| // Copyright 2017 The ChromiumOS Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef VIRTUAL_FILE_PROVIDER_FUSE_MAIN_H_ |
| #define VIRTUAL_FILE_PROVIDER_FUSE_MAIN_H_ |
| |
| #include <sys/types.h> |
| |
| #include <optional> |
| #include <string> |
| |
| #include <base/callback.h> |
| #include <base/files/file_path.h> |
| #include <base/files/scoped_file.h> |
| |
| namespace virtual_file_provider { |
| |
| // Delegate for FuseMain(). |
| class FuseMainDelegate { |
| public: |
| virtual ~FuseMainDelegate() = default; |
| |
| // Returns the size of the file, or returns -1 if the ID is invalid. |
| virtual int64_t GetSize(const std::string& id) = 0; |
| |
| // Handles a read request. Data should be written to the given FD. |
| virtual void HandleReadRequest(const std::string& id, |
| int64_t offset, |
| int64_t size, |
| base::ScopedFD fd) = 0; |
| |
| // FuseMain() calls this when an ID is released. |
| virtual void NotifyIdReleased(const std::string& id) = 0; |
| }; |
| |
| // Mounts the FUSE file system on the given path and runs the FUSE main loop. |
| // This doesn't exit until the FUSE main loop exits (e.g. the file system is |
| // unmounted, or this process is terminated). |
| // Returns the value returned by libfuse's fuse_main(). |
| int FuseMain(const base::FilePath& mount_path, |
| FuseMainDelegate* delegate, |
| std::optional<uid_t> userId, |
| std::optional<gid_t> groupId); |
| |
| } // namespace virtual_file_provider |
| |
| #endif // VIRTUAL_FILE_PROVIDER_FUSE_MAIN_H_ |