streams/pty clone device name?

[Neil M. McQuaig]

I've seen various references in streams literature and pseudo tty
literature to clone devices.  In System V it seems that the streams
clone device is supposed to be /dev/spx and the pty device /dev/ptmx.

I understand the BSD does not have these things and that one must
just try all of them until two free devices are found.  Is this the
case in Xenix.  Does SCO streams have such a clone device that does
not require us to open a particular minor device?  If so what is it
called?

Thanks.

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