a82f161d33
Put the lowest seen number in a persist sysprop. Bug: 137191822 Test: manual ran derive_sdk on device with fake protos installed Change-Id: Ic73d615d9d60769d237aa5a72dae2dfe56463007
78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "derive_sdk"
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#include <algorithm>
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#include <dirent.h>
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#include <iostream>
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#include <sys/stat.h>
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#include <vector>
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#include <android-base/file.h>
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#include <android-base/logging.h>
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#include <android-base/properties.h>
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#include "frameworks/base/apex/sdkext/derive_sdk/sdk.pb.h"
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using com::android::sdkext::proto::SdkVersion;
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int main(int, char**) {
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std::unique_ptr<DIR, decltype(&closedir)> apex(opendir("/apex"), closedir);
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if (!apex) {
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LOG(ERROR) << "Could not read /apex";
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return EXIT_FAILURE;
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}
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struct dirent* de;
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std::vector<std::string> paths;
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while ((de = readdir(apex.get()))) {
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std::string name = de->d_name;
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if (name[0] == '.' || name.find('@') != std::string::npos) {
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// Skip <name>@<ver> dirs, as they are bind-mounted to <name>
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continue;
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}
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std::string path = "/apex/" + name + "/etc/sdkinfo.binarypb";
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struct stat statbuf;
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if (stat(path.c_str(), &statbuf) == 0) {
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paths.push_back(path);
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}
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}
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std::vector<int> versions;
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for (const auto& path : paths) {
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std::string contents;
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if (!android::base::ReadFileToString(path, &contents, true)) {
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LOG(ERROR) << "failed to read " << path;
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continue;
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}
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SdkVersion sdk_version;
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if (!sdk_version.ParseFromString(contents)) {
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LOG(ERROR) << "failed to parse " << path;
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continue;
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}
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versions.push_back(sdk_version.version());
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}
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auto itr = std::min_element(versions.begin(), versions.end());
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std::string prop_value = itr == versions.end() ? "0" : std::to_string(*itr);
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if (!android::base::SetProperty("persist.com.android.sdkext.sdk_info", prop_value)) {
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LOG(ERROR) << "failed to set sdk_info prop";
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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