mkinitramfs

#!/bin/sh

# make sure we are being run in the right directory...
if [ -f mkinitramfs ]
then :
else
  echo >&2 mkinitramfs must be run from the mdadm source directory.
  exit 1
fi
if [ -f /bin/busybox ]
then : good, it exists
  case `file /bin/busybox` in
   *statically* ) : good ;;
   * ) echo >&2 mkinitramfs: /bin/busybox is not statically linked: cannot proceed.
       exit 1
  esac
else
  echo >&2 "mkinitramfs: /bin/busybox doesn't exist - please install it statically linked."
    exit 1
fi

rm -rf initramfs
mkdir initramfs
mkdir initramfs/bin
make mdadm.static
cp mdadm.static initramfs/bin/mdadm
cp /bin/busybox initramfs/bin/busybox
ln initramfs/bin/busybox initramfs/bin/sh
cat <<- END > initramfs/init
	#!/bin/sh

	echo 'Auto-assembling boot md array'
	mkdir /proc
	mount -t proc proc /proc
	if [ -n "$rootuuid" ]
	then arg=--uuid=$rootuuid
	elif [ -n "$mdminor" ]
	then arg=--super-minor=$mdminor
	else arg=--super-minor=0
	fi
	echo "Using $arg"
	mdadm -Acpartitions $arg --auto=part /dev/mda
	cd /
	mount /dev/mda1 /root ||  mount /dev/mda /root
	umount /proc
	cd /root
	exec chroot . /sbin/init < /dev/console > /dev/console 2>&1
END
chmod +x initramfs/init

(cd initramfs
 find init bin | cpio -o -H newc | gzip --best
) > init.cpio.gz
rm -rf initramfs
ls -l init.cpio.gz