TTY(1)                  System General Commands Manual                  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.

     The tty utility exits 0 if the standard input is a terminal, 1 if the
     standard input is not a terminal, or >1 if an error occurred.

SEE ALSO
     stty(1), test(1), ttyname(3), tty(4)

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

HISTORY
     A tty command appeared in Version 1 AT&T UNIX.

Interix                          June 6, 1993                          Interix