1 /* 2 * Copyright (C) 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <memory> 20 21 #include <utils/Errors.h> 22 #include <vintf/Dirmap.h> 23 #include <vintf/FileSystem.h> 24 25 namespace android::vintf::details { 26 27 // A FileSystem object that uses Dirmap to redirect reads. 28 // FileSystem is read via the internal impl. 29 class HostFileSystem : public FileSystemImpl { 30 public: 31 // Use FileSystemImpl for any actual reads. 32 HostFileSystem(const Dirmap& dirmap, status_t missingError); 33 // Use |impl| for any actual reads. Does not own impl. 34 HostFileSystem(const Dirmap& dirmap, status_t missingError, FileSystem* impl); 35 // Use |impl| for any actual reads. Owns impl. 36 HostFileSystem(const Dirmap& dirmap, status_t missingError, std::unique_ptr<FileSystem>&& impl); 37 38 status_t fetch(const std::string& path, std::string* fetched, 39 std::string* error) const override; 40 status_t listFiles(const std::string& path, std::vector<std::string>* out, 41 std::string* error) const override; 42 status_t modifiedTime(const std::string& path, int64_t* mtime, 43 std::string* error) const override; 44 45 private: 46 std::string resolve(const std::string& path, std::string* error) const; 47 48 Dirmap mDirMap; 49 status_t mMissingError; 50 51 std::unique_ptr<FileSystem> mImplUniq; 52 FileSystem* mImpl; 53 }; 54 55 } // namespace android::vintf::details 56