Using DD name get file name

Manigandan Aravindhan · New User Joined: 09 Oct 2007 Posts: 81 Location: India

Hi Friends,
I have to retrieve the name of the file allocated in the region using the DD name.

I tried using DFHCSD VSAM file and it found so tricky to get the file name.

Is there any other simple way to get the file name using DD name using Batch?

Bill O'Boyle · Posted: Tue Sep 22, 2009 4:37 pm

In the CICS System Programming Reference for your version/release, review the INQUIRE FILE API.

Note that the translator option SP must be specified in your translation step, which some shops don't allow.

Check with management first.

Bill

dramadasa · New User Joined: 16 Sep 2009 Posts: 1 Location: India

If you know the file name, hope you can specifiy directly with DD Name.

Manigandan Aravindhan · New User Joined: 09 Oct 2007 Posts: 81 Location: India

Hi Bill,
I have to use it in a JCL.

Bill O'Boyle · Posted: Tue Sep 22, 2009 8:50 pm

In the step prior to running the program step, execute a REXX EXEC, using the LISTDSI function and the FILENAME keyword, which will return (amongst other info), the DSN.

Move the DSN returned from REXX to a temporary dataset and either pass it to the program in the next step as a parm or in the temporary dataset which the program reads.

Bill

Manigandan Aravindhan · New User Joined: 09 Oct 2007 Posts: 81 Location: India

Hi Bill,
Im pleased to use the REXX, but if i give LISTDSI function:

where do i get Filename?
Which region will REXX access?

I have DD name and i have to get File name from the region for the corresponding DD name.....

Bill O'Boyle · Posted: Wed Sep 23, 2009 7:22 pm

If you code the following DD (just an example) to be used with the REXX EXEC -

Manigandan Aravindhan · New User Joined: 09 Oct 2007 Posts: 81 Location: India

Bill, I have DD name and I have to get file name......

dbzTHEdinosauer · Posted: Wed Sep 23, 2009 8:12 pm

I can see a problem with file names changing everyday - idiots still use date in the file name.

how often do you change file names in CICS?

what does your batch process do?

Bill O'Boyle · Posted: Wed Sep 23, 2009 8:27 pm

If REXX will not work for you, then another method would be to write an EXCI program, passing the DD name in the commarea to the target CICS region, allowing for a 44-byte DSN to be returned in the commarea, as well as a 20-byte RETCODE area.

Note that the file needs to be OPEN and ENABLED (you can issue a SET command as soon as the CICS program gains control) and once you obtain the DSN and move it to the commarea, you must issue a CLOSE, using either UNENABLED or DISABLED, which is also a SET command.

Also, the target region needs to be up and active.

Review the EXCI interface in your applicable "CICS External Interfaces Guide", associated with your particular verson/release.

IIRC, EXCI was first introduced with CICS/ESA 4.1.

Bill

dominickim · New User Joined: 28 Feb 2007 Posts: 65 Location: NS, CA

Hello Manigandan,

Have you used IKJEFTSR program before? TSO command LISTALC with STATUS gives you all DD names with associated file names.

Earl Haigh · Active User Joined: 25 Jul 2006 Posts: 475