4.3BSD - /usr/man/cat1/mesg.0

MESG(1)                                                                MESG(1)


NAME
       mesg - permit or deny messages

SYNOPSIS
       mesg [ n ] [ y ]

DESCRIPTION
       Mesg with argument n forbids messages via write and talk(1) by revoking
       non-user write permission on the user’s terminal.  Mesg with argument y
       reinstates  permission.   All by itself, mesg reports the current state
       without changing it.

FILES
       /dev/tty*

SEE ALSO
       write(1), talk(1)

DIAGNOSTICS
       Exit status is 0 if messages are receivable, 1 if not, 2 on error.


7th Edition                     April 29, 1985                         MESG(1)