使用管道来获取CMD命令的结果

最新推荐文章于 2023-10-25 11:17:02 发布

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#cmd #null #attributes #buffer #path

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本文介绍了一个使用C++编写的Windows环境下创建Ping进程的方法。该进程通过CreatePipe和CreateProcess函数实现，并将Ping命令的输出重定向到指定窗口。文章详细展示了如何设置管道、启动信息及进程信息。

UINT __cdecl ThreadProc(LPVOID lParam)
{
	HWND hWnd = (HWND)lParam;
	ASSERT(hWnd);
	
	TCHAR szApp[MAX_PATH] = _T("ping www.youkuaiyun.com");
	HANDLE hRead = NULL;
	HANDLE hWrite = NULL;
	SECURITY_ATTRIBUTES sa = {0};
	sa.nLength = sizeof(sa);
	sa.lpSecurityDescriptor = NULL;
	sa.bInheritHandle = TRUE;
	
	if(!CreatePipe(&hRead, &hWrite, &sa, 0))
	{
		AfxMessageBox(_T("CreatePipe failed."));
		return -1;
	}
	
	STARTUPINFO si = {sizeof(si)};
	PROCESS_INFORMATION pi = {0};
	si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;	
	si.hStdOutput = hWrite;
	si.hStdError = hWrite;
	si.wShowWindow = SW_HIDE;
	
	if(!CreateProcess(NULL, szApp, NULL, NULL, TRUE, NULL, NULL, NULL, &si, &pi))
	{
		CloseHandle(hWrite);
		CloseHandle(hRead);
		return -1;
	}
	
	CloseHandle(pi.hThread);
	CloseHandle(pi.hProcess);
	CloseHandle(hWrite);

#define MAX_BUFFER 1024

	char szBuf[MAX_BUFFER] = {0};
	DWORD dwRead = 0;
	CString strText(_T(""));
	
	while(ReadFile(hRead, szBuf, MAX_BUFFER-1, &dwRead, NULL))
	{
	//	strText += szBuf;
		memset(szBuf, 0, sizeof(szBuf));
	}	
	CloseHandle(hRead);
	AfxMessageBox(strText);
	return 0;
}