Re: kill -9?

[Jesper Juhl]

On 06/07/07, Kaleem Khan <linuxuser8@xxxxxxxxx> wrote:
> Hello Kernel experts,
>
> I'd like to know whether there's a way to take some action (say
> calling a routine) in
> response to 'kill -9' before the process is terminated. I tend to
> think it's against 'kill -9'
> UNIX/Linux philosophy but still I'd like to confirm.
You can't catch/block SIGKILL (9), but you can catch SIGTERM (15 -
what kill sends by default).

A well behaved app should catch SIGTERM and do proper cleanup before
shutdown so that when a user does  kill <pid_of_app>  it shuts down
cleanly.  kill -9 <pid_of_app> shouldn't normally be needed - it is
for emergency termination of the app, which is why you can't catch it.

--
Jesper Juhl <jesper.juhl@xxxxxxxxx>
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