1999-04-07 16:42:40 +02:00
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// System.java - System-specific info.
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2000-01-19 19:39:27 +01:00
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/* Copyright (C) 1998, 1999 Red Hat, Inc.
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1999-04-07 16:42:40 +02:00
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package java.lang;
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import java.io.FileDescriptor;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.FilterInputStream;
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import java.io.InputStream;
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import java.io.PrintStream;
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import java.io.BufferedInputStream;
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import java.io.BufferedOutputStream;
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import java.util.Properties;
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/**
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* @author Tom Tromey <tromey@cygnus.com>
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* @date August 27, 1998
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*/
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/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
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* "The Java Language Specification", ISBN 0-201-63451-1
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* plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
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* Status: 1.1. Some 1.2 methods missing. Properties code not fully
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* implemented.
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*/
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public final class System
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{
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public static native void arraycopy (Object src, int srcOffset,
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Object dst, int dstOffset,
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int count);
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public static native long currentTimeMillis ();
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public static void exit (int status)
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{
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Runtime.getRuntime().exit(status);
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}
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public static void gc ()
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{
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Runtime.getRuntime().gc();
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}
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// Marked deprecated in 1.1. We implement what the JCL book says.
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public static String getenv (String name)
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{
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throw new Error ();
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}
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private static native void init_properties ();
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public static Properties getProperties ()
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{
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if (secman != null)
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secman.checkPropertiesAccess();
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init_properties ();
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return properties;
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}
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public static String getProperty (String property)
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{
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if (secman != null)
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secman.checkPropertyAccess(property);
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init_properties ();
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return properties.getProperty(property);
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}
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public static String getProperty (String property, String defval)
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{
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if (secman != null)
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secman.checkPropertyAccess(property, defval);
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init_properties ();
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return properties.getProperty(property, defval);
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}
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public static SecurityManager getSecurityManager ()
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{
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return secman;
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}
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public static native int identityHashCode (Object obj);
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public static void load (String pathname)
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{
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Runtime.getRuntime().load(pathname);
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}
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public static void loadLibrary (String libname)
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{
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Runtime.getRuntime().loadLibrary(libname);
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}
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public static void runFinalization ()
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{
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Runtime.getRuntime().runFinalization();
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}
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// Marked as deprecated in 1.2.
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public static void runFinalizersOnExit (boolean run)
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{
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Runtime.getRuntime().runFinalizersOnExit(run);
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}
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private static void checkSetIO ()
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{
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// In 1.1, we are supposed to call checkExec, but the argument is
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// not specified. In 1.2, we are supposed to use checkPermission,
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// which doesn't exist in 1.1.
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if (secman != null)
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secman.checkExec("");
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}
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public static native void setErr (PrintStream newErr);
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public static native void setIn (InputStream newIn);
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public static native void setOut (PrintStream newOut);
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public static void setProperties (Properties props)
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{
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if (secman != null)
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secman.checkPropertiesAccess();
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// We might not have initialized yet.
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prop_init = true;
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properties = props;
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}
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// TODO 1.2.
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// public static String setProperty (String key, String value);
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// TODO 1.2.
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// public static String mapLibraryName (String libname);
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public static void setSecurityManager (SecurityManager s)
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{
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if (secman != null)
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throw new SecurityException ();
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secman = s;
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}
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// Public data.
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public static final InputStream in = new BufferedInputStream (new FileInputStream (FileDescriptor.in));
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public static final PrintStream out = new PrintStream (new BufferedOutputStream (new FileOutputStream (FileDescriptor.out)), true);
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public static final PrintStream err = new PrintStream (new BufferedOutputStream (new FileOutputStream (FileDescriptor.err)), true);
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// Don't allow System objects to be made.
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private System ()
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{
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}
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// Private data.
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private static SecurityManager secman = null;
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private static Properties properties = null;
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// This boolean is only required for 1.1 and earlier. After 1.1, a
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// null properties should always be re-initialized.
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private static boolean prop_init = false;
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}
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