Re: How to use ``nice'' on a pipe?

[Wei Chen <wchenhk@gmail.com>]

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CaT wrote:
> On Sun, Mar 09, 2008 at 05:34:48PM +0800, Wei Chen wrote:
>> a low priority. How can I make both command1 and command2 on the pipe
>> running in the low priority? Thank you.
>>
>> =================================
>> #!/bin/sh
>> runprogram () {
>>   nice -n19 ionice -c2 -n7 "$@"
>> }
>> runprogram command1 | command2
> 
> This is one of those, once you see it it'll be the most bleedingly
> obvious things I think. :)
> 
> runprogram command1 | runprogram command2
> 
> :)
> 

That's true :)
In fact I was writing something like the following. Put the following
snippet at the head of the script, so that the whole script gets nice
value properly set...

if [[ $1 != "run-script-nicely" ]]
then
        nice -n19 $BASEDIR/$(basename $0) run-script-nicely
        exit 0
fi
echo 'original script here...'

But later I found it too strange for me, so I changed to what you have
mentioned... Thank you :)

- --
Cheers,

Wei Chen
http://www.acplex.com/people/wchen/
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