author | ntoda |
Thu, 31 Jul 2014 17:01:24 -0700 | |
changeset 25799 | 1afc4675dc75 |
parent 24283 | bda887c0088a |
child 26067 | b32ccc3a76c9 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* - Neither the name of Oracle nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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||
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// Usage: jjs shell.js |
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/* This is a simple shell tool in JavaScript. |
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* |
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* Runs any operating system command using Java "exec". When "eval" command is |
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* used, evaluates argument(s) as JavaScript code. |
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*/ |
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(function() { |
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// Java classes used |
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var Arrays = Java.type("java.util.Arrays"); |
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var BufferedReader = Java.type("java.io.BufferedReader"); |
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var InputStreamReader = Java.type("java.io.InputStreamReader"); |
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var ProcessBuilder = Java.type("java.lang.ProcessBuilder"); |
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var System = Java.type("java.lang.System"); |
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// print prompt |
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function prompt() { |
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System.out.print("> "); |
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} |
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var reader = new BufferedReader(new InputStreamReader(System.in)); |
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prompt(); |
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// read and evaluate each line from stdin |
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reader.lines().forEach(function(line) { |
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if (! line.isEmpty()) { |
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var args = line.split(' '); |
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try { |
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// special 'eval' command to evaluate JS code |
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if (args[0] == 'eval') { |
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var code = line.substring('eval'.length); |
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var res = eval(code); |
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if (res != undefined) { |
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print(res); |
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} |
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} else { |
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// build child process and start it! |
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new ProcessBuilder(Arrays.asList(args)) |
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.inheritIO() |
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.start() |
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.waitFor(); |
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} |
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} catch (e) { |
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// print exception, if any |
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print(e); |
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} |
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} |
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prompt(); |
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}) |
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})() |