On 25 Nov 2004 at 16:09, Joachim Van der Auwera wrote:
Wolfgang Lenerz wrote:
> On 24 Nov 2004 at 20:21, Rich Mellor wrote:
>>OK that should fit on a Trump Card, especially if the FILTER THING can
>>give the device driver the option of sending the output to a file instead
>>of a pipe.
>
>
> To to this within the device driver will be a non trivial task because you
> wil have to open a filing system channel from withing the open call of a non
> filing system device driver.
That's what the FILTER THING would be very good for.
Probably not (?).
I presume the 'thing' use call would open the channel to the filing system.
If you call the thing use routine from within the PFF channel open call
(which is what I see proposed), you have the same problem as you will STILL
be within the channel open call when using the 'thing'!
Hmm - had not thought of that .....
Guess the FILTER THING could open the channel ready until the PFF device calls for its use... In that way the open call will be entirely outside of the PFF device call.
-- Rich Mellor RWAP Services 26 Oak Road, Shelfield, Walsall, West Midlands WS4 1RQ
http://www.rwapservices.co.uk/
_______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
