/*
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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 "apexd"
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#include "apexd_prop.h"
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#include <android-base/logging.h>
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#include <android-base/properties.h>
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#include "apexd_utils.h"
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namespace android {
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namespace apex {
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void waitForBootStatus(Status (&rollback_fn)(), void (&complete_fn)()) {
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while (true) {
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// Check for change in either crashing property or sys.boot_completed
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// Wait for updatable_crashing property change for most of the time
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// (arbitrary 30s), briefly check if boot has completed successfully,
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// if not continue waiting for updatable_crashing.
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// We use this strategy so that we can quickly detect if an updatable
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// process is crashing.
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if (android::base::WaitForProperty("ro.init.updatable_crashing", "1",
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std::chrono::seconds(30))) {
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LOG(INFO) << "Updatable crashing, attempting rollback";
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auto status = rollback_fn();
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if (!status.Ok()) {
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LOG(ERROR) << "Rollback failed : " << status.ErrorMessage();
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} else {
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LOG(INFO) << "Successfuly rolled back. Rebooting device";
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Reboot();
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}
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return;
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}
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if (android::base::GetProperty("sys.boot_completed", "") == "1") {
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// Boot completed we can return
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complete_fn();
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return;
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}
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}
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}
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} // namespace apex
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} // namespace android
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