1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
6 ;;;; Purpose: UFFI Example file to get environment variable
7 ;;;; Programmer: Kevin M. Rosenberg
8 ;;;; Date Started: Mar 2002
10 ;;;; Copyright (c) 2002 Kevin M. Rosenberg
12 ;;;; $Id: getenv.cl,v 1.6 2002/03/10 17:42:35 kevin Exp $
14 ;;;; This file is part of UFFI.
16 ;;;; UFFI is free software; you can redistribute it and/or modify
17 ;;;; it under the terms of the GNU General Public License (version 2) as
18 ;;;; published by the Free Software Foundation.
20 ;;;; UFFI is distributed in the hope that it will be useful,
21 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
22 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 ;;;; GNU General Public License for more details.
25 ;;;; You should have received a copy of the GNU General Public License
26 ;;;; along with UFFI; if not, write to the Free Software Foundation, Inc.,
27 ;;;; 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 ;;;; *************************************************************************
33 (uffi:def-function ("getenv" c-getenv)
37 (defun my-getenv (key)
38 "Returns an environment variable, or NIL if it does not exist"
39 (check-type key string)
40 (uffi:with-cstring (key-native key)
41 (uffi:convert-from-cstring (c-getenv key-native))))
45 (flet ((print-results (str)
46 (format t "~&(getenv ~S) => ~S" str (my-getenv str))))
47 (print-results "USER")
48 (print-results "_FOO_")))