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我在Microsoft 的文档站点上找到了以下评论：

此外，当使用 STARTF_USESTDHANDLES 时，CreateProcessWithLogonW 拒绝 STD 句柄 (0/1/2)，即 GetStdHandle() 默认返回的内容。它返回错误 6，无效句柄，因为 0/1/2 不是“真正的”句柄。我们发现重定向控制台输入/输出的唯一方法是创建自定义句柄（管道）并使用它们来代替（例如，即使只是作为您不使用的虚拟句柄）。这是 CreateProcessWithLogonW 缺少的功能，因为 CreateProcess（可能还有 CreateProcessAsUser，我没有验证）接受 STD 句柄。

这指向创建自定义管道。

我发现这个 StackOverflow 答案指向使用诸如"SafeFileHandle". 这显然是我不熟悉如何使用的 C++/CLI。我正在使用 Visual C++，因此是“本机”C++？

我正在寻找如何解决此问题的简单解决方案。我是 C++ 的新手，CLI 的事情让我很困惑，因为我根本不知道如何使用它，或者使 Visual C++ 与它兼容。

鉴于我的正常 C++ 和我的问题，我将如何创建自定义管道以允许我获得标准输出？

这是我的代码：

#include "stdafx.h"

void DisplayError(LPWSTR pszAPI)
{
    LPVOID lpvMessageBuffer;

    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | 
        FORMAT_MESSAGE_FROM_SYSTEM,
        NULL, GetLastError(), 
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), 
        (LPWSTR)&lpvMessageBuffer, 0, NULL);

    //
    //... now display this string
    //
    wprintf(L"ERROR: API        = %s.\n", pszAPI);
    wprintf(L"       error code = %d.\n", GetLastError());
    wprintf(L"       message    = %s.\n", (LPWSTR)lpvMessageBuffer);

    //
    // Free the buffer allocated by the system
    //
    LocalFree(lpvMessageBuffer);

    ExitProcess(GetLastError());
}

void _tmain(int argc, WCHAR *argv[])
{
    STARTUPINFO si;
    ZeroMemory( &si, sizeof(STARTUPINFO) );
    si.cb = sizeof(STARTUPINFO);

    HANDLE pipe1 = CreateNamedPipe(L"\\\\.\\pipe\\pipe1", PIPE_ACCESS_DUPLEX,
               PIPE_WAIT, 1024, 1024, 1024, 60, NULL);
    HANDLE pipe2 = CreateNamedPipe(L"\\\\.\\pipe\\pipe2", PIPE_ACCESS_DUPLEX,
               PIPE_WAIT, 1024, 1024, 1024, 60, NULL);
    si.dwFlags |= STARTF_USESHOWWINDOW;
    si.dwFlags = STARTF_USESTDHANDLES;
    si.hStdOutput = pipe1;
    si.hStdError =  pipe2;

    DWORD     dwSize;
    HANDLE    hToken;
    LPVOID    lpvEnv;
    PROCESS_INFORMATION pi = {0};
    WCHAR               szUserProfile[256] = L"";

    si.cb = sizeof(STARTUPINFO);

    if (argc != 4)
    {
        wprintf(L"Usage: %s [user@domain] [password] [cmd]", argv[0]);
        wprintf(L"\n\n");
        return;
    }

    //
    // TO DO: change NULL to '.' to use local account database
    //
    if (!LogonUser(argv[1], NULL, argv[2], LOGON32_LOGON_INTERACTIVE, 
            LOGON32_PROVIDER_DEFAULT, &hToken))
        DisplayError(L"LogonUser");

    if (!CreateEnvironmentBlock(&lpvEnv, hToken, TRUE))
        DisplayError(L"CreateEnvironmentBlock");

    dwSize = sizeof(szUserProfile)/sizeof(WCHAR);

    if (!GetUserProfileDirectory(hToken, szUserProfile, &dwSize))
        DisplayError(L"GetUserProfileDirectory");

    //
    // TO DO: change NULL to '.' to use local account database
    //
    if (!CreateProcessWithLogonW(argv[1], NULL, argv[2], 
            LOGON_WITH_PROFILE, NULL, argv[3], 
            CREATE_UNICODE_ENVIRONMENT, lpvEnv, szUserProfile, 
            &si, &pi))
        DisplayError(L"CreateProcessWithLogonW");

    if (!DestroyEnvironmentBlock(lpvEnv))
        DisplayError(L"DestroyEnvironmentBlock");

    CloseHandle(hToken);
    CloseHandle(pi.hProcess);
    CloseHandle(pi.hThread);
}

