overchan man page on 4.4BSD

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OVERCHAN(8)							   OVERCHAN(8)

NAME
       overchan - update the news overview database

SYNOPSIS
       overchan [ -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 ALSO
       newsfeeds(5), newsoverview(5), newsoverview(8).

								   OVERCHAN(8)
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