Automatic updating of /etc/hosts file?

From: Rejected (rejected_at_hotmail.com)
Date: 11/06/04 

Date: 5 Nov 2004 20:26:45 -0800

Here is my dilemia: I have an RS6000 that has IP printers defined to
dynamic DNS addresses. The spooler won't do DNS lookups, so I have to
set the /etc/hosts file to have the DNS entries. To the user login
script I added

export CLIENTIP=`who am i | sed -e 's/^.*(//' -e 's/)//'`

This will set the unix environment variable of CLIENTIP each time a
user logs in. I then want to take this script (dyndns.sh) to update
the /etc/hosts file

#! /bin/ksh
IP=$CLIENTIP
ME=`whoami`rps

if [ "$IP" ]; then
  sed '/^--$ME--/,/^--$ME--/'d /etc/hosts > /etc/hosts
  echo "--$ME--\n$IP $ME.homelinux.com\n--$ME--" >>/etc/hosts
fi

This would get tricky if multiple users login at the same time, so I
prefer not to create a new file, "> /etc/hosts" (like I'm currently
testing), but edit the existing file on the file.

I'm open to any and all solutions. Please help. Thanks.

Rejected at Hotmail dot com

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