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#!/usr/local/bin/bash |
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# Update |
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#!/bin/sh |
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# DHCP Client Exit Hooks |
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# |
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# Douglas Thrift |
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# |
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# $Id$ |
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read -e hostname interface name secret < ~/.update || exit $? |
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%%key%% |
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%%secret%% |
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%%hostname%% |
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old=`host $hostname | sed -Ee "s/^$hostname has address ([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})$/\1/p;d"` |
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address=`ifconfig $interface | sed -Ee 's/^ inet ([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}) netmask 0x[0-9a-f]{8} broadcast [0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/\1/p;d'` |
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|
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if [[ $old != $address ]]; then |
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nsupdate <<-EOF |
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key $name $secret |
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update delete $hostname A |
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update add $hostname 3600 A $address |
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send |
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EOF |
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fi |
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case $reason in |
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BOUND|RENEW|REBIND|REBOOT) |
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if [ "$old_ip_address" != "$new_ip_address" ]; then |
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nsupdate -d <<-EOF |
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key $key $secret |
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update delete $hostname A |
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update add $hostname 3600 A $new_ip_address |
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send |
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EOF |
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fi |
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;; |
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esac |
