+/**
+ * Unescape string.
+ *
+ * @param str String possibly containing escaped characters.
+ * @return string with escaped characters replaced by single character values.
+ */
+extern std::string fgUnescape (const char *str);
+
+
+/**
+ * Validation listener interface for io.nas, used by fgcommands.
+ * @param path Path to be validated
+ * @param write True for write operations and false for read operations.
+ * @return The validated path on success or 0 if access denied.
+ */
+extern const char *fgValidatePath (const char *path, bool write);
+