Add derive_sdk binary for reading sdk protos (a82f161d) · Commits · e / os / android_frameworks_base

apex/sdkext/Android.bp

+9 −0

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		@@ -15,7 +15,9 @@
		apex {
		name: "com.android.sdkext",
		manifest: "manifest.json",
		binaries: [ "derive_sdk" ],
		java_libs: [ "framework-sdkext" ],
		prebuilts: [ "com.android.sdkext.ldconfig" ],
		key: "com.android.sdkext.key",
		certificate: ":com.android.sdkext.certificate",
		}
		@@ -30,3 +32,10 @@ android_app_certificate {
		name: "com.android.sdkext.certificate",
		certificate: "com.android.sdkext",
		}

		prebuilt_etc {
		name: "com.android.sdkext.ldconfig",
		src: "ld.config.txt",
		filename: "ld.config.txt",
		installable: false,
		}

apex/sdkext/derive_sdk/Android.bp

0 → 100644

+31 −0

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		// Copyright (C) 2019 The Android Open Source Project
		//
		// 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.

		cc_binary {
		name: "derive_sdk",
		srcs: [
		"derive_sdk.cpp",
		"sdk.proto",
		],
		proto: {
		type: "lite",
		},
		sdk_version: "current",
		stl: "c++_static",
		shared_libs: [ "liblog" ],
		static_libs: [
		"libbase_ndk",
		"libprotobuf-cpp-lite-ndk",
		],
		}

apex/sdkext/derive_sdk/derive_sdk.cpp

0 → 100644

+77 −0

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		/*
		* Copyright (C) 2019 The Android Open Source Project
		*
		* 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.
		*/

		#define LOG_TAG "derive_sdk"

		#include <algorithm>
		#include <dirent.h>
		#include <iostream>
		#include <sys/stat.h>
		#include <vector>

		#include <android-base/file.h>
		#include <android-base/logging.h>
		#include <android-base/properties.h>

		#include "frameworks/base/apex/sdkext/derive_sdk/sdk.pb.h"

		using com::android::sdkext::proto::SdkVersion;

		int main(int, char**) {
		std::unique_ptr<DIR, decltype(&closedir)> apex(opendir("/apex"), closedir);
		if (!apex) {
		LOG(ERROR) << "Could not read /apex";
		return EXIT_FAILURE;
		}
		struct dirent* de;
		std::vector<std::string> paths;
		while ((de = readdir(apex.get()))) {
		std::string name = de->d_name;
		if (name[0] == '.' \|\| name.find('@') != std::string::npos) {
		// Skip <name>@<ver> dirs, as they are bind-mounted to <name>
		continue;
		}
		std::string path = "/apex/" + name + "/etc/sdkinfo.binarypb";
		struct stat statbuf;
		if (stat(path.c_str(), &statbuf) == 0) {
		paths.push_back(path);
		}
		}

		std::vector<int> versions;
		for (const auto& path : paths) {
		std::string contents;
		if (!android::base::ReadFileToString(path, &contents, true)) {
		LOG(ERROR) << "failed to read " << path;
		continue;
		}
		SdkVersion sdk_version;
		if (!sdk_version.ParseFromString(contents)) {
		LOG(ERROR) << "failed to parse " << path;
		continue;
		}
		versions.push_back(sdk_version.version());
		}
		auto itr = std::min_element(versions.begin(), versions.end());
		std::string prop_value = itr == versions.end() ? "0" : std::to_string(*itr);

		if (!android::base::SetProperty("persist.com.android.sdkext.sdk_info", prop_value)) {
		LOG(ERROR) << "failed to set sdk_info prop";
		return EXIT_FAILURE;
		}

		return EXIT_SUCCESS;
		}

apex/sdkext/derive_sdk/sdk.proto

0 → 100644

+25 −0

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		/*
		* Copyright (C) 2019 The Android Open Source Project
		*
		* 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.
		*/

		syntax = "proto3";
		package com.android.sdkext.proto;

		option java_outer_classname = "SdkProto";
		option optimize_for = LITE_RUNTIME;

		message SdkVersion {
		int32 version = 1;
		}

apex/sdkext/ld.config.txt

0 → 100644

+31 −0

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		# Copyright (C) 2019 The Android Open Source Project
		#
		# Bionic loader config file for the sdkext apex.

		dir.sdkext = /apex/com.android.sdkext/bin/

		[sdkext]
		additional.namespaces = platform

		namespace.default.isolated = true
		namespace.default.links = platform
		namespace.default.link.platform.allow_all_shared_libs = true

		###############################################################################
		# "platform" namespace: used for NDK libraries
		###############################################################################
		namespace.platform.isolated = true
		namespace.platform.search.paths = /system/${LIB}
		namespace.platform.asan.search.paths = /data/asan/system/${LIB}

		# /system/lib/libc.so, etc are symlinks to /apex/com.android.lib/lib/bionic/libc.so, etc.
		# Add /apex/... path to the permitted paths because linker uses realpath(3)
		# to check the accessibility of the lib. We could add this to search.paths
		# instead but that makes the resolution of bionic libs be dependent on
		# the order of /system/lib and /apex/... in search.paths. If /apex/...
		# is after /system/lib, then /apex/... is never tried because libc.so
		# is always found in /system/lib but fails to pass the accessibility test
		# because of its realpath. It's better to not depend on the ordering if
		# possible.
		namespace.platform.permitted.paths = /apex/com.android.runtime/${LIB}/bionic
		namespace.platform.asan.permitted.paths = /apex/com.android.runtime/${LIB}/bionic