Zilog EZ80F91GA - Manual (Page 39)

UM024502-1012 Logging to the File System
ZGATE Embedded Security Development Kit
User Manual
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interval seconds.
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The archival threshold setting for the zgate.log and zg_thl.log file is specified in the
ZGATE configuration settings and can be modified at run time using the zg_logging shell
command, the logging configuration web page, or the ZGATE_set_max_logfile_size
API function.
Just before writing a new entry to the appropriate log file, ZGATE determines if the size of
the current log file exceeds the archiving threshold. If so, ZGATE erases the previous
archive file, if present, then changes the name of the current log file to that of the archive.
These archiving thresholds are not absolute maximums. ZGATE only determines the size
of the current log file before adding a new entry and will write the entire new entry to the
log file if the initial size is below the threshold.


For example, if the archiving threshold of
zgate.log is 1000 bytes, the current size of the
file is 995 bytes, and ZGATE writes a 30-byte entry to the log, the size of the log file will
reach 1025 bytes. The next time ZGATE is about to add an entry to the
zgate.log file,
the file will be archived to zg_lg.old because its size now exceeds the archiving thresh-
old. The new log entry will then be the first (and initially only item) in the new zgate.log
file.
Note: