#!/bin/sh
FILE=ipaddrs

echo Content-type: text/plain
echo

echo
echo
echo
echo
echo
echo Welcome to WWW.CS.CSUSTAN.EDU!
echo
echo


#
# See if the IP address of browser's computer appears in our file
#

if grep -s $REMOTE_ADDR $FILE >/dev/null 2>&1
then
 
   echo Hello host $REMOTE_ADDR!  We have spoken before.
   echo

else

#
# Append browser's address to the file
#

echo $REMOTE_ADDR >> $FILE

echo Pleased to meet you, host $REMOTE_ADDR!  
echo
echo "I don't believe we have met before."
echo

fi