/usr/include/spdlog/sinks/syslog_sink.h is in libspdlog-dev 1.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/* spdlog - an extremely fast and easy to use c++11 logging library. */
/* Copyright (c) 2014 Gabi Melman. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#pragma once
#ifdef __linux__
#include <array>
#include <string>
#include <syslog.h>
#include "./sink.h"
#include "../common.h"
#include "../details/log_msg.h"
namespace spdlog
{
namespace sinks
{
/**
* Sink that write to syslog using the `syscall()` library call.
*
* Locking is not needed, as `syslog()` itself is thread-safe.
*/
class syslog_sink : public sink
{
public:
//
syslog_sink(const std::string& ident = "", int syslog_option=0, int syslog_facility=LOG_USER):
_ident(ident)
{
_priorities[static_cast<int>(level::trace)] = LOG_DEBUG;
_priorities[static_cast<int>(level::debug)] = LOG_DEBUG;
_priorities[static_cast<int>(level::info)] = LOG_INFO;
_priorities[static_cast<int>(level::notice)] = LOG_NOTICE;
_priorities[static_cast<int>(level::warn)] = LOG_WARNING;
_priorities[static_cast<int>(level::err)] = LOG_ERR;
_priorities[static_cast<int>(level::critical)] = LOG_CRIT;
_priorities[static_cast<int>(level::alert)] = LOG_ALERT;
_priorities[static_cast<int>(level::emerg)] = LOG_EMERG;
_priorities[static_cast<int>(level::off)] = LOG_INFO;
//set ident to be program name if empty
::openlog(_ident.empty()? nullptr:_ident.c_str(), syslog_option, syslog_facility);
}
~syslog_sink()
{
::closelog();
}
syslog_sink(const syslog_sink&) = delete;
syslog_sink& operator=(const syslog_sink&) = delete;
void log(const details::log_msg &msg) override
{
::syslog(syslog_prio_from_level(msg), "%s", msg.formatted.str().c_str());
}
void flush() override
{
}
private:
std::array<int, 10> _priorities;
//must store the ident because the man says openlog might use the pointer as is and not a string copy
const std::string _ident;
//
// Simply maps spdlog's log level to syslog priority level.
//
int syslog_prio_from_level(const details::log_msg &msg) const
{
return _priorities[static_cast<int>(msg.level)];
}
};
}
}
#endif
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