid filename #%lu)"),
- ++args->invalid_sequence);
- #ifndef __WIN32__
- FREE(tchar_name);
- #endif
- dentry->extraction_name = memdup(fixed_name, 2 * fixed_name_num_chars + 2);
- if (!dentry->extraction_name)
- return WIMLIB_ERR_NOMEM;
- dentry->extraction_name_nchars = fixed_name_num_chars;
+ ERROR("Hard link extraction mode requested, but "
+ "extraction mode or volume does not support hard links!");
+ return WIMLIB_ERR_UNSUPPORTED;
}
- return 0;
-skip_dentry:
- dentry->needs_extraction = 0;
- dentry->not_extracted = 1;
- return 0;
-}
-
-static int
-dentry_reset_needs_extraction(struct wim_dentry *dentry, void *_ignore)
-{
- struct wim_inode *inode = dentry->d_inode;
- dentry->needs_extraction = 0;
- dentry->not_extracted = 0;
- inode->i_visited = 0;
- inode->i_dos_name_extracted = 0;
- FREE(inode->i_extracted_file);
- inode->i_extracted_file = NULL;
- if ((void*)dentry->extraction_name != (void*)dentry->file_name)
- FREE(dentry->extraction_name);
- dentry->extraction_name = NULL;
+ if ((extract_flags & WIMLIB_EXTRACT_FLAG_SYMLINK) &&
+ !supported_features->symlink_reparse_points)
+ {
+ ERROR("Symbolic link extraction mode requested, but "
+ "extraction mode or volume does not support symbolic "
+ "links!");
+ return WIMLIB_ERR_UNSUPPORTED;
+ }
return 0;
}
-#define WINDOWS_NT_MAX_PATH 32768
-
/*
* extract_tree - Extract a file or directory tree from the currently selected
* WIM image.
*
* @wim: WIMStruct for the WIM file, with the desired image selected
* (as wim->current_image).
+ *
* @wim_source_path:
* "Canonical" (i.e. no leading or trailing slashes, path
- * separators forwald slashes) path inside the WIM image to
+ * separators WIM_PATH_SEPARATOR) path inside the WIM image to
* extract. An empty string means the full image.
+ *
* @target:
* Filesystem path to extract the file or directory tree to.
+ * (Or, with WIMLIB_EXTRACT_FLAG_NTFS: the name of a NTFS volume.)
*
* @extract_flags:
* WIMLIB_EXTRACT_FLAG_*. Also, the private flag
*
* @progress_func:
* If non-NULL, progress function for the extraction. The messages
- * we may in this function are:
+ * that may be sent in this function are:
*
* WIMLIB_PROGRESS_MSG_EXTRACT_TREE_BEGIN or
* WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN;
* WIMLIB_PROGRESS_MSG_EXTRACT_TREE_END or
* WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END.
*
- * Returns 0 on success; nonzero on failure.
+ * Returns 0 on success; a positive WIMLIB_ERR_* code on failure.
*/
static int
extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target,
int extract_flags, wimlib_progress_func_t progress_func)
{
- int ret;
- struct list_head stream_list;
- struct apply_args args;
- const struct apply_operations *ops;
struct wim_dentry *root;
+ struct wim_features required_features;
+ struct apply_ctx ctx;
+ int ret;
+ struct wim_lookup_table_entry *lte;
- memset(&args, 0, sizeof(args));
-
-
- args.w = wim;
- args.target = target;
- args.target_nchars = tstrlen(target);
- args.extract_flags = extract_flags;
- args.progress_func = progress_func;
-
-#ifdef __WIN32__
- /* Work around defective behavior in Windows where paths longer than 260
- * characters are not supported by default; instead they need to be
- * turned into absolute paths and prefixed with "\\?\". */
- args.target_lowlevel_path = MALLOC(WINDOWS_NT_MAX_PATH * sizeof(wchar_t));
- if (!args.target_lowlevel_path)
- {
- ret = WIMLIB_ERR_NOMEM;
