Mon, 09 Nov 2015 13:45:10 -0800
Merge
1 /*
2 * Copyright (c) 2014, 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 */
32 // Usage: jjs shell.js
34 /* This is a simple shell tool in JavaScript.
35 *
36 * Runs any operating system command using Java "exec". When "eval" command is
37 * used, evaluates argument(s) as JavaScript code.
38 */
40 (function() {
41 // Java classes used
42 var Arrays = Java.type("java.util.Arrays");
43 var BufferedReader = Java.type("java.io.BufferedReader");
44 var InputStreamReader = Java.type("java.io.InputStreamReader");
45 var ProcessBuilder = Java.type("java.lang.ProcessBuilder");
46 var System = Java.type("java.lang.System");
48 // print prompt
49 function prompt() {
50 System.out.print("> ");
51 }
53 var reader = new BufferedReader(new InputStreamReader(System.in));
54 prompt();
55 // read and evaluate each line from stdin
56 reader.lines().forEach(function(line) {
57 if (! line.isEmpty()) {
58 var args = line.split(' ');
59 try {
60 // special 'eval' command to evaluate JS code
61 if (args[0] == 'eval') {
62 var code = line.substring('eval'.length);
63 var res = eval(code);
64 if (res != undefined) {
65 print(res);
66 }
67 } else {
68 // build child process and start it!
69 new ProcessBuilder(Arrays.asList(args))
70 .inheritIO()
71 .start()
72 .waitFor();
73 }
74 } catch (e) {
75 // print exception, if any
76 print(e);
77 }
78 }
79 prompt();
80 })
81 })()