4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/signalfd.h>
27 #include <sys/socket.h>
33 #include "process-util.h"
35 typedef enum LogRealm {
42 # define LOG_REALM LOG_REALM_SYSTEMD
45 typedef enum LogTarget{
47 LOG_TARGET_CONSOLE_PREFIXED,
50 LOG_TARGET_JOURNAL_OR_KMSG,
52 LOG_TARGET_SYSLOG_OR_KMSG,
53 LOG_TARGET_AUTO, /* console if stderr is tty, JOURNAL_OR_KMSG otherwise */
54 LOG_TARGET_SAFE, /* console if stderr is tty, KMSG otherwise */
57 _LOG_TARGET_INVALID = -1
60 #define LOG_REALM_PLUS_LEVEL(realm, level) \
61 ((realm) << 10 | (level))
62 #define LOG_REALM_REMOVE_LEVEL(realm_level) \
65 void log_set_target(LogTarget target);
66 void log_set_max_level_realm(LogRealm realm, int level);
67 #define log_set_max_level(level) \
68 log_set_max_level_realm(LOG_REALM, (level))
70 void log_set_facility(int facility);
72 int log_set_target_from_string(const char *e);
73 int log_set_max_level_from_string_realm(LogRealm realm, const char *e);
74 #define log_set_max_level_from_string(e) \
75 log_set_max_level_from_string_realm(LOG_REALM, (e))
77 void log_show_color(bool b);
78 bool log_get_show_color(void) _pure_;
79 void log_show_location(bool b);
80 bool log_get_show_location(void) _pure_;
82 int log_show_color_from_string(const char *e);
83 int log_show_location_from_string(const char *e);
85 LogTarget log_get_target(void) _pure_;
86 int log_get_max_level_realm(LogRealm realm) _pure_;
87 #define log_get_max_level() \
88 log_get_max_level_realm(LOG_REALM)
90 /* Functions below that open and close logs or configure logging based on the
91 * environment should not be called from library code — this is always a job
92 * for the application itself.
97 #if 0 /// UNNEEDED by elogind
98 void log_forget_fds(void);
101 void log_close_syslog(void);
102 void log_close_journal(void);
103 void log_close_kmsg(void);
104 void log_close_console(void);
106 void log_parse_environment_realm(LogRealm realm);
107 #define log_parse_environment() \
108 log_parse_environment_realm(LOG_REALM)
110 int log_dispatch_internal(
116 const char *object_field,
119 const char *extra_field,
122 int log_internal_realm(
128 const char *format, ...) _printf_(6,7);
129 #define log_internal(level, ...) \
130 log_internal_realm(LOG_REALM_PLUS_LEVEL(LOG_REALM, (level)), __VA_ARGS__)
132 int log_internalv_realm(
139 va_list ap) _printf_(6,0);
140 #define log_internalv(level, ...) \
141 log_internalv_realm(LOG_REALM_PLUS_LEVEL(LOG_REALM, (level)), __VA_ARGS__)
143 /* Realm is fixed to LOG_REALM_SYSTEMD for those */
144 int log_object_internal(
150 const char *object_field,
152 const char *extra_field,
154 const char *format, ...) _printf_(10,11);
156 int log_object_internalv(
162 const char *object_field,
164 const char *extra_field,
167 va_list ap) _printf_(10,0);
169 int log_struct_internal(
175 const char *format, ...) _printf_(6,0) _sentinel_;
177 int log_oom_internal(
183 int log_format_iovec(
187 bool newline_separator,
190 va_list ap) _printf_(6, 0);
192 int log_struct_iovec_internal(
198 const struct iovec input_iovec[],
199 size_t n_input_iovec);
201 /* This modifies the buffer passed! */
202 int log_dump_internal(
210 /* Logging for various assertions */
211 noreturn void log_assert_failed_realm(
217 #define log_assert_failed(text, ...) \
218 log_assert_failed_realm(LOG_REALM, (text), __VA_ARGS__)
220 noreturn void log_assert_failed_unreachable_realm(
226 #define log_assert_failed_unreachable(text, ...) \
227 log_assert_failed_unreachable_realm(LOG_REALM, (text), __VA_ARGS__)
229 void log_assert_failed_return_realm(
235 #define log_assert_failed_return(text, ...) \
236 log_assert_failed_return_realm(LOG_REALM, (text), __VA_ARGS__)
238 #define log_dispatch(level, error, buffer) \
239 log_dispatch_internal(level, error, __FILE__, __LINE__, __func__, NULL, NULL, NULL, NULL, buffer)
241 /* Logging with level */
242 #define log_full_errno_realm(realm, level, error, ...) \
