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       applyfilter - apply filter settings to news spool


       applyfilter [-v] ... newsgroup


       Leafnode  is a USENET package intended for small sites, where there are
       few users and little disk space, but where a large number of groups  is

       Applyfilter  is the program to apply filter settings to your newsspool,
       particularly after changes that were not in  effect  at  the  time  the
       articles  were  downloaded  with  fetchnews. Applyfilter is used if you
       want to remove postings from  your  spool  matching  a  certain  filter
       pattern  (see  FILES  below). If the headers of an article match any of
       the filtering rules, the article is being deleted from the newsgroup.

       Applyfilter sets its real and effective uid to "news".


       -v     Be verbose.

              is the newsgroup you want to apply the filter to.


       A file specified in the filterfile option of  /etc/news/leafnode/config
       contains  the set of filtering rules that are applied to the newsspool.
       Each rule must be on a separate line. Empty lines and comments  (marked
       by a # which MUST be at the beginning of the line) are allowed and will
       be ignored.

       Each line contains a regular expression that will be compiled with  the
       PCRE_MULTILINE  option  set  (unless  it  is a comment line or an empty
       line). Every regular expression applied to  the  whole  message  header
       (folded  message  headers  are unfolded before the match is attempted).
       If any regular expression matches the header, the posting gets removed.
       For  example,  the following set of rules will delete all crosspostings
       to alt.flame.

       ^Newsgroups:.*[, ]alt.flame$
       ^Newsgroups:.*[, ]alt.flame,

       ^Newsgroups: indicates that the pattern should only be applied  to  the
       Newsgroups: header. After the header, an arbitrary number of characters
       may follow, ending in either a comma or a space. After that,  alt.flame
       must  be in the line, either at the end of the line (first entry) or in
       the middle of the line, followed by other newsgroups (second entry).

       Unfortunately, regular expressions are a complex matter and outside the
       scope  of  this document. Please see the manual pages provided with the
       PCRE library for details.

       Note that some leafnode programs (such as fetchnews)  feed  the  header
       line  by  line  to  the  regexp  (after  unfolding),  others  (such  as
       applyfilter) feed the whole header in one large  blob.  This  does  not
       usually  matter  because  patterns  are compiled in multiline mode, but
       will matter if you’re trying to match  multiple  headers  in  the  same
       regexp -- this would work with applyfilter, but not with fetchnews.


              This  variable  is  parsed  as  an  unsigned  integer  value and
              determines how many seconds applyfilter will wait when trying to
              obtain  the  lock file from another leafnode program. 0 means to
              wait indefinitely.  This  variable  takes  precedence  over  the
              configuration file.


       Copyright 1999 by Cornelius Krasel <krasel@wpxx02.toxi.uni->.
       Copyright 2002 - 2006 by Matthias Andree <>.

       Leafnode was originally written by Arnt Gulbrandsen <>
       and is copyright 1995-96 Troll Tech AS, Postboks 6133 Etterstad, 0602
       Oslo, Norway, fax +47 22646949.


       pcrepattern(3), leafnode(8), fetchnews(8), texpire(8).