- goto out;
- }
- args.target_lowlevel_path_nchars =
- GetFullPathName(args.target, WINDOWS_NT_MAX_PATH - 4,
- &args.target_lowlevel_path[4], NULL);
-
- if (args.target_lowlevel_path_nchars == 0 ||
- args.target_lowlevel_path_nchars >= WINDOWS_NT_MAX_PATH - 4)
- {
- WARNING("Can't get full path name for \"%ls\"", args.target);
- FREE(args.target_lowlevel_path);
- args.target_lowlevel_path = NULL;
- } else {
- wmemcpy(args.target_lowlevel_path, L"\\\\?\\", 4);
- args.target_lowlevel_path_nchars += 4;
- }
-#endif
-
+ /* Start initializing the apply_ctx. */
+ memset(&ctx, 0, sizeof(struct apply_ctx));
+ ctx.wim = wim;
+ ctx.extract_flags = extract_flags;
+ ctx.target = target;
+ ctx.target_nchars = tstrlen(target);
+ ctx.progress_func = progress_func;
if (progress_func) {
- args.progress.extract.wimfile_name = wim->filename;
- args.progress.extract.image = wim->current_image;
- args.progress.extract.extract_flags = (extract_flags &
- WIMLIB_EXTRACT_MASK_PUBLIC);
- args.progress.extract.image_name = wimlib_get_image_name(wim,
- wim->current_image);
- args.progress.extract.extract_root_wim_source_path = wim_source_path;
- args.progress.extract.target = target;
+ ctx.progress.extract.wimfile_name = wim->filename;
+ ctx.progress.extract.image = wim->current_image;
+ ctx.progress.extract.extract_flags = (extract_flags &
+ WIMLIB_EXTRACT_MASK_PUBLIC);
+ ctx.progress.extract.image_name = wimlib_get_image_name(wim,
+ wim->current_image);
+ ctx.progress.extract.extract_root_wim_source_path = wim_source_path;
+ ctx.progress.extract.target = target;
}
+ INIT_LIST_HEAD(&ctx.stream_list);
-#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 `%"TS"'",
- target);
- ret = WIMLIB_ERR_NTFS_3G;
- goto out_free_target_lowlevel_path;
- }
- ops = &ntfs_apply_operations;
- } else
-#endif
- ops = &normal_apply_operations;
-
+ /* Translate the path to extract into the corresponding
+ * `struct wim_dentry', which will be the root of the
+ * "dentry tree" to extract. */
root = get_dentry(wim, wim_source_path);
if (!root) {
ERROR("Path \"%"TS"\" does not exist in WIM image %d",
wim_source_path, wim->current_image);
ret = WIMLIB_ERR_PATH_DOES_NOT_EXIST;
- goto out_ntfs_umount;
+ goto out;
}
- args.extract_root = root;
- /* Calculate the actual filename component of each extracted dentry, and
- * in the process set the dentry->needs_extraction flag on dentries that
- * will be extracted. */
- ret = for_dentry_in_tree(root, dentry_calculate_extraction_path, &args);
+ ctx.extract_root = root;
+
+ /* Select the appropriate apply_operations based on the
+ * platform and extract_flags. */
+#ifdef __WIN32__
+ ctx.ops = &win32_apply_ops;
+#else
+ ctx.ops = &unix_apply_ops;
+#endif
+
+#ifdef WITH_NTFS_3G
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS)
+ ctx.ops = &ntfs_3g_apply_ops;
+#endif
+
+ /* Call the start_extract() callback. This gives the apply_operations
+ * implementation a chance to do any setup needed to access the volume.
+ * Furthermore, it's expected to set the supported features of this
+ * extraction mode (ctx.supported_features), which are determined at
+ * runtime as they may vary depending on the actual volume. These
+ * features are then compared with the actual features extracting this
+ * dentry tree requires. Some mismatches will merely produce warnings
+ * and the unsupported data will be ignored; others will produce errors.
