Merge from vendor branch GROFF:
[dragonfly.git] / libexec / talkd / talkd.8
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1.\" Copyright (c) 1983, 1991, 1993
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32.\" @(#)talkd.8 8.2 (Berkeley) 12/11/93
33.\" $FreeBSD: src/libexec/talkd/talkd.8,v 1.3.2.2 2001/08/16 10:44:21 ru Exp $
1de703da 34.\" $DragonFly: src/libexec/talkd/talkd.8,v 1.2 2003/06/17 04:27:08 dillon Exp $
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35.\"
36.Dd December 11, 1993
37.Dt TALKD 8
38.Os
39.Sh NAME
40.Nm talkd
41.Nd remote user communication server
42.Sh SYNOPSIS
43.Nm
44.Sh DESCRIPTION
45.Nm Talkd
46is the server that notifies a user that someone else wants to
47initiate a conversation.
48It acts as a repository of invitations, responding to requests
49by clients wishing to rendezvous to hold a conversation.
50In normal operation, a client, the caller,
51initiates a rendezvous by sending a
52.Tn CTL_MSG
53to the server of
54type
55.Tn LOOK_UP
56(see
57.Aq Pa protocols/talkd.h ) .
58This causes the server to search its invitation
59tables to check if an invitation currently exists for the caller
60(to speak to the callee specified in the message).
61.Pp
62If the lookup fails,
63the caller then sends an
64.Tn ANNOUNCE
65message causing the server to
66broadcast an announcement on the callee's login ports requesting contact.
67.Pp
68When the callee responds, the local server uses the
69recorded invitation to respond with the appropriate rendezvous
70address and the caller and callee client programs establish a
71stream connection through which the conversation takes place.
72.Sh SEE ALSO
73.Xr talk 1 ,
74.Xr write 1
75.Sh HISTORY
76The
77.Nm
78command appeared in
79.Bx 4.3 .