| /* |
| * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| // Usage: jjs shell.js |
| |
| /* This is a simple shell tool in JavaScript. |
| * |
| * Runs any operating system command using Java "exec". When "eval" command is |
| * used, evaluates argument(s) as JavaScript code. |
| */ |
| |
| (function() { |
| // Java classes used |
| var Arrays = Java.type("java.util.Arrays"); |
| var BufferedReader = Java.type("java.io.BufferedReader"); |
| var InputStreamReader = Java.type("java.io.InputStreamReader"); |
| var ProcessBuilder = Java.type("java.lang.ProcessBuilder"); |
| var System = Java.type("java.lang.System"); |
| |
| // print prompt |
| function prompt() { |
| System.out.print("> "); |
| } |
| |
| var reader = new BufferedReader(new InputStreamReader(System.in)); |
| prompt(); |
| // read and evaluate each line from stdin |
| reader.lines().forEach(function(line) { |
| if (! line.isEmpty()) { |
| var args = line.split(' '); |
| try { |
| // special 'eval' command to evaluate JS code |
| if (args[0] == 'eval') { |
| var code = line.substring('eval'.length); |
| var res = eval(code); |
| if (res != undefined) { |
| print(res); |
| } |
| } else { |
| // build child process and start it! |
| new ProcessBuilder(Arrays.asList(args)) |
| .inheritIO() |
| .start() |
| .waitFor(); |
| } |
| } catch (e) { |
| // print exception, if any |
| print(e); |
| } |
| } |
| prompt(); |
| }) |
| })() |