Malcolm,
Over the weekend I took a look at VMUR.CCP source to insert "FD_ZERO(),
FD_SET() and select()". I thought adding would be trivial.
However, when I took a look at the device driver VMUR.C on the internet, I
found that the OPEN calls diag_read_next_file and if there
are no data(no reader file) it will returns ENODATA(No data). That means when
I open the "/dev/00c" to get the file descriptor it will come back
"NO data" thus no file descriptor for the select(). Also I notice that it does
not allow OPEN in "write" mode as well.
-----Original Message-----
From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Malcolm
Beattie
Sent: Wednesday, December 01, 2010 4:47 PM
To: [email protected]
Subject: Re: Question to smsgiucv
Florian Bilek writes:
> I am looking for a possibility using the Virtual Reader under z/VM in
> z/LINUX. The idea is to process files received from a z/OS via RSCS.
> Off course I could regullarily start VMUR to poll the RDR but couldn't that
> be done much smarter with an event starting VMUR ?
I've kept meaning to add select() support or similar to vmur since
I wrote the original but it's never quite made it to the top of my
priority list. It should just be a few lines of code (catch the
unsolicited interrupt and wake any waiters) in the right place.
I'll try to take a look soon if nobody gets in there first.
--Malcolm
--
Malcolm Beattie
Mainframe Systems and Software Business, Europe
IBM UK
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