Call ‘ CHECK1’ ‘SYS1.MACLIB,
Check1 CSECT
Reg1 points to arg
MVC. Locat(44),
Locate CAMLIST
Br 14
Rc=0. DSN exists
Rv=4. DSN doesn’t exist
Sent from my iPhone
No one said I could type with one thumb
> On Dec 30, 2023, at 11:33, Binyamin Dissen <[email protected]> wrote:
>
> On Fri, 29 Dec 2023 14:47:29 +0000 Seymour J Metz <[email protected]> wrote:
>
> :>I need to check whether any of a list of datasets exists and whether any of
> a list of ddnames is allocated. I'd rather not trap and parse the output of
> LISTALC and LISTCAT, and I'd rather not call LISTDSI for each one. Is there a
> simple way to do that in REXX, or would it be better to write a small service
> routine in assembler?
>
> :>I don't have a requirement to handle XTIOT.
>
> The elephant in the room - why?
>
> Perhaps there is a better way to do what you want.
>
> As you are worried about performance, it appears to be something that will
> need to run quite often. How will you use this information?
>
> --
> Binyamin Dissen <[email protected]>
> http://www.dissensoftware.com
>
> Director, Dissen Software, Bar & Grill - Israel
>
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