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**  This file is part of Vidalia, and is subject to the license terms in the
**  LICENSE file, found in the top level directory of this distribution. If you
**  did not receive the LICENSE file with this file, you may obtain it from the
**  Vidalia source package distributed by the Vidalia Project at
**  http://www.vidalia-project.net/. No part of Vidalia, including this file,
**  may be copied, modified, propagated, or distributed except according to the
**  terms described in the LICENSE file.

** \file main.cpp
** \version $Id: main.cpp 2648 2008-06-03 03:34:42Z edmanm $
** \brief Main Vidalia entry point

#include <QObject>
#include <vidalia.h>
#include <mainwindow.h>
#include <vmessagebox.h>
#include <procutil.h>
#include <stringutil.h>

#if defined(Q_OS_WIN32)
#include <QSysInfo>

/** Returns true if there is already another Vidalia process running. */
is_vidalia_running(QString pidfile)
  /* Read the pidfile and find out if that process still exists */
  qint64 pid = read_pidfile(pidfile);
  if (pid > 0) {
#if defined(Q_OS_WIN32)
    if (QSysInfo::WindowsVersion == QSysInfo::WV_NT) {
      /* We currently can't get a list of running processes on Windows NT, so
       * be pessimistic and assume the existence of a nonzero pidfile means
       * Vidalia is running. */
      return true;
    } else
      return (is_process_running(pid));
    return (is_process_running(pid));
  return false;

/** Main application entry point. */
main(int argc, char *argv[])
  QStringList args = char_array_to_stringlist(argv+1, argc-1);

  /* Construct the application object. Qt strips any command-line arguments
   * that it recognizes in argv, so we'll pass a stringlist of the original
   * list of command-line arguments too. */
  Vidalia vidalia(args, argc, argv);
  vNotice("Vidalia %1 using Qt %2").arg(Vidalia::version())

  /* Validate any command-line arguments, or show usage message box, if
   * necessary. */
  QString errmsg;
  if (vidalia.showUsage()) {
    return 0;
  } else if (!vidalia.validateArguments(errmsg)) {
    vError("Unable to apply command-line arguments: %1").arg(errmsg);
        QT_TRANSLATE_NOOP("Vidalia", "Invalid Argument")), errmsg,
    return 1;

  /* Check if Vidalia is already running. */
  QString pidfile = vidalia.pidFile();
  if (is_vidalia_running(pidfile)) {
    vWarn("Detected another process with pid %1. Is Vidalia already running?")
    /* Let the user know another Vidalia is running and we are going to exit
     * now. */
    int ret = VMessageBox::critical(0, 
                  QT_TRANSLATE_NOOP("Vidalia", "Vidalia is already running")),
                    "Another Vidalia process is possibly already running. "
                    "If there really is not another Vidalia process running, "
                    "you can choose to continue anyway.\n\n"
                    "Would you like to continue starting Vidalia?")),
                VMessageBox::Continue, VMessageBox::Quit|VMessageBox::Default);
    if (ret != VMessageBox::Continue) {
      /* Don't start a second instance of Vidalia */
      vError("Exiting duplicate Vidalia process.");
      return 1;

  /* Since we don't have a visible main window, if we were to display a
   * QMessageBox (for example, to display an error when starting or stopping
   * Tor) then the application would exit when that message box was closed.
   * Setting quitOnLastWindowClosed to false fixes this behavior. */

  /* Create an instance of the main window  */
  MainWindow mainWin;

  /* Run Vidalia */
  int ret = vidalia.run();

  /* Vidalia exited, so cleanup our pidfile and return */
  vNotice("Vidalia is exiting cleanly (return code %1).").arg(ret);
  return ret;

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