> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of Paul Gilmartin > Sent: Wednesday, June 27, 2007 2:40 PM > To: [email protected] > Subject: Re: Why do we need BPXBATCH, JZOS et. al.? > > > On Wed, 20 Jun 2007 10:58:13 -0400, Tim Hare wrote: > > >That's like asking why we need IKJEFT01 to run TSO commands > in batch. The > >commands need an environment which supplies the services needed to > >execute. > > > But yet, why must the environments be so different? Why doesn't > foreground TSO do QSAM I/O to SYSTSIN and SYSTSPRT allocated to > UNIT=TERMINAL rather than providing the idiosyncratic TGET and TPUT? > Why was the venerable OS/360 paradigm of device-independent I/O > forsaken? > > -- gil
A good question. I don't know who designed TSO back in the OS/360 days, when it was indeed an "option". But we're just stuck with it. Perhaps the QSAM/BSAM folks didn't want to implement it and "bloat" their code? I don't remember how the original TCAM based TSO worked. Perhaps a QSAM interface to TCAM was considered too difficult? Or there were time constraints. And, now come along UNIX with some of the same problems. But I at least can understand why a fork()'ed program does not have access to the parent's DD statements while it does have access to the parent's UNIX file descriptors. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. ---------------------------------------------------------------------- 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
