init

#!/bin/busybox sh

NEWROOT=/.newroot
INITRAMFS=/run/initramfs
MEDIA=$INITRAMFS/media
LOWER=$INITRAMFS/lower
UPPER=$INITRAMFS/upper
WORK=$INITRAMFS/work
SFSIMAGE=$MEDIA/boot/rootfs.sfs

/bin/busybox --install -s /bin

mkdir -p /proc /sys /run /dev
mount -t proc proc /proc
mount -t sysfs sysfs /sys
mount -t tmpfs run /run
mount -t devtmpfs dev /dev

read -r cmdline < /proc/cmdline

for cmd in $cmdline; do
	case $cmd in
		shell) SHELL=1;;
		ram) RAM=1;;
	esac
done

mkdir -p $LOWER $MEDIA $UPPER $WORK $NEWROOT

exec >/dev/console </dev/console 2>&1

PRINTK="`cat /proc/sys/kernel/printk`"
echo "0" > /proc/sys/kernel/printk

# load all kernel modules
depmod
find /lib/modules/$(uname -r)/ -type f -name '*.ko*' \
| rev | awk -F / '{print $1}' | rev | awk -F \. '{print $1}' \
| xargs modprobe -b -a 2>/dev/null

# run mdev
mdev -s
echo "/bin/mdev" > /proc/sys/kernel/hotplug

if [ "$SHELL" ]; then
	echo "shell requested"
	echo "exit to continue booting"
	sh
fi

# figure out media
# cdrom drive
modprobe loop
if [ -f /proc/sys/dev/cdrom/info ]; then
	CDROM=$(grep name /proc/sys/dev/cdrom/info | awk -F : '{print $2}' | awk '{print $1}')
fi
BLOCK=$(grep -E '[vsh]d' /proc/partitions | awk '{print $4}')
for i in $CDROM $BLOCK; do
	mount -r /dev/$i $MEDIA
	if [ $? = 0 ] ;then
		if [ -f $MEDIA/livemedia ]; then
			MEDIAFOUND=1
			break
		else
			umount $MEDIA
		fi
	fi
done

if [ ! "$MEDIAFOUND" ]; then
	echo "Media not found"
	sh
	echo "Cannot go further"
	sleep 99999
	exit 1
fi

if [ "$RAM" ]; then
	echo "Boot in ram requested"
	mkdir -p $INITRAMFS/ram
	mount -t tmpfs -o "size=75%",mode=0755 ram $INITRAMFS/ram
	cp -r $MEDIA/* $INITRAMFS/ram/
	SFSIMAGE=$INITRAMFS/ram/boot/rootfs.sfs
fi

# mount stuffs
loopdevice=$(losetup -f)
losetup -f $SFSIMAGE
mount -r $loopdevice $LOWER
mount -t overlay overlay -o lowerdir=$LOWER,upperdir=$UPPER,workdir=$WORK $NEWROOT

# copy over any customization into $NEWROOT
if [ -d $MEDIA/rootfs ]; then
	cp -ra $MEDIA/rootfs/* $NEWROOT
fi

if [ "$RAM" ]; then
	umount $MEDIA
fi

mount --move /sys $NEWROOT/sys
mount --move /proc $NEWROOT/proc
mount --move /dev $NEWROOT/dev
mount --move /run $NEWROOT/run

# execute live script if exist
if [ -f $NEWROOT/root/live_script.sh ]; then
	chroot $NEWROOT sh /root/live_script.sh
fi

# switch to newroot
clear
exec /bin/switch_root $NEWROOT /sbin/init

echo "This is the end of initramfs"
echo "Nothing further, here's the shell"
/bin/busybox sh