2  * logging.c - Centralised logging.  Originated from the Linux-NTFS project.
5  * Copyright (c) 2005-2008 Szabolcs Szakacsits
6  * Copyright (c) 2010      Jean-Pierre Andre
19  * along with this program (in the main directory of the NTFS-3G
21  * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
62 # define  BROKEN_GCC_FORMAT_ATTRIBUTE __attribute__((format(printf, 6, 0)))
66  * struct ntfs_logging - Control info for the logging system
99  * ntfs_log_get_levels - Get a list of the current logging levels
103  * Returns:  Log levels in a 32-bit field
111  * ntfs_log_set_levels - Enable extra logging levels
112  * @levels:	32-bit field of log levels to set
128  * ntfs_log_clear_levels - Disable some logging levels
129  * @levels:	32-bit field of log levels to clear
146  * ntfs_log_get_flags - Get a list of logging style flags
150  * Returns:  Logging flags in a 32-bit field
158  * ntfs_log_set_flags - Enable extra logging style flags
159  * @flags:	32-bit field of logging flags to set
175  * ntfs_log_clear_flags - Disable some logging styles
176  * @flags:	32-bit field of logging flags to clear
193  * ntfs_log_get_stream - Default output streams for logging levels
230  * ntfs_log_get_prefix - Default prefixes for logging levels
282  * ntfs_log_set_handler - Provide an alternate logging handler
294 			openlog("ntfs-3g", LOG_PID, LOG_USER);  in ntfs_log_set_handler()
301  * ntfs_log_redirect - Pass on the request to the real handler
307  * @format:	printf-style formatting string
313  * Returns:  -1  Error occurred
318 	int line, u32 level, void *data, const char *format, ...)  in ntfs_log_redirect()  argument
322 	va_list args;  in ntfs_log_redirect()  local
327 	va_start(args, format);  in ntfs_log_redirect()
329 	ret = ntfs_log.handler(function, file, line, level, data, format, args);  in ntfs_log_redirect()
330 	va_end(args);  in ntfs_log_redirect()
338  * ntfs_log_handler_syslog - syslog logging handler
344  * @format:	printf-style formatting string
345  * @args:	Arguments to be formatted
349  * Returns:  -1  Error occurred
363 			    const char *format, va_list args)  in ntfs_log_handler_syslog()  argument
372 	ret = vsnprintf(logbuf, LOG_LINE_LEN, format, args);  in ntfs_log_handler_syslog()
374 		vsyslog(LOG_NOTICE, format, args);  in ntfs_log_handler_syslog()
380 		strncat(logbuf, ": ", LOG_LINE_LEN - ret - 1);  in ntfs_log_handler_syslog()
381 		strncat(logbuf, strerror(olderr), LOG_LINE_LEN - (ret + 3));  in ntfs_log_handler_syslog()
395  *	(not quite satisfactory : this appears before the ntfs-g banner,
399 void ntfs_log_early_error(const char *format, ...)  in ntfs_log_early_error()  argument
401 	va_list args;  in ntfs_log_early_error()  local
403 	va_start(args, format);  in ntfs_log_early_error()
405 	openlog("ntfs-3g", LOG_PID, LOG_USER);  in ntfs_log_early_error()
408 		format, args);  in ntfs_log_early_error()
410 	vfprintf(stderr,format,args);  in ntfs_log_early_error()
412 	va_end(args);  in ntfs_log_early_error()
416  * ntfs_log_handler_fprintf - Basic logging handler
422  * @format:	printf-style formatting string
423  * @args:	Arguments to be formatted
432  * Returns:  -1  Error occurred
437 	int line, u32 level, void *data, const char *format, va_list args)  in ntfs_log_handler_fprintf()  argument
453 			tab--;  in ntfs_log_handler_fprintf()
477 	ret += vfprintf(stream, format, args);  in ntfs_log_handler_fprintf()
492  * ntfs_log_handler_null - Null logging handler (no output)
498  * @format:	printf-style formatting string
499  * @args:	Arguments to be formatted
508 	const char *format __attribute__((unused)), va_list args __attribute__((unused)))  in ntfs_log_handler_null()  argument
514  * ntfs_log_handler_stdout - All logs go to stdout
520  * @format:	printf-style formatting string
521  * @args:	Arguments to be formatted
530  * Returns:  -1  Error occurred
535 	int line, u32 level, void *data, const char *format, va_list args)  in ntfs_log_handler_stdout()  argument
540 	return ntfs_log_handler_fprintf(function, file, line, level, data, format, args);  in ntfs_log_handler_stdout()
544  * ntfs_log_handler_outerr - Logs go to stdout/stderr depending on level
550  * @format:	printf-style formatting string
551  * @args:	Arguments to be formatted
561  * Returns:  -1  Error occurred
566 	int line, u32 level, void *data, const char *format, va_list args)  in ntfs_log_handler_outerr()  argument
571 	return ntfs_log_handler_fprintf(function, file, line, level, data, format, args);  in ntfs_log_handler_outerr()
575  * ntfs_log_handler_stderr - All logs go to stderr
581  * @format:	printf-style formatting string
582  * @args:	Arguments to be formatted
591  * Returns:  -1  Error occurred
596 	int line, u32 level, void *data, const char *format, va_list args)  in ntfs_log_handler_stderr()  argument
601 	return ntfs_log_handler_fprintf(function, file, line, level, data, format, args);  in ntfs_log_handler_stderr()
606  * ntfs_log_parse_option - Act upon command line options
610  * with "--log-".  Options cause log levels to be enabled in @ntfs_log (the
620 	if (strcmp(option, "--log-debug") == 0) {  in ntfs_log_parse_option()
623 	} else if (strcmp(option, "--log-verbose") == 0) {  in ntfs_log_parse_option()
626 	} else if (strcmp(option, "--log-quiet") == 0) {  in ntfs_log_parse_option()
629 	} else if (strcmp(option, "--log-trace") == 0) {  in ntfs_log_parse_option()