nnrpd - NNTP server for on-campus hosts
nnrpd [ -r reason ] [ -s title padding ] [ -S host ] [ -t ]
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
Unlike innd, nnrpd supports all NNTP commands for user-oriented reading
Nnrpd uses the nnrp.access(5) file to control who is authorized to access
the Usenet database. When <config$NNRP_LOADLIMIT> is not 0, It will also
reject connections if the load average is greater than
<config$NNRP_LOADLIMIT> (typically 16.)
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).
-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
-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.
Nnrpd implements the NNTP commands defined in RFC 977, with the following
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
Written by Rich $alz <firstname.lastname@example.org> for InterNetNews. Overview
support added by Rob Robertston <email@example.com> and Rich in
January, 1993. This is revision 1.14, dated 1996/10/29.
ctlinnd(8) , innd(8) , inn.conf(5) , nnrp.access(5) , signal(2), wildmat(3) .
You can find a summary and links related to this topic
as part of the Mib Software Usenet RKT.