#!/bin/bash
#
# 11-01 Pete Nesbitt
# script to check if eth0's IP has changed.
#
 
# already have a "emailnotice" alias in /etc/aliases
DATE=`date`
 
# set variables for email
EMAIL="linux1@telus.net petern@ola.bc.ca"
 
# a file to hold the previous IP
OLDIP="/usr/scripts/checkip/oldip"
 
# check for the current IP
CURRENT_IP="`/sbin/ifconfig -a|grep -A 2 eth0|awk '/inet/ { print $2 }'|sed -e s/addr://`"
 
# compare to new IP to last IP
if [ "`cat $OLDIP`" != "$CURRENT_IP" ]; then
  echo "The IP was reset at $DATE (ea 20 min.). The OLD IP was `cat $OLDIP`. The New IP is $CURRENT_IP. You must update yi.org and hostname."|mail -s "New IP Address" $EMAIL
 
# copy the new IP to the old IP
  echo "$CURRENT_IP" > $OLDIP
fi
 
exit