pam_setenv.c revision 255369 
1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2011 Dag-Erling Sm��rgrav
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 539 2012-03-31 20:53:22Z 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
50/*
51 * OpenPAM extension
52 *
53 * Set the value of an environment variable
54 * Mirrors setenv(3)
55 */
56
57int
58pam_setenv(pam_handle_t *pamh,
59	const char *name,
60	const char *value,
61	int overwrite)
62{
63	char *env;
64	int r;
65
66	ENTER();
67	if (pamh == NULL)
68		RETURNC(PAM_SYSTEM_ERR);
69
70	/* sanity checks */
71	if (name == NULL || value == NULL || strchr(name, '=') != NULL)
72		RETURNC(PAM_SYSTEM_ERR);
73
74	/* is it already there? */
75	if (!overwrite && openpam_findenv(pamh, name, strlen(name)) >= 0)
76		RETURNC(PAM_SUCCESS);
77
78	/* set it... */
79	if (asprintf(&env, "%s=%s", name, value) < 0)
80		RETURNC(PAM_BUF_ERR);
81	r = pam_putenv(pamh, env);
82	FREE(env);
83	RETURNC(r);
84}
85
86/*
87 * Error codes:
88 *
89 *	=pam_putenv
90 *	PAM_SYSTEM_ERR
91 *	PAM_BUF_ERR
92 */
93
94/**
95 * The =pam_setenv function sets an environment variable.
96 * Its semantics are similar to those of =setenv, but it modifies the PAM
97 * context's environment list instead of the application's.
98 *
99 * >pam_getenv
100 * >pam_getenvlist
101 * >pam_putenv
102 */
103