buildroot/package/webif/files/usr/lib/webif/apply.sh

#!/bin/ash
#
# Default handlers for config files
#
HANDLERS_config='
	wireless) reload_wireless;;
	network) reload_network;;
	system) reload_system;;
'
HANDLERS_file='
	hosts) rm -f /etc/hosts; mv $config /etc/hosts; killall -HUP dnsmasq ;;
	ethers) rm -f /etc/ethers; mv $config /etc/ethers; killall -HUP dnsmasq ;;
	firewall) mv /tmp/.webif/file-firewall /etc/config/firewall && /etc/init.d/S45firewall;;
'

# for some reason a for loop with "." doesn't work
eval "$(cat /usr/lib/webif/apply-*.sh 2>&-)"

reload_network() {
	echo '@TR<<Reloading>> @TR<<networking settings>> ...'
	grep '^wan_' config-network >&- 2>&- && {
		ifdown wan
		ifup wan
		killall -HUP dnsmasq
	}
	
	grep '^lan_' config-network >&- 2>&- && {
		ifdown lan
		ifup lan
		killall dnsmasq
		/etc/init.d/S??dnsmasq
	}
}

reload_wireless() {
	echo '@TR<<Reloading>> @TR<<wireless settings>> ...'
	killall nas >&- 2>&- && sleep 2
	(
		/sbin/wifi
		[ -f /etc/init.d/S41wpa ] && /etc/init.d/S41wpa
	) >&- 2>&- <&-
}

reload_system() {
	echo '@TR<<Applying>> @TR<<system settings>> ...'
	echo "$(nvram get wan_hostname)" > /proc/sys/kernel/hostname
}

cd /tmp/.webif

# file-* 		other config files
for config in $(ls file-* 2>&-); do
	name=${config#file-}
	echo "@TR<<Processing>> @TR<<config file>>: $name"
	eval 'case "$name" in
		'"$HANDLERS_file"'
	esac'
done

# config-*		simple config files
(
	cd /proc/self
	cat /tmp/.webif/config-* 2>&- | grep '=' >&- 2>&- && {
		cat /tmp/.webif/config-* 2>&- | tee fd/1 | xargs -n1 nvram set
		echo "@TR<<Committing>> NVRAM ..."
		nvram commit
	}
)
for config in $(ls config-* 2>&-); do 
	name=${config#config-}
	eval 'case "$name" in
		'"$HANDLERS_config"'
	esac'
done
sleep 2
rm -f config-*