| // Copyright 2014 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. |
| |
| // MtabWatcherLinux listens for mount point changes from a mtab file and |
| // notifies a StorageMonitorLinux about them. |
| // MtabWatcherLinux lives on the FILE thread. |
| |
| #ifndef COMPONENTS_STORAGE_MONITOR_MTAB_WATCHER_LINUX_H_ |
| #define COMPONENTS_STORAGE_MONITOR_MTAB_WATCHER_LINUX_H_ |
| |
| #if defined(OS_CHROMEOS) |
| #error "ChromeOS does not use MtabWatcherLinux." |
| #endif |
| |
| #include <map> |
| |
| #include "base/basictypes.h" |
| #include "base/files/file_path.h" |
| #include "base/files/file_path_watcher.h" |
| #include "base/memory/weak_ptr.h" |
| |
| namespace storage_monitor { |
| |
| class MtabWatcherLinux { |
| public: |
| // (mount point, mount device) |
| // A mapping from mount point to mount device, as extracted from the mtab |
| // file. |
| typedef std::map<base::FilePath, base::FilePath> MountPointDeviceMap; |
| |
| class Delegate { |
| public: |
| virtual ~Delegate() {} |
| |
| // Parses |new_mtab| and find all changes. Called on the UI thread. |
| virtual void UpdateMtab(const MountPointDeviceMap& new_mtab) = 0; |
| }; |
| |
| MtabWatcherLinux(const base::FilePath& mtab_path, |
| base::WeakPtr<Delegate> delegate); |
| ~MtabWatcherLinux(); |
| |
| private: |
| // Reads mtab file entries into |mtab|. |
| void ReadMtab() const; |
| |
| // Called when |mtab_path_| changes. |
| void OnFilePathChanged(const base::FilePath& path, bool error); |
| |
| // Mtab file that lists the mount points. |
| const base::FilePath mtab_path_; |
| |
| // Watcher for |mtab_path_|. |
| base::FilePathWatcher file_watcher_; |
| |
| base::WeakPtr<Delegate> delegate_; |
| |
| base::WeakPtrFactory<MtabWatcherLinux> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MtabWatcherLinux); |
| }; |
| |
| } // namespace storage_monitor |
| |
| #endif // COMPONENTS_STORAGE_MONITOR_MTAB_WATCHER_LINUX_H_ |