fprintf(stderr, "Usage: iwpriv interface [private-command [private-arguments]]\n");
fprintf(stderr, " interface [roam {on|off}]\n");
fprintf(stderr, " interface [port {ad-hoc|managed|N}]\n");
fprintf(stderr, "Usage: iwpriv interface [private-command [private-arguments]]\n");
fprintf(stderr, " interface [roam {on|off}]\n");
fprintf(stderr, " interface [port {ad-hoc|managed|N}]\n");