1 /*
   2  * Copyright (c) 2008, 2019, 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 
  58     static int getmntent(long fp, UnixMountEntry entry, int buflen) throws UnixException {
  59         NativeBuffer buffer = NativeBuffers.getNativeBuffer(buflen);
  60         try {
  61             return getmntent0(fp, entry, buffer.address(), buflen);
  62         } finally {
  63             buffer.release();
  64         }
  65     }
  66 
  67     static native int getmntent0(long fp, UnixMountEntry entry, long buffer, int bufLen)
  68         throws UnixException;
  69 
  70     /**
  71      * int endmntent(FILE* filep);
  72      */
  73     static native void endmntent(long stream) throws UnixException;
  74 
  75     /**
  76      * ssize_t getline(char **lineptr, size_t *n, FILE *stream);
  77      */
  78     static native int getlinelen(long stream) throws UnixException;
  79 
  80     /**
  81      * ssize_t fgetxattr(int filedes, const char *name, void *value, size_t size);
  82      */
  83     static int fgetxattr(int filedes, byte[] name, long valueAddress,
  84                          int valueLen) throws UnixException
  85     {
  86         NativeBuffer buffer = NativeBuffers.asNativeBuffer(name);
  87         try {
  88             return fgetxattr0(filedes, buffer.address(), valueAddress, valueLen);
  89         } finally {
  90             buffer.release();
  91         }
  92     }
  93 
  94     private static native int fgetxattr0(int filedes, long nameAddress,
  95         long valueAdddress, int valueLen) throws UnixException;
  96 
  97     /**
  98      *  fsetxattr(int filedes, const char *name, const void *value, size_t size, int flags);
  99      */
 100     static void fsetxattr(int filedes, byte[] name, long valueAddress,
 101         int valueLen) throws UnixException
 102     {
 103         NativeBuffer buffer = NativeBuffers.asNativeBuffer(name);
 104         try {
 105             fsetxattr0(filedes, buffer.address(), valueAddress, valueLen);
 106         } finally {
 107             buffer.release();
 108         }
 109     }
 110 
 111     private static native void fsetxattr0(int filedes, long nameAddress,
 112         long valueAdddress, int valueLen) throws UnixException;
 113 
 114     /**
 115      * fremovexattr(int filedes, const char *name);
 116      */
 117     static void fremovexattr(int filedes, byte[] name) throws UnixException {
 118         NativeBuffer buffer = NativeBuffers.asNativeBuffer(name);
 119         try {
 120             fremovexattr0(filedes, buffer.address());
 121         } finally {
 122             buffer.release();
 123         }
 124     }
 125 
 126     private static native void fremovexattr0(int filedes, long nameAddress)
 127         throws UnixException;
 128 
 129     /**
 130      * size_t flistxattr(int filedes, const char *list, size_t size)
 131      */
 132     static native int flistxattr(int filedes, long listAddress, int size)
 133         throws UnixException;
 134 
 135     // initialize
 136     private static native void init();
 137 
 138     static {
 139         AccessController.doPrivileged(new PrivilegedAction<Void>() {
 140             public Void run() {
 141                 System.loadLibrary("nio");
 142                 return null;
 143         }});
 144         init();
 145     }
 146 }