June 6, 1993 TTY 1

### NAME

tty - return user's terminal name

### SYNOPSIS

tty [-s]

### DESCRIPTION

The tty utility writes the name of the terminal attached to standard input to standard output. The name that is written is the string returned by ttyname(3). If the standard input is not a terminal, the message ``not a tty'' is written. The options are as follows:

-s
  Don't write the terminal name; only the exit status is affected when this option is specified. The -s option is deprecated in favor of the `````test -t 0`'' command.

tty exits 0 if the standard input is a terminal, 1 if the standard input is not a terminal, and >1 if an error occurs.

### SEE ALSO

test(1), ttyname(3)

### STANDARDS

The tty utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'') .