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 1.3 2002/03/10 04:15:33 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)
38 "Returns an environment variable, or NIL if it does not exist"
39 (check-type key string)
40 (uffi:with-c-string (key-native key)
41 (let ((value-c-string (c-getenv key-native)))
42 (uffi:convert-from-c-string value-c-string))))
44 (format t "~&Environment value for USER key: ~A" (getenv "USER"))
45 (format t "~&Environment value for _FOO_ key: ~A" (getenv "_FOO_"))
49 (flet ((print-results (str)
50 (format t "~&(getenv ~S) => ~S" str (getenv str))))
51 (print-results "USER")
52 (print-results "_FOO_")))