ClickHouse/base/poco/Foundation/include/Poco/SyslogChannel.h

//
// SyslogChannel.h
//
// Library: Foundation
// Package: Logging
// Module:  SyslogChannel
//
// Definition of the SyslogChannel class specific to UNIX.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_SyslogChannel_INCLUDED
#define Foundation_SyslogChannel_INCLUDED


#include "Poco/Channel.h"
#include "Poco/Foundation.h"


namespace Poco
{


class Foundation_API SyslogChannel : public Channel
/// This Unix-only channel works with the Unix syslog service.
{
public:
    enum Option
    {
        SYSLOG_PID = 0x01, /// log the pid with each message
        SYSLOG_CONS = 0x02, /// log on the console if errors in sending
        SYSLOG_NDELAY = 0x08, /// don't delay open
        SYSLOG_PERROR = 0x20 /// log to stderr as well (not supported on all platforms)
    };

    enum Facility
    {
        SYSLOG_KERN = (0 << 3), /// kernel messages
        SYSLOG_USER = (1 << 3), /// random user-level messages
        SYSLOG_MAIL = (2 << 3), /// mail system
        SYSLOG_DAEMON = (3 << 3), /// system daemons
        SYSLOG_AUTH = (4 << 3), /// security/authorization messages
        SYSLOG_SYSLOG = (5 << 3), /// messages generated internally by syslogd
        SYSLOG_LPR = (6 << 3), /// line printer subsystem
        SYSLOG_NEWS = (7 << 3), /// network news subsystem
        SYSLOG_UUCP = (8 << 3), /// UUCP subsystem
        SYSLOG_CRON = (9 << 3), /// clock daemon
        SYSLOG_AUTHPRIV = (10 << 3), /// security/authorization messages (private)
        SYSLOG_FTP = (11 << 3), /// ftp daemon
        SYSLOG_LOCAL0 = (16 << 3), /// reserved for local use
        SYSLOG_LOCAL1 = (17 << 3), /// reserved for local use
        SYSLOG_LOCAL2 = (18 << 3), /// reserved for local use
        SYSLOG_LOCAL3 = (19 << 3), /// reserved for local use
        SYSLOG_LOCAL4 = (20 << 3), /// reserved for local use
        SYSLOG_LOCAL5 = (21 << 3), /// reserved for local use
        SYSLOG_LOCAL6 = (22 << 3), /// reserved for local use
        SYSLOG_LOCAL7 = (23 << 3) /// reserved for local use
    };

    SyslogChannel();
    /// Creates a SyslogChannel.

    SyslogChannel(const std::string & name, int options = SYSLOG_CONS, int facility = SYSLOG_USER);
    /// Creates a SyslogChannel with the given name, options and facility.

    void open();
    /// Opens the SyslogChannel.

    void close();
    /// Closes the SyslogChannel.

    void log(const Message & msg);
    /// Sens the message's text to the syslog service.

    void setProperty(const std::string & name, const std::string & value);
    /// Sets the property with the given value.
    ///
    /// The following properties are supported:
    ///     * name:     The name used to identify the source of log messages.
    ///     * facility: The facility added to each log message. See the Facility enumeration for a list of supported values.
    ///     * options:  The logging options. See the Option enumeration for a list of supported values.

    std::string getProperty(const std::string & name) const;
    /// Returns the value of the property with the given name.

    static const std::string PROP_NAME;
    static const std::string PROP_FACILITY;
    static const std::string PROP_OPTIONS;

protected:
    ~SyslogChannel();
    static int getPrio(const Message & msg);

private:
    std::string _name;
    int _options;
    int _facility;
    bool _open;
};


} // namespace Poco


#endif // Foundation_SyslogChannel_INCLUDED