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/*++
Copyright (c) 1996-1997 Microsoft Corporation
Module Name: eventlog.cxx
Abstract:
This module defines the generic class for logging events.
Author:
Murali R. Krishnan (MuraliK) 28-Sept-1994
Depends Upon: Internet Services Platform Library (isplat.lib) Internet Services Debugging Library (isdebug.lib)
--*/
#include "precomp.hxx"
//
// Include Headers
//
#define DLL_IMPLEMENTATION
#define IMPLEMENTATION_EXPORT
# include <isplat.h>
# include <dbgutil.h>
# include <eventlog.hxx>
# include <string.hxx>
#define EVENTLOG_KEY \
"SYSTEM\\CurrentControlSet\\Services\\EventLog\\System\\"
#define EVENTLOG_VALUE_KEY "EventMessageFile"
EVENT_LOG::EVENT_LOG( IN LPCTSTR lpszSource )/*++
Description Constructor function for given event log object. Initializes event logging services.
Arguments:
lpszSource: Source string for the Event.
Note:
This is intended to be executed once only. This is not to be used for creating multiple event log handles for same given source name. But can be used for creating EVENT_LOG objects for different source names.
--*/: m_ErrorCode (NO_ERROR), m_pDateTimeCache (NULL), m_hLogFile (INVALID_HANDLE_VALUE){
(VOID)IISGetPlatformType();
IF_DEBUG( INIT_CLEAN) { DBGPRINTF( ( DBG_CONTEXT, " Initializing Event Log for %s[%p] fLogFile[%x]\n", lpszSource, this, TsIsWindows95())); }
//
// Register as an event source.
//
if ( TsIsWindows95() ) {
m_hEventSource = RegisterEventSourceChicagoStyle( lpszSource, &m_hLogFile ); } else {
m_hEventSource = RegisterEventSource( NULL, lpszSource); }
if ( m_hEventSource != NULL ) {
//
// Success!
//
IF_DEBUG( ERROR) { DBGPRINTF( ( DBG_CONTEXT, " Event Log for %s initialized (hEventSource=%p)\n", lpszSource, m_hEventSource)); } } else {
DBG_ASSERT(m_hLogFile == INVALID_HANDLE_VALUE);
//
// An Error in initializing the event log.
//
m_ErrorCode = GetLastError(); DBGPRINTF( ( DBG_CONTEXT, "Could not register event source (%s) ( Error %lu)\n", lpszSource, m_ErrorCode)); }
return;
} // EVENT_LOG::EVENT_LOG()
EVENT_LOG::~EVENT_LOG( VOID )/*++
Description: Destructor function for given EVENT_LOG object. Terminates event logging functions and closes event log handle
--*/{
IF_DEBUG( INIT_CLEAN) { DBGPRINTF( ( DBG_CONTEXT, "Terminating events logging[%p] fFile[%x]\n", this, TsIsWindows95() )); }
if ( TsIsWindows95() ) {
if ( m_hLogFile != INVALID_HANDLE_VALUE ) { FlushFileBuffers(m_hLogFile); DBG_REQUIRE(CloseHandle( m_hLogFile )); m_hLogFile = INVALID_HANDLE_VALUE; }
if ( m_pDateTimeCache != NULL ) { delete m_pDateTimeCache; m_pDateTimeCache = NULL; }
} else {
//
// If there is a valid Events handle, deregister it
//
if ( m_hEventSource != NULL) {
BOOL fSuccess;
fSuccess = DeregisterEventSource( m_hEventSource);
if ( !fSuccess) {
//
// An Error in DeRegistering
//
m_ErrorCode = GetLastError();
IF_DEBUG( INIT_CLEAN) {
DBGPRINTF( ( DBG_CONTEXT, "Termination of EventLog[%p] failed." " error %lu\n", this, m_ErrorCode)); } }
//
// Reset the handle's value. Just as a precaution
//
m_hEventSource = NULL; } }
IF_DEBUG( API_EXIT) { DBGPRINTF( ( DBG_CONTEXT, "Terminated events log[%p]\n",this)); }
} /* EVENT_LOG::~EVENT_LOG() */
VOIDEVENT_LOG::LogEvent( IN DWORD idMessage, IN WORD nSubStrings, IN const CHAR * rgpszSubStrings[], IN DWORD errCode)/*++
Description: Log an event to the event logger
Arguments:
idMessage Identifies the event message
nSubStrings Number of substrings to include in this message. (Maybe 0)
rgpszSubStrings array of substrings included in the message (Maybe NULL if nSubStrings == 0)
errCode An error code from Win32 or WinSock or NT_STATUS. If this is not Zero, it is considered as "raw" data to be included in message
Returns:
None
--*/{
WORD wType; // Type of Event to be logged
//
// Find type of message for the event log
//
IF_DEBUG( API_ENTRY) {
DWORD i;
DBGPRINTF( ( DBG_CONTEXT, "reporting event %08lX, Error Code = %lu\n", idMessage, errCode ));
for( i = 0 ; i < nSubStrings ; i++ ) { DBGPRINTF(( DBG_CONTEXT, " substring[%lu] = %s\n", i, rgpszSubStrings[i] )); } }
if ( NT_INFORMATION( idMessage)) {
wType = EVENTLOG_INFORMATION_TYPE;
} else {
if ( NT_WARNING( idMessage)) {
wType = EVENTLOG_WARNING_TYPE;
} else {
wType = EVENTLOG_ERROR_TYPE;
DBG_ASSERT(NT_ERROR( idMessage)); } }
//
// Log the event
//
EVENT_LOG::LogEventPrivate( idMessage, wType, nSubStrings, rgpszSubStrings, errCode);
return;
} /* EVENT_LOG::LogEvent() */
//
// Private functions.
