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