freebsd-dev/libexec/talkd/talkd.8

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.\" Copyright (c) 1983, 1991, 1993
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.\" @(#)talkd.8 8.2 (Berkeley) 12/11/93
.\" $FreeBSD$
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.\"
.Dd December 11, 1993
.Dt TALKD 8
.Os BSD 4.3
.Sh NAME
.Nm talkd
.Nd remote user communication server
.Sh SYNOPSIS
.Nm talkd
.Sh DESCRIPTION
.Nm Talkd
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
.Aq Pa 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).
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.Pp
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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.
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.Pp
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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
command appeared in
.Bx 4.3 .