Zbigniew Jędrzejewski-Szmek
ff524019ef
The single log level is split into an array of log levels. Which index in the array is used can be determined for each compilation unit separately by setting a macro before including log.h. All compilation units use the same index (LOG_REALM_SYSTEMD), so there should be no functional change. v2: - the "realm" is squished into the level (upper bits that are not used by priority or facility), and unsquished later in functions in log.c. v3: - rename REALM_PLUS_LEVEL to LOG_REALM_PLUS_LEVEL and REALM to LOG_REALM_REMOVE_LEVEL.
316 lines
11 KiB
C
316 lines
11 KiB
C
#pragma once
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <sys/signalfd.h>
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#include <sys/socket.h>
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#include <syslog.h>
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#include "sd-id128.h"
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#include "macro.h"
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typedef enum LogRealm {
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LOG_REALM_SYSTEMD,
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LOG_REALM_UDEV,
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_LOG_REALM_MAX,
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} LogRealm;
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#ifndef LOG_REALM
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# define LOG_REALM LOG_REALM_SYSTEMD
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#endif
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typedef enum LogTarget{
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LOG_TARGET_CONSOLE,
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LOG_TARGET_CONSOLE_PREFIXED,
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LOG_TARGET_KMSG,
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LOG_TARGET_JOURNAL,
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LOG_TARGET_JOURNAL_OR_KMSG,
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LOG_TARGET_SYSLOG,
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LOG_TARGET_SYSLOG_OR_KMSG,
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LOG_TARGET_AUTO, /* console if stderr is tty, JOURNAL_OR_KMSG otherwise */
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LOG_TARGET_SAFE, /* console if stderr is tty, KMSG otherwise */
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LOG_TARGET_NULL,
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_LOG_TARGET_MAX,
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_LOG_TARGET_INVALID = -1
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} LogTarget;
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#define LOG_REALM_PLUS_LEVEL(realm, level) \
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((realm) << 10 | (level))
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#define LOG_REALM_REMOVE_LEVEL(realm_level) \
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((realm_level >> 10))
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void log_set_target(LogTarget target);
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void log_set_max_level_realm(LogRealm realm, int level);
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#define log_set_max_level(level) \
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log_set_max_level_realm(LOG_REALM, (level))
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void log_set_facility(int facility);
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int log_set_target_from_string(const char *e);
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int log_set_max_level_from_string_realm(LogRealm realm, const char *e);
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#define log_set_max_level_from_string(e) \
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log_set_max_level_from_string_realm(LOG_REALM, (e))
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void log_show_color(bool b);
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bool log_get_show_color(void) _pure_;
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void log_show_location(bool b);
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bool log_get_show_location(void) _pure_;
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int log_show_color_from_string(const char *e);
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int log_show_location_from_string(const char *e);
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LogTarget log_get_target(void) _pure_;
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int log_get_max_level_realm(LogRealm realm) _pure_;
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#define log_get_max_level() \
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log_get_max_level_realm(LOG_REALM)
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int log_open(void);
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void log_close(void);
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void log_forget_fds(void);
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void log_close_syslog(void);
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void log_close_journal(void);
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void log_close_kmsg(void);
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void log_close_console(void);
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void log_parse_environment_realm(LogRealm realm);
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#define log_parse_environment() \
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log_parse_environment_realm(LOG_REALM)
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int log_dispatch_internal(
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int level,
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int error,
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const char *file,
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int line,
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const char *func,
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const char *object_field,
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const char *object,
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const char *extra,
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const char *extra_field,
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char *buffer);
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int log_internal_realm(
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int level,
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int error,
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const char *file,
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int line,
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const char *func,
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const char *format, ...) _printf_(6,7);
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#define log_internal(level, ...) \
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log_internal_realm(LOG_REALM_PLUS_LEVEL(LOG_REALM, (level)), __VA_ARGS__)
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int log_internalv_realm(
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int level,
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int error,
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const char *file,
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int line,
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const char *func,
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const char *format,
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va_list ap) _printf_(6,0);
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#define log_internalv(level, ...) \
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log_internalv_realm(LOG_REALM_PLUS_LEVEL(LOG_REALM, (level)), __VA_ARGS__)
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/* Realm is fixed to LOG_REALM_SYSTEMD for those */
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int log_object_internal(
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int level,
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int error,
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const char *file,
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int line,
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const char *func,
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const char *object_field,
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const char *object,
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const char *extra_field,
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const char *extra,
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const char *format, ...) _printf_(10,11);
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int log_object_internalv(
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int level,
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int error,
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const char *file,
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int line,
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const char *func,
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const char *object_field,
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const char *object,
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const char *extra_field,
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const char *extra,
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const char *format,
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va_list ap) _printf_(10,0);
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int log_struct_internal(
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int level,
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int error,
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const char *file,
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int line,
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const char *func,
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const char *format, ...) _printf_(6,0) _sentinel_;
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int log_oom_internal(
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LogRealm realm,
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const char *file,
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int line,
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const char *func);
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int log_format_iovec(
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struct iovec *iovec,
