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+;;;; Copyright (C) 2000 Free Software Foundation, Inc.
+;;;;
+;;;; 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, or (at your option)
+;;;; any later version.
+;;;;
+;;;; This program is distributed in the hope that it will be useful,
+;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;;; GNU General Public License for more details.
+;;;;
+;;;; You should have received a copy of the GNU General Public License
+;;;; along with this software; see the file COPYING. If not, write to
+;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+;;;; Boston, MA 02111-1307 USA
+;;;;
+
+;;;; Safe subset of R5RS bindings
+
+(define-module (ice-9 safe))
+
+(define safe-r5rs-interface (resolve-interface '(ice-9 safe-r5rs)))
+
+(define-public (safe-environment n)
+ (if (not (= n 5))
+ (scm-error 'misc-error 'safe-environment
+ "~A is not a valid version"
+ (list n)
+ '()))
+ safe-r5rs-interface)