/*

 * Copyright 2008-2009 Sun Microsystems, Inc.  All Rights Reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package sun.nio.fs;

import java.io.IOException;

import static sun.nio.fs.UnixNativeDispatcher.*;

import static sun.nio.fs.SolarisConstants.*;

/**

 * Solaris implementation of FileStore

 */

class SolarisFileStore

    extends UnixFileStore

{

    private final boolean xattrEnabled;

    SolarisFileStore(UnixPath file) throws IOException {

        super(file);

        this.xattrEnabled = xattrEnabled();

    }

    SolarisFileStore(UnixFileSystem fs, UnixMountEntry entry) throws IOException {

        super(fs, entry);

        this.xattrEnabled = xattrEnabled();

    }

    // returns true if extended attributes enabled

    private boolean xattrEnabled() {

        long res = 0L;

        try {

            res = pathconf(file(), _PC_XATTR_ENABLED);

        } catch (UnixException x) {

            // ignore

        }

        return (res != 0L);

    }

    @Override

    UnixMountEntry findMountEntry() throws IOException {

        // On Solaris iterate over the entries in the mount table to find device

        for (UnixMountEntry entry: file().getFileSystem().getMountEntries()) {

            if (entry.dev() == dev()) {

                return entry;

            }

        }

        throw new IOException("Device not found in mnttab");

    }

    @Override

    public boolean supportsFileAttributeView(String name) {

        if (name.equals("acl")) {

            // lookup fstypes.properties

            FeatureStatus status = checkIfFeaturePresent("nfsv4acl");

            if (status == FeatureStatus.PRESENT)

                return true;

            if (status == FeatureStatus.NOT_PRESENT)

                return false;

            // AclFileAttributeView available on ZFS

            return (type().equals("zfs"));

        }

        if (name.equals("xattr")) {

            // lookup fstypes.properties

            FeatureStatus status = checkIfFeaturePresent("xattr");

            if (status == FeatureStatus.PRESENT)

                return true;

            if (status == FeatureStatus.NOT_PRESENT)

                return false;

            return xattrEnabled;

        }

        return super.supportsFileAttributeView(name);

    }

    @Override

    boolean isLoopback() {

        return type().equals("lofs");

    }

}