BSD 4_4_Lite1 development

Work on file usr/src/old/talk/README

Synthesized-from: CSRG/cd2/4.4BSD-Lite1

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+Talk consists of two parts:
+
+    talk itself, which is the user interface. Talk initiates the
+        talk requests and negotiates with the suitable talk daemons.
+
+    talkd, the talk daemon. Talkd announces an invitation to talk
+        to a user on its' local machine and acts like a rendezvous
+        point for inter-machine talks. The socket address's of
+        the invitING talk process is kept at the local talkd of
+        the invitEE. Talkd must run as root, and should be forked
+        off on boot along with the other daemons. There is
+        no provision for automatic restart of talkd. If for
+        some reason it dies, it must be restarted by hand. Since
+        talkd opens a special addresses socket (517 at the present 
+        time), the first talkd to run will lock out any other
+        talkd. The locked out talkd will sit and bitch every
+        15 seconds for about five minutes, so don't leave it running.
+
+
+So, to install:
+
+       run 'make install' from the top of the talk source directory.
+       The install will fail if an older version of talkd is still
+       running. If it does fail because of a 'text file busy' error,
+       kill the old talkd and 'make install' again.
+
+       execute '/usr/lib/talkd' to start the daemon immediately.
+
+       Install a line in /etc/rc or /etc/rc.local to fork talkd off in
+       background on reboot. 
+
+       Try talk. If it immediately fails with 'Bad system call', then
+       you should recompile ctl.c with the -DGETSOCK flag and remake
+       talk. This makes talk use getsockname (actually syscall(150))
+       instead socketaddr(). This will go away once 4.1c stabilizes.