From bbbc051aa70b8c3dc98218b7b7ca23bea588f41a Mon Sep 17 00:00:00 2001 From: Joe Robinson Date: Wed, 27 Oct 2010 17:16:37 +0100 Subject: Removed duplicate org.apache.commons files --- org/apache/commons/net/bsd/RExecClient.java | 292 ---------------------------- 1 file changed, 292 deletions(-) delete mode 100644 org/apache/commons/net/bsd/RExecClient.java (limited to 'org/apache/commons/net/bsd/RExecClient.java') diff --git a/org/apache/commons/net/bsd/RExecClient.java b/org/apache/commons/net/bsd/RExecClient.java deleted file mode 100644 index 2924120..0000000 --- a/org/apache/commons/net/bsd/RExecClient.java +++ /dev/null @@ -1,292 +0,0 @@ -/* - * 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.commons.net.bsd; - -import java.io.IOException; -import java.io.InputStream; -import java.io.OutputStream; -import java.net.ServerSocket; -import java.net.Socket; - -import org.apache.commons.net.SocketClient; -import org.apache.commons.net.io.SocketInputStream; - -/*** - * RExecClient implements the rexec() facility that first appeared in - * 4.2BSD Unix. This class will probably only be of use for connecting - * to Unix systems and only when the rexecd daemon is configured to run, - * which is a rarity these days because of the security risks involved. - * However, rexec() can be very useful for performing administrative tasks - * on a network behind a firewall. - *

- * As with virtually all of the client classes in org.apache.commons.net, this - * class derives from SocketClient, inheriting its connection methods. - * The way to use RExecClient is to first connect - * to the server, call the {@link #rexec rexec() } method, and then - * fetch the connection's input, output, and optionally error streams. - * Interaction with the remote command is controlled entirely through the - * I/O streams. Once you have finished processing the streams, you should - * invoke {@link #disconnect disconnect() } to clean up properly. - *

- * By default the standard output and standard error streams of the - * remote process are transmitted over the same connection, readable - * from the input stream returned by - * {@link #getInputStream getInputStream() }. However, it is - * possible to tell the rexecd daemon to return the standard error - * stream over a separate connection, readable from the input stream - * returned by {@link #getErrorStream getErrorStream() }. You - * can specify that a separate connection should be created for standard - * error by setting the boolean separateErrorStream - * parameter of {@link #rexec rexec() } to true . - * The standard input of the remote process can be written to through - * the output stream returned by - * {@link #getOutputStream getOutputSream() }. - *

- *

- * @author Daniel F. Savarese - * @see SocketClient - * @see RCommandClient - * @see RLoginClient - ***/ - -public class RExecClient extends SocketClient -{ - /*** - * The default rexec port. Set to 512 in BSD Unix. - ***/ - public static final int DEFAULT_PORT = 512; - - private boolean __remoteVerificationEnabled; - - /*** - * If a separate error stream is requested, _errorStream_ - * will point to an InputStream from which the standard error of the - * remote process can be read (after a call to rexec()). Otherwise, - * _errorStream_ will be null. - ***/ - protected InputStream _errorStream_; - - // This can be overridden in local package to implement port range - // limitations of rcmd and rlogin - InputStream _createErrorStream() throws IOException - { - ServerSocket server; - Socket socket; - - server = _serverSocketFactory_.createServerSocket(0, 1, getLocalAddress()); - - _output_.write(Integer.toString(server.getLocalPort()).getBytes()); - _output_.write('\0'); - _output_.flush(); - - socket = server.accept(); - server.close(); - - if (__remoteVerificationEnabled && !verifyRemote(socket)) - { - socket.close(); - throw new IOException( - "Security violation: unexpected connection attempt by " + - socket.getInetAddress().getHostAddress()); - } - - return (new SocketInputStream(socket, socket.getInputStream())); - } - - - /*** - * The default RExecClient constructor. Initializes the - * default port to DEFAULT_PORT . - ***/ - public RExecClient() - { - _errorStream_ = null; - setDefaultPort(DEFAULT_PORT); - } - - - /*** - * Returns the InputStream from which the standard outputof the remote - * process can be read. The input stream will only be set after a - * successful rexec() invocation. - *

