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/*
* 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.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.naming.StringManager;
/**
* Concrete implementation of the <code>UserDatabase</code> interface that processes the <code>/etc/passwd</code> file
* on a Unix system.
*/
public final class PasswdUserDatabase implements UserDatabase {
private static final Log log = LogFactory.getLog(PasswdUserDatabase.class);
private static final StringManager sm = StringManager.getManager(PasswdUserDatabase.class);
/**
* 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 Map<String,String> homes = new HashMap<>();
/**
* The UserConfig listener with which we are associated.
*/
private UserConfig userConfig = null;
@Override
public UserConfig getUserConfig() {
return userConfig;
}
@Override
public void setUserConfig(UserConfig userConfig) {
this.userConfig = userConfig;
init();
}
@Override
public String getHome(String user) {
return homes.get(user);
}
@Override
public Enumeration<String> getUsers() {
return Collections.enumeration(homes.keySet());
}
/**
* Initialize our set of users and home directories.
*/
private void init() {
try (BufferedReader reader = new BufferedReader(new FileReader(PASSWORD_FILE))) {
String line = reader.readLine();
while (line != null) {
String[] tokens = line.split(":");
// Need non-zero 1st and 6th tokens
if (tokens.length > 5 && !tokens[0].isEmpty() && !tokens[5].isEmpty()) {
// Add this user and corresponding directory
homes.put(tokens[0], tokens[5]);
}
line = reader.readLine();
}
} catch (Exception e) {
log.warn(sm.getString("passwdUserDatabase.readFail"), e);
}
}
}
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