+ size_t len = 0;
+ const struct wim_dentry *d;
+
+ d = dentry;
+ do {
+ len += d->d_extraction_name_nchars + 1;
+ d = d->d_parent;
+ } while (!dentry_is_root(d) && will_extract_dentry(d));
+
+ return --len; /* No leading slash */
+}
+
+/* Returns the length of the longest string that might need to be appended to
+ * the path to an alias of an inode to open or create a named data stream.
+ *
+ * If the inode has no named data streams, this will be 0. Otherwise, this will
+ * be 1 plus the length of the longest-named data stream, since the data stream
+ * name must be separated from the path by the ':' character. */
+static size_t
+inode_longest_named_data_stream_spec(const struct wim_inode *inode)
+{
+ size_t max = 0;
+ for (unsigned i = 0; i < inode->i_num_streams; i++) {
+ const struct wim_inode_stream *strm = &inode->i_streams[i];
+ if (!stream_is_named_data_stream(strm))
+ continue;
+ size_t len = utf16le_len_chars(strm->stream_name);
+ if (len > max)
+ max = len;
+ }
+ if (max)
+ max += 1;
+ return max;
+}
+
+/* Find the length, in wide characters, of the longest path needed for
+ * extraction of any file in @dentry_list relative to the target directory.
+ *
+ * Accounts for named data streams, but does not include null terminator (not
+ * needed for NtCreateFile). */
+static size_t
+compute_path_max(struct list_head *dentry_list)
+{
+ size_t max = 0;
+ const struct wim_dentry *dentry;
+
+ list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
+ size_t len;
+
+ len = dentry_extraction_path_length(dentry);
+
+ /* Account for named data streams */
+ len += inode_longest_named_data_stream_spec(dentry->d_inode);
+
+ if (len > max)
+ max = len;
+ }
+
+ return max;
+}
+
+/* Build the path at which to extract the @dentry, relative to the target
+ * directory.
+ *
+ * The path is saved in ctx->pathbuf. */
+static void
+build_extraction_path(const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ size_t len;
+ wchar_t *p;
+ const struct wim_dentry *d;
+
+ len = dentry_extraction_path_length(dentry);
+
+ ctx->pathbuf.Length = len * sizeof(wchar_t);
+ p = ctx->pathbuf.Buffer + len;
+ for (d = dentry;
+ !dentry_is_root(d->d_parent) && will_extract_dentry(d->d_parent);
+ d = d->d_parent)
+ {
+ p -= d->d_extraction_name_nchars;
+ if (d->d_extraction_name_nchars)
+ wmemcpy(p, d->d_extraction_name,
+ d->d_extraction_name_nchars);
+ *--p = '\\';
+ }
+ /* No leading slash */
+ p -= d->d_extraction_name_nchars;
+ wmemcpy(p, d->d_extraction_name, d->d_extraction_name_nchars);
+}
+
+/* Build the path at which to extract the @dentry, relative to the target
+ * directory, adding the suffix for a named data stream.
+ *
+ * The path is saved in ctx->pathbuf. */
+static void
+build_extraction_path_with_ads(const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx,
+ const wchar_t *stream_name,
+ size_t stream_name_nchars)
+{
+ wchar_t *p;
+
+ build_extraction_path(dentry, ctx);
+
+ /* Add :NAME for named data stream */
+ p = ctx->pathbuf.Buffer + (ctx->pathbuf.Length / sizeof(wchar_t));
+ *p++ = L':';
+ wmemcpy(p, stream_name, stream_name_nchars);
+ ctx->pathbuf.Length += (1 + stream_name_nchars) * sizeof(wchar_t);
+}
+
+/* Build the Win32 namespace path to the specified @dentry when extracted.
+ *
+ * The path is saved in ctx->pathbuf and will be null terminated.
+ *
+ * XXX: We could get rid of this if it wasn't needed for the file encryption
+ * APIs, and the registry manipulation in WIMBoot mode. */
+static void
+build_win32_extraction_path(const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ build_extraction_path(dentry, ctx);
+
+ /* Prepend target_ntpath to our relative path, then change \??\ into \\?\ */
+
+ memmove(ctx->pathbuf.Buffer +
+ (ctx->target_ntpath.Length / sizeof(wchar_t)) + 1,
+ ctx->pathbuf.Buffer, ctx->pathbuf.Length);
+ memcpy(ctx->pathbuf.Buffer, ctx->target_ntpath.Buffer,
+ ctx->target_ntpath.Length);
+ ctx->pathbuf.Buffer[ctx->target_ntpath.Length / sizeof(wchar_t)] = L'\\';
+ ctx->pathbuf.Length += ctx->target_ntpath.Length + sizeof(wchar_t);
+ ctx->pathbuf.Buffer[ctx->pathbuf.Length / sizeof(wchar_t)] = L'\0';
+
+ wimlib_assert(ctx->pathbuf.Length >= 4 * sizeof(wchar_t) &&
+ !wmemcmp(ctx->pathbuf.Buffer, L"\\??\\", 4));
+
+ ctx->pathbuf.Buffer[1] = L'\\';
+
+}
+
+/* Returns a "printable" representation of the last relative NT path that was
+ * constructed with build_extraction_path() or build_extraction_path_with_ads().
+ *
+ * This will be overwritten by the next call to this function. */
+static const wchar_t *
+current_path(struct win32_apply_ctx *ctx)
+{
+ wchar_t *p = ctx->print_buffer;
+
+ p = wmempcpy(p, ctx->common.target, ctx->common.target_nchars);
+ *p++ = L'\\';
+ p = wmempcpy(p, ctx->pathbuf.Buffer, ctx->pathbuf.Length / sizeof(wchar_t));
+ *p = L'\0';
+ return ctx->print_buffer;
+}
+
+/* Open handle to the target directory if it is not already open. If the target
+ * directory does not exist, this creates it. */
+static int
+open_target_directory(struct win32_apply_ctx *ctx)
+{
+ NTSTATUS status;
+
+ if (ctx->h_target)
+ return 0;
+
+ ctx->attr.Length = sizeof(ctx->attr);
+ ctx->attr.RootDirectory = NULL;
+ ctx->attr.ObjectName = &ctx->target_ntpath;
+
+ /* Don't use FILE_OPEN_REPARSE_POINT here; we want the extraction to
+ * happen at the directory "pointed to" by the reparse point. */
+ status = NtCreateFile(&ctx->h_target,
+ FILE_TRAVERSE,
+ &ctx->attr,
+ &ctx->iosb,
+ NULL,
+ 0,
+ FILE_SHARE_VALID_FLAGS,
+ FILE_OPEN_IF,
+ FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT,
+ NULL,
+ 0);
+ if (!NT_SUCCESS(status)) {
+ winnt_error(status, L"Can't open or create directory \"%ls\"",
+ ctx->common.target);
+ return WIMLIB_ERR_OPENDIR;
+ }
+ ctx->attr.RootDirectory = ctx->h_target;
+ ctx->attr.ObjectName = &ctx->pathbuf;
+ return 0;
+}
+
+static void
+close_target_directory(struct win32_apply_ctx *ctx)
+{
+ if (ctx->h_target) {
+ NtClose(ctx->h_target);
+ ctx->h_target = NULL;
+ ctx->attr.RootDirectory = NULL;
+ }
+}
+
+/*
+ * Ensures the target directory exists and opens a handle to it, in preparation
+ * of using paths relative to it.