我试过这个，我在控制台窗口上没有得到任何输出。正如我所说，我检查了 StackOverflow 上的答案，整个 C++/CLI 事情让我感到困惑。如果有人知道使用 Visual C++ 使用自定义管道重定向输出的简单解决方案，请告诉我。

如果我在上面做错了什么，也请告诉我。

编辑：

在遵循雷米的回答给出的建议之后。我想出了以下代码，它产生错误代码 3：系统找不到指定的路径。

#include "stdafx.h"


HANDLE g_hChildStd_IN_Rd = NULL;
HANDLE g_hChildStd_IN_Wr = NULL;
HANDLE g_hChildStd_OUT_Rd = NULL;
HANDLE g_hChildStd_OUT_Wr = NULL;

HANDLE g_hInputFile = NULL;


int BUFSIZE = 1064;
void CreateChildProcess(void); 
void WriteToPipe(void); 
void ReadFromPipe(void); 
void ErrorExit(PTSTR); 

void DisplayError(LPWSTR pszAPI)
{
    LPVOID lpvMessageBuffer;

    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | 
        FORMAT_MESSAGE_FROM_SYSTEM,
        NULL, GetLastError(), 
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), 
        (LPWSTR)&lpvMessageBuffer, 0, NULL);

    //
    //... now display this string
    //
    wprintf(L"ERROR: API        = %s.\n", pszAPI);
    wprintf(L"       error code = %d.\n", GetLastError());
    wprintf(L"       message    = %s.\n", (LPWSTR)lpvMessageBuffer);

    //
    // Free the buffer allocated by the system
    //
    LocalFree(lpvMessageBuffer);

    ExitProcess(GetLastError());
}





void _tmain(int argc, WCHAR *argv[])
{

SECURITY_ATTRIBUTES saAttr; 
   saAttr.nLength = sizeof(SECURITY_ATTRIBUTES); 
   saAttr.bInheritHandle = TRUE; 
   saAttr.lpSecurityDescriptor = NULL; 

   if ( ! CreatePipe(&g_hChildStd_OUT_Rd, &g_hChildStd_OUT_Wr, &saAttr, 0) ) 
      ErrorExit(TEXT("StdoutRd CreatePipe")); 

   if ( ! SetHandleInformation(g_hChildStd_OUT_Rd, HANDLE_FLAG_INHERIT, 0) )
      ErrorExit(TEXT("Stdout SetHandleInformation")); 

    if (! CreatePipe(&g_hChildStd_IN_Rd, &g_hChildStd_IN_Wr, &saAttr, 0)) 
      ErrorExit(TEXT("Stdin CreatePipe")); 

    if ( ! SetHandleInformation(g_hChildStd_IN_Wr, HANDLE_FLAG_INHERIT, 0) )
      ErrorExit(TEXT("Stdin SetHandleInformation")); 

    /////////////////////////////Start CreateChildProcess////////



    STARTUPINFO si;
    ZeroMemory( &si, sizeof(STARTUPINFO) );
    si.cb = sizeof(STARTUPINFO);

    si.dwFlags |= STARTF_USESHOWWINDOW;
    si.dwFlags |= STARTF_USESTDHANDLES;
    si.hStdError = g_hChildStd_OUT_Wr;
    si.hStdOutput = g_hChildStd_OUT_Wr;
    si.hStdInput = g_hChildStd_IN_Rd;

    DWORD     dwSize;
    HANDLE    hToken;
    LPVOID    lpvEnv;
    PROCESS_INFORMATION pi = {0};
    WCHAR               szUserProfile[256] = L"";

    si.cb = sizeof(STARTUPINFO);

    if (argc != 4)
    {
        wprintf(L"Usage: %s [user@domain] [password] [cmd]", argv[0]);
        wprintf(L"\n\n");
        return;
    }

    //
    // TO DO: change NULL to '.' to use local account database
    //
    if (!LogonUser(argv[1], NULL, argv[2], LOGON32_LOGON_INTERACTIVE, 
            LOGON32_PROVIDER_DEFAULT, &hToken))
        DisplayError(L"LogonUser");

    if (!CreateEnvironmentBlock(&lpvEnv, hToken, TRUE))
        DisplayError(L"CreateEnvironmentBlock");

    dwSize = sizeof(szUserProfile)/sizeof(WCHAR);

    if (!GetUserProfileDirectory(hToken, szUserProfile, &dwSize))
        DisplayError(L"GetUserProfileDirectory");

