source: openpam/trunk/lib/openpam_log.c @ 437

Last change on this file since 437 was 437, checked in by Dag-Erling Smørgrav, 8 years ago

Update copyright and release notes.

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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: openpam_log.c 437 2011-09-13 12:00:13Z des $
36 */
37
38#ifdef HAVE_CONFIG_H
39# include "config.h"
40#endif
41
42#include <ctype.h>
43#include <stdarg.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <string.h>
47#include <syslog.h>
48
49#include <security/pam_appl.h>
50
51#include "openpam_impl.h"
52
53#ifdef OPENPAM_DEBUG
54int openpam_debug = 1;
55#else
56int openpam_debug = 0;
57#endif
58
59#if !defined(openpam_log)
60
61/*
62 * OpenPAM extension
63 *
64 * Log a message through syslog
65 */
66
67void
68openpam_log(int level, const char *fmt, ...)
69{
70        va_list ap;
71        int priority;
72
73        switch (level) {
74        case PAM_LOG_DEBUG:
75                if (!openpam_debug)
76                        return;
77                priority = LOG_DEBUG;
78                break;
79        case PAM_LOG_VERBOSE:
80                priority = LOG_INFO;
81                break;
82        case PAM_LOG_NOTICE:
83                priority = LOG_NOTICE;
84                break;
85        case PAM_LOG_ERROR:
86        default:
87                priority = LOG_ERR;
88                break;
89        }
90        va_start(ap, fmt);
91        vsyslog(priority, fmt, ap);
92        va_end(ap);
93}
94
95#else
96
97void
98_openpam_log(int level, const char *func, const char *fmt, ...)
99{
100        va_list ap;
101        char *format;
102        int priority;
103
104        switch (level) {
105        case PAM_LOG_DEBUG:
106                if (!openpam_debug)
107                        return;
108                priority = LOG_DEBUG;
109                break;
110        case PAM_LOG_VERBOSE:
111                priority = LOG_INFO;
112                break;
113        case PAM_LOG_NOTICE:
114                priority = LOG_NOTICE;
115                break;
116        case PAM_LOG_ERROR:
117        default:
118                priority = LOG_ERR;
119                break;
120        }
121        va_start(ap, fmt);
122        if (asprintf(&format, "in %s(): %s", func, fmt) > 0) {
123                vsyslog(priority, format, ap);
124                FREE(format);
125        } else {
126                vsyslog(priority, fmt, ap);
127        }
128        va_end(ap);
129}
130
131#endif
132
133/**
134 * The =openpam_log function logs messages using =syslog.
135 * It is primarily intended for internal use by the library and modules.
136 *
137 * The =level argument indicates the importance of the message.
138 * The following levels are defined:
139 *
140 *      =PAM_LOG_DEBUG:
141 *              Debugging messages.
142 *              These messages are normally not logged unless the global
143 *              integer variable :openpam_debug is set to a non-zero
144 *              value, in which case they are logged with a =syslog
145 *              priority of =LOG_DEBUG.
146 *      =PAM_LOG_VERBOSE:
147 *              Information about the progress of the authentication
148 *              process, or other non-essential messages.
149 *              These messages are logged with a =syslog priority of
150 *              =LOG_INFO.
151 *      =PAM_LOG_NOTICE:
152 *              Messages relating to non-fatal errors.
153 *              These messages are logged with a =syslog priority of
154 *              =LOG_NOTICE.
155 *      =PAM_LOG_ERROR:
156 *              Messages relating to serious errors.
157 *              These messages are logged with a =syslog priority of
158 *              =LOG_ERR.
159 *
160 * The remaining arguments are a =printf format string and the
161 * corresponding arguments.
162 */
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