OVERCHAN(8)OVERCHAN(8)NAMEoverchan - update the news overview database
SYNOPSISoverchan [ -D dir ] [ -c ] [ file... ]
DESCRIPTION
Overchan reads article data from files or standard input if none are
specified. (A single dash in the file list means to read standard
input.) It uses this information to update the news overview database.
Overchan is designed to be used by InterNetNews or the C News ``mkov''
packages to update the database as the articles come in. The database
for each newsgroup is stored in a file named .overview in a newsgroup
directory within the overview database tree.
Overchan locks the database file (by locking an auxiliary file) before
appending the new data. To purge data after articles have been
expired, see expireover(8).
By default, overchan processes its input as an INN overview stream
written as a ``WO'' entry in the newsfeeds(5) file, for example:
overview:*:Tc,WO:/usr/contrib/news/overchan
This data consists of a line of text, separated into two parts by a
tab. The first part is a list of all relative pathnames where the
article has been written, with a single space between entries. The
second part is the data to be written into the overview file, except
that the initial article number is omitted.
To process the output of the mkov(8) program, use the ``-c'' flag.
This format is described in the ``nov'' distribution.
The ``-D'' flag can be used to specify where the databases are stored.
The default directory is /var/spool/news/spool.
HISTORY
Written by Rob Robertson <rob@violet.berkeley.edu> and Rich $alz
<rsalz@uunet.uu.net> for InterNetNews. This is revision 1.3, dated
1993/03/18.
SEE ALSOnewsfeeds(5), newsoverview(5), newsoverview(8).
OVERCHAN(8)
