controlchan - Channel-fed control message handler


   controlchan [-ch]


   controlchan removes the responsibility for handling control messages
   (except cancels) from innd and instead processes them from a channel or
   file feed.

   The two Perl modules "Encode" and "MIME::Parser" are required by

   To reduce load, controlchan keeps a copy of control.ctl and
   control.ctl.local in memory and checks permissions (including any
   required PGP headers) before any scripts are called.  These two
   configuration files are automatically reloaded when controlchan notices
   they have been modified.  Also, the default case of an unrecognized
   control article is handled internally.  The "drop" case is handled with
   far less fuss.

   Normally, controlchan is invoked by innd as configured in newsfeeds.
   An example entry is below.  Make sure that the newsgroup
   "control.cancel" exists so that controlchan does not have to scan
   through cancels, which it will not be processing anyway.

           :<pathbin in inn.conf>/controlchan

   controlchan can also be manually invoked with a mere path to a file
   (containing a complete control article with its headers and its body)
   or a token on its standard input:

       echo '/path/to/a/control/article' | controlchan
       echo '@0303465234000000000000235AE000000002@' | controlchan

   Note that in the (very, very unlikely) event that you need to process
   ihave/sendme control messages, be sure that logipaddr is set to false
   in inn.conf, because in this case controlchan needs a site name, not an
   IP address.

   controlchan tries to report all log messages through syslog(3), unless
   connected to an interactive terminal.  To enable syslog(3)'ing for
   versions of Perl prior to 5.6.0, you will need to have run h2ph on your
   system include files at some point (this is required to make
   "Sys::Syslog" work).  If you have not done so, do this:

       cd /usr/include
       h2ph * sys/*

   If you run FreeBSD, you will need to run the following in addition:

       h2ph machine/*


   -c  By default, controlchan does not process articles whose Date: or
       Injection-Date: header fields are too far in the past (more than
       artcutoff days, as set in inn.conf) or one day in the future.  It
       allows to prevent a malicious replay of old control articles.

       Using the -c flag disables this check on the cutoff date.

   -h  Gives usage information.


   Written by Katsuhiro Kondou <> for InterNetNews.
   Converted to POD by Julien Elie.

   $Id: controlchan.pod 9240 2011-07-12 09:51:28Z iulius $


   control.ctl(5), inn.conf(5).


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