1.\" $OpenBSD: talk.1,v 1.13 2000/12/31 00:24:51 hugh Exp $ 2.\" $NetBSD: talk.1,v 1.3 1994/12/09 02:14:23 jtc Exp $ 3.\" 4.\" Copyright (c) 1983, 1990, 1993 5.\" The Regents of the University of California. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by the University of 18.\" California, Berkeley and its contributors. 19.\" 4. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" @(#)talk.1 8.1 (Berkeley) 6/6/93 36.\" 37.Dd June 6, 1993 38.Dt TALK 1 39.Os 40.Sh NAME 41.Nm talk 42.Nd talk to another user 43.Sh SYNOPSIS 44.Nm talk 45.Op Fl H 46.Ar person 47.Op Ar ttyname 48.Sh DESCRIPTION 49.Nm 50is a visual communication program which copies lines from your 51terminal to that of another user. 52.Pp 53The command arguments are as follows: 54.Bl -tag -width ttyname 55.It Ar person 56If you wish to talk to someone on your own machine, then 57.Ar person 58is just the person's login name. 59If you wish to talk to a user on another host, then 60.Ar person 61is of the form 62.Ql user@host . 63.It Ar ttyname 64If you wish to talk to a user who is logged in more than once, the 65.Ar ttyname 66argument may be used to indicate the appropriate terminal 67name, where 68.Ar ttyname 69is of the form 70.Ql ttyXX . 71.El 72.Pp 73If the 74.Fl H 75argument is given, talk will not escape high characters. 76This may be useful for certain character sets, but could cause erratic 77behaviour on some terminals. 78.Pp 79When first called, 80.Nm 81sends the message 82.Pp 83.Bd -literal -offset indent -compact 84Message from Talk_Daemon@localhost... 85talk: connection requested by your_name@your_machine. 86talk: respond with: talk your_name@your_machine 87.Ed 88.Pp 89to the user you wish to talk to. 90At this point, the recipient of the message should reply by typing 91.Pp 92.Dl talk \ your_name@your_machine 93.Pp 94It doesn't matter from which machine the recipient replies, as 95long as the login name is the same. 96If the machine is not the one to which 97the talk request was sent, it is noted on the screen. 98Once communication is established, 99the two parties may type simultaneously, with their output appearing 100in separate windows. 101Typing control-L 102.Pq Ql ^L 103will cause the screen to 104be reprinted, while the erase, kill, and word kill characters will 105behave normally. 106To exit, just type the interrupt character; 107.Nm 108then moves the cursor to the bottom of the screen and restores the 109terminal to its previous state. 110.Pp 111Permission to talk may be denied or granted by use of the 112.Xr mesg 1 113command. 114At the outset talking is allowed. 115Certain commands, in particular 116.Xr nroff 1 117and 118.Xr pr 1 , 119disallow messages in order to 120prevent messy output. 121.Sh FILES 122.Bl -tag -width /var/run/utmp -compact 123.It Pa /etc/hosts 124to find the recipient's machine 125.It Pa /var/run/utmp 126to find the recipient's tty 127.El 128.Sh SEE ALSO 129.Xr mail 1 , 130.Xr mesg 1 , 131.Xr who 1 , 132.Xr write 1 133.Sh HISTORY 134The 135.Nm 136command appeared in 137.Bx 4.2 . 138.Sh BUGS 139The version of 140.Xr talk 1 141released with 142.Bx 4.3 143uses a protocol that 144is incompatible with the protocol used in the version released with 145.Bx 4.2 . 146