+ */
+ ret = ctx.ops->start_extract(target, &ctx);
+ if (ret)
+ goto out;
+
+ dentry_tree_get_features(root, &required_features);
+ ret = do_feature_check(&required_features, &ctx.supported_features,
+ extract_flags, ctx.ops);
+ if (ret)
+ goto out_finish_or_abort_extract;
+
+ /* Figure out whether the root dentry is being extracted to the root of
+ * a volume and therefore needs to be treated "specially", for example
+ * not being explicitly created and not having attributes set. */
+ if (ctx.ops->target_is_root && ctx.ops->root_directory_is_special)
+ ctx.root_dentry_is_special = ctx.ops->target_is_root(target);
+
+ /* Calculate the actual filename component of each extracted dentry. In
+ * the process, set the dentry->extraction_skipped flag on dentries that
+ * are being skipped for some reason (e.g. invalid filename). */
+ ret = for_dentry_in_tree(root, dentry_calculate_extraction_path, &ctx);
if (ret)
goto out_dentry_reset_needs_extraction;
- /* Build a list of the streams that need to be extracted */
- ret = find_streams_for_extraction(root,
- &stream_list,
- wim->lookup_table, extract_flags);
+ /* Build the list of the streams that need to be extracted and
+ * initialize ctx.progress.extract with stream information. */
+ ret = for_dentry_in_tree(ctx.extract_root,
+ dentry_resolve_and_zero_lte_refcnt, &ctx);
if (ret)
goto out_dentry_reset_needs_extraction;
- /* Calculate the number of bytes of data that will be extracted */
- calculate_bytes_to_extract(&stream_list, extract_flags,
- &args.progress);
+ ret = for_dentry_in_tree(ctx.extract_root,
+ dentry_add_streams_to_extract, &ctx);
+ if (ret)
+ goto out_teardown_stream_list;
+
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE) {
+ /* When extracting from a pipe, the number of bytes of data to
+ * extract can't be determined in the normal way (examining the
+ * lookup table), since at this point all we have is a set of
+ * SHA1 message digests of streams that need to be extracted.
+ * However, we can get a reasonably accurate estimate by taking
+ * <TOTALBYTES> from the corresponding <IMAGE> in the WIM XML
+ * data. This does assume that a full image is being extracted,
+ * but currently there is no API for doing otherwise. */
+ ctx.progress.extract.total_bytes =
+ wim_info_get_image_total_bytes(wim->wim_info,
+ wim->current_image);
+ }
+ /* Handle the special case of extracting a file to standard
+ * output. In that case, "root" should be a single file, not a
+ * directory tree. (If not, extract_dentry_to_stdout() will
+ * return an error.) */
if (extract_flags & WIMLIB_EXTRACT_FLAG_TO_STDOUT) {
ret = extract_dentry_to_stdout(root);
- goto out_dentry_reset_needs_extraction;
+ goto out_teardown_stream_list;
}
- if (progress_func) {
- progress_func(*wim_source_path ? WIMLIB_PROGRESS_MSG_EXTRACT_TREE_BEGIN :
- WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN,
- &args.progress);
+ /* If a sequential extraction was specified, sort the streams to be
+ * extracted by their position in the WIM file so that the WIM file can
+ * be read sequentially. */
+ if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SEQUENTIAL |
+ WIMLIB_EXTRACT_FLAG_FROM_PIPE))
+ == WIMLIB_EXTRACT_FLAG_SEQUENTIAL)
+ {
+ ret = sort_stream_list_by_sequential_order(
+ &ctx.stream_list,
+ offsetof(struct wim_lookup_table_entry,
+ extraction_list));
+ if (ret)
+ goto out_teardown_stream_list;
}
- /* If a sequential extraction was specified, sort the streams to be
- * extracted by their position in the WIM file, so that the WIM file can
- * be read sequentially. */
- 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 (ctx.ops->realpath_works_on_nonexisting_files &&
+ ((extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX) ||
+ ctx.ops->requires_realtarget_in_paths))
+ {
+ ctx.realtarget = realpath(target, NULL);
+ if (!ctx.realtarget) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_teardown_stream_list;
}
+ ctx.realtarget_nchars = tstrlen(ctx.realtarget);
}
if (progress_func) {
- progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_BEGIN,
- &args.progress);
+ progress_func(*wim_source_path ? WIMLIB_PROGRESS_MSG_EXTRACT_TREE_BEGIN :
+ WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN,
+ &ctx.progress);
}
- /* Make the directory structure and extract empty files */
- args.extract_flags |= WIMLIB_EXTRACT_FLAG_NO_STREAMS;
- args.apply_dentry = ops->apply_dentry;
- ret = for_dentry_in_tree(root, maybe_apply_dentry, &args);
- args.extract_flags &= ~WIMLIB_EXTRACT_FLAG_NO_STREAMS;
- if (ret)
- goto out_dentry_reset_needs_extraction;
-
- if (progress_func) {
- progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_END,
- &args.progress);
+ if (!ctx.root_dentry_is_special)
+ {
+ tchar path[ctx.ops->path_max];
+ if (build_extraction_path(path, root, &ctx))
+ {
+ ret = extract_inode(path, &ctx, root->d_inode);
+ if (ret)
+ goto out_free_realtarget;
+ }
}
- if (extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX) {
- args.target_realpath = realpath(target, NULL);
- if (!args.target_realpath) {
+ /* If we need to fix up the targets of absolute symbolic links
+ * (WIMLIB_EXTRACT_FLAG_RPFIX) or the extraction mode requires paths to
+ * be absolute, use realpath() (or its replacement on Windows) to get
+ * the absolute path to the extraction target. Note that this requires
+ * the target directory to exist, unless
+ * realpath_works_on_nonexisting_files is set in the apply_operations.
