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 termi-
     nal.  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.