110 lines
3.6 KiB
C++
110 lines
3.6 KiB
C++
// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
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// Distributed under the MIT License (http://opensource.org/licenses/MIT)
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#pragma once
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#include <spdlog/sinks/base_sink.h>
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#include <spdlog/details/null_mutex.h>
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#include <spdlog/details/synchronous_factory.h>
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#include <array>
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#include <string>
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#include <syslog.h>
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namespace spdlog {
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namespace sinks {
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/**
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* Sink that write to syslog using the `syscall()` library call.
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*/
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template<typename Mutex>
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class syslog_sink : public base_sink<Mutex>
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{
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public:
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syslog_sink(std::string ident, int syslog_option, int syslog_facility, bool enable_formatting)
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: enable_formatting_{enable_formatting}
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, syslog_levels_{{/* spdlog::level::trace */ LOG_DEBUG,
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/* spdlog::level::debug */ LOG_DEBUG,
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/* spdlog::level::info */ LOG_INFO,
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/* spdlog::level::warn */ LOG_WARNING,
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/* spdlog::level::err */ LOG_ERR,
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/* spdlog::level::critical */ LOG_CRIT,
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/* spdlog::level::off */ LOG_INFO}}
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, ident_{std::move(ident)}
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{
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// set ident to be program name if empty
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::openlog(ident_.empty() ? nullptr : ident_.c_str(), syslog_option, syslog_facility);
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}
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~syslog_sink() override
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{
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::closelog();
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}
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syslog_sink(const syslog_sink &) = delete;
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syslog_sink &operator=(const syslog_sink &) = delete;
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protected:
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void sink_it_(const details::log_msg &msg) override
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{
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string_view_t payload;
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memory_buf_t formatted;
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if (enable_formatting_)
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{
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base_sink<Mutex>::formatter_->format(msg, formatted);
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payload = string_view_t(formatted.data(), formatted.size());
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}
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else
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{
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payload = msg.payload;
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}
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size_t length = payload.size();
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// limit to max int
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if (length > static_cast<size_t>(std::numeric_limits<int>::max()))
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{
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length = static_cast<size_t>(std::numeric_limits<int>::max());
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}
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::syslog(syslog_prio_from_level(msg), "%.*s", static_cast<int>(length), payload.data());
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}
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void flush_() override {}
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bool enable_formatting_ = false;
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private:
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using levels_array = std::array<int, 7>;
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levels_array syslog_levels_;
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// must store the ident because the man says openlog might use the pointer as
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// is and not a string copy
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const std::string ident_;
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//
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// Simply maps spdlog's log level to syslog priority level.
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//
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int syslog_prio_from_level(const details::log_msg &msg) const
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{
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return syslog_levels_.at(static_cast<levels_array::size_type>(msg.level));
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}
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};
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using syslog_sink_mt = syslog_sink<std::mutex>;
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using syslog_sink_st = syslog_sink<details::null_mutex>;
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} // namespace sinks
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// Create and register a syslog logger
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template<typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> syslog_logger_mt(const std::string &logger_name, const std::string &syslog_ident = "", int syslog_option = 0,
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int syslog_facility = LOG_USER, bool enable_formatting = false)
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{
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return Factory::template create<sinks::syslog_sink_mt>(logger_name, syslog_ident, syslog_option, syslog_facility, enable_formatting);
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}
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template<typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> syslog_logger_st(const std::string &logger_name, const std::string &syslog_ident = "", int syslog_option = 0,
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int syslog_facility = LOG_USER, bool enable_formatting = false)
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{
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return Factory::template create<sinks::syslog_sink_st>(logger_name, syslog_ident, syslog_option, syslog_facility, enable_formatting);
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}
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} // namespace spdlog
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