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26 * $Id: log.h,v 1.19 2004-11-16 17:08:11 heikki Exp $
31 * \brief Header for logging utility
38 #include <yaz/yconfig.h>
39 #include <yaz/xmalloc.h>
43 #define LOG_FATAL 0x00000001
44 #define LOG_DEBUG 0x00000002
45 #define LOG_WARN 0x00000004
46 #define LOG_LOG 0x00000008
47 #define LOG_ERRNO 0x00000010 /* append strerror to message */
48 #define LOG_FILE 0x00000020
49 #define LOG_APP 0x00000040 /* Application level events (new-connection) */
50 #define LOG_MALLOC 0x00000080 /* debugging mallocs */
51 #define LOG_NOTIME 0x00000100 /* do not output date and time */
52 #define LOG_APP2 0x00000200 /* Application-level events, such as api calls */
53 #define LOG_APP3 0x00000400 /* For more application-level events */
54 #define LOG_FLUSH 0x00000800 /* Flush log after every write (DEBUG does too) */
55 #define LOG_LOGLVL 0x00001000 /* log when modules query log levels */
56 /* this has to be a hard-coded bit, not to loop*/
58 #define LOG_ALL (0xffff&~LOG_MALLOC&~LOG_NOTIME)
60 #define LOG_DEFAULT_LEVEL (LOG_FATAL | LOG_ERRNO | LOG_LOG | LOG_WARN)
62 #define LOG_LAST_BIT LOG_LOGLVL /* the last bit used for regular log bits */
63 /* the rest are for dynamic modules */
68 * yaz_log_init is a shorthand for initializing the log level and prefixes */
69 YAZ_EXPORT void yaz_log_init(int level, const char *prefix, const char *name);
71 /** yaz_log_init_file sets the file name used for yaz_log */
72 YAZ_EXPORT void yaz_log_init_file(const char *fname);
74 /** yaz_log_init_level sets the logging level. Use an OR of the bits above */
75 YAZ_EXPORT void yaz_log_init_level(int level);
77 /** yaz_log_init_prefix sets the log prefix */
78 YAZ_EXPORT void yaz_log_init_prefix(const char *prefix);
80 /** yaz_log_init_prefix2 sets an optional second prefix */
81 YAZ_EXPORT void yaz_log_init_prefix2(const char *prefix);
84 * yaz_log_time_format sets the format of the timestamp. See man 3 strftime
85 * Calling with "old" sets to the old format "11:55:06-02/11"
86 * Calling with NULL or "" sets to the new format "20041102-115719"
87 * If not called at all, the old format is used, for backward compatibility
89 YAZ_EXPORT void yaz_log_time_format(const char *fmt);
92 * yaz_log_init_max_size sets the max size for a log file.
93 * zero means no limit. Negative means built-in limit (1GB)
95 YAZ_EXPORT void yaz_log_init_max_size(int mx);
98 * yaz_log writes an entry in the log. Defaults to stderr if not initialized
99 * to a file with yaz_log_init_file. The level must match the level set via
100 * yaz_log_init_level, optionally defined via yaz_log_mask_str. */
101 YAZ_EXPORT void yaz_log(int level, const char *fmt, ...)
103 __attribute__ ((format (printf, 2, 3)))
108 * yaz_log_mask_str converts a comma-separated list of log levels to a bit
109 * mask. Starts from default level, and adds bits as specified, unless 'none'
110 * is specified, which clears the list. If a name matches the name of a
111 * LOG_BIT above, that one is set. Otherwise a new value is picked, and given
112 * to that name, to be found with yaz_log_module_level */
113 YAZ_EXPORT int yaz_log_mask_str(const char *str);
115 /** yaz_log_mask_str_x is like yaz_log_mask_str, but with a given start value*/
116 YAZ_EXPORT int yaz_log_mask_str_x(const char *str, int level);
120 * yaz_log_module_level returns a log level mask corresponding to the module
121 * name. If that had been specified on the -v arguments (that is, passed to
122 * yaz_log_mask_str), then a non-zero mask is returned. If not, we get a
123 * zero. This can later be used in yaz_log for the level argument
125 YAZ_EXPORT int yaz_log_module_level(const char *name);
127 /** yaz_log_file returns the file handle for yaz_log. */
128 YAZ_EXPORT FILE *yaz_log_file(void);
130 YAZ_EXPORT void log_event_start(void (*func)(int level, const char *msg, void *info),
132 YAZ_EXPORT void log_event_end(void (*func)(int level, const char *msg, void *info),
135 YAZ_EXPORT void yaz_log_reopen(void);