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PRUNEHISTORY(8)


NAME

  prunehistory - remove tokens from Usenet history file


SYNOPSIS

  prunehistory [ -f filename ] [ -p ]


DESCRIPTION

  Prunehistory modifies a history(5)-format text file to ``remove'' a set of
  tokens from it.  The tokens are removed by overwriting them with spaces, so
  that the size and position of any following entries does not change.	This
  has an effect similar to expiring the article, in that it is still
  mentioned in the history database but cannot be retrieved.

  Prunehistory reads the standard input.  The input is taken as a set of
  lines.  Blank lines and lines starting with a number sign (``#'') are
  ignored.  All other lines are should consist of a Message-ID followed by
  zero or more other fields (which are ignored).

  The Message-ID is used as the dbz(3) key to get an offset into the text
  file.

  Since innd(8) only appends to the text file, prunehistory does not need to
  have any interaction with it.


OPTIONS

  -p   Prunehistory will normally complain about lines that do not follow the
       correct format.	If the ``-p'' flag is used, then the program will
       silently print any invalid lines on its standard output.	 (Blank lines
       and comment lines are also passed through.) This can be useful when
       prunehistory is used as a filter for other programs such as reap.

  -f filename
       The default name of the history file is <pathdb in inn.conf>/history;
       to specify a different name, use the ``-f'' flag.


HISTORY

  Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews.  This is
  revision 1.8, dated 2002/12/03.


SEE ALSO

  dbz(3), history(5), inn.conf(5), innd(8).

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