VC使用管道重定向进程输入输出

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创建管道

	std::string sLog;
	HANDLE hRead1, hWrite1, hRead2, hWrite2;
	
	SECURITY_ATTRIBUTES sat;
	sat.nLength = sizeof(SECURITY_ATTRIBUTES);
	sat.bInheritHandle = true;
	sat.lpSecurityDescriptor = nullptr;
	if(!CreatePipe(&hRead1,&hWrite1,&sat,0))
	{
		sLog = "管道1创建失败...";	
		return false;
	}
	if(!CreatePipe(&hRead2,&hWrite2,&sat,0))
	{
		sLog = "管道2创建失败...";	
		CloseHandle(hRead1);
		CloseHandle(hWrite1);
		return false;
	}

创建进程并重定向

	STARTUPINFO startupinfo;
	startupinfo.cb = sizeof(STARTUPINFO);
	GetStartupInfo(&startupinfo);
	startupinfo.hStdError = hWrite2;
	startupinfo.hStdOutput = hWrite2;
	startupinfo.hStdInput = hRead1;
	startupinfo.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
	startupinfo.wShowWindow = SW_HIDE;

	PROCESS_INFORMATION pinfo;
	std::string sCmd = "plink.exe -ssh -P 22 [email protected]";
	if(!CreateProcess(NULL, (LPSTR)sCmd.c_str(), NULL, NULL, TRUE, NULL, NULL, NULL, &startupinfo, &pinfo))
	{
		sLog = "进程创建失败...";
		CloseHandle(hRead1);
		CloseHandle(hWrite1);
		CloseHandle(hRead2);
		CloseHandle(hWrite2);
		return false;
	}
	CloseHandle(pinfo.hThread);
	CloseHandle(pinfo.hProcess);

发送数据

	DWORD byteWrite = 0;
	sCmd = "help\r\n";
	WriteFile(hWrite1, sCmd.c_str(), sCmd.length(), &byteWrite, NULL); 
	if(byteWrite == sCmd.length())
		return true;
	else
		return false;

读取数据

读之前应先查看管道是否有数据

	DWORD byteRead; 
	if(!PeekNamedPipe(hRead2,NULL,0,NULL,&byteRead,NULL))
	{
		return false;
	}
	if(byteRead <= 0)
	{
		sLog = "管道无数据\n";
		return true;
	}
	char buffer[1024] = {0};         
	ReadFile(hRead2, buffer, 4095, &byteRead, NULL);