chromium/mojo/public/cpp/base/read_only_file_mojom_traits.cc

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "mojo/public/cpp/base/read_only_file_mojom_traits.h"

#include "base/files/file.h"
#include "build/build_config.h"

#if BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#endif  // BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)

#if BUILDFLAG(IS_WIN)
#include <windows.h>

#include "base/win/security_util.h"
#endif  // BUILDFLAG(IS_WIN)

namespace mojo {
namespace {

// True if the underlying handle is only readable. Where possible this excludes
// deletion, writing, truncation, append and other operations that might modify
// the underlying file. False if we can tell that the file could be modified.
// On platforms where we cannot test the handle, always returns true.
bool IsReadOnlyFile(base::File& file) { … }

bool IsPhysicalFile(base::File& file) { … }

}  // namespace

mojo::PlatformHandle StructTraits<mojo_base::mojom::ReadOnlyFileDataView,
                                  base::File>::fd(base::File& file) { … }

bool StructTraits<mojo_base::mojom::ReadOnlyFileDataView, base::File>::Read(
    mojo_base::mojom::ReadOnlyFileDataView data,
    base::File* file) { … }

}  // namespace mojo