#!/bin/sh
overlay_files()
{
	if [ ! -f /mnt/overlay_rw0/rootfs/.fileexisted ]; then
		mkdir /mnt/overlay_rw0/rootfs
		cp -arf /etc /mnt/overlay_rw0/rootfs
		cp -arf /var /mnt/overlay_rw0/rootfs
		sync
		mkdir /mnt/overlay_rw0/rootfs/lib
		cp -arf /lib/modules /mnt/overlay_rw0/rootfs/lib/modules
		sync;
		touch /mnt/overlay_rw0/rootfs/.fileexisted
		sync;
	fi
	mount /mnt/overlay_rw0/rootfs/etc /etc
	mount /mnt/overlay_rw0/rootfs/var /var
	mount /mnt/overlay_rw0/rootfs/lib/modules /lib/modules
}

wait_dev_or_exit()
{
	x=0
	timeout=5
	while [ "$x" -lt "$timeout" -a ! -e $1 ]; do
		x=$((x+1))
		sleep .1
	done
	if [ "$x" -ge "$timeout" ]; then
		echo "[app mount] $1 not found"
		exit -1
	fi
}

echo "/sbin/mdev" > /proc/sys/kernel/hotplug
mdev -s
exit 0
# if /proc/mtd not exist, exit
if [ ! -f /proc/mtd ]; then
	echo "[fs overlay] /proc/mtd not ready"
	exit -1
fi

# if the partition not found, exit
num=`cat /proc/mtd | grep \"rootfs1\" | awk -F' ' '{print $1}' | tr -d 'mtd' | tr -d ':'`;
if [ -z "$num" ]; then
	echo "[fs overlay] no rootfs1 partition"
	exit 0
fi

if [ "$NVT_ROOTFS_TYPE" == "NVT_ROOTFS_TYPE_NAND_UBI" ]; then
	echo "[fs overlay] ubi mount rootfs1"
	ubiattach /dev/ubi_ctrl -m $num
	wait_dev_or_exit /dev/ubi1_0
	mount -t ubifs /dev/ubi1_0 /mnt/overlay_rw0;
	overlay_files;
	sync
	echo 1 > /proc/sys/vm/drop_caches
elif [ "$NVT_ROOTFS_TYPE" == "NVT_ROOTFS_TYPE_NAND_SQUASH" ]; then
	echo "[fs overlay] squash mount rootfs1"
	ubiattach /dev/ubi_ctrl -m $num
	wait_dev_or_exit /dev/ubi1_0
	mount -t ubifs /dev/ubi1_0 /lib/modules;
	mount /lib/modules/usr/bin/ /usr/bin/;
	mount /lib/modules/usr/lib/ /usr/lib/;
elif [ "$NVT_ROOTFS_TYPE" == "NVT_ROOTFS_TYPE_RAMDISK" ] && [ "$EMBMEM" != "EMBMEM_NONE" ]; then
	echo "[fs overlay] ramdisk mount rootfs1"
	ubiattach /dev/ubi_ctrl -m $num
	wait_dev_or_exit /dev/ubi0_0
	mount -t ubifs /dev/ubi0_0 /lib/modules;
	mount /lib/modules/usr/bin/ /usr/bin/;
	mount /lib/modules/usr/lib/ /usr/lib/;
elif [ "$NVT_ROOTFS_TYPE" == "NVT_ROOTFS_TYPE_RAMDISK" ] && [ "$EMBMEM" == "EMBMEM_NONE" ]; then
	echo "[fs overlay] No overlay"
else
	echo "[fs overlay] jffs2 mount rootfs1"
	mount -t jffs2 /dev/mtdblock$num /mnt/overlay_rw0
	overlay_files;
fi