While I sending kill -9 command to a program on ubuntu , I want to close other running processes before the program closes.I am trying this with c programming . Could it be something like this? How can I say program if you get KILL command you should do something?
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Answer
Per the POSIX standard <signal.h> documentation:
…
The following signals shall be supported on all implementations (default actions are explained below the table):
Signal Default Action Description .... SIGKILL T Kill (cannot be caught or ignored).
Note well the “cannot be caught or ignored”.
Your process never “sees” SIGKILL as the OS just kills the process without any notice.