Coverage report

  %line %branch
examples.rshell
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 1  
 /*
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  * Copyright 2001-2005 The Apache Software Foundation
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  *
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  * Licensed under the Apache License, Version 2.0 (the "License");
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  * you may not use this file except in compliance with the License.
 6  
  * You may obtain a copy of the License at
 7  
  *
 8  
  *     http://www.apache.org/licenses/LICENSE-2.0
 9  
  *
 10  
  * Unless required by applicable law or agreed to in writing, software
 11  
  * distributed under the License is distributed on an "AS IS" BASIS,
 12  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 13  
  * See the License for the specific language governing permissions and
 14  
  * limitations under the License.
 15  
  */
 16  
 package examples;
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 18  
 import java.io.IOException;
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 import org.apache.commons.net.bsd.RCommandClient;
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 21  
 /***
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  * This is an example program demonstrating how to use the RCommandClient
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  * class. This program connects to an rshell daemon and requests that the
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  * given command be executed on the server.  It then reads input from stdin
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  * (this will be line buffered on most systems, so don't expect character
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  * at a time interactivity), passing it to the remote process and writes
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  * the process stdout and stderr to local stdout.
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  * <p>
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  * On Unix systems you will not be able to use the rshell capability
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  * unless the process runs as root since only root can bind port addresses
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  * lower than 1024.
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  * <p>
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  * Example: java rshell myhost localusername remoteusername "ps -aux"
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  * <p>
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  * Usage: rshell <hostname> <localuser> <remoteuser> <command>
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  * <p>
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  ***/
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 39  
 // This class requires the IOUtil support class!
 40  0
 public final class rshell
 41  
 {
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 43  
     public static final void main(String[] args)
 44  
     {
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         String server, localuser, remoteuser, command;
 46  
         RCommandClient client;
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 48  0
         if (args.length != 4)
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         {
 50  0
             System.err.println(
 51  
                 "Usage: rshell <hostname> <localuser> <remoteuser> <command>");
 52  0
             System.exit(1);
 53  0
             return ; // so compiler can do proper flow control analysis
 54  
         }
 55  
 
 56  0
         client = new RCommandClient();
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 58  0
         server = args[0];
 59  0
         localuser = args[1];
 60  0
         remoteuser = args[2];
 61  0
         command = args[3];
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 63  
         try
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         {
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             client.connect(server);
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         }
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         catch (IOException e)
 68  
         {
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             System.err.println("Could not connect to server.");
 70  0
             e.printStackTrace();
 71  0
             System.exit(1);
 72  0
         }
 73  
 
 74  
         try
 75  
         {
 76  0
             client.rcommand(localuser, remoteuser, command);
 77  
         }
 78  0
         catch (IOException e)
 79  
         {
 80  
             try
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             {
 82  0
                 client.disconnect();
 83  
             }
 84  0
             catch (IOException f)
 85  0
             {}
 86  0
             e.printStackTrace();
 87  0
             System.err.println("Could not execute command.");
 88  0
             System.exit(1);
 89  0
         }
 90  
 
 91  
 
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         IOUtil.readWrite(client.getInputStream(), client.getOutputStream(),
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                          System.in, System.out);
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 95  
         try
 96  
         {
 97  0
             client.disconnect();
 98  
         }
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         catch (IOException e)
 100  
         {
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             e.printStackTrace();
 102  0
             System.exit(1);
 103  0
         }
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 105  0
         System.exit(0);
 106  0
     }
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 108  
 }
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