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Java > Open Source Codes > org > jruby > environment > OSEnvironmentReaderFromRuntimeExec


1 /***** BEGIN LICENSE BLOCK *****
2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Common Public
5  * License Version 1.0 (the "License"); you may not use this file
6  * except in compliance with the License. You may obtain a copy of
7  * the License at http://www.eclipse.org/legal/cpl-v10.html
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10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
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13  *
14  * Copyright (C) 2006 Tim Azzopardi <tim@tigerfive.com>
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17  * either of the GNU General Public License Version 2 or later (the "GPL"),
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28
29 package org.jruby.environment;
30
31 import java.io.BufferedReader JavaDoc;
32 import java.io.IOException JavaDoc;
33 import java.io.InputStreamReader JavaDoc;
34 import java.util.Map JavaDoc;
35
36 import org.jruby.Ruby;
37
38 class OSEnvironmentReaderFromRuntimeExec implements IOSEnvironmentReader {
39
40     private final OSEnvironment environmentReader = new OSEnvironment();
41
42     /* (non-Javadoc)
43      * @see org.jruby.IOSEnvironment#isAccessible()
44      */
45     public boolean isAccessible(Ruby runtime) {
46         return true;
47     }
48     
49     
50     private String JavaDoc getEnvCommand() {
51         String JavaDoc command;
52         String JavaDoc osname = System.getProperty("os.name").toLowerCase();
53
54         // TODO merge this logic into RubyKernel.runInShell? / possible conflict if jruby.shell System property is set
55
56         if (osname.indexOf("windows 9") > -1) {
57             command = "command.com /c set";
58         } else if ((osname.indexOf("nt") > -1)
59                 || (osname.indexOf("windows 20") > -1)
60                 || (osname.indexOf("windows xp") > -1)) {
61             command = "cmd.exe /c set";
62         } else {
63             // Assume some unix variant with an env command
64 command = "env";
65         }
66         return command;
67     }
68     
69     
70     /*
71      * (non-Javadoc)
72      *
73      * @see org.jruby.IOSEnvironment#getVariables()
74      */
75     public Map JavaDoc getVariables(Ruby runtime) {
76         try {
77             Process JavaDoc process = Runtime.getRuntime().exec(getEnvCommand());
78             return environmentReader.getVariablesFrom(
79                     new BufferedReader JavaDoc(new InputStreamReader JavaDoc(process.getInputStream()))
80                     );
81         } catch (IOException JavaDoc e) {
82             environmentReader.handleException(e);
83         }
84         
85         return null;
86     }
87
88 }
89
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