openwrt-packages-dist/utils/banhosts/files/updatebanhost

#!/bin/sh

file=/tmp/banhost

gethosts() {
	logger -t "banhost[$$]" "Update $file"
	wget -qO- http://winhelp2002.mvps.org/hosts.txt |awk 'BEGIN{printf "0.0.0.0"}/^0\.0\.0\.0/{printf " "$2}END{exit(!FNR)}' >$file || exit 1
	echo -n $time >$file.time
	exec killall -s HUP dnsmasq
}

if [ "$ACTION" = ifup -a "$INTERFACE" = wan ]; then
	read time </proc/uptime
	time=${time%%.*}

	[ -f $file -a -f $file.time ] || gethosts
	read oldtime <$file.time
	[ $((time - oldtime)) -lt 604800 ] || gethosts
fi