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#!/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 [ ! "$2" ] ; then
	echo "Usage: $0 IFACE targetMAC"
	exit 1
fi
iface="$1"
targetmac=`echo "$2" | sed -e 'y/ABCDEF/abcdef/'`
mac=$(/sbin/ifconfig "$iface" | sed -n -e '/^.*HWaddr \([:[:xdigit:]]*\).*/{s//\1/;y/ABCDEF/abcdef/;p;q;}')

if [ "$targetmac" = "$mac" ]; then exit 0; else exit 1; fi