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TTY(1)                    BSD 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.

     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 function is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.

BSD                              June 6, 1993                              BSD