#!/bin/sh
#
# Checks if the given interface matches the given ethernet MAC.
# If it does it exits with 0 (success) status;
# if it doesn't then it exists with 1 (error) status.
set -e
export LANG=C
if [ ! "$1" -o ! "$2" ]; then
echo "Usage: $0 IFACE targetMAC"
exit 1
fi
/sbin/ip -brief link show dev "$1" | read iface state mac rest
targetmac=`echo "$2" | tr A-F a-f`
test "$targetmac" = "$mac"