New subject: [Bug 14915] FlushFileBuffers() fails on disk volume, sets ERROR_INVALID_HANDLE when handle supposedly valid

19 Aug 2008


      http://bugs.winehq.org/show_bug.cgi?id=14915
Summary: FlushFileBuffers() fails on disk volume, sets
                    ERROR_INVALID_HANDLE when handle supposedly valid
           Product: Wine
           Version: 1.1.2
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: wine-bugs@winehq.org
        ReportedBy: vesselinpeev@hotmail.com
Ran under Wine, the following program receives ERROR_INVALID_HANDLE as a
Windows last error when the flushing call fails.
Note that if you are testing under Windows Vista, you need to run the program
with administrative privileges to be able to get the handle to the volume.
For brevity, I've omitted GetLastError() printing for failure cases except the
flushing one, but, needless to say, you may want to add them for full
correctness / error handling / safety, or do let me know and I'll happily add
these and re-post the code.
#  include <windows.h>
#  include <stdio.h>
#  include <tchar.h>
int _tmain()
{
  LPCTSTR volName = _T("\\.\C:");
  HANDLE hFile = CreateFile(volName, GENERIC_READ | GENERIC_WRITE,
                            FILE_SHARE_READ | FILE_SHARE_WRITE, 0,
OPEN_EXISTING, 0, 0);
  if (hFile != INVALID_HANDLE_VALUE) {
    _tprintf(_T("Opened volume %s\n"), volName);
SetLastError(0xdeadbeef); /* to make sure that it's really the next call
that sets the last error -- advice taken from Dmitry Timoshkov's comment at
http://bugs.winehq.org/show_bug.cgi?id=14855 */
if (FlushFileBuffers(hFile)) {
      _tprintf(_T("File buffers flushed\n"));
    }
    else {
      DWORD dwRet = GetLastError();
      _ftprintf(stderr, _T("File buffers not flushed, GetLastError() returned
%lu"), dwRet);
      if(dwRet == ERROR_INVALID_HANDLE) {
        _ftprintf(stderr, _T(" ("The handle is invalid")"));
      }
      _ftprintf(stderr, ".\n");
    }
  }
  else {
    _ftprintf(stderr, _T("Could not open volume %s\n"), volName);
    return -2;
  }  
  if(! CloseHandle(hFile)) {
    _ftprintf(stderr, _T("Could not close handle to volume %s\n"), volName);
    return -3;
  }
  return 0;
}
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[Bug 14915] New: FlushFileBuffers() fails on disk volume, sets ERROR_INVALID_HANDLE when handle supposedly valid