1069 lines
37 KiB
C++
1069 lines
37 KiB
C++
/*
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* Copyright (C) 2008 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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#include "builtins.h"
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fts.h>
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#include <linux/loop.h>
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#include <linux/module.h>
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#include <mntent.h>
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#include <net/if.h>
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#include <sched.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mount.h>
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#include <sys/resource.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/syscall.h>
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#include <sys/system_properties.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <android-base/chrono_utils.h>
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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/parseint.h>
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#include <android-base/properties.h>
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#include <android-base/stringprintf.h>
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#include <android-base/strings.h>
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#include <android-base/unique_fd.h>
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#include <bootloader_message/bootloader_message.h>
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#include <cutils/android_reboot.h>
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#include <ext4_utils/ext4_crypt.h>
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#include <ext4_utils/ext4_crypt_init_extensions.h>
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#include <fs_mgr.h>
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#include <selinux/android.h>
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#include <selinux/label.h>
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#include <selinux/selinux.h>
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#include <system/thread_defs.h>
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#include "action_manager.h"
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#include "bootchart.h"
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#include "init.h"
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#include "parser.h"
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#include "property_service.h"
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#include "reboot.h"
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#include "rlimit_parser.h"
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#include "selinux.h"
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#include "service.h"
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#include "subcontext.h"
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#include "util.h"
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using namespace std::literals::string_literals;
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using android::base::unique_fd;
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#define chmod DO_NOT_USE_CHMOD_USE_FCHMODAT_SYMLINK_NOFOLLOW
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namespace android {
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namespace init {
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static constexpr std::chrono::nanoseconds kCommandRetryTimeout = 5s;
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static Result<Success> reboot_into_recovery(const std::vector<std::string>& options) {
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std::string err;
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if (!write_bootloader_message(options, &err)) {
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return Error() << "Failed to set bootloader message: " << err;
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}
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property_set("sys.powerctl", "reboot,recovery");
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return Success();
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}
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template <typename F>
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static void ForEachServiceInClass(const std::string& classname, F function) {
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for (const auto& service : ServiceList::GetInstance()) {
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if (service->classnames().count(classname)) std::invoke(function, service);
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}
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}
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static Result<Success> do_class_start(const BuiltinArguments& args) {
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// Starting a class does not start services which are explicitly disabled.
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// They must be started individually.
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for (const auto& service : ServiceList::GetInstance()) {
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if (service->classnames().count(args[1])) {
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if (auto result = service->StartIfNotDisabled(); !result) {
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LOG(ERROR) << "Could not start service '" << service->name()
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<< "' as part of class '" << args[1] << "': " << result.error();
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}
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}
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}
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return Success();
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}
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static Result<Success> do_class_stop(const BuiltinArguments& args) {
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ForEachServiceInClass(args[1], &Service::Stop);
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return Success();
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}
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static Result<Success> do_class_reset(const BuiltinArguments& args) {
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ForEachServiceInClass(args[1], &Service::Reset);
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return Success();
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}
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static Result<Success> do_class_restart(const BuiltinArguments& args) {
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ForEachServiceInClass(args[1], &Service::Restart);
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return Success();
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}
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static Result<Success> do_domainname(const BuiltinArguments& args) {
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if (auto result = WriteFile("/proc/sys/kernel/domainname", args[1]); !result) {
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return Error() << "Unable to write to /proc/sys/kernel/domainname: " << result.error();
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}
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return Success();
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}
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static Result<Success> do_enable(const BuiltinArguments& args) {
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Service* svc = ServiceList::GetInstance().FindService(args[1]);
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if (!svc) return Error() << "Could not find service";
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if (auto result = svc->Enable(); !result) {
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return Error() << "Could not enable service: " << result.error();
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}
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return Success();
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}
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static Result<Success> do_exec(const BuiltinArguments& args) {
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auto service = Service::MakeTemporaryOneshotService(args.args);
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if (!service) {
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return Error() << "Could not create exec service";
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}
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if (auto result = service->ExecStart(); !result) {
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return Error() << "Could not start exec service: " << result.error();
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}
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ServiceList::GetInstance().AddService(std::move(service));
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return Success();
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}
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static Result<Success> do_exec_background(const BuiltinArguments& args) {
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auto service = Service::MakeTemporaryOneshotService(args.args);
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if (!service) {
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return Error() << "Could not create exec background service";
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}
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if (auto result = service->Start(); !result) {
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return Error() << "Could not start exec background service: " << result.error();
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}
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ServiceList::GetInstance().AddService(std::move(service));
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return Success();
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}
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static Result<Success> do_exec_start(const BuiltinArguments& args) {
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Service* service = ServiceList::GetInstance().FindService(args[1]);
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if (!service) {
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return Error() << "Service not found";
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}
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if (auto result = service->ExecStart(); !result) {
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return Error() << "Could not start exec service: " << result.error();
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}
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return Success();
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}
