Remotely executing server commands using rsh in Java

Overview 

       This article will demonstrate how to execute commands on a server using rsh service using Secure iNet Factory.

Code Example

      Download RSHEx.java

               

01 import com.jscape.inet.bsd.*; 02 import java.io.*; 03 04 public class RSHEx extends BsdAdapter 05 { 06  public void connected(BsdConnectedEvent event) 07  { 08  System.out.println("Connected to host: " + event.getHostname()); 09  } 10 11  public void disconnected(BsdDisconnectedEvent event) 12  { 13  System.out.println("Disconnected from host: " + event.getHostname()); 14  }     15   16  public static void main(String[] args) 17  { 18  Rsh rsh = new Rsh("remote.host.com", "johndoe", "johndoe","ls -la", false); 19  rsh.addBsdListener(new RSHEx()); 20  try 21  { 22  // establish connection 23  rsh.connect(); 24  // issue an rsh command 25  String cmd = "someRSHCommand"; 26  rsh.setCommand(cmd); 27  // execute command 28  rsh.execute(); 29  // get input stream 30  InputStream input = rsh.getInputStream(); 31  // read first byte to determine success or failure 32  int in = input.read(); 33  StringBuffer buffer = new StringBuffer(); 34  if(in == 0) buffer.append("Success! Remote host returned: \n"); 35  else        buffer.append("Failure! Remote host returned: \n"); 36  // read response        37  while((in = input.read()) != -1) buffer.append((char)in); 38  System.out.println(buffer.toString()); 39  } 40  catch(Exception e) 41  { 42  System.out.println(e); 43  } 44  } 45 } 46 Lines 1-2  : Necessary import statments. Lines 6-14 : Events from BsdAdapter Line 18    : Create an Rsh instance Line 19    : Add listener to this Rsh instance so this instance can              receive events from BsdAdapter Lines 25-28 : Set a rsh command and execute it Lines 30-38 : Read response and print it out to the console.