c调用程序并失去其输出的方法

char buffer[1024];
	STARTUPINFO si = {0};
	PROCESS_INFORMATION pi = {0};
	DWORD bytesRead;
	SECURITY_ATTRIBUTES sa = {0};                                              
	HANDLE hRead = NULL, hWrite = NULL;                                  //设置管道读写句柄   
	sa.nLength = sizeof(SECURITY_ATTRIBUTES);    
	sa.lpSecurityDescriptor = NULL;    
	sa.bInheritHandle = TRUE;    
	if (!CreatePipe(&hRead, &hWrite, &sa,0))                             //创建管道   
	{    
		return;    
	}    
	
	si.cb = sizeof(STARTUPINFO);    
	GetStartupInfo(&si);   
	si.hStdError = hWrite;                                              //   
	si.hStdOutput = hWrite;                                             //   
	si.wShowWindow = SW_HIDE;    
	si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;    
	//key step
	if (!CreateProcess(NULL, command, NULL, NULL, TRUE, NULL, NULL, NULL, &si, &pi))
	{    
		CloseHandle(hWrite);
		CloseHandle(hRead);   
		return;
	}
	WaitForSingleObject(pi.hProcess,INFINITE);
	//   Close   process   and   thread   handles.       
	CloseHandle(pi.hProcess);
	CloseHandle(pi.hThread);
	CloseHandle(hWrite);
	memset(buffer, 0, 1024);
	while(ReadFile(hRead, buffer, 1024, &bytesRead, NULL))
	{
		PRINTLOG(buffer);
		memset(buffer, 0, 1024);
	}
	CloseHandle(hRead);

char buf_ps[1024];   
	char ps[1024]={0};
	char result[1024];
	FILE *ptr;
	strcpy(ps, command);
	if((ptr=popen(ps, "r"))!=NULL)   
	{   
		while(fgets(buf_ps, 1024, ptr)!=NULL)
		{   
			strcat(result, buf_ps);   
			if(strlen(result)>1024)   
				break;   
		}   
		pclose(ptr);   
		ptr = NULL;   
	}   
	else  
	{
		printf("popen %s error\n", ps);   
	}

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