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It's said that the SIGQUIT signal cannot be caught by process,but the process response according to the signal which it catches,so why do process can be quitted by SIGQUIT?The process even don't catch(know) the signal

Half Dream
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  • I think you're mixing up SIGQUIT with SIGKILL, also this may help? In the case of SIGKILL the process never gets the signal and the system (the [linux] kernel) terminates the process). https://stackoverflow.com/questions/4042201/how-does-sigint-relate-to-the-other-termination-signals-such-as-sigterm-sigquit – Erwin Jun 18 '22 at 03:25
  • It's `SIGKILL` that cannot be caught, not `SIGQUIT`. – joanis Jun 18 '22 at 03:26
  • For signals that can be caught, a process can set a trap or signal handler that gets called when the process receives that signal. For SIGKILL, the OS just terminates the process without looking for any signal handlers. – joanis Jun 18 '22 at 03:27

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