Not necessarily. Your customers can still install cpint and you would
not have to worry about vmcp. Choice is a wonderful thing.
Rick Troth wrote:
As an ISV, I must say that it is FRUSTRATING
to have to code my products to now look for additional commands.
Up to now, our customers would install CPINT or we would employ
a work-around. But now, I have to dig around for 'vmcp',
which also will be in flux for a while. ARGH!!!
But ... I digress ... to the more productive conversation:
On Mon, 10 Oct 2005, Martin Schwidefsky wrote:
There is obviously a clash between what a CP programmer expects to see
as the return code and what a Linux programmer wants to see.
Indeed.
One of the better aspects of the CPINT package is /dev/diag8
(or "/dev/cpint8"). You can use it as a character file
(that is, write commands to it, read responses from it)
but you can also perform ioctl() to recover the return code.
I always took it (as a VMer) that CPINT was the foundation of an
eventual wider complement of DIAGnose operations, along the lines
of CMS REXX Diag() and DiagRC() functions. IF THAT WERE TRUE,
then we would soon enjoy Diag() and DiagRC() extensions to Regina.
Wouldn't that be sweet!
Oh the pain of re-invented wheels ... this is what we need:
regs.Rx = "command";
regs.Rx1 = responsebuffer;
regs.Ry = 0;
regs.Ry2 = sizeof(responsebuffer);
cc = diag(8,®s);
... where diag(8,) opens /dev/diag8 under the covers and does all
the right stuff by some ioctl() magic. Hard to do without the flat
memory model of CMS, but possible. The CP programming interfaces
of z/VM are well known and well documented and really quite robust,
even if they're not pretty to Unix eyes.
-- R;
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Rich Smrcina
VM Assist, Inc.
Main: (262)392-2026
Cell: (414)491-6001
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rich.smrcina at vmassist.com
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WAVV 2006 - Chattanooga, TN - April 7-11, 2006
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