1 //
2 // Copyright(c) 2015 Gabi Melman.
3 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
4 //
5
6 #pragma once
7
8 #include "spdlog/sinks/base_sink.h"
9 #include "spdlog/spdlog.h"
10
11 #include <array>
12 #include <string>
13 #include <syslog.h>
14
15 namespace spdlog {
16 namespace sinks {
17 /**
18 * Sink that write to syslog using the `syscall()` library call.
19 *
20 * Locking is not needed, as `syslog()` itself is thread-safe.
21 */
22 template<typename Mutex>
23 class syslog_sink : public base_sink<Mutex>
24 {
25 public:
26 //
syslog_sink(std::string ident = �, int syslog_option = 0, int syslog_facility = LOG_USER)27 explicit syslog_sink(std::string ident = "", int syslog_option = 0, int syslog_facility = LOG_USER)
28 : ident_(std::move(ident))
29 {
30 priorities_[static_cast<size_t>(level::trace)] = LOG_DEBUG;
31 priorities_[static_cast<size_t>(level::debug)] = LOG_DEBUG;
32 priorities_[static_cast<size_t>(level::info)] = LOG_INFO;
33 priorities_[static_cast<size_t>(level::warn)] = LOG_WARNING;
34 priorities_[static_cast<size_t>(level::err)] = LOG_ERR;
35 priorities_[static_cast<size_t>(level::critical)] = LOG_CRIT;
36 priorities_[static_cast<size_t>(level::off)] = LOG_INFO;
37
38 // set ident to be program name if empty
39 ::openlog(ident_.empty() ? nullptr : ident_.c_str(), syslog_option, syslog_facility);
40 }
41
42 ~syslog_sink() override
43 {
44 ::closelog();
45 }
46
47 syslog_sink(const syslog_sink &) = delete;
48 syslog_sink &operator=(const syslog_sink &) = delete;
49
50 protected:
51 void sink_it_(const details::log_msg &msg) override
52 {
53 ::syslog(syslog_prio_from_level(msg), "%s", fmt::to_string(msg.raw).c_str());
54 }
55
56 void flush_() override {}
57
58 private:
59 std::array<int, 7> priorities_;
60 // must store the ident because the man says openlog might use the pointer as
61 // is and not a string copy
62 const std::string ident_;
63
64 //
65 // Simply maps spdlog's log level to syslog priority level.
66 //
syslog_prio_from_level(const details::log_msg &msg) const67 int syslog_prio_from_level(const details::log_msg &msg) const
68 {
69 return priorities_[static_cast<size_t>(msg.level)];
70 }
71 };
72
73 using syslog_sink_mt = syslog_sink<std::mutex>;
74 using syslog_sink_st = syslog_sink<details::null_mutex>;
75 } // namespace sinks
76
77 // Create and register a syslog logger
78 template<typename Factory = default_factory>
syslog_logger_mt( const std::string &logger_name, const std::string &syslog_ident = �, int syslog_option = 0, int syslog_facility = (1 << 3))79 inline std::shared_ptr<logger> syslog_logger_mt(
80 const std::string &logger_name, const std::string &syslog_ident = "", int syslog_option = 0, int syslog_facility = (1 << 3))
81 {
82 return Factory::template create<sinks::syslog_sink_mt>(logger_name, syslog_ident, syslog_option, syslog_facility);
83 }
84
85 template<typename Factory = default_factory>
syslog_logger_st( const std::string &logger_name, const std::string &syslog_ident = �, int syslog_option = 0, int syslog_facility = (1 << 3))86 inline std::shared_ptr<logger> syslog_logger_st(
87 const std::string &logger_name, const std::string &syslog_ident = "", int syslog_option = 0, int syslog_facility = (1 << 3))
88 {
89 return Factory::template create<sinks::syslog_sink_st>(logger_name, syslog_ident, syslog_option, syslog_facility);
90 }
91 } // namespace spdlog
92