#!/bin/bash

LS=/bin/ls

if [ $# -ne 1 ]
then
	echo "$0: Missing arguments"
	echo "usage: $0 <bus>:<device>.<function>"
	exit 1
fi

bus_info=$1
pci_dev_dir="/sys/bus/pci/devices"
domain="0000"

interface=`${LS} $pci_dev_dir/$domain:$bus_info/ | grep net | sed 's/.*:\(.*\)/\1/'`

echo $interface
exit 0
