001 /*
002 * Copyright (C) 2012 eXo Platform SAS.
003 *
004 * This is free software; you can redistribute it and/or modify it
005 * under the terms of the GNU Lesser General Public License as
006 * published by the Free Software Foundation; either version 2.1 of
007 * the License, or (at your option) any later version.
008 *
009 * This software is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public
015 * License along with this software; if not, write to the Free
016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018 */
019 package org.crsh.ssh.term;
020
021 import org.crsh.console.jline.Terminal;
022 import org.crsh.console.jline.console.ConsoleReader;
023 import org.apache.sshd.server.Environment;
024 import org.crsh.console.jline.JLineProcessor;
025 import org.crsh.shell.Shell;
026 import org.crsh.util.Utils;
027
028 import java.io.IOException;
029 import java.io.InputStream;
030 import java.io.OutputStream;
031 import java.io.PrintStream;
032 import java.nio.charset.Charset;
033 import java.security.Principal;
034 import java.util.concurrent.atomic.AtomicBoolean;
035 import java.util.logging.Level;
036 import java.util.logging.Logger;
037
038 public class CRaSHCommand extends AbstractCommand implements Runnable, Terminal {
039
040 /** . */
041 protected static final Logger log = Logger.getLogger(CRaSHCommand.class.getName());
042
043 /** . */
044 private final CRaSHCommandFactory factory;
045
046 /** . */
047 private Thread thread;
048
049 /** . */
050 private String encoding;
051
052 public CRaSHCommand(CRaSHCommandFactory factory) {
053 this.factory = factory;
054 }
055
056 /** . */
057 private SSHContext context;
058
059 /** . */
060 private JLineProcessor console;
061
062 public void start(Environment env) throws IOException {
063 context = new SSHContext(env);
064 encoding = context.encoding != null ? context.encoding.name() : factory.encoding.name();
065 thread = new Thread(this, "CRaSH");
066
067 //
068 thread.start();
069 }
070
071 public SSHContext getContext() {
072 return context;
073 }
074
075 public void destroy() {
076 Utils.close(console);
077 thread.interrupt();
078 }
079
080 public void run() {
081 final AtomicBoolean exited = new AtomicBoolean(false);
082 try {
083 final String userName = session.getAttribute(SSHLifeCycle.USERNAME);
084 Principal user = new Principal() {
085 public String getName() {
086 return userName;
087 }
088 };
089 Shell shell = factory.shellFactory.create(user);
090 ConsoleReader reader = new ConsoleReader(in, out, this) {
091 @Override
092 public void shutdown() {
093 exited.set(true);
094 callback.onExit(0);
095 super.shutdown();
096 }
097 };
098 JLineProcessor processor = new JLineProcessor(true, shell, reader, new PrintStream(out, false, encoding), "\r\n");
099 processor.run();
100 } catch (java.io.InterruptedIOException e) {
101 // Expected behavior because of the onExit callback in the shutdown above
102 // clear interrupted status on purpose
103 Thread.interrupted();
104 } catch (Exception e) {
105 log.log(Level.WARNING, "Error during execution", e);
106 } finally {
107 // Make sure we call it
108 if (!exited.get()) {
109 callback.onExit(0);
110 }
111 }
112 }
113
114 //
115
116 @Override
117 public String getOutputEncoding() {
118 return encoding;
119 }
120
121 @Override
122 public void init() throws Exception {
123 }
124
125 @Override
126 public void restore() throws Exception {
127 }
128
129 @Override
130 public void reset() throws Exception {
131 }
132
133 @Override
134 public boolean isSupported() {
135 return true;
136 }
137
138 @Override
139 public int getWidth() {
140 return context.getWidth();
141 }
142
143 @Override
144 public int getHeight() {
145 return context.getHeight();
146 }
147
148 @Override
149 public boolean isAnsiSupported() {
150 return true;
151 }
152
153 @Override
154 public OutputStream wrapOutIfNeeded(OutputStream out) {
155 return out;
156 }
157
158 @Override
159 public InputStream wrapInIfNeeded(InputStream in) throws IOException {
160 return in;
161 }
162
163 @Override
164 public boolean hasWeirdWrap() {
165 return false;
166 }
167
168 @Override
169 public boolean isEchoEnabled() {
170 return false;
171 }
172
173 @Override
174 public void setEchoEnabled(boolean enabled) {
175 }
176 }
177
178