1/* 2 * Copyright (c) 2000, 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 26package com.sun.security.auth.module; 27 28/** 29 * This class implementation retrieves and makes available Unix 30 * UID/GID/groups information for the current user. 31 */ 32public class UnixSystem { 33 34 private native void getUnixInfo(); 35 36 protected String username; 37 protected long uid; 38 protected long gid; 39 protected long[] groups; 40 41 /** 42 * Instantiate a {@code UnixSystem} and load 43 * the native library to access the underlying system information. 44 */ 45 public UnixSystem() { 46 System.loadLibrary("jaas_unix"); 47 getUnixInfo(); 48 } 49 50 /** 51 * Get the username for the current Unix user. 52 * 53 * @return the username for the current Unix user. 54 */ 55 public String getUsername() { 56 return username; 57 } 58 59 /** 60 * Get the UID for the current Unix user. 61 * 62 * @return the UID for the current Unix user. 63 */ 64 public long getUid() { 65 return uid; 66 } 67 68 /** 69 * Get the GID for the current Unix user. 70 * 71 * @return the GID for the current Unix user. 72 */ 73 public long getGid() { 74 return gid; 75 } 76 77 /** 78 * Get the supplementary groups for the current Unix user. 79 * 80 * @return the supplementary groups for the current Unix user. 81 */ 82 public long[] getGroups() { 83 return groups == null ? null : groups.clone(); 84 } 85} 86