Re: 'watching' a file

[miquels@cistron.nl (Miquel van Smoorenburg)]

In article <[🔎] Pine.LNX.3.96.980304180328.23193A-100000@serv1.3dillusion.com>,
Paul Miller <paul@3dillusion.com> wrote:
>
>How can you 'watch' a file as it is being written to?  For example, I want
>to have a script watch a log files for certain information and do
>something when it sees the information.

Ah, basic shell programming question :)

Something like:

---------------------------------

#! /bin/sh

tail -f /var/log/messages | (
  while read line
  do
	case "$line" in
		*emergency*)
			echo "EMERGENCY: $line" > /dev/console
			;;
		*"ippp0: dialing"*)
			echo "DIALING: $line" > /dev/console
			;;
	esac
  done
)
---------------------------------

Well, you get the idea ..

Mike.
-- 
 Miquel van Smoorenburg |  
    miquels@cistron.nl  |  Luck is when preparation meets opportunity


--
TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to
debian-user-request@lists.debian.org . 
Trouble?  e-mail to templin@bucknell.edu .