// check if sudo password is correct (so sudo can be used in all other scripts, even without
  // password, lasts for 5 minutes)
  private void doSudoCmd() {
    String pass = passwordField.getText();

    File file = null;
    try {
      // write file in /tmp
      file = new File("/tmp/cmd_sudo.sh"); // ""c:/temp/run.bat""
      FileOutputStream fos = new FileOutputStream(file);
      fos.write("echo $password | sudo -S ls\nexit $?".getBytes()); // "echo $password > pipo.txt"
      fos.close();

      // execute
      HashMap vars = new HashMap();
      vars.put("password", pass);

      List oses = new ArrayList();
      oses.add(
          new OsConstraint(
              "unix", null, null,
              null)); // "windows",System.getProperty("os.name"),System.getProperty("os.version"),System.getProperty("os.arch")));

      ArrayList plist = new ArrayList();
      ParsableFile pf = new ParsableFile(file.getAbsolutePath(), null, null, oses);
      plist.add(pf);
      ScriptParser sp = new ScriptParser(plist, new VariableSubstitutor(vars));
      sp.parseFiles();

      ArrayList elist = new ArrayList();
      ExecutableFile ef =
          new ExecutableFile(
              file.getAbsolutePath(),
              ExecutableFile.POSTINSTALL,
              ExecutableFile.ABORT,
              oses,
              false);
      elist.add(ef);
      FileExecutor fe = new FileExecutor(elist);
      int retval = fe.executeFiles(ExecutableFile.POSTINSTALL, this);
      if (retval == 0) {
        idata.setVariable("password", pass);
        isValid = true;
      }
      //			else is already showing dialog
      //			{
      //				JOptionPane.showMessageDialog(this, "Cannot execute 'sudo' cmd, check your password",
      // "Error", JOptionPane.ERROR_MESSAGE);
      //			}
    } catch (Exception e) {
      //				JOptionPane.showMessageDialog(this, "Cannot execute 'sudo' cmd, check your password",
      // "Error", JOptionPane.ERROR_MESSAGE);
      e.printStackTrace();
      isValid = false;
    }
    try {
      if (file != null && file.exists())
        file.delete(); // you don't want the file with password tobe arround, in case of error
    } catch (Exception e) {
      // ignore
    }
  }
  /** The run method. */
  public void run() {
    instances.add(this);
    try {
      listener.startUnpack();
      String currentOs = System.getProperty("os.name").toLowerCase();
      //
      // Initialisations
      FileOutputStream out = null;
      ArrayList parsables = new ArrayList();
      ArrayList executables = new ArrayList();
      List packs = idata.selectedPacks;
      int npacks = packs.size();
      udata = UninstallData.getInstance();

      // Specific to the web installers
      if (idata.kind.equalsIgnoreCase("web") || idata.kind.equalsIgnoreCase("web-kunststoff")) {
        InputStream kin = getClass().getResourceAsStream("/res/WebInstallers.url");
        BufferedReader kreader = new BufferedReader(new InputStreamReader(kin));
        jarLocation = kreader.readLine();
      }

      // We unpack the selected packs
      for (int i = 0; i < npacks; i++) {
        // We get the pack stream
        int n = idata.allPacks.indexOf(packs.get(i));
        ObjectInputStream objIn = new ObjectInputStream(getPackAsStream(n));

        // We unpack the files
        int nfiles = objIn.readInt();
        listener.changeUnpack(0, nfiles, ((Pack) packs.get(i)).name);
        for (int j = 0; j < nfiles; j++) {
          // We read the header
          PackFile pf = (PackFile) objIn.readObject();
          if (null == pf.os || matchOS(currentOs, pf.os.toLowerCase())) {
            // We translate & build the path
            String path = translatePath(pf.targetPath);
            File pathFile = new File(path);
            String fname = pathFile.getName();
            int z = fname.length();
            File dest = pathFile.getParentFile();
            if (!dest.exists()) dest.mkdirs();

            // We add the path to the log,
            udata.addFile(path);

            listener.progressUnpack(j, path);

            // if this file exists and shouldnot override skip this file
            if (((pf.override == false) && (pathFile.exists()))) {
              objIn.skip(pf.length);
              continue;
            }

            // We copy the file
            out = new FileOutputStream(path);
            byte[] buffer = new byte[5120];
            long bytesCopied = 0;
            while (bytesCopied < pf.length) {
              int maxBytes =
                  (pf.length - bytesCopied < buffer.length
                      ? (int) (pf.length - bytesCopied)
                      : buffer.length);
              int bytesInBuffer = objIn.read(buffer, 0, maxBytes);
              if (bytesInBuffer == -1) throw new IOException("Unexpected end of stream");

              out.write(buffer, 0, bytesInBuffer);

              bytesCopied += bytesInBuffer;
            }
            // Cleanings
            out.close();

            // Empty dirs restoring
            String _n = pathFile.getName();
            if (_n.startsWith("izpack-keepme") && _n.endsWith(".tmp")) pathFile.delete();

          } else objIn.skip(pf.length);
        }

        // Load information about parsable files
        int numParsables = objIn.readInt();
        int k;
        for (k = 0; k < numParsables; k++) {
          ParsableFile pf = (ParsableFile) objIn.readObject();
          pf.path = translatePath(pf.path);
          parsables.add(pf);
        }

        // Load information about executable files
        int numExecutables = objIn.readInt();
        for (k = 0; k < numExecutables; k++) {
          ExecutableFile ef = (ExecutableFile) objIn.readObject();
          ef.path = translatePath(ef.path);
          if (null != ef.argList && !ef.argList.isEmpty()) {
            String arg = null;
            for (int j = 0; j < ef.argList.size(); j++) {
              arg = (String) ef.argList.get(j);
              arg = translatePath(arg);
              ef.argList.set(j, arg);
            }
          }
          executables.add(ef);
          if (ef.executionStage == ExecutableFile.UNINSTALL) {
            udata.addExecutable(ef);
          }
        }
        objIn.close();
      }

      // We use the scripts parser
      ScriptParser parser = new ScriptParser(parsables, vs);
      parser.parseFiles();

      // We use the file executor
      FileExecutor executor = new FileExecutor(executables);
      if (executor.executeFiles(ExecutableFile.POSTINSTALL) != 0)
        javax.swing.JOptionPane.showMessageDialog(
            null,
            "The installation was not completed.",
            "Installation warning",
            javax.swing.JOptionPane.WARNING_MESSAGE);

      // We put the uninstaller
      putUninstaller();

      // The end :-)
      listener.stopUnpack();
    } catch (Exception err) {
      listener.stopUnpack();
      listener.errorUnpack(err.toString());
    }
    instances.remove(instances.indexOf(this));
  }