/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ #pragma once /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdbool.h> #include <stdarg.h> #include <stdlib.h> #include <syslog.h> #include <sys/signalfd.h> #include <errno.h> #include "sd-id128.h" #include "macro.h" typedef enum LogTarget{ LOG_TARGET_CONSOLE, LOG_TARGET_CONSOLE_PREFIXED, LOG_TARGET_KMSG, LOG_TARGET_JOURNAL, LOG_TARGET_JOURNAL_OR_KMSG, LOG_TARGET_SYSLOG, LOG_TARGET_SYSLOG_OR_KMSG, LOG_TARGET_AUTO, /* console if stderr is tty, JOURNAL_OR_KMSG otherwise */ LOG_TARGET_SAFE, /* console if stderr is tty, KMSG otherwise */ LOG_TARGET_NULL, _LOG_TARGET_MAX, _LOG_TARGET_INVALID = -1 } LogTarget; void log_set_target(LogTarget target); void log_set_max_level(int level); void log_set_facility(int facility); int log_set_target_from_string(const char *e); int log_set_max_level_from_string(const char *e); void log_show_color(bool b); bool log_get_show_color(void) _pure_; void log_show_location(bool b); bool log_get_show_location(void) _pure_; int log_show_color_from_string(const char *e); int log_show_location_from_string(const char *e); LogTarget log_get_target(void) _pure_; int log_get_max_level(void) _pure_; int log_open(void); void log_close(void); void log_forget_fds(void); void log_close_syslog(void); void log_close_journal(void); void log_close_kmsg(void); void log_close_console(void); void log_parse_environment(void); int log_internal( int level, int error, const char *file, int line, const char *func, const char *format, ...) _printf_(6,7); int log_internalv( int level, int error, const char *file, int line, const char *func, const char *format, va_list ap) _printf_(6,0); int log_object_internal( int level, int error, const char *file, int line, const char *func, const char *object_field, const char *object, const char *format, ...) _printf_(8,9); int log_object_internalv( int level, int error, const char*file, int line, const char *func, const char *object_field, const char *object, const char *format, va_list ap) _printf_(8,0); int log_struct_internal( int level, int error, const char *file, int line, const char *func, const char *format, ...) _printf_(6,0) _sentinel_; int log_oom_internal( const char *file, int line, const char *func); /* This modifies the buffer passed! */ int log_dump_internal( int level, int error, const char *file, int line, const char *func, char *buffer); /* Logging for various assertions */ noreturn void log_assert_failed( const char *text, const char *file, int line, const char *func); noreturn void log_assert_failed_unreachable( const char *text, const char *file, int line, const char *func); void log_assert_failed_return( const char *text, const char *file, int line, const char *func); /* Logging with level */ #define log_full_errno(level, error, ...) \ ({ \ int _level = (level), _e = (error); \ (log_get_max_level() >= LOG_PRI(_level)) \ ? log_internal(_level, _e, __FILE__, __LINE__, __func__, __VA_ARGS__) \ : -abs(_e); \ }) #define log_full(level, ...) log_full_errno(level, 0, __VA_ARGS__) /* Normal logging */ #define log_debug(...) log_full(LOG_DEBUG, __VA_ARGS__) #define log_info(...) log_full(LOG_INFO, __VA_ARGS__) #define log_notice(...) log_full(LOG_NOTICE, __VA_ARGS__) #define log_warning(...) log_full(LOG_WARNING, __VA_ARGS__) #define log_error(...) log_full(LOG_ERR, __VA_ARGS__) #define log_emergency(...) log_full(getpid() == 1 ? LOG_EMERG : LOG_ERR, __VA_ARGS__) /* Logging triggered by an errno-like error */ #define log_debug_errno(error, ...) log_full_errno(LOG_DEBUG, error, __VA_ARGS__) #define log_info_errno(error, ...) log_full_errno(LOG_INFO, error, __VA_ARGS__) #define log_notice_errno(error, ...) log_full_errno(LOG_NOTICE, error, __VA_ARGS__) #define log_warning_errno(error, ...) log_full_errno(LOG_WARNING, error, __VA_ARGS__) #define log_error_errno(error, ...) log_full_errno(LOG_ERR, error, __VA_ARGS__) #define log_emergency_errno(error, ...) log_full_errno(getpid() == 1 ? LOG_EMERG : LOG_ERR, error, __VA_ARGS__) #ifdef LOG_TRACE # define log_trace(...) log_debug(__VA_ARGS__) #else # define log_trace(...) do {} while(0) #endif /* Structured logging */ #define log_struct(level, ...) log_struct_internal(level, 0, __FILE__, __LINE__, __func__, __VA_ARGS__) #define log_struct_errno(level, error, ...) log_struct_internal(level, error, __FILE__, __LINE__, __func__, __VA_ARGS__) /* This modifies the buffer passed! */ #define log_dump(level, buffer) log_dump_internal(level, 0, __FILE__, __LINE__, __func__, buffer) #define log_oom() log_oom_internal(__FILE__, __LINE__, __func__) bool log_on_console(void) _pure_; const char *log_target_to_string(LogTarget target) _const_; LogTarget log_target_from_string(const char *s) _pure_; /* Helpers to prepare various fields for structured logging */ #define LOG_MESSAGE(fmt, ...) "MESSAGE=" fmt, ##__VA_ARGS__ #define LOG_MESSAGE_ID(x) "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(x) void log_received_signal(int level, const struct signalfd_siginfo *si); void log_set_upgrade_syslog_to_journal(bool b); int log_syntax_internal( const char *unit, int level, const char *config_file, unsigned config_line, int error, const char *file, int line, const char *func, const char *format, ...) _printf_(9, 10); #define log_syntax(unit, level, config_file, config_line, error, ...) \ ({ \ int _level = (level), _e = (error); \ (log_get_max_level() >= LOG_PRI(_level)) \ ? log_syntax_internal(unit, _level, config_file, config_line, _e, __FILE__, __LINE__, __func__, __VA_ARGS__) \ : -abs(_e); \ })