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92fa6c196a
Rename the logging primitive functions and utility functions, prefixing all with 'serval_log', eg: logMessage() -> serval_logf() etc. Add an XPRINTF xhexdump() function and use it to implement the serval_log_hexdump() utility, renamed from dump(). Add macros WHY_dump(), WARN_dump(), HINT_dump() and DEBUG_dump(), and use them everywhere. Remove the 'log.console.dump_config' and 'log.file.dump_config' configuration options; configuration is now dumped in every log prolog. The logging system now constructs the log prolog by invoking the new 'log_prolog' trigger, so that it no longer depends on the version string and configuration system. Any system that wants to present a message in the log prolog can define its own trigger, which calls standard log primitives to print the message. Split the logging system into a front-end (log.c) that provides the logging primitives and is independent of the configuration system, and a set of back-end "outputters" (log_output_console.c, log_output_file.c, log_output_android.c) that may depend on the configuration system and are decoupled from the front-end using the 'logoutput' link section. These log outputters are explicitly linked into executables by the Makefile rules, but could also be linked in using USE_FEATURE(). The USE_FEATURE() calls have _not_ been added to servald_features.c, so that different daemon executables can be built with the same feature set but different log outputs.
43 lines
1.6 KiB
C
43 lines
1.6 KiB
C
/*
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Serval DNA log prolog
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Copyright (C) 2017 Flinders University
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __SERVAL_DNA__LOG_PROLOG_H
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#define __SERVAL_DNA__LOG_PROLOG_H
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#include "trigger.h"
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/* Whenever a log output starts a new log, such as opening the console for the
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* first time or rotating to a new log file, or even at a regular interval, it
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* emits a "prolog" that starts with the current date/time, then a series of
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* log messages generated by invoking all the log_prolog triggers.
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*
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* The log_prolog trigger functions call the standard logging API to produce
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* their output, but the logging system uses an internal trick to ensure that
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* the their messages only go to the log output that invoked them, so for
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* example, when a log file rotates, the prolog only gets written into the new
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* file, and not into the console log as well.
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*/
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DECLARE_TRIGGER(log_prolog);
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struct log_output_iterator;
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void serval_log_print_prolog(struct log_output_iterator *it);
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#endif // __SERVAL_DNA__LOG_PROLOG_H
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