java -issue with runtime.exec

Hello all,

I have a unix box and am trying to do an ssh to itself using java. I am ausing the following code for that:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
class StreamGobbler extends Thread {
	InputStream is;
	String type;

	StreamGobbler(InputStream is, String type) {
		this.is = is;
		this.type = type;
	}

	public void run() {
		try {
			InputStreamReader isr = new InputStreamReader(is);
			BufferedReader br = new BufferedReader(isr);
			String line = null;
			while ((line = br.readLine()) != null)
				System.out.println(type + ">" + line);
		} catch (IOException ioe) {
			ioe.printStackTrace();
		}
	}
}
public class UnixExecTest {
	public static void main(String args[]) {

		try {
			String input = "test";

			while (!(input.equals("exit"))) {
				InputStreamReader isr = new InputStreamReader(System.in);
				BufferedReader stdin = new BufferedReader(isr);
				System.out.print("Enter command: ");
				input = stdin.readLine();
				System.out.println("input = " + input);

				String[] cmd = {"sh", "-c", input.trim()};

				Runtime rt = Runtime.getRuntime();
				System.out.println("Execing " + cmd);
				Process proc = rt.exec(cmd);

				StreamGobbler errorGobbler = new StreamGobbler(proc
						.getErrorStream(), "ERROR");

				StreamGobbler outputGobbler = new StreamGobbler(proc
						.getInputStream(), "OUTPUT");

				errorGobbler.start();
				outputGobbler.start();

				int exitVal = proc.waitFor();
				System.out.println("ExitValue: " + exitVal);
			}
		} catch (Throwable t) {
			t.printStackTrace();
		}
	}
}

Using the code above, I am able to execute the unix commands. All the basic commands like ps, ls, id etc gives perfect output. But when i try to do an "ssh ", I see an error message "Pseudo-terminal will not be allocated because stdin is not a terminal." Then after a couple of seconds, it shows me the welcome message like its supposed to be and asks for my password. as soon as I wnter my password, it gives me an error message like :

ttytype: couldn't open /dev/tty for reading
stty: : Not a typewriter
Not a terminal
Not a terminal
stty: : Not a typewriter
stty: : Not a typewriter
resize: Can't open terminal /dev/tty

and then looks like the program is hanging and doesnt do anything. I am expecting a unix promt to come up for entering commands. Any ideas on where i am going wrong ? I'd really appreciate any help.

Thank you !!

Let me paste the contents of the output screen once again:

ERROR>Pseudo-terminal will not be allocated because stdin is not a terminal.
ERROR>
ERROR>************************************************************************
ERROR>**                                                                    **
ERROR>**                     THIS SYSTEM IS RESTRICTED!                     **
ERROR>**                                                                    **
ERROR>**   You are authorized to use this system for approved business      **
ERROR>**   purposes only.  Use for any other purpose is prohibited.  All    **
ERROR>**   transactional records, reports, e-mail, software, and other      **
ERROR>**   data generated by or residing upon this system are the property  **
ERROR>**   of the Company and may be used by the Company for any purpose.   **
ERROR>**   Authorized and unauthorized activities may be monitored.         **
ERROR>**                                                                    **
ERROR>************************************************************************
ERROR>
ERROR>************************************************************************
ERROR>*                                                                      *
ERROR>*  CAUTION: You have reached a restricted access system.               *
ERROR>*           Unauthorized use of this system is prohibited and will     *
ERROR>*           be prosecuted to the fullest extent of the law.            *
ERROR>*                                                                      *
ERROR>************************************************************************
ERROR>

Enter user's Password:
ERROR>ttytype: couldn't open /dev/tty for reading
ERROR>stty: : Not a typewriter
ERROR>Not a terminal
ERROR>Not a terminal
ERROR>stty: : Not a typewriter
ERROR>stty: : Not a typewriter
ERROR>resize: Can't open terminal /dev/tty
OUTPUT>
OUTPUT>
OUTPUT>
OUTPUT>

pressley