+ /* Using NtQueryDirectoryFile() we can re-use the same open handle,
+ * which we opened with FILE_FLAG_BACKUP_SEMANTICS (probably not the
+ * case for the FindFirstFile() API; it's not documented). */
+#ifdef WITH_NTDLL
+ if (!func_NtQueryDirectoryFile)
+ goto use_FindFirstFile;
+
+ NTSTATUS status;
+ IO_STATUS_BLOCK io_status;
+ const size_t bufsize = 8192;
+ u8 *buf;
+ BOOL restartScan = TRUE;
+ const FILE_NAMES_INFORMATION *info;
+
+ buf = MALLOC(bufsize);
+ if (!buf)
+ return WIMLIB_ERR_NOMEM;
+ for (;;) {
+ status = (*func_NtQueryDirectoryFile)(hDir, NULL, NULL, NULL,
+ &io_status, buf, bufsize,
+ FileNamesInformation,
+ FALSE, NULL, restartScan);
+ restartScan = FALSE;
+ if (status != STATUS_SUCCESS) {
+ if (status == STATUS_NO_MORE_FILES ||
+ status == STATUS_NO_MORE_ENTRIES ||
+ status == STATUS_NO_MORE_MATCHES) {
+ ret = 0;
+ } else if (status == STATUS_NOT_IMPLEMENTED ||
+ status == STATUS_NOT_SUPPORTED ||
+ status == STATUS_INVALID_INFO_CLASS) {
+ FREE(buf);
+ goto use_FindFirstFile;
+ } else {
+ set_errno_from_nt_status(status);
+ ERROR_WITH_ERRNO("Failed to read directory "
+ "\"%ls\"", dir_path);
+ ret = WIMLIB_ERR_READ;
+ }
+ goto out_free_buf;
+ }
+ wimlib_assert(io_status.Information != 0);
+ info = (const FILE_NAMES_INFORMATION*)buf;
+ for (;;) {
+ if (!(info->FileNameLength == 2 && info->FileName[0] == L'.') &&
+ !(info->FileNameLength == 4 && info->FileName[0] == L'.' &&
+ info->FileName[1] == L'.'))
+ {
+ wchar_t *p;
+ struct wim_dentry *child;
+
+ p = dir_path + dir_path_num_chars;
+ *p++ = L'\\';
+ p = wmempcpy(p, info->FileName,
+ info->FileNameLength / 2);
+ *p = '\0';
+
+ ret = win32_build_dentry_tree_recursive(
+ &child,
+ dir_path,
+ p - dir_path,
+ params,
+ state,
+ vol_flags);
+
+ dir_path[dir_path_num_chars] = L'\0';
+
+ if (ret)
+ goto out_free_buf;
+ if (child)
+ dentry_add_child(root, child);
+ }
+ if (info->NextEntryOffset == 0)
+ break;
+ info = (const FILE_NAMES_INFORMATION*)
+ ((const u8*)info + info->NextEntryOffset);
+ }
+ }
+out_free_buf:
+ FREE(buf);
+ return ret;
+#endif
+
+use_FindFirstFile:
+ ;
+ WIN32_FIND_DATAW dat;
+ HANDLE hFind;
+ DWORD err;
+