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44 lines
645 B
Bash
Executable File
44 lines
645 B
Bash
Executable File
#!/bin/sh
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# Version @VERSION@
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set -e
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usage() {
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echo "$0 [-g |-d] <ip address>"
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echo " -g output the gateway for this ip address"
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exit 1
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}
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gflag=
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while getopts 'g' OPTION
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do
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case $OPTION in
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g) gflag=1
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;;
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?) usage
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exit 1
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;;
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esac
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done
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if [ "$gflag" != "1" ]
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then
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usage
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fi
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shift $(($OPTIND - 1))
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ipaddr=$1
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[ -z "$ipaddr" ] && usage
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device=$(ip addr | grep $1 | head -1 | awk '{print $NF}')
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defaultdev=$(ip route | grep default | awk '{print $NF}')
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if [ "$device" == "$defaultdev" ]
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then
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gateway=$(ip route | grep default | awk '{print $3}')
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fi
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[ -n "$gflag" ] && echo $gateway && exit 0
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