1 /*
   2  * Copyright (c) 2008, 2012, 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.nio.fs;
  27 
  28 import java.security.AccessController;
  29 import java.security.PrivilegedAction;
  30 
  31 /**
  32  * Linux specific system calls.
  33  */
  34 
  35 class LinuxNativeDispatcher extends UnixNativeDispatcher {
  36     private LinuxNativeDispatcher() { }
  37 
  38    /**
  39     * FILE *setmntent(const char *filename, const char *type);
  40     */
  41     static long setmntent(byte[] filename, byte[] type) throws UnixException {
  42         NativeBuffer pathBuffer = NativeBuffers.asNativeBuffer(filename);
  43         NativeBuffer typeBuffer = NativeBuffers.asNativeBuffer(type);
  44         try {
  45             return setmntent0(pathBuffer.address(), typeBuffer.address());
  46         } finally {
  47             typeBuffer.release();
  48             pathBuffer.release();
  49         }
  50     }
  51     private static native long setmntent0(long pathAddress, long typeAddress)
  52         throws UnixException;
  53 
  54     /**
  55      * int getmntent(FILE *fp, struct mnttab *mp, int len);
  56      */
  57     static native int getmntent(long fp, UnixMountEntry entry)
  58         throws UnixException;
  59 
  60     /**
  61      * int endmntent(FILE* filep);
  62      */
  63     static native void endmntent(long stream) throws UnixException;
  64 
  65     /**
  66      * ssize_t fgetxattr(int filedes, const char *name, void *value, size_t size);
  67      */
  68     static int fgetxattr(int filedes, byte[] name, long valueAddress,
  69                          int valueLen) throws UnixException
  70     {
  71         NativeBuffer buffer = NativeBuffers.asNativeBuffer(name);
  72         try {
  73             return fgetxattr0(filedes, buffer.address(), valueAddress, valueLen);
  74         } finally {
  75             buffer.release();
  76         }
  77     }
  78 
  79     private static native int fgetxattr0(int filedes, long nameAddress,
  80         long valueAddress, int valueLen) throws UnixException;
  81 
  82     /**
  83      *  fsetxattr(int filedes, const char *name, const void *value, size_t size, int flags);
  84      */
  85     static void fsetxattr(int filedes, byte[] name, long valueAddress,
  86         int valueLen) throws UnixException
  87     {
  88         NativeBuffer buffer = NativeBuffers.asNativeBuffer(name);
  89         try {
  90             fsetxattr0(filedes, buffer.address(), valueAddress, valueLen);
  91         } finally {
  92             buffer.release();
  93         }
  94     }
  95 
  96     private static native void fsetxattr0(int filedes, long nameAddress,
  97         long valueAddress, int valueLen) throws UnixException;
  98 
  99     /**
 100      * fremovexattr(int filedes, const char *name);
 101      */
 102     static void fremovexattr(int filedes, byte[] name) throws UnixException {
 103         NativeBuffer buffer = NativeBuffers.asNativeBuffer(name);
 104         try {
 105             fremovexattr0(filedes, buffer.address());
 106         } finally {
 107             buffer.release();
 108         }
 109     }
 110 
 111     private static native void fremovexattr0(int filedes, long nameAddress)
 112         throws UnixException;
 113 
 114     /**
 115      * size_t flistxattr(int filedes, const char *list, size_t size)
 116      */
 117     static native int flistxattr(int filedes, long listAddress, int size)
 118         throws UnixException;
 119 
 120     // initialize
 121     private static native void init();
 122 
 123     static {
 124         AccessController.doPrivileged(new PrivilegedAction<Void>() {
 125             public Void run() {
 126                 System.loadLibrary("nio");
 127                 return null;
 128         }});
 129         init();
 130     }
 131 }