#!/bin/sh
#こんな感じです。
#エラー処理は考えてません。


parm_1=$1

access_count=0
total_count=0

new_ip=`/sbin/ifconfig eth1|awk '/inet/{print $1}'|cut -d":" -f2`
last_ip=$new_ip   

exe_func() {

    if [ "$parm_1" = --debug ];then

	echo "Debug mode running...,parm_1 is $parm_1"
	echo "Sleep 2 hours,access_count is $access_count"
	sleep 1s

    else

	sleep 2h

    fi

}   	

echo "start ddns.sh on `date`." >/root/ddns.log

while [ 1 ];do

    echo "`date`,access_count is $access_count.IP $new_ip" >>/root/ddns.log

    new_ip=`/sbin/ifconfig eth1|awk '/inet/{print $1}'|cut -d":" -f2`

    if [ $last_ip = $new_ip ];then

	exe_func

	access_count=$(($access_count+1))
    
	    if [ $(($access_count/13)) != 0 ];then
		 
		#下の*******は、パスワードです。
		wget -O - 'http://ddo.jp/dnsupdate.php?dn=karing&pw=*******' >/root/ddns.html 
		access_count=0
		total_count=$(($total_count+1))

		echo "Restart ddns.sh on `date`,total_count is $total_count.IP $new_ip" >/root/ddns.log  

	    fi

    else 

	echo "Updated the eth1 IP on `date`,new IP is $new_IP." >>/root/ddns.log
	
	#下の*******は、パスワードです。
	wget -O - 'http://ddo.jp/dnsupdate.php?dn=karing&pw=*******' > /root/ddns.html
	
	last_ip=$new_ip

	exe_func
	access_count=$(($access_count+1))

    fi

done