Re: [SLUG] script question

[Mike Lake <Mike.Lake@xxxxxxxxxx>]

On Mon, Jul 30, 2001 at 01:50:03PM +1000, Bernhard Luder wrote:
> No, that's not what I mean. I know grep -v will match everything but.
> What I need is:
> if [a log file] does not contain "0% packet loss" specifically then do
> something (eg. restart interface) otherwise do nothing.
> I have no idea how to express this in a command. How will I get a command
> executed, if the log file does not contain "0% packet loss" specifically?

Perhaps I can help with narrowing down what you want algorithmicaly 
although not with specific code.

cat logfile | grep -v "0% packet loss" 
if this returns a string then that line does not have what we want
   sed s/that sring// # this removes the string from the log stream
else
   the line in the logfile contains "0% packet loss" so keep it in the stream.
   # ie do nothing
done

so what you want is to filter the log stream as above, removing all lines
that dont match "0% packet loss"
Perhaps others can fill in z code.

Mike
-- 
Ask not for whom the <CONTROL-G> tolls.

Michael Lake, University of Technology, Sydney
Work: Mike.Lake@xxxxxxxxxx Ph: 02 9514 1724 Fx: 02 9514 1628 
Home: http://www.speleonics.com.au
Linux enthusiast, active caver and interested in anything technical.
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