#!/bin/sh

PREREQ="md"

prereqs()
{
	echo "$PREREQ"
}

case $1 in
# get pre-requisites
prereqs)
	prereqs
	exit 0
	;;
esac

activate_vg()
{
	local vg="$1"

	# Make sure that we have a non-empty argument
	if [ -z "${vg}" ]; then
		return 0
	fi

	# Take care of lilo boot arg, risky activating of all vg
	vg_lilo=${vg:0:2}
	if [ "${vg_lilo}" = fe ]; then
		vgchange -ay
		exit 0
	fi

	# Make sure that we have a d-m path
	vg=${vg#/dev/mapper/}
	if [ "$vg" = "$1" ]; then
		return 0
	fi

	# Split volume group from logical volume.
	vg=$(echo ${vg} | sed -e 's#\(.*\)\([^-]\)-[^-].*#\1\2#')
	# Reduce padded --'s to -'s
	vg=$(echo ${vg} | sed -e 's#--#-#g')

	vgchange -ay ${vg}
}

if [ ! -e /sbin/vgchange ]; then
	exit 0
fi

modprobe -q dm-mod

activate_vg "$ROOT"
activate_vg "$resume"