//
VOIDEVENT_LOG::LogEventPrivate( IN DWORD idMessage, IN WORD wEventType, IN WORD nSubStrings, IN const CHAR * apszSubStrings[], IN DWORD errCode )/*++
Description: Log an event to the event logger. ( Private version, includes EventType)
Arguments:
idMessage Identifies the event message
wEventType Specifies the severety of the event (error, warning, or informational).
nSubStrings Number of substrings to include in this message. (Maybe 0)
apszSubStrings array of substrings included in the message (Maybe NULL if nSubStrings == 0)
errCode An error code from Win32 or WinSock or NT_STATUS. If this is not Zero, it is considered as "raw" data to be included in message
Returns:
None
--*/{ VOID * pRawData = NULL; DWORD cbRawData = 0; BOOL fReport; DWORD dwErr;
if ( m_hEventSource == NULL ) {
IF_DEBUG(ERROR) { DBGPRINTF((DBG_CONTEXT,"Attempt to log with no event source\n")); } return; }
ASSERT( (nSubStrings == 0) || (apszSubStrings != NULL));
if( errCode != 0 ) { pRawData = &errCode; cbRawData = sizeof(errCode); }
m_ErrorCode = NO_ERROR; dwErr = GetLastError();
if ( TsIsWindows95() ) { fReport = ReportEventChicagoStyle( m_hEventSource, m_hLogFile, idMessage, apszSubStrings, errCode );
} else {
fReport = ReportEvent( m_hEventSource, // hEventSource
wEventType, // fwEventType
0, // fwCategory
idMessage, // IDEvent
NULL, // pUserSid,
nSubStrings, // cStrings
cbRawData, // cbData
(LPCTSTR *) apszSubStrings, // plpszStrings
pRawData ); // lpvData
#ifdef DBG
//
// Output the event log to the debugger
//
CHAR buffer[MAX_PATH+1]; PCHAR pBuffer = buffer;
::FormatMessageA(FORMAT_MESSAGE_MAX_WIDTH_MASK | FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_ARGUMENT_ARRAY, m_hEventSource, idMessage, 0, (LPSTR)pBuffer, (DWORD)sizeof(buffer), (va_list*)apszSubStrings );
DBGPRINTF((DBG_CONTEXT,"Reporting EVENT_LOG Event - %s\n", buffer));
#endif
}
if ( !fReport ) {
IF_DEBUG( ERROR) {
m_ErrorCode = GetLastError(); DBGPRINTF(( DBG_CONTEXT, "Cannot report event for %p, error %lu\n", this, m_ErrorCode)); } } else { SetLastError( dwErr ); }
} // EVENT_LOG::LogEventPrivate()
HANDLEEVENT_LOG::RegisterEventSourceChicagoStyle( IN LPCSTR lpszSource, IN PHANDLE hFile )/*++
Description: Register event source in win95
Arguments:
lpszSource - name of event source hFile - on return, contains handle to log file
Returns:
if successful, Handle to event source NULL, otherwise--*/{ HANDLE hSource = NULL; CHAR szPath[MAX_PATH+1]; STR regKey; DWORD len; DWORD err = NO_ERROR; HKEY hKey; HANDLE hEventFile = INVALID_HANDLE_VALUE;
//
// Initialize the cache
//
m_pDateTimeCache = new ASCLOG_DATETIME_CACHE(); //log format
if ( m_pDateTimeCache == NULL ) { err = GetLastError();
DBGPRINTF((DBG_CONTEXT, "Cannot allocate datetime cache[%d]\n", err)); goto exit; }
//
// Contruct the log file name
//
len = GetWindowsDirectory(szPath, sizeof(szPath));
