4.4BSD/usr/share/man/cat1/tty.0

TTY(1)                       BSD Reference Manual                       TTY(1)

NNAAMMEE
     ttttyy - return user's terminal name

SSYYNNOOPPSSIISS
     ttttyy [--ss]

DDEESSCCRRIIPPTTIIOONN
     The ttttyy utility writes the name of the terminal attached to standard in-
     put 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:

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

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

SSEEEE AALLSSOO
     test(1),  ttyname(3)

SSTTAANNDDAARRDDSS
     The ttttyy function is expected to be IEEE Std1003.2 (``POSIX'') compatible.

4.4BSD                           June 6, 1993                                1