1.\" $NetBSD: mesg.1,v 1.7 2002/02/08 01:36:28 ross Exp $ 2.\" 3.\" Copyright (c) 1987, 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)mesg.1 8.1 (Berkeley) 6/6/93 35.\" 36.Dd June 6, 1993 37.Dt MESG 1 38.Os 39.Sh NAME 40.Nm mesg 41.Nd display (do not display) messages from other users 42.Sh SYNOPSIS 43.Nm 44.Op Cm n | Cm y 45.Sh DESCRIPTION 46The 47.Nm 48utility is invoked by a user to control write access others 49have to the terminal device associated with the standard error 50output. 51Write access is allowed by default, and programs such as 52.Xr talk 1 53and 54.Xr write 1 55may display messages on the terminal. 56.Pp 57Options available: 58.Bl -tag -width flag 59.It Cm n 60Disallows messages. 61.It Cm y 62Permits messages to be displayed. 63.El 64.Pp 65If no arguments are given, 66.Nm 67displays the present message status to the standard error output. 68.Pp 69The 70.Nm 71utility exits with one of the following values: 72.Bl -tag -width flag -compact -offset indent 73.Pp 74.It Li "\ 0" 75Messages are allowed. 76.It Li "\ 1" 77Messages are not allowed. 78.It Li "\*[Gt]1" 79An error has occurred. 80.El 81.Sh FILES 82.Bl -tag -width /dev/[pt]ty[pq]? -compact 83.It Pa /dev/[pt]ty[pq]? 84.El 85.Sh SEE ALSO 86.Xr biff 1 , 87.Xr talk 1 , 88.Xr write 1 89.Sh HISTORY 90A 91.Nm 92command appeared in 93.At v6 . 94