FIX: CFile::SetStatus Throws Exception When Setting Time

• The Microsoft Foundation Classes (MFC), included with:

      - Microsoft Visual C++, 32-bit Edition, version 1.0
  

SYMPTOMS

An attempt to set the status of a file using the function CFile::SetStatus results in a CFileException. If you do not have an exception handler defined, the result will depend on what the target type for the application is:

• If it is a Win32-based application, a modal dialog box will pop up that says the command failed.
• If running a console application, you will see output similar to:

        CFile exception: generic, OS error information = 1812
        Warning: Throwing an Exception of type CFileException
        Error: Un-caught Exception (CFileException)
        AfxTerminate called
        AfxAbort called
  

        abnormal program termination
  

CAUSE

This behavior occurs whenever the CFileStatus member m_mtime is nonzero. There is a coding problem that incorrectly throws an exception when updating the file time.

The following console application duplicates this error:

   /* Build as a console application using
   ** Microsoft Foundation Classes
   ** Be sure that TEMP.DAT file exists in the same directory.
   */
   #include <afx.h>

   CFileStatus fs;

   void main(void) {
     CFile::GetStatus("TEMP.DAT",fs);
     CFile::SetStatus("TEMP.DAT",fs);
   }

RESOLUTION

To work around this problem, update the Microsoft Foundation Class (MFC) library files by making a modification to the MFC source file FILEST.CPP. Remove the semicolon from the end of the "if" statement in line 134:

Change the following:

   if (!SystemTimeToFileTime((LPSYSTEMTIME)&sysTime, pFileTime));

   if (!SystemTimeToFileTime((LPSYSTEMTIME)&sysTime, pFileTime))

• Appendix B of the online "Class Library User's Guide"

  -or-

• The README.TXT file in the MSVC\MFC\SRC directory

Run the NMAKE command from the \MSVCNT\MFC\SRC directory.

The debug version:

   NMAKE MODEL=N TARGET=W DEBUG=1 CODEVIEW=2

   NMAKE MODEL=N TARGET=W DEBUG=0

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug was corrected in Microsoft Visual C++ 32-bit Edition, version 2.0.

Keywords          : MfcFileIO
Technology        : kbmfc
Version           : 1.0
Platform          : NT WINDOWS
Issue type        : kbbug
Solution Type     : kbfix