On Mon, 24 Apr 2006 14:40:51 -0400 Thomas David Rivers <[EMAIL PROTECTED]> wrote:
:>I've got a question for the group-at-large, which I hope :>will be obvious to someone deeply in-the-know. :>I've got a program that opens a VB PDS (RECFM=VB,BLKSIZE=2550,LRECL=255). :>But - note that I said it opens the PDS, not a member of the PDS. That :>open succeeds, and presumably, the program will merrily try to :>read the PDS directory as Format-V records. :>So - the first read succeeds, and it gets these bytes back for :>the first 6: :> 000EFFFF FFFF :> | BDW | | RDW .... :>The BDW indicates a block-len of 14, but the 'reserved' bytes are not 00. :>The RDW then indicates a record length of 65535 - which is preposterous :>given that the BDW said the entire block-len was only 14. :>And - of course, trying to read 65531 bytes for the remaining record :>doesn't work, because they aren't there. The 14 isn't there either. :>OK - admittedly - walking thru the directory entries and trying :>to interpret that as VB isn't the best thing in the world... but, :>what's a program "to do" with what the user types. :>Should it look at the lrecl/blksize in the DCB and decide that :>this doesn't make sense? What if it did make sense - then what? :>Or - is there a way to know this is a bunch of bytes from a :>PDS directory... and this READ doesn't make sense? It is not clear what your question is. Are you asking if there is a way to determine if a DD statement is pointing to a PDS without a member name specified? -- Binyamin Dissen <[EMAIL PROTECTED]> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
