/*************************************fileManager.java*************************************/

package file_manager;
import java.io.*;

public class fileManager {

    public static void main (String[] args) {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        superCmd cmd = new superCmd();
        String temp = null;

        do {
            try { temp = br.readLine(); }
            catch (IOException e) { System.out.println("Olvasási hiba!"); }

        } while (cmd.doCmd(temp) == 1);
    }
}

/***************************************superCmd.java**************************************/

package file_manager;
import java.io.*;

public class superCmd {
    private File dir;

    public superCmd () {
        dir = new File (".");
    }

/*********************************************Listing*********************************************/

    public void ls (String[] args) {
        File[] temp = dir.listFiles();

        for (int i=0; i<temp.length; i++) {
            if (args.length==1 || !args[1].equals("-l")) {
                System.out.println(temp[i].getName());
                continue;
            }

            if (temp[i].isDirectory()==true) {
                System.out.println("d " + temp[i].getName());
            }
            else {
                System.out.println("f " + temp[i].getName() + "\t" + temp[i].length() + " bájt");
            }
        }
    }

/********************************************ChangeDir********************************************/

    public void cd (String[] args) {
        System.out.println("cd");

        if (args.length<2) {
            return;
        }
        if (args[1]=="..") {
            dir=dir.getParentFile();
        }
        else {
            try {
                dir = new File (dir.getCanonicalFile() + File.separator + args[1]);
            } catch (IOException e) {
                System.out.println ("Nem létező könyvtár!");
            }
        }
    }

/*********************************************MakeDir*********************************************/

    public void mkdir (String [] args) {
        if (args.length<2) {
            return;
        }

        try {
            System.out.println (dir.getCanonicalPath() + File.separator + args[1]);
            new File (dir.getCanonicalFile() + File.separator + args[1]).mkdir();
        } catch (IOException e) {
            System.out.println ("Már létezik a fájl!");
        }
    }

/*****************************************PrintWorkingDir*****************************************/

    public void pwd () {
        try {
            System.out.println (dir.getCanonicalPath());
        } catch (IOException e) {}
    }

/*********************************************Handler*********************************************/

    public int doCmd (String arg) {
        String[] cmd = arg.split(" ");

             if (cmd[0].equals("ls")==true) ls(cmd);
        else if (cmd[0].equals("cd")==true) cd(cmd);
        else if (cmd[0].equals("mkdir")==true) mkdir(cmd);
        else if (cmd[0].equals("pwd")==true) pwd();
        else if (cmd[0].equals("exit")==true) return 0;
        else System.out.println("Hibás parancs!");

        return 1;
    }
}