244 int _level = (level), _e = (error); \
245 (log_get_max_level_realm((realm)) >= LOG_PRI(_level)) \
246 ? log_internal_realm(LOG_REALM_PLUS_LEVEL((realm), _level), _e, \
247 __FILE__, __LINE__, __func__, __VA_ARGS__) \
251 #define log_full_errno(level, error, ...) \
252 log_full_errno_realm(LOG_REALM, (level), (error), __VA_ARGS__)
254 #define log_full(level, ...) log_full_errno((level), 0, __VA_ARGS__)
257 #define log_debug(...) log_full(LOG_DEBUG, __VA_ARGS__)
258 #define log_info(...) log_full(LOG_INFO, __VA_ARGS__)
259 #define log_notice(...) log_full(LOG_NOTICE, __VA_ARGS__)
260 #define log_warning(...) log_full(LOG_WARNING, __VA_ARGS__)
261 #define log_error(...) log_full(LOG_ERR, __VA_ARGS__)
262 #define log_emergency(...) log_full(getpid_cached() == 1 ? LOG_EMERG : LOG_ERR, __VA_ARGS__)
264 /* Logging triggered by an errno-like error */
265 #define log_debug_errno(error, ...) log_full_errno(LOG_DEBUG, error, __VA_ARGS__)
266 #define log_info_errno(error, ...) log_full_errno(LOG_INFO, error, __VA_ARGS__)
267 #define log_notice_errno(error, ...) log_full_errno(LOG_NOTICE, error, __VA_ARGS__)
268 #define log_warning_errno(error, ...) log_full_errno(LOG_WARNING, error, __VA_ARGS__)
269 #define log_error_errno(error, ...) log_full_errno(LOG_ERR, error, __VA_ARGS__)
270 #define log_emergency_errno(error, ...) log_full_errno(getpid_cached() == 1 ? LOG_EMERG : LOG_ERR, error, __VA_ARGS__)
273 # define log_trace(...) log_debug(__VA_ARGS__)
275 # define log_trace(...) do {} while (0)
278 #ifdef ENABLE_DEBUG_ELOGIND
279 # define log_debug_elogind(...) log_debug(__VA_ARGS__);usleep(25*USEC_PER_MSEC)
281 # define log_debug_elogind(...) do {} while (0)
282 #endif // ENABLE_DEBUG_ELOGIND
283 /* Structured logging */
284 #define log_struct_errno(level, error, ...) \
285 log_struct_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
286 error, __FILE__, __LINE__, __func__, __VA_ARGS__)
287 #define log_struct(level, ...) log_struct_errno(level, 0, __VA_ARGS__)
289 #define log_struct_iovec_errno(level, error, iovec, n_iovec) \
290 log_struct_iovec_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
291 error, __FILE__, __LINE__, __func__, iovec, n_iovec)
292 #define log_struct_iovec(level, iovec, n_iovec) log_struct_iovec_errno(level, 0, iovec, n_iovec)
294 /* This modifies the buffer passed! */
295 #define log_dump(level, buffer) \
296 log_dump_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
297 0, __FILE__, __LINE__, __func__, buffer)
299 #define log_oom() log_oom_internal(LOG_REALM, __FILE__, __LINE__, __func__)
301 bool log_on_console(void) _pure_;
303 const char *log_target_to_string(LogTarget target) _const_;
304 LogTarget log_target_from_string(const char *s) _pure_;
306 /* Helper to prepare various field for structured logging */
307 #define LOG_MESSAGE(fmt, ...) "MESSAGE=" fmt, ##__VA_ARGS__
309 #if 0 /// UNNEEDED by elogind
310 void log_received_signal(int level, const struct signalfd_siginfo *si);
312 void log_set_upgrade_syslog_to_journal(bool b);
313 void log_set_always_reopen_console(bool b);
315 void log_set_open_when_needed(bool b);
317 int log_syntax_internal(
320 const char *config_file,
321 unsigned config_line,
326 const char *format, ...) _printf_(9, 10);
328 #define log_syntax(unit, level, config_file, config_line, error, ...) \
330 int _level = (level), _e = (error); \
331 (log_get_max_level() >= LOG_PRI(_level)) \
332 ? log_syntax_internal(unit, _level, config_file, config_line, _e, __FILE__, __LINE__, __func__, __VA_ARGS__) \
336 #define log_syntax_invalid_utf8(unit, level, config_file, config_line, rvalue) \
338 int _level = (level); \
339 if (log_get_max_level() >= LOG_PRI(_level)) { \
340 _cleanup_free_ char *_p = NULL; \
341 _p = utf8_escape_invalid(rvalue); \
342 log_syntax_internal(unit, _level, config_file, config_line, 0, __FILE__, __LINE__, __func__, \
343 "String is not UTF-8 clean, ignoring assignment: %s", strna(_p)); \