+ * */
+ if (!ctx.realtarget &&
+ (((extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX) &&
+ required_features.symlink_reparse_points) ||
+ ctx.ops->requires_realtarget_in_paths))
+ {
+ ctx.realtarget = realpath(target, NULL);
+ if (!ctx.realtarget) {
ret = WIMLIB_ERR_NOMEM;
- goto out_dentry_reset_needs_extraction;
+ goto out_free_realtarget;
}
- args.target_realpath_len = tstrlen(args.target_realpath);
+ ctx.realtarget_nchars = tstrlen(ctx.realtarget);
}
- /* Extract non-empty files */
- ret = apply_stream_list(&stream_list, &args, ops, progress_func);
- if (ret)
- goto out_free_target_realpath;
+ /* Finally, the important part: extract the tree of files. */
+ if (extract_flags & (WIMLIB_EXTRACT_FLAG_SEQUENTIAL |
+ WIMLIB_EXTRACT_FLAG_FROM_PIPE)) {
+ /* Sequential extraction requested, so two passes are needed
+ * (one for directory structure, one for streams.) */
+ if (progress_func)
+ progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_BEGIN,
+ &ctx.progress);
+ ret = for_dentry_in_tree(root, dentry_extract_skeleton, &ctx);
+ if (ret)
+ goto out_free_realtarget;
+ if (progress_func)
+ progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_END,
+ &ctx.progress);
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE)
+ ret = extract_streams_from_pipe(&ctx);
+ else
+ ret = extract_stream_list(&ctx);
+ if (ret)
+ goto out_free_realtarget;
+ } else {
+ /* Sequential extraction was not requested, so we can make do
+ * with one pass where we both create the files and extract
+ * streams. */
+ if (progress_func)
+ progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_BEGIN,
+ &ctx.progress);
+ ret = for_dentry_in_tree(root, dentry_extract, &ctx);
+ if (ret)
+ goto out_free_realtarget;
+ if (progress_func)
+ progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_END,
+ &ctx.progress);
+ }
- if (progress_func) {
- progress_func(WIMLIB_PROGRESS_MSG_APPLY_TIMESTAMPS,
- &args.progress);
+ /* If the total number of bytes to extract was miscalculated, just jump
+ * to the calculated number in order to avoid confusing the progress
+ * function. This should only occur when extracting from a pipe. */
+ if (ctx.progress.extract.completed_bytes != ctx.progress.extract.total_bytes)
+ {
+ DEBUG("Calculated %"PRIu64" bytes to extract, but actually "
+ "extracted %"PRIu64,
+ ctx.progress.extract.total_bytes,
+ ctx.progress.extract.completed_bytes);
+ }
+ if (progress_func &&
+ ctx.progress.extract.completed_bytes < ctx.progress.extract.total_bytes)
+ {
+ ctx.progress.extract.completed_bytes = ctx.progress.extract.total_bytes;
+ progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS, &ctx.progress);
}
- /* Apply timestamps */
- ret = for_dentry_in_tree_depth(root,
- ops->apply_dentry_timestamps, &args);
+ /* Apply security descriptors and timestamps. This is done at the end,
+ * and in a depth-first manner, to prevent timestamps from getting
+ * changed by subsequent extract operations and to minimize the chance
+ * of the restored security descriptors getting in our way. */
+ if (progress_func)
+ progress_func(WIMLIB_PROGRESS_MSG_APPLY_TIMESTAMPS,
+ &ctx.progress);
+ ret = for_dentry_in_tree_depth(root, dentry_extract_final, &ctx);
if (ret)
- goto out_free_target_realpath;
+ goto out_free_realtarget;
if (progress_func) {