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static Result<Success> do_export(const BuiltinArguments& args) {
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if (setenv(args[1].c_str(), args[2].c_str(), 1) == -1) {
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return ErrnoError() << "setenv() failed";
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}
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return Success();
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}
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static Result<Success> do_hostname(const BuiltinArguments& args) {
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if (auto result = WriteFile("/proc/sys/kernel/hostname", args[1]); !result) {
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return Error() << "Unable to write to /proc/sys/kernel/hostname: " << result.error();
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}
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return Success();
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}
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static Result<Success> do_ifup(const BuiltinArguments& args) {
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struct ifreq ifr;
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strlcpy(ifr.ifr_name, args[1].c_str(), IFNAMSIZ);
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unique_fd s(TEMP_FAILURE_RETRY(socket(AF_INET, SOCK_DGRAM, 0)));
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if (s < 0) return ErrnoError() << "opening socket failed";
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if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
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return ErrnoError() << "ioctl(..., SIOCGIFFLAGS, ...) failed";
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}
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ifr.ifr_flags |= IFF_UP;
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if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
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return ErrnoError() << "ioctl(..., SIOCSIFFLAGS, ...) failed";
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}
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return Success();
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}
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static Result<Success> do_insmod(const BuiltinArguments& args) {
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int flags = 0;
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auto it = args.begin() + 1;
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if (!(*it).compare("-f")) {
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flags = MODULE_INIT_IGNORE_VERMAGIC | MODULE_INIT_IGNORE_MODVERSIONS;
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it++;
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}
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std::string filename = *it++;
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std::string options = android::base::Join(std::vector<std::string>(it, args.end()), ' ');
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unique_fd fd(TEMP_FAILURE_RETRY(open(filename.c_str(), O_RDONLY | O_NOFOLLOW | O_CLOEXEC)));
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if (fd == -1) return ErrnoError() << "open(\"" << filename << "\") failed";
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int rc = syscall(__NR_finit_module, fd.get(), options.c_str(), flags);
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if (rc == -1) return ErrnoError() << "finit_module for \"" << filename << "\" failed";
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return Success();
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}
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// mkdir <path> [mode] [owner] [group]
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static Result<Success> do_mkdir(const BuiltinArguments& args) {
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mode_t mode = 0755;
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if (args.size() >= 3) {
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mode = std::strtoul(args[2].c_str(), 0, 8);
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}
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if (!make_dir(args[1], mode)) {
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/* chmod in case the directory already exists */
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if (errno == EEXIST) {
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if (fchmodat(AT_FDCWD, args[1].c_str(), mode, AT_SYMLINK_NOFOLLOW) == -1) {
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return ErrnoError() << "fchmodat() failed";
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}
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} else {
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return ErrnoError() << "mkdir() failed";
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}
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}
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if (args.size() >= 4) {
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auto uid = DecodeUid(args[3]);
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if (!uid) {
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return Error() << "Unable to decode UID for '" << args[3] << "': " << uid.error();
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}
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Result<gid_t> gid = -1;
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if (args.size() == 5) {
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gid = DecodeUid(args[4]);
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if (!gid) {
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return Error() << "Unable to decode GID for '" << args[3] << "': " << gid.error();
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}
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}
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if (lchown(args[1].c_str(), *uid, *gid) == -1) {
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return ErrnoError() << "lchown failed";
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}
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/* chown may have cleared S_ISUID and S_ISGID, chmod again */
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if (mode & (S_ISUID | S_ISGID)) {
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if (fchmodat(AT_FDCWD, args[1].c_str(), mode, AT_SYMLINK_NOFOLLOW) == -1) {
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return ErrnoError() << "fchmodat failed";
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}
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}
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}
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if (e4crypt_is_native()) {
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if (e4crypt_set_directory_policy(args[1].c_str())) {
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const std::vector<std::string> options = {
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"--prompt_and_wipe_data",
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"--reason=set_policy_failed:"s + args[1]};
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reboot_into_recovery(options);
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return Success();
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}
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}
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return Success();
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}
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/* umount <path> */
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static Result<Success> do_umount(const BuiltinArguments& args) {
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if (umount(args[1].c_str()) < 0) {
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return ErrnoError() << "umount() failed";
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}
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return Success();
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}
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static struct {
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const char *name;
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unsigned flag;
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} mount_flags[] = {
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{ "noatime", MS_NOATIME },
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{ "noexec", MS_NOEXEC },
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{ "nosuid", MS_NOSUID },
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{ "nodev", MS_NODEV },
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{ "nodiratime", MS_NODIRATIME },
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{ "ro", MS_RDONLY },
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{ "rw", 0 },
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{ "remount", MS_REMOUNT },
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{ "bind", MS_BIND },
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{ "rec", MS_REC },
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{ "unbindable", MS_UNBINDABLE },
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{ "private", MS_PRIVATE },
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{ "slave", MS_SLAVE },
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{ "shared", MS_SHARED },
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{ "defaults", 0 },
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{ 0, 0 },
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};
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#define DATA_MNT_POINT "/data"
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/* mount <type> <device> <path> <flags ...> <options> */
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static Result<Success> do_mount(const BuiltinArguments& args) {
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const char* options = nullptr;
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unsigned flags = 0;
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bool wait = false;
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for (size_t na = 4; na < args.size(); na++) {
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size_t i;
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for (i = 0; mount_flags[i].name; i++) {
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if (!args[na].compare(mount_flags[i].name)) {
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flags |= mount_flags[i].flag;
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break;
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}
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}
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if (!mount_flags[i].name) {
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if (!args[na].compare("wait")) {
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wait = true;
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// If our last argument isn't a flag, wolf it up as an option string.
