OVERCHAN(8)                                                        OVERCHAN(8)


       overchan - update the news overview database


       overchan [ file ...  ]


       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 was originally designed to be used by InterNetNews  or  the  C
       News  ‘‘mkov’’ packages to update the database as the articles come in.
       For current INN, the database is stored in a selected overview  method.
       This  can  be  done  within innd(8) itself, but overchan(8) can be used
       instead, if <useoverchan in inn.conf> is ‘‘true’’ and appropriate setup
       is done in newsfeeds, for example:

              overview!:*:Tc,WnteO:<pathbin in inn.conf>/overchan

       Overchan  input  data  consists  of a line of text, separated into four
       parts by a space.  The first part is a token for the article.  The sec-
       ond part is time when the article was received.  The third part is time
       when the article will be expired (which represents the Expires header).
       The fourth part is the data to be stored.

       The  data  in  the  overview files should be expired by running expire-
       over(8).  This is normally done by adding the  ‘‘expireover’’  flag  to
       the news.daily(8) invocation.


       Written  by  Rob  Robertson  <rob@violet.berkeley.edu>  and  Rich  $alz
       <rsalz@uunet.uu.net> for InterNetNews.  This is  revision  1.11,  dated


       expireover(8), inn.conf(5), news.daily(8), newsfeeds(5).


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