topic Re: cataching SIGKILL using trap in Operating System - Linux

cataching SIGKILL using trap

itai weisman — Sun, 16 Oct 2005 14:32:48 GMT

hi everyone,
I'm trying to catch a '9' signal using the following command -
trap "Clean ; Killed " 1 3 4 5 9 15 INT QUIT TSTP KILL
on a regular simple bourne shell script,
but it wouldn't catched...
is it possible to catch KILL signal by trap command?

Re: cataching SIGKILL using trap

Alex Lavrov. — Sun, 16 Oct 2005 15:16:00 GMT

It's impossible.

SIGKILL cannot be trapped, otherwise it loses it's purpose to kill things.

Alex.

Re: cataching SIGKILL using trap

A. Clay Stephenson — Sun, 16 Oct 2005 17:00:45 GMT

Get used to disappointed. If you do a man 2 signal (the underlying mechanism for traps), you will find that SIGKILL can neither be caught or ignored.

Re: cataching SIGKILL using trap

Torsten. — Sun, 16 Oct 2005 17:23:25 GMT

You may perhaps ignore a red traffic light, but your processes will never ignore a SIGKILL.

Re: cataching SIGKILL using trap

itai weisman — Sun, 16 Oct 2005 18:03:24 GMT

thanks

Re: cataching SIGKILL using trap

Alex Lavrov. — Mon, 17 Oct 2005 02:51:24 GMT

Assiging points to the people that helped you, can be a very nice gesture .....

Alex.