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#!/bin/bash
#
# new-kernel-pkg
# Invoked upon installation or removal of a kernel package, the following
# tasks are/can be done here:
# creation/removal of initrd
# run of depmod/removal of depmod generated files
# addition/removal of kernel images from grub/lilo configuration (via grubby)
#
# Copyright 2002-2008 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/>.
#

PATH=/sbin:/bin:$PATH

lilo=/sbin/lilo

# some defaults that are sane for most arches
kernelName=vmlinuz

if [ -x ./grubby ]; then
    grubby=./grubby
else
    grubby=/sbin/grubby
fi

[ -f /etc/sysconfig/kernel ] && . /etc/sysconfig/kernel
[ -f /etc/sysconfig/uboot ] && . /etc/sysconfig/uboot

cfgGrub2=""
cfgGrub2Efi=""
cfgGrub=""
cfgLilo=""
cfgExtlinux=""
cfguBoot=""
runLilo=""
grubConfig=""
grub2Config=""
grub2EfiConfig=""
extlinuxConfig=""
ubootScript="/boot/boot.scr"

ARCH=$(uname -m)

if [ $ARCH = 'ia64' ]; then
    liloConfig=/boot/efi/EFI/redhat/elilo.conf
    bootPrefix=/boot/efi/EFI/redhat
    liloFlag=elilo
    isx86=""
elif [ $ARCH = 'ppc64' -o $ARCH = 'ppc' ]; then
    liloConfig=/etc/yaboot.conf
    grub2Config=$(readlink -f /etc/grub2.cfg 2>/dev/null)
    bootPrefix=/boot
    lilo=/sbin/ybin
    liloFlag=yaboot
    runLilo="yes"
    isx86=""
elif [ $ARCH = 'sparc' -o $ARCH = 'sparc64' ]; then
    liloConfig=/etc/silo.conf
    bootPrefix=/boot
    liloFlag=silo
    lilo=/sbin/silo
    isx86=""
elif [ $ARCH = 's390' -o $ARCH = 's390x' ]; then
    liloConfig=/etc/zipl.conf
    bootPrefix=/boot
    liloFlag=zipl
    lilo=/sbin/zipl
    runLilo="yes"
    isx86=""
elif [[ ${ARCH} =~ armv[5|7].*l ]] ; then
    liloConfig=""
    bootPrefix=/boot
    extlinuxConfig=$(readlink -f /etc/extlinux.conf 2>/dev/null)
    ubootDir=${UBOOT_DIR:-"/boot"}
    ubootScript=$ubootDir/${UBOOT_SCR:-"boot.scr"}
    ubootKList=${UBOOT_KLIST:-"klist.txt"}
    ubootDevice=/dev/${UBOOT_DEVICE:-"mmcblk0p1"}
    ubootDefaultImage=${UBOOT_UIMAGE:-"uImage"}
    ubootDefaultInitrd=${UBOOT_UINITRD:-"uInitrd"}
    ubootAddress=${UBOOT_IMGADDR:-"0x00008000"}
    mounted=""
    liloFlag=""
    isx86=""
else
    # this leaves i?86 and x86_64
    liloConfig=/etc/lilo.conf
    grubConfig=$(readlink -f /etc/grub.conf 2>/dev/null)
    grub2Config=$(readlink -f /etc/grub2.cfg 2>/dev/null)
    grub2EfiConfig=$(readlink -f /etc/grub2-efi.cfg 2>/dev/null)
    extlinuxConfig=$(readlink -f /etc/extlinux.conf 2>/dev/null)
    bootPrefix=/boot
    liloFlag=lilo
    isx86="yes"
fi

mode=""
version=""
initrd=""
dracut=""
dracuthostonly=""
initrdfile=""
devtreefile=""
moddep=""
verbose=""
makedefault=""
package=""
mbkernel="$HYPERVISOR"
mbargs="$HYPERVISOR_ARGS"
adddracutargs=""
addplymouthinitrd=""
DEBUGARG="systemd.log_level=debug systemd.log_target=kmsg"

