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 void log_forget_fds(void);
99 void log_close_syslog(void);
100 void log_close_journal(void);
101 void log_close_kmsg(void);
102 void log_close_console(void);
104 void log_parse_environment_realm(LogRealm realm
);
105 #define log_parse_environment() \
106 log_parse_environment_realm(LOG_REALM)
108 int log_dispatch_internal(
114 const char *object_field
,
117 const char *extra_field
,
120 int log_internal_realm(
126 const char *format
, ...) _printf_(6,7);
127 #define log_internal(level, ...) \
128 log_internal_realm(LOG_REALM_PLUS_LEVEL(LOG_REALM, (level)), __VA_ARGS__)
130 int log_internalv_realm(
137 va_list ap
) _printf_(6,0);
138 #define log_internalv(level, ...) \
139 log_internalv_realm(LOG_REALM_PLUS_LEVEL(LOG_REALM, (level)), __VA_ARGS__)
141 /* Realm is fixed to LOG_REALM_SYSTEMD for those */
142 int log_object_internal(
148 const char *object_field
,
150 const char *extra_field
,
152 const char *format
, ...) _printf_(10,11);
154 int log_object_internalv(
160 const char *object_field
,
162 const char *extra_field
,
165 va_list ap
) _printf_(10,0);
167 int log_struct_internal(
173 const char *format
, ...) _printf_(6,0) _sentinel_
;
175 int log_oom_internal(
181 int log_format_iovec(
185 bool newline_separator
,
188 va_list ap
) _printf_(6, 0);
190 int log_struct_iovec_internal(
196 const struct iovec input_iovec
[],
197 size_t n_input_iovec
);
199 /* This modifies the buffer passed! */
200 int log_dump_internal(
208 /* Logging for various assertions */
209 noreturn
void log_assert_failed_realm(
215 #define log_assert_failed(text, ...) \
216 log_assert_failed_realm(LOG_REALM, (text), __VA_ARGS__)
218 noreturn
void log_assert_failed_unreachable_realm(
224 #define log_assert_failed_unreachable(text, ...) \
225 log_assert_failed_unreachable_realm(LOG_REALM, (text), __VA_ARGS__)
227 void log_assert_failed_return_realm(
233 #define log_assert_failed_return(text, ...) \
234 log_assert_failed_return_realm(LOG_REALM, (text), __VA_ARGS__)
236 #define log_dispatch(level, error, buffer) \
237 log_dispatch_internal(level, error, __FILE__, __LINE__, __func__, NULL, NULL, NULL, NULL, buffer)
239 /* Logging with level */
240 #define log_full_errno_realm(realm, level, error, ...) \
242 int _level = (level), _e = (error); \
243 (log_get_max_level_realm((realm)) >= LOG_PRI(_level)) \
244 ? log_internal_realm(LOG_REALM_PLUS_LEVEL((realm), _level), _e, \
245 __FILE__, __LINE__, __func__, __VA_ARGS__) \
249 #define log_full_errno(level, error, ...) \
250 log_full_errno_realm(LOG_REALM, (level), (error), __VA_ARGS__)
252 #define log_full(level, ...) log_full_errno((level), 0, __VA_ARGS__)
255 #define log_debug(...) log_full(LOG_DEBUG, __VA_ARGS__)
256 #define log_info(...) log_full(LOG_INFO, __VA_ARGS__)
257 #define log_notice(...) log_full(LOG_NOTICE, __VA_ARGS__)
258 #define log_warning(...) log_full(LOG_WARNING, __VA_ARGS__)
259 #define log_error(...) log_full(LOG_ERR, __VA_ARGS__)
260 #define log_emergency(...) log_full(getpid_cached() == 1 ? LOG_EMERG : LOG_ERR, __VA_ARGS__)
262 /* Logging triggered by an errno-like error */
263 #define log_debug_errno(error, ...) log_full_errno(LOG_DEBUG, error, __VA_ARGS__)
264 #define log_info_errno(error, ...) log_full_errno(LOG_INFO, error, __VA_ARGS__)
265 #define log_notice_errno(error, ...) log_full_errno(LOG_NOTICE, error, __VA_ARGS__)
266 #define log_warning_errno(error, ...) log_full_errno(LOG_WARNING, error, __VA_ARGS__)
267 #define log_error_errno(error, ...) log_full_errno(LOG_ERR, error, __VA_ARGS__)
268 #define log_emergency_errno(error, ...) log_full_errno(getpid_cached() == 1 ? LOG_EMERG : LOG_ERR, error, __VA_ARGS__)
271 # define log_trace(...) log_debug(__VA_ARGS__)
273 # define log_trace(...) do {} while (0)
276 /* Structured logging */
277 #define log_struct_errno(level, error, ...) \
278 log_struct_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
279 error, __FILE__, __LINE__, __func__, __VA_ARGS__)
280 #define log_struct(level, ...) log_struct_errno(level, 0, __VA_ARGS__)
282 #define log_struct_iovec_errno(level, error, iovec, n_iovec) \
283 log_struct_iovec_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
284 error, __FILE__, __LINE__, __func__, iovec, n_iovec)
285 #define log_struct_iovec(level, iovec, n_iovec) log_struct_iovec_errno(level, 0, iovec, n_iovec)
287 /* This modifies the buffer passed! */
288 #define log_dump(level, buffer) \
289 log_dump_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
290 0, __FILE__, __LINE__, __func__, buffer)
292 #define log_oom() log_oom_internal(LOG_REALM, __FILE__, __LINE__, __func__)
294 bool log_on_console(void) _pure_
;
296 const char *log_target_to_string(LogTarget target
) _const_
;
297 LogTarget
log_target_from_string(const char *s
) _pure_
;
299 /* Helper to prepare various field for structured logging */
300 #define LOG_MESSAGE(fmt, ...) "MESSAGE=" fmt, ##__VA_ARGS__
302 void log_received_signal(int level
, const struct signalfd_siginfo
*si
);
304 void log_set_upgrade_syslog_to_journal(bool b
);
305 void log_set_always_reopen_console(bool b
);
307 int log_syntax_internal(
310 const char *config_file
,
311 unsigned config_line
,
316 const char *format
, ...) _printf_(9, 10);
318 #define log_syntax(unit, level, config_file, config_line, error, ...) \
320 int _level = (level), _e = (error); \
321 (log_get_max_level() >= LOG_PRI(_level)) \
322 ? log_syntax_internal(unit, _level, config_file, config_line, _e, __FILE__, __LINE__, __func__, __VA_ARGS__) \
326 #define log_syntax_invalid_utf8(unit, level, config_file, config_line, rvalue) \
328 int _level = (level); \
329 if (log_get_max_level() >= LOG_PRI(_level)) { \
330 _cleanup_free_ char *_p = NULL; \
331 _p = utf8_escape_invalid(rvalue); \
332 log_syntax_internal(unit, _level, config_file, config_line, 0, __FILE__, __LINE__, __func__, \
333 "String is not UTF-8 clean, ignoring assignment: %s", strna(_p)); \