dave@ucms.UUCP (Dave Settle) (06/14/90)
I have just received the new release of UNIX V.3 from UNISYS (3.00.11.14,
they call it), which is a version of V.3.2 UNIX. I need to know how to get
at the tty structure in the kernel.
Unfortunately for me, the kernel hash a problem with the tty driver, so that I
can't open a tty port if the carrier is not present, even if I use O_NDELAY
in the open call.
i.e.
open("/dev/tty300", O_RDWR | O_NDELAY)
hangs if carrier not present.
There is also a further bug, in that ports connected to modems become
inaccessible after a time, as the 'open' call will hang IRRESPECTIVE of
carrier status.
Since UNISYS in the UK don't seem to have any clues about what causes this,
I thought that I'd try to look in the tty structure in the kernel, to see
if I could find out what was going on ....
The problem is that I can't find the address of the tty table: there
doesn't seem to be a relevant address in the kernel name list.
Any information would be welcome.
Cheers,
Dave
--
Dave Settle, Universal (CMS) Ltd, Thames Tower, Burleys Way, Leicester, UK.
dave@ucms.co.uk (someday) uunet.uu.net!mcvax!ukc!nott-cs!ucms!dave
dave@ucms.uucp (today)
To see a World in a grain of Sand / And a Heaven in a Wild Flower,
Hold Infinity in the palm of your hand / And Eternity in an hour. [Blake]