+ */
+static int
+prepare_target(struct list_head *dentry_list, struct win32_apply_ctx *ctx)
+{
+ int ret;
+ size_t path_max;
+
+ ret = win32_path_to_nt_path(ctx->common.target, &ctx->target_ntpath);
+ if (ret)
+ return ret;
+
+ ret = open_target_directory(ctx);
+ if (ret)
+ return ret;
+
+ path_max = compute_path_max(dentry_list);
+ /* Add some extra for building Win32 paths for the file encryption APIs,
+ * and ensure we have at least enough to potentially use a 8.3 name for
+ * the last component. */
+ path_max += max(2 + (ctx->target_ntpath.Length / sizeof(wchar_t)),
+ 8 + 1 + 3);
+
+ ctx->pathbuf.MaximumLength = path_max * sizeof(wchar_t);
+ ctx->pathbuf.Buffer = MALLOC(ctx->pathbuf.MaximumLength);
+ if (!ctx->pathbuf.Buffer)
+ return WIMLIB_ERR_NOMEM;
+
+ ctx->print_buffer = MALLOC((ctx->common.target_nchars + 1 + path_max + 1) *
+ sizeof(wchar_t));
+ if (!ctx->print_buffer)
+ return WIMLIB_ERR_NOMEM;
+
+ return 0;
+}
+
+/* When creating an inode that will have a short (DOS) name, we create it using
+ * the long name associated with the short name. This ensures that the short
+ * name gets associated with the correct long name. */
+static struct wim_dentry *
+first_extraction_alias(const struct wim_inode *inode)
+{
+ struct wim_dentry *dentry;
+
+ inode_for_each_extraction_alias(dentry, inode)
+ if (dentry_has_short_name(dentry))
+ return dentry;
+ return inode_first_extraction_dentry(inode);
+}
+
+/*
+ * Set or clear FILE_ATTRIBUTE_COMPRESSED if the inherited value is different
+ * from the desired value.
+ *
+ * Note that you can NOT override the inherited value of
+ * FILE_ATTRIBUTE_COMPRESSED directly with NtCreateFile().
+ */
+static int
+adjust_compression_attribute(HANDLE h, const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ const bool compressed = (dentry->d_inode->i_attributes &
+ FILE_ATTRIBUTE_COMPRESSED);
+ FILE_BASIC_INFORMATION info;
+ USHORT compression_state;
+ NTSTATUS status;
+
+ if (ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES)
+ return 0;
+
+ if (!ctx->common.supported_features.compressed_files)
+ return 0;
+
+
+ /* Get current attributes */
+ status = NtQueryInformationFile(h, &ctx->iosb, &info, sizeof(info),
+ FileBasicInformation);
+ if (NT_SUCCESS(status) &&
+ compressed == !!(info.FileAttributes & FILE_ATTRIBUTE_COMPRESSED))
+ {
+ /* Nothing needs to be done. */
+ return 0;
+ }
+
+ /* Set the new compression state */
+
+ if (compressed)
+ compression_state = COMPRESSION_FORMAT_DEFAULT;
+ else
+ compression_state = COMPRESSION_FORMAT_NONE;
+
+ status = winnt_fsctl(h, FSCTL_SET_COMPRESSION,
+ &compression_state, sizeof(USHORT), NULL, 0, NULL);
+ if (NT_SUCCESS(status))
+ return 0;
+
+ winnt_error(status, L"Can't %s compression attribute on \"%ls\"",
+ (compressed ? "set" : "clear"), current_path(ctx));
+ return WIMLIB_ERR_SET_ATTRIBUTES;
+}
+
+/* Try to enable short name support on the target volume. If successful, return
+ * true. If unsuccessful, issue a warning and return false. */
+static bool
+try_to_enable_short_names(const wchar_t *volume)
+{
+ HANDLE h;
+ FILE_FS_PERSISTENT_VOLUME_INFORMATION info;
+ BOOL bret;
+ DWORD bytesReturned;
+
+ h = CreateFile(volume, GENERIC_WRITE,
+ FILE_SHARE_VALID_FLAGS, NULL, OPEN_EXISTING,
+ FILE_FLAG_BACKUP_SEMANTICS, NULL);
+ if (h == INVALID_HANDLE_VALUE)
+ goto fail;
+
+ info.VolumeFlags = 0;
+ info.FlagMask = PERSISTENT_VOLUME_STATE_SHORT_NAME_CREATION_DISABLED;
+ info.Version = 1;
+ info.Reserved = 0;
+
+ bret = DeviceIoControl(h, FSCTL_SET_PERSISTENT_VOLUME_STATE,
+ &info, sizeof(info), NULL, 0,
+ &bytesReturned, NULL);
+
+ CloseHandle(h);
+
+ if (!bret)
+ goto fail;
+ return true;
+
+fail:
+ win32_warning(GetLastError(),
+ L"Failed to enable short name support on %ls",
+ volume + 4);
+ return false;
+}
+
+static NTSTATUS
+remove_conflicting_short_name(const struct wim_dentry *dentry, struct win32_apply_ctx *ctx)
+{
+ wchar_t *name;
+ wchar_t *end;
+ NTSTATUS status;
+ HANDLE h;
+ size_t bufsize = offsetof(FILE_NAME_INFORMATION, FileName) +
+ (13 * sizeof(wchar_t));
+ u8 buf[bufsize] _aligned_attribute(8);
+ bool retried = false;
+ FILE_NAME_INFORMATION *info = (FILE_NAME_INFORMATION *)buf;
+
+ memset(buf, 0, bufsize);
+
+ /* Build the path with the short name. */
+ name = &ctx->pathbuf.Buffer[ctx->pathbuf.Length / sizeof(wchar_t)];
+ while (name != ctx->pathbuf.Buffer && *(name - 1) != L'\\')
+ name--;
+ end = mempcpy(name, dentry->d_short_name, dentry->d_short_name_nbytes);
+ ctx->pathbuf.Length = ((u8 *)end - (u8 *)ctx->pathbuf.Buffer);
+
+ /* Open the conflicting file (by short name). */
+ status = NtOpenFile(&h, GENERIC_WRITE | DELETE,
+ &ctx->attr, &ctx->iosb,
