#! /bin/bash
#
# /sbin/installkernel
#
# Copyright 2007-2008 Red Hat, Inc.  All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Author(s): tyson@rwii.com
#

usage()
{
	echo "Usage: $(basename $0) <kernel_version> <bootimage> <mapfile>" >&2
	exit 1
}

cfgLoader=

if [[ -z ${INSTALL_PATH} ]] || [[ ${INSTALL_PATH} = /boot ]]
then
	INSTALL_PATH=/boot
	cfgLoader=1
fi

LINK_PATH=/boot
RELATIVE_PATH=$(echo "${INSTALL_PATH}/" | sed "s|^${LINK_PATH}/||")
KERNEL_VERSION=$1
BOOTIMAGE=$2
MAPFILE=$3
ARCH=$(uname -m)
if [[ ${ARCH} = ppc64 ]] || [[ ${ARCH} = ppc ]]
then
	KERNEL_NAME=kernel
else
	KERNEL_NAME=kernel
fi

if [[ -z ${KERNEL_VERSION} ]] || [[ -z ${BOOTIMAGE} ]] || [[ -z ${MAPFILE} ]]
then
	usage
fi

if [[ -f ${INSTALL_PATH}/${KERNEL_NAME}-${KERNEL_VERSION} ]]
then 
	mv ${INSTALL_PATH}/${KERNEL_NAME}-${KERNEL_VERSION} \
		${INSTALL_PATH}/${KERNEL_NAME}-${KERNEL_VERSION}.old
fi

if [ ! -L ${INSTALL_PATH}/${KERNEL_NAME} ]
then
	if [ -e ${INSTALLPATH}/${KERNEL_NAME} ]
	then 
		mv ${INSTALL_PATH}/${KERNEL_NAME} ${INSTALL_PATH}/${KERNEL_NAME}.old
	fi
fi

if [ -f ${INSTALL_PATH}/System.map-${KERNEL_VERSION} ]
then 
	mv ${INSTALL_PATH}/System.map-${KERNEL_VERSION} \
		${INSTALL_PATH}/System.map-${KERNEL_VERSION}.old
fi

if [ ! -L ${INSTALL_PATH}/System.map ]
then
	if [ -e ${INSTALLPATH}/System.map ]
	then 
		mv ${INSTALL_PATH}/System.map ${INSTALL_PATH}/System.map.old
	fi
fi
ln -sf ${RELATIVE_PATH}${INSTALL_PATH}/System.map-${KERNEL_VERSION} ${LINK_PATH}/System.map

cat ${BOOTIMAGE} > ${INSTALL_PATH}/${KERNEL_NAME}-${KERNEL_VERSION}
cp ${MAPFILE} ${INSTALL_PATH}/System.map-${KERNEL_VERSION}

ln -fs ${RELATIVE_PATH}${INSTALL_PATH}/${KERNEL_NAME}-${KERNEL_VERSION} ${LINK_PATH}/${KERNEL_NAME}
ln -fs ${RELATIVE_PATH}${INSTALL_PATH}/System.map-${KERNEL_VERSION} ${LINK_PATH}/System.map

if [[ -n ${cfgLoader} ]] && [[ -x /sbin/new-kernel-pkg ]]
then
	/sbin/new-kernel-pkg --mkinitrd --depmod --install ${KERNEL_VERSION}
fi