7b98443a13
If opening the log file specified with the -l option failed (after closing all descriptors), the error message is written to an invalid descriptor as no log file or syslog is opened yet. Fix the code to track when the output is usable.
125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
/*
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Richard P. Curnow 1997-2002
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* Copyright (C) Miroslav Lichvar 2013-2015
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program 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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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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**********************************************************************
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=======================================================================
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Header file for diagnostic logging module
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*/
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#ifndef GOT_LOGGING_H
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#define GOT_LOGGING_H
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#include "sysincl.h"
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/* Flag indicating whether debug messages are logged */
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extern int log_debug_enabled;
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/* Line logging macros. If the compiler is GNU C, we take advantage of
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being able to get the function name also. */
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#ifdef __GNUC__
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#define FUNCTION_NAME __FUNCTION__
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#define FORMAT_ATTRIBUTE_PRINTF(str, first) __attribute__ ((format (printf, str, first)))
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#else
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#define FUNCTION_NAME ""
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#define FORMAT_ATTRIBUTE_PRINTF(str, first)
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#endif
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#if DEBUG > 0
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#define LOG_MESSAGE(severity, ...) \
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LOG_Message(severity, __LINE__, __FILE__, FUNCTION_NAME, __VA_ARGS__)
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#else
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#define LOG_MESSAGE(severity, ...) \
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LOG_Message(severity, __VA_ARGS__)
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#endif
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#define DEBUG_LOG(...) \
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do { \
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if (DEBUG && log_debug_enabled) \
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LOG_MESSAGE(LOGS_DEBUG, __VA_ARGS__); \
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} while (0)
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#define LOG_FATAL(...) \
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do { \
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LOG_MESSAGE(LOGS_FATAL, __VA_ARGS__); \
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exit(1); \
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} while (0)
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#define LOG(severity, ...) LOG_MESSAGE(severity, __VA_ARGS__)
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/* Definition of severity */
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typedef enum {
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LOGS_INFO,
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LOGS_WARN,
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LOGS_ERR,
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LOGS_FATAL,
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LOGS_DEBUG
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} LOG_Severity;
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/* Init function */
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extern void LOG_Initialise(void);
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/* Fini function */
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extern void LOG_Finalise(void);
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/* Line logging function */
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#if DEBUG > 0
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FORMAT_ATTRIBUTE_PRINTF(5, 6)
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extern void LOG_Message(LOG_Severity severity, int line_number, const char *filename,
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const char *function_name, const char *format, ...);
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#else
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FORMAT_ATTRIBUTE_PRINTF(2, 3)
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extern void LOG_Message(LOG_Severity severity, const char *format, ...);
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#endif
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/* Set debug level:
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0, 1 - only non-debug messages are logged
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2 - debug messages are logged too, all messages are prefixed with
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filename, line, and function name
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*/
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extern void LOG_SetDebugLevel(int level);
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/* Log messages to a file instead of stderr */
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extern void LOG_OpenFileLog(const char *log_file);
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/* Log messages to syslog instead of stderr */
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extern void LOG_OpenSystemLog(void);
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/* Stop using stderr and send fatal message to the foreground process */
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extern void LOG_SetParentFd(int fd);
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/* Close the pipe to the foreground process so it can exit */
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extern void LOG_CloseParentFd(void);
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/* File logging functions */
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typedef int LOG_FileID;
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extern LOG_FileID LOG_FileOpen(const char *name, const char *banner);
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FORMAT_ATTRIBUTE_PRINTF(2, 3)
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extern void LOG_FileWrite(LOG_FileID id, const char *format, ...);
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extern void LOG_CycleLogFiles(void);
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#endif /* GOT_LOGGING_H */
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