On Wed, Jul 08, 1998 at 01:09:27PM -0700, Patrick Olson wrote: > > > tail -f /var/log/messages | grep "local IP" > /home/pppusers/dynamic.IP > > > > > > it does nothing but create a 0 byte file. > > > > "tail -f" will run forever; output to the file won't be flushed until you've > > written a certain amount to the file -- one line obviously isn't enough. > > The screen on the other hand is flushed immediately. I suspect you don't > > really need the -f for tail, especially if you are just running this > > from the ip-up script or something. > > If I ran tail from the script without the -f, it would terminate > immediately. Since tail would terminate before the chat part of the > script has even finished, it would never see the string I'm looking for. > > Am I making any sense here?
I think you need to somehow ensure that tail isn't used until that line isn't written in the log; -f will get it to wait, but will never get you any output in the dynamic.IP file. Hamish -- Hamish Moffatt, [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] Latest Debian packages at ftp://ftp.rising.com.au/pub/hamish. PGP#EFA6B9D5 CCs of replies from mailing lists are welcome. http://hamish.home.ml.org -- Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] < /dev/null
