projects / unix-history / blame
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1 | .\" Copyright (c) 1983, 1991 The Regents of the University of California. |
| 2 | .\" All rights reserved. | |
| 3 | .\" | |
| 4 | .\" Redistribution and use in source and binary forms, with or without | |
| 5 | .\" modification, are permitted provided that the following conditions | |
| 6 | .\" are met: | |
| 7 | .\" 1. Redistributions of source code must retain the above copyright | |
| 8 | .\" notice, this list of conditions and the following disclaimer. | |
| 9 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
| 10 | .\" notice, this list of conditions and the following disclaimer in the | |
| 11 | .\" documentation and/or other materials provided with the distribution. | |
| 12 | .\" 3. All advertising materials mentioning features or use of this software | |
| 13 | .\" must display the following acknowledgement: | |
| 14 | .\" This product includes software developed by the University of | |
| 15 | .\" California, Berkeley and its contributors. | |
| 16 | .\" 4. Neither the name of the University nor the names of its contributors | |
| 17 | .\" may be used to endorse or promote products derived from this software | |
| 18 | .\" without specific prior written permission. | |
| 19 | .\" | |
| 20 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 21 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 22 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 23 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 24 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 25 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 26 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 27 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 28 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 29 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 30 | .\" SUCH DAMAGE. | |
| 31 | .\" | |
| 32 | .\" @(#)talkd.8 6.5 (Berkeley) 3/16/91 | |
| 33 | .\" | |
| 34 | .Dd March 16, 1991 | |
| 35 | .Dt TALKD 8 | |
| 36 | .Os BSD 4.3 | |
| 37 | .Sh NAME | |
| 38 | .Nm talkd | |
| 39 | .Nd remote user communication server | |
| 40 | .Sh SYNOPSIS | |
| 41 | .Nm talkd | |
| 42 | .Sh DESCRIPTION | |
| 43 | .Nm Talkd | |
| 44 | is the server that notifies a user that someone else wants to | |
| 45 | initiate a conversation. | |
| 46 | It acts a repository of invitations, responding to requests | |
| 47 | by clients wishing to rendezvous to hold a conversation. | |
| 48 | In normal operation, a client, the caller, | |
| 49 | initiates a rendezvous by sending a | |
| 50 | .Tn CTL_MSG | |
| 51 | to the server of | |
| 52 | type | |
| 53 | .Tn LOOK_UP | |
| 54 | (see | |
| 55 | .Aq Pa protocols/talkd.h ) . | |
| 56 | This causes the server to search its invitation | |
| 57 | tables to check if an invitation currently exists for the caller | |
| 58 | (to speak to the callee specified in the message). | |
| 59 | If the lookup fails, | |
| 60 | the caller then sends an | |
| 61 | .Tn ANNOUNCE | |
| 62 | message causing the server to | |
| 63 | broadcast an announcement on the callee's login ports requesting contact. | |
| 64 | When the callee responds, the local server uses the | |
| 65 | recorded invitation to respond with the appropriate rendezvous | |
| 66 | address and the caller and callee client programs establish a | |
| 67 | stream connection through which the conversation takes place. | |
| 68 | .Sh SEE ALSO | |
| 69 | .Xr talk 1 , | |
| 70 | .Xr write 1 | |
| 71 | .Sh HISTORY | |
| 72 | The | |
| 73 | .Nm | |
| 74 | command appeared in | |
| 75 | .Bx 4.3 . |