From 2f225795fc1e4a28a1bc5bf7d7fd7159320df1cf Mon Sep 17 00:00:00 2001
From: JET <jet@jet.ecovate.com>
Date: Mon, 2 Apr 2012 22:15:02 -0600
Subject: [PATCH] added RuntimePermission and System.getenv()

---
 classpath/java-lang.cpp                    | 29 +++++++++++++++++
 classpath/java/lang/RuntimePermission.java | 21 +++++++++++++
 classpath/java/lang/System.java            | 36 ++++++++++++++++++++++
 3 files changed, 86 insertions(+)
 create mode 100644 classpath/java/lang/RuntimePermission.java

diff --git a/classpath/java-lang.cpp b/classpath/java-lang.cpp
index bb087560fe..9e99dda6cf 100644
--- a/classpath/java-lang.cpp
+++ b/classpath/java-lang.cpp
@@ -631,6 +631,35 @@ Java_java_lang_System_getProperty(JNIEnv* e, jclass, jstring name,
   return r;
 }
 
+// System.getEnvironment() implementation
+// TODO: For Win32, replace usage of deprecated _wenviron
+#ifndef PLATFORM_WINDOWS
+extern char** environ;
+# else
+extern wchar_t** _wenviron;
+const wchar_t** environ = _wenviron;
+#endif
+extern "C" JNIEXPORT jobjectArray JNICALL
+Java_java_lang_System_getEnvironment(JNIEnv* env, jclass) {
+  int length;
+  for (length = 0; environ[length] != 0; ++length);
+
+  jobjectArray stringArray =
+    env->NewObjectArray(length, env->FindClass("java/lang/String"),
+                        env->NewStringUTF(""));
+
+  for (int i = 0; i < length; i++) {
+#ifndef PLATFORM_WINDOWS
+    jobject varString = env->NewStringUTF(environ[i]); // UTF-8
+#else
+    jobject varString = env->NewString(environ[i]);    // UTF-16
+#endif
+    env->SetObjectArrayElement(stringArray, i, varString);
+  }
+
+  return stringArray;
+}
+
 extern "C" JNIEXPORT jlong JNICALL
 Java_java_lang_System_currentTimeMillis(JNIEnv*, jclass)
 {
diff --git a/classpath/java/lang/RuntimePermission.java b/classpath/java/lang/RuntimePermission.java
new file mode 100644
index 0000000000..a737444a6f
--- /dev/null
+++ b/classpath/java/lang/RuntimePermission.java
@@ -0,0 +1,21 @@
+/* Copyright (c) 2012, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
+package java.lang;
+
+import java.security.BasicPermission;
+
+public class RuntimePermission extends BasicPermission {
+
+  public RuntimePermission(String name) {
+    super(name);
+  }
+
+}
diff --git a/classpath/java/lang/System.java b/classpath/java/lang/System.java
index 9506fb3457..827f357e8b 100644
--- a/classpath/java/lang/System.java
+++ b/classpath/java/lang/System.java
@@ -17,12 +17,15 @@ import java.io.BufferedOutputStream;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.FileDescriptor;
+import java.util.Map;
+import java.util.Hashtable;
 import java.util.Properties;
 
 public abstract class System {
   private static final long NanoTimeBaseInMillis = currentTimeMillis();
   
   private static Property properties;
+  private static Map<String, String> environment;
   
   private static SecurityManager securityManager;
   //   static {
@@ -145,4 +148,37 @@ public abstract class System {
       this.next = next;
     }
   }
+
+  public static String getenv(String name) throws NullPointerException,
+    SecurityException {
+    if (getSecurityManager() != null) { // is this allowed?
+      getSecurityManager().
+        checkPermission(new RuntimePermission("getenv." + name));
+    }
+    return getenv().get(name);
+  }
+
+  public static Map<String, String> getenv() throws SecurityException {
+    if (getSecurityManager() != null) { // is this allowed?
+      getSecurityManager().checkPermission(new RuntimePermission("getenv.*"));
+    }
+
+    if (environment == null) { // build environment table
+      String[] vars = getEnvironment();
+      environment = new Hashtable<String, String>(vars.length);
+      for (String var : vars) { // parse name-value pairs
+        int equalsIndex = var.indexOf('=');
+        // null names and values are forbidden
+        if (equalsIndex != -1 && equalsIndex < var.length() - 1) {
+          environment.put(var.substring(0, equalsIndex),
+                          var.substring(equalsIndex + 1));
+        }
+      }
+    }
+
+    return environment;
+  }
+
+  /** Returns the native process environment. */
+  private static native String[] getEnvironment();
 }