openpam_log.c revision 236099 
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: openpam_log.c 544 2012-03-31 22:47:15Z des $
36 */
37
38#ifdef HAVE_CONFIG_H
39# include "config.h"
40#endif
41
42#include <errno.h>
43#include <stdarg.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <syslog.h>
47
48#include <security/pam_appl.h>
49
50#include "openpam_impl.h"
51
52#ifdef OPENPAM_DEBUG
53int openpam_debug = 1;
54#else
55int openpam_debug = 0;
56#endif
57
58#if !defined(openpam_log)
59
60/*
61 * OpenPAM extension
62 *
63 * Log a message through syslog
64 */
65
66void
67openpam_log(int level, const char *fmt, ...)
68{
69	va_list ap;
70	int priority;
71
72	switch (level) {
73	case PAM_LOG_LIBDEBUG:
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	int serrno;
104
105	switch (level) {
106	case PAM_LOG_LIBDEBUG:
107	case PAM_LOG_DEBUG:
108		if (!openpam_debug)
109			return;
110		priority = LOG_DEBUG;
111		break;
112	case PAM_LOG_VERBOSE:
113		priority = LOG_INFO;
114		break;
115	case PAM_LOG_NOTICE:
116		priority = LOG_NOTICE;
117		break;
118	case PAM_LOG_ERROR:
119	default:
120		priority = LOG_ERR;
121		break;
122	}
123	va_start(ap, fmt);
124	serrno = errno;
125	if (asprintf(&format, "in %s(): %s", func, fmt) > 0) {
126		errno = serrno;
127		vsyslog(priority, format, ap);
128		FREE(format);
129	} else {
130		errno = serrno;
131		vsyslog(priority, fmt, ap);
132	}
133	va_end(ap);
134}
135
136#endif
137
138/**
139 * The =openpam_log function logs messages using =syslog.
140 * It is primarily intended for internal use by the library and modules.
141 *
142 * The =level argument indicates the importance of the message.
143 * The following levels are defined:
144 *
145 *	=PAM_LOG_LIBDEBUG:
146 *		Debugging messages.
147 *		For internal use only.
148 *	=PAM_LOG_DEBUG:
149 *		Debugging messages.
150 *		These messages are normally not logged unless the global
151 *		integer variable :openpam_debug is set to a non-zero
152 *		value, in which case they are logged with a =syslog
153 *		priority of =LOG_DEBUG.
154 *	=PAM_LOG_VERBOSE:
155 *		Information about the progress of the authentication
156 *		process, or other non-essential messages.
157 *		These messages are logged with a =syslog priority of
158 *		=LOG_INFO.
159 *	=PAM_LOG_NOTICE:
160 *		Messages relating to non-fatal errors.
161 *		These messages are logged with a =syslog priority of
162 *		=LOG_NOTICE.
163 *	=PAM_LOG_ERROR:
164 *		Messages relating to serious errors.
165 *		These messages are logged with a =syslog priority of
166 *		=LOG_ERR.
167 *
168 * The remaining arguments are a =printf format string and the
169 * corresponding arguments.
170 */
171