1.\" Copyright (c) 1987, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" %sccs.include.redist.roff% 5.\" 6.\" @(#)mesg.1 8.1 (Berkeley) 06/06/93 7.\" 8.Dd 9.Dt MESG 1 10.Os 11.Sh NAME 12.Nm mesg 13.Nd display (do not display) messages from other users 14.Sh SYNOPSIS 15.Nm mesg 16.Op Cm n | Cm y 17.Sh DESCRIPTION 18The 19.Nm mesg 20utility is invoked by a users to control write access others 21have to the terminal device associated with the standard error 22output. 23Write access is allowed by default, and programs such as 24.Xr talk 1 25and 26.Xr write 1 27may display messages on the terminal. 28.Pp 29Options available: 30.Bl -tag -width flag 31.It Cm n 32Disallows messages. 33.It Cm y 34Permits messages to be displayed. 35.El 36.Pp 37If no arguments are given, 38.Nm mesg 39displays the present message status to the standard error output. 40.Pp 41The 42.Nm mesg 43utility exits with one of the following values: 44.Bl -tag -width flag -compact -offset indent 45.Pp 46.It Li "\ 0" 47Messages are allowed. 48.It Li "\ 1" 49Messages are not allowed. 50.It Li "\>1" 51An error has occurred. 52.El 53.Sh FILES 54.Bl -tag -width /dev/[pt]ty[pq]? -compact 55.It Pa /dev/[pt]ty[pq]? 56.El 57.Sh SEE ALSO 58.Xr biff 1 , 59.Xr talk 1 , 60.Xr write 1 61.Sh HISTORY 62A 63.Nm mesg 64command appeared in 65.At v6 . 66