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newsoverview.8
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NEWSOVERVIEW(8CN) NEWSOVERVIEW(8CN)
NAME
initov, domkov, mkov, expov - maintain netnews overview
database
SYNOPSIS
uunews:bin/nov/initov
uunews:bin/nov/domkov
uunews:bin/nov/mkov [ -an ] [ -o stamp ] [ file ... ]
uunews:bin/nov/expov
DESCRIPTION
These programs keep the netnews overview database for
newsreaders up to date.
Initov creates the database initially by reading all the
articles under uunews:. This takes a long time (on the
order of 12 hours, in late 1992), and can be avoided by
letting domkov incrementally generate a database for new
articles as they arrive; after a week or so, most articles
should be in the database. The news system should not be
locked when initov is run; initov takes care of the neces-
sary locking internally, and deals with articles that
arrive while it is running (primarily by deferring their
processing to domkov).
Domkov is run from newsrun(8CN). It updates the database
files from the header stream produced by relaynews(8CN)
for new articles.
Mkov normally reads a stream of RFC 1036 headers, with
those of each article separated from those of its neigh-
bours by an empty line, from files (standard input if
none) and writes a summary in the format of
newsoverview(5), but with a field containing the article's
news spool directory name relative to /usr/spool/news
prepended, on standard output. -a reads articles instead
of a header stream (but ignores filess which are directo-
ries or have names which do not resemble article names,
i.e. do not have a leading digit on their last component).
and omits the initial directory name field; -n requests
the initial directory name despite -a; -o causes only
articles older than the file stamp to be summarised.
Expov should be run after expire(8CN) (and is, by doex-
pire(8CN)) to delete database entries for missing arti-
cles.
FILES
uunews:/group/.overview
overview database
uunews:/LOCKoverview
lock file for the database
uunews:/headers stream of headers from newly-arrived
articles
15 Aug 1994 1
NEWSOVERVIEW(8CN) NEWSOVERVIEW(8CN)
uunews:/active active newsgroups
SEE ALSO
newsoverview(5), expire(8CN), relaynews(8CN)
HISTORY
Written by Geoff Collyer, with minor contributions from
Henry Spencer, as part of the C News project.
BUGS
mkov -o is a blemish, but it really speeds up initov.
15 Aug 1994 2