1 // Copyright 2014 The Chromium OS Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Wrapper around /etc/os-release and /etc/os-release.d. 6 // Standard fields can come from both places depending on how we set them. They 7 // should always be accessed through this interface. 8 9 #ifndef LIBBRILLO_BRILLO_OSRELEASE_READER_H_ 10 #define LIBBRILLO_BRILLO_OSRELEASE_READER_H_ 11 12 #include <string> 13 14 #include <brillo/brillo_export.h> 15 #include <brillo/key_value_store.h> 16 #include <gtest/gtest_prod.h> 17 18 namespace brillo { 19 20 class BRILLO_EXPORT OsReleaseReader final { 21 public: 22 // Create an empty reader 23 OsReleaseReader() = default; 24 25 // Loads the key=value pairs from either /etc/os-release.d/<KEY> or 26 // /etc/os-release. 27 void Load(); 28 29 // Same as the private Load method. 30 // This need to be public so that services can use it in testing mode (for 31 // autotest tests for example). 32 // This should not be used in production so suffix it with TestingOnly to 33 // make it obvious. 34 void LoadTestingOnly(const base::FilePath& root_dir); 35 36 // Getter for the given key. Returns whether the key was found on the store. 37 bool GetString(const std::string& key, std::string* value) const; 38 39 private: 40 // The map storing all the key-value pairs. 41 KeyValueStore store_; 42 43 // os-release can be lazily loaded if need be. 44 bool initialized_; 45 46 // Load the data from a given root_dir. 47 BRILLO_PRIVATE void Load(const base::FilePath& root_dir); 48 49 DISALLOW_COPY_AND_ASSIGN(OsReleaseReader); 50 }; 51 52 } // namespace brillo 53 54 #endif // LIBBRILLO_BRILLO_OSRELEASE_READER_H_ 55