C++ WaitForSingleObject在使用VC9编译器时挂起在VC12中

以下代码在VC9编译器中工作，而同一代码在VC12中不工作。你需要改变结构吗

问题来自WaitForSingleObject pi.hProcess，无限；线 在这一行之后，代码没有执行

bool MyClass::check()
{

    CSA_TRY
    {   
        HANDLE hPipeOutputRead      = NULL; 
        HANDLE hPipeOutputWrite = NULL; 
        PROCESS_INFORMATION pi      = {0}; 
        STARTUPINFO si              = {0}; 
        SECURITY_ATTRIBUTES sa      = {0}; 

        // Create a pipe for the child's STDOUT. 
        sa.nLength = sizeof( SECURITY_ATTRIBUTES ); 
        sa.bInheritHandle = TRUE; 
        sa.lpSecurityDescriptor = NULL; 


        // Create pipe for standard output redirection. 
        CreatePipe( &hPipeOutputRead,           // read handle 
            &hPipeOutputWrite,          // write handle 
            &sa,                        // security attributes 
            0                           // number of bytes reserved for pipe - 0 default 
            );  // Create pipe for standard input redirection. 


        // Make child process use hPipeOutputWrite as standard out, 
        // and make sure it does not show on screen. 
        si.cb           = sizeof(STARTUPINFO); 
        //si.cb         = sizeof(si);
        si.dwFlags     = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES; 
        si.wShowWindow = SW_HIDE; 
        si.hStdOutput  = hPipeOutputWrite; 
        si.hStdError   = hPipeOutputWrite; 


        TCHAR commandLine[ MAX_PATH ] = _T("cmd.exe ver"); 

        //spawn a new child process...
        CreateProcess(      NULL, 
            commandLine, 
            NULL, NULL, 
            TRUE, 0, 
            NULL, NULL, 
            &si, &pi
            ); 

        // Now that handles have been inherited, close it to be safe. 
        // You don't want to read or write to them accidentally. 
        CloseHandle( hPipeOutputWrite ); 

        // Now capture the application output by reading hPipeOutputRead.

        DWORD dwNumberOfBytesRead = 0; 
        CHAR szBuffer[ 65535 ]; 
        CString conOut; 
        BOOL bTest = TRUE; 

        bTest   =   ReadFile( hPipeOutputRead,              // handle of the read end of our pipe 
            &szBuffer,              // address of buffer that receives data 
            256,                    // number of bytes to read 
            &dwNumberOfBytesRead,   // address of number of bytes read 
            NULL                    // non-overlapped. 
            );

        szBuffer[dwNumberOfBytesRead] = 0;  // null terminate 
        conOut = szBuffer;

        WaitForSingleObject ( pi.hProcess, INFINITE );

        // Close all remaining handles 
        CloseHandle ( pi.hProcess ); 
        CloseHandle ( hPipeOutputRead );

        return true;
    }
    CSA_CATCH_ANY
    {
        //code
    }
}

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您正在启动进程cmd.exe ver。如果在资源管理器WindowsR中手动运行此操作，则可以看到cmd.exe ver打印出Windows版本，然后保持打开状态。程序将等待cmd.exe版本退出

因此，您需要关闭打开的cmd.exe版本（例如键入exit），或者将命令行更改为cmd.exe/c版本

代码中的另一个问题：您没有设置si.hStdInput

---

您确实应该添加错误检查，以查看哪些错误代码确实失败。

它等待进程关闭。因为您通过了无限，它将继续等待，直到进程关闭。这是预期的行为。您没有检查代码中的任何地方的返回值，因此您实际上无法了解问题发生的位置；它甚至不知道你用的是哪种编译器。这表明问题在其他地方，例如，在可能触发您正在等待的事件的代码中。请提供可编译的。请比较一下。我试过使用cmd.exe/c ver和格式化字符串，例如：swprintf_s commandLine1，L%s/c%s，cmd，input；但它仍然不起作用。conOut=szBuffer；未获取版本的值。