guest/services/suspend_blocker/suspend_blocker.cpp

/*
 * Copyright 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.
 */

#include <signal.h>
#include <wakelock/wakelock.h>

int main() {
    auto wl = android::wakelock::WakeLock::tryGet("suspend_blocker");  // RAII object
    if (!wl.has_value()) {
        return EXIT_FAILURE;
    }

    sigset_t mask;
    sigemptyset(&mask);
    return sigsuspend(&mask);  // Infinite sleep
}