nnrpd man page on 4.4BSD

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NNRPD(8)							      NNRPD(8)

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.

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

       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 16.

       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 argu‐
       ment, which will be overwritten when the program changes its title.

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

       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).

       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.

       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).

   PROTOCOL DIFFERENCES
       Nnrpd implements the NNTP commands defined in RFC 977, with the follow‐
       ing 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'', ``news‐
	      groups'', 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, 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	imple‐
	      mentation; 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 sim‐
	      ilar 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	 arti‐
	      cle.

       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 1.12, dated 1993/03/18.

SEE ALSO
       ctlinnd(8),  innd(8),  inn.conf(5),  nnrp.access(5),  signal(2),	 wild‐
       mat(3).

								      NNRPD(8)
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