blob: 5c88e723202339c4dbc2820141279ddf4f68cfa6 [file] [log] [blame]
// Copyright 2017 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <sys/types.h>
#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 {
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,
base::Optional<uid_t> userId,
base::Optional<gid_t> groupId);
} // namespace virtual_file_provider