catch kill -9 from unix command prompt

[Ken Lehman]

Is there a way for my program to execute a few lines of code before dying
when it is sent a kill -9 from a unix shell? The book I have says no, I
don't want to ignore the signal, just some clean up.
Thanks.
-Ken

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[Jensen Kenneth B Sra Afpc/Dpdmpq]

use sigtrap 'handler' => &sig_handler, KILL;

&sig_handler{
#your clean up code you want executed
}

sigtrap can be found on cpan, there are more ways to use it... Documented
there.

SrA Jensen

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[Bob Showalter]

> -----Original Message-----
> From: Ken Lehman [mailto:ken_l...@summithq.com]
> Sent: Tuesday, December 17, 2002 11:52 AM
> To: 'begi...@perl.org'
> Subject: catch kill -9 from unix command prompt
>
>
> Is there a way for my program to execute a few lines of code
> before dying
> when it is sent a kill -9 from a unix shell? The book I have
> says no, I
> don't want to ignore the signal, just some clean up.
> Thanks.

No. SIGKILL cannot be caught. If it could, you could prevent the sysadmin
from terminating your process.

SIGKILL is not designed for gracefully terminating. Use SIGTERM and/or
SIGINT for that, both of which can be caught.