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} else if (na + 1 == args.size()) {
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options = args[na].c_str();
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}
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}
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}
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const char* system = args[1].c_str();
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const char* source = args[2].c_str();
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const char* target = args[3].c_str();
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if (android::base::StartsWith(source, "loop@")) {
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int mode = (flags & MS_RDONLY) ? O_RDONLY : O_RDWR;
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unique_fd fd(TEMP_FAILURE_RETRY(open(source + 5, mode | O_CLOEXEC)));
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if (fd < 0) return ErrnoError() << "open(" << source + 5 << ", " << mode << ") failed";
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for (size_t n = 0;; n++) {
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std::string tmp = android::base::StringPrintf("/dev/block/loop%zu", n);
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unique_fd loop(TEMP_FAILURE_RETRY(open(tmp.c_str(), mode | O_CLOEXEC)));
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if (loop < 0) return ErrnoError() << "open(" << tmp << ", " << mode << ") failed";
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loop_info info;
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/* if it is a blank loop device */
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if (ioctl(loop, LOOP_GET_STATUS, &info) < 0 && errno == ENXIO) {
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/* if it becomes our loop device */
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if (ioctl(loop, LOOP_SET_FD, fd.get()) >= 0) {
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if (mount(tmp.c_str(), target, system, flags, options) < 0) {
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ioctl(loop, LOOP_CLR_FD, 0);
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return ErrnoError() << "mount() failed";
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}
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return Success();
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}
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}
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}
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return Error() << "out of loopback devices";
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} else {
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if (wait)
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wait_for_file(source, kCommandRetryTimeout);
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if (mount(source, target, system, flags, options) < 0) {
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return ErrnoError() << "mount() failed";
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}
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}
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return Success();
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}
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/* Imports .rc files from the specified paths. Default ones are applied if none is given.
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*
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* start_index: index of the first path in the args list
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*/
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static void import_late(const std::vector<std::string>& args, size_t start_index, size_t end_index) {
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auto& action_manager = ActionManager::GetInstance();
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auto& service_list = ServiceList::GetInstance();
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Parser parser = CreateParser(action_manager, service_list);
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if (end_index <= start_index) {
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// Fallbacks for partitions on which early mount isn't enabled.
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for (const auto& path : late_import_paths) {
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parser.ParseConfig(path);
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}
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late_import_paths.clear();
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} else {
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for (size_t i = start_index; i < end_index; ++i) {
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parser.ParseConfig(args[i]);
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}
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}
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// Turning this on and letting the INFO logging be discarded adds 0.2s to
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// Nexus 9 boot time, so it's disabled by default.
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if (false) DumpState();
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}
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/* mount_fstab
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*
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* Call fs_mgr_mount_all() to mount the given fstab
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*/
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static Result<int> mount_fstab(const char* fstabfile, int mount_mode) {
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/*
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* Call fs_mgr_mount_all() to mount all filesystems. We fork(2) and
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* do the call in the child to provide protection to the main init
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* process if anything goes wrong (crash or memory leak), and wait for
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* the child to finish in the parent.
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*/
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pid_t pid = fork();
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if (pid > 0) {
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/* Parent. Wait for the child to return */
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int status;
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int wp_ret = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
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if (wp_ret == -1) {
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// Unexpected error code. We will continue anyway.
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PLOG(WARNING) << "waitpid failed";
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}
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if (WIFEXITED(status)) {
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return WEXITSTATUS(status);
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} else {
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return Error() << "child aborted";
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}
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} else if (pid == 0) {
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/* child, call fs_mgr_mount_all() */
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// So we can always see what fs_mgr_mount_all() does.
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// Only needed if someone explicitly changes the default log level in their init.rc.
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android::base::ScopedLogSeverity info(android::base::INFO);
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struct fstab* fstab = fs_mgr_read_fstab(fstabfile);
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int child_ret = fs_mgr_mount_all(fstab, mount_mode);
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fs_mgr_free_fstab(fstab);
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if (child_ret == -1) {
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PLOG(ERROR) << "fs_mgr_mount_all returned an error";
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}
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_exit(child_ret);
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} else {
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return Error() << "fork() failed";
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}
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}
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/* Queue event based on fs_mgr return code.
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*
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* code: return code of fs_mgr_mount_all
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*
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* This function might request a reboot, in which case it will
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* not return.
