src/syslog.c

/*
**  igmpproxy - IGMP proxy based multicast router
**  Copyright (C) 2005 Johnny Egeland <johnny@rlo.org>
**
**  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 2 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, write to the Free Software
**  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
**
**----------------------------------------------------------------------------
**
**  This software is derived work from the following software. The original
**  source code has been modified from it's original state by the author
**  of igmpproxy.
**
**  smcroute 0.92 - Copyright (C) 2001 Carsten Schill <carsten@cschill.de>
**  - Licensed under the GNU General Public License, either version 2 or
**    any later version.
**
**  mrouted 3.9-beta3 - Copyright (C) 2002 by The Board of Trustees of
**  Leland Stanford Junior University.
**  - Licensed under the 3-clause BSD license, see Stanford.txt file.
**
*/

#include "igmpproxy.h"

int LogLevel = LOG_WARNING;
bool Log2Stderr = false;

void my_log( int Severity, int Errno, const char *FmtSt, ... )
{
    char LogMsg[ 128 ];

    va_list ArgPt;
    unsigned Ln;
    va_start( ArgPt, FmtSt );
    Ln = vsnprintf( LogMsg, sizeof( LogMsg ), FmtSt, ArgPt );
    if( Errno > 0 )
        snprintf( LogMsg + Ln, sizeof( LogMsg ) - Ln,
                "; Errno(%d): %s", Errno, strerror(Errno) );
    va_end( ArgPt );

    if (Severity <= LogLevel) {
        if (Log2Stderr)
            fprintf(stderr, "%s\n", LogMsg);
        else {
            syslog(Severity, "%s", LogMsg);
        }
    }

    if( Severity <= LOG_ERR )
        exit( -1 );
}