pam_getenv.c revision 115619 
1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by ThinkSec AS and
6 * Network Associates Laboratories, the Security Research Division of
7 * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
8 * ("CBOSS"), as part of the DARPA CHATS research program.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote
19 *    products derived from this software without specific prior written
20 *    permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $P4: //depot/projects/openpam/lib/pam_getenv.c#16 $
35 */
36
37#include <stdlib.h>
38#include <string.h>
39
40#include <security/pam_appl.h>
41
42#include "openpam_impl.h"
43
44/*
45 * XSSO 4.2.1
46 * XSSO 6 page 44
47 *
48 * Retrieve the value of a PAM environment variable
49 */
50
51const char *
52pam_getenv(pam_handle_t *pamh,
53	const char *name)
54{
55	char *str;
56	int i;
57
58	ENTERS(name);
59	if (pamh == NULL)
60		RETURNS(NULL);
61	if (name == NULL || strchr(name, '=') != NULL)
62		RETURNS(NULL);
63	if ((i = openpam_findenv(pamh, name, strlen(name))) < 0)
64		RETURNS(NULL);
65	for (str = pamh->env[i]; *str != '\0'; ++str) {
66		if (*str == '=') {
67			++str;
68			break;
69		}
70	}
71	RETURNS(str);
72}
73
74/**
75 * The =pam_getenv function returns the value of an environment variable.
76 * Its semantics are similar to those of =getenv, but it accesses the PAM
77 * context's environment list instead of the application's.
78 *
79 * >pam_getenvlist
80 * >pam_putenv
81 * >pam_setenv
82 */
83