#!/usr/pkg/bin/bash
# rebuild specified kernel which is already configured in /etc/lilo.conf
die() {
 [ "$@" ] && echo "$@" >&2
 exit 1
}
[ -w "/" ] || die "Must be root"
version=$1
kernelversion=`echo $version | sed -e 's/-.*//'` # chop extraversion if any
extraversion=`echo $version | sed -e 's/^[^-]*//'`
extension=`echo $extraversion | sed -e 's/^-//'`
if ! cd /usr/src/linux-$kernelversion; then
 echo "Must specify valid version, e. g. 2.6.6" >&2
 exit 1
fi
if [ "$version" != "$kernelversion" -a ! -L "../$version" \
 -a ! -d "../$version" ]; then
 ln -sf . ../$version
fi
if [ -f "Makefile.$extension" ]; then
 ln -sf Makefile.$extension Makefile
fi
if [ -f "config.$extension" ]; then
 ln -sf config.$extension .config
else
 die "No configfile for $version kernel!"
fi
if ! grep -q "^EXTRAVERSION = $extraversion\$" Makefile; then
 echo This makefile is wrong for $version
 exit 1
fi
if ! make menuconfig; then
 die
else
 # the old .config was renamed to .config.old, and a new file written...
 rm .config.old # remove the link
 mv -f .config config.$extension # overwrite with new configuration
 ln -s config.$extension .config # now link to it
fi
if ! make dep clean bzImage; then exit; fi
if grep -q 'CONFIG_MODULES=y' .config; then
 if ! make modules modules_install; then die "Failed module build"; fi
 if ! grep -iq 'advanced linux sound architecture' .config; then
  if which rebuild_alsa; then
   if ! rebuild_alsa $version; then die "Failed rebuilding sound drivers"; fi
  fi
 fi
fi
cp System.map /boot/System.map-$version
cp arch/i386/boot/bzImage /boot/vmlinuz-$version
cp .config /boot/config-$version
lilo