Setting Up Links; Non-Mail Links; Mail Links - Sun Microsystems Sun Workstation 100U System Manager's Manual

Files
USENET Installation and Maintenance
Here is a sample
' 1 1'
file for a site "zenith" with eonneetions to "nadir". "Nadir" also passes
news on to "lowerreaches". We assume that "zenith" and "Iowerreaches" exchange a local
newsgroup class lng.all as well as the network wide newsgroups. News to "Iowerreaches" is
batched.
zenith:net.all,fa.all,lng.all::
nadir:net.all,fa.all::
10werreaches:net.all,fa.all,lng.all:F:/usrlspool/batch/lowerreaches
2. Setting up Links
There are two basic types of links for exchanging news: those that use mail and those that
don't. The ones that use mail are more indirect, yet more versatile; the ones that don't are
simpler. The default type is without mail, so we discuss it first.
2.1.
Non-mail Links
The basic theory behind a non-mail link is that the rnew. program is invoked on the remote
system with the article being transmitted as the standard input. This is possible on various
networks, but the most common implementation is via the UUCP network. Using the uuz(lC)
command, the command which is forked to the shellioob like:
u ux - -r
-IS
remote,y, !rnews
<
ort'clenome
This is the default transmission method. In order to set up such a link, obviously a UUCP link
with the remote system must be in effect. In addition, rnew. must be available and executable
by uuzqt on the remote machine. In most cases, this means that rnew. must be in
I
u.rlbin so
uuz can find it.
2.2. Mail Links
When using mail to transmit articles, two intermediary programs are necessary: , entlnew, (8)
and uurec(8). The mail link works as follows. First, the folks at system A arrange to run ,end-
new. on articles they wish to send to system B by placing an entry like the following in the
'II'
file on system A:
/usr/lib/news/sendnews -a rnews@B
The -a option specifies that the mail should be formatted for the arpanet. When someone at
system A sends an article to system B, .endnew. packages the article and mails it to rnewsGB.
Somehow, system B must make sure that all mail to user "rnews" is fed as input to the uurec
program. The best way to make this happen is to use ,endmtJil or de/ivermtJi/, if you are on a
system running them. So the system B administrator creates an alias in
I
u.r
Ili6/oliue.
like
this:
rnews: "I/usr/lib/news/uurec"
When uurec receives the article, it unpackages the article and invokes rnew,.
4 7 January 1984