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// Copyright 2018 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 <memory>
#include <set>
#include <string>
#include <vector>
#include <base/callback.h>
#include <base/files/file_path.h>
#include <base/files/file_util.h>
#include <libimageloader/manifest.h>
#include "dlcservice/boot/boot_slot.h"
namespace dlcservice {
extern char kDlcDirAName[];
extern char kDlcDirBName[];
// Important DLC file names.
extern char kDlcImageFileName[];
extern char kManifestName[];
// The directory inside a DLC module that contains all the DLC files.
extern char kRootDirectoryInsideDlcModule[];
// Permissions for DLC files and directories.
extern const int kDlcFilePerms;
extern const int kDlcDirectoryPerms;
template <typename Arg>
base::FilePath JoinPaths(Arg&& path) {
return base::FilePath(path);
template <typename Arg, typename... Args>
base::FilePath JoinPaths(Arg&& path, Args&&... paths) {
return base::FilePath(path).Append(JoinPaths(paths...));
// Writes |data| into file |path|. Returns true if all |size| of |data| are
// written.
bool WriteToFile(const base::FilePath& path, const std::string& data);
// Same as |WriteToFile| but it does not alter the size of the file if the size
// of |data| is smaller than the size of the file on disk.
bool WriteToImage(const base::FilePath& path, const std::string& data);
// Creates a directory with permissions required for DLC modules.
bool CreateDir(const base::FilePath& path);
// Creates a directory with an empty file and resizes it.
bool CreateFile(const base::FilePath& path, int64_t size);
// Resizes the file in |path| to a new |size|. When shrinking, meaning current
// file size is > |size|, the file will only be resized and not unsparsed as the
// resized file is already assumed to be unsparse. When increasing, meaning
// current file size is < |size|, the file will be resized and unsparsed only
// to the portions that increased from current file size to |size|. When neither
// shrinking nor increasing, nothing happens.
bool ResizeFile(const base::FilePath& path, int64_t size);
// Hashes the file at |path|.
bool HashFile(const base::FilePath& path,
int64_t size,
std::vector<uint8_t>* sha256);
// Copies and hashes the |from| file.
bool CopyAndHashFile(const base::FilePath& from,
const base::FilePath& to,
int64_t size,
std::vector<uint8_t>* sha256);
// Returns the path to a DLC module image given the |id| and |package|.
base::FilePath GetDlcImagePath(const base::FilePath& dlc_module_root_path,
const std::string& id,
const std::string& package,
BootSlot::Slot current_slot);
std::shared_ptr<imageloader::Manifest> GetDlcManifest(
const base::FilePath& dlc_manifest_path,
const std::string& id,
const std::string& package);
// Scans a directory and returns all its subdirectory names in a list.
std::set<std::string> ScanDirectory(const base::FilePath& dir);
} // namespace dlcservice