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 */ 31 32 // Usage: jjs shell.js 33 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 */ 39 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"); 47 48 // print prompt 49 function prompt() { 50 System.out.print("> "); 51 } 52 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 })()