103 lines
3.3 KiB
C++
103 lines
3.3 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 <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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, ident_{std::move(ident)}
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{
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priorities_[static_cast<size_t>(level::trace)] = LOG_DEBUG;
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priorities_[static_cast<size_t>(level::debug)] = LOG_DEBUG;
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priorities_[static_cast<size_t>(level::info)] = LOG_INFO;
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priorities_[static_cast<size_t>(level::warn)] = LOG_WARNING;
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priorities_[static_cast<size_t>(level::err)] = LOG_ERR;
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priorities_[static_cast<size_t>(level::critical)] = LOG_CRIT;
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priorities_[static_cast<size_t>(level::off)] = LOG_INFO;
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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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if (enable_formatting_)
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{
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fmt::memory_buffer formatted;
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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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::syslog(syslog_prio_from_level(msg), "%s", 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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std::array<int, 7> priorities_;
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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 priorities_[static_cast<size_t>(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 = default_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 = default_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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