将CreateProcess输出重定向到使用CreateFileMapping VC ++创建的共享内存

Question

我有一个主VC ++应用程序正在创建共享内存，如下面的代码所示：

if (m_hMapFile == NULL)
{
    SECURITY_ATTRIBUTES structSecurityAttr = { 0 };

    m_hMapFile = CreateFileMapping(INVALID_HANDLE_VALUE, &structSecurityAttr, PAGE_READWRITE | SEC_COMMIT, 0, BUF_SIZE, (LPCSTR)(LPCTSTR)szName);

    if (m_hMapFile == NULL)
    {
        DWORD dwError = GetLastError();
        CString strError;
        strError.Format(_T("%lu"), dwError);
        return FALSE;
    }

    pSharedMemBuf = (LPTSTR)MapViewOfFile(m_hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, BUF_SIZE);
    if (pSharedMemBuf == NULL)
    {
        return FALSE;
    }
    //Initialize the Shared Memory.                          
    ZeroMemory((void *)pSharedMemBuf, BUF_SIZE);
}

从这个主进程的一个线程我将映射到共享内存，如下所示：

if (m_hMapFile == NULL)
{
    //Open the Named Shared Memory 
    m_hMapFile = OpenFileMapping(FILE_MAP_READ | FILE_MAP_WRITE | FILE_MAP_COPY, TRUE, (LPCSTR)(LPCTSTR)szName); //FILE_MAP_ALL_ACCESS
    if (m_hMapFile == NULL)
    {
        return FALSE;
    }

    //Get the Shared Memory Buffer Pointer.
    pSharedMemBuf = (LPTSTR)MapViewOfFile(m_hMapFile, FILE_MAP_READ | FILE_MAP_WRITE | FILE_MAP_COPY/*FILE_MAP_ALL_ACCESS*/, 0, 0, BUF_SIZE);

    DWORD error = GetLastError();

    //If Shared Memory Buffer is NULL then return the control
    if (pSharedMemBuf == NULL)
    {
        CString strSize;
        strSize.Format(_T("Error is %d"), error);
        return FALSE;
    }
}

现在，我想将CreateProcess调用的输出重定向到此共享内存。我正在提供FileMapping STARTUPINFO，如下所示：

si.hStdOutput   = m_hMapFile;
si.hStdError    = m_hMapFile;

然后按如下方式创建流程：

CreateProcess( NULL, szCombinedCmd, &saAttr, NULL, TRUE, 
    dwCreateFlags, NULL, pszCurrentDirectory, &si, &pi );

但是，当我尝试读取共享内存时，我没有将输出输入缓冲区。请帮我解决这个问题。