openpam_log.c revision 228690
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 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 */ 163