update_systemd.cpp

/*
 * Copyright 2019 Google Inc.
 *
 * 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 "update_systemd.hpp"

#include "status.hpp"
#include "update.hpp"

#include <memory>
#include <sdbusplus/bus.hpp>
#include <string>

namespace ipmi_flash
{

std::unique_ptr<UpdateInterface>
    SystemdUpdateMechanism::CreateSystemdUpdate(sdbusplus::bus::bus&& bus,
                                                const std::string& target,
                                                const std::string& mode)
{
    return std::make_unique<SystemdUpdateMechanism>(std::move(bus), target,
                                                    mode);
}

bool SystemdUpdateMechanism::triggerUpdate()
{
    /* TODO: Add a util method for triggering a service with optional additional
     * parameter. */
    static constexpr auto systemdService = "org.freedesktop.systemd1";
    static constexpr auto systemdRoot = "/org/freedesktop/systemd1";
    static constexpr auto systemdInterface = "org.freedesktop.systemd1.Manager";

    auto method = bus.new_method_call(systemdService, systemdRoot,
                                      systemdInterface, "StartUnit");
    method.append(target);

    if (!mode.empty())
    {
        method.append(mode);
    }

    try
    {
        bus.call_noreply(method);
        return true;
    }
    catch (const sdbusplus::exception::SdBusError& ex)
    {
        return false;
    }
}

void SystemdUpdateMechanism::abortUpdate()
{
    return;
}

UpdateStatus SystemdUpdateMechanism::status()
{
    /* For now, don't check if the target failed. */
    return UpdateStatus::running;
}

} // namespace ipmi_flash