mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
79 lines
3.0 KiB
Groff
79 lines
3.0 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)talkd.8 8.2 (Berkeley) 12/11/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd December 11, 1993
|
|
.Dt TALKD 8
|
|
.Os BSD 4.3
|
|
.Sh NAME
|
|
.Nm talkd
|
|
.Nd remote user communication server
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.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).
|
|
.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
|
|
command appeared in
|
|
.Bx 4.3 .
|