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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 "apexd"
#include "apexd_prop.h"
#include <android-base/logging.h>
#include <android-base/properties.h>
#include "apexd_utils.h"
using android::base::GetBoolProperty;
using android::base::GetProperty;
using android::base::Result;
using android::base::WaitForProperty;
namespace android {
namespace apex {
void waitForBootStatus(Result<void> (&revert_fn)(const std::string&),
void (&complete_fn)()) {
while (!GetBoolProperty("sys.boot_completed", false)) {
// Check for change in either crashing property or sys.boot_completed
// Wait for updatable_crashing property change for most of the time
// (arbitrary 30s), briefly check if boot has completed successfully,
// if not continue waiting for updatable_crashing.
// We use this strategy so that we can quickly detect if an updatable
// process is crashing.
if (WaitForProperty("sys.init.updatable_crashing", "1",
std::chrono::seconds(30))) {
auto name = GetProperty("sys.init.updatable_crashing_process_name", "");
LOG(ERROR) << "Native process '" << (name.empty() ? "[unknown]" : name)
<< "' is crashing. Attempting a revert";
auto result = revert_fn(name);
if (!result.ok()) {
LOG(ERROR) << "Revert failed : " << result.error();
break;
} else {
// This should never be reached, since revert_fn should've rebooted a
// device. But if for some reason we end up here, let's reboot it
// manually.
LOG(ERROR) << "Active sessions were reverted, but reboot wasn't "
"triggered. Rebooting manually";
Reboot();
return;
}
}
}
// Wait for boot to complete, and then run complete_fn.
// TODO(ioffe): this is a hack, instead we should have a binder call from
// system_server into apexd when boot completes.
if (WaitForProperty("sys.boot_completed", "1", std::chrono::minutes(5))) {
complete_fn();
return;
} else {
LOG(ERROR) << "Boot never completed";
}
}
} // namespace apex
} // namespace android
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