+ FILE_SHARE_VALID_FLAGS,
+ FILE_OPEN_REPARSE_POINT | FILE_OPEN_FOR_BACKUP_INTENT);
+ if (!NT_SUCCESS(status)) {
+ winnt_warning(status, L"Can't open \"%ls\"", current_path(ctx));
+ goto out;
+ }
+
+#if 0
+ WARNING("Overriding conflicting short name; path=\"%ls\"",
+ current_path(ctx));
+#endif
+
+ /* Try to remove the short name on the conflicting file. */
+
+retry:
+ status = NtSetInformationFile(h, &ctx->iosb, info, bufsize,
+ FileShortNameInformation);
+
+ if (status == STATUS_INVALID_PARAMETER && !retried) {
+
+ /* Microsoft forgot to make it possible to remove short names
+ * until Windows 7. Oops. Use a random short name instead. */
+
+ info->FileNameLength = 12 * sizeof(wchar_t);
+ for (int i = 0; i < 8; i++)
+ info->FileName[i] = 'A' + (rand() % 26);
+ info->FileName[8] = L'.';
+ info->FileName[9] = L'W';
+ info->FileName[10] = L'L';
+ info->FileName[11] = L'B';
+ info->FileName[12] = L'\0';
+ retried = true;
+ goto retry;
+ }
+ NtClose(h);
+out:
+ build_extraction_path(dentry, ctx);
+ return status;
+}
+
+/* Set the short name on the open file @h which has been created at the location
+ * indicated by @dentry.
+ *
+ * Note that this may add, change, or remove the short name.
+ *
+ * @h must be opened with DELETE access.
+ *
+ * Returns 0 or WIMLIB_ERR_SET_SHORT_NAME. The latter only happens in
+ * STRICT_SHORT_NAMES mode.
+ */
+static int
+set_short_name(HANDLE h, const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+
+ if (!ctx->common.supported_features.short_names)
+ return 0;
+
+ /*
+ * Note: The size of the FILE_NAME_INFORMATION buffer must be such that
+ * FileName contains at least 2 wide characters (4 bytes). Otherwise,
+ * NtSetInformationFile() will return STATUS_INFO_LENGTH_MISMATCH. This
+ * is despite the fact that FileNameLength can validly be 0 or 2 bytes,
+ * with the former case being removing the existing short name if
+ * present, rather than setting one.
+ *
+ * The null terminator is seemingly optional, but to be safe we include
+ * space for it and zero all unused space.
+ */
+
+ size_t bufsize = offsetof(FILE_NAME_INFORMATION, FileName) +
+ max(dentry->d_short_name_nbytes, sizeof(wchar_t)) +
+ sizeof(wchar_t);
+ u8 buf[bufsize] _aligned_attribute(8);
+ FILE_NAME_INFORMATION *info = (FILE_NAME_INFORMATION *)buf;
+ NTSTATUS status;
+ bool tried_to_remove_existing = false;
+
+ memset(buf, 0, bufsize);
+
+ info->FileNameLength = dentry->d_short_name_nbytes;
+ memcpy(info->FileName, dentry->d_short_name, dentry->d_short_name_nbytes);
+
+retry:
+ status = NtSetInformationFile(h, &ctx->iosb, info, bufsize,
+ FileShortNameInformation);
+ if (NT_SUCCESS(status))
+ return 0;
+
+ if (status == STATUS_SHORT_NAMES_NOT_ENABLED_ON_VOLUME) {
+ if (dentry->d_short_name_nbytes == 0)
+ return 0;
+ if (!ctx->tried_to_enable_short_names) {
+ wchar_t volume[7];
+ int ret;
+
+ ctx->tried_to_enable_short_names = true;
+
+ ret = win32_get_drive_path(ctx->common.target,
+ volume);
+ if (ret)
+ return ret;
+ if (try_to_enable_short_names(volume))
+ goto retry;
+ }
+ }
+
+ /*
+ * Short names can conflict in several cases:
+ *
+ * - a file being extracted has a short name conflicting with an
+ * existing file
+ *
+ * - a file being extracted has a short name conflicting with another
+ * file being extracted (possible, but shouldn't happen)
+ *
+ * - a file being extracted has a short name that conflicts with the
+ * automatically generated short name of a file we previously
+ * extracted, but failed to set the short name for. Sounds unlikely,
+ * but this actually does happen fairly often on versions of Windows
+ * prior to Windows 7 because they do not support removing short names
+ * from files.
+ */
+ if (unlikely(status == STATUS_OBJECT_NAME_COLLISION) &&
+ dentry->d_short_name_nbytes && !tried_to_remove_existing)
+ {
+ tried_to_remove_existing = true;
+ status = remove_conflicting_short_name(dentry, ctx);
+ if (NT_SUCCESS(status))
+ goto retry;
+ }
+
+ /* By default, failure to set short names is not an error (since short
+ * names aren't too important anymore...). */
+ if (!(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_SHORT_NAMES)) {
+ if (dentry->d_short_name_nbytes)
+ ctx->num_set_short_name_failures++;
+ else
+ ctx->num_remove_short_name_failures++;
+ return 0;
+ }
+
+ winnt_error(status, L"Can't set short name on \"%ls\"", current_path(ctx));
+ return WIMLIB_ERR_SET_SHORT_NAME;
+}
+
+/*
+ * A wrapper around NtCreateFile() to make it slightly more usable...
+ * This uses the path currently constructed in ctx->pathbuf.
+ *
+ * Also, we always specify SYNCHRONIZE access, FILE_OPEN_FOR_BACKUP_INTENT, and
+ * FILE_OPEN_REPARSE_POINT.
