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arangodb/lib/ApplicationFeatures/DaemonFeature.h

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////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2016 ArangoDB GmbH, Cologne, Germany
///
/// 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.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
////////////////////////////////////////////////////////////////////////////////
#ifndef ARANGODB_APPLICATION_FEATURES_DAEMON_FEATURE_H
#define ARANGODB_APPLICATION_FEATURES_DAEMON_FEATURE_H 1
#include <memory>
#include <string>
#include "ApplicationFeatures/ApplicationFeature.h"
namespace arangodb {
namespace application_features {
class ApplicationServer;
}
namespace options {
class ProgramOptions;
}
class DaemonFeature final : public application_features::ApplicationFeature {
public:
explicit DaemonFeature(application_features::ApplicationServer& server);
void collectOptions(std::shared_ptr<options::ProgramOptions>) override final;
void validateOptions(std::shared_ptr<options::ProgramOptions>) override final;
void daemonize() override final;
void unprepare() override final;
void setDaemon(bool value) { _daemon = value; }
static void remapStandardFileDescriptors();
private:
void checkPidFile();
int forkProcess();
void writePidFile(int);
int waitForChildProcess(int);
public:
bool _daemon = false;
std::string _pidFile = "";
std::string _workingDirectory = ".";
private:
std::string _current;
};
} // namespace arangodb
#endif