1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2010 Lennart Poettering
9 systemd is free software; you can redistribute it and/or modify it
10 under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 2.1 of the License, or
12 (at your option) any later version.
14 systemd is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with systemd; If not, see <http://www.gnu.org/licenses/>.
30 /* Some structures we reference but don't want to pull in headers for */
32 struct signalfd_siginfo;
34 typedef enum LogRealm {
41 # define LOG_REALM LOG_REALM_SYSTEMD
44 typedef enum LogTarget{
46 LOG_TARGET_CONSOLE_PREFIXED,
49 LOG_TARGET_JOURNAL_OR_KMSG,
51 LOG_TARGET_SYSLOG_OR_KMSG,
52 LOG_TARGET_AUTO, /* console if stderr is tty, JOURNAL_OR_KMSG otherwise */
53 LOG_TARGET_SAFE, /* console if stderr is tty, KMSG otherwise */
56 _LOG_TARGET_INVALID = -1
59 #define LOG_REALM_PLUS_LEVEL(realm, level) \
60 ((realm) << 10 | (level))
61 #define LOG_REALM_REMOVE_LEVEL(realm_level) \
64 void log_set_target(LogTarget target);
65 void log_set_max_level_realm(LogRealm realm, int level);
66 #define log_set_max_level(level) \
67 log_set_max_level_realm(LOG_REALM, (level))
69 void log_set_facility(int facility);
71 int log_set_target_from_string(const char *e);
72 int log_set_max_level_from_string_realm(LogRealm realm, const char *e);
73 #define log_set_max_level_from_string(e) \
74 log_set_max_level_from_string_realm(LOG_REALM, (e))
76 void log_show_color(bool b);
77 bool log_get_show_color(void) _pure_;
78 void log_show_location(bool b);
79 bool log_get_show_location(void) _pure_;
81 int log_show_color_from_string(const char *e);
82 int log_show_location_from_string(const char *e);
84 LogTarget log_get_target(void) _pure_;
85 int log_get_max_level_realm(LogRealm realm) _pure_;
86 #define log_get_max_level() \
87 log_get_max_level_realm(LOG_REALM)
89 /* Functions below that open and close logs or configure logging based on the
90 * environment should not be called from library code — this is always a job
91 * for the application itself.
96 #if 0 /// UNNEEDED by elogind
97 void log_forget_fds(void);
100 void log_close_syslog(void);
101 void log_close_journal(void);
102 void log_close_kmsg(void);
103 void log_close_console(void);
105 void log_parse_environment_realm(LogRealm realm);
106 #define log_parse_environment() \
107 log_parse_environment_realm(LOG_REALM)
109 int log_dispatch_internal(
115 const char *object_field,
118 const char *extra_field,
121 int log_internal_realm(
127 const char *format, ...) _printf_(6,7);
128 #define log_internal(level, ...) \
129 log_internal_realm(LOG_REALM_PLUS_LEVEL(LOG_REALM, (level)), __VA_ARGS__)
131 int log_internalv_realm(
138 va_list ap) _printf_(6,0);
139 #define log_internalv(level, ...) \
140 log_internalv_realm(LOG_REALM_PLUS_LEVEL(LOG_REALM, (level)), __VA_ARGS__)
142 /* Realm is fixed to LOG_REALM_SYSTEMD for those */
143 int log_object_internal(
149 const char *object_field,
151 const char *extra_field,
153 const char *format, ...) _printf_(10,11);
155 int log_object_internalv(
161 const char *object_field,
163 const char *extra_field,
166 va_list ap) _printf_(10,0);
168 int log_struct_internal(
174 const char *format, ...) _printf_(6,0) _sentinel_;
176 int log_oom_internal(
182 int log_format_iovec(
186 bool newline_separator,
189 va_list ap) _printf_(6, 0);
191 int log_struct_iovec_internal(
197 const struct iovec *input_iovec,
198 size_t n_input_iovec);
200 /* This modifies the buffer passed! */
201 int log_dump_internal(
209 /* Logging for various assertions */
210 noreturn void log_assert_failed_realm(
216 #define log_assert_failed(text, ...) \
217 log_assert_failed_realm(LOG_REALM, (text), __VA_ARGS__)
219 noreturn void log_assert_failed_unreachable_realm(
225 #define log_assert_failed_unreachable(text, ...) \
226 log_assert_failed_unreachable_realm(LOG_REALM, (text), __VA_ARGS__)
228 void log_assert_failed_return_realm(
234 #define log_assert_failed_return(text, ...) \
235 log_assert_failed_return_realm(LOG_REALM, (text), __VA_ARGS__)
237 #define log_dispatch(level, error, buffer) \
