jdk/src/share/classes/com/sun/security/auth/module/UnixSystem.java
author weijun
Mon, 06 Dec 2010 10:48:57 +0800
changeset 7528 aae1ca8d088f
parent 5506 202f599c92aa
child 20742 4ae78e8060d6
permissions -rw-r--r--
6992964: FindBugs warnings in com.sun.security.auth.module.UnixSystem.java Reviewed-by: mullan
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/*
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 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package com.sun.security.auth.module;
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/**
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 * <p> This class implementation retrieves and makes available Unix
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 * UID/GID/groups information for the current user.
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 *
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 */
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public class UnixSystem {
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    private native void getUnixInfo();
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    protected String username;
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    protected long uid;
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    protected long gid;
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    protected long[] groups;
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    /**
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     * Instantiate a <code>UnixSystem</code> and load
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     * the native library to access the underlying system information.
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     */
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    public UnixSystem() {
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        System.loadLibrary("jaas_unix");
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        getUnixInfo();
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    }
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    /**
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     * Get the username for the current Unix user.
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     *
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     * <p>
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     *
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     * @return the username for the current Unix user.
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     */
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    public String getUsername() {
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        return username;
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    }
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    /**
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     * Get the UID for the current Unix user.
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     *
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     * <p>
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     *
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     * @return the UID for the current Unix user.
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     */
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    public long getUid() {
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        return uid;
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    }
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    /**
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     * Get the GID for the current Unix user.
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     *
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     * <p>
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     *
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     * @return the GID for the current Unix user.
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     */
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    public long getGid() {
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        return gid;
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    }
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    /**
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     * Get the supplementary groups for the current Unix user.
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     *
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     * <p>
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     *
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     * @return the supplementary groups for the current Unix user.
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     */
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    public long[] getGroups() {
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        return groups == null ? null : groups.clone();
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    }
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}