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*
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* return code is processed based on input code
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*/
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static Result<Success> queue_fs_event(int code) {
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if (code == FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION) {
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ActionManager::GetInstance().QueueEventTrigger("encrypt");
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return Success();
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} else if (code == FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED) {
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property_set("ro.crypto.state", "encrypted");
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property_set("ro.crypto.type", "block");
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ActionManager::GetInstance().QueueEventTrigger("defaultcrypto");
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return Success();
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} else if (code == FS_MGR_MNTALL_DEV_NOT_ENCRYPTED) {
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property_set("ro.crypto.state", "unencrypted");
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ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
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return Success();
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} else if (code == FS_MGR_MNTALL_DEV_NOT_ENCRYPTABLE) {
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|
property_set("ro.crypto.state", "unsupported");
|
|
ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
|
|
return Success();
|
|
} else if (code == FS_MGR_MNTALL_DEV_NEEDS_RECOVERY) {
|
|
/* Setup a wipe via recovery, and reboot into recovery */
|
|
PLOG(ERROR) << "fs_mgr_mount_all suggested recovery, so wiping data via recovery.";
|
|
const std::vector<std::string> options = {"--wipe_data", "--reason=fs_mgr_mount_all" };
|
|
reboot_into_recovery(options);
|
|
return Success();
|
|
/* If reboot worked, there is no return. */
|
|
} else if (code == FS_MGR_MNTALL_DEV_FILE_ENCRYPTED) {
|
|
if (e4crypt_install_keyring()) {
|
|
return Error() << "e4crypt_install_keyring() failed";
|
|
}
|
|
property_set("ro.crypto.state", "encrypted");
|
|
property_set("ro.crypto.type", "file");
|
|
|
|
// Although encrypted, we have device key, so we do not need to
|
|
// do anything different from the nonencrypted case.
|
|
ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
|
|
return Success();
|
|
} else if (code == FS_MGR_MNTALL_DEV_IS_METADATA_ENCRYPTED) {
|
|
if (e4crypt_install_keyring()) {
|
|
return Error() << "e4crypt_install_keyring() failed";
|
|
}
|
|
property_set("ro.crypto.state", "encrypted");
|
|
property_set("ro.crypto.type", "file");
|
|
|
|
// Although encrypted, vold has already set the device up, so we do not need to
|
|
// do anything different from the nonencrypted case.
|
|
ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
|
|
return Success();
|
|
} else if (code == FS_MGR_MNTALL_DEV_NEEDS_METADATA_ENCRYPTION) {
|
|
if (e4crypt_install_keyring()) {
|
|
return Error() << "e4crypt_install_keyring() failed";
|
|
}
|
|
property_set("ro.crypto.type", "file");
|
|
|
|
// Although encrypted, vold has already set the device up, so we do not need to
|
|
// do anything different from the nonencrypted case.
|
|
ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
|
|
return Success();
|
|
} else if (code > 0) {
|
|
Error() << "fs_mgr_mount_all() returned unexpected error " << code;
|
|
}
|
|
/* else ... < 0: error */
|
|
|
|
return Error() << "Invalid code: " << code;
|
|
}
|
|
|
|
/* mount_all <fstab> [ <path> ]* [--<options>]*
|
|
*
|
|
* This function might request a reboot, in which case it will
|
|
* not return.
|
|
*/
|
|
static Result<Success> do_mount_all(const BuiltinArguments& args) {
|
|
std::size_t na = 0;
|
|
bool import_rc = true;
|
|
bool queue_event = true;
|
|
int mount_mode = MOUNT_MODE_DEFAULT;
|
|
const char* fstabfile = args[1].c_str();
|
|
std::size_t path_arg_end = args.size();
|
|
const char* prop_post_fix = "default";
|
|
|
|
for (na = args.size() - 1; na > 1; --na) {
|
|
if (args[na] == "--early") {
|
|
path_arg_end = na;
|
|
queue_event = false;
|
|
mount_mode = MOUNT_MODE_EARLY;
|
|
prop_post_fix = "early";
|
|
} else if (args[na] == "--late") {
|
|
path_arg_end = na;
|
|
import_rc = false;
|
|
