1 /* 2 * Copyright (c) 2000, 2010, 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 com.sun.security.auth.module; 27 28 /** 29 * <p> This class implementation retrieves and makes available Unix 30 * UID/GID/groups information for the current user. 31 * 32 */ 33 public class UnixSystem { 34 35 private native void getUnixInfo(); 36 37 protected String username; 38 protected long uid; 39 protected long gid; 40 protected long[] groups; 41 42 /** 43 * Instantiate a <code>UnixSystem</code> and load 44 * the native library to access the underlying system information. 45 */ 46 public UnixSystem() { 47 System.loadLibrary("jaas_unix"); 48 getUnixInfo(); 49 } 50 51 /** 52 * Get the username for the current Unix user. 53 * 54 * <p> 55 * 56 * @return the username for the current Unix user. 57 */ 58 public String getUsername() { 59 return username; 60 } 61 62 /** 63 * Get the UID for the current Unix user. 64 * 65 * <p> 66 * 67 * @return the UID for the current Unix user. 68 */ 69 public long getUid() { 70 return uid; 71 } 72 73 /** 74 * Get the GID for the current Unix user. 75 * 76 * <p> 77 * 78 * @return the GID for the current Unix user. 79 */ 80 public long getGid() { 81 return gid; 82 } 83 84 /** 85 * Get the supplementary groups for the current Unix user. 86 * 87 * <p> 88 * 89 * @return the supplementary groups for the current Unix user. 90 */ 91 public long[] getGroups() { 92 return groups == null ? null : groups.clone(); 93 } 94 }