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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_FILE_ACCESS_SCOPED_FILE_ACCESS_H_
#define COMPONENTS_FILE_ACCESS_SCOPED_FILE_ACCESS_H_
#include "base/component_export.h"
#include "build/build_config.h"
#if BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
#include "base/files/scoped_file.h"
#endif
namespace file_access {
// Move-only object to handle access token to open files.
// After the object destruction, the caller may lose access to open some of the
// requested files.
// Platform-dependant as holds ScopedFD as a token, when supported.
class COMPONENT_EXPORT(FILE_ACCESS) ScopedFileAccess {
public:
ScopedFileAccess(ScopedFileAccess&& other);
ScopedFileAccess& operator=(ScopedFileAccess&& other);
ScopedFileAccess(const ScopedFileAccess&) = delete;
ScopedFileAccess& operator=(const ScopedFileAccess&) = delete;
virtual ~ScopedFileAccess();
bool is_allowed() const { return allowed_; }
#if BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
ScopedFileAccess(bool allowed, base::ScopedFD fd);
#else
explicit ScopedFileAccess(bool allowed);
#endif
// Object identifying allowed access.
static ScopedFileAccess Allowed();
// Object identifying denied access.
static ScopedFileAccess Denied();
private:
bool allowed_;
#if BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
// Holds access token. When closed, access may be revoked.
base::ScopedFD lifeline_fd_;
#endif
};
} // namespace file_access
#endif // COMPONENTS_FILE_ACCESS_SCOPED_FILE_ACCESS_H_
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