C++匿名管道

typedef struct _STARTUPINFO { 
    DWORD   cb; 
    LPTSTR  lpReserved;  
    LPTSTR  lpDesktop; 
    LPTSTR  lpTitle; 
    DWORD   dwX; 
    DWORD   dwY; 
    DWORD   dwXSize; 
    DWORD   dwYSize; 
    DWORD   dwXCountChars; 
    DWORD   dwYCountChars; 
    DWORD   dwFillAttribute; 
    DWORD   dwFlags; 
    WORD    wShowWindow; 
    WORD    cbReserved2; 
    LPBYTE  lpReserved2; 
    HANDLE  hStdInput; 
    HANDLE  hStdOutput; 
    HANDLE  hStdError; 
} STARTUPINFO, *LPSTARTUPINFO; 

typedef struct _PROCESS_INFORMATION { 
    HANDLE hProcess; 
    HANDLE hThread; 
    DWORD dwProcessId; 
    DWORD dwThreadId; 
} PROCESS_INFORMATION; 

typedef struct _SECURITY_ATTRIBUTES {
DWORD nLength; / /结构体的大小，可用SIZEOF取得
LPVOID lpSecurityDescriptor; / /安全描述符
BOOL bInheritHandle ;/ /安全描述的对象能否被新创建的进程继承
} SECURITY_ATTRIBUTES，* PSECURITY_ATTRIBUTES;

//头部文件文件
#include <Windows.h>
#include <iostream.h>
#include <stdio.h>

SECURITY_ATTRIBUTES saa,sab;
	PROCESS_INFORMATION pi;
	STARTUPINFO sui;
	HANDLE mReadPipe,mWritePipe,mReadFile,mWriteFile;
	HANDLE mThread;
	DWORD dwRead;

void closehandle()
{
	CloseHandle(mReadPipe);
	CloseHandle(mWritePipe);
	CloseHandle(mReadFile);
	CloseHandle(mWriteFile);
	mReadPipe=NULL;
	mWritePipe=NULL;
	mReadFile=NULL;
	mWriteFile=NULL;
	mThread=NULL;
}

DWORD WINAPI PipeProc(
  LPVOID lpParameter   // thread data
)
{
    HANDLE hRead = (HANDLE)lpParameter;
	char buf[1024];
	memset(buf,0,1024);
	DWORD dwRead;
	while(1)
	{
		PeekNamedPipe(hRead,buf,1024,&dwRead,NULL,NULL);
		if(dwRead != 0)
		{
			ReadFile(hRead,buf,1024,&dwRead,NULL);
			cout<<buf<<endl;
			memset(buf,0,sizeof(buf));
		}
		
	}
	return 0;
};

void main()
{
	
	//初始化SECURITY_ATTRIBUTES结构
	saa.bInheritHandle = TRUE;
	saa.lpSecurityDescriptor=NULL;
	saa.nLength = sizeof(SECURITY_ATTRIBUTES);
	
	sab.bInheritHandle = TRUE;
	sab.lpSecurityDescriptor=NULL;
	sab.nLength = sizeof(SECURITY_ATTRIBUTES);
	
	//创建匿名管道
	if(!CreatePipe(&mReadPipe,&mWriteFile,&saa,0))
	{
		cout<<"创建匿名管道失败"<<endl;
		return;
	}
	if(!CreatePipe(&mReadFile,&mWritePipe,&sab,0))
	{
		cout<<"创建匿名管道失败"<<endl;
		return;
	}
	
	ZeroMemory(&sui,sizeof(STARTUPINFO)); //结构初始化为0
	GetStartupInfo(&sui); //获取调用进程信息
	
	sui.dwFlags =  STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
	sui.wShowWindow = SW_HIDE;
	sui.hStdInput = mReadPipe;
	sui.hStdOutput = mWritePipe;
	sui.hStdError = mWritePipe;
	
	if(!CreateProcess(NULL,"cmd.exe",NULL,NULL,TRUE,0,NULL,NULL,&sui,&pi))
	{
		cout<<"创建子进程失败"<<endl;
		closehandle();
		return;
	}

	mThread = CreateThread(NULL,0,PipeProc,(LPVOID)mReadFile,0,NULL);
	if(NULL==mThread)
	{
        cout<<"创建线程失败!"<<endl;
		closehandle();
        return;
	}

	CloseHandle(mThread);
	Sleep(100);
	
	while(1)
	{
		char buf[256];
		memset(buf,0,256);
		cout<<"Command:"<<flush;
		gets(buf);
		if(strcmp(buf,"exit")!=0)
		{
			buf[strlen(buf)]='\n';
			WriteFile(mWriteFile,buf,strlen(buf),&dwRead,NULL);
			Sleep(100);
		}
		else
			break;
	}
	closehandle();
	cout<<"程序运行结束!"<<endl;
	system("pause");
	exit(0);
}