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    1   package examples;
    2
    3   /* ====================================================================
    4    * The Apache Software License, Version 1.1
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    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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