这人多，问个windows下向命令行程序发送字符的问题。

1万 · 2009-5-11 12:20

用VC 做了个外壳程序A，调用一个JTAG编程的命令行程序B，并且不显示B的界面。

B的显示信息通过管道已经可以在A上显示，但讨厌的是B运行过程中居然要求用户确认（Y或者N回车），如何实现？
我又建了一个管道想让A写，B作为input，但是好像不行，运行后连B的信息都不能显示到A上了，晕！

CString CAVRJtag::InvokeJTAG(CString sExeFile,CString sPara,DWORD * dwError)
{
    CString sResult="";
    CString sPath;

    sPath=sExeFile;//执行文件名称
    sPath+=" ";
    sPath+=sPara;//参数
    //执行文件

    *dwError=0;

    LPPROCESS_INFORMATION lppi;
    PROCESS_INFORMATION pi;
    HANDLE hReadPipe,hWritePipe;
    HANDLE hReadPipe1,hWritePipe1;
    SECURITY_ATTRIBUTES lsa,lsa1;
    STARTUPINFO    si;

    lsa.nLength=sizeof(SECURITY_ATTRIBUTES);
    lsa.lpSecurityDescriptor=NULL;
    lsa.bInheritHandle=TRUE;
    lsa1.nLength=sizeof(SECURITY_ATTRIBUTES);
    lsa1.lpSecurityDescriptor=NULL;
    lsa1.bInheritHandle=TRUE;

    lppi=π
    if (!CreatePipe(&hReadPipe,&hWritePipe,&lsa,0))//dos程序写，本程序读取
    // create the pipe for output
    {
        //AfxMessageBox("Could't create Pipe\n");
        *dwError=1;
        return sResult;
    }
    if (!CreatePipe(&hReadPipe1,&hWritePipe1,&lsa1,0))//本程序写，DOS程序读取
    // create the pipe for input
    {
        //AfxMessageBox("Could't create Pipe\n");
        *dwError=1;
        return sResult;
    }

    memset(&si,0,sizeof(STARTUPINFO));
    si.cb=sizeof(STARTUPINFO);
    //important part-making SW_HIDE we prevent console to open up
    si.dwFlags=STARTF_USESTDHANDLES| STARTF_USESHOWWINDOW;
    si.wShowWindow=SW_HIDE;
    si.hStdOutput=hWritePipe;
    //si.hStdInput=hReadPipe1; //这句一加上连第一个管道都通讯不上了
    BOOL rst;
    rst=CreateProcess(NULL,sPath.GetBuffer(0),    NULL,    NULL,
        TRUE,    0,    NULL,NULL,    &si,    &pi);
    DWORD dg=GetLastError();
    if (!rst)
    {
        *dwError=1;
        //AfxMessageBox("Could't Create process\r\n");
        return sResult;
    }
    DWORD cchReadBuffer;//number of bytes read or to be writen
    CString sText;
    TCHAR ph[5000];
    for(;;)
    {
        cchReadBuffer=0;
        if(PeekNamedPipe(hReadPipe,ph,1,&cchReadBuffer,NULL,NULL))
        //ReadFile is blocking call so we should first
        //check if we have something to read break;
        if(cchReadBuffer)
        {//yes we do ,so read it and print out to the edit ctrl
            if(!ReadFile(hReadPipe,    ph,    4096,&cchReadBuffer,//number of bytes actually read
                NULL))
            {
                break;
            }
            CString strTmp="";
            ph[cchReadBuffer]=0;
            strTmp=ph;
            sResult+=strTmp;
            if(sResult.Find("Are you still want to continue")!=-1)//&&sResult.Find("Yes\\No?")!=-1)
            {
                Sleep(100);
                char buf[10];
                buf[0]='N';buf[1]=13;buf[2]=10;buf[3]=0;
                DWORD bw;
                WriteFile(hWritePipe1,buf,4,&bw,NULL);
            }
        }
        else
        {    //no we don't have anything in the buffer
            //maybe the program exited
            if(WaitForSingleObject(pi.hProcess,0)==WAIT_OBJECT_0)
                break;     //so we should exit either
        }
        Sleep(50);
        //continue otherwise
    }
    ph[cchReadBuffer]=0;
    sResult+=ph;
    CloseHandle(hReadPipe);
    CloseHandle(pi.hThread);
    CloseHandle(pi.hProcess);
    CloseHandle(hWritePipe);
    return sResult;
}