Welly Santosa welly@mediawaresolutions.com
Wed Dec 4 19:01:00 GMT 2002


Thanks for your reply. I have tried your suggestion, and I got this 
error message saying that:

    kill 2304: Operation not permitted

where 2304 being the PID. Any more suggestion?

Thank you,


Igor Pechtchanski wrote:

>On Thu, 5 Dec 2002, Welly Santosa wrote:
>>I would like to set the maximum CPU time into a few minutes only. When I
>>tried to use ulimit (using CYGWIN), it gave me this:
>>$ ulimit -t 100
>>bash: ulimit: cpu time: cannot modify limit: Invalid argument
>>So, is this option not supported? if not, is there any other option
>>where I can limit one process to be able to run
>>for only a limited amount of time?
>>PS: The reason for me doing this is so that I can check whether a
>>process loops forever.
>>Thank you in advance.
>>Best regards,
>>Welly Santosa
>>Software Engineer
>>Mediaware Solutions Pty Ltd.
>As far as I'm aware, ulimit doesn't work on Cygwin, sorry.
>However, yours is the easiest case to implement without ulimit: use a
>deadman timer, something like this:
>	#!/bin/sh
>	process-to-check &
>	WPID=$!
>	trap "kill -9 $WPID" INT
>	(sleep $duration; kill -9 $WPID) > /dev/null 2>&1 &
>	SPID=$!
>	wait $WPID
>	RES=$?
>	kill -9 $SPID
>	exit $RES
>where 'process-to-check' is the process you want to limit, and 'duration'
>is the time limit (in seconds) that you want to impose.  You may need to
>do something more sophisticated if your process can spawn other processes.
>Hope this helps...
>	Igor

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