-void static save_tty_state();
-void static disable_tty_echo();
-void static restore_tty_state();
-static RETSIGTYPE sigint_handler();
+static void save_tty_state(void);
+static void disable_tty_echo(void);
+static void restore_tty_state(void);
+static RETSIGTYPE sigint_handler(int);