+ */
+static NTSTATUS
+do_create_file(PHANDLE FileHandle,
+ ACCESS_MASK DesiredAccess,
+ PLARGE_INTEGER AllocationSize,
+ ULONG FileAttributes,
+ ULONG CreateDisposition,
+ ULONG CreateOptions,
+ struct win32_apply_ctx *ctx)
+{
+ return NtCreateFile(FileHandle,
+ DesiredAccess | SYNCHRONIZE,
+ &ctx->attr,
+ &ctx->iosb,
+ AllocationSize,
+ FileAttributes,
+ FILE_SHARE_VALID_FLAGS,
+ CreateDisposition,
+ CreateOptions |
+ FILE_OPEN_FOR_BACKUP_INTENT |
+ FILE_OPEN_REPARSE_POINT,
+ NULL,
+ 0);
+}
+
+/* Like do_create_file(), but builds the extraction path of the @dentry first.
+ */
+static NTSTATUS
+create_file(PHANDLE FileHandle,
+ ACCESS_MASK DesiredAccess,
+ PLARGE_INTEGER AllocationSize,
+ ULONG FileAttributes,
+ ULONG CreateDisposition,
+ ULONG CreateOptions,
+ const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ build_extraction_path(dentry, ctx);
+ return do_create_file(FileHandle,
+ DesiredAccess,
+ AllocationSize,
+ FileAttributes,
+ CreateDisposition,
+ CreateOptions,
+ ctx);
+}
+
+static int
+delete_file_or_stream(struct win32_apply_ctx *ctx)
+{
+ NTSTATUS status;
+ HANDLE h;
+ ULONG perms = DELETE;
+ ULONG flags = FILE_NON_DIRECTORY_FILE | FILE_DELETE_ON_CLOSE;
+
+ /* First try opening the file with FILE_DELETE_ON_CLOSE. In most cases,
+ * all we have to do is that plus close the file handle. */
+retry:
+ status = do_create_file(&h, perms, NULL, 0, FILE_OPEN, flags, ctx);
+
+ if (unlikely(status == STATUS_CANNOT_DELETE)) {
+ /* This error occurs for files with FILE_ATTRIBUTE_READONLY set.
+ * Try an alternate approach: first open the file without
+ * FILE_DELETE_ON_CLOSE, then reset the file attributes, then
+ * set the "delete" disposition on the handle. */
+ if (flags & FILE_DELETE_ON_CLOSE) {
+ flags &= ~FILE_DELETE_ON_CLOSE;
+ perms |= FILE_WRITE_ATTRIBUTES;
+ goto retry;
+ }
+ }
+
+ if (unlikely(!NT_SUCCESS(status))) {
+ winnt_error(status, L"Can't open \"%ls\" for deletion "
+ "(perms=%x, flags=%x)",
+ current_path(ctx), perms, flags);
+ return WIMLIB_ERR_OPEN;
+ }
+
+ if (unlikely(!(flags & FILE_DELETE_ON_CLOSE))) {
+
+ FILE_BASIC_INFORMATION basic_info =
+ { .FileAttributes = FILE_ATTRIBUTE_NORMAL };
+ status = NtSetInformationFile(h, &ctx->iosb, &basic_info,
+ sizeof(basic_info),
+ FileBasicInformation);
+
+ if (!NT_SUCCESS(status)) {
+ winnt_error(status, L"Can't reset attributes of \"%ls\" "
+ "to prepare for deletion", current_path(ctx));
+ NtClose(h);
+ return WIMLIB_ERR_SET_ATTRIBUTES;
+ }
+
+ FILE_DISPOSITION_INFORMATION disp_info =
+ { .DoDeleteFile = TRUE };
+ status = NtSetInformationFile(h, &ctx->iosb, &disp_info,
+ sizeof(disp_info),
+ FileDispositionInformation);
+ if (!NT_SUCCESS(status)) {
+ winnt_error(status, L"Can't set delete-on-close "
+ "disposition on \"%ls\"", current_path(ctx));
+ NtClose(h);
+ return WIMLIB_ERR_SET_ATTRIBUTES;
+ }
+ }
+
+ status = NtClose(h);
+ if (unlikely(!NT_SUCCESS(status))) {
+ winnt_error(status, L"Error closing \"%ls\" after setting "
+ "delete-on-close disposition", current_path(ctx));
+ return WIMLIB_ERR_OPEN;
+ }
+
+ return 0;
+}
+
+/*
+ * Create a nondirectory file or named data stream at the current path,
+ * superseding any that already exists at that path. If successful, return an
+ * open handle to the file or named data stream.
+ */
+static int
+supersede_file_or_stream(struct win32_apply_ctx *ctx, HANDLE *h_ret)
+{
+ NTSTATUS status;
+ bool retried = false;
+
+ /* FILE_ATTRIBUTE_SYSTEM is needed to ensure that
+ * FILE_ATTRIBUTE_ENCRYPTED doesn't get set before we want it to be. */
+retry:
+ status = do_create_file(h_ret,
+ GENERIC_READ | GENERIC_WRITE | DELETE,
+ NULL,
+ FILE_ATTRIBUTE_SYSTEM,
+ FILE_CREATE,
+ FILE_NON_DIRECTORY_FILE,
+ ctx);
+ if (likely(NT_SUCCESS(status)))
+ return 0;
+
+ /* STATUS_OBJECT_NAME_COLLISION means that the file or stream already
+ * exists. Delete the existing file or stream, then try again.
