1#! /bin/sh 2# 3# This script is used to configure the linux kernel. 4# 5# It was inspired by the challenge in the original Configure script 6# to ``do something better'', combined with the actual need to ``do 7# something better'' because the old configure script wasn't flexible 8# enough. 9# 10# Please send comments / questions / bug fixes to raymondc@microsoft.com. 11# 12# Each line in the config file is a command. 13# 14# 050793 - use IFS='@' to get around a bug in a pre-version of bash-1.13 15# with an empty IFS. 16 17# 18# Make sure we're really running bash. 19# 20# I would really have preferred to write this script in a language with 21# better string handling, but alas, bash is the only scripting language 22# that I can be reasonable sure everybody has on their linux machine. 23# 24[ -z "$BASH" ] && { echo "Configure requires bash" 1>&2; exit 1; } 25 26# Disable filename globbing once and for all. 27# Enable function cacheing. 28set -f -h 29 30# 31# readln reads a line into $ans. 32# 33# readln prompt default 34# 35function readln () { 36 if [ "$DEFAULT" = "-d" ]; then 37 echo "$1" 38 ans=$2 39 else 40 echo -n "$1" 41 IFS='@' read ans </dev/tty || exit 1 42 [ -z "$ans" ] && ans=$2 43 fi 44} 45 46# 47# comment does some pretty-printing 48# 49# comment 'xxx' 50# 51function comment () { 52 echo "*"; echo "* $1" ; echo "*" 53 (echo "" ; echo "#"; echo "# $1" ; echo "#") >>$CONFIG 54 (echo "" ; echo "/*"; echo " * $1" ; echo " */") >>$CONFIG_H 55} 56 57# 58# bool processes a boolean argument 59# 60# bool question define default 61# 62function bool () { 63 ans="" 64 def=$(eval echo "\${$2:-$3}") 65 while [ "$ans" != "y" -a "$ans" != "n" ]; do 66 readln "$1 ($2) [$def] " "$def" 67 done 68 if [ "$ans" = "y" ]; then 69 echo "$2=y" >>$CONFIG 70 echo "#define $2 1" >>$CONFIG_H 71 else 72 echo "# $2 is not set" >>$CONFIG 73 echo "#undef $2" >>$CONFIG_H 74 fi 75 eval "$2=$ans" 76} 77 78# 79# int processes an integer argument 80# 81# int question define default 82# 83function int () { 84 # Slimier hack to get bash to rescan a line. 85 ans="x" 86 def=$(eval echo "\${$2:-$3}") 87 while [ $[$ans+0] != "$ans" ]; do 88 readln "$1 ($2) [$def] " "$def" 89 done 90 echo "$2=$ans" >>$CONFIG 91 echo "#define $2 ($ans)" >>$CONFIG_H 92 eval "$2=$ans" 93} 94 95CONFIG=.tmpconfig 96CONFIG_H=.tmpconfig.h 97trap "rm -f $CONFIG $CONFIG_H ; exit 1" 1 2 98 99# 100# Make sure we start out with a clean slate. 101# 102echo "#" > $CONFIG 103echo "# Automatically generated make config: don't edit" >> $CONFIG 104echo "#" >> $CONFIG 105 106echo "/*" > $CONFIG_H 107echo " * Automatically generated C config: don't edit" >> $CONFIG_H 108echo " */" >> $CONFIG_H 109 110DEFAULT="" 111if [ "$1" = "-d" ] ; then 112 DEFAULT="-d" 113 shift 114fi 115 116CONFIG_IN=./config.in 117if [ "$1" != "" ] ; then 118 CONFIG_IN=$1 119fi 120 121if [ -f ./.config ] ; then 122 . ./.config 123 sed -e 's/# \(.*\) is not.*/\1=n/' <./.config >/tmp/conf.$$ 124 . /tmp/conf.$$ 125 rm /tmp/conf.$$ 126fi 127. $CONFIG_IN 128 129if [ "$CONFIG_SOUND" = "y" ] ; then 130 $MAKE -C drivers/sound config || exit 1 131fi 132 133rm -f .config.old 134if [ -f .config ]; then 135 mv .config .config.old 136fi 137mv .tmpconfig .config 138mv .tmpconfig.h include/linux/autoconf.h 139 140echo 141echo "The linux kernel is now hopefully configured for your setup." 142echo "Check the top-level Makefile for additional configuration," 143echo "and do a 'make dep ; make clean' if you want to be sure all" 144echo "the files are correctly re-made" 145echo 146 147exit 0 148