freebsd-dev/libexec/talkd/talkd.8
Christian Brueffer 5efaea4cc6 Remove the 3rd clause ("advertising clause") of the BSD license as
permitted by the University of Berkeley on July 22, 1999.

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.\" @(#)talkd.8 8.2 (Berkeley) 12/11/93
.\" $FreeBSD$
.\"
.Dd December 11, 1993
.Dt TALKD 8
.Os
.Sh NAME
.Nm talkd
.Nd remote user communication server
.Sh SYNOPSIS
.Nm
.Sh DESCRIPTION
The
.Nm
utility
is the server that notifies a user that someone else wants to
initiate a conversation.
It acts as a repository of invitations, responding to requests
by clients wishing to rendezvous to hold a conversation.
In normal operation, a client, the caller,
initiates a rendezvous by sending a
.Tn CTL_MSG
to the server of
type
.Tn LOOK_UP
(see
.In protocols/talkd.h ) .
This causes the server to search its invitation
tables to check if an invitation currently exists for the caller
(to speak to the callee specified in the message).
.Pp
If the lookup fails,
the caller then sends an
.Tn ANNOUNCE
message causing the server to
broadcast an announcement on the callee's login ports requesting contact.
.Pp
When the callee responds, the local server uses the
recorded invitation to respond with the appropriate rendezvous
address and the caller and callee client programs establish a
stream connection through which the conversation takes place.
.Sh SEE ALSO
.Xr talk 1 ,
.Xr write 1
.Sh HISTORY
The
.Nm
utility appeared in
.Bx 4.3 .