ade04bb89c
There is value in ensuring that manual page sections use consistently
named sections, as far as possible, and also that sections have a
consistent order within manual pages. This is one of a series of patches
to place manual page sections in a consistent order.
In this patch, we ensure that the AUTHORS, COPYRIGHT, SEE ALSO, and
AVAILABILITY sections are always placed at the end of the page.
Testing that no gross editing mistake (causing accidental loss or addition
of text) was performed as follows:
$ cat $(grep '\.SH' -l $(find . -name '*.[1-9]') |sort) | sort > a
[Apply patch]
$ cat $(grep '\.SH' -l $(find . -name '*.[1-9]') |sort) | sort > b
$ diff a b
$ echo $?
0
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
118 lines
3.8 KiB
Groff
118 lines
3.8 KiB
Groff
.\" 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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.TH MESG 1 "July 2014" "util-linux" "User Commands"
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.SH NAME
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mesg \- display (or do not display) messages from other users
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.SH SYNOPSIS
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.B mesg
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[option]
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.RB [ n | y ]
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.SH DESCRIPTION
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The
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.B mesg
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utility is invoked by a user to control write access others have to the
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terminal device associated with standard error output. If write access
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is allowed, then programs such as
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.BR talk (1)
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and
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.BR write (1)
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may display messages on the terminal.
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.PP
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Traditionally, write access is allowed by default. However, as users
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become more conscious of various security risks, there is a trend to remove
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write access by default, at least for the primary login shell. To make
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sure your ttys are set the way you want them to be set,
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.B mesg
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should be executed in your login scripts.
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.PP
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The
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.B mesg
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utility silently exits with error status 2 if not executed on terminal. In this
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case execute
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.B mesg
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is pointless. The command line option \fB\-\-verbose\fR forces
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mesg to print a warning in this situation. This behaviour has been introduced
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in version 2.33.
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.SH ARGUMENTS
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.TP
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.B n
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Disallow messages.
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.TP
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.B y
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Allow messages to be displayed.
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.PP
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If no arguments are given,
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.B mesg
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shows the current message status on standard error output.
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.SH OPTIONS
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.TP
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.BR \-v , " \-\-verbose"
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Explain what is being done.
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.TP
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.BR \-V , " \-\-version"
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Display version information and exit.
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.TP
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.BR \-h , " \-\-help"
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Display help text and exit.
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.SH EXIT STATUS
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The
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.B mesg
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utility exits with one of the following values:
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.RS 4
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.TP
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.B "\ 0"
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Messages are allowed.
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.TP
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.B "\ 1"
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Messages are not allowed.
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.TP
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.B ">1"
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An error has occurred.
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.RE
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.SH FILES
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.I /dev/[pt]ty[pq]?
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.SH HISTORY
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A
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.B mesg
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command appeared in Version 6 AT&T UNIX.
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.SH SEE ALSO
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.BR login (1),
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.BR talk (1),
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.BR write (1),
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.BR wall (1),
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.BR xterm (1)
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.SH AVAILABILITY
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The mesg command is part of the util-linux package and is available from
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https://www.kernel.org/pub/linux/utils/util-linux/.
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