1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0+
3#
4# Usage: configinit.sh config-spec-file results-dir
5#
6# Create a .config file from the spec file.  Run from the kernel source tree.
7# Exits with 0 if all went well, with 1 if all went well but the config
8# did not match, and some other number for other failures.
9#
10# The first argument is the .config specification file, which contains
11# desired settings, for example, "CONFIG_NO_HZ=y".  For best results,
12# this should be a full pathname.
13#
14# Copyright (C) IBM Corporation, 2013
15#
16# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
17
18T=${TMPDIR-/tmp}/configinit.sh.$$
19trap 'rm -rf $T' 0
20mkdir $T
21
22# Capture config spec file.
23
24c=$1
25resdir=$2
26
27sed -e 's/^\(CONFIG[0-9A-Z_]*\)=.*$/grep -v "^# \1" |/' < $c > $T/u.sh
28sed -e 's/^\(CONFIG[0-9A-Z_]*=\).*$/grep -v \1 |/' < $c >> $T/u.sh
29grep '^grep' < $T/u.sh > $T/upd.sh
30echo "cat - $c" >> $T/upd.sh
31make clean > $resdir/Make.clean 2>&1
32make $TORTURE_DEFCONFIG > $resdir/Make.defconfig.out 2>&1
33mv .config .config.sav
34sh $T/upd.sh < .config.sav > .config
35cp .config .config.new
36yes '' | make oldconfig > $resdir/Make.oldconfig.out 2> $resdir/Make.oldconfig.err
37
38# verify new config matches specification.
39configcheck.sh .config $c
40
41exit 0
42