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
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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.
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24  */
25 
26 package sun.nio.fs;
27 
28 import java.nio.file.*;
29 import java.nio.file.attribute.*;
30 import java.nio.file.spi.FileTypeDetector;
31 import java.io.IOException;
32 
33 /**
34  * Linux implementation of FileSystemProvider
35  */
36 
37 public class LinuxFileSystemProvider extends UnixFileSystemProvider {
LinuxFileSystemProvider()38     public LinuxFileSystemProvider() {
39         super();
40     }
41 
42     @Override
newFileSystem(String dir)43     LinuxFileSystem newFileSystem(String dir) {
44         return new LinuxFileSystem(this, dir);
45     }
46 
47     @Override
getFileStore(UnixPath path)48     LinuxFileStore getFileStore(UnixPath path) throws IOException {
49         // Android-changed: Complete information about file systems is neither available to regular
50         // apps nor the system server due to SELinux policies.
51         // return new LinuxFileStore(path);
52 
53         throw new SecurityException("getFileStore");
54     }
55 
56     @Override
57     @SuppressWarnings("unchecked")
getFileAttributeView(Path obj, Class<V> type, LinkOption... options)58     public <V extends FileAttributeView> V getFileAttributeView(Path obj,
59                                                                 Class<V> type,
60                                                                 LinkOption... options)
61     {
62         // Android-changed: Delegate to UnixFileSystemProvider, remove support for "dos" and
63         // "user" file attribute views which are not supported.
64         /*
65         if (type == DosFileAttributeView.class) {
66             return (V) new LinuxDosFileAttributeView(UnixPath.toUnixPath(obj),
67                                                      Util.followLinks(options));
68         }
69         if (type == UserDefinedFileAttributeView.class) {
70             return (V) new LinuxUserDefinedFileAttributeView(UnixPath.toUnixPath(obj),
71                                                              Util.followLinks(options));
72         }
73         */
74         return super.getFileAttributeView(obj, type, options);
75     }
76 
77     @Override
getFileAttributeView(Path obj, String name, LinkOption... options)78     public DynamicFileAttributeView getFileAttributeView(Path obj,
79                                                          String name,
80                                                          LinkOption... options)
81     {
82         // Android-changed: Delegate to UnixFileSystemProvider, remove support for "dos" and
83         // "user" file attribute views which are not supported.
84         /*
85         if (name.equals("dos")) {
86             return new LinuxDosFileAttributeView(UnixPath.toUnixPath(obj),
87                                                  Util.followLinks(options));
88         }
89         if (name.equals("user")) {
90             return new LinuxUserDefinedFileAttributeView(UnixPath.toUnixPath(obj),
91                                                          Util.followLinks(options));
92         }
93         */
94         return super.getFileAttributeView(obj, name, options);
95     }
96 
97     @Override
98     @SuppressWarnings("unchecked")
readAttributes(Path file, Class<A> type, LinkOption... options)99     public <A extends BasicFileAttributes> A readAttributes(Path file,
100                                                             Class<A> type,
101                                                             LinkOption... options)
102         throws IOException
103     {
104         // Android-changed: Delegate to UnixFileSystemProvider, remove support for "dos" and
105         // "user" file attribute views which are not supported.
106         /*
107         if (type == DosFileAttributes.class) {
108             DosFileAttributeView view =
109                 getFileAttributeView(file, DosFileAttributeView.class, options);
110             return (A) view.readAttributes();
111         } else {
112             return super.readAttributes(file, type, options);
113         }
114         */
115         return super.readAttributes(file, type, options);
116     }
117 
118     @Override
getFileTypeDetector()119     FileTypeDetector getFileTypeDetector() {
120         // Android-changed: As libgio & libmagic is not available, GnomeFileTypeDetector and
121         // MagicFileTypeDetector have been removed. MimeTypeFileDetector detects file type based
122         // on the file extension, which may give false results.
123         /*
124         Path userMimeTypes = Paths.get(AccessController.doPrivileged(
125             new GetPropertyAction("user.home")), ".mime.types");
126         Path etcMimeTypes = Paths.get("/etc/mime.types");
127 
128         return chain(new GnomeFileTypeDetector(),
129                      new MimeTypesFileTypeDetector(userMimeTypes),
130                      new MimeTypesFileTypeDetector(etcMimeTypes),
131                      new MagicFileTypeDetector());
132         */
133         return new MimeTypesFileTypeDetector();
134     }
135 }
136