tty

tty is a Unix process that controls the properties of data transfer
from and to your host.
It is also a commando that gives you the name of a device file on your terminal.

NAME
     tty - print the device name of this tty

SYNOPSIS
     tty [-s] 

OPTIONS

     -s   silent mode, only the exit status is affected

EXAMPLES

     tty       # print the tty name


DESCRIPTION

     Print the name of the controlling tty. If the flag -s is given, 
tty is equivalent to the call test -t 0.

SEE ALSO
     ttyname.
note: These descriptions are also available when typing man [commandname]

in the minix prompt.