Initial revision

1 files changed, 161 insertions, 0 deletions

diff --git a/configure.sh b/configure.sh
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+#!/bin/bash
+#
+# Configure.sh	Generates interactively a config.h from config.in
+#
+# net-tools	A collection of programs that form the base set of the
+#		NET-3 Networking Distribution for the LINUX operating
+#		system.
+#
+# Usage:	Install.sh [--nobackup] [--test]
+#
+# Version:	Install.sh 1.65	(1996-01-12)
+#
+# Authors:	Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
+#		Johannes Grosen, <grosen@argv.cs.ndsu.nodak.edu>
+#		Copyright 1988-1993 MicroWalt Corporation
+#
+# Modified:
+#        {1.65} Bernd eckes Eckenfels <net-tools@lina.inka.de>
+#		some layout cleanups, slattach/plipconfig removed.
+#		--test for testinstallations added.
+#
+#		This program is free software; you can redistribute it
+#		and/or  modify it under  the terms of  the GNU General
+#		Public  License as  published  by  the  Free  Software
+#		Foundation;  either  version 2 of the License, or  (at
+#		your option) any later version.
+#
+#
+# Make sure we're really running bash.
+#
+# I would really have preferred to write this script in a language with
+# better string handling, but alas, bash is the only scripting language
+# that I can be reasonable sure everybody has on their Linux machine.
+#
+
+CONFIG=config.h
+
+
+[ -z "$BASH" ] && { echo "Configure requires bash" 1>&2; exit 1; }
+
+# Disable filename globbing once and for all.
+# Enable function cacheing.
+set -f -h
+
+#
+# readln reads a line into $ans.
+#
+#	readln prompt default
+#
+function readln()
+{
+  echo -n "$1"
+  IFS='@' read ans </dev/tty || exit 1
+  [ -z "$ans" ] && ans=$2
+}
+
+# bool processes a boolean argument
+#
+#	bool tail
+#
+function bool()
+{
+  # Slimier hack to get bash to rescan a line.
+  eval "set -- $1"
+  ans=""
+  while [ "$ans" != "y" -a "$ans" != "n" ]
+  do
+	readln "$1 ($2) [$3] " "$3"
+  done
+  if [ "$ans" = "y" ]; then
+	echo "#define $2 1" >>${CONFIG}
+    else
+	echo "#define $2 0" >>${CONFIG}
+  fi
+  raw_input_line="bool '$1' $2 $ans"
+  eval "$2=$ans"
+}
+
+# int processes an integer argument
+#
+#	int tail
+#
+function int()
+{
+  # Slimier hack to get bash to rescan a line.
+  eval "set -- $1"
+  ans="x"
+  while [ $[$ans+0] != "$ans" ];
+  do
+	readln "$1 ($2) [$3] " "$3"
+  done
+  echo "#define $2 ($ans)" >>${CONFIG}
+  raw_input_line="int '$1' $2 $ans"
+  eval "$2=$ans"
+}
+
+  #
+  # Make sure we start out with a clean slate.
+  #
+  > config.new
+  > ${CONFIG}
+
+  stack=''
+  branch='t'
+
+  while IFS='@' read raw_input_line
+  do
+	# Slimy hack to get bash to rescan a line.
+	read cmd rest <<-END_OF_COMMAND
+		$raw_input_line
+	END_OF_COMMAND
+
+	if [ "$cmd" = "*" ]; then
+		if [ "$branch" = "t" ]; then
+			echo "$raw_input_line"
+			# echo "# $rest" >>$CONFIG
+			if [ "$prevcmd" != "*" ]; then
+				echo >>${CONFIG}
+				echo "/* $rest" >>${CONFIG}
+			else
+				echo " * $rest" >>${CONFIG}
+			fi
+			prevcmd="*"
+		fi
+	else
+		[ "$prevcmd" = "*" ] && echo " */" >>${CONFIG}
+		prevcmd=""
+		case "$cmd" in
+		=)	[ "$branch" = "t" ] && echo "$rest" >>${CONFIG};;
+		:)	[ "$branch" = "t" ] && echo "$raw_input_line" ;;
+		int)	[ "$branch" = "t" ] && int "$rest" ;;
+		bool)	[ "$branch" = "t" ] && bool "$rest" ;;
+		exec)	[ "$branch" = "t" ] && ( sh -c "$rest" ) ;;
+		if)	stack="$branch $stack"
+			if [ "$branch" = "t" ] && eval "$rest"; then
+				branch=t
+			else
+				branch=f
+			fi ;;
+		else)	if [ "$branch" = "t" ]; then
+				branch=f
+			else
+				read branch rest <<-END_OF_STACK
+					$stack
+				END_OF_STACK
+			fi ;;
+		fi)	[ -z "$stack" ] && echo "Error!  Extra fi." 1>&2
+			read branch stack <<-END_OF_STACK
+				$stack
+			END_OF_STACK
+			;;
+		esac
+	fi
+	echo "$raw_input_line" >>config.new
+  done
+  [ "$prevcmd" = "*" ] && echo " */" >>${CONFIG}
+
+  [ -z "$stack" ] || echo "Error!  Untermiated if." 1>&2
+
+  mv config.new config.status
+  exit 0