Mercurial > hg > graal-jvmci-8
view graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/core/SystemNode.java @ 13736:64fa70319890
Merge with 9161ed8ce7964ca3df5e91894522b207a2bc4a3e
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Wed, 22 Jan 2014 21:34:00 -0800 |
parents | 0fbee3eb71f0 |
children |
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/* * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This * code is released under a tri EPL/GPL/LGPL license. You can use it, * redistribute it and/or modify it under the terms of the: * * Eclipse Public License version 1.0 * GNU General Public License version 2 * GNU Lesser General Public License version 2.1 */ package com.oracle.truffle.ruby.nodes.core; import java.io.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.nodes.*; import com.oracle.truffle.ruby.nodes.*; import com.oracle.truffle.ruby.runtime.*; /** * Represents an expression that is evaluated by running it as a system command via forking and * execing, and then taking stdout as a string. */ @NodeInfo(shortName = "system") public class SystemNode extends RubyNode { @Child protected RubyNode child; public SystemNode(RubyContext context, SourceSection sourceSection, RubyNode child) { super(context, sourceSection); this.child = adoptChild(child); } @Override public Object execute(VirtualFrame frame) { final RubyContext context = getContext(); final String command = child.execute(frame).toString(); Process process; try { // We need to run via bash to get the variable and other expansion we expect process = Runtime.getRuntime().exec(new String[]{"bash", "-c", command}); } catch (IOException e) { throw new RuntimeException(e); } final InputStream stdout = process.getInputStream(); final BufferedReader reader = new BufferedReader(new InputStreamReader(stdout)); final StringBuilder resultBuilder = new StringBuilder(); String line; // TODO(cs): this isn't great for binary output try { while ((line = reader.readLine()) != null) { resultBuilder.append(line); resultBuilder.append("\n"); } } catch (IOException e) { throw new RuntimeException(e); } return context.makeString(resultBuilder.toString()); } }