+ *
+ * Note: we don't use FILE_OVERWRITE_IF or FILE_SUPERSEDE because of
+ * problems with certain file attributes, especially
+ * FILE_ATTRIBUTE_ENCRYPTED. FILE_SUPERSEDE is also broken in the
+ * Windows PE ramdisk. */
+ if (status == STATUS_OBJECT_NAME_COLLISION && !retried) {
+ int ret = delete_file_or_stream(ctx);
+ if (ret)
+ return ret;
+ retried = true;
+ goto retry;
+ }
+ winnt_error(status, L"Can't create \"%ls\"", current_path(ctx));
+ return WIMLIB_ERR_OPEN;
+}
+
+/* Set the reparse point @rpbuf of length @rpbuflen on the extracted file
+ * corresponding to the WIM dentry @dentry. */
+static int
+do_set_reparse_point(const struct wim_dentry *dentry,
+ const struct reparse_buffer_disk *rpbuf, u16 rpbuflen,
+ struct win32_apply_ctx *ctx)
+{
+ NTSTATUS status;
+ HANDLE h;
+
+ status = create_file(&h, GENERIC_WRITE, NULL,
+ 0, FILE_OPEN, 0, dentry, ctx);
+ if (!NT_SUCCESS(status))
+ goto fail;
+
+ status = winnt_fsctl(h, FSCTL_SET_REPARSE_POINT,
+ rpbuf, rpbuflen, NULL, 0, NULL);
+ NtClose(h);
+
+ if (NT_SUCCESS(status))
+ return 0;
+
+ /* On Windows, by default only the Administrator can create symbolic
+ * links for some reason. By default we just issue a warning if this
+ * appears to be the problem. Use WIMLIB_EXTRACT_FLAG_STRICT_SYMLINKS
+ * to get a hard error. */
+ if (!(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_SYMLINKS)
+ && (status == STATUS_PRIVILEGE_NOT_HELD ||
+ status == STATUS_ACCESS_DENIED)
+ && (dentry->d_inode->i_reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK ||
+ dentry->d_inode->i_reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT))
+ {
+ WARNING("Can't create symbolic link \"%ls\"! \n"
+ " (Need Administrator rights, or at least "
+ "the\n"
+ " SeCreateSymbolicLink privilege.)",
+ current_path(ctx));
+ return 0;
+ }
+
+fail:
+ winnt_error(status, L"Can't set reparse data on \"%ls\"",
+ current_path(ctx));
+ return WIMLIB_ERR_SET_REPARSE_DATA;
+}
+
+/*
+ * Create empty named data streams and potentially a reparse point for the
+ * specified file, if any.
+ *
+ * Since these won't have blob descriptors, they won't show up in the call to
+ * extract_blob_list(). Hence the need for the special case.
+ */
+static int
+create_empty_streams(const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ const struct wim_inode *inode = dentry->d_inode;
+ int ret;
+
+ for (unsigned i = 0; i < inode->i_num_streams; i++) {
+ const struct wim_inode_stream *strm = &inode->i_streams[i];
+
+ if (stream_blob_resolved(strm) != NULL)
+ continue;
+
+ if (strm->stream_type == STREAM_TYPE_REPARSE_POINT &&
+ ctx->common.supported_features.reparse_points)
+ {
+ u8 buf[REPARSE_DATA_OFFSET] _aligned_attribute(8);
+ struct reparse_buffer_disk *rpbuf =
+ (struct reparse_buffer_disk *)buf;
+ complete_reparse_point(rpbuf, inode, 0);
+ ret = do_set_reparse_point(dentry, rpbuf,
+ REPARSE_DATA_OFFSET, ctx);
+ if (ret)
+ return ret;
+ } else if (stream_is_named_data_stream(strm) &&
+ ctx->common.supported_features.named_data_streams)
+ {
+ HANDLE h;
+
+ build_extraction_path_with_ads(dentry, ctx,
+ strm->stream_name,
+ utf16le_len_chars(strm->stream_name));
+ ret = supersede_file_or_stream(ctx, &h);
+
+ build_extraction_path(dentry, ctx);
+
+ if (ret)
+ return ret;
+ NtClose(h);
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Creates the directory named by @dentry, or uses an existing directory at that
+ * location. If necessary, sets the short name and/or fixes compression and
+ * encryption attributes.
+ *
+ * Returns 0, WIMLIB_ERR_MKDIR, or WIMLIB_ERR_SET_SHORT_NAME.
+ */
+static int
+create_directory(const struct wim_dentry *dentry, struct win32_apply_ctx *ctx)
+{
+ DWORD perms;
+ NTSTATUS status;
+ HANDLE h;
+ int ret;
+
+ /* DELETE is needed for set_short_name(); GENERIC_READ and GENERIC_WRITE
+ * are needed for adjust_compression_attribute(); WRITE_DAC is needed to
+ * remove the directory's DACL if the directory already existed */
+ perms = GENERIC_READ | GENERIC_WRITE | WRITE_DAC;
+ if (!dentry_is_root(dentry))
+ perms |= DELETE;
+
+ /* FILE_ATTRIBUTE_SYSTEM is needed to ensure that
+ * FILE_ATTRIBUTE_ENCRYPTED doesn't get set before we want it to be. */
+retry:
+ status = create_file(&h, perms, NULL, FILE_ATTRIBUTE_SYSTEM,
+ FILE_OPEN_IF, FILE_DIRECTORY_FILE, dentry, ctx);
+ if (unlikely(!NT_SUCCESS(status))) {
+ if (status == STATUS_ACCESS_DENIED) {
+ if (perms & WRITE_DAC) {
+ perms &= ~WRITE_DAC;
+ goto retry;
+ }
+ if (perms & DELETE) {
+ perms &= ~DELETE;
+ goto retry;
+ }
+ }
+ const wchar_t *path = current_path(ctx);
+ winnt_error(status, L"Can't create directory \"%ls\"", path);
+
+ /* Check for known issue with WindowsApps directory. */
+ if (status == STATUS_ACCESS_DENIED &&
+ (wcsstr(path, L"\\WindowsApps\\") ||
+ wcsstr(path, L"\\InfusedApps\\"))) {
+ ERROR(
+"You seem to be trying to extract files to the WindowsApps directory.\n"
+" Windows 8.1 and later use new file permissions in this directory that\n"
+" cannot be overridden, even by backup/restore programs. To extract your\n"
+" files anyway, you need to choose a different target directory, delete\n"
+" the WindowsApps directory entirely, reformat the volume, do the\n"
+" extraction from a non-broken operating system such as Windows 7 or\n"
+" Linux, or wait for Microsoft to fix the design flaw in their operating\n"
+" system. This is *not* a bug in wimlib. See this thread for more\n"
+" information: https://wimlib.net/forums/viewtopic.php?f=1&t=261");
+ }
+ return WIMLIB_ERR_MKDIR;
+ }
+
+ if (ctx->iosb.Information == FILE_OPENED) {
+ /* If we opened an existing directory, try to clear its file
+ * attributes. As far as I know, this only actually makes a
+ * difference in the case where a FILE_ATTRIBUTE_READONLY
+ * directory has a named data stream which needs to be
+ * extracted. You cannot create a named data stream of such a
+ * directory, even though this contradicts Microsoft's
+ * documentation for FILE_ATTRIBUTE_READONLY which states it is
+ * not honored for directories! */
+ if (!(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES)) {
+ FILE_BASIC_INFORMATION basic_info =
+ { .FileAttributes = FILE_ATTRIBUTE_NORMAL };
+ NtSetInformationFile(h, &ctx->iosb, &basic_info,
+ sizeof(basic_info),
+ FileBasicInformation);
+ }
+
+ /* Also try to remove the directory's DACL. This isn't supposed
+ * to be necessary because we *always* use backup semantics.
