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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.RCommandClient; 59 60 /**** 61 * This is an example program demonstrating how to use the RCommandClient 62 * class. This program connects to an rshell daemon 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 * On Unix systems you will not be able to use the rshell capability 69 * unless the process runs as root since only root can bind port addresses 70 * lower than 1024. 71 * <p> 72 * Example: java rshell myhost localusername remoteusername "ps -aux" 73 * <p> 74 * Usage: rshell <hostname> <localuser> <remoteuser> <command> 75 * <p> 76 ***/ 77 78 // This class requires the IOUtil support class! 79 public final class rshell 80 { 81 82 public static final void main(String[] args) 83 { 84 String server, localuser, remoteuser, command; 85 RCommandClient client; 86 87 if (args.length != 4) 88 { 89 System.err.println( 90 "Usage: rshell <hostname> <localuser> <remoteuser> <command>"); 91 System.exit(1); 92 return ; // so compiler can do proper flow control analysis 93 } 94 95 client = new RCommandClient(); 96 97 server = args[0]; 98 localuser = args[1]; 99 remoteuser = args[2]; 100 command = args[3]; 101 102 try 103 { 104 client.connect(server); 105 } 106 catch (IOException e) 107 { 108 System.err.println("Could not connect to server."); 109 e.printStackTrace(); 110 System.exit(1); 111 } 112 113 try 114 { 115 client.rcommand(localuser, remoteuser, command); 116 } 117 catch (IOException e) 118 { 119 try 120 { 121 client.disconnect(); 122 } 123 catch (IOException f) 124 {} 125 e.printStackTrace(); 126 System.err.println("Could not execute command."); 127 System.exit(1); 128 } 129 130 131 IOUtil.readWrite(client.getInputStream(), client.getOutputStream(), 132 System.in, System.out); 133 134 try 135 { 136 client.disconnect(); 137 } 138 catch (IOException e) 139 { 140 e.printStackTrace(); 141 System.exit(1); 142 } 143 144 System.exit(0); 145 } 146 147 } 148

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