#!/bin/sh
#
# exec by root
#
PATH=/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin
export PATH
#
basedir=/provider/catv
#
device=eth0
server=catv.provider.ne.jp
interval=5m
mmdd=""
#
while [ x = x ]
do
    result=`ping -c 1 ${server} 2>&1 | grep "1 packets received"`
#
    if [ "X${result}" = "X" ]
    then
        kill -TERM `cat /var/run/dhcpcd-${device}.pid`
        sleep 2
#
# option : -R は dhcpcd による /erc/resolv.conf の書き換えを
#          抑止する。自前で BIND を立てる都合上このようにした。
#
        /sbin/dhcpcd -R ${device} >/dev/null 2>&1
    fi
#
    new_mmdd=`date +%m%d`
    if [ "X${mmdd}" != "X${new_mmdd}" ]
    then
        ${basedir}/etc/timeadjst.sh
        mmdd=${new_mmdd}
    fi
#
    sleep ${interval}
done