SyslogStream.h

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/*
 * SyslogStream.h
 *
 * Copyright (C) 2011 IBR, TU Braunschweig
 *
 * Written-by: Johannes Morgenroth <morgenroth@ibr.cs.tu-bs.de>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#ifndef IBRCOMMON_SYSLOGSTREAM_H
#define IBRCOMMON_SYSLOGSTREAM_H

#include <vector>
#include <syslog.h>
#include <iostream>
#include <string.h>

namespace ibrcommon
{
        enum SyslogPriority
        {
                SYSLOG_EMERG =  LOG_EMERG,      /* system is unusable */
                SYSLOG_ALERT =  LOG_ALERT,      /* action must be taken immediately */
                SYSLOG_CRIT =   LOG_CRIT,       /* critical conditions */
                SYSLOG_ERR =    LOG_ERR,        /* error conditions */
                SYSLOG_WARNING =    LOG_WARNING,        /* warning conditions */
                SYSLOG_NOTICE = LOG_NOTICE,     /* normal but significant condition */
                SYSLOG_INFO =   LOG_INFO,       /* informational */
                SYSLOG_DEBUG =  LOG_DEBUG       /* debug-level messages */
        };

        std::ostream &operator<<(std::ostream &stream, const SyslogPriority &prio);

        class SyslogStream : public std::streambuf
        {
        private:
                enum { BUF_SIZE = 256 };

        public:
                SyslogStream();
                virtual ~SyslogStream();

                static std::ostream& getStream();
                static void open(char *name, int option, int facility);

                void setPriority(const SyslogPriority &prio);

        protected:
                virtual int sync();

        private:
                void writeToDevice();
                std::vector< char_type > m_buf;
                SyslogPriority _prio;
        };

        extern std::ostream &slog;
}

#endif  /* _SYSLOGSTREAM_H */