1 files changed, 94 insertions, 0 deletions
diff --git a/matching/include/spdlog/sinks/syslog_sink.h b/matching/include/spdlog/sinks/syslog_sink.h
new file mode 100644
index 0000000..c3bcd84
--- /dev/null
+++ b/matching/include/spdlog/sinks/syslog_sink.h
@@ -0,0 +1,94 @@
+//
+// 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