NAME

       nnrpd - NNTP server for on-campus hosts

SYNOPSIS

       nnrpd [ -r reason ] [ -s title padding ] [ -S host ] [ -t ]

DESCRIPTION

       Nnrpd  is  an NNTP server for newsreaders.  It accepts commands on its standard input and responds on its
       standard output.  It is normally invoked by innd(8) with those descriptors attached to  a  remote  client
       connection.

       Unlike innd, nnrpd supports all NNTP commands for user-oriented reading and posting.

       Nnrpd  uses  the nnrp.access(5) file to control who is authorized to access the Usenet database.  It will
       also reject connections if the load average is greater than 10.

       On exit, nnrpd will report usage statistics through syslog(3).

       Nnrpd can accept multimedia postings that follow the MIME standard as long  as  such  postings  are  also
       acceptible as SMTP messages.  See the discussion of the MIME headers in inn.conf(5).

OPTIONS

       -r     If  the  ``-r''  flag is used, then nnrpd will reject the incoming connection giving reason as the
              text.  This flag is used by innd when it is paused or throttled.

       -s     As each command is received, nnrpd tries to change its ``argv'' array so that ps(1) will print out
              the command being executed.  To get a full display, the ``-s'' flag may be used with a long string
              as its argument, which will be overwritten when the program changes its title.

       -t     If the ``-t'' flag is used then all client commands  and  initial  responses  will  be  traced  by
              reporting  them in syslog.  This flag is set by innd under the control of the ctlinnd(8) ``trace''
              command, and is toggled upon receipt of a SIGHUP; see signal(2).

       -S     If the ``-S'' flag is used, then all postings are forwarded to the specified host, which should be
              the master NNTP server.  This flag is set by innd if it is started with the ``-S'' flag.

   PROTOCOL DIFFERENCES
       Nnrpd implements the NNTP commands defined in RFC 977, with the following differences:

       1.     The ``ihave'' command is not implemented.  Users should be using  the  ``post''  command  to  post
              articles.

       2      The ``slave'' command is not implemented.  This command has never been fully defined.

       3      The  ``list''  command  may  be followed by the optional word ``active.times'', ``distributions'',
              ``distrib.pats'', ``newsgroups'', ``subscriptions'', or ``overview.fmt'' to get  a  list  of  when
              newsgroups  where  created,  a list of valid distributions, a file specifying default distribution
              patterns, a one-per-line description of the current set of newsgroups, a  list  of  the  automatic
              group  subscriptions,  or  a  listing of the overview.fmt(5) file.  The command ``list active'' is
              equivalent to the ``list'' command.  This is a common extension.

       4.     The ``xhdr'', ``authinfo user'', and ``authinfo pass'' commands are implemented.  These are  based
              on the reference Unix implementation; no other documentation is available.

       5.     A  new command, ``xpat header range|MessageID pat [morepat...]'', is provided.  The first argument
              is the case-insensitive name of the header to be searched.   The  second  argument  is  either  an
              article  range  or  a  single  Message-ID,  as  specified  in  RFC  977.   The third argument is a
              wildmat(3)-style pattern; if there are additional arguments they are joined together separated  by
              a single space to form the complete pattern.  This command is similar to the ``xhdr'' command.  It
              returns  a  221 response code, followed by the text response of all article numbers that match the
              pattern.

       6.     The ``listgroup group'' command is provided.  This is a comment extension.  It  is  equivalent  to
              the  ``group''  command, except that the reply is a multi-line response containing the list of all
              article numbers in the group.

       7.     The ``xgtitle [group]'' command is provided.  This extension is used by ANU-News.   It  returns  a
              282  reply code, followed by a one-line description of all newsgroups that match the pattern.  The
              default is the current group.

       8.     The ``xover [range]'' command is provided.  It returns a 224 reply code, followed by the  overview
              data for the specified range; the default is to return the data for the current article.

       9.     The ``xpath MessageID'' command is provided; see innd(8).

       10.    The ``date'' command is provided; this is based on the draft NNTP protocol revision.  It returns a
              one-line  response  code  of  111  followed  by  the  GMT  date and time on the server in the form
              YYYYMMDDhhmmss.

HISTORY

       Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews.  Overview support  added  by  Rob  Robertston
       <rob@violet.berkeley.edu> and Rich in January, 1993.  This is revision 1.14, dated 1996/10/29.

SEE ALSO

       ctlinnd(8), innd(8), inn.conf(5), nnrp.access(5), signal(2), wildmat(3).

                                                                                                        NNRPD(8)