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.
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10 * modification, are permitted provided that the following conditions
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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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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.
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39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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50 *
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55 */
56
57 import java.io.IOException;
58 import org.apache.commons.net.bsd.RExecClient;
59
60 /****
61 * This is an example program demonstrating how to use the RExecClient class.
62 * This program connects to an rexec server and requests that the
63 * given command be executed on the server. It then reads input from stdin
64 * (this will be line buffered on most systems, so don't expect character
65 * at a time interactivity), passing it to the remote process and writes
66 * the process stdout and stderr to local stdout.
67 * <p>
68 * Example: java rexec myhost myusername mypassword "ps -aux"
69 * <p>
70 * Usage: rexec <hostname> <username> <password> <command>
71 * <p>
72 ***/
73
74 // This class requires the IOUtil support class!
75 public final class rexec
76 {
77
78 public static final void main(String[] args)
79 {
80 String server, username, password, command;
81 RExecClient client;
82
83 if (args.length != 4)
84 {
85 System.err.println(
86 "Usage: rexec <hostname> <username> <password> <command>");
87 System.exit(1);
88 return ; // so compiler can do proper flow control analysis
89 }
90
91 client = new RExecClient();
92
93 server = args[0];
94 username = args[1];
95 password = args[2];
96 command = args[3];
97
98 try
99 {
100 client.connect(server);
101 }
102 catch (IOException e)
103 {
104 System.err.println("Could not connect to server.");
105 e.printStackTrace();
106 System.exit(1);
107 }
108
109 try
110 {
111 client.rexec(username, password, command);
112 }
113 catch (IOException e)
114 {
115 try
116 {
117 client.disconnect();
118 }
119 catch (IOException f)
120 {}
121 e.printStackTrace();
122 System.err.println("Could not execute command.");
123 System.exit(1);
124 }
125
126
127 IOUtil.readWrite(client.getInputStream(), client.getOutputStream(),
128 System.in, System.out);
129
130 try
131 {
132 client.disconnect();
133 }
134 catch (IOException e)
135 {
136 e.printStackTrace();
137 System.exit(1);
138 }
139
140 System.exit(0);
141 }
142
143 }
144
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