1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2007 Dag-Erling Smørgrav
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by ThinkSec AS and
7 * Network Associates Laboratories, the Security Research Division of
8 * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
9 * ("CBOSS"), as part of the DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote
20 *    products derived from this software without specific prior written
21 *    permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * $Id: pam_getenv.c 408 2007-12-21 11:36:24Z des $
36 */
37
38#include <stdlib.h>
39#include <string.h>
40
41#include <security/pam_appl.h>
42
43#include "openpam_impl.h"
44
45/*
46 * XSSO 4.2.1
47 * XSSO 6 page 44
48 *
49 * Retrieve the value of a PAM environment variable
50 */
51
52const char *
53pam_getenv(pam_handle_t *pamh,
54	const char *name)
55{
56	char *str;
57	int i;
58
59	ENTERS(name);
60	if (pamh == NULL)
61		RETURNS(NULL);
62	if (name == NULL || strchr(name, '=') != NULL)
63		RETURNS(NULL);
64	if ((i = openpam_findenv(pamh, name, strlen(name))) < 0)
65		RETURNS(NULL);
66	for (str = pamh->env[i]; *str != '\0'; ++str) {
67		if (*str == '=') {
68			++str;
69			break;
70		}
71	}
72	RETURNS(str);
73}
74
75/**
76 * The =pam_getenv function returns the value of an environment variable.
77 * Its semantics are similar to those of =getenv, but it accesses the PAM
78 * context's environment list instead of the application's.
79 *
80 * >pam_getenvlist
81 * >pam_putenv
82 * >pam_setenv
83 * >pam_unsetenv
84 */
85