238 log_dispatch_internal(level, error, __FILE__, __LINE__, __func__, NULL, NULL, NULL, NULL, buffer)
240 /* Logging with level */
241 #define log_full_errno_realm(realm, level, error, ...) \
243 int _level = (level), _e = (error), _realm = (realm); \
244 (log_get_max_level_realm(_realm) >= LOG_PRI(_level)) \
245 ? log_internal_realm(LOG_REALM_PLUS_LEVEL(_realm, _level), _e, \
246 __FILE__, __LINE__, __func__, __VA_ARGS__) \
250 #define log_full_errno(level, error, ...) \
251 log_full_errno_realm(LOG_REALM, (level), (error), __VA_ARGS__)
253 #define log_full(level, ...) log_full_errno((level), 0, __VA_ARGS__)
255 int log_emergency_level(void);
258 #define log_debug(...) log_full(LOG_DEBUG, __VA_ARGS__)
259 #define log_info(...) log_full(LOG_INFO, __VA_ARGS__)
260 #define log_notice(...) log_full(LOG_NOTICE, __VA_ARGS__)
261 #define log_warning(...) log_full(LOG_WARNING, __VA_ARGS__)
262 #define log_error(...) log_full(LOG_ERR, __VA_ARGS__)
263 #define log_emergency(...) log_full(log_emergency_level(), __VA_ARGS__)
265 /* Logging triggered by an errno-like error */
266 #define log_debug_errno(error, ...) log_full_errno(LOG_DEBUG, error, __VA_ARGS__)
267 #define log_info_errno(error, ...) log_full_errno(LOG_INFO, error, __VA_ARGS__)
268 #define log_notice_errno(error, ...) log_full_errno(LOG_NOTICE, error, __VA_ARGS__)
269 #define log_warning_errno(error, ...) log_full_errno(LOG_WARNING, error, __VA_ARGS__)
270 #define log_error_errno(error, ...) log_full_errno(LOG_ERR, error, __VA_ARGS__)
271 #define log_emergency_errno(error, ...) log_full_errno(log_emergency_level(), error, __VA_ARGS__)
274 # define log_trace(...) log_debug(__VA_ARGS__)
276 # define log_trace(...) do {} while (0)
279 #ifdef ENABLE_DEBUG_ELOGIND
280 # define log_debug_elogind(...) log_debug(__VA_ARGS__);usleep(25*USEC_PER_MSEC)
282 # define log_debug_elogind(...) do {} while (0)
283 #endif // ENABLE_DEBUG_ELOGIND
284 /* Structured logging */
285 #define log_struct_errno(level, error, ...) \
286 log_struct_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
287 error, __FILE__, __LINE__, __func__, __VA_ARGS__)
288 #define log_struct(level, ...) log_struct_errno(level, 0, __VA_ARGS__)
290 #define log_struct_iovec_errno(level, error, iovec, n_iovec) \
291 log_struct_iovec_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
292 error, __FILE__, __LINE__, __func__, iovec, n_iovec)
293 #define log_struct_iovec(level, iovec, n_iovec) log_struct_iovec_errno(level, 0, iovec, n_iovec)
295 /* This modifies the buffer passed! */
296 #define log_dump(level, buffer) \
297 log_dump_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
298 0, __FILE__, __LINE__, __func__, buffer)
300 #define log_oom() log_oom_internal(LOG_REALM, __FILE__, __LINE__, __func__)
302 bool log_on_console(void) _pure_;
304 const char *log_target_to_string(LogTarget target) _const_;
305 LogTarget log_target_from_string(const char *s) _pure_;
307 /* Helper to prepare various field for structured logging */
308 #define LOG_MESSAGE(fmt, ...) "MESSAGE=" fmt, ##__VA_ARGS__
310 #if 0 /// UNNEEDED by elogind
311 void log_received_signal(int level, const struct signalfd_siginfo *si);
313 void log_set_upgrade_syslog_to_journal(bool b);
314 void log_set_always_reopen_console(bool b);
316 void log_set_open_when_needed(bool b);
318 int log_syntax_internal(
321 const char *config_file,
322 unsigned config_line,
327 const char *format, ...) _printf_(9, 10);
329 int log_syntax_invalid_utf8_internal(
332 const char *config_file,
333 unsigned config_line,
339 #define log_syntax(unit, level, config_file, config_line, error, ...) \
341 int _level = (level), _e = (error); \
342 (log_get_max_level() >= LOG_PRI(_level)) \
343 ? log_syntax_internal(unit, _level, config_file, config_line, _e, __FILE__, __LINE__, __func__, __VA_ARGS__) \
347 #define log_syntax_invalid_utf8(unit, level, config_file, config_line, rvalue) \
349 int _level = (level); \
350 (log_get_max_level() >= LOG_PRI(_level)) \
351 ? log_syntax_invalid_utf8_internal(unit, _level, config_file, config_line, __FILE__, __LINE__, __func__, rvalue) \
355 #define DEBUG_LOGGING _unlikely_(log_get_max_level() >= LOG_DEBUG)