firmware/general/overlay/etc/network/if-post-down.d/bridge

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#!/bin/sh
# Configuration of the bridge should be done in /etc/network/interfaces.d/bridgeX
# Read more at https://wiki.debian.org/BridgeNetworkConnections
[ ! -x /usr/sbin/brctl ] && exit 0
case "$IF_BRIDGE_PORTS" in
"")
exit 0
;;
none)
INTERFACES=""
;;
all)
INTERFACES=$(grep eth /proc/net/dev|sed 's/\(\ *\)\(eth[^:]*\)\(.*\)/\2/')
;;
*)
INTERFACES="$IF_BRIDGE_PORTS"
;;
esac
brctl delbr $IFACE
for i in $INTERFACES; do
ip link set $i down
done