On Fri, Dec 1, 2017 at 3:49 PM, Walt Farrell <[email protected]> wrote:
> On Fri, 1 Dec 2017 15:09:07 -0600, John McKown < > [email protected]> wrote: > > > >I didn't go into the really weird experimentation that I'm doing. I'm a > >just "messing around" with the BPX1EXM (execmvs) UNIX function. This is a > >real weirdie (to me). It basically terminates the current job step, then > >_inserts_ a new job step (which shows up with *OMVSEX as the step name) > >immediately _after_ the current job step and _before_ the next JCL job > >step. I'm still in the same ASID, but all the JCL has disappeared and all > >the user allocated memory is gone (non APF can't get LSQA which would > >survive). Now, I can pass up to 32767 bytes from my program to the next > >program via the standard "batch" PARM= equivalent. This can be arbitrary > >byte values (range x'00' to x'FF'). So I'll probably just use that > >facility. Hopefully I will never need more than 32767 bytes. Hum, could it > >really be x'FFFF' bytes? I'll need to check that out. > > > >I'm just messing around with this and wanted an easy way for my invoker to > >send more data to the invokee. I could cheat and use UNIX message queues. > >But they are not cleaned up at job end. > > Wouldn't it be more "UNIX-ish" if you forked, then did the execmvs in the > new address space? You could create a pipe to transfer the data between the > two. > Very true. I'm still just "messing around" and if I can do something with BPX1EXM instead of doing a fork() or spawn(), I'll use less resource. Also, the output from the "inserted step" (like WTOs et al.) show up in the job's JESMSGLG instead of "somewhere else" with nothing showing in the original job. I'm pretty sure that's correct. I may check it out -- but it's go home time, so I'm outta here! > > -- > Walt > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- I have a theory that it's impossible to prove anything, but I can't prove it. Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
