cb0f9bbc85
One of the major aspects of treble is the compartmentalization of system and vendor components, however init leaves a huge gap here, as vendor init scripts run in the same context as system init scripts and thus can access and modify the same properties, files, etc as the system can. This change is meant to close that gap. It forks a separate 'subcontext' init that runs in a different SELinux context with permissions that match what vendors should have access to. Commands get sent over a socket to this 'subcontext' init that then runs them in this SELinux context and returns the result. Note that not all commands run in the subcontext; some commands such as those dealing with services only make sense in the context of the main init process. Bug: 62875318 Test: init unit tests, boot bullhead, boot sailfish Change-Id: Idf4a4ebf98842d27b8627f901f961ab9eb412aee
212 lines
5 KiB
Text
212 lines
5 KiB
Text
//
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// Copyright (C) 2017 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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cc_defaults {
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name: "init_defaults",
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cpp_std: "experimental",
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sanitize: {
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misc_undefined: ["signed-integer-overflow"],
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},
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cppflags: [
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"-DLOG_UEVENTS=0",
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"-Wall",
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"-Wextra",
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"-Wno-unused-parameter",
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"-Werror",
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"-DALLOW_LOCAL_PROP_OVERRIDE=0",
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"-DALLOW_PERMISSIVE_SELINUX=0",
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"-DREBOOT_BOOTLOADER_ON_PANIC=0",
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"-DWORLD_WRITABLE_KMSG=0",
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"-DDUMP_ON_UMOUNT_FAILURE=0",
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"-DSHUTDOWN_ZERO_TIMEOUT=0",
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],
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product_variables: {
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debuggable: {
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cppflags: [
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"-UALLOW_LOCAL_PROP_OVERRIDE",
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"-DALLOW_LOCAL_PROP_OVERRIDE=1",
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"-UALLOW_PERMISSIVE_SELINUX",
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"-DALLOW_PERMISSIVE_SELINUX=1",
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"-UREBOOT_BOOTLOADER_ON_PANIC",
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"-DREBOOT_BOOTLOADER_ON_PANIC=1",
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"-UWORLD_WRITABLE_KMSG",
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"-DWORLD_WRITABLE_KMSG=1",
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"-UDUMP_ON_UMOUNT_FAILURE",
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"-DDUMP_ON_UMOUNT_FAILURE=1",
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],
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},
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eng: {
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cppflags: [
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"-USHUTDOWN_ZERO_TIMEOUT",
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"-DSHUTDOWN_ZERO_TIMEOUT=1",
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],
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},
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uml: {
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cppflags: ["-DUSER_MODE_LINUX"],
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}
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},
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}
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cc_library_static {
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name: "libinit",
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defaults: ["init_defaults"],
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srcs: [
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"action.cpp",
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"capabilities.cpp",
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"descriptors.cpp",
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"devices.cpp",
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"firmware_handler.cpp",
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"import_parser.cpp",
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"log.cpp",
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"parser.cpp",
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"persistent_properties.cpp",
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"persistent_properties.proto",
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"property_service.cpp",
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"security.cpp",
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"selinux.cpp",
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"service.cpp",
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"subcontext.cpp",
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"subcontext.proto",
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"rlimit_parser.cpp",
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"tokenizer.cpp",
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"uevent_listener.cpp",
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"ueventd_parser.cpp",
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"util.cpp",
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],
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whole_static_libs: ["libcap"],
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static_libs: [
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"libbase",
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"libselinux",
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"liblog",
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"libprocessgroup",
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"libfs_mgr",
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"libprotobuf-cpp-lite",
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],
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include_dirs: [
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"system/core/mkbootimg",
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],
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proto: {
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type: "lite",
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export_proto_headers: true,
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},
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}
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/*
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This is not yet ready, see the below TODOs for what is missing
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cc_binary {
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// TODO: Missing,
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//LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)
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//LOCAL_UNSTRIPPED_PATH := $(TARGET_ROOT_OUT_UNSTRIPPED)
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name: "init",
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defaults: ["init_defaults"],
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required: [
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"e2fsdroid",
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"mke2fs",
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],
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static_executable: true,
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srcs: [
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"bootchart.cpp",
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"builtins.cpp",
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"init.cpp",
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"init_first_stage.cpp",
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"keychords.cpp",
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"reboot.cpp",
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"sigchld_handler.cpp",
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"ueventd.cpp",
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"watchdogd.cpp",
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],
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static_libs: [
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"libinit",
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"libbootloader_message",
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"libfs_mgr",
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"libfec",
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"libfec_rs",
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"libsquashfs_utils",
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"liblogwrap",
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"libext4_utils",
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"libcutils",
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"libbase",
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"libc",
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"libselinux",
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"liblog",
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"libcrypto_utils",
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"libcrypto",
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"libc++_static",
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"libdl",
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"libsparse",
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"libz",
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"libprocessgroup",
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"libavb",
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"libkeyutils",
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],
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symlinks: [
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"sbin/ueventd",
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"sbin/watchdogd",
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],
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}
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*/
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// Tests
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// ------------------------------------------------------------------------------
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cc_test {
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name: "init_tests",
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defaults: ["init_defaults"],
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srcs: [
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"devices_test.cpp",
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"init_test.cpp",
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"persistent_properties_test.cpp",
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"property_service_test.cpp",
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"result_test.cpp",
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"rlimit_parser_test.cpp",
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"service_test.cpp",
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"subcontext_test.cpp",
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"ueventd_test.cpp",
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"util_test.cpp",
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],
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shared_libs: [
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"libbase",
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"libcutils",
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],
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static_libs: [
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"libinit",
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"libselinux",
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"libcrypto",
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"libprotobuf-cpp-lite",
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],
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}
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cc_benchmark {
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name: "init_benchmarks",
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defaults: ["init_defaults"],
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srcs: [
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"subcontext_benchmark.cpp",
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],
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shared_libs: [
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"libbase",
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"libcutils",
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],
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static_libs: [
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"libinit",
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"libselinux",
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"libcrypto",
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"libprotobuf-cpp-lite",
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],
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}
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subdirs = ["*"]
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