1 // Copyright 2020 The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #pragma once 16 17 #include "aemu/base/Optional.h" 18 19 #include <string> 20 21 namespace android { 22 23 // Reads from |fd| into |file_contents| 24 // Returns false if something went wrong 25 bool readFileIntoString(int fd, std::string* file_contents); 26 27 // Reads |name| file 28 base::Optional<std::string> readFileIntoString(const std::string& filename); 29 30 // Writes |file_contents| to |fd| 31 // Returns false if something went wrong 32 bool writeStringToFile(int fd, const std::string& file_contents); 33 34 // Sets the file size to |size|, could either extend or truncate it. 35 bool setFileSize(int fd, int64_t size); 36 37 } // namespace android 38