* Copyright (c) 1988 Regents of the University of California.
* %sccs.include.redist.c%
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
static char sccsid
[] = "@(#)tty.c 4.4 (Berkeley) %G%";
while ((ch
= getopt(argc
, argv
, "s")) != EOF
)
fputs("usage: tty [-s]\n", stderr
);
puts(t
? t
: "not a tty");