virt-addr

#!/bin/sh

ARGS=$(getopt -o mn:i: --long macaddr,network:,index: -n virt-addr -- "$@")

if [ $? -ne 0 ]; then
	echo "usage: $0: [--network <network>] [--index <index>] <name>" >&2
	exit 2
fi

eval set -- "$ARGS"

while :; do
	case "$1" in
		-n|--network)
			LIBVIRT_NETWORK=$2
			shift 2
			;;

		-i|--index)
			INTERFACE_INDEX=$2
			shift 2
			;;
		-m|--macaddr)
			ONLY_MACADDR=1
			shift
			;;
		-l|--lease-file)
			LIBVIRT_LEASE_FILE=$2
			shift 2
			;;
		--)	shift
			break
			;;

		-*)	echo "ERROR: unimplemented option: $1" >&2
			exit 2
			;;
	esac
done

: ${LIBVIRT_NETWORK:=default}
: ${LIBVIRT_LEASE_FILE:=/var/lib/libvirt/dnsmasq/${LIBVIRT_NETWORK}.leases}
: ${INTERFACE_INDEX:=1}

dom_name=$1
shift

macaddr=$(virsh dumpxml $dom_name | 
	xmllint --xpath "string((//interface/mac/@address)[${INTERFACE_INDEX}])" -)

if [ "$ONLY_MACADDR" = 1 ]; then
	echo $macaddr
	exit
fi

awk -vmacaddress=$macaddr '$2 == macaddress {print $3}' $LIBVIRT_LEASE_FILE