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.

     EXAMPLE
               mesg y

          changes the permission to ``yes'' and the system reports:

               Is Yes; Was No

          or whatever is the current and former state of your message
          permission.

     FILES
          /bin/msg
          /dev/tty*

     SEE ALSO
          write(1).

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























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