vc++调用exe获取输出信息

目的

调用命令行程序，返回结果。

思路

把命令行结果输入到管道中，exe的输出信息都存在了strOutput这个变量里。

实现代码

    CString strCmd = L"yara64.exe C:\\Users\\Windows32\\Downloads\\yara-master\\yara-master\\windows\\vs2017\\x64\\Debug\\yara.txt ";//cmd命令  
    strCmd = strCmd + pid;

    SECURITY_ATTRIBUTES sa;
    HANDLE hRead, hWrite;
    sa.nLength = sizeof(SECURITY_ATTRIBUTES);
    sa.lpSecurityDescriptor = NULL; //使用系统默认的安全描述符  
    sa.bInheritHandle = TRUE; //创建的进程继承句柄  

    if (!CreatePipe(&hRead, &hWrite, &sa, 0)) //创建匿名管道  
    {
        MessageBox(L"CreatePipe Failed!", L"提示", MB_OK | MB_ICONWARNING);
        return 0;
    }

    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    ZeroMemory(&si, sizeof(STARTUPINFO));

    si.cb = sizeof(STARTUPINFO);
    GetStartupInfo(&si);
    si.hStdError = hWrite;
    si.hStdOutput = hWrite; //新创建进程的标准输出连在写管道一端  
    si.wShowWindow = SW_HIDE; //隐藏窗口  
    si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;




    if (!CreateProcess(NULL, strCmd.GetBuffer(), NULL, NULL, TRUE, NULL, NULL, NULL, &si, &pi)) //创建子进程  
    {
        MessageBox(L"CreateProcess Failed!", L"提示", MB_OK | MB_ICONWARNING);
        return 0;
    }
    CloseHandle(hWrite); //关闭管道句柄  

    char buffer[4096] = { 0 };
    CString strOutput;
    DWORD bytesRead;

    while (true)
    {
        if (ReadFile(hRead, buffer, 4095, &bytesRead, NULL) == NULL) //读取管道  
            break;
        strOutput += buffer;
        UpdateWindow();
        Sleep(100);
    }
    CloseHandle(hRead);