Scientific Operations



MESG(I)                      3/15/72                      MESG(I)



NAME
     mesg  -  permit or deny messages

SYNOPSIS
     mesg [ n ] [ y ]

DESCRIPTION
     Mesg  with argument n forbids messages via write by revoking
     non-user write permission on the  user's  typewriter.   Mesg
     with  argument y reinstates permission.  All by itself, mesg
     reverses the current permission.  In all cases the  previous
     state is reported.

FILES
     /dev/tty?

SEE ALSO
     write(I)

DIAGNOSTICS
     `?' if the standard input file is not a typewriter

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