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103 lines
3.5 KiB
C
103 lines
3.5 KiB
C
/* Copyright 2001,2002,2003 Roger Dingledine, Matej Pfajfar.
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* Copyright 2004-2005 Roger Dingledine, Nick Mathewson */
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/* See LICENSE for licensing information */
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/* $Id$ */
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/**
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* \file log.h
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*
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* \brief Headers for log.c
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**/
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#ifndef __LOG_H
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#define LOG_H_ID "$Id$"
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#include "../common/compat.h"
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#ifdef HAVE_SYSLOG_H
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#include <syslog.h>
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#define LOG_WARN LOG_WARNING
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#if LOG_DEBUG < LOG_ERR
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#error "Your syslog.h thinks high numbers are more important. We aren't prepared to deal with that."
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#endif
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#else
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/* XXXX Note: The code was originally written to refer to severities,
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* with 0 being the least severe; while syslog's logging code refers to
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* priorities, with 0 being the most important. Thus, all our comparisons
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* needed to be reversed when we added syslog support.
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*
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* The upshot of this is that comments about log levels may be messed
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* up: for "maximum severity" read "most severe" and "numerically
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* *lowest* severity".
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*/
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/** Debug-level severity: for hyper-verbose messages of no interest to
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* anybody but developers. */
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#define LOG_DEBUG 7
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/** Info-level severity: for messages that appear frequently during normal
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* operation. */
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#define LOG_INFO 6
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/** Notice-level severity: for messages that appear infrequently
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* during normal operation; that the user will probably care about;
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* and that are not errors.
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*/
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#define LOG_NOTICE 5
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/** Warn-level severity: for messages that only appear when something has gone
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* wrong. */
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#define LOG_WARN 4
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/** Error-level severity: for messages that only appear when something has gone
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* very wrong, and the Tor process can no longer proceed. */
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#define LOG_ERR 3
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#endif
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typedef void (*log_callback)(int severity, const char *msg);
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int parse_log_level(const char *level);
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const char *log_level_to_string(int level);
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void add_stream_log(int severityMin, int severityMax, const char *name, FILE *stream);
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int add_file_log(int severityMin, int severityMax, const char *filename);
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#ifdef HAVE_SYSLOG_H
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int add_syslog_log(int loglevelMin, int loglevelMax);
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#endif
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int add_callback_log(int loglevelMin, int loglevelMax, log_callback cb);
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int get_min_log_level(void);
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void switch_logs_debug(void);
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void close_logs(void);
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void reset_logs(void);
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void add_temp_log(void);
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void close_temp_logs(void);
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void mark_logs_temp(void);
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void configure_libevent_logging(void);
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void suppress_libevent_log_msg(const char *msg);
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void change_callback_log_severity(int loglevelMin, int loglevelMax,
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log_callback cb);
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/* Outputs a message to stdout */
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void _log(int severity, const char *format, ...) CHECK_PRINTF(2,3);
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#ifdef __GNUC__
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void _log_fn(int severity, const char *funcname, const char *format, ...)
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CHECK_PRINTF(3,4);
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/** Log a message at level <b>severity</b>, using a pretty-printed version
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* of the current function name. */
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#define log_fn(severity, args...) \
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_log_fn(severity, __PRETTY_FUNCTION__, args)
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#elif defined(_MSC_VER) && _MSC_VER < 1300
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/* MSVC 6 and earlier don't have __FUNCTION__, or even __LINE__. */
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#define log_fn _log
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#else
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/* We don't have GCC's varargs macros, so use a global variable to pass the
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* function name to log_fn */
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extern const char *_log_fn_function_name;
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void _log_fn(int severity, const char *format, ...);
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/* We abuse the comma operator here, since we can't use the standard
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* do {...} while (0) trick to wrap this macro, since the macro can't take
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* arguments. */
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#define log_fn (_log_fn_function_name=__FUNCTION__),_log_fn
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#endif
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#define log _log /* hack it so we don't conflict with log() as much */
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# define __LOG_H
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#endif
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