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-rw-r--r--src/libbasic/log.h250
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diff --git a/src/libbasic/log.h b/src/libbasic/log.h
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+++ b/src/libbasic/log.h
@@ -0,0 +1,250 @@
+#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 <errno.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <sys/signalfd.h>
+#include <sys/socket.h>
+#include <syslog.h>
+
+#include <systemd/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);
+
+int log_format_iovec(
+ struct iovec *iovec,
+ unsigned iovec_len,
+ unsigned *n,
+ bool newline_separator,
+ int error,
+ const char *format,
+ va_list ap);
+
+/* 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); \
+ })
+
+#define log_syntax_invalid_utf8(unit, level, config_file, config_line, rvalue) \
+ ({ \
+ int _level = (level); \
+ if (log_get_max_level() >= LOG_PRI(_level)) { \
+ _cleanup_free_ char *_p = NULL; \
+ _p = utf8_escape_invalid(rvalue); \
+ log_syntax_internal(unit, _level, config_file, config_line, 0, __FILE__, __LINE__, __func__, \
+ "String is not UTF-8 clean, ignoring assignment: %s", strna(_p)); \
+ } \
+ -EINVAL; \
+ })
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