Running an Interactive External Process

Question

I am trying to run an Interactive external process.
This process is an exe program.
When I run this program it prompts for a password.
Here the reader.read() is never gets to a ready state.
Following is a snippet of the program
public class StreamGobler extends Thread{
private InputStream is;
private OutputStream os;
private String pwd;
private int waitState = 1;
public StreamGobler(InputStream _is, OutputStream _os, String _pwd)   {
        this.is = _is;
        this.os = _os;
        this.pwd = _pwd;
     public void run() {
        BufferedReader reader = null;
        BufferedWriter writer = null;
        try {
            reader = new BufferedReader(new InputStreamReader(is));
            writer = new BufferedWriter(new OutputStreamWriter(os));
            String msg = "";
            int c=0;
            //This is where my program get blocked it never enters the while block and eventually timesout               
            while ((c = reader.read()) != -1) {            
     msg += (char) c;
     if (waitState == 1) {                 
        if(msg != null && msg.toLowerCase().indexOf("password") != -1){
     writer.write(pwd+ "\n");                    writer.flush();                         waitState++;                    msg = "";
                   }else{
       buffer.append((char) c);              
        catch (Exception ee) {}       
        finally {
            try {
     if (reader != null)
         reader.close();
     if (writer != null)
         writer.close();
           } catch (Exception ee) {}
Message was edited by:
        ff1012                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

Answer 1

You need to check with the vendor of this unspecified application to see if they have an api for remote control. Perhaps they have an ActiveX interface? If not, I've had very good luck with an application called AutoIT - https://www.autoitscript.com/site/autoit/
There are LabVIEW examples on the forum.