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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 @jdk.Exported
34 public class UnixSystem {
35 
getUnixInfo()36     private native void getUnixInfo();
37 
38     protected String username;
39     protected long uid;
40     protected long gid;
41     protected long[] groups;
42 
43     /**
44      * Instantiate a <code>UnixSystem</code> and load
45      * the native library to access the underlying system information.
46      */
UnixSystem()47     public UnixSystem() {
48         System.loadLibrary("jaas_unix");
49         getUnixInfo();
50     }
51 
52     /**
53      * Get the username for the current Unix user.
54      *
55      * <p>
56      *
57      * @return the username for the current Unix user.
58      */
getUsername()59     public String getUsername() {
60         return username;
61     }
62 
63     /**
64      * Get the UID for the current Unix user.
65      *
66      * <p>
67      *
68      * @return the UID for the current Unix user.
69      */
getUid()70     public long getUid() {
71         return uid;
72     }
73 
74     /**
75      * Get the GID for the current Unix user.
76      *
77      * <p>
78      *
79      * @return the GID for the current Unix user.
80      */
getGid()81     public long getGid() {
82         return gid;
83     }
84 
85     /**
86      * Get the supplementary groups for the current Unix user.
87      *
88      * <p>
89      *
90      * @return the supplementary groups for the current Unix user.
91      */
getGroups()92     public long[] getGroups() {
93         return groups == null ? null : groups.clone();
94     }
95 }
96