usage() {
    echo "Usage: `basename $0` [-v] [--mkinitrd] [--rminitrd] [--dracut]" >&2
    echo "       [--initrdfile=<initrd-image>] [--depmod] [--rmmoddep]" >&2
    echo "       [--kernel-args=<args>] [--remove-args=<args>]" >&2
    echo "       [--banner=<banner>] [--multiboot=multiboot]" >&2
    echo "       [--mbargs=mbargs] [--make-default] [--add-dracut-args]" >&2
    echo "       [--add-plymouth-initrd]" >&2
    echo "       [--host-only] [--devtree=<devicetree.dtb>]" >&2
    echo "       <--install | --remove | --update | --rpmposttrans> <kernel-version>" >&2
    echo "       (ex: `basename $0` --mkinitrd --depmod --install 2.4.7-2)" >&2
    exit 1
}

rungrubby() {
	if [ "$1" == "--debug" ]; then
		[ "$MAKEDEBUG" != "yes" ] && return 0
		[ -n "$verbose" ] && echo "- First, making a debug entry."
		if [ $ARCH = 's390' -o $ARCH = 's390x' ]; then
			declare -x debugtitle="_with_debugging"
		else
			declare -x debugtitle=" with debugging"
		fi
		declare -x debugargs="$DEBUGARG"
		shift
	else
		[ -n "$verbose" ] && echo "- Making a normal entry."
	fi
	$(eval $grubby $@)
	export -n debugargs
	export -n debugtitle
	unset debugargs
	unset debugtitle
}

set_title() {
    if [ -n "$banner" ]; then
	if [ $ARCH = 's390' -o $ARCH = 's390x' ]; then
	    title=$(echo $banner | sed 's/ /_/g')
	else
	    title="$banner ($version)"
	fi
    elif [ $ARCH = 's390' -o $ARCH = 's390x' ]; then
	title=$(echo $version | sed 's/ /_/g')
    elif [ -f /etc/os-release ]; then
	. /etc/os-release
	title="$NAME ($version) $VERSION"
    elif [ -f /etc/redhat-release ]; then
	title="$(sed 's/ release.*$//' < /etc/redhat-release) ($version)"
    else
	title="Red Hat Linux ($version)"
    fi
}

install() {
    # XXX kernel should be able to be specified also (or work right on ia64)
    if [ ! -f $kernelImage ] ; then
	[ -n "$verbose" ] && echo "kernel for $version does not exist, not running grubby"
	return
    fi

    INITRD=""
    if [ -f $initrdfile ]; then
	[ -n "$verbose" ] && echo "found $initrdfile and using it with grubby"
	INITRD="--initrd $initrdfile"

	if [ -n "$addplymouthinitrd" ]; then
	    INITRD="$INITRD --extra-initrd $bootPrefix/initrd-plymouth.img"
	fi
    fi

    DEVTREE=""
    if [ "x$devtreefile" != "x" -a -f "$devtreefile" ]; then
	[ -n "$verbose" ] && echo "found $devtreefile and using it with grubby"
	DEVTREE="--devtree $devtreefile"
    fi

    # FIXME: is this a good heuristic to find out if we're on iSeries?
    if [ -d /proc/iSeries ]; then
	[ -n "$verbose" ] && echo "On an iSeries, just making img file"
	if [ -z $initrdfile  ]; then
	    [ -n "$verbose" ] && echo "No initrd, just adding system map"
	    /sbin/addSystemMap $bootPrefix/System.map-$version $kernelImage $bootPrefix/vmlinitrd-$version
	else
	    /sbin/addSystemMap $bootPrefix/System.map-$version $kernelImage $bootPrefix/vmlinux.sm-$version
	    /sbin/addRamDisk $initrdfile $bootPrefix/System.map-$version $bootPrefix/vmlinux.sm-$version $bootPrefix/vmlinitrd-$version 2>/dev/null
	    rm $bootPrefix/vmlinux.sm-$version
	fi
	return
    fi

    # get the root filesystem to use
    rootdevice=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $1; }}' /etc/fstab 2>/dev/null)
    if [ "$rootdevice" = "" ];
    then
	    rootdevice=`grep -o -P "(?<=root=)\S+" /proc/cmdline`
    fi

    if [ -n "$mbkernel" -a -n "$cfgLilo" -a "$liloFlag" != "elilo" ]; then
	[ -n "$verbose" ] && echo "multiboot specified, not updating lilo.conf"
	cfgLilo=""
    fi

    set_title

    if [ -n "$cfgGrub" ]; then
	[ -n "$verbose" ] && echo "adding $version to $grubConfig"

