Signal is used to send signals to processes, or setup handlers for receiving signals. It is currently only supported on unix.
The following signal commands are available:
Method Description alarm(secs) Setup alarm in seconds callback(func,sig) Setup callback handler for signal default(?sig,sig,...?) Set named signals to default action handle(?sig,sig,...?) Set named signals to handle action ignore(?sig,sig,...?) Set named signals to ignore action kill(pid?,sig?) Send signal to process id (default SIGTERM) names() Return names of all signals