1.\" $OpenBSD: talk.1,v 1.18 2003/06/10 09:12:12 jmc 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. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.\" @(#)talk.1 8.1 (Berkeley) 6/6/93 32.\" 33.Dd June 6, 1993 34.Dt TALK 1 35.Os 36.Sh NAME 37.Nm talk 38.Nd talk to another user 39.Sh SYNOPSIS 40.Nm talk 41.Op Fl Hs 42.Ar person 43.Op Ar ttyname 44.Sh DESCRIPTION 45.Nm 46is a visual communication program which copies lines from your 47terminal to that of another user. 48.Pp 49The command arguments are as follows: 50.Bl -tag -width ttyname 51.It Fl H 52Don't escape characters with the high bit set. 53This may be useful for certain character sets, but could cause erratic 54behaviour on some terminals. 55.It Fl s 56Use smooth scrolling in the 57.Nm 58window. 59The default is to clear the next two rows and jump from the bottom of 60the window to the top. 61.It Ar person 62If you wish to talk to someone on your own machine, then 63.Ar person 64is just the person's login name. 65If you wish to talk to a user on another host, then 66.Ar person 67is of the form 68.Ql user@host . 69.It Ar ttyname 70If you wish to talk to a user who is logged in more than once, the 71.Ar ttyname 72argument may be used to indicate the appropriate terminal 73name, where 74.Ar ttyname 75is of the form 76.Ql ttyXX . 77.El 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.Nm talk 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