NAME

tty − get terminal name

SYNOPSIS

tty [ -s ]

DESCRIPTION

Tty prints the pathname of the user’s terminal unless the −s (silent) is given. In either case, the exit value is zero if the standard input is a terminal and one if it is not. 

DIAGNOSTICS

‘not a tty’ if the standard input file is not a terminal. 

7th Edition  —  April 29, 1985