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/*
 * SyslogAppender.hh
 *
 * Copyright 2000, LifeLine Networks BV (www.lifeline.nl). All rights reserved.
 * Copyright 2000, Bastiaan Bakker. All rights reserved.
 *
 * See the COPYING file for the terms of usage and distribution.
 */

#ifndef _LOG4CPP_SYSLOGAPPENDER_HH
#define _LOG4CPP_SYSLOGAPPENDER_HH

#include <log4cpp/Portability.hh>
#include <string>
#include <stdarg.h>
#include <syslog.h>
#include <log4cpp/LayoutAppender.hh>
#include <log4cpp/Priority.hh>

namespace log4cpp {

    /**
     * SyslogAppender sends LoggingEvents to the local syslog system.
     **/
    class SyslogAppender : public LayoutAppender {
        public:

        /**
         * Translates a log4cpp priority to a syslog priority
         * @param priority The log4cpp priority.
         * @returns the syslog priority.
         **/
        static int toSyslogPriority(Priority::Value priority);

        /**
         * Instantiate a SyslogAppender with given name and name and facility
         * for syslog. Note that the C syslog API is process global, so 
         * instantion of a second SyslogAppender will 'overwrite' the 
         * syslog name of the first.
         * @param name The name of the Appender
         * @param syslogName The ident parameter in the openlog(3) call.
         * @param facility The syslog facility to log to. Defaults to LOG_USER.
         **/         
        SyslogAppender(const std::string& name, const std::string& syslogName, 
                       int facility = LOG_USER);
        virtual ~SyslogAppender();

        /**
         * Calls closelog(3) and openlog(3).
         **/
        virtual bool reopen();

        /**
         * Calls closelog(3) to close the syslog file descriptor.
         **/
        virtual void close();

       protected:
        
        /**
         * Calls openlog(3).
         **/
        virtual void open();

        /**
         * Sends a LoggingEvent to syslog.
         * @param event the LoggingEvent to log.
         **/
        virtual void _append(const LoggingEvent& event);

        const std::string _syslogName;
        int _facility;
    };
}

#endif // _LOG4CPP_SYSLOGAPPENDER_HH