1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2011 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_setenv.c 648 2013-03-05 17:54:27Z des $
36 */
37
38#ifdef HAVE_CONFIG_H
39# include "config.h"
40#endif
41
42#include <stdlib.h>
43#include <stdio.h>
44#include <string.h>
45
46#include <security/pam_appl.h>
47
48#include "openpam_impl.h"
49#include "openpam_asprintf.h"
50
51/*
52 * OpenPAM extension
53 *
54 * Set the value of an environment variable
55 * Mirrors setenv(3)
56 */
57
58int
59pam_setenv(pam_handle_t *pamh,
60	const char *name,
61	const char *value,
62	int overwrite)
63{
64	char *env;
65	int r;
66
67	ENTER();
68	if (pamh == NULL)
69		RETURNC(PAM_SYSTEM_ERR);
70
71	/* sanity checks */
72	if (name == NULL || value == NULL || strchr(name, '=') != NULL)
73		RETURNC(PAM_SYSTEM_ERR);
74
75	/* is it already there? */
76	if (!overwrite && openpam_findenv(pamh, name, strlen(name)) >= 0)
77		RETURNC(PAM_SUCCESS);
78
79	/* set it... */
80	if (asprintf(&env, "%s=%s", name, value) < 0)
81		RETURNC(PAM_BUF_ERR);
82	r = pam_putenv(pamh, env);
83	FREE(env);
84	RETURNC(r);
85}
86
87/*
88 * Error codes:
89 *
90 *	=pam_putenv
91 *	PAM_SYSTEM_ERR
92 *	PAM_BUF_ERR
93 */
94
95/**
96 * The =pam_setenv function sets an environment variable.
97 * Its semantics are similar to those of =setenv, but it modifies the PAM
98 * context's environment list instead of the application's.
99 *
100 * >pam_getenv
101 * >pam_getenvlist
102 * >pam_putenv
103 */
104