shell.js revision 2:da1e581c933b 
1/*
2 * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 *   - Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 *
11 *   - Redistributions in binary form must reproduce the above copyright
12 *     notice, this list of conditions and the following disclaimer in the
13 *     documentation and/or other materials provided with the distribution.
14 *
15 *   - Neither the name of Oracle nor the names of its
16 *     contributors may be used to endorse or promote products derived
17 *     from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/**
33 * This is a simple shell tool in JavaScript.
34 *
35 * Runs any operating system command using Java "exec". When "eval" command is
36 * used, evaluates argument(s) as JavaScript code.
37 */
38
39var imports = new JavaImporter(java.io, java.lang, java.util);
40
41function prompt() {
42    java.lang.System.out.print(">");
43}
44
45with (imports) {
46    var reader = new BufferedReader(new InputStreamReader(System["in"]));
47    var line = null;
48    prompt();
49    while ((line = reader.readLine()) != null) {
50        if (line != "") {
51            var args = line.split(" ");
52            try {
53                if (args[0] == "eval") {
54                    var code = line.substring("eval".length);
55                    var res = eval(code);
56                    if (res != undefined) {
57                        print(res);
58                    }
59                } else {
60                    var argList = new ArrayList();
61                    for (i in args) { argList.add(args[i]); }
62                    var procBuilder = new ProcessBuilder(argList);
63                    procBuilder.redirectErrorStream();
64                    var proc = procBuilder.start();
65                    var out = new BufferedReader(new InputStreamReader(proc.getInputStream()));
66                    var line = null;
67                    while ((line = out.readLine()) != null) {
68                        System.out.println(line);
69                    }
70                    proc.waitFor();
71                }
72            } catch (e) {
73                print(e);
74            }
75        }
76        prompt();
77    }
78}
79