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_getenvlist.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 45
48 *
49 * Returns a list of all the PAM environment variables
50 */
51
52char **
53pam_getenvlist(pam_handle_t *pamh)
54{
55	char **envlist;
56	int i;
57
58	ENTER();
59	if (pamh == NULL)
60		RETURNP(NULL);
61	envlist = malloc(sizeof(char *) * (pamh->env_count + 1));
62	if (envlist == NULL) {
63		openpam_log(PAM_LOG_ERROR, "%s",
64			pam_strerror(pamh, PAM_BUF_ERR));
65		RETURNP(NULL);
66	}
67	for (i = 0; i < pamh->env_count; ++i) {
68		if ((envlist[i] = strdup(pamh->env[i])) == NULL) {
69			while (i) {
70				--i;
71				FREE(envlist[i]);
72			}
73			FREE(envlist);
74			openpam_log(PAM_LOG_ERROR, "%s",
75				pam_strerror(pamh, PAM_BUF_ERR));
76			RETURNP(NULL);
77		}
78	}
79	envlist[i] = NULL;
80	RETURNP(envlist);
81}
82
83/**
84 * The =pam_getenvlist function returns a copy of the given PAM context's
85 * environment list as a pointer to an array of strings.
86 * The last element in the array is =NULL.
87 * The pointer is suitable for assignment to {Va environ}.
88 *
89 * The array and the strings it lists are allocated using =malloc, and
90 * should be released using =free after use:
91 *
92 *     char **envlist, **env;
93 *
94 *     envlist = environ;
95 *     environ = pam_getenvlist(pamh);
96 *     \/\* do something nifty \*\/
97 *     for (env = environ; *env != NULL; env++)
98 *         free(*env);
99 *     free(environ);
100 *     environ = envlist;
101 *
102 * >environ 7
103 * >pam_getenv
104 * >pam_putenv
105 * >pam_setenv
106 * >pam_unsetenv
107 */
108