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      1 /*
      2  * Copyright (c) 2008, 2013, 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 /**
     29  * Represents an entry in the mount table.
     30  */
     31 
     32 class UnixMountEntry {
     33     private byte[] name;        // file system name
     34     private byte[] dir;         // directory (mount point)
     35     private byte[] fstype;      // ufs, nfs, ...
     36     private byte[] opts;        // mount options
     37     private long dev;           // device ID
     38 
     39     private volatile String fstypeAsString;
     40     private volatile String optionsAsString;
     41 
     42     UnixMountEntry() {
     43     }
     44 
     45     String name() {
     46         return Util.toString(name);
     47     }
     48 
     49     String fstype() {
     50         if (fstypeAsString == null)
     51             fstypeAsString = Util.toString(fstype);
     52         return fstypeAsString;
     53     }
     54 
     55     byte[] dir() {
     56         return dir;
     57     }
     58 
     59     long dev() {
     60         return dev;
     61     }
     62 
     63     /**
     64      * Tells whether the mount entry has the given option.
     65      */
     66     boolean hasOption(String requested) {
     67         if (optionsAsString == null)
     68             optionsAsString = Util.toString(opts);
     69         for (String opt: Util.split(optionsAsString, ',')) {
     70             if (opt.equals(requested))
     71                 return true;
     72         }
     73         return false;
     74     }
     75 
     76     // generic option
     77     boolean isIgnored() {
     78         return hasOption("ignore");
     79     }
     80 
     81     // generic option
     82     boolean isReadOnly() {
     83         return hasOption("ro");
     84     }
     85 }
     86