What happens to the semaphore file if the script falls over before it
gets around to removing it?
--
shaikh i


Kirt Thomas wrote:
> Semaphore files are your friend. Here's a snippet to add to the
> beginning of your script...
>
> FN=/tmp/flag.tmp
> if [ -f $FN ]; then
> touch $FN
> #Run your Script here
> rm $FN
> else
> echo "Script $program is already active
> fi
>
> The program starts, if it's not running (no semaphore file) then it
> creates the semaphore file and runs your script, other wise it exits.
>
> At 13:42 7/2/2006, benbart wrote:
>> Hi all,
>>
>> Does anyone have a smarter script to check whether a certain script is already
>> running and if so exit from the script instead of running another instance of
>> the script?
>>
>> At the moment, am checking it using ps -ef | grep [scriptname], but found out
>> that this is not a reliable test as someone could be more'ing or cat'ting a
>> file and I am mistakenly taking it as the script running ...
>>
>> Any advise or tips will be very much appreciated ... thanks in advance ...
>>
>>
>>
>>
>>
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>
>
>
> --------
> website: http://www.LazyDBA.com
> Please don't reply to RTFM questions
> Oracle documentation is here: http://tahiti.oracle.com
> To unsubscribe: see http://www.lazydba.com/unsubscribe.html
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