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 #include <vector> 14 15 #include <brillo/brillo_export.h> 16 #include <brillo/key_value_store.h> 17 #include <gtest/gtest_prod.h> 18 19 namespace brillo { 20 21 class BRILLO_EXPORT OsReleaseReader final { 22 public: 23 // Create an empty reader 24 OsReleaseReader() = default; 25 26 // Loads the key=value pairs from either /etc/os-release.d/<KEY> or 27 // /etc/os-release. 28 void Load(); 29 30 // Same as the private Load method. 31 // This need to be public so that services can use it in testing mode (for 32 // autotest tests for example). 33 // This should not be used in production so suffix it with TestingOnly to 34 // make it obvious. 35 void LoadTestingOnly(const base::FilePath& root_dir); 36 37 // Getter for the given key. Returns whether the key was found on the store. 38 bool GetString(const std::string& key, std::string* value) const; 39 40 // Getter for all the keys in /etc/os-release. 41 std::vector<std::string> GetKeys() const; 42 43 private: 44 // The map storing all the key-value pairs. 45 KeyValueStore store_; 46 47 // os-release can be lazily loaded if need be. 48 bool initialized_; 49 50 // Load the data from a given root_dir. 51 BRILLO_PRIVATE void Load(const base::FilePath& root_dir); 52 53 DISALLOW_COPY_AND_ASSIGN(OsReleaseReader); 54 }; 55 56 } // namespace brillo 57 58 #endif // LIBBRILLO_BRILLO_OSRELEASE_READER_H_ 59