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92 lines
2.9 KiB
Groff
92 lines
2.9 KiB
Groff
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.\" Copyright (c) 1987, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)mesg.1 8.1 (Berkeley) 6/6/93
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.\"
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.Dd June 6, 1993
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.Dt MESG 1
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.Os
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.Sh NAME
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.Nm mesg
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.Nd display (do not display) messages from other users
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.Sh SYNOPSIS
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.Nm mesg
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.Op Cm n | Cm y
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.Sh DESCRIPTION
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The
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.Nm mesg
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utility is invoked by a users to control write access others
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have to the terminal device associated with the standard error
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output.
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Write access is allowed by default, and programs such as
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.Xr talk 1
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and
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.Xr write 1
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may display messages on the terminal.
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.Pp
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Options available:
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.Bl -tag -width flag
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.It Cm n
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Disallows messages.
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.It Cm y
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Permits messages to be displayed.
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.El
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.Pp
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If no arguments are given,
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.Nm mesg
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displays the present message status to the standard error output.
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.Pp
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The
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.Nm mesg
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utility exits with one of the following values:
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.Bl -tag -width flag -compact -offset indent
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.Pp
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.It Li "\ 0"
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Messages are allowed.
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.It Li "\ 1"
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Messages are not allowed.
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.It Li "\>1"
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An error has occurred.
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.El
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.Sh FILES
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.Bl -tag -width /dev/[pt]ty[pq]? -compact
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.It Pa /dev/[pt]ty[pq]?
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.El
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.Sh SEE ALSO
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.Xr biff 1 ,
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.Xr talk 1 ,
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.Xr write 1
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.Sh HISTORY
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A
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.Nm mesg
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command appeared in
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.At v6 .
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