[ILUG] kill signals

[Adrian Flynn]

I'm sorry, I'm a newbie at this kind of thing. How would I go about this
given the existing command line below?

The idea is that the process would be stopped and restarted by a cron job
each night.

Thanks

Adrian

-----Original Message-----
From: Hunt, Bryan [mailto:B.Hunt at emuse.ie]
Sent: 11 January 2002 09:41
To: 'adrian.flynn at worldtravel.ie'; ilug at linux.ie
Subject: RE: [ILUG] kill signals


you could get the pids of the child processes when you start them in a
sub-shell and then catch the signal using trap and then terminate the
sub-shell from your script. Perhaps this is a bit messy though.

B--

-----Original Message-----
From: Adrian Flynn [mailto:adrian.flynn at worldtravel.ie]
Sent: 11 January 2002 09:35
To: ilug at linux.ie
Subject: [ILUG] kill signals


Hi

What is the correct kill signal to close a process and ALL its child
processes cleanly? I am trying to stop and restart a shell script which
pipes serial port data through several text procesing command. THere are 4
processes in the process table for the script. When I kill -SIGINT, or
kill -SIGTERM the shell processes, the other child processes remain running.
Note it is important that all files are properly closed on termination so I
cannot use SIGKILL.

The command line is of the form:
cat /dev/ttyS0 |tr '\r' '\n' |csplit --digits=10 --prefix=~/`date
"+%Y-%m-%d-%H:%M:%S"`_ --elide-empty-files - /^L/ {*}

This, within a shell script, results in the following processes:
	bash
	cat
	tr
	csplit

If I SIGINT or SIGTERM the bash process, the others remain running

Many thanks in advance
Adrian

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Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.309 / Virus Database: 170 - Release Date: 17/12/2001