42 lines
1.8 KiB
HTML
42 lines
1.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
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<!--Converted with LaTeX2HTML 96.1-c (Feb 29, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds -->
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<HTML>
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<HEAD>
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<TITLE>Control Messages</TITLE>
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</HEAD>
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<BODY LANG="EN">
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<A HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="contents_motif.gif"></A> <BR>
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<B> Next:</B> <A HREF="node268.html">The cancel Message</A>
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<B>Up:</B> <A HREF="node259.html">C-News</A>
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<B> Previous:</B> <A HREF="node266.html">Miscellaneous Files</A>
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<BR> <P>
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<H1><A NAME="SECTION0019800000">Control Messages</A></H1>
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<A NAME="cnewscontrol"></A>
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The Usenet news protocol knows a special category of articles which
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evoke certain responses or actions by the news system. These are called
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<em>control</em> messages. They are recognized by the presence of a
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Control: field in the article header, which contains the name of
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the control operation to be performed. There are several types of them,
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all of which are handled by shell scripts located in
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/usr/lib/news/ctl.
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<P>
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Most of these will perform their action automatically at the time
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the article is processed by C-News, without notifying the newsmaster.
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By default, only checkgroups messages will be handed to the
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newsmaster,<A HREF="footnode.html#9363"><IMG ALIGN=BOTTOM ALT="gif" SRC="foot_motif.gif"></A> but you may change this by editing the scripts.
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<P>
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<BR> <HR>
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<UL>
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<LI> <A HREF="node268.html#SECTION0019810000">The cancel Message</A>
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<LI> <A HREF="node269.html#SECTION0019820000">newgroup and rmgroup</A>
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<LI> <A HREF="node270.html#SECTION0019830000">The checkgroups Message</A>
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<LI> <A HREF="node271.html#SECTION0019840000">sendsys, version, and senduuname</A>
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</UL>
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<BR> <HR>
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<P><ADDRESS>
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<I>Andrew Anderson <BR>
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Thu Mar 7 23:22:06 EST 1996</I>
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</ADDRESS>
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</BODY>
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</HTML>
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