| 1 | .\" Copyright (c) 1983, 1991 The Regents of the University of California. |
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| 2 | .\" All rights reserved. |
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| 3 | .\" |
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| 4 | .\" Redistribution and use in source and binary forms, with or without |
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| 5 | .\" modification, are permitted provided that the following conditions |
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| 6 | .\" are met: |
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| 7 | .\" 1. Redistributions of source code must retain the above copyright |
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| 8 | .\" notice, this list of conditions and the following disclaimer. |
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| 9 | .\" 2. Redistributions in binary form must reproduce the above copyright |
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| 10 | .\" notice, this list of conditions and the following disclaimer in the |
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| 11 | .\" documentation and/or other materials provided with the distribution. |
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| 12 | .\" 3. All advertising materials mentioning features or use of this software |
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| 13 | .\" must display the following acknowledgement: |
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| 14 | .\" This product includes software developed by the University of |
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| 15 | .\" California, Berkeley and its contributors. |
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| 16 | .\" 4. Neither the name of the University nor the names of its contributors |
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| 17 | .\" may be used to endorse or promote products derived from this software |
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| 18 | .\" without specific prior written permission. |
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| 19 | .\" |
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| 20 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 21 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 22 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 23 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 24 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 25 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 26 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 27 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 28 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 29 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 30 | .\" SUCH DAMAGE. |
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| 31 | .\" |
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| 32 | .\" from: @(#)talkd.8 6.5 (Berkeley) 3/16/91 |
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| 33 | .\" $Id: talkd.8,v 1.2 1996-10-13 07:09:18 ghudson Exp $ |
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| 34 | .\" |
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| 35 | .TH TALKD 8 "March 16, 1991" |
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| 36 | .UC 4 |
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| 37 | .SH NAME |
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| 38 | talkd \- remote user communication server |
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| 39 | .SH SYNOPSIS |
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| 40 | .B talkd |
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| 41 | .SH DESCRIPTION |
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| 42 | .I Talkd |
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| 43 | is the server that notifies a user that someone else wants to |
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| 44 | initiate a conversation. |
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| 45 | It acts a repository of invitations, responding to requests |
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| 46 | by clients wishing to rendezvous to hold a conversation. |
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| 47 | In normal operation, a client, the caller, |
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| 48 | initiates a rendezvous by sending a CTL_MSG to the server of |
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| 49 | type LOOK_UP (see |
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| 50 | .RI < protocols/talkd.h >) . |
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| 51 | This causes the server to search its invitation |
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| 52 | tables to check if an invitation currently exists for the caller |
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| 53 | (to speak to the callee specified in the message). |
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| 54 | If the lookup fails, |
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| 55 | the caller then sends an ANNOUNCE message causing the server to |
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| 56 | broadcast an announcement on the callee's login ports requesting contact. |
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| 57 | When the callee responds, the local server uses the |
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| 58 | recorded invitation to respond with the appropriate rendezvous |
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| 59 | address and the caller and callee client programs establish a |
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| 60 | stream connection through which the conversation takes place. |
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| 61 | .SH SEE ALSO |
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| 62 | talk(1), write(1) |
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| 63 | .SH HISTORY |
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| 64 | The |
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| 65 | .I talk |
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| 66 | command appeared in 4.3BSD. |
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