| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 <code>UserDatabase</code> interface |
| * that processes the <code>/etc/passwd</code> file on a Unix system. |
| * |
| * @author Craig R. McClanahan |
| */ |
| 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 final Hashtable<String,String> homes = new Hashtable<>(); |
| |
| |
| /** |
| * The UserConfig listener with which we are associated. |
| */ |
| private UserConfig userConfig = null; |
| |
| |
| // ----------------------------------------------------------- Properties |
| |
| |
| /** |
| * Return the UserConfig listener with which we are associated. |
| */ |
| @Override |
| public UserConfig getUserConfig() { |
| |
| return (this.userConfig); |
| |
| } |
| |
| |
| /** |
| * Set the UserConfig listener with which we are associated. |
| * |
| * @param userConfig The new UserConfig listener |
| */ |
| @Override |
| 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 |
| */ |
| @Override |
| public String getHome(String user) { |
| |
| return homes.get(user); |
| |
| } |
| |
| |
| /** |
| * Return an enumeration of the usernames defined on this server. |
| */ |
| @Override |
| public Enumeration<String> 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) { |
| // Ignore |
| } |
| reader = null; |
| } |
| } |
| |
| } |
| |
| |
| } |