mount_mode = MOUNT_MODE_LATE;
|
|
prop_post_fix = "late";
|
|
}
|
|
}
|
|
|
|
std::string prop_name = "ro.boottime.init.mount_all."s + prop_post_fix;
|
|
android::base::Timer t;
|
|
auto mount_fstab_return_code = mount_fstab(fstabfile, mount_mode);
|
|
if (!mount_fstab_return_code) {
|
|
return Error() << "mount_fstab() failed " << mount_fstab_return_code.error();
|
|
}
|
|
property_set(prop_name, std::to_string(t.duration().count()));
|
|
|
|
if (import_rc) {
|
|
/* Paths of .rc files are specified at the 2nd argument and beyond */
|
|
import_late(args.args, 2, path_arg_end);
|
|
}
|
|
|
|
if (queue_event) {
|
|
/* queue_fs_event will queue event based on mount_fstab return code
|
|
* and return processed return code*/
|
|
auto queue_fs_result = queue_fs_event(*mount_fstab_return_code);
|
|
if (!queue_fs_result) {
|
|
return Error() << "queue_fs_event() failed: " << queue_fs_result.error();
|
|
}
|
|
}
|
|
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_swapon_all(const BuiltinArguments& args) {
|
|
struct fstab *fstab;
|
|
int ret;
|
|
|
|
fstab = fs_mgr_read_fstab(args[1].c_str());
|
|
ret = fs_mgr_swapon_all(fstab);
|
|
fs_mgr_free_fstab(fstab);
|
|
|
|
if (ret != 0) return Error() << "fs_mgr_swapon_all() failed";
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_setprop(const BuiltinArguments& args) {
|
|
property_set(args[1], args[2]);
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_setrlimit(const BuiltinArguments& args) {
|
|
auto rlimit = ParseRlimit(args.args);
|
|
if (!rlimit) return rlimit.error();
|
|
|
|
if (setrlimit(rlimit->first, &rlimit->second) == -1) {
|
|
return ErrnoError() << "setrlimit failed";
|
|
}
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_start(const BuiltinArguments& args) {
|
|
Service* svc = ServiceList::GetInstance().FindService(args[1]);
|
|
if (!svc) return Error() << "service " << args[1] << " not found";
|
|
if (auto result = svc->Start(); !result) {
|
|
return Error() << "Could not start service: " << result.error();
|
|
}
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_stop(const BuiltinArguments& args) {
|
|
Service* svc = ServiceList::GetInstance().FindService(args[1]);
|
|
if (!svc) return Error() << "service " << args[1] << " not found";
|
|
svc->Stop();
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_restart(const BuiltinArguments& args) {
|
|
Service* svc = ServiceList::GetInstance().FindService(args[1]);
|
|
if (!svc) return Error() << "service " << args[1] << " not found";
|
|
svc->Restart();
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_trigger(const BuiltinArguments& args) {
|
|
ActionManager::GetInstance().QueueEventTrigger(args[1]);
|
|
return Success();
|
|
}
|
|
|
|
static int MakeSymlink(const std::string& target, const std::string& linkpath) {
|
|
std::string secontext;
|
|
// Passing 0 for mode should work.
|
|
if (SelabelLookupFileContext(linkpath, 0, &secontext) && !secontext.empty()) {
|
|
setfscreatecon(secontext.c_str());
|
|
}
|
|
|
|
int rc = symlink(target.c_str(), linkpath.c_str());
|
|
|
|
if (!secontext.empty()) {
|
|
int save_errno = errno;
|
|
setfscreatecon(nullptr);
|
|
errno = save_errno;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static Result<Success> do_symlink(const BuiltinArguments& args) {
|
|
if (MakeSymlink(args[1], args[2]) < 0) {
|
|
// The symlink builtin is often used to create symlinks for older devices to be backwards
|
|
// compatible with new paths, therefore we skip reporting this error.
|
|
if (errno == EEXIST && android::base::GetMinimumLogSeverity() > android::base::DEBUG) {
|
|
return Success();
|
|
}
|
|
return ErrnoError() << "symlink() failed";
|
|
}
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_rm(const BuiltinArguments& args) {
|
|
if (unlink(args[1].c_str()) < 0) {
|
|
return ErrnoError() << "unlink() failed";
|
|
}
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_rmdir(const BuiltinArguments& args) {
|
|
if (rmdir(args[1].c_str()) < 0) {
|
|
return ErrnoError() << "rmdir() failed";
|
|
}
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_sysclktz(const BuiltinArguments& args) {
|
|
struct timezone tz = {};
|
|
if (!android::base::ParseInt(args[1], &tz.tz_minuteswest)) {
|
|
return Error() << "Unable to parse mins_west_of_gmt";
|
|
}
|
|
|
|
if (settimeofday(nullptr, &tz) == -1) {
|
|
return ErrnoError() << "settimeofday() failed";
|
|
}
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_verity_load_state(const BuiltinArguments& args) {
|
|
int mode = -1;
|
|
bool loaded = fs_mgr_load_verity_state(&mode);
|
|
