-struct string;
-void fn_interp_vars (struct string *target,
- const char *(*getenv) (const char *));
-char *fn_tilde_expand (const char *fn);
-char *fn_search_path (const char *base_name, const char *path,
- const char *prefix);
-char *fn_normalize (const char *fn);
+void fn_interp_vars (struct substring src,
+ const char *(*getenv) (const char *),
+ struct string *dst);
+char *fn_search_path (const char *base_name, const char *path);