| // Copyright (C) 2008 The Android Open Source Project |
| // |
| // Licensed 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 com.google.gerrit.sshd; |
| |
| import org.apache.sshd.common.Factory; |
| import org.apache.sshd.server.Command; |
| import org.apache.sshd.server.Environment; |
| import org.apache.sshd.server.ExitCallback; |
| import org.eclipse.jgit.lib.Constants; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| /** |
| * Dummy shell which prints a message and terminates. |
| * <p> |
| * This implementation is used to ensure clients who try to SSH directly to this |
| * server without supplying a command will get a reasonable error message, but |
| * cannot continue further. |
| */ |
| class NoShell implements Factory<Command> { |
| public Command create() { |
| return new Command() { |
| private InputStream in; |
| private OutputStream out; |
| private OutputStream err; |
| private ExitCallback exit; |
| |
| public void setInputStream(final InputStream in) { |
| this.in = in; |
| } |
| |
| public void setOutputStream(final OutputStream out) { |
| this.out = out; |
| } |
| |
| public void setErrorStream(final OutputStream err) { |
| this.err = err; |
| } |
| |
| public void setExitCallback(final ExitCallback callback) { |
| this.exit = callback; |
| } |
| |
| public void start(final Environment env) throws IOException { |
| err.write(Constants.encodeASCII("gerrit: no shell available\r\n")); |
| err.flush(); |
| |
| in.close(); |
| out.close(); |
| err.close(); |
| exit.onExit(127); |
| } |
| |
| public void destroy() { |
| } |
| }; |
| } |
| } |