try putting pr.waitFor() after
Process pr=run.exec("ssh -l <usrname> -p <portname> <ip address>");

it waits for the process to get executed before executing next statement.

HTH,
uthiresh


-----Original Message-----
From: A mailing list for Java(tm) 2 Platform, Enterprise Edition
[mailto:J2EE-INTEREST@(protected)
Sent: Monday, July 28, 2003 12:25 PM
To: J2EE-INTEREST@(protected)
Subject: use of RunTime class


Hi Group,
  We are developing an application which requires connecting to the remote
server using ssh protocol. If I have to connect to that server from command
prompt then I type command something like below,

    ssh -l <usrname> -p <portname> <ip address>
    Then the system shows following line
    <Hostname> password:


  Then the remote server ask for password (We don't want to use public and
private key automatic validation) ,which I enter manually and I get the
connection to the remote server.

  Now the same functionality we want to duplicate in a java program. So we
thought of using Runtime class to execute the command mentioned above. The
sample code for that is given below


  import java.io.*;

  public class one{

     public one() throws Exception{
        Runtime run=Runtime.getRuntime();
        System.out.println("came here up");
        Process pr=run.exec("ssh -l <usrname> -p <portname> <ip
address>");
        System.out.println("came here down");
        InputStream in=pr.getInputStream();
        System.out.println(in.available());
        BufferedReader buff=new BufferedReader(new
InputStreamReader(pr.getInputStream()));
        System.out.println("1");
        String line=buff.readLine();
        System.out.println("2");
        System.out.println(line);
      }

     public static void main(String a[]){
        try{
            new one();
        }catch(Exception ee){
            ee.printStackTrace();
        }
     }

  }//end of class


  We are getting output till 'System.out.println("1")' , but the '
System.out.println("2") ' is not coming at all on the screen. The process
remains in the hanged status and I think it expects some user input. But I
don't understand why it is not printing '<Hostname> password:     ' line
though I am capturing the input stream of the process.


  Can anyone tell me why this is happening. If anybody has already
implemented such kind of functionality where 'java program will supply the
password to connect to the remote server' then kindly suggest us how to do
that.

Thanx in advance

Prashant

===========================================================================
To unsubscribe, send email to listserv@(protected)
of the message "signoff J2EE-INTEREST". For general help, send email to
listserv@(protected)".