contrib/openpam/lib/openpam_log.c

   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
  48 int _openpam_debug = 0;
  49
  50 #if !defined(openpam_log)
  51
  52 /*
  53  * OpenPAM extension
  54  *
  55  * Log a message through syslog
  56  */
  57
  58 void
  59 openpam_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
  88 void
  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  */