#!/bin/sh

#
# Script to register/build/unregister a kernel module with DKMS.
#
# Copyright (C) 2010-2015 Oracle Corporation
#
# This file is part of VirtualBox Open Source Edition (OSE), as
# available from http://www.virtualbox.org. This file is free software;
# you can redistribute it and/or modify it under the terms of the GNU
# General Public License (GPL) as published by the Free Software
# Foundation, in version 2 as it comes in the "COPYING" file of the
# VirtualBox OSE distribution. VirtualBox OSE is distributed in the
# hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
#

ACTION=
if [ "$1" = "install" ]; then
  ACTION="install"
  MODULE="$2"
  VERSION="$3"
elif [ "$1" = "uninstall" ]; then
  shift
  ACTION="uninstall"
  OLDMODULES="$*"
  break
fi

DKMS=`which dkms 2>/dev/null`
if [ -n "$DKMS" ]
then
    if [ "$ACTION" = "uninstall" ]; then

        echo "Uninstalling modules from DKMS"
        for m in $OLDMODULES
        do
            $DKMS status -m $m | while read line
            # first, remove _any_ old module
            do
                if echo "$line" | grep -q added > /dev/null ||
                   echo "$line" | grep -q built > /dev/null ||
                   echo "$line" | grep -q installed > /dev/null; then
                    # either 'vboxvideo, <version>: added' 
                    # or 'vboxvideo, <version>, ...: installed'
                    version=`echo "$line" | sed "s/$m,\([^,]*\)[,:].*/\1/;t;d"`
                    echo "  removing old DKMS module $m version $version"
                    $DKMS remove -m $m -v $version --all
                fi
            done
        done
        exit 0

    elif [ "$ACTION" = "install" ]; then

        echo "Attempting to install using DKMS"
        if $DKMS add -m $MODULE -v $VERSION &&
            $DKMS build -m $MODULE -v $VERSION &&
            $DKMS install -m $MODULE -v $VERSION --force
        then
            exit 0
        fi
        echo "Failed to install using DKMS, attempting to install without"

    fi
fi

exit 1
