#!/bin/sh
#----------------------------------------------------------------------------
# /etc/ppp/ip-down800.dhcp                                       __FLI4LVER__
#
# called whenever an IPv4 PPP connection over default circuit has been shut
# down and dnsmasq is installed
#
# Creation:     2007-11-29  lanspezi
# Last Update:  $Id$
#----------------------------------------------------------------------------
# restore etc/resolv.dnsmasq from etc/resolv.dnsmasq.bak
#----------------------------------------------------------------------------

. /etc/rc.d/helper-dns_dnsmasq.sh

resolv_file=/etc/resolv.dnsmasq
delegation_file=/etc/dnsmasq.d/dns_delegation.conf
bogus_priv_file=$dns_private_subnets

# is a default-route-interface going down?
if [ "$is_default_route" = "yes" ]
then
    if lock_resource $(basename $resolv_file) ip-down800.dns
    then
        restart=no
        # does /etc/resolv.dnsmasq.bak exist?
        if [ -f $resolv_file.bak ]
        then
            # yes, restore etc/resolv.dnsmasq
            mv $resolv_file.bak $resolv_file
            echo "$resolv_file restored."
        fi
        if [ -f $delegation_file~ ]
        then
            mv $delegation_file~ $delegation_file
            chown dns:dns $delegation_file
            echo "$delegation_file restored."
            restart=yes
        fi
        if [ -f $bogus_priv_file~ ]
        then
            mv $bogus_priv_file~ $bogus_priv_file
            dns_update_private_subnets
            echo "$bogus_priv_file restored."
            restart=yes
        fi
        if [ "$restart" = yes ]
        then
            killall dnsmasq
            sleep 1
            dnsmasq
        else
            killall -HUP dnsmasq
        fi
        unlock_resource $(basename $resolv_file) ip-down800.dns
    fi
fi