examples.RudimentaryPTY Maven / Gradle / Ivy
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/**
* Copyright 2009 sshj contributors
*
* 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 examples;
import net.schmizz.sshj.SSHClient;
import net.schmizz.sshj.common.StreamCopier;
import net.schmizz.sshj.connection.channel.direct.Session;
import net.schmizz.sshj.connection.channel.direct.Session.Shell;
import net.schmizz.sshj.transport.verification.ConsoleKnownHostsVerifier;
import net.schmizz.sshj.transport.verification.OpenSSHKnownHosts;
import java.io.File;
import java.io.IOException;
/** A very rudimentary psuedo-terminal based on console I/O. */
class RudimentaryPTY {
public static void main(String... args)
throws IOException {
final SSHClient ssh = new SSHClient();
final File khFile = new File(OpenSSHKnownHosts.detectSSHDir(), "known_hosts");
ssh.addHostKeyVerifier(new ConsoleKnownHostsVerifier(khFile, System.console()));
ssh.connect("localhost");
try {
ssh.authPublickey(System.getProperty("user.name"));
final Session session = ssh.startSession();
try {
session.allocateDefaultPTY();
final Shell shell = session.startShell();
new StreamCopier(shell.getInputStream(), System.out)
.bufSize(shell.getLocalMaxPacketSize())
.spawn("stdout");
new StreamCopier(shell.getErrorStream(), System.err)
.bufSize(shell.getLocalMaxPacketSize())
.spawn("stderr");
// Now make System.in act as stdin. To exit, hit Ctrl+D (since that results in an EOF on System.in)
// This is kinda messy because java only allows console input after you hit return
// But this is just an example... a GUI app could implement a proper PTY
new StreamCopier(System.in, shell.getOutputStream())
.bufSize(shell.getRemoteMaxPacketSize())
.copy();
} finally {
session.close();
}
} finally {
ssh.disconnect();
}
}
}