	ARGS="--grub -c $grubConfig --add-kernel=$kernelImage $INITRD \
		${mbkernel:+--add-multiboot=\"$mbkernel\"} \
		${mbargs:+--mbargs=\"$mbargs\"} \
		--title=\"$title\$debugtitle\" --copy-default \
		--args=\"root=$rootdevice $kernargs \$debugargs\" \
		--remove-kernel=\"TITLE=$title\$debugtitle\""

	rungrubby ${ARGS} $makedefault
	rungrubby --debug ${ARGS} --set-index=1
    else
	[ -n "$verbose" ] && echo "$grubConfig does not exist, not running grubby for grub 0.97"
    fi
    if [ -n "$cfgGrub2" ]; then
	[ -n "$verbose" ] && echo "adding $version to $grub2Config"

	ARGS="--grub2 -c $grub2Config --add-kernel=$kernelImage $INITRD \
		--copy-default --title \"$title\$debugtitle\" \
		${mbkernel:+--add-multiboot=\"$mbkernel\"} \
		${mbargs:+--mbargs=\"$mbargs\"} \
		--args=\"root=$rootdevice $kernargs \$debugargs\" \
		--remove-kernel=\"TITLE=$title\$debugtitle\""
	rungrubby ${ARGS} $makedefault
	rungrubby --debug ${ARGS} --set-index=1
    else
	[ -n "$verbose" ] && echo "$grub2Config does not exist, not running grubby for grub 2"
    fi
    if [ -n "$cfgGrub2Efi" ]; then
	[ -n "$verbose" ] && echo "adding $version to $grub2EfiConfig"

	ARGS="--grub2 -c $grub2EfiConfig --efi \
		--add-kernel=$kernelImage $DEVTREE $INITRD \
		--copy-default --title \"$title\$debugtitle\" \
		${mbkernel:+--add-multiboot=\"$mbkernel\"} \
		${mbargs:+--mbargs=\"$mbargs\"} \
		--args=\"root=$rootdevice $kernargs \$debugargs\" \
		--remove-kernel=\"TITLE=$title\$debugtitle\""
	rungrubby ${ARGS} $makedefault
	rungrubby --debug ${ARGS} --set-index=1
    else
	[ -n "$verbose" ] && echo "$grub2EfiConfig does not exist, not running grubby for grub 2 with UEFI"
    fi

    if [ -n "$cfgLilo" ]; then
	[ -n "$verbose" ] && echo "adding $version to $liloConfig"

	ARGS="--$liloFlag --add-kernel=$kernelImage $INITRD \
		--copy-default --title \"$title\$debugtitle\" \
		${mbkernel:+--add-multiboot=\"$mbkernel\"} \
		${mbargs:+--mbargs=\"$mbargs\"} \
		--args=\"root=$rootdevice $kernargs \$debugargs\" \
		--remove-kernel=\"TITLE=$version\""

	rungrubby ${ARGS} $makedefault
	rungrubby --debug ${ARGS} --set-index=1
	if [ -n "$runLilo" ]; then
	    [ -n "$verbose" ] && echo "running $lilo"
	    if [ ! -x $lilo ] ; then
		[ -n "$verbose" ] && echo "$lilo does not exist"
	    else
		$lilo > /dev/null
	    fi
	fi
    else
	[ -n "$verbose" ] && echo "$liloConfig does not exist, not running grubby"
    fi

    if [ -n "$cfgExtlinux" ]; then
	[ -n "$verbose" ] && echo "adding $version to $extlinuxConfig"

