NAME    [Toc]    [Back]

     tty - return user's terminal name

SYNOPSIS    [Toc]    [Back]

     tty [-s]

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

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

STANDARDS    [Toc]    [Back]

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

HISTORY    [Toc]    [Back]

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

OpenBSD      3.6                           June      6,      1993