1 // ========================================================================
2 // Copyright 2002-2005 Mort Bay Consulting Pty. Ltd.
3 // ------------------------------------------------------------------------
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 // http://www.apache.org/licenses/LICENSE-2.0
8 // Unless required by applicable law or agreed to in writing, software
9 // distributed under the License is distributed on an "AS IS" BASIS,
10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 // See the License for the specific language governing permissions and
12 // limitations under the License.
13 // ========================================================================
14
15 package org.mortbay.setuid;
16
17 import java.io.File;
18
19
20 /**
21 * Class is for changing user and groupId, it can also be use to retrieve user information by using getpwuid(uid) or getpwnam(username) of both linux and unix systems
22 * @author Greg Wilkins
23 * @author Leopoldo Lee Agdeppa III
24 */
25
26 public class SetUID
27 {
28 public static final int OK = 0;
29 public static final int ERROR = -1;
30
31 public static native int setumask(int mask);
32 public static native int setuid(int uid);
33 public static native int setgid(int gid);
34
35 public static native Passwd getpwnam(String name) throws SecurityException;
36 public static native Passwd getpwuid(int uid) throws SecurityException;
37
38 public static native Group getgrnam(String name) throws SecurityException;
39 public static native Group getgrgid(int gid) throws SecurityException;
40
41 private static void loadLibrary()
42 {
43 // load libjettysetuid.so ${jetty.libsetuid.path}
44 try
45 {
46 if(System.getProperty("jetty.libsetuid.path") != null)
47 {
48 File lib = new File(System.getProperty("jetty.libsetuid.path"));
49 if(lib.exists())
50 {
51 System.load(lib.getCanonicalPath());
52 }
53 return;
54 }
55
56 }
57 catch (Throwable e)
58 {
59 //Ignorable if there is another way to find the lib
60 }
61
62 try
63 {
64 System.loadLibrary("libsetuid");
65 return;
66 }
67 catch (Throwable e)
68 {
69 //Ignorable if ther eis another way to find the lib
70 }
71
72 // try to load from usual path @ jetty.home/lib/ext
73 try
74 {
75 if(System.getProperty("jetty.home") != null)
76 {
77 File lib = new File(System.getProperty("jetty.home") + "/lib/ext/libsetuid.so");
78 if(lib.exists())
79 {
80 System.load(lib.getCanonicalPath());
81 }
82 return;
83 }
84
85 }
86 catch (Throwable e)
87 {
88
89 }
90
91 // try to load from jetty.lib where rpm puts this file
92 try
93 {
94 if(System.getProperty("jetty.lib") != null)
95 {
96 File lib = new File(System.getProperty("jetty.lib") + "/libsetuid.so");
97 if(lib.exists())
98 {
99 System.load(lib.getCanonicalPath());
100 }
101 return;
102 }
103
104 }
105 catch (Throwable e)
106 {
107 }
108
109 System.err.println("Error: libsetuid.so could not be found");
110 }
111
112
113 static
114 {
115 loadLibrary();
116 }
117
118 }