	ARGS="--extlinux -c $extlinuxConfig --add-kernel=$kernelImage \
	    $INITRD --copy-default --title \"$title\$debugtitle\" \
	    ${mbkernel:+--add-multiboot=\"$mbkernel\"} \
	    ${mbargs:+--mbargs=\"$mbargs\"} \
	    --args=\"root=$rootdevice $kernargs \$debugargs\" \
	    --remove-kernel=\"TITLE=$title\$debugtitle\""

	rungrubby ${ARGS} $makedefault
	rungrubby --debug ${ARGS} --set-index=1
    else
	[ -n "$verbose" ] && echo "$extlinuxConfig does not exist, not running grubby for extlinux"
    fi
}

rpmposttrans()
{
    local files
    local f
    files="/etc/kernel/postinst.d/*[^~] /etc/kernel/postinst.d/$version/*[^~]"
    for f in $files ; do
	[ -f $f ] && [ -x $f ] || continue
	$f $version $kernelImage
    done
}

remove() {
    # FIXME: is this a good heuristic to find out if we're on iSeries?
    if [ -d /proc/iSeries ]; then
	[ -n "$verbose" ] && echo "On an iSeries, remove img file"
	rm -f $kernelImage.img 2>/dev/null
	return
    fi

    local files
    local f
    files="/etc/kernel/prerm.d/*[^~] /etc/kernel/prerm.d/$version/*[^~]"
    for f in $files ; do
	[ -f $f ] && [ -x $f ] || continue
	$f $version $kernelImage
    done

    if [ -n "$cfgGrub" ]; then
	[ -n "$verbose" ] && echo "removing $version from $grubConfig"
	$grubby --grub -c $grubConfig \
	    --remove-kernel=$kernelImage
    else
	[ -n "$verbose" ] && echo "$grubConfig does not exist, not running grubby for grub 0.97"
    fi
    if [ -n "$cfgGrub2" ]; then
	[ -n "$verbose" ] && echo "removing $version from $grub2Config"
	$grubby --grub2 -c $grub2Config \
		--remove-kernel=$kernelImage
    else
	[ -n "$verbose" ] && echo "$grub2Config does not exist, not running grubby for grub 2"
    fi
    if [ -n "$cfgGrub2Efi" ]; then
	[ -n "$verbose" ] && echo "removing $version from $grub2EfiConfig"
	$grubby --grub2 -c $grub2EfiConfig --efi \
		--remove-kernel=$kernelImage
    else
	[ -n "$verbose" ] && echo "$grub2EfiConfig does not exist, not running grubby grub 2 with UEFI"
    fi

    if [ -n "$cfgLilo" ]; then
	[ -n "$verbose" ] && echo "removing $version from $liloConfig"
	$grubby --remove-kernel=$kernelImage	    \
		     --$liloFlag

	if [ -n "$runLilo" ]; then
	    [ -n "$verbose" ] && echo "running $lilo"
	    if [ ! -x $lilo ] ; then
		[ -n "$verbose" ] && echo "$lilo does not exist"
	    else
		$lilo > /dev/null
	    fi
	fi
    else
	[ -n "$verbose" ] && echo "$liloConfig does not exist, not running grubby"
    fi

    if [ -n "$cfguBoot" ]; then
	[ -n "$verbose" ] && echo "removing $version from $ubootDir..."

	if [ -f $ubootDir/$ubootKList ]; then
	    tmpKList=`mktemp $ubootDir/$ubootKList.XXXX`
	    curversion=`tail -n1 $ubootDir/$ubootKList`
	    sed "/$version$/d" $ubootDir/$ubootKList > $tmpKList
	    newversion=`tail -n1 $tmpKList`
	    if [ -f $ubootDir/uImage-$newversion ] && [ -f $ubootDir/uInitrd-$newversion ]; then
		if [ "$curversion" != "$newversion" ]; then
		    cp -fp $ubootDir/uImage-$newversion $ubootDir/${ubootDefaultImage}
		    if [ $? -ne 0 ]; then
			[ -n "$verbose" ] && echo "copy uImage-$newversion error, default kernel not replaced!" && exit
		    fi
		    cp -fp $ubootDir/uInitrd-$newversion $ubootDir/${ubootDefaultInitrd}
		    if [ $? -ne 0 ]; then
			[ -n "$verbose" ] && echo "copy uInitrd-$newversion error, default Initrd not replaced!" && exit
		    fi
		fi

		[ -n "$verbose" ] && echo "removing uImage-$version"
		if [ -f $ubootDir/uImage-$version ]; then
		    rm -f $ubootDir/uImage-$version
		else
		    [ -n "$verbose" ] && echo "uImage-$version did not exist!"
		fi

		[ -n "$verbose" ] && echo "removing uInitrd-$version"
		if [ -f $ubootDir/uInitrd-$version ]; then
		    rm -f $ubootDir/uInitrd-$version
		else
		    [ -n "$verbose" ] && echo "uInitrd-$version did not exist!"
		fi

		mv $tmpKList $ubootDir/$ubootKList
		[ -x /sbin/a-b-c ] && /sbin/a-b-c
	    else
		[ -n "$verbose" ] && echo "uImage $newversion does not exist!"
		[ -f $tmpKList ] && rm -f $tmpKList
	    fi
        else
            [ -n "$verbose" ] && echo "No previous kernel version.  U-Boot images not removed!"
        fi
    else
	[ -n "$verbose" ] && echo "$ubootScript does not exist, not modifying $ubootDir"
    fi

    if [ -n "$cfgExtlinux" ]; then
	[ -n "$verbose" ] && echo "removing $version from $extlinuxConfig"
	$grubby --extlinux -c $extlinuxConfig \
	    --remove-kernel=$kernelImage
    else
	[ -n "$verbose" ] && echo "$extlinuxConfig does not exist, not running grubby for extlinux"
    fi
}

update() {
    if [ ! -f $kernelImage ] ; then
	[ -n "$verbose" ] && echo "kernel for $version does not exist, not running grubby"
	return
    fi

    set_title

    INITRD=""
    if [ -f $initrdfile ]; then
	[ -n "$verbose" ] && echo "found $initrdfile and using it with grubby"
	INITRD="--initrd $initrdfile"

	if [ -n "$addplymouthinitrd" ]; then
	    INITRD="$INITRD --extra-initrd $bootPrefix/initrd-plymouth.img"
	fi
    fi

    if [ -n "$cfgGrub" ]; then
	[ -n "$verbose" ] && echo "updating $version from $grubConfig"
	ARGS="--grub -c $grubConfig --update-kernel=$kernelImage $INITRD \
		${kernargs:+--args=\"$kernargs\"} \
		${removeargs:+--remove-args=\"$removeargs\"} \
		${mbkernel:+--add-multiboot=\"$mbkernel\"} \
		--title=\"$title\$debugtitle\""

	rungrubby ${ARGS}
	rungrubby --debug ${ARGS}
    else
	[ -n "$verbose" ] && echo "$grubConfig does not exist, not running grubby"
    fi

    if [ -n "$cfgGrub2" ]; then
	[ -n "$verbose" ] && echo "updating $version from $grub2Config"
	ARGS="--grub2 -c $grub2Config --update-kernel=$kernelImage $INITRD \
		${kernargs:+--args=\"$kernargs\"} \
		${removeargs:+--remove-args=\"$removeargs\"} \
		--title=\"$title\$debugtitle\""

	rungrubby ${ARGS}
	rungrubby --debug ${ARGS}
    else
	[ -n "$verbose" ] && echo "$grub2Config does not exist, not running grubby"
    fi

    if [ -n "$cfgGrub2Efi" ]; then
	[ -n "$verbose" ] && echo "updating $version from $grub2EfiConfig"
	ARGS="--grub2 -c $grub2EfiConfig --efi --update-kernel=$kernelImage \
		$INITRD ${kernargs:+--args=\"$kernargs\"} \
		${removeargs:+--remove-args=\"$removeargs\"} \
		--title=\"$title\$debugtitle\""

	rungrubby ${ARGS}
	rungrubby --debug ${ARGS}
    else
	[ -n "$verbose" ] && echo "$grub2EfiConfig does not exist, not running grubby"
    fi

    if [ -n "$cfgLilo" ]; then
	[ -n "$verbose" ] && echo "updating $version from $liloConfig"
	ARGS="--$liloFlag --update-kernel=$kernelImage $INITRD \
		${kernargs:+--args=\"$kernargs\"} \
		${removeargs:+--remove-args=\"$removeargs\"} \
		--title=\"$title\$debugtitle\""

	rungrubby ${ARGS}
	rungrubby --debug ${ARGS}

	if [ -n "$runLilo" ]; then
	    [ -n "$verbose" ] && echo "running $lilo"
	    if [ ! -x $lilo ] ; then
		[ -n "$verbose" ] && echo "$lilo does not exist"
	    else
		$lilo > /dev/null
	    fi
	fi
    else
	[ -n "$verbose" ] && echo "$liloConfig does not exist, not running grubby"
    fi

    if [ -n "$cfguBoot" ]; then
	[ -n "$verbose" ] && echo "adding $version to $ubootDir..."

