1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2010 Lennart Poettering
17 /* Some structures we reference but don't want to pull in headers for */
19 struct signalfd_siginfo;
21 typedef enum LogRealm {
28 # define LOG_REALM LOG_REALM_SYSTEMD
31 typedef enum LogTarget{
33 LOG_TARGET_CONSOLE_PREFIXED,
36 LOG_TARGET_JOURNAL_OR_KMSG,
38 LOG_TARGET_SYSLOG_OR_KMSG,
39 LOG_TARGET_AUTO, /* console if stderr is tty, JOURNAL_OR_KMSG otherwise */
42 _LOG_TARGET_INVALID = -1
45 #define LOG_REALM_PLUS_LEVEL(realm, level) \
46 ((realm) << 10 | (level))
47 #define LOG_REALM_REMOVE_LEVEL(realm_level) \
50 void log_set_target(LogTarget target);
51 void log_set_max_level_realm(LogRealm realm, int level);
52 #define log_set_max_level(level) \
53 log_set_max_level_realm(LOG_REALM, (level))
55 void log_set_facility(int facility);
57 int log_set_target_from_string(const char *e);
58 int log_set_max_level_from_string_realm(LogRealm realm, const char *e);
59 #define log_set_max_level_from_string(e) \
60 log_set_max_level_from_string_realm(LOG_REALM, (e))
62 void log_show_color(bool b);
63 bool log_get_show_color(void) _pure_;
64 void log_show_location(bool b);
65 bool log_get_show_location(void) _pure_;
67 int log_show_color_from_string(const char *e);
68 int log_show_location_from_string(const char *e);
70 LogTarget log_get_target(void) _pure_;
71 int log_get_max_level_realm(LogRealm realm) _pure_;
72 #define log_get_max_level() \
73 log_get_max_level_realm(LOG_REALM)
75 /* Functions below that open and close logs or configure logging based on the
76 * environment should not be called from library code — this is always a job
77 * for the application itself.
82 #if 0 /// UNNEEDED by elogind
83 void log_forget_fds(void);
86 void log_parse_environment_realm(LogRealm realm);
87 #define log_parse_environment() \
88 log_parse_environment_realm(LOG_REALM)
90 int log_dispatch_internal(
96 const char *object_field,
99 const char *extra_field,
102 int log_internal_realm(
108 const char *format, ...) _printf_(6,7);
109 #define log_internal(level, ...) \
110 log_internal_realm(LOG_REALM_PLUS_LEVEL(LOG_REALM, (level)), __VA_ARGS__)
112 int log_internalv_realm(
119 va_list ap) _printf_(6,0);
120 #define log_internalv(level, ...) \
121 log_internalv_realm(LOG_REALM_PLUS_LEVEL(LOG_REALM, (level)), __VA_ARGS__)
123 /* Realm is fixed to LOG_REALM_SYSTEMD for those */
124 int log_object_internal(
130 const char *object_field,
132 const char *extra_field,
134 const char *format, ...) _printf_(10,11);
136 int log_struct_internal(
142 const char *format, ...) _printf_(6,0) _sentinel_;
144 int log_oom_internal(
150 int log_format_iovec(
154 bool newline_separator,
157 va_list ap) _printf_(6, 0);
159 int log_struct_iovec_internal(
165 const struct iovec *input_iovec,
166 size_t n_input_iovec);
168 /* This modifies the buffer passed! */
169 int log_dump_internal(
177 /* Logging for various assertions */
178 _noreturn_ void log_assert_failed_realm(
184 #define log_assert_failed(text, ...) \
185 log_assert_failed_realm(LOG_REALM, (text), __VA_ARGS__)
187 _noreturn_ void log_assert_failed_unreachable_realm(
193 #define log_assert_failed_unreachable(text, ...) \
194 log_assert_failed_unreachable_realm(LOG_REALM, (text), __VA_ARGS__)
196 void log_assert_failed_return_realm(
202 #define log_assert_failed_return(text, ...) \
203 log_assert_failed_return_realm(LOG_REALM, (text), __VA_ARGS__)
205 #define log_dispatch(level, error, buffer) \
206 log_dispatch_internal(level, error, __FILE__, __LINE__, __func__, NULL, NULL, NULL, NULL, buffer)
208 /* Logging with level */
209 #define log_full_errno_realm(realm, level, error, ...) \
211 int _level = (level), _e = (error), _realm = (realm); \
212 (log_get_max_level_realm(_realm) >= LOG_PRI(_level)) \
213 ? log_internal_realm(LOG_REALM_PLUS_LEVEL(_realm, _level), _e, \
214 __FILE__, __LINE__, __func__, __VA_ARGS__) \
218 #define log_full_errno(level, error, ...) \
219 log_full_errno_realm(LOG_REALM, (level), (error), __VA_ARGS__)
221 #define log_full(level, ...) log_full_errno((level), 0, __VA_ARGS__)
223 int log_emergency_level(void);
226 #define log_debug(...) log_full(LOG_DEBUG, __VA_ARGS__)