progress_func(*wim_source_path ? WIMLIB_PROGRESS_MSG_EXTRACT_TREE_END :
WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END,
- &args.progress);
+ &ctx.progress);
}
-out_free_target_realpath:
- FREE(args.target_realpath);
+
+ ret = 0;
+out_free_realtarget:
+ FREE(ctx.realtarget);
+out_teardown_stream_list:
+ /* Free memory allocated as part of the mapping from each
+ * wim_lookup_table_entry to the dentries that reference it. */
+ if (ctx.extract_flags & WIMLIB_EXTRACT_FLAG_SEQUENTIAL)
+ list_for_each_entry(lte, &ctx.stream_list, extraction_list)
+ if (lte->out_refcnt > ARRAY_LEN(lte->inline_lte_dentries))
+ FREE(lte->lte_dentries);
out_dentry_reset_needs_extraction:
for_dentry_in_tree(root, dentry_reset_needs_extraction, NULL);
-out_ntfs_umount:
-#ifdef WITH_NTFS_3G
- /* Unmount the NTFS volume */
- if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
- if (ntfs_umount(args.vol, FALSE) != 0) {
- ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%"TS"'",
- args.target);
- if (ret == 0)
- ret = WIMLIB_ERR_NTFS_3G;
- }
+out_finish_or_abort_extract:
+ if (ret) {
+ if (ctx.ops->abort_extract)
+ ctx.ops->abort_extract(&ctx);
+ } else {
+ if (ctx.ops->finish_extract)
+ ret = ctx.ops->finish_extract(&ctx);
}
-#endif
-out_free_target_lowlevel_path:
-#ifdef __WIN32__
- FREE(args.target_lowlevel_path);
-#endif
out:
return ret;
}
check_extract_command(struct wimlib_extract_command *cmd, int wim_header_flags)
{
int extract_flags;
- bool is_entire_image = (cmd->wim_source_path[0] == T('\0'));
/* Empty destination path? */
if (cmd->fs_dest_path[0] == T('\0'))
extract_flags = cmd->extract_flags;
- /* Specified both symlink and hardlink modes? */
+ /* Check for invalid flag combinations */
if ((extract_flags &
(WIMLIB_EXTRACT_FLAG_SYMLINK |
WIMLIB_EXTRACT_FLAG_HARDLINK)) == (WIMLIB_EXTRACT_FLAG_SYMLINK |
WIMLIB_EXTRACT_FLAG_HARDLINK))
return WIMLIB_ERR_INVALID_PARAM;
-#ifdef __WIN32__
- /* Wanted UNIX data on Windows? */
- if (extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
- ERROR("Extracting UNIX data is not supported on Windows");
+ if ((extract_flags &
+ (WIMLIB_EXTRACT_FLAG_NO_ACLS |
+ WIMLIB_EXTRACT_FLAG_STRICT_ACLS)) == (WIMLIB_EXTRACT_FLAG_NO_ACLS |
+ WIMLIB_EXTRACT_FLAG_STRICT_ACLS))
return WIMLIB_ERR_INVALID_PARAM;
- }
- /* Wanted linked extraction on Windows? (XXX This is possible, just not
- * implemented yet.) */
- if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
- WIMLIB_EXTRACT_FLAG_HARDLINK))
- {
- ERROR("Linked extraction modes are not supported on Windows");
+
+ if ((extract_flags &
+ (WIMLIB_EXTRACT_FLAG_RPFIX |
+ WIMLIB_EXTRACT_FLAG_NORPFIX)) == (WIMLIB_EXTRACT_FLAG_RPFIX |
+ WIMLIB_EXTRACT_FLAG_NORPFIX))
return WIMLIB_ERR_INVALID_PARAM;
- }
-#endif
if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
- /* NTFS-3g extraction mode requested */
-#ifdef WITH_NTFS_3G
- if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
- WIMLIB_EXTRACT_FLAG_HARDLINK))) {
- ERROR("Cannot specify symlink or hardlink flags when applying\n"
- " directly to a NTFS volume");
- return WIMLIB_ERR_INVALID_PARAM;
- }
- if (!is_entire_image &&
- (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS))
- {
- ERROR("When applying directly to a NTFS volume you can "
- "only extract a full image, not part of one");
- return WIMLIB_ERR_INVALID_PARAM;
