MESG(1)                              SysV                              MESG(1)



NAME
     mesg - permit or deny messages

SYNOPSIS
     mesg [ -n ] [ -y ]

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

FILES
     /dev/tty*

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

SEE ALSO
     write(1).