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#! /bin/sh
#
# /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 "$INSTALL_PATH" -o "$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' -o $ARCH = 'ppc' ]; then
    KERNEL_NAME=vmlinux
else
    KERNEL_NAME=vmlinuz
fi

if [ -z "$KERNEL_VERSION" -o -z "$BOOTIMAGE" -o -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 "$cfgLoader" ] && [ -x /sbin/new-kernel-pkg ]; then
	if [ -n "$(which dracut 2>/dev/null)" ]; then
		new-kernel-pkg --mkinitrd --dracut --host-only --depmod --install --kernel-name $KERNEL_NAME $KERNEL_VERSION
	else
		new-kernel-pkg --mkinitrd --depmod --install --kernel-name $KERNEL_NAME $KERNEL_VERSION
	fi
	new-kernel-pkg --rpmposttrans --kernel-name $KERNEL_NAME $KERNEL_VERSION
fi