openpam_log.c revision 141098 
1/*-
2 * Copyright (c) 2002-2003 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/openpam_log.c#24 $
35 */
36
37#include <ctype.h>
38#include <stdarg.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <syslog.h>
43
44#include <security/pam_appl.h>
45
46#include "openpam_impl.h"
47
48int _openpam_debug = 0;
49
50#if !defined(openpam_log)
51
52/*
53 * OpenPAM extension
54 *
55 * Log a message through syslog
56 */
57
58void
59openpam_log(int level, const char *fmt, ...)
60{
61	va_list ap;
62	int priority;
63
64	switch (level) {
65	case PAM_LOG_DEBUG:
66		if (!_openpam_debug)
67			return;
68		priority = LOG_DEBUG;
69		break;
70	case PAM_LOG_VERBOSE:
71		priority = LOG_INFO;
72		break;
73	case PAM_LOG_NOTICE:
74		priority = LOG_NOTICE;
75		break;
76	case PAM_LOG_ERROR:
77	default:
78		priority = LOG_ERR;
79		break;
80	}
81	va_start(ap, fmt);
82	vsyslog(priority, fmt, ap);
83	va_end(ap);
84}
85
86#else
87
88void
89_openpam_log(int level, const char *func, const char *fmt, ...)
90{
91	va_list ap;
92	char *format;
93	int priority;
94
95	switch (level) {
96	case PAM_LOG_DEBUG:
97		if (!_openpam_debug)
98			return;
99		priority = LOG_DEBUG;
100		break;
101	case PAM_LOG_VERBOSE:
102		priority = LOG_INFO;
103		break;
104	case PAM_LOG_NOTICE:
105		priority = LOG_NOTICE;
106		break;
107	case PAM_LOG_ERROR:
108	default:
109		priority = LOG_ERR;
110		break;
111	}
112	va_start(ap, fmt);
113	if (asprintf(&format, "in %s(): %s", func, fmt) > 0) {
114		vsyslog(priority, format, ap);
115		FREE(format);
116	} else {
117		vsyslog(priority, fmt, ap);
118	}
119	va_end(ap);
120}
121
122#endif
123
124/**
125 * The =openpam_log function logs messages using =syslog.
126 * It is primarily intended for internal use by the library and modules.
127 *
128 * The =level argument indicates the importance of the message.
129 * The following levels are defined:
130 *
131 *	=PAM_LOG_DEBUG:
132 *		Debugging messages.
133 *		These messages are normally not logged unless the global
134 *		integer variable :_openpam_debug is set to a non-zero
135 *		value, in which case they are logged with a =syslog
136 *		priority of =LOG_DEBUG.
137 *	=PAM_LOG_VERBOSE:
138 *		Information about the progress of the authentication
139 *		process, or other non-essential messages.
140 *		These messages are logged with a =syslog priority of
141 *		=LOG_INFO.
142 *	=PAM_LOG_NOTICE:
143 *		Messages relating to non-fatal errors.
144 *		These messages are logged with a =syslog priority of
145 *		=LOG_NOTICE.
146 *	=PAM_LOG_ERROR:
147 *		Messages relating to serious errors.
148 *		These messages are logged with a =syslog priority of
149 *		=LOG_ERR.
150 *
151 * The remaining arguments are a =printf format string and the
152 * corresponding arguments.
153 */
154