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1 package examples; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache Commons" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 57 import java.io.IOException; 58 import org.apache.commons.net.bsd.RLoginClient; 59 60 /**** 61 * This is an example program demonstrating how to use the RLoginClient 62 * class. This program connects to an rlogin daemon and begins to 63 * interactively read input from stdin (this will be line buffered on most 64 * systems, so don't expect character at a time interactivity), passing it 65 * to the remote login process and writing the remote stdout and stderr 66 * to local stdout. If you don't have .rhosts or hosts.equiv files set up, 67 * the rlogin daemon will prompt you for a password. 68 * <p> 69 * On Unix systems you will not be able to use the rshell capability 70 * unless the process runs as root since only root can bind port addresses 71 * lower than 1024. 72 * <p> 73 * JVM's using green threads will likely have problems if the rlogin daemon 74 * requests a password. This program is merely a demonstration and is 75 * not suitable for use as an application, especially given that it relies 76 * on line buffered input from System.in. The best way to run this example 77 * is probably from a Win95 dos box into a Unix host. 78 * <p> 79 * Example: java rlogin myhost localusername remoteusername vt100 80 * <p> 81 * Usage: rlogin <hostname> <localuser> <remoteuser> <terminal> 82 * <p> 83 ***/ 84 85 // This class requires the IOUtil support class! 86 public final class rlogin 87 { 88 89 public static final void main(String[] args) 90 { 91 String server, localuser, remoteuser, terminal; 92 RLoginClient client; 93 94 if (args.length != 4) 95 { 96 System.err.println( 97 "Usage: rlogin <hostname> <localuser> <remoteuser> <terminal>"); 98 System.exit(1); 99 return ; // so compiler can do proper flow control analysis 100 } 101 102 client = new RLoginClient(); 103 104 server = args[0]; 105 localuser = args[1]; 106 remoteuser = args[2]; 107 terminal = args[3]; 108 109 try 110 { 111 client.connect(server); 112 } 113 catch (IOException e) 114 { 115 System.err.println("Could not connect to server."); 116 e.printStackTrace(); 117 System.exit(1); 118 } 119 120 try 121 { 122 client.rlogin(localuser, remoteuser, terminal); 123 } 124 catch (IOException e) 125 { 126 try 127 { 128 client.disconnect(); 129 } 130 catch (IOException f) 131 {} 132 e.printStackTrace(); 133 System.err.println("rlogin authentication failed."); 134 System.exit(1); 135 } 136 137 138 IOUtil.readWrite(client.getInputStream(), client.getOutputStream(), 139 System.in, System.out); 140 141 try 142 { 143 client.disconnect(); 144 } 145 catch (IOException e) 146 { 147 e.printStackTrace(); 148 System.exit(1); 149 } 150 151 System.exit(0); 152 } 153 154 } 155

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