-char *fn_get_cwd (void);
-
-int fn_is_absolute (const char *fn);
-int fn_is_special (const char *fn);
-int fn_exists (const char *fn);
-char *fn_readlink (const char *fn);
+bool fn_is_absolute (const char *fn);
+bool fn_is_special (const char *fn);
+bool fn_exists (const char *fn);