#!/bin/sh

ARP=arp
MACTODEV=mac-to-devinfo

IP=$1

if [ -z "$IP" ]; then
	echo "Must specify IP address"
fi

if [ ! -x "$(which $ARP)" ]; then
    do_arp() {
	cat /proc/net/arp
    }
    ARPMACFIELD=4
else
    do_arp() {
	$ARP -n
    }
    ARPMACFIELD=3
fi

ping -q -c 2 $IP >/dev/null
MAC=$(do_arp|grep "$IP "|tr -s \  | cut -f$ARPMACFIELD -d\  )

$MACTODEV $MAC