-----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Paul Gilmartin Sent: Monday, February 23, 2009 7:01 PM To: [email protected] Subject: Re: Pedantic Tape Analyzer?
On Mon, 23 Feb 2009 19:31:09 -0500, Thompson, Steve wrote: <SNIPPAGE> >I don't know if you want to go this far, but if your tape utility is >also going to have some part(s) that are not fully "attached" (that is, >must be linked to your main routines), you could "put" them into the >"system" Label Exit (DFP/DFSMS part of the system?). I know it exists, >but I don't know the name. I know you can use it to handle things for AL >tapes (that's how I stumbled upon its existence about 8 months ago). > Can this be done in a way that's nondisruptive; transparent to users other than me? <SNIP> To my knowledge, you can put out WTOs in the JOBLOG. If they pay attention to them, then it won't be so transparent. But after reading more and having a better understanding of what you want to do, forget I even mentioned the exit points. <snip> >During the pass to the exit of the label(s), you could verify that they >match the VOL1 contents. I don't know when or how that exit point is >invoked for trailer labels. > Can this be written in Rexx? IANASP. IANAHLASMP. <SNIP> AFAIR, no, this must be assembled and linked and AC=1 type stuff. <SNIP> >Otherwise, you will probably have to satisfy yourself with the DCB label >exit point -- unless you want to do EXCP and BLP :-) . > Currently, I'm using BLP, RECFM=U, and LMGET. That's how I noticed the discrepancy between the VOL1 and HDR1 volsers. Further thought: How about validating SDWs? Continuation bits valid, and continuation allowed only when RECFM=VBS? Etc. (Relentlessly pedantic.) <SNIP> I think you can do all you are trying to do with REXX as long as you are specifying RECFM=U. You will have some fun handling all of this. It almost sounds like you are trying to write part of DITTO. Regards, Steve Thompson -- Opinions expressed by this poster may not be those of poster's employer. -- ---------------------------------------------------------------------- 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