if (loaded && mode != VERITY_MODE_DEFAULT) {
|
|
ActionManager::GetInstance().QueueEventTrigger("verity-logging");
|
|
}
|
|
if (!loaded) return Error() << "Could not load verity state";
|
|
|
|
return Success();
|
|
}
|
|
|
|
static void verity_update_property(fstab_rec *fstab, const char *mount_point,
|
|
int mode, int status) {
|
|
property_set("partition."s + mount_point + ".verified", std::to_string(mode));
|
|
}
|
|
|
|
static Result<Success> do_verity_update_state(const BuiltinArguments& args) {
|
|
if (!fs_mgr_update_verity_state(verity_update_property)) {
|
|
return Error() << "fs_mgr_update_verity_state() failed";
|
|
}
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_write(const BuiltinArguments& args) {
|
|
if (auto result = WriteFile(args[1], args[2]); !result) {
|
|
return Error() << "Unable to write to file '" << args[1] << "': " << result.error();
|
|
}
|
|
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> readahead_file(const std::string& filename, bool fully) {
|
|
android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(filename.c_str(), O_RDONLY)));
|
|
if (fd == -1) {
|
|
return ErrnoError() << "Error opening file";
|
|
}
|
|
if (posix_fadvise(fd, 0, 0, POSIX_FADV_WILLNEED)) {
|
|
return ErrnoError() << "Error posix_fadvise file";
|
|
}
|
|
if (readahead(fd, 0, std::numeric_limits<size_t>::max())) {
|
|
return ErrnoError() << "Error readahead file";
|
|
}
|
|
if (fully) {
|
|
char buf[BUFSIZ];
|
|
ssize_t n;
|
|
while ((n = TEMP_FAILURE_RETRY(read(fd, &buf[0], sizeof(buf)))) > 0) {
|
|
}
|
|
if (n != 0) {
|
|
return ErrnoError() << "Error reading file";
|
|
}
|
|
}
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_readahead(const BuiltinArguments& args) {
|
|
struct stat sb;
|
|
|
|
if (stat(args[1].c_str(), &sb)) {
|
|
return ErrnoError() << "Error opening " << args[1];
|
|
}
|
|
|
|
bool readfully = false;
|
|
if (args.size() == 3 && args[2] == "--fully") {
|
|
readfully = true;
|
|
}
|
|
// We will do readahead in a forked process in order not to block init
|
|
// since it may block while it reads the
|
|
// filesystem metadata needed to locate the requested blocks. This
|
|
// occurs frequently with ext[234] on large files using indirect blocks
|
|
// instead of extents, giving the appearance that the call blocks until
|
|
// the requested data has been read.
|
|
pid_t pid = fork();
|
|
if (pid == 0) {
|
|
if (setpriority(PRIO_PROCESS, 0, static_cast<int>(ANDROID_PRIORITY_LOWEST)) != 0) {
|
|
PLOG(WARNING) << "setpriority failed";
|
|
}
|
|
if (android_set_ioprio(0, IoSchedClass_IDLE, 7)) {
|
|
PLOG(WARNING) << "ioprio_get failed";
|
|
}
|
|
android::base::Timer t;
|
|
if (S_ISREG(sb.st_mode)) {
|
|
if (auto result = readahead_file(args[1], readfully); !result) {
|
|
LOG(WARNING) << "Unable to readahead '" << args[1] << "': " << result.error();
|
|
_exit(EXIT_FAILURE);
|
|
}
|
|
} else if (S_ISDIR(sb.st_mode)) {
|
|
char* paths[] = {const_cast<char*>(args[1].data()), nullptr};
|
|
std::unique_ptr<FTS, decltype(&fts_close)> fts(
|
|
fts_open(paths, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr), fts_close);
|
|
if (!fts) {
|
|
PLOG(ERROR) << "Error opening directory: " << args[1];
|
|
_exit(EXIT_FAILURE);
|
|
}
|
|
// Traverse the entire hierarchy and do readahead
|
|
for (FTSENT* ftsent = fts_read(fts.get()); ftsent != nullptr;
|
|
ftsent = fts_read(fts.get())) {
|
|
if (ftsent->fts_info & FTS_F) {
|
|
const std::string filename = ftsent->fts_accpath;
|
|
if (auto result = readahead_file(filename, readfully); !result) {
|
|
LOG(WARNING)
|
|
<< "Unable to readahead '" << filename << "': " << result.error();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
LOG(INFO) << "Readahead " << args[1] << " took " << t << " asynchronously";
|
|
_exit(0);
|
|
} else if (pid < 0) {
|
|
return ErrnoError() << "Fork failed";
|
|
}
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_copy(const BuiltinArguments& args) {
|
|
auto file_contents = ReadFile(args[1]);
|
|
if (!file_contents) {
|
|
return Error() << "Could not read input file '" << args[1] << "': " << file_contents.error();
|
|
}
|
|
if (auto result = WriteFile(args[2], *file_contents); !result) {
|
|
return Error() << "Could not write to output file '" << args[2] << "': " << result.error();
|
|
}
|
|
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_chown(const BuiltinArguments& args) {
|
|
auto uid = DecodeUid(args[1]);
|
|
if (!uid) {
|
|
return Error() << "Unable to decode UID for '" << args[1] << "': " << uid.error();
|
|
}
|
|
|
|
// GID is optional and pushes the index of path out by one if specified.
