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/*
chronyd/chronyc - Programs for keeping computer clocks accurate.
**********************************************************************
* Copyright (C) Richard P. Curnow 1997-2002
* Copyright (C) Miroslav Lichvar 2013-2015
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
**********************************************************************
=======================================================================
Header file for diagnostic logging module
*/
#ifndef GOT_LOGGING_H
#define GOT_LOGGING_H
#include "sysincl.h"
/* Line logging macros. If the compiler is GNU C, we take advantage of
being able to get the function name also. */
#ifdef __GNUC__
#define FUNCTION_NAME __FUNCTION__
#define FORMAT_ATTRIBUTE_PRINTF(str, first) __attribute__ ((format (printf, str, first)))
#else
#define FUNCTION_NAME ""
#define FORMAT_ATTRIBUTE_PRINTF(str, first)
#endif
#if DEBUG > 0
#define LOG_MESSAGE(severity, ...) \
LOG_Message(severity, __LINE__, __FILE__, FUNCTION_NAME, __VA_ARGS__)
#else
#define LOG_MESSAGE(severity, ...) \
LOG_Message(severity, __VA_ARGS__)
#endif
#define DEBUG_LOG(...) \
do { \
if (DEBUG && log_min_severity == LOGS_DEBUG) \
LOG_MESSAGE(LOGS_DEBUG, __VA_ARGS__); \
} while (0)
#define LOG_FATAL(...) \
do { \
LOG_MESSAGE(LOGS_FATAL, __VA_ARGS__); \
exit(1); \
} while (0)
#define LOG(severity, ...) LOG_MESSAGE(severity, __VA_ARGS__)
/* Definition of severity */
typedef enum {
LOGS_DEBUG = -1,
LOGS_INFO = 0,
LOGS_WARN,
LOGS_ERR,
LOGS_FATAL,
} LOG_Severity;
/* Minimum severity of messages to be logged */
extern LOG_Severity log_min_severity;
/* Init function */
extern void LOG_Initialise(void);
/* Fini function */
extern void LOG_Finalise(void);
/* Line logging function */
#if DEBUG > 0
FORMAT_ATTRIBUTE_PRINTF(5, 6)
extern void LOG_Message(LOG_Severity severity, int line_number, const char *filename,
const char *function_name, const char *format, ...);
#else
FORMAT_ATTRIBUTE_PRINTF(2, 3)
extern void LOG_Message(LOG_Severity severity, const char *format, ...);
#endif
/* Set the minimum severity of a message to be logged or printed to terminal.
If the severity is LOGS_DEBUG and DEBUG is enabled, all messages will be
prefixed with the filename, line number, and function name. */
extern void LOG_SetMinSeverity(LOG_Severity severity);
/* Get the minimum severity */
extern LOG_Severity LOG_GetMinSeverity(void);
/* Flags for info messages that should be logged only in specific contexts */
typedef enum {
LOGC_Command = 1,
LOGC_SourceFile = 2,
} LOG_Context;
/* Modify current contexts */
extern void LOG_SetContext(LOG_Context context);
extern void LOG_UnsetContext(LOG_Context context);
/* Get severity depending on the current active contexts: INFO if they contain
at least one of the specified contexts, DEBUG otherwise */
extern LOG_Severity LOG_GetContextSeverity(LOG_Context contexts);
/* Set a prefix for debug messages */
extern void LOG_SetDebugPrefix(const char *prefix);
/* Log messages to a file instead of stderr, or stderr again if NULL */
extern void LOG_OpenFileLog(const char *log_file);
/* Log messages to syslog instead of stderr */
extern void LOG_OpenSystemLog(void);
/* Stop using stderr and send fatal message to the foreground process */
extern void LOG_SetParentFd(int fd);
/* Close the pipe to the foreground process so it can exit */
extern void LOG_CloseParentFd(void);
/* File logging functions */
typedef int LOG_FileID;
extern LOG_FileID LOG_FileOpen(const char *name, const char *banner);
FORMAT_ATTRIBUTE_PRINTF(2, 3)
extern void LOG_FileWrite(LOG_FileID id, const char *format, ...);
extern void LOG_CycleLogFiles(void);
#endif /* GOT_LOGGING_H */
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