1 /*
   2  * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.security.action;
  27 
  28 import jdk.internal.loader.BootLoader;
  29 
  30 import java.io.*;
  31 
  32 import java.security.AccessController;
  33 import java.security.PrivilegedAction;
  34 
  35 /**
  36  * A convenience class for loading a native library as a privileged action.
  37  */
  38 public class LoadLibraryAction implements PrivilegedAction<Void> {
  39     private final String name;
  40     LoadLibraryAction(String name) {
  41         this.name = name;
  42     }
  43 
  44     @Override
  45     public Void run() {
  46         BootLoader.getNativeLibraries().loadLibrary(name);
  47         return null;
  48     }
  49 
  50     /**
  51      * Convenience method to load a native library without going through doPrivileged
  52      * if no security manager is present. This is unsafe for inclusion in a
  53      * public API but allowable here since this class is now encapsulated.
  54      *
  55      * Note: This should only be used by modules defined to the boot loader.
  56      *
  57      * @param name the library name
  58      */
  59     public static void privilegedLoadLibrary(String name) {
  60         assert name.indexOf(File.separatorChar) < 0;
  61         if (System.getSecurityManager() == null) {
  62             BootLoader.getNativeLibraries().loadLibrary(name);
  63         } else {
  64             AccessController.doPrivileged(new LoadLibraryAction(name));
  65         }
  66     }
  67 }