/** * Copyright © 2020 IBM Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "config.h" #include "util.hpp" namespace phosphor::logging::util { std::optional<std::string> getOSReleaseValue(const std::string& key) { std::ifstream versionFile{BMC_VERSION_FILE}; std::string line; std::string keyPattern{key + '='}; while (std::getline(versionFile, line)) { if (line.substr(0, keyPattern.size()).find(keyPattern) != std::string::npos) { // If the value isn't surrounded by quotes, then pos will be // npos + 1 = 0, and the 2nd arg to substr() will be npos // which means get the rest of the string. auto value = line.substr(keyPattern.size()); std::size_t pos = value.find_first_of('"') + 1; return value.substr(pos, value.find_last_of('"') - pos); } } return std::nullopt; } } // namespace phosphor::logging::util