|
|
const std::string& path = (args.size() == 4) ? args[3] : args[2];
|
|
Result<gid_t> gid = -1;
|
|
|
|
if (args.size() == 4) {
|
|
gid = DecodeUid(args[2]);
|
|
if (!gid) {
|
|
return Error() << "Unable to decode GID for '" << args[2] << "': " << gid.error();
|
|
}
|
|
}
|
|
|
|
if (lchown(path.c_str(), *uid, *gid) == -1) {
|
|
return ErrnoError() << "lchown() failed";
|
|
}
|
|
|
|
return Success();
|
|
}
|
|
|
|
static mode_t get_mode(const char *s) {
|
|
mode_t mode = 0;
|
|
while (*s) {
|
|
if (*s >= '0' && *s <= '7') {
|
|
mode = (mode<<3) | (*s-'0');
|
|
} else {
|
|
return -1;
|
|
}
|
|
s++;
|
|
}
|
|
return mode;
|
|
}
|
|
|
|
static Result<Success> do_chmod(const BuiltinArguments& args) {
|
|
mode_t mode = get_mode(args[1].c_str());
|
|
if (fchmodat(AT_FDCWD, args[2].c_str(), mode, AT_SYMLINK_NOFOLLOW) < 0) {
|
|
return ErrnoError() << "fchmodat() failed";
|
|
}
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_restorecon(const BuiltinArguments& args) {
|
|
int ret = 0;
|
|
|
|
struct flag_type {const char* name; int value;};
|
|
static const flag_type flags[] = {
|
|
{"--recursive", SELINUX_ANDROID_RESTORECON_RECURSE},
|
|
{"--skip-ce", SELINUX_ANDROID_RESTORECON_SKIPCE},
|
|
{"--cross-filesystems", SELINUX_ANDROID_RESTORECON_CROSS_FILESYSTEMS},
|
|
{0, 0}
|
|
};
|
|
|
|
int flag = 0;
|
|
|
|
bool in_flags = true;
|
|
for (size_t i = 1; i < args.size(); ++i) {
|
|
if (android::base::StartsWith(args[i], "--")) {
|
|
if (!in_flags) {
|
|
return Error() << "flags must precede paths";
|
|
}
|
|
bool found = false;
|
|
for (size_t j = 0; flags[j].name; ++j) {
|
|
if (args[i] == flags[j].name) {
|
|
flag |= flags[j].value;
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
return Error() << "bad flag " << args[i];
|
|
}
|
|
} else {
|
|
in_flags = false;
|
|
if (selinux_android_restorecon(args[i].c_str(), flag) < 0) {
|
|
ret = errno;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (ret) return ErrnoError() << "selinux_android_restorecon() failed";
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_restorecon_recursive(const BuiltinArguments& args) {
|
|
std::vector<std::string> non_const_args(args.args);
|
|
non_const_args.insert(std::next(non_const_args.begin()), "--recursive");
|
|
return do_restorecon({std::move(non_const_args), args.context});
|
|
}
|
|
|
|
static Result<Success> do_loglevel(const BuiltinArguments& args) {
|
|
// TODO: support names instead/as well?
|
|
int log_level = -1;
|
|
android::base::ParseInt(args[1], &log_level);
|
|
android::base::LogSeverity severity;
|
|
switch (log_level) {
|
|
case 7: severity = android::base::DEBUG; break;
|
|
case 6: severity = android::base::INFO; break;
|
|
case 5:
|
|
case 4: severity = android::base::WARNING; break;
|
|
case 3: severity = android::base::ERROR; break;
|
|
case 2:
|
|
case 1:
|
|
case 0: severity = android::base::FATAL; break;
|
|
default:
|
|
return Error() << "invalid log level " << log_level;
|
|
}
|
|
android::base::SetMinimumLogSeverity(severity);
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_load_persist_props(const BuiltinArguments& args) {
|
|
load_persist_props();
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_load_system_props(const BuiltinArguments& args) {
|
|
load_system_props();
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_wait(const BuiltinArguments& args) {
|
|
auto timeout = kCommandRetryTimeout;
|
|
if (args.size() == 3) {
|
|
int timeout_int;
|
|
if (!android::base::ParseInt(args[2], &timeout_int)) {
|
|
return Error() << "failed to parse timeout";
|
|
}
|
|
timeout = std::chrono::seconds(timeout_int);
|
|
}
|
|
|
|
if (wait_for_file(args[1].c_str(), timeout) != 0) {
|
|
return Error() << "wait_for_file() failed";
|
|
}
|
|
|
|
return Success();
|
|
}
|
|
|
|
static Result<Success> do_wait_for_prop(const BuiltinArguments& args) {
|
|
const char* name = args[1].c_str();
|
|
const char* value = args[2].c_str();
|
|
size_t value_len = strlen(value);
|
|
|
|
if (!IsLegalPropertyName(name)) {
|
|
return Error() << "IsLegalPropertyName(" << name << ") failed";
