glogoutput_unix.cpp

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//
// Copyright (C) 2017 Graeme Walker
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// ===
//
// glogoutput_unix.cpp
//

#include "gdef.h"
#include "glogoutput.h"
#include <syslog.h>
#include <iostream>

namespace
{
    int decode( G::LogOutput::SyslogFacility facility )
    {
        if( facility == G::LogOutput::User ) return LOG_USER ;
        if( facility == G::LogOutput::Daemon ) return LOG_DAEMON ;
        if( facility == G::LogOutput::Mail ) return LOG_MAIL ;
        if( facility == G::LogOutput::Cron ) return LOG_CRON ;
        // etc...
        return LOG_USER ;
    }
    int decode( G::Log::Severity severity )
    {
        if( severity == G::Log::s_Warning ) return LOG_WARNING ;
        if( severity == G::Log::s_Error ) return LOG_ERR ;
        if( severity == G::Log::s_LogSummary ) return LOG_INFO ;
        if( severity == G::Log::s_LogVerbose ) return LOG_INFO ;
        return LOG_CRIT ;
    }
    int mode( G::LogOutput::SyslogFacility facility , G::Log::Severity severity )
    {
        return decode(facility) | decode(severity) ;
    }
}

void G::LogOutput::rawOutput( std::ostream & std_err , G::Log::Severity severity , const std::string & message )
{
    if( severity != G::Log::s_Debug && m_syslog )
    {
        ::syslog( mode(m_facility,severity) , "%s" , message.c_str() ) ;
    }
    std_err << message << std::endl ;
}

void G::LogOutput::init()
{
    if( m_syslog )
        ::openlog( nullptr , LOG_PID , decode(m_facility) ) ;
}

void G::LogOutput::cleanup()
{
    if( m_syslog )
        ::closelog() ;
}

void G::LogOutput::getLocalTime( time_t epoch_time , struct std::tm * broken_down_time_p )
{
    localtime_r( &epoch_time , broken_down_time_p ) ; // see gdef.h
}

/// \file glogoutput_unix.cpp