Gentoo-Upgrade/sbin/kernel-rebuild.sh

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#!/bin/bash
SILENT=false
NICE_CMD="nice -n 19 ionice -c2"
# available parameters
eval set -- "`getopt -o hs --long help,silent -- \"$@\"`"
while true ; do
case "$1" in
-h|--help)
echo "Usage: kernel-rebuild.sh [keys]..."
echo "Keys:"
echo -e "-h, --help\tShow this help and exit."
echo -e "-s, --silent \tMake with silentoldconfig."
echo
echo -e "This program works on any GNU/Linux with GNU Baurne's shell"
echo -e "Report bugs to <mecareful@gmail.com>"
exit 0
;;
-s|--silent) SILENT=true ; shift ;;
--) shift ; break ;;
*) echo "Internal error!" ; exit -1 ;;
esac
done
CONFIG_FILE=/proc/config.gz
[ "$1" != "" ] && CONFIG_FILE=$1
cd /usr/src/linux
[ "$?" != "0" ] && echo /usr/src/linux doesn\'t exist && exit -1
zcat $CONFIG_FILE >.config 2>/dev/null || cat $CONFIG_FILE >.config
[ "$?" != "0" ] && echo "$CONFIG_FILE doesn't exist or /usr mounted as read-only" && exit -1
if [ true == "$SILENT" ]; then
yes "" | make silentoldconfig
[ "$?" != "0" ] && echo "======= yes \"\" | make silentoldconfig failed ;-( =======" && exit -1
else
make MENUCONFIG_MODE=single_menu MENUCONFIG_COLOR=mono menuconfig
[ "$?" != "0" ] && echo "======= make menuconfig failed ;-( =======" && exit -1
fi
# disable distcc for -march=native -mtune=native
grep 'CONFIG_X86_MARCH_NATIVE=y' .config &>/dev/null
jobs=$((`grep "^processor" /proc/cpuinfo -c`+1))
if [[ "$?" == 0 ]]; then
$NICE_CMD make -j$jobs
[ 0 -ne $? ] && echo "Kernel build failed ;-(" && exit -1
else
# pump make -j$((jobs*3)) || make -j$jobs
$NICE_CMD make -j$jobs
[ 0 -ne $? ] && echo "Kernel build failed ;-(" && exit -1
fi
echo "remounting /boot -> rw"
mount -o remount,rw /boot
$NICE_CMD make install
$NICE_CMD make modules_install
REVISION=`cat /usr/src/linux/include/config/kernel.release`
which dracut &>/dev/null && $NICE_CMD dracut --hostonly --force /boot/initramfs-$REVISION.img $REVISION
sed -i "s~\/boot\/vmlinuz-[0-9][^ ]*~\/boot\/vmlinuz-$REVISION~g;
s~\/boot\/initramfs-[0-9][^ ]*~\/boot\/initramfs-$REVISION.img~g" \
/boot/grub/grub.conf
echo "remounting /boot -> ro"
mount -o remount,ro /boot
echo "--------- Rebuilding kernel modules ---------"
emerge -1qv @module-rebuild
[ 0 -ne $? ] && echo "Upgrading kernel modules failed ;-(" && exit -1
cd $pwdtmp
exit 0