if ( len == 0 ) { DBGPRINTF((DBG_CONTEXT,"GetWindowsDirectory returns 0\n")); goto exit; }
DBG_ASSERT(len <= MAX_PATH);
strcat(szPath, "\\"); strcat(szPath, lpszSource); strcat(szPath, ".event.log");
IF_DEBUG( INIT_CLEAN) { DBGPRINTF((DBG_CONTEXT,"Event log file set to %s\n", szPath)); }
//
// Open the file
//
hEventFile = CreateFile( szPath, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
if ( hEventFile == INVALID_HANDLE_VALUE ) { err = GetLastError(); goto exit; }
//
// Move to end of file
//
if ( SetFilePointer( hEventFile, 0, NULL, FILE_END ) == (DWORD)-1 ) { err = GetLastError(); goto exit; }
//
// If log file successfully opened - register event message source file.
// On Win9x registration simply means locating module handle for DLL,
// where we will load messages from.
//
regKey.Copy(EVENTLOG_KEY); regKey.Append(lpszSource);
err = RegOpenKeyEx( HKEY_LOCAL_MACHINE, regKey.QueryStr(), 0, KEY_ALL_ACCESS, &hKey);
if ( err == NO_ERROR) {
DWORD cbBuffer;
cbBuffer = sizeof(szPath); szPath[0] = '\0';
err = RegQueryValueEx( hKey, EVENTLOG_VALUE_KEY, NULL, NULL, (LPBYTE) szPath, &cbBuffer);
RegCloseKey( hKey);
if ( err == NO_ERROR ) {
hSource = GetModuleHandle(szPath); if ( hSource == NULL ) { err = GetLastError();
DBGPRINTF((DBG_CONTEXT,"GetModuleHandle[%s] returns %d\n", szPath, err)); } } else {
DBGPRINTF((DBG_CONTEXT, "Cannot find value %s. Err = %d\n", EVENTLOG_VALUE_KEY, err )); } } else {
DBGPRINTF((DBG_CONTEXT, "Cannot open key %s. Err = %d\n", regKey.QueryStr(), err )); }
exit:
if ( (err != NO_ERROR) || (hSource == NULL) ) {
if ( hEventFile != INVALID_HANDLE_VALUE ) { CloseHandle( hEventFile ); hEventFile = INVALID_HANDLE_VALUE; } hSource = NULL; SetLastError(err); }
*hFile = hEventFile; return(hSource);
} // RegisterEventSourceChicagoStyle()
BOOLEVENT_LOG::ReportEventChicagoStyle( IN HANDLE hEventSource, IN HANDLE hLogFile, IN DWORD idMessage, IN LPCSTR * apszSubStrings, IN DWORD dwErrorCode ){ SYSTEMTIME st; DWORD cch; DWORD nDate; CHAR buffer[MAX_PATH+1]; PCHAR pBuffer = buffer; BOOL fReturn = FALSE;
GetLocalTime( &st ); nDate = m_pDateTimeCache->GetFormattedDateTime(&st, pBuffer); pBuffer += nDate;
//
// Read message and add inserts
//
cch = ::FormatMessageA(FORMAT_MESSAGE_MAX_WIDTH_MASK | FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_ARGUMENT_ARRAY, hEventSource, idMessage, 0, (LPSTR)pBuffer, (DWORD)(sizeof(buffer) - nDate), (va_list*)apszSubStrings );
if (cch != 0) {
DWORD nBytes = 0;
DBGPRINTF((DBG_CONTEXT,"Reporting EVENT_LOG Event - %s\n", buffer)); cch += nDate; fReturn = WriteFile( hLogFile, buffer, cch, &nBytes, NULL);
if (nBytes != 0) {
DBG_ASSERT(cch == nBytes);
cch = wsprintf(buffer,"[%x]\r\n",dwErrorCode); fReturn = WriteFile(hLogFile,buffer,cch,&nBytes,NULL); } }
return(fReturn);
} // ReportEventChicagoStyle()
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