NAME

tty − get the terminal’s name

SYNOPSIS

tty [ −s ]

DESCRIPTION

Tty prints the path name of the user’s terminal.  The −s option inhibits printing of the terminal’s path name, allowing one to test just the exit code. 

EXIT CODES

2if invalid options were specified,
0if standard input is a terminal,
1otherwise. 

DIAGNOSTICS

“not a tty” if the standard input is not a terminal and −s is not specified. 

Version 3.6  —  December 20, 1987