- * @return The InputStream from which the standard output of the remote - * process can be read. - ***/ - public InputStream getInputStream() - { - return _input_; - } - - - /*** - * Returns the OutputStream through which the standard input of the remote - * process can be written. The output stream will only be set after a - * successful rexec() invocation. - *

- * @return The OutputStream through which the standard input of the remote - * process can be written. - ***/ - public OutputStream getOutputStream() - { - return _output_; - } - - - /*** - * Returns the InputStream from which the standard error of the remote - * process can be read if a separate error stream is requested from - * the server. Otherwise, null will be returned. The error stream - * will only be set after a successful rexec() invocation. - *

- * @return The InputStream from which the standard error of the remote - * process can be read if a separate error stream is requested from - * the server. Otherwise, null will be returned. - ***/ - public InputStream getErrorStream() - { - return _errorStream_; - } - - - /*** - * Remotely executes a command through the rexecd daemon on the server - * to which the RExecClient is connected. After calling this method, - * you may interact with the remote process through its standard input, - * output, and error streams. You will typically be able to detect - * the termination of the remote process after reaching end of file - * on its standard output (accessible through - * {@link #getInputStream getInputStream() }. Disconnecting - * from the server or closing the process streams before reaching - * end of file will not necessarily terminate the remote process. - *

- * If a separate error stream is requested, the remote server will - * connect to a local socket opened by RExecClient, providing an - * independent stream through which standard error will be transmitted. - * RExecClient will do a simple security check when it accepts a - * connection for this error stream. If the connection does not originate - * from the remote server, an IOException will be thrown. This serves as - * a simple protection against possible hijacking of the error stream by - * an attacker monitoring the rexec() negotiation. You may disable this - * behavior with {@link #setRemoteVerificationEnabled setRemoteVerificationEnabled()} - * . - *

- * @param username The account name on the server through which to execute - * the command. - * @param password The plain text password of the user account. - * @param command The command, including any arguments, to execute. - * @param separateErrorStream True if you would like the standard error - * to be transmitted through a different stream than standard output. - * False if not. - * @exception IOException If the rexec() attempt fails. The exception - * will contain a message indicating the nature of the failure. - ***/ - public void rexec(String username, String password, - String command, boolean separateErrorStream) - throws IOException - { - int ch; - - if (separateErrorStream) - { - _errorStream_ = _createErrorStream(); - } - else - { - _output_.write('\0'); - } - - _output_.write(username.getBytes()); - _output_.write('\0'); - _output_.write(password.getBytes()); - _output_.write('\0'); - _output_.write(command.getBytes()); - _output_.write('\0'); - _output_.flush(); - - ch = _input_.read(); - if (ch > 0) - { - StringBuffer buffer = new StringBuffer(); - - while ((ch = _input_.read()) != -1 && ch != '\n') - buffer.append((char)ch); - - throw new IOException(buffer.toString()); - } - else if (ch < 0) - { - throw new IOException("Server closed connection."); - } - } - - - /*** - * Same as rexec(username, password, command, false); - ***/ - public void rexec(String username, String password, - String command) - throws IOException - { - rexec(username, password, command, false); - } - - /*** - * Disconnects from the server, closing all associated open sockets and - * streams. - *

- * @exception IOException If there an error occurs while disconnecting. - ***/ - @Override - public void disconnect() throws IOException - { - if (_errorStream_ != null) - _errorStream_.close(); - _errorStream_ = null; - super.disconnect(); - } - - - /*** - * Enable or disable verification that the remote host connecting to - * create a separate error stream is the same as the host to which - * the standard out stream is connected. The default is for verification - * to be enabled. You may set this value at any time, whether the - * client is currently connected or not. - *

- * @param enable True to enable verification, false to disable verification. - ***/ - public final void setRemoteVerificationEnabled(boolean enable) - { - __remoteVerificationEnabled = enable; - } - - /*** - * Return whether or not verification of the remote host providing a - * separate error stream is enabled. The default behavior is for - * verification to be enabled. - *

- * @return True if verification is enabled, false if not. - ***/ - public final boolean isRemoteVerificationEnabled() - { - return __remoteVerificationEnabled; - } - -} - -- cgit v1.2.3