firmware/general/overlay/etc/network/if-pre-up.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 addbr $IFACE &&
for i in $INTERFACES; do
[ -x /etc/network/if-pre-up.d/vlan ] && env IFACE=$i /etc/network/if-pre-up.d/vlan
brctl addif $IFACE $i && ip link set dev $i up
done
brctl stp $IFACE off