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unsigned iovec_len,
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unsigned *n,
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bool newline_separator,
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int error,
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const char *format,
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va_list ap) _printf_(6, 0);
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/* This modifies the buffer passed! */
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int log_dump_internal(
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int level,
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int error,
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const char *file,
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int line,
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const char *func,
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char *buffer);
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/* Logging for various assertions */
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noreturn void log_assert_failed_realm(
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LogRealm realm,
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const char *text,
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const char *file,
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int line,
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const char *func);
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#define log_assert_failed(text, ...) \
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log_assert_failed_realm(LOG_REALM, (text), __VA_ARGS__)
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noreturn void log_assert_failed_unreachable_realm(
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LogRealm realm,
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const char *text,
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const char *file,
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int line,
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const char *func);
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#define log_assert_failed_unreachable(text, ...) \
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log_assert_failed_unreachable_realm(LOG_REALM, (text), __VA_ARGS__)
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void log_assert_failed_return_realm(
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LogRealm realm,
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const char *text,
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const char *file,
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int line,
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const char *func);
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#define log_assert_failed_return(text, ...) \
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log_assert_failed_return_realm(LOG_REALM, (text), __VA_ARGS__)
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#define log_dispatch(level, error, buffer) \
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log_dispatch_internal(level, error, __FILE__, __LINE__, __func__, NULL, NULL, NULL, NULL, buffer)
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/* Logging with level */
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#define log_full_errno_realm(realm, level, error, ...) \
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({ \
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int _level = (level), _e = (error); \
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(log_get_max_level_realm((realm)) >= LOG_PRI(_level)) \
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? log_internal_realm(LOG_REALM_PLUS_LEVEL((realm), _level), _e, \
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__FILE__, __LINE__, __func__, __VA_ARGS__) \
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: -abs(_e); \
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})
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#define log_full_errno(level, error, ...) \
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log_full_errno_realm(LOG_REALM, (level), (error), __VA_ARGS__)
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#define log_full(level, ...) log_full_errno((level), 0, __VA_ARGS__)
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/* Normal logging */
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#define log_debug(...) log_full(LOG_DEBUG, __VA_ARGS__)
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#define log_info(...) log_full(LOG_INFO, __VA_ARGS__)
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#define log_notice(...) log_full(LOG_NOTICE, __VA_ARGS__)
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#define log_warning(...) log_full(LOG_WARNING, __VA_ARGS__)
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#define log_error(...) log_full(LOG_ERR, __VA_ARGS__)
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#define log_emergency(...) log_full(getpid() == 1 ? LOG_EMERG : LOG_ERR, __VA_ARGS__)
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/* Logging triggered by an errno-like error */
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#define log_debug_errno(error, ...) log_full_errno(LOG_DEBUG, error, __VA_ARGS__)
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#define log_info_errno(error, ...) log_full_errno(LOG_INFO, error, __VA_ARGS__)
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#define log_notice_errno(error, ...) log_full_errno(LOG_NOTICE, error, __VA_ARGS__)
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#define log_warning_errno(error, ...) log_full_errno(LOG_WARNING, error, __VA_ARGS__)
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#define log_error_errno(error, ...) log_full_errno(LOG_ERR, error, __VA_ARGS__)
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#define log_emergency_errno(error, ...) log_full_errno(getpid() == 1 ? LOG_EMERG : LOG_ERR, error, __VA_ARGS__)
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#ifdef LOG_TRACE
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# define log_trace(...) log_debug(__VA_ARGS__)
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#else
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# define log_trace(...) do {} while (0)
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#endif
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/* Structured logging */
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#define log_struct_errno(level, error, ...) \
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log_struct_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
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error, __FILE__, __LINE__, __func__, __VA_ARGS__)
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#define log_struct(level, ...) log_struct_errno(level, 0, __VA_ARGS__)
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/* This modifies the buffer passed! */
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#define log_dump(level, buffer) \
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log_dump_internal(LOG_REALM_PLUS_LEVEL(LOG_REALM, level), \
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0, __FILE__, __LINE__, __func__, buffer)
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#define log_oom() log_oom_internal(LOG_REALM, __FILE__, __LINE__, __func__)
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bool log_on_console(void) _pure_;
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const char *log_target_to_string(LogTarget target) _const_;
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LogTarget log_target_from_string(const char *s) _pure_;
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/* Helper to prepare various field for structured logging */
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#define LOG_MESSAGE(fmt, ...) "MESSAGE=" fmt, ##__VA_ARGS__
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void log_received_signal(int level, const struct signalfd_siginfo *si);
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void log_set_upgrade_syslog_to_journal(bool b);
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void log_set_always_reopen_console(bool b);
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int log_syntax_internal(
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const char *unit,
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int level,
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const char *config_file,
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unsigned config_line,
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int error,
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const char *file,
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int line,
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const char *func,
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const char *format, ...) _printf_(9, 10);
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#define log_syntax(unit, level, config_file, config_line, error, ...) \
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({ \
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int _level = (level), _e = (error); \
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(log_get_max_level() >= LOG_PRI(_level)) \
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? log_syntax_internal(unit, _level, config_file, config_line, _e, __FILE__, __LINE__, __func__, __VA_ARGS__) \
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: -abs(_e); \
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})
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#define log_syntax_invalid_utf8(unit, level, config_file, config_line, rvalue) \
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({ \
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int _level = (level); \
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if (log_get_max_level() >= LOG_PRI(_level)) { \
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_cleanup_free_ char *_p = NULL; \
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_p = utf8_escape_invalid(rvalue); \
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log_syntax_internal(unit, _level, config_file, config_line, 0, __FILE__, __LINE__, __func__, \
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"String is not UTF-8 clean, ignoring assignment: %s", strna(_p)); \
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} \
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})
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