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- /* Copyright 2001,2002,2003 Roger Dingledine, Matej Pfajfar. */
- /* See LICENSE for licensing information */
- /* $Id$ */
- /**
- * /file log.h
- *
- * /brief Headers for logging functions.
- **/
- #ifndef __LOG_H
- /**
- * \file log.h
- * \brief Headers for log.c
- */
- #include "../common/compat.h"
- #ifdef HAVE_SYSLOG_H
- #include <syslog.h>
- #define LOG_WARN LOG_WARNING
- #if LOG_DEBUG < LOG_ERR
- #error "Your syslog.h thinks high numbers are more important. We aren't prepared to deal with that."
- #endif
- #else
- /* XXXX Note: The code was originally written to refer to severities,
- * with 0 being the least severe; while syslog's logging code refers to
- * priorities, with 0 being the most important. Thus, all our comparisons
- * needed to be reversed when we added syslog support.
- *
- * The upshot of this is that comments about log levels may be messed
- * up: for "maximum severity" read "most severe" and "numerically
- * *lowest* severity".
- */
- /** Debug-level severity: for hyper-verbose messages of no interest to
- * anybody but developers. */
- #define LOG_DEBUG 7
- /** Info-level severity: for messages that appear frequently during normal
- * operation. */
- #define LOG_INFO 6
- /** Notice-level severity: for messages that appear infrequently
- * during normal operation; that the user will probably care about;
- * and that are not errors.
- */
- #define LOG_NOTICE 5
- /** Warn-level severity: for messages that only appear when something has gone
- * wrong. */
- #define LOG_WARN 4
- /** Error-level severity: for messages that only appear when something has gone
- * very wrong, and the Tor process can no longer proceed. */
- #define LOG_ERR 3
- #endif
- typedef void (*log_callback)(int severity, const char *msg);
- int parse_log_level(const char *level);
- const char *log_level_to_string(int level);
- void add_stream_log(int severityMin, int severityMax, const char *name, FILE *stream);
- int add_file_log(int severityMin, int severityMax, const char *filename);
- #ifdef HAVE_SYSLOG_H
- int add_syslog_log(int loglevelMin, int loglevelMax);
- #endif
- int add_callback_log(int loglevelMin, int loglevelMax, log_callback cb);
- int get_min_log_level(void);
- void switch_logs_debug(void);
- void close_logs(void);
- void reset_logs(void);
- void add_temp_log(void);
- void close_temp_logs(void);
- void mark_logs_temp(void);
- /* Outputs a message to stdout */
- void _log(int severity, const char *format, ...) CHECK_PRINTF(2,3);
- #ifdef __GNUC__
- void _log_fn(int severity, const char *funcname, const char *format, ...)
- CHECK_PRINTF(3,4);
- /** Log a message at level <b>severity</b>, using a pretty-printed version
- * of the current function name. */
- #define log_fn(severity, args...) \
- _log_fn(severity, __PRETTY_FUNCTION__, args)
- #elif defined(_MSC_VER) && _MSC_VER < 1300
- /* MSVC 6 and earlier don't have __FUNCTION__, or even __LINE__. */
- #define log_fn _log
- #else
- /* We don't have GCC's varargs macros, so use a global variable to pass the
- * function name to log_fn */
- extern const char *_log_fn_function_name;
- void _log_fn(int severity, const char *format, ...);
- /* We abuse the comma operator here, since we can't use the standard
- * do {...} while(0) trick to wrap this macro, since the macro can't take
- * arguments. */
- #define log_fn (_log_fn_function_name=__FUNCTION__),_log_fn
- #endif
- #define log _log /* hack it so we don't conflict with log() as much */
- # define __LOG_H
- #endif
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