Mon, 02 Jul 2018 16:43:07 +0100
Merge
jlaskey@3 | 1 | /* |
sundar@851 | 2 | * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
attila@962 | 3 | * |
jlaskey@3 | 4 | * Redistribution and use in source and binary forms, with or without |
jlaskey@3 | 5 | * modification, are permitted provided that the following conditions |
jlaskey@3 | 6 | * are met: |
attila@962 | 7 | * |
jlaskey@3 | 8 | * - Redistributions of source code must retain the above copyright |
jlaskey@3 | 9 | * notice, this list of conditions and the following disclaimer. |
attila@962 | 10 | * |
jlaskey@3 | 11 | * - Redistributions in binary form must reproduce the above copyright |
jlaskey@3 | 12 | * notice, this list of conditions and the following disclaimer in the |
jlaskey@3 | 13 | * documentation and/or other materials provided with the distribution. |
attila@962 | 14 | * |
jlaskey@3 | 15 | * - Neither the name of Oracle nor the names of its |
jlaskey@3 | 16 | * contributors may be used to endorse or promote products derived |
jlaskey@3 | 17 | * from this software without specific prior written permission. |
attila@962 | 18 | * |
jlaskey@3 | 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
jlaskey@3 | 20 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
jlaskey@3 | 21 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
jlaskey@3 | 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
jlaskey@3 | 23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
jlaskey@3 | 24 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
jlaskey@3 | 25 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
jlaskey@3 | 26 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
jlaskey@3 | 27 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
jlaskey@3 | 28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
jlaskey@3 | 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
jlaskey@3 | 30 | */ |
jlaskey@3 | 31 | |
sundar@851 | 32 | // Usage: jjs shell.js |
sundar@851 | 33 | |
sundar@851 | 34 | /* This is a simple shell tool in JavaScript. |
jlaskey@3 | 35 | * |
jlaskey@3 | 36 | * Runs any operating system command using Java "exec". When "eval" command is |
jlaskey@3 | 37 | * used, evaluates argument(s) as JavaScript code. |
jlaskey@3 | 38 | */ |
jlaskey@3 | 39 | |
sundar@851 | 40 | (function() { |
sundar@851 | 41 | // Java classes used |
sundar@851 | 42 | var Arrays = Java.type("java.util.Arrays"); |
sundar@851 | 43 | var BufferedReader = Java.type("java.io.BufferedReader"); |
sundar@851 | 44 | var InputStreamReader = Java.type("java.io.InputStreamReader"); |
sundar@851 | 45 | var ProcessBuilder = Java.type("java.lang.ProcessBuilder"); |
sundar@851 | 46 | var System = Java.type("java.lang.System"); |
jlaskey@3 | 47 | |
sundar@851 | 48 | // print prompt |
sundar@851 | 49 | function prompt() { |
sundar@851 | 50 | System.out.print("> "); |
sundar@851 | 51 | } |
jlaskey@3 | 52 | |
sundar@851 | 53 | var reader = new BufferedReader(new InputStreamReader(System.in)); |
jlaskey@3 | 54 | prompt(); |
sundar@851 | 55 | // read and evaluate each line from stdin |
sundar@851 | 56 | reader.lines().forEach(function(line) { |
sundar@851 | 57 | if (! line.isEmpty()) { |
sundar@851 | 58 | var args = line.split(' '); |
jlaskey@3 | 59 | try { |
sundar@851 | 60 | // special 'eval' command to evaluate JS code |
sundar@851 | 61 | if (args[0] == 'eval') { |
sundar@851 | 62 | var code = line.substring('eval'.length); |
jlaskey@3 | 63 | var res = eval(code); |
jlaskey@3 | 64 | if (res != undefined) { |
jlaskey@3 | 65 | print(res); |
jlaskey@3 | 66 | } |
jlaskey@3 | 67 | } else { |
sundar@851 | 68 | // build child process and start it! |
attila@1239 | 69 | new ProcessBuilder(Arrays.asList(args)) |
sundar@851 | 70 | .inheritIO() |
sundar@851 | 71 | .start() |
sundar@851 | 72 | .waitFor(); |
jlaskey@3 | 73 | } |
jlaskey@3 | 74 | } catch (e) { |
sundar@851 | 75 | // print exception, if any |
jlaskey@3 | 76 | print(e); |
jlaskey@3 | 77 | } |
jlaskey@3 | 78 | } |
jlaskey@3 | 79 | prompt(); |
sundar@851 | 80 | }) |
sundar@851 | 81 | })() |