alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Jetty example source code file (SetUID.java)

This example Jetty source code file (SetUID.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Jetty tags/keywords

error, file, file, group, io, ok, passwd, passwd, securityexception, securityexception, setuid, throwable, throwable

The Jetty SetUID.java source code

// ========================================================================
// Copyright 2002-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at 
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========================================================================

package org.mortbay.setuid;

import java.io.File;


/**
 * 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
 * @author Greg Wilkins
 * @author Leopoldo Lee Agdeppa III
 */

public class SetUID
{
    public static final int OK = 0;
    public static final int ERROR = -1;

    public static native int setumask(int mask);
    public static native int setuid(int uid);
    public static native int setgid(int gid);
    
    public static native Passwd getpwnam(String name) throws SecurityException;
    public static native Passwd getpwuid(int uid) throws SecurityException;
    
    public static native Group getgrnam(String name) throws SecurityException;
    public static native Group getgrgid(int gid) throws SecurityException;    
    
    private static void loadLibrary()
    {
        // load libjettysetuid.so ${jetty.libsetuid.path} 
        try 
        {
            if(System.getProperty("jetty.libsetuid.path") != null)
            {
                File lib = new File(System.getProperty("jetty.libsetuid.path"));
                if(lib.exists())
                {
                    System.load(lib.getCanonicalPath());
                }
                return;
            }
            
        } 
        catch (Throwable e) 
        {
           //Ignorable if there is another way to find the lib 
        }
        
        try 
        {
            System.loadLibrary("libsetuid");
            return;
        } 
        catch (Throwable e) 
        {
           //Ignorable if ther eis another way to find the lib
        }
        
        // try to load from usual path @ jetty.home/lib/ext
        try 
        {
            if(System.getProperty("jetty.home") != null)
            {
                File lib = new File(System.getProperty("jetty.home") + "/lib/ext/libsetuid.so");
                if(lib.exists())
                {
                    System.load(lib.getCanonicalPath());
                }
                return;
            }
            
        } 
        catch (Throwable e) 
        {
            
        }
        
        // try to load from jetty.lib where rpm puts this file
        try 
        {
            if(System.getProperty("jetty.lib") != null)
            {
                File lib = new File(System.getProperty("jetty.lib") + "/libsetuid.so");
                if(lib.exists())
                {
                    System.load(lib.getCanonicalPath());
                }
                return;
            }
            
        } 
        catch (Throwable e) 
        {
        }

        System.err.println("Error: libsetuid.so could not be found");
    }
    
    
    static 
    {
    	loadLibrary();
    }
    
}

Other Jetty examples (source code examples)

Here is a short list of links related to this Jetty SetUID.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.