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
66  * struct ntfs_logging - Control info for the logging system
69  * @handler:	Function to perform the actual logging
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
283  * @handler:	function to perform the logging
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
302  * @function:	Function in which the log line occurred
307  * @format:	printf-style formatting string
310  * This is just a redirector function.  The arguments are simply passed to the
313  * Returns:  -1  Error occurred
317 int ntfs_log_redirect(const char *function, const char *file,  in ntfs_log_redirect()  argument
329 	ret = ntfs_log.handler(function, file, line, level, data, format, args);  in ntfs_log_redirect()
338  * ntfs_log_handler_syslog - syslog logging handler
339  * @function:	Function in which the log line occurred
344  * @format:	printf-style formatting string
349  * Returns:  -1  Error occurred
359 int ntfs_log_handler_syslog(const char *function  __attribute__((unused)),  in ntfs_log_handler_syslog()  argument
360 			    const char *file __attribute__((unused)),   in ntfs_log_handler_syslog()
361 			    int line __attribute__((unused)), u32 level,   in ntfs_log_handler_syslog()
362 			    void *data __attribute__((unused)),   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,
405 	openlog("ntfs-3g", LOG_PID, LOG_USER);  in ntfs_log_early_error()
416  * ntfs_log_handler_fprintf - Basic logging handler
417  * @function:	Function in which the log line occurred
422  * @format:	printf-style formatting string
432  * Returns:  -1  Error occurred
436 int ntfs_log_handler_fprintf(const char *function, const char *file,  in ntfs_log_handler_fprintf()  argument
453 			tab--;  in ntfs_log_handler_fprintf()
473 	if ((ntfs_log.flags & NTFS_LOG_FLAG_FUNCTION) || /* Source function */  in ntfs_log_handler_fprintf()
475 		ret += fprintf(stream, "%s(): ", function);  in ntfs_log_handler_fprintf()
492  * ntfs_log_handler_null - Null logging handler (no output)
493  * @function:	Function in which the log line occurred
498  * @format:	printf-style formatting string
506 int ntfs_log_handler_null(const char *function __attribute__((unused)), const char *file __attribut…  in ntfs_log_handler_null()  argument
507 …int line __attribute__((unused)), u32 level __attribute__((unused)), void *data __attribute__((unu…  in ntfs_log_handler_null()
508 	const char *format __attribute__((unused)), va_list args __attribute__((unused)))  in ntfs_log_handler_null()
514  * ntfs_log_handler_stdout - All logs go to stdout
515  * @function:	Function in which the log line occurred
520  * @format:	printf-style formatting string
528  * Note: This function calls ntfs_log_handler_fprintf to do the main work.
530  * Returns:  -1  Error occurred
534 int ntfs_log_handler_stdout(const char *function, const char *file,  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
545  * @function:	Function in which the log line occurred
550  * @format:	printf-style formatting string
557  *       If @data is NULL, the function ntfs_log_get_stream will be called
559  * Note: This function calls ntfs_log_handler_fprintf to do the main work.
561  * Returns:  -1  Error occurred
565 int ntfs_log_handler_outerr(const char *function, const char *file,  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
576  * @function:	Function in which the log line occurred
581  * @format:	printf-style formatting string
589  * Note: This function calls ntfs_log_handler_fprintf to do the main work.
591  * Returns:  -1  Error occurred
595 int ntfs_log_handler_stderr(const char *function, const char *file,  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()