(* TEST
 include unix;
 stdin = "/dev/null";
 stderr = "/dev/null";
 hasunix;
 {
   bytecode;
 }{
   native;
 }
*)

Printf.printf
  "Unix.isatty Unix.stdin = %b\n\
   Unix.isatty Unix.stdout = %b\n\
   Unix.isatty Unix.stderr = %b\n"
  (Unix.isatty Unix.stdin)
  (Unix.isatty Unix.stdout)
  (Unix.isatty Unix.stderr)