Date: Fri, 28 Jun 1996 20:47:20 -0400
From: dj (DJ Delorie)
Message-Id: <199606290047.UAA11413@delorie.com>
To: Demmer AT LStM DOT Ruhr-Uni-Bochum DOT De
CC: djgpp-workers AT delorie DOT com
In-reply-to: <F0B59D4F60@brain1.lstm.ruhr-uni-bochum.de> (DEMMER@brain1.lstm.ruhr-uni-bochum.de)
Subject: Re: ioctl proposal


Are there any ioctl()s that read and write, but need different sizes
for read and write?  We might want to encode the sizes in different
places (7-bits each) to allow for this:

	---- ---- ---- ---- ---- ---- ---- ----
        TTrr rrrr rWWW WWWW cccc cccc cccc cccc

T = type (dos, read, write, r/w)
r = read buffer size
w = write buffer size
c = IOCTL code

Note that some systems use part of the code as the "type" and part as
the "subtype", like 8-bits each in our case.