+ * However, there is a case where NtCreateFile() fails with
+ * STATUS_ACCESS_DENIED when creating a named data stream that
+ * was just deleted, using a directory-relative open. I have no
+ * idea why Windows is broken in this case. */
+ if (!(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS)) {
+ static const SECURITY_DESCRIPTOR_RELATIVE desc = {
+ .Revision = SECURITY_DESCRIPTOR_REVISION1,
+ .Control = SE_SELF_RELATIVE | SE_DACL_PRESENT,
+ .Owner = 0,
+ .Group = 0,
+ .Sacl = 0,
+ .Dacl = 0,
+ };
+ NtSetSecurityObject(h, DACL_SECURITY_INFORMATION,
+ (void *)&desc);
+ }
+ }
+
+ if (!dentry_is_root(dentry)) {
+ ret = set_short_name(h, dentry, ctx);
+ if (ret)
+ goto out;
+ }
+
+ ret = adjust_compression_attribute(h, dentry, ctx);
+out:
+ NtClose(h);
+ return ret;
+}
+
+/*
+ * Create all the directories being extracted, other than the target directory
+ * itself.
+ *
+ * Note: we don't honor directory hard links. However, we don't allow them to
+ * exist in WIM images anyway (see inode_fixup.c).
+ */
+static int
+create_directories(struct list_head *dentry_list,
+ struct win32_apply_ctx *ctx)
+{
+ const struct wim_dentry *dentry;
+ int ret;
+
+ list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
+
+ if (!(dentry->d_inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY))
+ continue;
+
+ /* Note: Here we include files with
+ * FILE_ATTRIBUTE_DIRECTORY|FILE_ATTRIBUTE_REPARSE_POINT, but we
+ * wait until later to actually set the reparse data. */
+
+ ret = create_directory(dentry, ctx);
+
+ if (!ret)
+ ret = create_empty_streams(dentry, ctx);
+
+ ret = check_apply_error(dentry, ctx, ret);
+ if (ret)
+ return ret;
+
+ ret = report_file_created(&ctx->common);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+/*
+ * Creates the nondirectory file named by @dentry.
+ *
+ * On success, returns an open handle to the file in @h_ret, with GENERIC_READ,
+ * GENERIC_WRITE, and DELETE access. Also, the path to the file will be saved
+ * in ctx->pathbuf. On failure, returns an error code.
+ */
+static int
+create_nondirectory_inode(HANDLE *h_ret, const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ int ret;
+ HANDLE h;
+
+ build_extraction_path(dentry, ctx);
+
+ ret = supersede_file_or_stream(ctx, &h);
+ if (ret)
+ goto out;
+
+ ret = adjust_compression_attribute(h, dentry, ctx);
+ if (ret)
+ goto out_close;
+
+ ret = create_empty_streams(dentry, ctx);
+ if (ret)
+ goto out_close;
+
+ *h_ret = h;
+ return 0;
+
+out_close:
+ NtClose(h);
+out:
+ return ret;
+}
+
+/* Creates a hard link at the location named by @dentry to the file represented
+ * by the open handle @h. Or, if the target volume does not support hard links,
+ * create a separate file instead. */
+static int
+create_link(HANDLE h, const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ if (ctx->common.supported_features.hard_links) {
+
+ build_extraction_path(dentry, ctx);
+
+ size_t bufsize = offsetof(FILE_LINK_INFORMATION, FileName) +
+ ctx->pathbuf.Length + sizeof(wchar_t);
+ u8 buf[bufsize] _aligned_attribute(8);
+ FILE_LINK_INFORMATION *info = (FILE_LINK_INFORMATION *)buf;
+ NTSTATUS status;
+
+ info->ReplaceIfExists = TRUE;
+ info->RootDirectory = ctx->attr.RootDirectory;
+ info->FileNameLength = ctx->pathbuf.Length;
+ memcpy(info->FileName, ctx->pathbuf.Buffer, ctx->pathbuf.Length);
+ info->FileName[info->FileNameLength / 2] = L'\0';
+
+ /* Note: the null terminator isn't actually necessary,
+ * but if you don't add the extra character, you get
+ * STATUS_INFO_LENGTH_MISMATCH when FileNameLength
+ * happens to be 2 */
+
+ status = NtSetInformationFile(h, &ctx->iosb, info, bufsize,
+ FileLinkInformation);
+ if (NT_SUCCESS(status))
+ return 0;
+ winnt_error(status, L"Failed to create link \"%ls\"",
+ current_path(ctx));
+ return WIMLIB_ERR_LINK;
+ } else {
+ HANDLE h2;
+ int ret;
+
+ ret = create_nondirectory_inode(&h2, dentry, ctx);
+ if (ret)
+ return ret;
+
+ NtClose(h2);
+ return 0;
+ }
+}
+
+/* Given an inode (represented by the open handle @h) for which one link has
+ * been created (named by @first_dentry), create the other links.
+ *
+ * Or, if the target volume does not support hard links, create separate files.
+ *
+ * Note: This uses ctx->pathbuf and does not reset it.
