94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
//
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// Copyright(c) 2015 Gabi Melman.
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// Distributed under the MIT License (http://opensource.org/licenses/MIT)
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//
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#pragma once
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#ifndef SPDLOG_H
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#include "spdlog/spdlog.h"
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#endif
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#include <syslog.h>
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#include <array>
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#include <string>
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#include "spdlog/sinks/base_sink.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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* Locking is not needed, as `syslog()` itself is thread-safe.
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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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public:
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//
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explicit syslog_sink(std::string ident = "", int syslog_option = 0,
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int syslog_facility = LOG_USER)
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: ident_(std::move(ident)) {
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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,
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syslog_facility);
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}
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~syslog_sink() override { ::closelog(); }
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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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::syslog(syslog_prio_from_level(msg), "%s",
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fmt::to_string(msg.payload).c_str());
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}
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void flush_() override {}
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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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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(
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const std::string &logger_name, const std::string &syslog_ident = "",
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int syslog_option = 0, int syslog_facility = (1 << 3)) {
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return Factory::template create<sinks::syslog_sink_mt>(
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logger_name, syslog_ident, syslog_option, syslog_facility);
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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(
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const std::string &logger_name, const std::string &syslog_ident = "",
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int syslog_option = 0, int syslog_facility = (1 << 3)) {
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return Factory::template create<sinks::syslog_sink_st>(
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logger_name, syslog_ident, syslog_option, syslog_facility);
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}
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} // namespace spdlog
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