Anton Hansson | da4972f | 2020-01-08 09:48:18 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2019 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "derive_sdk" |
| 18 | |
| 19 | #include <algorithm> |
| 20 | #include <dirent.h> |
| 21 | #include <iostream> |
| 22 | #include <sys/stat.h> |
| 23 | #include <vector> |
| 24 | |
| 25 | #include <android-base/file.h> |
| 26 | #include <android-base/logging.h> |
| 27 | #include <android-base/properties.h> |
| 28 | |
| 29 | #include "frameworks/base/apex/sdkextensions/derive_sdk/sdk.pb.h" |
| 30 | |
| 31 | using com::android::sdkext::proto::SdkVersion; |
| 32 | |
| 33 | int main(int, char**) { |
| 34 | std::unique_ptr<DIR, decltype(&closedir)> apex(opendir("/apex"), closedir); |
| 35 | if (!apex) { |
| 36 | LOG(ERROR) << "Could not read /apex"; |
| 37 | return EXIT_FAILURE; |
| 38 | } |
| 39 | struct dirent* de; |
| 40 | std::vector<std::string> paths; |
| 41 | while ((de = readdir(apex.get()))) { |
| 42 | std::string name = de->d_name; |
| 43 | if (name[0] == '.' || name.find('@') != std::string::npos) { |
| 44 | // Skip <name>@<ver> dirs, as they are bind-mounted to <name> |
| 45 | continue; |
| 46 | } |
| 47 | std::string path = "/apex/" + name + "/etc/sdkinfo.binarypb"; |
| 48 | struct stat statbuf; |
| 49 | if (stat(path.c_str(), &statbuf) == 0) { |
| 50 | paths.push_back(path); |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | std::vector<int> versions; |
| 55 | for (const auto& path : paths) { |
| 56 | std::string contents; |
| 57 | if (!android::base::ReadFileToString(path, &contents, true)) { |
| 58 | LOG(ERROR) << "failed to read " << path; |
| 59 | continue; |
| 60 | } |
| 61 | SdkVersion sdk_version; |
| 62 | if (!sdk_version.ParseFromString(contents)) { |
| 63 | LOG(ERROR) << "failed to parse " << path; |
| 64 | continue; |
| 65 | } |
| 66 | LOG(INFO) << "Read version " << sdk_version.version() << " from " << path; |
| 67 | versions.push_back(sdk_version.version()); |
| 68 | } |
| 69 | auto itr = std::min_element(versions.begin(), versions.end()); |
| 70 | std::string prop_value = itr == versions.end() ? "0" : std::to_string(*itr); |
| 71 | |
| 72 | if (!android::base::SetProperty("ro.build.version.extensions.r", prop_value)) { |
| 73 | LOG(ERROR) << "failed to set sdk_info prop"; |
| 74 | return EXIT_FAILURE; |
| 75 | } |
| 76 | |
| 77 | LOG(INFO) << "R extension version is " << prop_value; |
| 78 | return EXIT_SUCCESS; |
| 79 | } |