| #!/bin/sh |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| |
| set -e |
| |
| usage() { |
| echo "$0 [-g |-d] <ip address>" |
| echo " -g output the gateway for this ip address" |
| exit 1 |
| } |
| |
| gflag= |
| |
| while getopts 'g' OPTION |
| do |
| case $OPTION in |
| g) gflag=1 |
| ;; |
| ?) usage |
| exit 1 |
| ;; |
| esac |
| done |
| |
| if [ "$gflag" != "1" ] |
| then |
| usage |
| fi |
| |
| shift $(($OPTIND - 1)) |
| ipaddr=$1 |
| |
| [ -z "$ipaddr" ] && usage |
| |
| device=$(ip addr | grep $1 | head -1 | awk '{print $NF}') |
| defaultdev=$(ip route | grep default | awk '{print $NF}') |
| if [ "$device" == "$defaultdev" ] |
| then |
| gateway=$(ip route | grep default | awk '{print $3}') |
| fi |
| |
| [ -n "$gflag" ] && echo $gateway && exit 0 |