C++ program that catches SIGKILL under Linux

Question

I want to make a core when my process receive the SIGKILL in linux. I try to caught this signal, but it seems that SIGKILL can't be catch.

You are correct. `SIGKILL` cannot be caught. That's how Linux and Unix have worked for the last 50 years, or so. I, somehow, doubt that this will ever change. — Sam Varshavchik, Feb 19 '20 at 03:28
Thanks! I think that is not a good idea. i'll try some other method. — user9280007, Feb 20 '20 at 03:34

score 1 · Accepted Answer · answered Feb 19 '20 at 03:29

That is correct, As per the man page for sigaction:

signum specifies the signal and can be any valid signal except SIGKILL and SIGSTOP.

This has pretty much been the case forever, you really don't want to give a process the ability to handle all signals since that would allow you to get to a point where it can only be killed by a power cycle :-)

C++ program that catches SIGKILL under Linux

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