source: openpam/trunk/lib/libpam/pam_putenv.c @ 914

Last change on this file since 914 was 914, checked in by Dag-Erling Smørgrav, 4 years ago

In pam_*env(3), set errno as the corresponding POSIX functions would.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 3.3 KB
Line 
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_putenv.c 914 2017-01-21 15:15:29Z des $
36 */
37
38#ifdef HAVE_CONFIG_H
39# include "config.h"
40#endif
41
42#include <errno.h>
43#include <stdlib.h>
44#include <string.h>
45
46#include <security/pam_appl.h>
47
48#include "openpam_impl.h"
49
50/*
51 * XSSO 4.2.1
52 * XSSO 6 page 56
53 *
54 * Set the value of an environment variable
55 */
56
57int
58pam_putenv(pam_handle_t *pamh,
59        const char *namevalue)
60{
61        char **env, *p;
62        size_t env_size;
63        int i;
64
65        ENTER();
66
67        /* sanity checks */
68        if ((p = strchr(namevalue, '=')) == NULL) {
69                errno = EINVAL;
70                RETURNC(PAM_SYSTEM_ERR);
71        }
72
73        /* see if the variable is already in the environment */
74        if ((i = openpam_findenv(pamh, namevalue, p - namevalue)) >= 0) {
75                if ((p = strdup(namevalue)) == NULL)
76                        RETURNC(PAM_BUF_ERR);
77                FREE(pamh->env[i]);
78                pamh->env[i] = p;
79                RETURNC(PAM_SUCCESS);
80        }
81
82        /* grow the environment list if necessary */
83        if (pamh->env_count == pamh->env_size) {
84                env_size = pamh->env_size * 2 + 1;
85                env = realloc(pamh->env, sizeof(char *) * env_size);
86                if (env == NULL)
87                        RETURNC(PAM_BUF_ERR);
88                pamh->env = env;
89                pamh->env_size = env_size;
90        }
91
92        /* add the variable at the end */
93        if ((pamh->env[pamh->env_count] = strdup(namevalue)) == NULL)
94                RETURNC(PAM_BUF_ERR);
95        ++pamh->env_count;
96        RETURNC(PAM_SUCCESS);
97}
98
99/*
100 * Error codes:
101 *
102 *      PAM_SYSTEM_ERR
103 *      PAM_BUF_ERR
104 */
105
106/**
107 * The =pam_putenv function sets an environment variable.
108 * Its semantics are similar to those of =putenv, but it modifies the PAM
109 * context's environment list instead of the application's.
110 *
111 * >pam_getenv
112 * >pam_getenvlist
113 * >pam_setenv
114 */
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