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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
* <p/>
* http://www.apache.org/licenses/LICENSE-2.0
* <p/>
* 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 com.cloudera.itest.posix
class UGI {
/**
* Local cache for POSIX user information (as specified in /etc/passwd).
* The key is a username and values are maps with the following information for
* each user: passwd (password), uid (numeric user ID), gid (numeric group ID),
* descr (textual user description), home (user home directory),
* shell (default shell of the user).
*
* NOTE: all these bits of information are stored as Strings (even uid, gid).
*/
Map users;
/**
* Local cache for POSIX group information (as specified in /etc/group).
* The key is a groupname and values are maps with the following information for
* each group: passwd (password), gid (numeric group ID), users (list of all users
* belonging to this group as reported by id(1)).
*
* NOTE: all these bits of information are stored as Strings (even gid).
*/
Map groups;
/**
* Synchronizes caches (users and groups) with /etc/passwd and /etc/group
*/
public void refresh() {
users = [:];
groups = [:];
Map tmp_groups = [:];
(new File("/etc/passwd")).eachLine {
// NOTE: the :x bit is a workaround for split to work on strings like +::::::
def chunks = "${it}:x".split(':');
users[chunks[0]] = [ passwd : chunks[1],
uid : chunks[2],
gid : chunks[3],
descr : chunks[4],
home : chunks[5],
shell : chunks[6],
];
tmp_groups[chunks[3]] = chunks[0];
}
(new File("/etc/group")).eachLine {
def chunks = it.split(':');
groups[chunks[0]] = [ passwd : chunks[1],
gid : chunks[2],
users : ((chunks.size() == 4) ? chunks[3].split(',').toList() : []),
];
if (tmp_groups[chunks[2]] != null) {
groups[chunks[0]].users.add(tmp_groups[chunks[2]]);
}
}
}
public UGI() {
refresh();
}
}
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