scanlogs summarizes the information recorded in the INN log files which reside in the pathlog directory
set in inn.conf (see newslog(5) for further details about these log files). It is normally invoked by
the news.daily(8) script which performs daily server maintenance tasks.
It invokes "ctlinnd flushlogs" to close the news and error log files, rename them to add ".old" to the
file names and open fresh news and error logs; the active file is also flushed to disk, along with the
history database.
By default, scanlogs rotates and cleans out the logs. It keeps up to logcycles old compressed log files
in pathlog/OLD (the logcycles parameter can be set in inn.conf). scanlogs also keeps archives of the
active file in this directory.
It invokes tally.control if newgroup.log or rmgroup.log exists in pathlog (see the control.log entry of
newslog(5) for more information about that).
scanlogs displays the first 50 lines of errlog, news.err and news.crit, if non-empty, and runs innreport
to summarize the contents of news, news.notice and perl-nocem.log, and to update the unwanted.log file
amongst other things (see more information about that in innreport(8)).