#!/bin/sh
# $Id: installkernel,v 1.2 2004/05/07 17:16:41 at Exp $
#--------------------------------------------------------------------
# Copyright (C) 2000, 2002 by MandrakeSoft,
# Chmouel Boudjnah <chmouel@mandrakesoft.com>,
# Redistribution of this file is permitted under the terms of the GNU
# Public License (GPL)
#--------------------------------------------------------------------
# Copyright (C) 2003, 2004 by ALT Linux Team,
# Alexey Tourbin <at@altlinux.org>.
#--------------------------------------------------------------------
# description: Install a kernel to /boot and add an entry for grub and lilo

: ${INSTALLKERNEL_CONFIG:=/etc/sysconfig/installkernel}
if [ -f "$INSTALLKERNEL_CONFIG" ]; then
	. "$INSTALLKERNEL_CONFIG"
fi

if [ -n "$DURING_INSTALL" ]; then
	echo "$0: DURING_INSTALL=$DURING_INSTALL; supposed to run later" 1>&2
	exit 0
fi

usage()
{
	cat <<EOF >&2
Usage: $0 [options] KERNEL_VERSION

  -n, --nolaunch	don't launch lilo;
  -R, --remove		remove bootloader entry and prepare to remove kernel;
  -m, --memtest		it's all about memtest86, not Linux kernel;
  -h, --help		this help.
EOF
	[ -n "$1" ] && exit "$1" || exit 2
}

LEGACY=algyNdsSCiLc
ARGV=`getopt -n "$0" -o nRmh$LEGACY -l nolaunch,remove,memtest,help -- "$@"` || usage
eval set -- "$ARGV"

while :; do
	case "$1" in
		-n|--nolaunch) NOLAUNCH=$1; shift
			;;
		-R|--remove) REMOVE=$1; shift
			;;
		-m|--memtest) MEMTEST=$1; shift
			;;
		-h|--help) shift; usage 0
			;;
		--) shift; break
			;;
		-[$LEGACY]) echo "$0: legacy option $1 ignored" >&2
			;;
		*) echo "$0: unrecognized option: $1" >&2; exit 1
			;;
	esac
done

VERSION="$1"
: ${BOOTDIR:=/boot}

if OLD_KERNEL=`realpath "$BOOTDIR/vmlinuz" 2>/dev/null`; then
	OLD_VERSION="${OLD_KERNEL##*/vmlinuz-}"
fi

cd "$BOOTDIR"
if [ -z "$REMOVE" -a -z "$MEMTEST" ]; then
	ln -snf "vmlinuz-$VERSION" vmlinuz
	ln -snf "initrd-$VERSION.img" initrd.img
	if [ -z "${VERSION##*-up-*}" ]; then
		ln -snf "vmlinuz-$VERSION" vmlinuz-up
		ln -snf "initrd-$VERSION.img" initrd-up.img
	fi
	if [ -z "${VERSION##*-smp-*}" ]; then
		ln -snf "vmlinuz-$VERSION" vmlinuz-smp
		ln -snf "initrd-$VERSION.img" initrd-smp.img
	fi
elif [ -z "$MEMTEST" ]; then
	rm -f "initrd-$VERSION.img"
fi
cd -

: ${LILO_CONF:=/etc/lilo.conf}
: ${GRUB_MENU_LST:=$BOOTDIR/grub/menu.lst}
: ${GRUB_DEVICE_MAP:=$BOOTDIR/grub/device.map}
: ${PERL:=/usr/bin/perl}
: ${LILO:=/sbin/lilo}
: ${DETECTLOADER:=/usr/sbin/detectloader}
: ${MKINITRD:=/sbin/mkinitrd}

# make initrd
"$MKINITRD" -f --ifneeded "$BOOTDIR/initrd-$VERSION.img" "$VERSION"

# check perl
if [ ! -x "$PERL" ]; then
	echo "$0: warning: $PERL not available; supposed to run manually..."
	PERL="echo $PERL"
fi

# modify lilo config
if [ -f "$LILO_CONF" -a -x "$sharfile/lilo" ]; then
	if [ -z "$REMOVE" -a -z "$MEMTEST" -a -n "$OLD_VERSION" ]; then
		"$PERL" "$sharfile/lilo" "$OLD_VERSION"
	fi
	"$PERL" "$sharfile/lilo" $MEMTEST $REMOVE "$VERSION"
fi

# modify grub config
if [ -f "$GRUB_MENU_LST" -a -f "$GRUB_DEVICE_MAP" -a -x "$sharfile/grub" ]; then
	if [ -z "$REMOVE" -a -z "$MEMTEST" -a -n "$OLD_VERSION" ]; then
		"$PERL" "$sharfile/grub" "$OLD_VERSION"
	fi
	"$PERL" "$sharfile/grub" $MEMTEST $REMOVE "$VERSION"
fi

# launch lilo
if [ -z "$LOADER" -a -x "$DETECTLOADER" ]; then
	LOADER=`$PERL $DETECTLOADER -q`
fi
if [ "$LOADER" = LILO -a -z "$NOLAUNCH" ]; then
	"$LILO" >/dev/null ||:
fi