	[ -n "$verbose" ] && echo "creating uImage-$version"
	mkimage -A arm -O linux -T kernel -C none -a $ubootAddress \
		-e $ubootAddress -n $version \
		-d $kernelImage $ubootDir/uImage-$version

	[ -n "$verbose" ] && echo "creating uInitrd-$version"
	mkimage -A arm -O linux -T ramdisk -C none -a 0 -e 0 \
		-n initramfs -d $initrdfile $ubootDir/uInitrd-$version

	if [ -f $ubootDir/uImage-$version ] && [ -f $ubootDir/uInitrd-$version ]; then
	    cp -fp $ubootDir/uImage-$version $ubootDir/${ubootDefaultImage}
	    if [ $? -ne 0 ]; then
		[ -n "$verbose" ] && echo "copy uImage-$version error, kernel not installed!" && exit
	    fi
	    cp -fp $ubootDir/uInitrd-$version $ubootDir/${ubootDefaultInitrd}
	    if [ $? -ne 0 ]; then
		[ -n "$verbose" ] && echo "copy uInitrd-$version error, kernel not installed!" && exit
	    fi
	    echo $version >> $ubootDir/$ubootKList
	    [ -x /sbin/a-b-c ] && /sbin/a-b-c
	else
	    [ -n "$verbose" ] && echo "cannot make $version the default"
	fi
    else
	[ -n "$verbose" ] && echo "$ubootScript does not exist, not setting up $ubootDir"
    fi

    if [ -n "$cfgExtlinux" ]; then
	[ -n "$verbose" ] && echo "updating $version from $extlinuxConfig"
	ARGS="--extlinux -c $extlinuxConfig --update-kernel=$kernelImage \
		$INITRD ${kernargs:+--args=\"$kernargs\"} \
		${removeargs:+--remove-args=\"$removeargs\"} \
		--title=\"$title\$debugtitle\""

	rungrubby ${ARGS}
	rungrubby --debug ${ARGS}
    else
	[ -n "$verbose" ] && echo "$extlinuxConfig does not exist, not running grubby"
    fi
}

doMkinitrd() {
    if [ -n "$dracut" ]; then
        tool="dracut $dracuthostonly -f $initrdfile $version"
    else
	tool="mkinitrd --allow-missing -f $initrdfile $version"
    fi
    [ -n "$verbose" ] && echo "creating initrd: $tool"
    $tool
    rc=$?
    if [ $rc != 0 ]; then
	echo "mkinitrd failed" >&2
	exit 1
    fi
}

rminitrd() {
    [ -n "$verbose" ] && echo "removing initrd $initrdfile"
    [ -f $initrdfile ] && rm -f $initrdfile
}

doDepmod() {
    [ -n "$verbose" ] && echo "running depmod for $version"
    depmod -ae -F /boot/System.map-$version $version
}

doRmmoddep() {
    [ -n "$verbose" ] && echo "removing modules.dep info for $version"
    if [ -d /lib/modules/$version ]; then
        rm -f /lib/modules/$version/modules.*.bin \
            /lib/modules/$version/modules.{alias,dep,devname,symbols,softdep}
    fi
}

# kernel image for 2.4 is vmlinux
if [ $ARCH = 'ppc64' -o $ARCH = 'ppc' ]; then
  if [ "$kernelmajor" == "2.4" ]; then
      kernelName=vmlinux
  fi
fi

while [ $# -gt 0 ]; do
    case $1 in
	--mkinitrd)
	    initrd="make"
	    ;;

	--rminitrd)
	    initrd="remove"
	    ;;

