#!/bin/ash
export PATH="/bin:/sbin:/usr/bin:/usr/sbin"
KERNVER="`uname -r`"
FILES=`echo /* | sed 's@/mnt @ @'`
if [ -n "$AUFS" ]; then
    if [ -z "$INIT_TMPFS" ]; then
	mount -t tmpfs none /mnt
	cd /mnt
	cp -a $FILES .
	mkdir mnt
	export INIT_TMPFS=1
	exec switch_root . /init
    fi
fi

mount -t proc none /proc
ROOTFLAG="ro"
INIT="/sbin/init"
for p in `cat /proc/cmdline`; do
    v=`echo $p | sed 's/[^=]*=//'`
    case $p in
	root=*)
	    ROOT=$v
	    ;;
	rootfstype=*)
	    ROOTPARM="-t $v"
	    ;;
	rootflags=*)
	    ROOTFLAG=$v
	    ;;
	nfsroot=*)
	    NFSROOT=`echo $v | sed 's/,.*//'`
	    NFSOPTS=`echo $v | sed 's/[^,]*,*//'`
	    NFSPARM='-t nfs'
	    if [ -n "$NFSOPTS" ]; then
		NFSPARM="$NFSPARM -o $NFSOPTS"
		unset NFSOPTS
	    fi
	    ;;
	init=*)
	    INIT=$v
	    ;;
	[0-6S])
	    RUNLEVEL=$p
	    ;;
    esac
done
unset p v
ROOTPARM="$ROOTPARM -o $ROOTFLAG"
unset ROOTFLAG
if [ -n "$RUNLEVEL" ]; then
    INIT="$INIT $RUNLEVEL"
fi
hwclock --hctosys

mount -t sysfs none /sys
tmp=/tmp/dev2mod
echo 'dev2mod(){ while read dev; do case $dev in' > $tmp
sort -r /lib/modules/$KERNVER/modules.alias \
| sed -n 's/^alias  *\([^ ]*\)  *\(.*\)/\1)modprobe \2;;/p' >> $tmp
echo 'esac; done; }' >> $tmp
. $tmp
rm $tmp
unset tmp
cat /sys/bus/*/devices/*/modalias | dev2mod
modprobe pcmcia
cat /sys/bus/*/devices/*/modalias | dev2mod
umount /sys
modprobe af_packet
modprobe unix
modprobe ext3
modprobe xfs

if [ -z "$NIC_DEV" ]; then
    NIC_DEV=eth0
fi
if [ -n "$NFSROOT" ]; then
    ifconfig lo 127.0.0.1
    if ifconfig $NIC_DEV; then
	ifconfig $NIC_DEV up
	sleep 3
	udhcpc --retries=2 -i $NIC_DEV
	mount -t nfs $NFSPARM $NFSROOT /mnt
    fi
elif [ -n "$ROOT" ]; then
    mount $ROOTPARM $ROOT /mnt
fi

if [ -n "$INIT_DEBUG" ]; then
    set
    exec /bin/sh
fi

umount /proc
if [ -n "$AUFS" ]; then
    case $AUFS in
	/*)
	    mnt="/mnt$AUFS"
	    ;;
	*)
	    mnt="/mnt"
	    ;;
    esac
    mkdir /.rw /.root
    mount -t aufs -o br:/.rw:${mnt}=ro none /.root
    unset mnt
    cd /.root
    if [ -n "$INIT_TMPFS" ]; then
	test -d initrd || mkdir initrd
	pivot_root . initrd
	initrd/bin/busybox rm -rf `echo $FILES /.root | sed 's@/@initrd/@g'`
	exec $INIT
    else
	cp -a /bin/busybox .
	rm -rf $FILES
	./busybox mount --move . /
	exec ./busybox chroot . /bin/sh -c "rm ./busybox; exec $INIT"
    fi
fi
exec switch_root /mnt $INIT