1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package examples; 19 20 import java.io.IOException; 21 import org.apache.commons.net.bsd.RExecClient; 22 23 /*** 24 * This is an example program demonstrating how to use the RExecClient class. 25 * This program connects to an rexec server and requests that the 26 * given command be executed on the server. It then reads input from stdin 27 * (this will be line buffered on most systems, so don't expect character 28 * at a time interactivity), passing it to the remote process and writes 29 * the process stdout and stderr to local stdout. 30 * <p> 31 * Example: java rexec myhost myusername mypassword "ps -aux" 32 * <p> 33 * Usage: rexec <hostname> <username> <password> <command> 34 * <p> 35 ***/ 36 37 // This class requires the IOUtil support class! 38 public final class rexec 39 { 40 41 public static final void main(String[] args) 42 { 43 String server, username, password, command; 44 RExecClient client; 45 46 if (args.length != 4) 47 { 48 System.err.println( 49 "Usage: rexec <hostname> <username> <password> <command>"); 50 System.exit(1); 51 return ; // so compiler can do proper flow control analysis 52 } 53 54 client = new RExecClient(); 55 56 server = args[0]; 57 username = args[1]; 58 password = args[2]; 59 command = args[3]; 60 61 try 62 { 63 client.connect(server); 64 } 65 catch (IOException e) 66 { 67 System.err.println("Could not connect to server."); 68 e.printStackTrace(); 69 System.exit(1); 70 } 71 72 try 73 { 74 client.rexec(username, password, command); 75 } 76 catch (IOException e) 77 { 78 try 79 { 80 client.disconnect(); 81 } 82 catch (IOException f) 83 {} 84 e.printStackTrace(); 85 System.err.println("Could not execute command."); 86 System.exit(1); 87 } 88 89 90 IOUtil.readWrite(client.getInputStream(), client.getOutputStream(), 91 System.in, System.out); 92 93 try 94 { 95 client.disconnect(); 96 } 97 catch (IOException e) 98 { 99 e.printStackTrace(); 100 System.exit(1); 101 } 102 103 System.exit(0); 104 } 105 106 } 107