- }
- if (extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
- ERROR("Cannot restore UNIX-specific data in "
- "the NTFS extraction mode");
- return WIMLIB_ERR_INVALID_PARAM;
- }
-#else
- ERROR("wimlib was compiled without support for NTFS-3g, so");
- ERROR("we cannot apply a WIM image directly to a NTFS volume");
+#ifndef WITH_NTFS_3G
+ ERROR("wimlib was compiled without support for NTFS-3g, so\n"
+ " we cannot apply a WIM image directly to a NTFS volume.");
return WIMLIB_ERR_UNSUPPORTED;
#endif
}
- if ((extract_flags & (WIMLIB_EXTRACT_FLAG_RPFIX |
- WIMLIB_EXTRACT_FLAG_NORPFIX)) ==
- (WIMLIB_EXTRACT_FLAG_RPFIX | WIMLIB_EXTRACT_FLAG_NORPFIX))
- {
- ERROR("Cannot specify RPFIX and NORPFIX flags at the same time!");
- return WIMLIB_ERR_INVALID_PARAM;
- }
-
if ((extract_flags & (WIMLIB_EXTRACT_FLAG_RPFIX |
WIMLIB_EXTRACT_FLAG_NORPFIX)) == 0)
{
/* Do reparse point fixups by default if the WIM header says
* they are enabled and we are extracting a full image. */
- if ((wim_header_flags & WIM_HDR_FLAG_RP_FIX) && is_entire_image)
+ if (wim_header_flags & WIM_HDR_FLAG_RP_FIX)
extract_flags |= WIMLIB_EXTRACT_FLAG_RPFIX;
}
- if (!is_entire_image && (extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX)) {
- ERROR("Cannot specify --rpfix when not extracting entire image");
- return WIMLIB_ERR_INVALID_PARAM;
+ /* TODO: Since UNIX data entries are stored in the file resources, in a
+ * completely sequential extraction they may come up before the
+ * corresponding file or symbolic link data. This needs to be handled
+ * better. */
+ if ((extract_flags & (WIMLIB_EXTRACT_FLAG_UNIX_DATA |
+ WIMLIB_EXTRACT_FLAG_SEQUENTIAL))
+ == (WIMLIB_EXTRACT_FLAG_UNIX_DATA |
+ WIMLIB_EXTRACT_FLAG_SEQUENTIAL))
+ {
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE) {
+ WARNING("Setting UNIX file/owner group may "
+ "be impossible on some\n"
+ " symbolic links "
+ "when applying from a pipe.");
+ } else {
+ extract_flags &= ~WIMLIB_EXTRACT_FLAG_SEQUENTIAL;
+ WARNING("Disabling sequential extraction for "
+ "UNIX data mode");
+ }
}
cmd->extract_flags = extract_flags;
}
-/* Internal function to execute extraction commands for a WIM image. */
+/* Internal function to execute extraction commands for a WIM image. The paths
+ * in the extract commands are expected to be already "canonicalized". */
static int
do_wimlib_extract_files(WIMStruct *wim,
int image,
return ret;
/* Make sure there are no streams in the WIM that have not been
- * checksummed yet. */
+ * checksummed yet. */
ret = wim_checksum_unhashed_streams(wim);
if (ret)
return ret;
return 0;
}
-/* Extract files or directories from a WIM image. */
+/* API function documented in wimlib.h */
WIMLIBAPI int
wimlib_extract_files(WIMStruct *wim,
int image,
const tchar *image_name;
struct stat stbuf;
+ extract_flags |= WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
+
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
+ ERROR("Cannot extract multiple images in NTFS extraction mode.");
+ return WIMLIB_ERR_INVALID_PARAM;
+ }
+
if (tstat(target, &stbuf)) {
- if (errno == ENOENT)
- {
- if (tmkdir(target, S_IRWXU | S_IRGRP | S_IXGRP |
- S_IROTH | S_IXOTH))
- {
+ if (errno == ENOENT) {
+ if (tmkdir(target, 0755)) {
ERROR_WITH_ERRNO("Failed to create directory \"%"TS"\"", target);
