Configure

#! /bin/sh
# Configure	This script is used to configure the Linux kernel.
#
# Usage:	Configure [-pro]
#
# Version;	@(#)Configure	1.3	04/05/93
#
# Author:	Linus Torvalds, <torvalds@helsinki.fi>
#

  # Set variables to initial state.
  OPTS=""
  CONFIG=.config~
  CONFIG_H=include/linux/autoconf.h
  next="y"
  old="y"

  # Check commandline arguments.
  >config.new
  while [ $# != 0 ]
  do
	case $1 in
		-pro)	OPTS="UTS_SYSNAME \"LINUX/Pro\""
			;;
		*)	echo "Usage: Configure [-pro]"
			exit 1
			;;
	esac
	shift
  done
 	
  echo "#" > $CONFIG
  echo "# Automatically generated make config: don't edit" >> $CONFIG
  echo "#" >> $CONFIG

  echo "/*" > $CONFIG_H
  echo " * Automatically generated C config: don't edit" >> $CONFIG_H
  echo " */" >> $CONFIG_H

  # First of all, emit the "special" features to <linux/autoconf.h>.
  if [ "${OPTS}" ]
  then
	echo "#define ${OPTS}" >> $CONFIG_H
  fi

  # Read our standard input (which is the CONFIG.IN file).
  while read i
  do
	echo $i >> config.new
  	echo >> $CONFIG
  	echo >> $CONFIG_H
  	echo
	echo "#" >> $CONFIG
	echo "/*" >> $CONFIG_H
	echo "**"
	while [ "$i" != "." -a "$i" != ":" ]
	do
		echo "# "$i >> $CONFIG
		echo " * "$i >> $CONFIG_H
		echo "**" $i
		read i || break
		echo $i >> config.new
	done
	echo "#" >> $CONFIG
	echo " */" >> $CONFIG_H
	echo "**"
	read i || break
	echo $i >> config.new
	while [ "$i" != "." -a "$i" != ":" ]
	do
		read j ques def || break
		if [ "$old" = "n" ]
		then
			echo No $i
			ans="n"
		else
			echo -n $i '('$ques', default='$def')? '
			read ans < /dev/tty
			if [ "$ans" = "" ]
			then
				ans=$def
			fi
		fi
		echo $j $ques $ans >> config.new
		if [ "$ans" = "y" ]
		then
			echo $j = $j >> $CONFIG
			echo "#define" $j 1 >> $CONFIG_H
			next="y";
		fi
		read i || break
		echo $i >> config.new
	done
	old=$next
	next="y"
	if [ "$i" = ":" ]
	then
		next="n"
	fi
  done
  mv config.new config.in

  echo
  echo "The linux kernel is now hopefully configured for your setup."
  echo "Check the top-level Makefile for additional configuration,"
  echo "and do a 'make dep ; make clean' if you want to be sure all"
  echo "the files are correctly re-made"
  echo

  exit 0