--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/builtins/SLReadlnBuiltin.java	Wed Jan 29 20:45:43 2014 -0800
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2014, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.sl.builtins;
+
+import java.io.*;
+
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.sl.*;
+import com.oracle.truffle.sl.runtime.*;
+
+/**
+ * Builtin function that reads a String from the {@link SLContext#getInput() standard input}.
+ */
+@NodeInfo(shortName = "readln")
+public abstract class SLReadlnBuiltin extends SLBuiltinNode {
+
+    @Specialization
+    public String readln() {
+        try {
+            String result = getContext().getInput().readLine();
+            if (result == null) {
+                /*
+                 * We do not have a sophisticated end of file handling, so returning an empty string
+                 * is a reasonable alternative. Note that the Java null value should never be used,
+                 * since it can interfere with the specialization logic in generated source code.
+                 */
+                result = "";
+            }
+            return result;
+        } catch (IOException ex) {
+            throw new SLException(ex.getMessage());
+        }
+    }
+}