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);