1#!/bin/bash 2# 3# Usage: configinit.sh config-spec-file [ build output dir ] 4# 5# Create a .config file from the spec file. Run from the kernel source tree. 6# Exits with 0 if all went well, with 1 if all went well but the config 7# did not match, and some other number for other failures. 8# 9# The first argument is the .config specification file, which contains 10# desired settings, for example, "CONFIG_NO_HZ=y". For best results, 11# this should be a full pathname. 12# 13# The second argument is a optional path to a build output directory, 14# for example, "O=/tmp/foo". If this argument is omitted, the .config 15# file will be generated directly in the current directory. 16# 17# This program is free software; you can redistribute it and/or modify 18# it under the terms of the GNU General Public License as published by 19# the Free Software Foundation; either version 2 of the License, or 20# (at your option) any later version. 21# 22# This program is distributed in the hope that it will be useful, 23# but WITHOUT ANY WARRANTY; without even the implied warranty of 24# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25# GNU General Public License for more details. 26# 27# You should have received a copy of the GNU General Public License 28# along with this program; if not, you can access it online at 29# http://www.gnu.org/licenses/gpl-2.0.html. 30# 31# Copyright (C) IBM Corporation, 2013 32# 33# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com> 34 35T=/tmp/configinit.sh.$$ 36trap 'rm -rf $T' 0 37mkdir $T 38 39# Capture config spec file. 40 41c=$1 42buildloc=$2 43builddir= 44if test -n $buildloc 45then 46 if echo $buildloc | grep -q '^O=' 47 then 48 builddir=`echo $buildloc | sed -e 's/^O=//'` 49 if test ! -d $builddir 50 then 51 mkdir $builddir 52 fi 53 else 54 echo Bad build directory: \"$builddir\" 55 exit 2 56 fi 57fi 58 59sed -e 's/^\(CONFIG[0-9A-Z_]*\)=.*$/grep -v "^# \1" |/' < $c > $T/u.sh 60sed -e 's/^\(CONFIG[0-9A-Z_]*=\).*$/grep -v \1 |/' < $c >> $T/u.sh 61grep '^grep' < $T/u.sh > $T/upd.sh 62echo "cat - $c" >> $T/upd.sh 63make mrproper 64make $buildloc distclean > $builddir/Make.distclean 2>&1 65make $buildloc $TORTURE_DEFCONFIG > $builddir/Make.defconfig.out 2>&1 66mv $builddir/.config $builddir/.config.sav 67sh $T/upd.sh < $builddir/.config.sav > $builddir/.config 68cp $builddir/.config $builddir/.config.new 69yes '' | make $buildloc oldconfig > $builddir/Make.oldconfig.out 2> $builddir/Make.oldconfig.err 70 71# verify new config matches specification. 72configcheck.sh $builddir/.config $c 73 74exit 0 75