EventLog.cpp

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/******************************************************************************
** Copyright © 2002 by J.M.McGuiness, coder@hussar.me.uk
**
** This library is free software; you can redistribute it and/or
** modify it under the terms of the GNU Lesser General Public
** License as published by the Free Software Foundation; either
** version 2.1 of the License, or (at your option) any later version.
**
** This library is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public
** License along with this library; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
 
#include "stdafx.h"
 
#include "EventLog.hpp"
 
#include "../../../core/exception.hpp"
 
using namespace libjmmcg;
using namespace libNTUtils;
 
/////////////////////////////////////////////////////////////////////////////
 
JMMCG_REVISION_CONSTANT(_T(LIBJMMCG_VERSION_NUMBER))
 
/////////////////////////////////////////////////////////////////////////////
 
namespace {
   const TCHAR *error_msgs[]={
      _T("Event log error."),
      _T("Failed to register event log source."),
      _T("Failed to get module name."),
      _T("Failed to log event: ")
   };
}
 
// NOTE: This string is the embedded name of this dll!!! Don't change it!!!
// I need this because I can't get the name of this dll at run-time.
// "GetModuleHandle(...)" gives the name of the calling process if NULL is
// supplied which is not what I want.
const TCHAR module_name[]=_T("ntutils");
// More constants....
const TCHAR event_log_reg_path[]=_T("SYSTEM\\CurrentControlSet\\Services\\EventLog\\");
const TCHAR event_msg_file_str[]=_T("EventMessageFile");
const TCHAR event_types_supported_str[]=_T("TypesSupported");
 
/////////////////////////////////////////////////////////////////////////////
 
inline
EventLog::EventLog(const tstring &event_src_name, const unsigned int types, const tstring &server, const tstring &appln_log) : event_src( NULL ) {
   Create(event_src_name, types, server, appln_log);
}
 
inline
void EventLog::Create(const tstring &event_src_name, const unsigned int types, const tstring &server, const tstring &appln_log) {
   if (key.Create(HKEY_LOCAL_MACHINE, event_log_reg_path + appln_log + _T("\\") + event_src_name)==ERROR_SUCCESS) {
      TCHAR mod_name[MAX_PATH];
      if (GetModuleFileName(GetModuleHandle(module_name), mod_name, MAX_PATH)) {
         key.SetValue(mod_name, event_msg_file_str);
         key.SetValue(static_cast<unsigned long>(types), event_types_supported_str);
         if (!(event_src=::RegisterEventSource(server.c_str(), event_src_name.c_str()))) {
            info::function fn(__LINE__,__PRETTY_FUNCTION__,typeid(&EventLog::Create),info::function::argument(_T("const tstring &event_src_name"),event_src_name));
            fn.add_arg(_T("const unsigned int types"),tostring(types));
            fn.add_arg(_T("const tstring &server"),server);
            fn.add_arg(_T("const tstring &appln_log"),appln_log);
            throw exception_type(error_msgs[1],fn,__REV_INFO__);
         }
         assert(event_src);
      } else {
         info::function fn(__LINE__,__PRETTY_FUNCTION__,typeid(&EventLog::Create),info::function::argument(_T("const tstring &event_src_name"),event_src_name));
         fn.add_arg(_T("const unsigned int types"),tostring(types));
         fn.add_arg(_T("const tstring &server"),server);
         fn.add_arg(_T("const tstring &appln_log"),appln_log);
         throw exception_type(error_msgs[2],fn,__REV_INFO__);
      }
   }
}
 
inline
void EventLog::Log(const error_types wType, const categories wCategory, const tstring &str, const unsigned long dwDataSize, void * const lpRawData, SID * const lpUserSid) {
   assert(event_src);
   const TCHAR *tmp=str.c_str();
   if (!::ReportEvent(event_src, (WORD)wType, (WORD)wCategory, DEFAULT_MSG, lpUserSid, 1, dwDataSize, &tmp, lpRawData)) {
      info::function fn(__LINE__,__PRETTY_FUNCTION__,typeid(&EventLog::Log),info::function::argument(_T("const error_types wType"),tostring(wType)));
      fn.add_arg(_T("const categories wCategory"),tostring(wCategory));
      fn.add_arg(_T("const tstring &str"),str);
      fn.add_arg(_T("const unsigned long dwDataSize"),tostring(dwDataSize));
      fn.add_arg(_T("void * const lpRawData"),tostring(lpRawData));
      fn.add_arg(_T("SID * const lpUserSid"),tostring(lpUserSid));
      throw exception_type(error_msgs[3],fn,__REV_INFO__);
   }
}