Edit C:\Program Files\Java\jdk1.7.0_45\com\sun\security\auth\module\UnixSystem.java

/*
 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package com.sun.security.auth.module;

/**
 * This class implementation retrieves and makes available Unix
 * UID/GID/groups information for the current user.
 *
 */
public class UnixSystem {

private native void getUnixInfo();

protected String username;
    protected long uid;
    protected long gid;
    protected long[] groups;

/**
 * Instantiate a <code>UnixSystem</code> and load
 * the native library to access the underlying system information.
 */
 public UnixSystem() {
 System.loadLibrary("jaas_unix");
 getUnixInfo();
 }

/**
 * Get the username for the current Unix user.
 *
 * 
 *
 * @return the username for the current Unix user.
 */
 public String getUsername() {
 return username;
 }

/**
 * Get the UID for the current Unix user.
 *
 * 
 *
 * @return the UID for the current Unix user.
 */
 public long getUid() {
 return uid;
 }

/**
 * Get the GID for the current Unix user.
 *
 * 
 *
 * @return the GID for the current Unix user.
 */
 public long getGid() {
 return gid;
 }

/**
 * Get the supplementary groups for the current Unix user.
 *
 * 
 *
 * @return the supplementary groups for the current Unix user.
 */
 public long[] getGroups() {
 return groups == null ? null : groups.clone();
 }
}

Ms-Dos/Windows Unix Write backup

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