// Copyright (c) 2010 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef CHROME_BROWSER_IMPORTER_FIREFOX_PROFILE_LOCK_H__ #define CHROME_BROWSER_IMPORTER_FIREFOX_PROFILE_LOCK_H__ #include "build/build_config.h" #if defined(OS_WIN) #include <windows.h> #endif #include "base/basictypes.h" #include "base/files/file_path.h" #include "base/gtest_prod_util.h" // Firefox is designed to allow only one application to access its // profile at the same time. // Reference: // http://kb.mozillazine.org/Profile_in_use // // This class is based on Firefox code in: // profile/dirserviceprovider/src/nsProfileLock.cpp // The license block is: /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 2002 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Conrad Carlen <ccarlen@netscape.com> * Brendan Eich <brendan@mozilla.org> * Colin Blake <colin@theblakes.com> * Javier Pedemonte <pedemont@us.ibm.com> * Mats Palmgren <mats.palmgren@bredband.net> * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ class FirefoxProfileLock { public: explicit FirefoxProfileLock(const base::FilePath& path); ~FirefoxProfileLock(); // Locks and releases the profile. void Lock(); void Unlock(); // Returns true if we lock the profile successfully. bool HasAcquired(); private: FRIEND_TEST_ALL_PREFIXES(FirefoxProfileLockTest, ProfileLock); FRIEND_TEST_ALL_PREFIXES(FirefoxProfileLockTest, ProfileLockOrphaned); static const base::FilePath::CharType* kLockFileName; static const base::FilePath::CharType* kOldLockFileName; void Init(); // Full path of the lock file in the profile folder. base::FilePath lock_file_; // The handle of the lock file. #if defined(OS_WIN) HANDLE lock_handle_; #elif defined(OS_POSIX) int lock_fd_; // On Posix systems Firefox apparently first tries to put a fcntl lock // on a file and if that fails, it does a regular exculsive open on another // file. This variable contains the location of this other file. base::FilePath old_lock_file_; // Method that tries to put a fcntl lock on file specified by |lock_file_|. // Returns false if lock is already held by another process. true in all // other cases. bool LockWithFcntl(); #endif DISALLOW_COPY_AND_ASSIGN(FirefoxProfileLock); }; #endif // CHROME_BROWSER_IMPORTER_FIREFOX_PROFILE_LOCK_H__