usr/src/usr.bin/wall/wall.1

.\" Copyright (c) 1980 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"     @(#)wall.1      6.2 (Berkeley) %G%
.\"
.TH WALL 1 ""
.UC 4
.SH NAME
wall \- write to all users
.SH SYNOPSIS
.B wall
[file]
.SH DESCRIPTION
.I Wall
reads
.I file
or, by default, the standard input, until an end-of-file.
It then sends this message, preceded by ``Broadcast Message ...'',
to all logged in users.
.PP
The sender should be super-user to override any protections the
users may have invoked.
.SH FILES
/dev/tty?
.br
/etc/utmp
.SH "SEE ALSO"
mesg(1), write(1), shutdown(8)