#!/bin/bash

IFACE="$1"

[ -d /sys/class/net/$IFACE/ ] || exit 1

ID=$(readlink /sys/class/net/$IFACE/device | sed -e 's,.*/,,')
BUS=$(readlink /sys/class/net/$IFACE/device/bus | sed -e 's,.*/,,')

[ $BUS = "ccwgroup" ] && BUS=ccw

echo "$BUS-$ID"
