dist/openpam/lib/openpam_log.c

   1 /*-
   2  * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
   3  * Copyright (c) 2004-2007 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,v 1.1.1.3 2008/01/27 00:54:52 christos Exp $
  36  */
  37
  38 #include <ctype.h>
  39 #include <stdarg.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <syslog.h>
  44
  45 #include <security/pam_appl.h>
  46
  47 #include "openpam_impl.h"
  48
  49 #ifdef OPENPAM_DEBUG
  50 int _openpam_debug = 1;
  51 #else
  52 int _openpam_debug = 0;
  53 #endif
  54
  55 #if !defined(openpam_log)
  56
  57 /*
  58  * OpenPAM extension
  59  *
  60  * Log a message through syslog
  61  */
  62
  63 void
  64 openpam_log(int level, const char *fmt, ...)
  65 {
  66         va_list ap;
  67         int priority;
  68
  69         switch (level) {
  70         case PAM_LOG_DEBUG:
  71                 if (!_openpam_debug)
  72                         return;
  73                 priority = LOG_DEBUG;
  74                 break;
  75         case PAM_LOG_VERBOSE:
  76                 priority = LOG_INFO;
  77                 break;
  78         case PAM_LOG_NOTICE:
  79                 priority = LOG_NOTICE;
  80                 break;
  81         case PAM_LOG_ERROR:
  82         default:
  83                 priority = LOG_ERR;
  84                 break;
  85         }
  86         va_start(ap, fmt);
  87         vsyslog(priority, fmt, ap);
  88         va_end(ap);
  89 }
  90
  91 #else
  92
  93 void
  94 _openpam_log(int level, const char *func, const char *fmt, ...)
  95 {
  96         va_list ap;
  97         char *format;
  98         int priority;
  99
 100         switch (level) {
 101         case PAM_LOG_DEBUG:
 102                 if (!_openpam_debug)
 103                         return;
 104                 priority = LOG_DEBUG;
 105                 break;
 106         case PAM_LOG_VERBOSE:
 107                 priority = LOG_INFO;
 108                 break;
 109         case PAM_LOG_NOTICE:
 110                 priority = LOG_NOTICE;
 111                 break;
 112         case PAM_LOG_ERROR:
 113         default:
 114                 priority = LOG_ERR;
 115                 break;
 116         }
 117         va_start(ap, fmt);
 118         if (asprintf(&format, "in %s(): %s", func, fmt) > 0) {
 119                 vsyslog(priority, format, ap);
 120                 FREE(format);
 121         } else {
 122                 vsyslog(priority, fmt, ap);
 123         }
 124         va_end(ap);
 125 }
 126
 127 #endif
 128
 129 /**
 130  * The =openpam_log function logs messages using =syslog.
 131  * It is primarily intended for internal use by the library and modules.
 132  *
 133  * The =level argument indicates the importance of the message.
 134  * The following levels are defined:
 135  *
 136  *      =PAM_LOG_DEBUG:
 137  *              Debugging messages.
 138  *              These messages are normally not logged unless the global
 139  *              integer variable :_openpam_debug is set to a non-zero
 140  *              value, in which case they are logged with a =syslog
 141  *              priority of =LOG_DEBUG.
 142  *      =PAM_LOG_VERBOSE:
 143  *              Information about the progress of the authentication
 144  *              process, or other non-essential messages.
 145  *              These messages are logged with a =syslog priority of
 146  *              =LOG_INFO.
 147  *      =PAM_LOG_NOTICE:
 148  *              Messages relating to non-fatal errors.
 149  *              These messages are logged with a =syslog priority of
 150  *              =LOG_NOTICE.
 151  *      =PAM_LOG_ERROR:
 152  *              Messages relating to serious errors.
 153  *              These messages are logged with a =syslog priority of
 154  *              =LOG_ERR.
 155  *
 156  * The remaining arguments are a =printf format string and the
 157  * corresponding arguments.
 158  */