227 #define log_info(...) log_full(LOG_INFO, __VA_ARGS__)
228 #define log_notice(...) log_full(LOG_NOTICE, __VA_ARGS__)
229 #define log_warning(...) log_full(LOG_WARNING, __VA_ARGS__)
230 #define log_error(...) log_full(LOG_ERR, __VA_ARGS__)
231 #define log_emergency(...) log_full(log_emergency_level(), __VA_ARGS__)
233 /* Logging triggered by an errno-like error */
234 #define log_debug_errno(error, ...) log_full_errno(LOG_DEBUG, error, __VA_ARGS__)
235 #define log_info_errno(error, ...) log_full_errno(LOG_INFO, error, __VA_ARGS__)
236 #define log_notice_errno(error, ...) log_full_errno(LOG_NOTICE, error, __VA_ARGS__)
237 #define log_warning_errno(error, ...) log_full_errno(LOG_WARNING, error, __VA_ARGS__)
238 #define log_error_errno(error, ...) log_full_errno(LOG_ERR, error, __VA_ARGS__)
239 #define log_emergency_errno(error, ...) log_full_errno(log_emergency_level(), error, __VA_ARGS__)
242 # define log_trace(...) log_debug(__VA_ARGS__)
244 # define log_trace(...) do {} while (0)
247 #if ENABLE_DEBUG_ELOGIND
248 # define log_debug_elogind(...) log_debug(__VA_ARGS__);usleep(25*USEC_PER_MSEC)
250 # define log_debug_elogind(...) do {} while (0)
251 #endif // ENABLE_DEBUG_ELOGIND
252 /* Structured logging */
253 #define log_struct_errno(level, error, ...) \
254 log_struct_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
255 error, __FILE__, __LINE__, __func__, __VA_ARGS__)
256 error, __FILE__, __LINE__, __func__, __VA_ARGS__, NULL)
257 #define log_struct(level, ...) log_struct_errno(level, 0, __VA_ARGS__)
259 #define log_struct_iovec_errno(level, error, iovec, n_iovec) \
260 log_struct_iovec_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
261 error, __FILE__, __LINE__, __func__, iovec, n_iovec)
262 #define log_struct_iovec(level, iovec, n_iovec) log_struct_iovec_errno(level, 0, iovec, n_iovec)
264 /* This modifies the buffer passed! */
265 #define log_dump(level, buffer) \
266 log_dump_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
267 0, __FILE__, __LINE__, __func__, buffer)
269 #define log_oom() log_oom_internal(LOG_REALM, __FILE__, __LINE__, __func__)
271 bool log_on_console(void) _pure_;
273 const char *log_target_to_string(LogTarget target) _const_;
274 LogTarget log_target_from_string(const char *s) _pure_;
276 /* Helper to prepare various field for structured logging */
277 #define LOG_MESSAGE(fmt, ...) "MESSAGE=" fmt, ##__VA_ARGS__
279 #if 0 /// UNNEEDED by elogind
280 void log_received_signal(int level, const struct signalfd_siginfo *si);
282 /* If turned on, any requests for a log target involving "syslog" will be implicitly upgraded to the equivalent journal target */
283 void log_set_upgrade_syslog_to_journal(bool b);
285 /* If turned on, and log_open() is called, we'll not use STDERR_FILENO for logging ever, but rather open /dev/console */
286 void log_set_always_reopen_console(bool b);
289 /* If turned on, we'll open the log stream implicitly if needed on each individual log call. This is normally not
290 * desired as we want to reuse our logging streams. It is useful however */
291 void log_set_open_when_needed(bool b);
293 /* If turned on, then we'll never use IPC-based logging, i.e. never log to syslog or the journal. We'll only log to
294 * stderr, the console or kmsg */
295 void log_set_prohibit_ipc(bool b);
297 int log_dup_console(void);
299 int log_syntax_internal(
302 const char *config_file,
303 unsigned config_line,
308 const char *format, ...) _printf_(9, 10);
310 int log_syntax_invalid_utf8_internal(
313 const char *config_file,
314 unsigned config_line,
320 #define log_syntax(unit, level, config_file, config_line, error, ...) \
322 int _level = (level), _e = (error); \
323 (log_get_max_level() >= LOG_PRI(_level)) \
324 ? log_syntax_internal(unit, _level, config_file, config_line, _e, __FILE__, __LINE__, __func__, __VA_ARGS__) \
328 #define log_syntax_invalid_utf8(unit, level, config_file, config_line, rvalue) \
330 int _level = (level); \
331 (log_get_max_level() >= LOG_PRI(_level)) \
332 ? log_syntax_invalid_utf8_internal(unit, _level, config_file, config_line, __FILE__, __LINE__, __func__, rvalue) \
336 #define DEBUG_LOGGING _unlikely_(log_get_max_level() >= LOG_DEBUG)