source: openpam/trunk/lib/pam_end.c @ 232

Last change on this file since 232 was 232, checked in by Dag-Erling Smørgrav, 14 years ago

With one single exception (where the pointer is obviously being
immediately overwritten), replace all use of free(3) with a macro
that clears the pointer after freeing the memory it pointed to.

Suggested by: Dmitry V. Levin <ldv@…>

File size: 2.9 KB
Line 
1/*-
2 * Copyright (c) 2002 Networks Associates Technology, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by ThinkSec AS and
6 * Network Associates Laboratories, the Security Research Division of
7 * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
8 * ("CBOSS"), as part of the 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_end.c#12 $
35 */
36
37#include <stdlib.h>
38
39#include <security/pam_appl.h>
40
41#include "openpam_impl.h"
42
43/*
44 * XSSO 4.2.1
45 * XSSO 6 page 42
46 *
47 * Terminate the PAM transaction
48 */
49
50int
51pam_end(pam_handle_t *pamh,
52        int status)
53{
54        pam_data_t *dp;
55        int i;
56
57        ENTER();
58        if (pamh == NULL)
59                RETURNC(PAM_SYSTEM_ERR);
60
61        /* clear module data */
62        while ((dp = pamh->module_data) != NULL) {
63                if (dp->cleanup)
64                        (dp->cleanup)(pamh, dp->data, status);
65                pamh->module_data = dp->next;
66                FREE(dp->name);
67                FREE(dp);
68        }
69
70        /* clear environment */
71        while (pamh->env_count)
72                FREE(pamh->env[--pamh->env_count]);
73        FREE(pamh->env);
74
75        /* clear chains */
76        openpam_clear_chains(pamh->chains);
77
78        /* clear items */
79        for (i = 0; i < PAM_NUM_ITEMS; ++i)
80                pam_set_item(pamh, i, NULL);
81
82        FREE(pamh);
83
84        RETURNC(PAM_SUCCESS);
85}
86
87/*
88 * Error codes:
89 *
90 *      PAM_SYSTEM_ERR
91 */
92
93/**
94 * The =pam_end function terminates a PAM transaction and destroys the
95 * corresponding PAM context, releasing all resources allocated to it.
96 *
97 * The =status argument should be set to the error code returned by the
98 * last API call before the call to =pam_end.
99 */
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