CmdPWD.java

/*
Copyright 2009 David Revell

This file is part of SwiFTP.

SwiFTP is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

SwiFTP 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 Public License for more details.

You should have received a copy of the GNU General Public License
along with SwiFTP.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.swiftp;

import java.io.File;
import java.io.IOException;

import android.util.Log;

public class CmdPWD extends FtpCmd implements Runnable {
    // public static final String message = "TEMPLATE!!";

    public CmdPWD(SessionThread sessionThread, String input) {
        super(sessionThread, CmdPWD.class.toString());
    }

    public void run() {
        myLog.l(Log.DEBUG, "PWD executing");

        // We assume that the chroot restriction has been applied, and that
        // therefore the current directory is located somewhere within the
        // chroot directory. Therefore, we can just slice of the chroot
        // part of the current directory path in order to get the
        // user-visible path (inside the chroot directory).
        try {
            File workingDir = sessionThread.getWorkingDir();
            String currentDir = workingDir != null ? workingDir.getCanonicalPath() : Globals.getChrootDir()
                    .getCanonicalPath();
            currentDir = currentDir.substring(Globals.getChrootDir().getCanonicalPath().length());
            // The root directory requires special handling to restore its
            // leading slash
            if (currentDir.length() == 0) {
                currentDir = "/";
            }
            sessionThread.writeString("257 \"" + currentDir + "\"\r\n");
        } catch (IOException e) {
            // This shouldn't happen unless our input validation has failed
            myLog.l(Log.ERROR, "PWD canonicalize");
            sessionThread.closeSocket(); // should cause thread termination
        }
        myLog.l(Log.DEBUG, "PWD complete");
    }

}