title: How can SIGINT can be raised by the system itself?
body: <p>I know that a SIGINT signal can be raised by the user with Crtl + C or a kill command, but what needs to happen for the system to raise a SIGINT by itself? This question comes to my mind because my system just caught a SIGINT signal while using the read() function in C to read incoming messages in a Unix-like real-time operating system, and it was not user-triggered.</p>
  <p>I've been looking on the Internet and I could not find anything related to a system-triggered SIGINT signal, so your help would be more than welcome.</p>