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#!/bin/bash
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#!/bin/bash
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# $Id: alcasar-watchdog.sh 958 2012-07-19 09:01:30Z franck $
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# $Id: alcasar-watchdog.sh 987 2012-08-17 21:41:28Z richard $
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# alcasar-watchdog.sh
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# alcasar-watchdog.sh
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# by Rexy
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# by Rexy
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# This script is distributed under the Gnu General Public License (GPL)
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# This script is distributed under the Gnu General Public License (GPL)
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# users are redirected on ALCASAR IP address if LAN Pb detected
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# users are redirected on ALCASAR IP address if LAN Pb detected
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{
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{
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	case $LAN_DOWN in
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	case $LAN_DOWN in
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	"1")
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	"1")
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		logger "eth0 link down"
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		logger "eth0 link down"
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		echo "eth0 is down"
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		/bin/sed -i "s?diagnostic =.*?diagnostic = \"eth0 link down\";?g" $Index_Page
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		/bin/sed -i "s?diagnostic =.*?diagnostic = \"eth0 link down\";?g" $Index_Page
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		;;
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		;;
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	"2")
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	"2")
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		logger "can't contact the default router"
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		logger "can't contact the default router"
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		echo "can't contact the default router"
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		/bin/sed -i "s?diagnostic =.*?diagnostic = \"can't contact the default router\";?g" $Index_Page
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		/bin/sed -i "s?diagnostic =.*?diagnostic = \"can't contact the default router\";?g" $Index_Page
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		;;
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		;;
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	esac
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	esac
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	net_pb=`cat /etc/dnsmasq.conf|grep "address=/#/"|wc -l`
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	net_pb=`cat /etc/dnsmasq.conf|grep "address=/#/"|wc -l`
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	if [ $net_pb = "0" ] # on alerte les usagers (si ce n'est pas déjà le cas).
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	if [ $net_pb = "0" ] # on alerte les usagers (si ce n'est pas déjà le cas).
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	if [ $LAN_DOWN != "0" ]
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	if [ $LAN_DOWN != "0" ]
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		then
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		then
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			lan_down_alert
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			lan_down_alert
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	# else switch in normal mode
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	# else switch in normal mode
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	else
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	else
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		echo "Internet access is OK for now"
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		net_pb=`cat /etc/dnsmasq.conf|grep "address=/#/"|wc -l`
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		net_pb=`cat /etc/dnsmasq.conf|grep "address=/#/"|wc -l`
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		if [ $net_pb != "0" ]
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		if [ $net_pb != "0" ]
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			then
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			then
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			/bin/sed -i "s?^\$network_pb.*?\$network_pb = False;?g" $Index_Page
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			/bin/sed -i "s?^\$network_pb.*?\$network_pb = False;?g" $Index_Page
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			/bin/sed -i "s?^address=\/#\/.*?conf-dir=/usr/local/etc/alcasar-dnsfilter-enabled?g" /etc/dnsmasq-blackhole.conf
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			/bin/sed -i "s?^address=\/#\/.*?conf-dir=/usr/local/etc/alcasar-dnsfilter-enabled?g" /etc/dnsmasq-blackhole.conf