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Support for a virtual sessions, custom command execution etc.

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package com.sshtools.server.vsession;

/*-
 * #%L
 * Virtual Sessions
 * %%
 * Copyright (C) 2002 - 2024 JADAPTIVE Limited
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * #L%
 */

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.InterruptedIOException;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.cli.ParseException;
import org.jline.reader.Candidate;
import org.jline.reader.EndOfFileException;
import org.jline.reader.LineReader;
import org.jline.reader.ParsedLine;

import com.sshtools.common.files.AbstractFile;
import com.sshtools.common.logger.Log;
import com.sshtools.common.permissions.PermissionDeniedException;
import com.sshtools.common.shell.ShellPolicy;
import com.sshtools.common.util.Utils;
import com.sshtools.server.vsession.CmdLine.Condition;
import com.sshtools.server.vsession.commands.Alias;


public class Msh extends ShellCommand {
	private Throwable lastError;

	private boolean exit;
	private String prompt;
	protected CommandFactory commandFactory;

	protected Map runningJobs = new HashMap<>();
	private long nextJobId = 1;
	public static final String LOGIN_CONTEXT = "loginContext";

	private List listeners = new ArrayList<>();
	
	public Msh(CommandFactory commandFactory) {
		super("msh", SUBSYSTEM_SHELL, "Usage: msh