org.jline.builtins.ssh.ShellFactoryImpl Maven / Gradle / Ivy
/*
* Copyright (c) 2002-2017, the original author or authors.
*
* This software is distributable under the BSD license. See the terms of the
* BSD license in the documentation provided with this software.
*
* http://www.opensource.org/licenses/bsd-license.php
*/
package org.jline.builtins.ssh;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;
import java.util.function.Consumer;
import org.apache.sshd.common.Factory;
import org.apache.sshd.common.channel.PtyMode;
import org.apache.sshd.server.Command;
import org.apache.sshd.server.Environment;
import org.apache.sshd.server.ExitCallback;
import org.apache.sshd.server.SessionAware;
import org.apache.sshd.server.Signal;
import org.apache.sshd.server.session.ServerSession;
import org.jline.terminal.Attributes;
import org.jline.terminal.Attributes.ControlChar;
import org.jline.terminal.Attributes.InputFlag;
import org.jline.terminal.Attributes.LocalFlag;
import org.jline.terminal.Attributes.OutputFlag;
import org.jline.terminal.Size;
import org.jline.terminal.Terminal;
import org.jline.terminal.TerminalBuilder;
/**
* SSHD {@link org.apache.sshd.server.Command} factory which provides access to
* Shell.
*/
public class ShellFactoryImpl implements Factory {
private final Consumer shell;
public ShellFactoryImpl(Consumer shell) {
this.shell = shell;
}
private static void flush(OutputStream... streams) {
for (OutputStream s : streams) {
try {
s.flush();
} catch (IOException e) {
// Ignore
}
}
}
static void close(Closeable... closeables) {
for (Closeable c : closeables) {
try {
c.close();
} catch (IOException e) {
// Ignore
}
}
}
public Command create() {
return new ShellImpl();
}
public class ShellImpl implements Command, SessionAware {
private InputStream in;
private OutputStream out;
private OutputStream err;
private ExitCallback callback;
private ServerSession session;
private boolean closed;
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(ExitCallback callback) {
this.callback = callback;
}
public void setSession(ServerSession session) {
this.session = session;
}
public void start(final Environment env) throws IOException {
try {
new Thread(() -> {
try {
ShellImpl.this.run(env);
} catch (Throwable t) {
t.printStackTrace();
}
}).start();
} catch (Exception e) {
throw new IOException("Unable to start shell", e);
}
}
public void run(Environment env) throws Exception {
try {
Terminal terminal = TerminalBuilder.builder()
.name("JLine SSH")
.type(env.getEnv().get("TERM"))
.system(false)
.streams(in, out)
.build();
terminal.setSize(new Size(Integer.parseInt(env.getEnv().get("COLUMNS")),
Integer.parseInt(env.getEnv().get("LINES"))));
Attributes attr = terminal.getAttributes();
for (Map.Entry e : env.getPtyModes().entrySet()) {
switch (e.getKey()) {
case VINTR:
attr.setControlChar(ControlChar.VINTR, e.getValue());
break;
case VQUIT:
attr.setControlChar(ControlChar.VQUIT, e.getValue());
break;
case VERASE:
attr.setControlChar(ControlChar.VERASE, e.getValue());
break;
case VKILL:
attr.setControlChar(ControlChar.VKILL, e.getValue());
break;
case VEOF:
attr.setControlChar(ControlChar.VEOF, e.getValue());
break;
case VEOL:
attr.setControlChar(ControlChar.VEOL, e.getValue());
break;
case VEOL2:
attr.setControlChar(ControlChar.VEOL2, e.getValue());
break;
case VSTART:
attr.setControlChar(ControlChar.VSTART, e.getValue());
break;
case VSTOP:
attr.setControlChar(ControlChar.VSTOP, e.getValue());
break;
case VSUSP:
attr.setControlChar(ControlChar.VSUSP, e.getValue());
break;
case VDSUSP:
attr.setControlChar(ControlChar.VDSUSP, e.getValue());
break;
case VREPRINT:
attr.setControlChar(ControlChar.VREPRINT, e.getValue());
break;
case VWERASE:
attr.setControlChar(ControlChar.VWERASE, e.getValue());
break;
case VLNEXT:
attr.setControlChar(ControlChar.VLNEXT, e.getValue());
break;
/*
case VFLUSH:
attr.setControlChar(ControlChar.VMIN, e.getValue());
break;
case VSWTCH:
attr.setControlChar(ControlChar.VTIME, e.getValue());
break;
*/
case VSTATUS:
attr.setControlChar(ControlChar.VSTATUS, e.getValue());
break;
case VDISCARD:
attr.setControlChar(ControlChar.VDISCARD, e.getValue());
break;
case ECHO:
attr.setLocalFlag(LocalFlag.ECHO, e.getValue() != 0);
break;
case ICANON:
attr.setLocalFlag(LocalFlag.ICANON, e.getValue() != 0);
break;
case ISIG:
attr.setLocalFlag(LocalFlag.ISIG, e.getValue() != 0);
break;
case ICRNL:
attr.setInputFlag(InputFlag.ICRNL, e.getValue() != 0);
break;
case INLCR:
attr.setInputFlag(InputFlag.INLCR, e.getValue() != 0);
break;
case IGNCR:
attr.setInputFlag(InputFlag.IGNCR, e.getValue() != 0);
break;
case OCRNL:
attr.setOutputFlag(OutputFlag.OCRNL, e.getValue() != 0);
break;
case ONLCR:
attr.setOutputFlag(OutputFlag.ONLCR, e.getValue() != 0);
break;
case ONLRET:
attr.setOutputFlag(OutputFlag.ONLRET, e.getValue() != 0);
break;
case OPOST:
attr.setOutputFlag(OutputFlag.OPOST, e.getValue() != 0);
break;
}
}
terminal.setAttributes(attr);
env.addSignalListener(signals -> {
terminal.setSize(new Size(Integer.parseInt(env.getEnv().get("COLUMNS")),
Integer.parseInt(env.getEnv().get("LINES"))));
terminal.raise(Terminal.Signal.WINCH);
}, Signal.WINCH);
shell.accept(new Ssh.ShellParams(env.getEnv(), terminal, this::destroy));
} catch (Throwable t) {
t.printStackTrace();
}
}
public void destroy() {
if (!closed) {
closed = true;
flush(out, err);
close(in, out, err);
callback.onExit(0);
}
}
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy