🚀 go-pugleaf

In sys5 if you open:
	x = open("/dev/ttyx",O_RDWR|O_NDELAY,0)
it will succeed even if there is no carrier on the line.  This is
documented in open(2).

CLOCAL doesn't seem to do much, except determine whether a subsequent open
without the O_NDELAY will wait for carrier or not.  So you do the open above,
diddle CLOCAL if you want & then you can do another open if you want to wait
for carrier.  CLOCAL probably also toggles DTR.  I gleaned this information
from the dialer (which I use all the time) posted by Gene Olson from
Quest Research last fall.

	../Dave Mason,	TM Software Associates	(Compilers & System Consulting)
	..!{utzoo seismo!mnetor utcsri utgpu lsuc}!tmsoft!mason