TTY(1) —
NAME
tty − get the name of the terminal
SYNOPSIS
tty [ −l ] [ −s ]
DESCRIPTION
The tty command prints the path name of the user’s terminal.
−l prints the synchronous line number to which the user’s terminal is connected, if it is on an active synchronous line.
−s inhibits printing of the terminal path name, allowing one to test just the exit code.
| EXIT CODES | |
| 2 | if invalid options were specified, |
| 0 | if standard input is a terminal, |
| 1 | otherwise. |
DIAGNOSTICS
“not on an active synchronous line” if the standard input is not a synchronous terminal and −l is specified.
“not a tty” if the standard input is not a terminal and −s is not specified.
\*U — Version 1.0