    //
    // TO DO: change NULL to '.' to use local account database
    //
    if (!CreateProcessWithLogonW(argv[1], NULL, argv[2], 
            LOGON_WITH_PROFILE, NULL, argv[3], 
            CREATE_UNICODE_ENVIRONMENT, lpvEnv, szUserProfile, 
            &si, &pi))
        DisplayError(L"CreateProcessWithLogonW");

    if (!DestroyEnvironmentBlock(lpvEnv))
        DisplayError(L"DestroyEnvironmentBlock");

    CloseHandle(hToken);
    CloseHandle(pi.hProcess);
    CloseHandle(pi.hThread);



    /////////////////////////////End CreateChildProcess///////////

     if (argc == 1) 
      ErrorExit(TEXT("Please specify an input file.\n")); 

   g_hInputFile = CreateFile(
       argv[3], 
       GENERIC_READ, 
       0, 
       NULL, 
       OPEN_EXISTING, 
       FILE_ATTRIBUTE_READONLY, 
       NULL); 

   if ( g_hInputFile == INVALID_HANDLE_VALUE ) 
      ErrorExit(TEXT("CreateFile")); 

     WriteToPipe(); 
   printf( "\n->Contents of %s written to child STDIN pipe.\n", argv[1]);


      printf( "\n->Contents of child process STDOUT:\n\n", argv[1]);
   ReadFromPipe(); 

}

void WriteToPipe(void) 

// Read from a file and write its contents to the pipe for the child's STDIN.
// Stop when there is no more data. 
{ 
   DWORD dwRead, dwWritten; 
   CHAR chBuf[4096];
   BOOL bSuccess = FALSE;

   for (;;) 
   { 
      bSuccess = ReadFile(g_hInputFile, chBuf, BUFSIZE, &dwRead, NULL);
      if ( ! bSuccess || dwRead == 0 ) break; 

      bSuccess = WriteFile(g_hChildStd_IN_Wr, chBuf, dwRead, &dwWritten, NULL);
      if ( ! bSuccess ) break; 
   } 

// Close the pipe handle so the child process stops reading. 

   if ( ! CloseHandle(g_hChildStd_IN_Wr) ) 
      ErrorExit(TEXT("StdInWr CloseHandle")); 
} 

void ReadFromPipe(void) 

// Read output from the child process's pipe for STDOUT
// and write to the parent process's pipe for STDOUT. 
// Stop when there is no more data. 
{ 
   DWORD dwRead, dwWritten; 
   CHAR chBuf[4096]; 
   BOOL bSuccess = FALSE;
   HANDLE hParentStdOut = GetStdHandle(STD_OUTPUT_HANDLE);

   for (;;) 
   { 
      bSuccess = ReadFile( g_hChildStd_OUT_Rd, chBuf, BUFSIZE, &dwRead, NULL);
      if( ! bSuccess || dwRead == 0 ) break; 

      bSuccess = WriteFile(hParentStdOut, chBuf, 
                           dwRead, &dwWritten, NULL);
      if (! bSuccess ) break; 
   } 
} 

void ErrorExit(PTSTR lpszFunction) 

// Format a readable error message, display a message box, 
// and exit from the application.
{ 
    LPVOID lpMsgBuf;
    LPVOID lpDisplayBuf;
    DWORD dw = GetLastError(); 

    FormatMessage(
        FORMAT_MESSAGE_ALLOCATE_BUFFER | 
        FORMAT_MESSAGE_FROM_SYSTEM |
        FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL,
        dw,
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
        (LPTSTR) &lpMsgBuf,
        0, NULL );

    lpDisplayBuf = (LPVOID)LocalAlloc(LMEM_ZEROINIT, 
        (lstrlen((LPCTSTR)lpMsgBuf)+lstrlen((LPCTSTR)lpszFunction)+40)*sizeof(TCHAR)); 
    StringCchPrintf((LPTSTR)lpDisplayBuf, 
        LocalSize(lpDisplayBuf) / sizeof(TCHAR),
        TEXT("%s failed with error %d: %s"), 
        lpszFunction, dw, lpMsgBuf); 
    MessageBox(NULL, (LPCTSTR)lpDisplayBuf, TEXT("Error"), MB_OK); 

    LocalFree(lpMsgBuf);
    LocalFree(lpDisplayBuf);
    ExitProcess(1);
}

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1 回答 1

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使用匿名管道 via CreatePipe()，而不是使用命名管道 via CreateNamedPipe()。有关示例，请参见 MSDN：

创建具有重定向输入和输出的子进程

于 2013-02-22T18:45:03.347 回答