signal_handler     21 gameio.c           signal(SIGHUP, signal_handler);
signal_handler     22 gameio.c           signal(SIGINT, signal_handler);
signal_handler     23 gameio.c           signal(SIGILL, signal_handler);
signal_handler     24 gameio.c           signal(SIGTERM,signal_handler);
signal_handler     25 gameio.c           signal(SIGQUIT,signal_handler);