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What this is

This file is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

 * Copyright 2001-2004 The Apache Software Foundation
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package examples;


 * This is an example program demonstrating how to use the RCommandClient
 * class. This program connects to an rshell daemon and requests that the
 * given command be executed on the server.  It then reads input from stdin
 * (this will be line buffered on most systems, so don't expect character
 * at a time interactivity), passing it to the remote process and writes
 * the process stdout and stderr to local stdout.

* On Unix systems you will not be able to use the rshell capability * unless the process runs as root since only root can bind port addresses * lower than 1024. *

* Example: java rshell myhost localusername remoteusername "ps -aux" *

* Usage: rshell *

***/ // This class requires the IOUtil support class! public final class rshell { public static final void main(String[] args) { String server, localuser, remoteuser, command; RCommandClient client; if (args.length != 4) { System.err.println( "Usage: rshell "); System.exit(1); return ; // so compiler can do proper flow control analysis } client = new RCommandClient(); server = args[0]; localuser = args[1]; remoteuser = args[2]; command = args[3]; try { client.connect(server); } catch (IOException e) { System.err.println("Could not connect to server."); e.printStackTrace(); System.exit(1); } try { client.rcommand(localuser, remoteuser, command); } catch (IOException e) { try { client.disconnect(); } catch (IOException f) {} e.printStackTrace(); System.err.println("Could not execute command."); System.exit(1); } IOUtil.readWrite(client.getInputStream(), client.getOutputStream(),, System.out); try { client.disconnect(); } catch (IOException e) { e.printStackTrace(); System.exit(1); } System.exit(0); } }

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