openwrtv4/openwrt/package/base-files/default/sbin/ifdown

#!/bin/sh
[ $# = 0 ] && { echo "  $0 <group>"; exit; }
. /etc/functions.sh
. /etc/network.overrides
[ "$FAILSAFE" != "true" -a -e /etc/config/network ] && . /etc/config/network

debug "### ifdown $type ###"
type=$1

if_proto=$(nvram get ${type}_proto)
if=$(nvram get ${type}_ifname)

case "$if_proto" in
	pppoa) hotplug_dev unregister atm0; exit 0 ;;
	pppoe) 
		[ "$(nvram get pppoe_atm)" = 1 ] && {
			hotplug_dev unregister atm0
			exit
		}
	;;
esac

if [ "${if%%[0-9]}" = "br" ]; then
	for sif in $(nvram get ${type}_ifnames); do
		hotplug_dev unregister "$sif"
	done
fi
	
hotplug_dev unregister "$if"