| /** |
| * Copyright © 2016 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 <cstdlib> |
| #include <memory> |
| #include "sysfs.hpp" |
| #include "util.hpp" |
| #include "directory.hpp" |
| |
| std::string findHwmon(const std::string& ofNode) |
| { |
| static constexpr auto hwmonRoot = "/sys/class/hwmon"; |
| |
| std::string fullOfPath{"/sys/firmware/devicetree/base"}; |
| fullOfPath.append(ofNode); |
| |
| std::string hwmonInst; |
| Directory d(hwmonRoot); |
| |
| while (d.next(hwmonInst)) |
| { |
| std::string hwmonPath{hwmonRoot}; |
| hwmonPath.append(1, '/'); |
| hwmonPath.append(hwmonInst); |
| std::string path{hwmonPath}; |
| path.append(1, '/'); |
| path.append("of_node"); |
| |
| auto real = std::unique_ptr<char, phosphor::utility::Free<char>>(realpath( |
| path.c_str(), nullptr)); |
| if (!real || real.get() != fullOfPath) |
| { |
| continue; |
| } |
| |
| return hwmonPath; |
| } |
| |
| return std::string(); |
| } |
| |
| // vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4 |