if uci -q get fstab.overlay > /dev/null \
&& [ ! -e /etc/extroot-restore ] \
&& lock -n /var/lock/extroot-restore \
&& [ -e /etc/opkg-restore-init ]
then
UUID="$(uci -q get fstab.overlay.uuid)"
OVRL="$(block info | sed -n -e "/${UUID}/s/:.*$//p")"
mount "${OVRL}" /mnt
BAK="$(mktemp -d -p /mnt -t bak.XXXXXX)"
mv -f /mnt/etc /mnt/upper "${BAK}"
touch /etc/extroot-restore
if grep -q -e "\s/overlay\s" /etc/mtab
then cp -f -a /overlay/. /mnt
fi
umount "${OVRL}"
lock -u /var/lock/extroot-restore
reboot
fi
exit 1