mkramdisk

TARBALL=$1
RAMDISK=ramdisk
MOUNTPT=/tmp/ramdisk0
BLKSIZE=1M
RDSIZE=32
if [ "x$TARBALL" = "x" ]; then
	echo "Please specify a rootfs tarball to use"
	exit 1
fi
TARBALL_FULL=$(cd $(dirname $TARBALL); pwd)/$(basename $TARBALL)
if [ ! -e $TARBALL ]; then
	echo "Cannot find $TARBALL"
	exit 1
fi
#for tool in pushd popd mke2fs; do
for tool in mke2fs; do
	if ! type $tool >/dev/null 2>&1; then
		echo "ERROR: \"$tool\" not found."
		exit 2
	fi
done
echo "Using $TARBALL_FULL to create ramdisk"
mkdir -p $MOUNTPT
dd if=/dev/zero of=$RAMDISK bs=$BLKSIZE count=$RDSIZE
yes | mke2fs $RAMDISK
mount -t ext2 -o loop $RAMDISK $MOUNTPT
if [ ! -e $MOUNTPT/lost+found ]; then
	echo "Could not mount $RAMDISK at $MOUNTPT"
	exit 1
fi
tar xvj -C $MOUNTPT -f $TARBALL
umount $MOUNTPT
gzip $RAMDISK