+ */
+static int
+create_links(HANDLE h, const struct wim_dentry *first_dentry,
+ struct win32_apply_ctx *ctx)
+{
+ const struct wim_inode *inode = first_dentry->d_inode;
+ const struct wim_dentry *dentry;
+ int ret;
+
+ inode_for_each_extraction_alias(dentry, inode) {
+ if (dentry != first_dentry) {
+ ret = create_link(h, dentry, ctx);
+ if (ret)
+ return ret;
+ }
+ }
+ return 0;
+}
+
+/* Create a nondirectory file, including all links. */
+static int
+create_nondirectory(struct wim_inode *inode, struct win32_apply_ctx *ctx)
+{
+ struct wim_dentry *first_dentry;
+ HANDLE h;
+ int ret;
+
+ first_dentry = first_extraction_alias(inode);
+
+ /* Create first link. */
+ ret = create_nondirectory_inode(&h, first_dentry, ctx);
+ if (ret)
+ return ret;
+
+ /* Set short name. */
+ ret = set_short_name(h, first_dentry, ctx);
+
+ /* Create additional links, OR if hard links are not supported just
+ * create more files. */
+ if (!ret)
+ ret = create_links(h, first_dentry, ctx);
+
+ /* "WIMBoot" extraction: set external backing by the WIM file if needed. */
+ if (!ret && unlikely(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_WIMBOOT))
+ ret = set_backed_from_wim(h, inode, ctx);
+
+ NtClose(h);
+ return ret;
+}
+
+/* Create all the nondirectory files being extracted, including all aliases
+ * (hard links). */
+static int
+create_nondirectories(struct list_head *dentry_list, struct win32_apply_ctx *ctx)
+{
+ struct wim_dentry *dentry;
+ struct wim_inode *inode;
+ int ret;
+
+ list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
+ inode = dentry->d_inode;
+ if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY)
+ continue;
+ /* Call create_nondirectory() only once per inode */
+ if (dentry == inode_first_extraction_dentry(inode)) {
+ ret = create_nondirectory(inode, ctx);
+ ret = check_apply_error(dentry, ctx, ret);
+ if (ret)
+ return ret;
+ }
+ ret = report_file_created(&ctx->common);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+static void
+close_handles(struct win32_apply_ctx *ctx)
+{
+ for (unsigned i = 0; i < ctx->num_open_handles; i++)
+ NtClose(ctx->open_handles[i]);
+}
+
+/* Prepare to read the next blob, which has size @blob_size, into an in-memory
+ * buffer. */
+static bool
+prepare_data_buffer(struct win32_apply_ctx *ctx, u64 blob_size)
+{
+ if (blob_size > ctx->data_buffer_size) {
+ /* Larger buffer needed. */
+ void *new_buffer;
+ if ((size_t)blob_size != blob_size)
+ return false;
+ new_buffer = REALLOC(ctx->data_buffer, blob_size);
+ if (!new_buffer)
+ return false;
+ ctx->data_buffer = new_buffer;
+ ctx->data_buffer_size = blob_size;
+ }
+ /* On the first call this changes data_buffer_ptr from NULL, which tells
+ * extract_chunk() that the data buffer needs to be filled while reading
+ * the stream data. */
+ ctx->data_buffer_ptr = ctx->data_buffer;
+ return true;
+}
+
+static int
+begin_extract_blob_instance(const struct blob_descriptor *blob,
+ struct wim_dentry *dentry,
+ const struct wim_inode_stream *strm,
+ struct win32_apply_ctx *ctx)
+{
+ FILE_ALLOCATION_INFORMATION alloc_info;
+ HANDLE h;
+ NTSTATUS status;
+
+ if (unlikely(strm->stream_type == STREAM_TYPE_REPARSE_POINT)) {
+ /* We can't write the reparse point stream directly; we must set
+ * it with FSCTL_SET_REPARSE_POINT, which requires that all the
+ * data be available. So, stage the data in a buffer. */
+ if (!prepare_data_buffer(ctx, blob->size))
+ return WIMLIB_ERR_NOMEM;
+ list_add_tail(&dentry->d_tmp_list, &ctx->reparse_dentries);
+ return 0;
+ }
+
+ if (unlikely(strm->stream_type == STREAM_TYPE_EFSRPC_RAW_DATA)) {
+ /* We can't write encrypted files directly; we must use
+ * WriteEncryptedFileRaw(), which requires providing the data
+ * through a callback function. This can't easily be combined
+ * with our own callback-based approach.
+ *
+ * The current workaround is to simply read the blob into memory
+ * and write the encrypted file from that.
+ *
+ * TODO: This isn't sufficient for extremely large encrypted
+ * files. Perhaps we should create an extra thread to write
+ * such files... */
+ if (!prepare_data_buffer(ctx, blob->size))
+ return WIMLIB_ERR_NOMEM;
+ list_add_tail(&dentry->d_tmp_list, &ctx->encrypted_dentries);
+ return 0;
+ }
+
+ /* It's a data stream (may be unnamed or named). */
+ wimlib_assert(strm->stream_type == STREAM_TYPE_DATA);
+
+ if (ctx->num_open_handles == MAX_OPEN_FILES) {
+ /* XXX: Fix this. But because of the checks in
+ * extract_blob_list(), this can now only happen on a filesystem
+ * that does not support hard links. */
+ ERROR("Can't extract data: too many open files!");
+ return WIMLIB_ERR_UNSUPPORTED;
+ }
+
+
+ if (unlikely(stream_is_named(strm))) {
+ build_extraction_path_with_ads(dentry, ctx,
+ strm->stream_name,
+ utf16le_len_chars(strm->stream_name));
+ } else {
+ build_extraction_path(dentry, ctx);
+ }
+
+
+ /* Open a new handle */
+ status = do_create_file(&h,
+ FILE_WRITE_DATA | SYNCHRONIZE,
+ NULL, 0, FILE_OPEN_IF,
+ FILE_SEQUENTIAL_ONLY |
+ FILE_SYNCHRONOUS_IO_NONALERT,
+ ctx);
+ if (!NT_SUCCESS(status)) {
+ winnt_error(status, L"Can't open \"%ls\" for writing",
+ current_path(ctx));
+ return WIMLIB_ERR_OPEN;
+ }
+
+ ctx->open_handles[ctx->num_open_handles++] = h;
+
+ /* Allocate space for the data. */
+ alloc_info.AllocationSize.QuadPart = blob->size;
+ NtSetInformationFile(h, &ctx->iosb, &alloc_info, sizeof(alloc_info),
+ FileAllocationInformation);
+ return 0;
+}
+
+/* Given a Windows NT namespace path, such as \??\e:\Windows\System32, return a
+ * pointer to the suffix of the path that begins with the device directly, such
+ * as e:\Windows\System32. */
+static const wchar_t *
+skip_nt_toplevel_component(const wchar_t *path, size_t path_nchars)
+{
+ static const wchar_t * const dirs[] = {
+ L"\\??\\",
+ L"\\DosDevices\\",
+ L"\\Device\\",
+ };
+ const wchar_t * const end = path + path_nchars;
+
+ for (size_t i = 0; i < ARRAY_LEN(dirs); i++) {
+ size_t len = wcslen(dirs[i]);
+ if (len <= (end - path) && !wmemcmp(path, dirs[i], len)) {
+ path += len;
+ while (path != end && *path == L'\\')
+ path++;
+ return path;
+ }
+ }
+ return path;
+}
+
+/*
+ * Given a Windows NT namespace path, such as \??\e:\Windows\System32, return a
+ * pointer to the suffix of the path that is device-relative but possibly with
+ * leading slashes, such as \Windows\System32.
