title: What keyboard signal apart from Ctrl-C can I catch?
body: <p>I have a (C, Linux) application which handles Ctrl-C SIGINT by shutting down.
  I'd like to add another signal handler so that I can use another keystroke combo for "reload configuration while running".</p>
  
  <p>So I'm looking from a signal I can send to the foreground process by keystroke, which doesn't force the process to quit or suspend. Are there any others?</p>