#! /bin/sh
#----------------------------------------------------------------------------
# /etc/ppp/ip-up.ens - called whenever a (i)ppp connection
# over default circuit has been come up and ens is installed
#
# Creation:     22.08.2001  tb
# Last Update:  $Id$
#----------------------------------------------------------------------------
# modifying /usr/local/ens/ens.conf
# if provider supports sending ip(s) of dns server(s)
#----------------------------------------------------------------------------

if [ -f /var/run/$interface.usepeerdns ]            # $interface.usepeerdns existing?
then
    usepeerdns=`cat /var/run/$interface.usepeerdns` # set usepeerdns yes or no
else
    usepeerdns='no'                                 # set usepeerdns no
fi

if [ "$usepeerdns" = yes ]
then
    conf="/usr/local/ens/ens.conf"
    if [ "$DNS1" -o "$DNS2" ]                       # pppd sets DNS1 and DNS2 
    then
	cp -p $conf $conf.prev
	grep -v '^forwarder ' $conf > $conf.new
	echo "modifying $conf for dns server(s) of your provider:"
	echo -n "  servers:"
	for dns in $DNS1 $DNS2
	do
	    echo "forwarder $dns" >> $conf.new
	    echo -n " $dns"
	    domove=true
	done
	echo

	if [ "$domove" = "true" ]
	then
	    mv $conf.new $conf
	    chown ens:root $conf
	    killall -HUP ens
	fi
    else
	echo "your provider doesn't sent ip(s) for dns resolving."
	echo "not modifying $conf."
    fi
fi