daemon.h

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// Copyright (C) 2014-2018 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#ifndef DAEMON_H
#define DAEMON_H

#include <cc/data.h>
#include <process/config_base.h>
#include <util/pid_file.h>
#include <util/signal_set.h>
#include <boost/noncopyable.hpp>
#include <string>

namespace isc {
namespace process {

class DaemonPIDExists : public Exception {
public:
    DaemonPIDExists(const char* file, size_t line, const char* what) :
        isc::Exception(file, line, what) { };
};

class Daemon : public boost::noncopyable {

public:
    Daemon();

    virtual ~Daemon();

    virtual void cleanup();

    virtual void shutdown();

    static void loggerInit(const char* log_name, bool verbose);

    static void configureLogger(const isc::data::ConstElementPtr& log_config,
                                const isc::process::ConfigPtr& storage);

    static void setVerbose(const bool verbose);

    static bool getVerbose();

    static std::string getVersion(bool extended);

    std::string getConfigFile() const;

    void setConfigFile(const std::string& config_file);

    void checkConfigFile() const;

    virtual size_t
    writeConfigFile(const std::string& config_file,
                    isc::data::ConstElementPtr cfg = isc::data::ConstElementPtr()) const;

    std::string getProcName() const;

    void setProcName(const std::string& proc_name);

    std::string getPIDFileDir() const;

    void setPIDFileDir(const std::string& pid_file_dir);

    std::string getPIDFileName() const;

    void setPIDFileName(const std::string& pid_file_name);

    void createPIDFile(int pid = 0);

    static std::string getDefaultLoggerName() {
        return (default_logger_name_);
    }

    static void setDefaultLoggerName(const std::string& logger) {
        default_logger_name_ = logger;
    }

protected:

    virtual void handleSignal();

    isc::util::SignalSetPtr signal_set_;

    isc::util::SignalHandler signal_handler_;

    std::string makePIDFileName() const;

private:
    std::string config_file_;

    std::string proc_name_;

    std::string pid_file_dir_;

    isc::util::PIDFilePtr pid_file_;

    static bool verbose_;

    static std::string default_logger_name_;

    bool am_file_author_;
};

}; // end of isc::dhcp namespace
}; // end of isc namespace

#endif