#!/bin/sh

# This little script is aimed at easing the Linux kernel compilation and
# installation. No guarantee is given on its suitability to your own system
# though.

function check_error() {
	ret=$?
	if (( $ret != 0 )) ; then
		echo "Error while building the kernel..."
		exit $ret
	fi
}

TITLE="Linux kernel compilation"
MAKE="/tmp/make.$$"
TEMP="/tmp/kernel-compilation.log"

echo >$TEMP
/bin/ln -s /usr/bin/make $MAKE
check_error

(
/bin/sleep 1

cd /usr/src/linux
check_error

Xdialog --title "$TITLE" --yesno "make mrproper first ?" 0 0
if (( $? == 0 )) ; then
	echo "--------------------------------------------------------------------------"
	echo "Making mrproper..."
	echo "--------------------------------------------------------------------------"
	$MAKE mrproper 2>&1
	check_error
fi

if [ -f /usr/src/linux/.config ] ; then
	Xdialog --title "$TITLE" --yesno "Configure the kernel ?" 0 0
	if (( $? == 0 )) ; then
		echo "--------------------------------------------------------------------------"
		echo "Making xconfig..."
		echo "--------------------------------------------------------------------------"
		$MAKE xconfig 2>&1
		check_error
	fi
else
	echo "--------------------------------------------------------------------------"
	echo "Making xconfig..."
	echo "--------------------------------------------------------------------------"
	$MAKE xconfig 2>&1
	check_error
fi
echo "--------------------------------------------------------------------------"
echo "Making depends..."
echo "--------------------------------------------------------------------------"
$MAKE dep 2>&1
check_error
echo "--------------------------------------------------------------------------"
echo "Cleaning up..."
echo "--------------------------------------------------------------------------"
$MAKE clean 2>&1
check_error
echo "--------------------------------------------------------------------------"
echo "Making kernel..."
echo "--------------------------------------------------------------------------"
$MAKE bzImage 2>&1
check_error
echo "--------------------------------------------------------------------------"
echo "Making modules..."
echo "--------------------------------------------------------------------------"
$MAKE modules 2>&1
check_error
echo "--------------------------------------------------------------------------"
echo "Installing modules..."
echo "--------------------------------------------------------------------------"
$MAKE modules_install 2>&1
check_error

VERSION=`/bin/grep UTS_RELEASE /usr/src/linux/include/linux/version.h | /bin/awk --source '{ print $3 }'`
echo -n "VERSION=" >/tmp/version.$$
echo $VERSION >>/tmp/version.$$
. /tmp/version.$$
/bin/rm -f /tmp/version.$$
echo "--------------------------------------------------------------------------"
echo "Installing kernel v$VERSION... "
echo "--------------------------------------------------------------------------"
/bin/cp -f /usr/src/linux/.config /boot/config-$VERSION 2>&1
/bin/cp -f /usr/src/linux/System.map /boot/System.map-$VERSION 2>&1
/bin/cp -f /usr/src/linux/arch/i386/boot/bzImage /boot/vmlinuz-$VERSION 2>&1
if [ -f /boot/module-info-`uname -r` ] && ! [ -f /boot/module-info-$VERSION ] ; then
	/bin/cp -f /boot/module-info-`uname -r` /boot/module-info-$VERSION 2>&1
fi
Xdialog --title "$TITLE" --yesno "Make the new kernel the current one ?" 0 0
if (( $? == 0 )) ; then
	echo "--------------------------------------------------------------------------"
	echo "Making v$VERSION the current kernel... "
	echo "--------------------------------------------------------------------------"
	/bin/ln -sf /boot/System.map-$VERSION /boot/System.map 2>&1
	/bin/ln -sf /boot/vmlinuz-$VERSION /boot/vmlinuz 2>&1
	if [ -f /boot/module-info-$VERSION ] ; then
		/bin/ln -sf /boot/module-info-$VERSION /boot/module-info 2>&1
	fi
	if [ -f /boot/map ] && [ -f /sbin/lilo ] && [ -f /etc/lilo.conf ] ; then
		Xdialog --title "$TITLE" --yesno "Install the new kernel with lilo ?" 0 0
		if (( $? == 0 )) ; then
			echo "--------------------------------------------------------------------------"
			echo "Running lilo... "
			echo "--------------------------------------------------------------------------"
			/sbin/lilo 2>&1
		fi
	fi
fi
echo ""
echo "done !"
) | /bin/cat >$TEMP &

PID=$!

Xdialog --title "$TITLE" --no-button --smooth --tailbox $TEMP 40 80
/usr/bin/killall $MAKE 2>/dev/null
kill $PID 2>/dev/null
/bin/rm -f $MAKE
echo >$TEMP