	--devtree*)
	    if [[ $1 == --devtree\=* ]]; then
		devtreefile=${1#--devtreefile=}
	    else
		devtreefile=$2
		shift
	    fi
	    ;;

	--dracut)
	    dracut=--dracut
	    ;;

	--host-only)
	    dracuthostonly=-H
	    ;;

	--initrdfile*)
	    if [[ $1 == --initrdfile\=* ]]; then
		initrdfile=${1#--initrdfile=}
	    else
		initrdfile=$2
		shift
	    fi
	    ;;

	--kernel-args*)
	    if [[ $1 == --kernel-args\=* ]]; then
		kernargs=${1#--kernel-args=}
	    else
		kernargs=$2
		shift
	    fi
	    ;;

	--remove-args*)
	    if [[ $1 == --remove-args\=* ]]; then
		removeargs=${1#--remove-args=}
	    else
		removeargs=$2
		shift
	    fi
	    ;;

	--banner*)
	    if [[ $1 == --banner\=* ]]; then
		banner=${1#--banner=}
	    else
		banner=$2
		shift
	    fi
	    ;;

	--multiboot*)
	    if [[ $1 == --multiboot\=* ]]; then
		mbkernel=${1#--multiboot=}
	    else
		# can't really support having an optional second arg here
		# sorry!
		mbkernel="/boot/xen.gz"
	    fi
	    ;;

        --mbargs*)
            if [[ $1 == --mbargs\=* ]]; then
                mbargs=${1#--mbargs=}
            else
                mbargs="$2"
                shift
            fi
            ;;

	--depmod)
	    moddep="make"
	    ;;

	--rmmoddep)
	    moddep="remove"
	    ;;

	--make-default)
	    makedefault="--make-default"
	    ;;

        --package*)
            if [[ $1 == --package\=* ]]; then
                package=${1#--package=}
            else
                package=$2
                shift
            fi
            ;;

	--add-dracut-args)
	    adddracutargs=--add-dracut-args
	    ;;

	--add-plymouth-initrd)
	    addplymouthinitrd=--add-plymouth-initrd
	    ;;

        --kernel-image*)
            if [[ $1 == --kernel-image\=* ]]; then
                kernelImage=${1#--kernel-image=}
            else
                kernelImage="$2"
                shift
            fi
            if ! [[ -f $kernelImage ]]; then
                echo "Can't find kernel image '$kernelImage'" >&2
                usage
                exit 1
            fi
            ;;

        --kernel-name*)
            if [[ $1 == --kernel-name\=* ]]; then
                kernelName=${1#--kernel-name=}
            else
                kernelName="$2"
                shift
            fi
            ;;

	-v)
	    verbose=-v
	    ;;

	*)
	    if [ -z "$mode" ]; then
		mode=$1
	    elif [ -z "$version" ]; then
		version=$1
	    else
		usage
	    fi
	    ;;
    esac

    shift
done

# make sure the mode is valid
if [ "$mode" != "--install" -a "$mode" != "--remove"  -a "$mode" != "--update" -a "$mode" != "--rpmposttrans" ] ; then
    usage
fi

if [ -z "$version" ]; then
    usage
fi

if [ "$mode" != "--install" -a "$makedefault" ]; then
    usage
fi

kernelmajor=`echo $kernel | cut -d . -f 1,2`

[[ $kernelImage ]] || kernelImage="$bootPrefix/$kernelName-$version"

# set the initrd file based on arch; ia64 is the only currently known oddball
if [ -z "$initrdfile" ]; then
    INITRD_NAME_PREFIX="initrd"
    if [ -n "$dracut" ]; then
	INITRD_NAME_PREFIX="initramfs"
    fi

    if [ `uname -m` = "ia64" ]; then
	initrdfile="/boot/efi/EFI/redhat/$INITRD_NAME_PREFIX-$version.img"
    else
	initrdfile="/boot/$INITRD_NAME_PREFIX-$version.img"
    fi

fi
[ -n "$verbose" ] && echo "initrdfile is $initrdfile"

