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<>() {

   125             public Void run() {

   126                 System.loadLibrary("nio");

   127                 return null;

   128         }});

   129         init();

   130     }

   131 }