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.
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28 * 4. The names "Apache" and "Apache Software Foundation" and
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32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * nor may "Apache" appear in their name, without
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36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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50 *
51 * This software consists of voluntary contributions made by many
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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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