Checking existence of a dataset

kalais · New User Joined: 18 Apr 2006 Posts: 22

hi

In REXX programming
how i can check wether a data set(PS/PDS) is existing or not.

superk

There is no purely REXX function that does what you want. However, there are some things you can do:

1. If you run your REXX exec outside of a TSO/E address space, you can call the IDCAMS utility with the LISTCAT function, and then query the resulting return-code value.

2. If you run your REXX exec within a TSO/E Address space, you can do one of the following:

A. Use the TSO command LISTDS.
B. Use the TSO command LISTCAT.
C. Use the TSO/E REXX functions SYSDSN or LISTDSI.

DwChilders · New User Joined: 14 Apr 2006 Posts: 7

I use something like

IF SYSDSN("'ID.T.AAAA.BBBB(WHATTHE)'") <> "OK" then
strMesssage = "Where is the PDS with the WHATTHE member?"

subramaniabharathi · New User Joined: 09 Mar 2006 Posts: 9

you can check existense of a dataset using sysdsn command
x=sysdsn("'"ps or pds name"'")
if x is equal to ok then the ps or pds exists
if x is dataset not found then the dataset does not exist

punith007 · New User Joined: 16 May 2006 Posts: 11

I have a requirement. I have to check for the existence of some files in the unix side from mainframe (normally i write files from mainframe to unix). If it is present , i have to delete it. Is that possible by using REXX ?

FYI -- the files will reside in a unix directory as like apps/abcd/aaaXX.txt,
apps/abcd/bbbXX.txt., etc

If possible can you help me with some sample codes ?

Thanks
Punith