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//
// Copyright(c) 2015 Gabi Melman.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
//
#pragma once
#ifndef SPDLOG_H
#include "spdlog/spdlog.h"
#endif
#include "spdlog/sinks/base_sink.h"
#include <array>
#include <string>
#include <syslog.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.
*/
template<typename Mutex>
class syslog_sink : public base_sink<Mutex>
{
public:
//
explicit syslog_sink(std::string ident = "", int syslog_option = 0, int syslog_facility = LOG_USER)
: ident_(std::move(ident))
{
priorities_[static_cast<size_t>(level::trace)] = LOG_DEBUG;
priorities_[static_cast<size_t>(level::debug)] = LOG_DEBUG;
priorities_[static_cast<size_t>(level::info)] = LOG_INFO;
priorities_[static_cast<size_t>(level::warn)] = LOG_WARNING;
priorities_[static_cast<size_t>(level::err)] = LOG_ERR;
priorities_[static_cast<size_t>(level::critical)] = LOG_CRIT;
priorities_[static_cast<size_t>(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() override
{
::closelog();
}
syslog_sink(const syslog_sink &) = delete;
syslog_sink &operator=(const syslog_sink &) = delete;
protected:
void sink_it_(const details::log_msg &msg) override
{
::syslog(syslog_prio_from_level(msg), "%s", fmt::to_string(msg.payload).c_str());
}
void flush_() override {}
private:
std::array<int, 7> 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<size_t>(msg.level)];
}
};
using syslog_sink_mt = syslog_sink<std::mutex>;
using syslog_sink_st = syslog_sink<details::null_mutex>;
} // namespace sinks
// Create and register a syslog logger
template<typename Factory = default_factory>
inline std::shared_ptr<logger> syslog_logger_mt(
const std::string &logger_name, const std::string &syslog_ident = "", int syslog_option = 0, int syslog_facility = (1 << 3))
{
return Factory::template create<sinks::syslog_sink_mt>(logger_name, syslog_ident, syslog_option, syslog_facility);
}
template<typename Factory = default_factory>
inline std::shared_ptr<logger> syslog_logger_st(
const std::string &logger_name, const std::string &syslog_ident = "", int syslog_option = 0, int syslog_facility = (1 << 3))
{
return Factory::template create<sinks::syslog_sink_st>(logger_name, syslog_ident, syslog_option, syslog_facility);
}
} // namespace spdlog
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