# add dracut i18n, keyboard and plymouth kernel args if requested
if [ -n "$dracut" -o -n "$adddracutargs" ]; then
    if [ -r /etc/vconsole.conf ]; then
	. /etc/vconsole.conf
    elif  [ -r /etc/sysconfig/keyboard ]; then
	. /etc/sysconfig/keyboard
    fi

    if [ -r /etc/locale.conf ]; then
	. /etc/locale.conf
    elif [ -r /etc/sysconfig/i18n ]; then
	. /etc/sysconfig/i18n
    fi

    for i in SYSFONT SYSFONTACM UNIMAP LANG KEYTABLE; do
        val=$(eval echo \$$i)
        [ -n "$val" ] && kernargs="$kernargs $i=$val"
    done

    if [ -n "$KEYBOARDTYPE" -a "$KEYBOARDTYPE" != "pc" ]; then
         kernargs="$kernargs KEYBOARDTYPE=$KEYBOARDTYPE"
    fi
fi

# set this as the default if we have the package and it matches
if [ "$mode" == "--install" -a "$UPDATEDEFAULT" == "yes" -a -n "$package" -a -n "$DEFAULTKERNEL" -a "$package" == "$DEFAULTKERNEL" ]; then
    makedefault="--make-default"
    [ -n "$verbose" ] && echo "making it the default based on config"
fi

if [ "$moddep" == "make" ]; then
    doDepmod
elif [ "$moddep" == "remove" ]; then
    doRmmoddep
fi

if [ "$initrd" == "make" ]; then
    doMkinitrd
elif [ "$initrd" == "remove" ]; then
    rminitrd
fi

if [ ! -x $grubby ] ; then
    [ -n "$verbose" ] && echo "$grubby does not exist"
    exit 0
fi


[ -n "$grubConfig" ] && [ -f "$grubConfig" ] && cfgGrub=1;
[ -n "$grub2Config" ] && [ -f "$grub2Config" ] && cfgGrub2=1;
[ -n "$grub2EfiConfig" ] && [ -f "$grub2EfiConfig" ] && cfgGrub2Efi=1;
[ -n "$liloConfig" ] && [ -f "$liloConfig" ] && cfgLilo=1;
[ -n "$extlinuxConfig" ] && [ -f "$extlinuxConfig" ] && cfgExtlinux=1;

# if we have a U-Boot directory, but no boot script, check if the directory
# is mounted.  If not, mount it, and then check if a boot script exists.
if [ -n "$ubootDir" ]; then
    if [ -f "$ubootScript" ]; then
        cfguBoot=1
    else
	mountEntry=`mount | grep $ubootDir`
	if [ -z "$mountEntry" ]; then
	    mount $ubootDevice $ubootDir
	    mounted=1
	fi
	[ -f "$ubootScript" ] && cfguBoot=1;
    fi
fi

# if we're using U-Boot, check if the default load address should change
if [ -n "$cfguBoot" -a -z "$UBOOT_IMGADDR" ]; then
    [[ $version  =~ .([^.]*)$ ]]
    platform=${BASH_REMATCH[1]}
    # A few platforms use an alternate kernel load address
    if [ "$platform" = "omap" ]; then
        ubootAddress=0x80008000
    elif [ "$platform" = "imx" ]; then
        ubootAddress=0x90008000
    fi
fi

# if we have a lilo config on an x86 box, see if the default boot loader
# is lilo to determine if it should be run
if [ -n "$cfgLilo" -a -n "$isx86" ]; then
    runLilo=$($grubby --bootloader-probe | grep lilo)
fi

if [ "$mode" == "--install" ]; then
    install
elif [ "$mode" == "--remove" ]; then
    remove
elif [ "$mode" == "--update" ]; then
    update
elif [ "$mode" == "--rpmposttrans" ]; then
    rpmposttrans
fi

# if we mounted the U-Boot directory, unmount it.
[ -n "$mounted" ] && umount $ubootDir

# make sure changes make it to the disk.
# if /boot is a mountpoint, force the meta data on disk
# to by-pass writeback delay.
# PPC64LE-only to deal with Petitboot issues
if [ "$ARCH" = "ppc64le" ]; then
    sync && mountpoint -q /boot &&fsfreeze -f /boot && fsfreeze -u /boot
fi

exit 0
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