#!/bin/sh

mountpoint=

if [ -n "$NFSROOT" ] ; then
	echo "You are already in nfsroot!" >&2
	exit 1
fi

for cmdline in `cat /proc/cmdline`
do
	case "$cmdline" in
	nfsroot=*)
		mountpoint=`echo "$cmdline" | cut -d = -f 2`
		;;
	esac
done

if [ -z "$mountpoint" ] ; then
	echo "None of nfsroot found in cmdline."
	exit 0
fi

if [ -z "`mount | grep "$mountpoint"`" ] ; then
	modprobe nfs
	mount -t nfs -o nolock $mountpoint /nfsroot
	mount -o bind /dev /nfsroot/dev
	mount -o bind /proc /nfsroot/proc
	mount -o bind /sys /nfsroot/sys
	
	mkdir -p /nfsroot/orig-rootfs
	mount -o bind / /nfsroot/orig-rootfs
fi

echo -n "Mount: "
mount | grep "$mountpoint "

chroot /nfsroot /usr/bin/env \
	NFSROOT=$mountpoint \
	HOME=/root \
	/bin/sh --login