log.c File Reference

#include "myservice.h"

Include dependency graph for log.c:

Go to the source code of this file.

Functions
static VOID	LogToEventLog (LPCTSTR lpMsg, DWORD errNum, DWORD exitCode, UINT flags)
static BOOL	OpenLogFile ()
static BOOL	LogToFile (LPCTSTR lpMsg, DWORD errNum, DWORD exitCode, UINT flags)
VOID	LogEvent (LPCTSTR lpMsg, DWORD errNum, DWORD exitCode, UINT flags)
VOID	InitLogging ()

Variables
static LPTSTR	lpEventSource = _T("Skeleton service")
static LPTSTR	lpLogFileName = _T("C:\\skel_service.log")
static HANDLE	hLogFile

Function Documentation

InitLogging()

VOID InitLogging

(

)

Definition at line 167 of file log.c.

{
    WCHAR wcBom = 0xFEFF;

    DeleteFile(lpLogFileName);

#ifdef _UNICODE
    if (OpenLogFile())
    {
        DWORD bytesWritten;

        WriteFile(hLogFile,
                  &wcBom,
                  sizeof(WCHAR),
                  &bytesWritten,
                  NULL);
        if (bytesWritten == 0)
        {
            LogToEventLog(_T("Failed to write to log file"),
                          GetLastError(),
                          0,
                          LOG_EVENTLOG | LOG_ERROR);
        }

        CloseHandle(hLogFile);
    }
#endif
}

LogEvent()

VOID LogEvent	(	LPCTSTR	lpMsg,
		DWORD	errNum,
		DWORD	exitCode,
		UINT	flags
	)

Definition at line 152 of file log.c.

{
#ifdef DEBUG
    if (flags & LOG_FILE || flags & LOG_ERROR)
        LogToFile(lpMsg, errNum, exitCode, flags);
#endif
    if (flags & LOG_EVENTLOG)
        LogToEventLog(lpMsg, errNum, exitCode, flags);
}

LogToEventLog()

static VOID LogToEventLog ( LPCTSTR  lpMsg, DWORD  errNum, DWORD  exitCode, UINT  flags  )

static

Definition at line 18 of file log.c.

{
    HANDLE hEventLog;

    hEventLog = RegisterEventSource(NULL, lpEventSource);
    if (hEventLog)
    {
        ReportEvent(hEventLog,
                    (flags & LOG_ERROR) ? EVENTLOG_ERROR_TYPE : EVENTLOG_SUCCESS,
                    0,
                    0,
                    NULL,
                    1,
                    0,
                    &lpMsg,
                    NULL);

        CloseEventLog(hEventLog);
    }
}

Referenced by InitLogging(), LogEvent(), and LogToFile().

LogToFile()

static BOOL LogToFile ( LPCTSTR  lpMsg, DWORD  errNum, DWORD  exitCode, UINT  flags  )

static

Definition at line 59 of file log.c.

{
    LPTSTR lpFullMsg = NULL;
    DWORD msgLen;

    if (!OpenLogFile())
        return FALSE;

    msgLen = _tcslen(lpMsg) + 1;

    if (flags & LOG_ERROR)
    {
        LPVOID lpSysMsg;
        DWORD eMsgLen;

        eMsgLen = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
                                NULL,
                                errNum,
                                MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                                (LPTSTR)&lpSysMsg,
                                0,
                                NULL);

        msgLen = msgLen + eMsgLen + 40;

        lpFullMsg = HeapAlloc(GetProcessHeap(),
                              0,
                              msgLen * sizeof(TCHAR));
        if (lpFullMsg)
        {
            _sntprintf(lpFullMsg,
                       msgLen,
                       _T("%s : %s\tErrNum = %lu ExitCode = %lu\r\n"),
                       lpMsg,
                       lpSysMsg,
                       errNum,
                       exitCode);
        }

        LocalFree(lpSysMsg);

    }
    else
    {
        msgLen += 2;

        lpFullMsg = HeapAlloc(GetProcessHeap(),
                              0,
                              msgLen * sizeof(TCHAR));
        if (lpFullMsg)
        {
            _sntprintf(lpFullMsg,
                       msgLen,
                      _T("%s\r\n"),
                      lpMsg);
        }
    }

    if (lpFullMsg)
    {
        DWORD bytesWritten;

        SetFilePointer(hLogFile, 0, NULL, FILE_END);

        WriteFile(hLogFile,
                  lpFullMsg,
                  _tcslen(lpFullMsg) * sizeof(TCHAR),
                  &bytesWritten,
                  NULL);
        if (bytesWritten == 0)
        {
            LogToEventLog(_T("Failed to write to log file"),
                          GetLastError(),
                          0,
                          LOG_EVENTLOG | LOG_ERROR);
        }

        HeapFree(GetProcessHeap(),
                 0,
                 lpFullMsg);
    }

    CloseHandle(hLogFile);

    if (exitCode > 0)
        ExitProcess(exitCode);
}

Referenced by LogEvent().

OpenLogFile()

static BOOL OpenLogFile ( )

static

Definition at line 43 of file log.c.

{
    hLogFile = CreateFile(lpLogFileName,
                          GENERIC_WRITE,
                          0,
                          NULL,
                          OPEN_ALWAYS,
                          FILE_ATTRIBUTE_NORMAL,
                          NULL);
    if (hLogFile  == INVALID_HANDLE_VALUE) 
        return FALSE;

    return TRUE;
}

Referenced by InitLogging(), and LogToFile().

Variable Documentation

hLogFile

HANDLE hLogFile

static

Definition at line 14 of file log.c.

Referenced by InitLogging(), LogToFile(), and OpenLogFile().

lpEventSource

LPTSTR lpEventSource = _T("Skeleton service")

static

Definition at line 12 of file log.c.

Referenced by LogToEventLog().

lpLogFileName

LPTSTR lpLogFileName = _T("C:\\skel_service.log")

static

Definition at line 13 of file log.c.

Referenced by InitLogging(), and OpenLogFile().