BOOL BackupBootSector ( LPCTSTR lpszVolumeName )
Definition at line 57 of file install.c.
Referenced by FatSwapFat32BootSector(), InstallFat32BootCodeToDisk(), and main().
{
    HANDLE  hBackupFile;
    TCHAR   szFileName[MAX_PATH];
    ULONG   Count;
    BYTE    BootSectorBuffer[512];
    DWORD   dwNumberOfBytesWritten;
    BOOL    bRetVal;

    //
    // Find the next unused filename and open it
    //
    for (Count=0; ; Count++)
    {
        //
        // Generate the next filename
        //
        _stprintf(szFileName, _T("%s\\bootsect.%03ld"), lpszVolumeName, Count);

        //
        // Try to create a new file, fail if exists
        //
        hBackupFile = CreateFile(szFileName, GENERIC_WRITE, 0, NULL, CREATE_NEW, /*FILE_ATTRIBUTE_SYSTEM*/0, NULL);

        //
        // Check to see if it worked
        //
        if (hBackupFile != INVALID_HANDLE_VALUE)
        {
            break;
        }

        //
        // Nope, didn't work
        // Check to see if it already existed
        //
        if (!(GetLastError() != ERROR_ALREADY_EXISTS))
        {
            _tprintf(_T("%s:%d: "), __FILE__, __LINE__);
            _tprintf(_T("Boot sector backup failed. Error code %ld.\n"), GetLastError());
            return FALSE;
        }
    }

    //
    // Try to read the boot sector
    //
    if (!ReadVolumeSector(0, BootSectorBuffer))
    {
        CloseHandle(hBackupFile);
        return FALSE;
    }

    //
    // Try to write the boot sector data to the file
    //
    bRetVal = WriteFile(hBackupFile, BootSectorBuffer, 512, &dwNumberOfBytesWritten, NULL);
    if (!bRetVal || (dwNumberOfBytesWritten != 512))
    {
        CloseHandle(hBackupFile);
        _tprintf(_T("%s:%d: "), __FILE__, __LINE__);
        _tprintf(_T("WriteFile() failed. Error code %ld.\n"), GetLastError());
        return FALSE;
    }

    _tprintf(_T("Boot sector backed up to file: %s\n"), szFileName);

    CloseHandle(hBackupFile);

    return TRUE;
}
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