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examples.rexec |
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1 | /* |
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2 | * Copyright 2001-2005 The Apache Software Foundation |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package examples; |
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17 | ||
18 | import java.io.IOException; |
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19 | import org.apache.commons.net.bsd.RExecClient; |
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20 | ||
21 | /*** |
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22 | * This is an example program demonstrating how to use the RExecClient class. |
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23 | * This program connects to an rexec server and requests that the |
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24 | * given command be executed on the server. It then reads input from stdin |
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25 | * (this will be line buffered on most systems, so don't expect character |
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26 | * at a time interactivity), passing it to the remote process and writes |
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27 | * the process stdout and stderr to local stdout. |
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28 | * <p> |
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29 | * Example: java rexec myhost myusername mypassword "ps -aux" |
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30 | * <p> |
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31 | * Usage: rexec <hostname> <username> <password> <command> |
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32 | * <p> |
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33 | ***/ |
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34 | ||
35 | // This class requires the IOUtil support class! |
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36 | 0 | public final class rexec |
37 | { |
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38 | ||
39 | public static final void main(String[] args) |
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40 | { |
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41 | String server, username, password, command; |
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42 | RExecClient client; |
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43 | ||
44 | 0 | if (args.length != 4) |
45 | { |
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46 | 0 | System.err.println( |
47 | "Usage: rexec <hostname> <username> <password> <command>"); |
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48 | 0 | System.exit(1); |
49 | 0 | return ; // so compiler can do proper flow control analysis |
50 | } |
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51 | ||
52 | 0 | client = new RExecClient(); |
53 | ||
54 | 0 | server = args[0]; |
55 | 0 | username = args[1]; |
56 | 0 | password = args[2]; |
57 | 0 | command = args[3]; |
58 | ||
59 | try |
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60 | { |
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61 | 0 | client.connect(server); |
62 | } |
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63 | 0 | catch (IOException e) |
64 | { |
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65 | 0 | System.err.println("Could not connect to server."); |
66 | 0 | e.printStackTrace(); |
67 | 0 | System.exit(1); |
68 | 0 | } |
69 | ||
70 | try |
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71 | { |
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72 | 0 | client.rexec(username, password, command); |
73 | } |
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74 | 0 | catch (IOException e) |
75 | { |
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76 | try |
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77 | { |
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78 | 0 | client.disconnect(); |
79 | } |
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80 | 0 | catch (IOException f) |
81 | 0 | {} |
82 | 0 | e.printStackTrace(); |
83 | 0 | System.err.println("Could not execute command."); |
84 | 0 | System.exit(1); |
85 | 0 | } |
86 | ||
87 | ||
88 | 0 | IOUtil.readWrite(client.getInputStream(), client.getOutputStream(), |
89 | System.in, System.out); |
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90 | ||
91 | try |
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92 | { |
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93 | 0 | client.disconnect(); |
94 | } |
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95 | 0 | catch (IOException e) |
96 | { |
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97 | 0 | e.printStackTrace(); |
98 | 0 | System.exit(1); |
99 | 0 | } |
100 | ||
101 | 0 | System.exit(0); |
102 | 0 | } |
103 | ||
104 | } |
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105 |
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