return WIMLIB_ERR_MKDIR;
}
return 0;
}
-/* Extracts a single image or all images from a WIM file to a directory or NTFS
- * volume. */
-WIMLIBAPI int
-wimlib_extract_image(WIMStruct *wim,
- int image,
- const tchar *target,
- int extract_flags,
- WIMStruct **additional_swms,
- unsigned num_additional_swms,
- wimlib_progress_func_t progress_func)
+static int
+do_wimlib_extract_image(WIMStruct *wim,
+ int image,
+ const tchar *target,
+ int extract_flags,
+ WIMStruct **additional_swms,
+ unsigned num_additional_swms,
+ wimlib_progress_func_t progress_func)
{
int ret;
- extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC;
-
- ret = verify_swm_set(wim, additional_swms, num_additional_swms);
- if (ret)
- return ret;
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE) {
+ wimlib_assert(wim->hdr.part_number == 1);
+ wimlib_assert(num_additional_swms == 0);
+ } else {
+ ret = verify_swm_set(wim, additional_swms, num_additional_swms);
+ if (ret)
+ return ret;
- if (num_additional_swms)
- merge_lookup_tables(wim, additional_swms, num_additional_swms);
+ if (num_additional_swms)
+ merge_lookup_tables(wim, additional_swms, num_additional_swms);
+ }
if (image == WIMLIB_ALL_IMAGES) {
- ret = extract_all_images(wim, target,
- extract_flags | WIMLIB_EXTRACT_FLAG_MULTI_IMAGE,
+ ret = extract_all_images(wim, target, extract_flags,
progress_func);
} else {
ret = extract_single_image(wim, image, target, extract_flags,
unmerge_lookup_table(wim);
return ret;
}
+
+/* API function documented in wimlib.h */
+WIMLIBAPI int
+wimlib_extract_image_from_pipe(int pipe_fd, const tchar *image_num_or_name,
+ const tchar *target, int extract_flags,
+ wimlib_progress_func_t progress_func)
+{
+ int ret;
+ WIMStruct *pwm;
+ struct filedes *in_fd;
+ int image;
+ unsigned i;
+
+ extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC;
+
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_TO_STDOUT)
+ return WIMLIB_ERR_INVALID_PARAM;
+
+ extract_flags |= WIMLIB_EXTRACT_FLAG_SEQUENTIAL;
+
+ /* Read the WIM header from the pipe and get a WIMStruct to represent
+ * the pipable WIM. Caveats: Unlike getting a WIMStruct with
+ * wimlib_open_wim(), getting a WIMStruct in this way will result in
+ * an empty lookup table, no XML data read, and no filename set. */
+ ret = open_wim_as_WIMStruct(&pipe_fd,
+ WIMLIB_OPEN_FLAG_FROM_PIPE |
+ WIMLIB_OPEN_FLAG_SPLIT_OK,
+ &pwm, progress_func);
+ if (ret)
+ return ret;
+
+ /* Sanity check to make sure this is a pipable WIM. */
+ if (pwm->hdr.magic != PWM_MAGIC) {
+ ERROR("The WIM being read from file descriptor %d "
+ "is not pipable!", pipe_fd);
+ ret = WIMLIB_ERR_NOT_PIPABLE;
+ goto out_wimlib_free;
+ }
+
+ /* Sanity check to make sure the first part of a pipable split WIM is
+ * sent over the pipe first. */
+ if (pwm->hdr.part_number != 1) {
+ ERROR("The first part of the split WIM must be "
+ "sent over the pipe first.");
+ ret = WIMLIB_ERR_INVALID_PIPABLE_WIM;
+ goto out_wimlib_free;
+ }
+
+ in_fd = &pwm->in_fd;
+ wimlib_assert(in_fd->offset == WIM_HEADER_DISK_SIZE);
+
+ /* As mentioned, the WIMStruct we created from the pipe does not have
+ * XML data yet. Fix this by reading the extra copy of the XML data
+ * that directly follows the header in pipable WIMs. (Note: see
+ * write_pipable_wim() for more details about the format of pipable
