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/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 1997-2011 Oracle and/or its affiliates. All rights reserved. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common Development * and Distribution License("CDDL") (collectively, the "License"). You * may not use this file except in compliance with the License. You can * obtain a copy of the License at * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html * or packager/legal/LICENSE.txt. See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each * file and include the License file at packager/legal/LICENSE.txt. * * GPL Classpath Exception: * Oracle designates this particular file as subject to the "Classpath" * exception as provided by Oracle in the GPL Version 2 section of the License * file that accompanied this code. * * Modifications: * If applicable, add the following below the License Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * "Portions Copyright [year] [name of copyright owner]" * * Contributor(s): * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding "[Contributor] * elects to include this software in this distribution under the [CDDL or GPL * Version 2] license." If you don't indicate a single choice of license, a * recipient has the option to distribute your version of this file under * either the CDDL, the GPL Version 2 or to extend the choice of license to * its licensees as provided above. However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. * * * This file incorporates work covered by the following copyright and * permission notice: * * Copyright 2004 The Apache Software Foundation * * 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.apache.catalina.startup; import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; import java.util.Enumeration; import java.util.Hashtable; /** * Concrete implementation of the UserDatabase
interface * that processes the/etc/passwd
file on a Unix system. * * @author Craig R. McClanahan * @version $Revision: 1.2 $ $Date: 2005/12/08 01:28:09 $ */ public final class PasswdUserDatabase implements UserDatabase { // --------------------------------------------------------- Constructors /** * Initialize a new instance of this user database component. */ public PasswdUserDatabase() { super(); } // --------------------------------------------------- Instance Variables /** * The pathname of the Unix password file. */ private static final String PASSWORD_FILE = "/etc/passwd"; /** * The set of home directories for all defined users, keyed by username. */ private Hashtablehomes = new Hashtable (); /** * The UserConfig listener with which we are associated. */ private UserConfig userConfig = null; // ----------------------------------------------------------- Properties /** * Return the UserConfig listener with which we are associated. */ public UserConfig getUserConfig() { return (this.userConfig); } /** * Set the UserConfig listener with which we are associated. * * @param userConfig The new UserConfig listener */ public void setUserConfig(UserConfig userConfig) { this.userConfig = userConfig; init(); } // ------------------------------------------------------- Public Methods /** * Return an absolute pathname to the home directory for the specified user. * * @param user User for which a home directory should be retrieved */ public String getHome(String user) { return homes.get(user); } /** * Return an enumeration of the usernames defined on this server. */ public Enumeration getUsers() { return (homes.keys()); } // ------------------------------------------------------ Private Methods /** * Initialize our set of users and home directories. */ private void init() { BufferedReader reader = null; try { reader = new BufferedReader(new FileReader(PASSWORD_FILE)); while (true) { // Accumulate the next line StringBuilder buffer = new StringBuilder(); while (true) { int ch = reader.read(); if ((ch < 0) || (ch == '\n')) break; buffer.append((char) ch); } String line = buffer.toString(); if (line.length() < 1) break; // Parse the line into constituent elements int n = 0; String tokens[] = new String[7]; for (int i = 0; i < tokens.length; i++) tokens[i] = null; while (n < tokens.length) { String token = null; int colon = line.indexOf(':'); if (colon >= 0) { token = line.substring(0, colon); line = line.substring(colon + 1); } else { token = line; line = ""; } tokens[n++] = token; } // Add this user and corresponding directory if ((tokens[0] != null) && (tokens[5] != null)) homes.put(tokens[0], tokens[5]); } reader.close(); reader = null; } catch (Exception e) { if (reader != null) { try { reader.close(); } catch (IOException f) { ; } reader = null; } } } }