pam_setenv.c revision 91684 
1/*-
2 * Copyright (c) 2002 Networks Associates Technologies, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by ThinkSec AS and
6 * NAI Labs, the Security Research Division of Network Associates, Inc.
7 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
8 * 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_setenv.c#5 $
35 */
36
37#include <stdlib.h>
38#include <stdio.h>
39#include <string.h>
40
41#include <security/pam_appl.h>
42
43#include "openpam_impl.h"
44
45/*
46 * OpenPAM extension
47 *
48 * Set the value of an environment variable
49 * Mirrors setenv(3)
50 */
51
52int
53pam_setenv(pam_handle_t *pamh,
54	const char *name,
55	const char *value,
56	int overwrite)
57{
58	char *env;
59	int r;
60
61	if (pamh == NULL)
62		return (PAM_SYSTEM_ERR);
63
64	/* sanity checks */
65	if (name == NULL || value == NULL || strchr(name, '=') != NULL)
66		return (PAM_SYSTEM_ERR);
67
68	/* is it already there? */
69	if (!overwrite && openpam_findenv(pamh, name, strlen(name)) != -1)
70		return (PAM_SUCCESS);
71
72	/* set it... */
73	if ((env = malloc(strlen(name) + strlen(value) + 2)) == NULL)
74		return (PAM_BUF_ERR);
75	sprintf(env, "%s=%s", name, value);
76	r = pam_putenv(pamh, env);
77	free(env);
78	return (r);
79}
80
81/*
82 * Error codes:
83 *
84 *	=pam_putenv
85 *	PAM_SYSTEM_ERR
86 *	PAM_BUF_ERR
87 */
88
89/**
90 * The =pam_setenv function sets a environment variable.
91 * Its semantics are similar to those of =setenv, but it modifies the PAM
92 * context's environment list instead of the application's.
93 *
94 * >pam_getenv
95 * >pam_getenvlist
96 * >pam_putenv
97 */
98