+ * WIMs.) */
+ {
+ struct wim_lookup_table_entry xml_lte;
+ ret = read_pwm_stream_header(pwm, &xml_lte, false);
+ if (ret)
+ goto out_wimlib_free;
+
+ if (!(xml_lte.resource_entry.flags & WIM_RESHDR_FLAG_METADATA))
+ {
+ ERROR("Expected XML data, but found non-metadata "
+ "stream.");
+ ret = WIMLIB_ERR_INVALID_PIPABLE_WIM;
+ goto out_wimlib_free;
+ }
+
+ copy_resource_entry(&pwm->hdr.xml_res_entry,
+ &xml_lte.resource_entry);
+
+ ret = read_wim_xml_data(pwm);
+ if (ret)
+ goto out_wimlib_free;
+ if (wim_info_get_num_images(pwm->wim_info) != pwm->hdr.image_count) {
+ ERROR("Image count in XML data is not the same as in WIM header.");
+ ret = WIMLIB_ERR_XML;
+ goto out_wimlib_free;
+ }
+ }
+
+ /* Get image index (this may use the XML data that was just read to
+ * resolve an image name). */
+ if (image_num_or_name) {
+ image = wimlib_resolve_image(pwm, image_num_or_name);
+ if (image == WIMLIB_NO_IMAGE) {
+ ERROR("\"%"TS"\" is not a valid image in the pipable WIM!",
+ image_num_or_name);
+ ret = WIMLIB_ERR_INVALID_IMAGE;
+ goto out_wimlib_free;
+ } else if (image == WIMLIB_ALL_IMAGES) {
+ ERROR("Applying all images from a pipe is not supported.");
+ ret = WIMLIB_ERR_INVALID_IMAGE;
+ goto out_wimlib_free;
+ }
+ } else {
+ if (pwm->hdr.image_count != 1) {
+ ERROR("No image was specified, but the pipable WIM "
+ "did not contain exactly 1 image");
+ ret = WIMLIB_ERR_INVALID_IMAGE;
+ goto out_wimlib_free;
+ }
+ image = 1;
+ }
+
+ /* Load the needed metadata resource. */
+ for (i = 1; i <= pwm->hdr.image_count; i++) {
+ struct wim_lookup_table_entry *metadata_lte;
+ struct wim_image_metadata *imd;
+
+ metadata_lte = new_lookup_table_entry();
+ if (!metadata_lte) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_wimlib_free;
+ }
+
+ ret = read_pwm_stream_header(pwm, metadata_lte, false);
+ imd = pwm->image_metadata[i - 1];
+ imd->metadata_lte = metadata_lte;
+ if (ret)
+ goto out_wimlib_free;
+
+ if (!(metadata_lte->resource_entry.flags &
+ WIM_RESHDR_FLAG_METADATA))
+ {
+ ERROR("Expected metadata resource, but found "
+ "non-metadata stream.");
+ ret = WIMLIB_ERR_INVALID_PIPABLE_WIM;
+ goto out_wimlib_free;
+ }
+
+ if (i == image) {
+ /* Metadata resource is for the images being extracted.
+ * Parse it and save the metadata in memory. */
+ ret = read_metadata_resource(pwm, imd);
+ if (ret)
+ goto out_wimlib_free;
+ imd->modified = 1;
+ } else {
+ /* Metadata resource is not for the image being
+ * extracted. Skip over it. */
+ ret = skip_pwm_stream(metadata_lte);
+ if (ret)
+ goto out_wimlib_free;
+ }
+ }
+ /* Extract the image. */
+ extract_flags |= WIMLIB_EXTRACT_FLAG_FROM_PIPE;
+ ret = do_wimlib_extract_image(pwm, image, target,
+ extract_flags, NULL, 0, progress_func);
+ /* Clean up and return. */
+out_wimlib_free:
+ wimlib_free(pwm);
+ return ret;
+}
+
+/* API function documented in wimlib.h */
+WIMLIBAPI int
+wimlib_extract_image(WIMStruct *wim,
+ int image,
+ const tchar *target,
+ int extract_flags,
+ WIMStruct **additional_swms,
+ unsigned num_additional_swms,
+ wimlib_progress_func_t progress_func)
+{
+ extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC;
+ return do_wimlib_extract_image(wim, image, target, extract_flags,
+ additional_swms, num_additional_swms,
+ progress_func);
+}
git://wimlib.net / wimlib / blobdiff