mesg.1

<B>Digital的Unix操作系统VAX 4.2源码</B>

.\" SCCSID: @(#)mesg.1	8.1	9/11/90
.TH mesg 1
.SH Name
mesg \- allow or disallow messages
.SH Syntax
.B mesg
[\|\fBn\fR\|] [\|\fBy\fR\|]
.SH Description
.NXR "mesg command"
.NXA "write command" "mesg command"
.NXA "talk program" "mesg command"
.NXA "wall command" "mesg command"
.NXR "message" "prohibiting"
The
.PN mesg
command with argument
.B n
forbids messages via
.PN write
and 
.PN talk
by revoking non-user
write permission on the user's terminal.
The
.PN mesg
command with argument
.B y
reinstates permission.
All by itself,
.PN mesg
reports the current state without changing it.
.SH Diagnostics
Exit status is 0 if messages are receivable,
1 if not, 2 on error.
.SH Files
/dev/tty*
.SH See Also
talk(1), write(1)