a simple script to prevent bricking for openwrt

root@OpenWrt:~# cat /etc/init.d/unbrick 
#!/bin/sh /etc/rc.common
 
START=20
 
bakcat() {
	for i in $* ; do
		echo "################file seperator for $i##################"
		cat $i
		echo
	done
}
 
revert() {
	echo revert config...
	bakcat /etc/config/* >/root/cfgbak.all 2>&1
	cp -R /root/cfgbak/* /etc/config/
}
 
start() {
	count=$(cat /root/count_file)
	if [ $count -eq 0 ] ; then
		revert
	fi
	count=$((count-1))
	echo $count > /root/count_file
}
 
root@OpenWrt:~# /etc/init.d/unbrick enable
root@OpenWrt:~# echo 3 >  /root/count_file 
root@OpenWrt:~# mkdir /root/cfgbak