|
|
}
|
|
if (value_len >= PROP_VALUE_MAX) {
|
|
return Error() << "value too long";
|
|
}
|
|
if (!start_waiting_for_property(name, value)) {
|
|
return Error() << "already waiting for a property";
|
|
}
|
|
return Success();
|
|
}
|
|
|
|
static bool is_file_crypto() {
|
|
return android::base::GetProperty("ro.crypto.type", "") == "file";
|
|
}
|
|
|
|
static Result<Success> do_installkey(const BuiltinArguments& args) {
|
|
if (!is_file_crypto()) return Success();
|
|
|
|
auto unencrypted_dir = args[1] + e4crypt_unencrypted_folder;
|
|
if (!make_dir(unencrypted_dir, 0700) && errno != EEXIST) {
|
|
return ErrnoError() << "Failed to create " << unencrypted_dir;
|
|
}
|
|
std::vector<std::string> exec_args = {"exec", "/system/bin/vdc", "--wait", "cryptfs",
|
|
"enablefilecrypto"};
|
|
return do_exec({std::move(exec_args), args.context});
|
|
}
|
|
|
|
static Result<Success> do_init_user0(const BuiltinArguments& args) {
|
|
std::vector<std::string> exec_args = {"exec", "/system/bin/vdc", "--wait", "cryptfs",
|
|
"init_user0"};
|
|
return do_exec({std::move(exec_args), args.context});
|
|
}
|
|
|
|
// Builtin-function-map start
|
|
const BuiltinFunctionMap::Map& BuiltinFunctionMap::map() const {
|
|
constexpr std::size_t kMax = std::numeric_limits<std::size_t>::max();
|
|
// clang-format off
|
|
static const Map builtin_functions = {
|
|
{"bootchart", {1, 1, {false, do_bootchart}}},
|
|
{"chmod", {2, 2, {true, do_chmod}}},
|
|
{"chown", {2, 3, {true, do_chown}}},
|
|
{"class_reset", {1, 1, {false, do_class_reset}}},
|
|
{"class_restart", {1, 1, {false, do_class_restart}}},
|
|
{"class_start", {1, 1, {false, do_class_start}}},
|
|
{"class_stop", {1, 1, {false, do_class_stop}}},
|
|
{"copy", {2, 2, {true, do_copy}}},
|
|
{"domainname", {1, 1, {true, do_domainname}}},
|
|
{"enable", {1, 1, {false, do_enable}}},
|
|
{"exec", {1, kMax, {false, do_exec}}},
|
|
{"exec_background", {1, kMax, {false, do_exec_background}}},
|
|
{"exec_start", {1, 1, {false, do_exec_start}}},
|
|
{"export", {2, 2, {false, do_export}}},
|
|
{"hostname", {1, 1, {true, do_hostname}}},
|
|
{"ifup", {1, 1, {true, do_ifup}}},
|
|
{"init_user0", {0, 0, {false, do_init_user0}}},
|
|
{"insmod", {1, kMax, {true, do_insmod}}},
|
|
{"installkey", {1, 1, {false, do_installkey}}},
|
|
{"load_persist_props", {0, 0, {false, do_load_persist_props}}},
|
|
{"load_system_props", {0, 0, {false, do_load_system_props}}},
|
|
{"loglevel", {1, 1, {false, do_loglevel}}},
|
|
{"mkdir", {1, 4, {true, do_mkdir}}},
|
|
// TODO: Do mount operations in vendor_init.
|
|
// mount_all is currently too complex to run in vendor_init as it queues action triggers,
|
|
// imports rc scripts, etc. It should be simplified and run in vendor_init context.
|
|
// mount and umount are run in the same context as mount_all for symmetry.
|
|
{"mount_all", {1, kMax, {false, do_mount_all}}},
|
|
{"mount", {3, kMax, {false, do_mount}}},
|
|
{"umount", {1, 1, {false, do_umount}}},
|
|
{"readahead", {1, 2, {true, do_readahead}}},
|
|
{"restart", {1, 1, {false, do_restart}}},
|
|
{"restorecon", {1, kMax, {true, do_restorecon}}},
|
|
{"restorecon_recursive", {1, kMax, {true, do_restorecon_recursive}}},
|
|
{"rm", {1, 1, {true, do_rm}}},
|
|
{"rmdir", {1, 1, {true, do_rmdir}}},
|
|
{"setprop", {2, 2, {true, do_setprop}}},
|
|
{"setrlimit", {3, 3, {false, do_setrlimit}}},
|
|
{"start", {1, 1, {false, do_start}}},
|
|
{"stop", {1, 1, {false, do_stop}}},
|
|
{"swapon_all", {1, 1, {false, do_swapon_all}}},
|
|
{"symlink", {2, 2, {true, do_symlink}}},
|
|
{"sysclktz", {1, 1, {false, do_sysclktz}}},
|
|
{"trigger", {1, 1, {false, do_trigger}}},
|
|
{"verity_load_state", {0, 0, {false, do_verity_load_state}}},
|
|
{"verity_update_state", {0, 0, {false, do_verity_update_state}}},
|
|
{"wait", {1, 2, {true, do_wait}}},
|
|
{"wait_for_prop", {2, 2, {false, do_wait_for_prop}}},
|
|
{"write", {2, 2, {true, do_write}}},
|
|
};
|
|
// clang-format on
|
|
return builtin_functions;
|
|
}
|
|
// Builtin-function-map end
|
|
|
|
} // namespace init
|
|
} // namespace android
|