+ *
+ * The path has an explicit length and is not necessarily null terminated.
+ */
+static const wchar_t *
+get_device_relative_path(const wchar_t *path, size_t path_nchars)
+{
+ const wchar_t * const orig_path = path;
+ const wchar_t * const end = path + path_nchars;
+
+ path = skip_nt_toplevel_component(path, path_nchars);
+ if (path == orig_path)
+ return orig_path;
+
+ while (path != end && *path != L'\\')
+ path++;
+
+ return path;
+}
+
+/*
+ * Given a reparse point buffer for an inode for which the absolute link target
+ * was relativized when it was archived, de-relative the link target to be
+ * consistent with the actual extraction location.
+ */
+static void
+try_rpfix(struct reparse_buffer_disk *rpbuf, u16 *rpbuflen_p,
+ struct win32_apply_ctx *ctx)
+{
+ struct link_reparse_point link;
+ size_t orig_subst_name_nchars;
+ const wchar_t *relpath;
+ size_t relpath_nchars;
+ size_t target_ntpath_nchars;
+ size_t fixed_subst_name_nchars;
+ const wchar_t *fixed_print_name;
+ size_t fixed_print_name_nchars;
+
+ /* Do nothing if the reparse data is invalid. */
+ if (parse_link_reparse_point(rpbuf, *rpbuflen_p, &link))
+ return;
+
+ /* Do nothing if the reparse point is a relative symbolic link. */
+ if (link_is_relative_symlink(&link))
+ return;
+
+ /* Build the new substitute name from the NT namespace path to the
+ * target directory, then a path separator, then the "device relative"
+ * part of the old substitute name. */
+
+ orig_subst_name_nchars = link.substitute_name_nbytes / sizeof(wchar_t);
+
+ relpath = get_device_relative_path(link.substitute_name,
+ orig_subst_name_nchars);
+ relpath_nchars = orig_subst_name_nchars -
+ (relpath - link.substitute_name);
+
+ target_ntpath_nchars = ctx->target_ntpath.Length / sizeof(wchar_t);
+
+ /* If the target directory is a filesystem root, such as \??\C:\, then
+ * it already will have a trailing slash. Don't include this slash if
+ * we are already adding slashes via 'relpath'. This prevents an extra
+ * slash from being generated each time the link is extracted. And
+ * unlike on UNIX, the number of slashes in paths on Windows can be
+ * significant; Windows won't understand the link target if it contains
+ * too many slashes. */
+ if (target_ntpath_nchars > 0 && relpath_nchars > 0 &&
+ ctx->target_ntpath.Buffer[target_ntpath_nchars - 1] == L'\\')
+ target_ntpath_nchars--;
+
+ /* Also remove extra slashes from the beginning of 'relpath'. Normally
+ * this isn't needed, but this is here to make the extra slash(es) added
+ * by wimlib pre-v1.9.1 get removed automatically. */
+ while (relpath_nchars >= 2 &&
+ relpath[0] == L'\\' && relpath[1] == L'\\') {
+ relpath++;
+ relpath_nchars--;
+ }
+
+ fixed_subst_name_nchars = target_ntpath_nchars + relpath_nchars;
+
+ wchar_t fixed_subst_name[fixed_subst_name_nchars];
+
+ wmemcpy(fixed_subst_name, ctx->target_ntpath.Buffer, target_ntpath_nchars);
+ wmemcpy(&fixed_subst_name[target_ntpath_nchars], relpath, relpath_nchars);
+ /* Doesn't need to be null-terminated. */
+
+ /* Print name should be Win32, but not all NT names can even be
+ * translated to Win32 names. But we can at least delete the top-level
+ * directory, such as \??\, and this will have the expected result in
+ * the usual case. */
+ fixed_print_name = skip_nt_toplevel_component(fixed_subst_name,
+ fixed_subst_name_nchars);
+ fixed_print_name_nchars = fixed_subst_name_nchars - (fixed_print_name -
+ fixed_subst_name);
+
+ link.substitute_name = fixed_subst_name;
+ link.substitute_name_nbytes = fixed_subst_name_nchars * sizeof(wchar_t);
+ link.print_name = (wchar_t *)fixed_print_name;
+ link.print_name_nbytes = fixed_print_name_nchars * sizeof(wchar_t);
+ make_link_reparse_point(&link, rpbuf, rpbuflen_p);
+}
+
+/* Sets the reparse point on the specified file. This handles "fixing" the
+ * targets of absolute symbolic links and junctions if WIMLIB_EXTRACT_FLAG_RPFIX
+ * was specified. */
+static int
+set_reparse_point(const struct wim_dentry *dentry,
+ const struct reparse_buffer_disk *rpbuf, u16 rpbuflen,
+ struct win32_apply_ctx *ctx)
+{
+ if ((ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX)
+ && !(dentry->d_inode->i_rp_flags & WIM_RP_FLAG_NOT_FIXED))
+ {
+ memcpy(&ctx->rpfixbuf, rpbuf, rpbuflen);
+ try_rpfix(&ctx->rpfixbuf, &rpbuflen, ctx);
+ rpbuf = &ctx->rpfixbuf;
+ }
+ return do_set_reparse_point(dentry, rpbuf, rpbuflen, ctx);
+
+}
+
+/* Import the next block of raw encrypted data */
+static DWORD WINAPI
+import_encrypted_data(PBYTE pbData, PVOID pvCallbackContext, PULONG Length)
+{
+ struct win32_apply_ctx *ctx = pvCallbackContext;
+ ULONG copy_len;
+
+ copy_len = min(ctx->encrypted_size - ctx->encrypted_offset, *Length);
+ memcpy(pbData, &ctx->data_buffer[ctx->encrypted_offset], copy_len);
+ ctx->encrypted_offset += copy_len;
+ *Length = copy_len;
+ return ERROR_SUCCESS;
+}
+
+/*
+ * Write the raw encrypted data to the already-created file (or directory)
+ * corresponding to @dentry.
+ *
+ * The raw encrypted data is provided in ctx->data_buffer, and its size is
+ * ctx->encrypted_size.
+ *
+ * This function may close the target directory, in which case the caller needs
+ * to re-open it if needed.
+ */
+static int
+extract_encrypted_file(const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ void *rawctx;