MESG(1)                                                   MESG(1)



     NAME
          mesg - permit or deny messages

     SYNOPSIS
          mesg [ -n ] [ -y ]

     DESCRIPTION
          mesg with argument n forbids messages via write(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).

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

     ORIGIN
          AT&T V.3































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