That's why I mentioned z/OS 1.11, which extended the automatic EOF to non-SMS allocations.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of Lennie Dymoke-Bradshaw [[email protected]] Sent: Wednesday, June 16, 2021 11:27 AM To: [email protected] Subject: Re: Coding for the future Shmuel (Seymour J.) Metz wrote, " Prior to DFSMS a new PS DASD data set always had the original contents until you opened it." That was my experience. But I think the writing of an EOF mark only applies to SMS managed data. I cannot find any SMS options to specify controls. Lennie -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Seymour J Metz Sent: 16 June 2021 16:02 To: [email protected] Subject: Re: Coding for the future There used to be an SMS option to write an EOF. I don't know whether z/OS 1.11 changed it to no longer be optional, but even if it is still an option I can't imagine why an installation wouldn't turn it on. Prior to DFSMS a new PS DASD data set always had the original contents until you opened it. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of Lennie Dymoke-Bradshaw [[email protected]] Sent: Wednesday, June 16, 2021 7:43 AM To: [email protected] Subject: Re: Coding for the future Clearly I am too old. I wondered if there was a setting to alter system behaviour. Where is it? Lennie Dymoke-Bradshaw -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Seymour J Metz Sent: 16 June 2021 09:27 To: [email protected] Subject: Re: Coding for the future Is any installation these days configured to not write EOF on new PS DASD files? -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of Lennie Dymoke-Bradshaw [[email protected]] Sent: Wednesday, June 16, 2021 3:42 AM To: [email protected] Subject: Re: Coding for the future Does the result depend on whether there is an EOF marker in the file? Traditionally, such EOF markers were not written to new files. I know that ISPF 3.2 does do this today, but I suspect that common (step) allocation does not. Lennie Dymoke-Bradshaw https://secure-web.cisco.com/1vnmTIoBKBMQy2Ips6r7TwKWaTHCFuIAlFkMQgxfymMedYT pRz8mYvXivQpfzjW0tn7ZndCUx184ciY1pnobuAeSQ3N7jZ01lmoar6-0raxRg1n5tG4eq0vq0Q3 MPoirYJMH6gJS3Rv3rxUUBOux8d5c88QNQycbzb8mA1C9Ab738EUGXAkXGHmlcw695ga7QSt77LT J96hctr4Tgq_Ju9SUiyajOPMp-aYPUEiG4IB7EmNHSViZThWtuwKialRRMHcb97hOvBN3BiYrgWV w3oyuO55BZAd7IYdQDAVB2dHPHktBoQoh-g-t23TvTF_2sgNmQWl42cWu36j2ZZhcOoeq-iT8qo2 9z2DwC-QUaMFB7qpL6h5JpNNQbD1syxP42TcoMTeJEjOWN4qKMYhInx9wfUhsPNy55LkiUHRU3SP 6vBlh5IGH-I0GOY4H-_0en/https%3A%2F%2Frsclweb.com 'Dance like no one is watching. Encrypt like everyone is.' -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Paul Gilmartin Sent: 16 June 2021 04:50 To: [email protected] Subject: Re: Coding for the future On Tue, 15 Jun 2021 22:43:41 -0400, Bob Bridges wrote: > >What you describe here reminds me of a function I use in many Excel programs to determine the last data row in a worksheet. I use it routinely, so it has to work even in odd circumstances such as no rows, ... > It irritates me that (AFAIK) ISPF Edit provides no way to extract the size of a file without getting a warning (RC=4) on an empty file. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
