When you execute PGM=SDSF, the initialization logic determines the environment where it has been invoked from and for the entry point of "SDSF" this can be either as a TSO command, a batch jobstep program and as a TMP. Other valid SDSF environments require different entry points (for example "ISFISP" for ISPF). FWIW we use GTSIZE returning zero for the "SDSF" entry point to determine if running as batch job.
Whether running as a TSO command or a TMP, the code path is the same. I believe that the original reason to run SDSF as a TMP was to enables customers to give remote operators access to SDSF functionality without providing other TSO command functionality. As the decades have passed this is probably not as frequently used as before, however I imagine that using SDSF this way in a emergency situation might be useful. Scanning the SDSF manuals finds a lack of explicit documentation for running SDSF as a TMP. I am unsure whether we have dropped documentation for this over the years, or if it was never explicitly stated in the manuals. I will attempt to get the manual updated as this is a supported environment. Rob Scott Rocket Software From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Seymour J Metz Sent: 30 June 2021 20:06 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: SDSF TMP EXTERNAL EMAIL Yes, and as I recall it will even parse PARM= correctly. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3<http://mason.gmu.edu/~smetz3> ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of PINION, RICHARD W. [rpin...@firsthorizon.com] Sent: Wednesday, June 30, 2021 12:19 PM To: IBM-MAIN@LISTSERV.UA.EDU<mailto:IBM-MAIN@LISTSERV.UA.EDU> Subject: Re: SDSF TMP Perhaps my wording is incorrect. But, you can use PGM=SDSF in a logon proc. I remembered that's how it was done. I tried it, and it does work. -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU<mailto:IBM-MAIN@LISTSERV.UA.EDU>> On Behalf Of Seymour J Metz Sent: Wednesday, June 30, 2021 12:18 PM To: IBM-MAIN@LISTSERV.UA.EDU<mailto:IBM-MAIN@LISTSERV.UA.EDU> Subject: Re: SDSF TMP [External Email. Exercise caution when clicking links or opening attachments.] You could execute SDSF as a TSO command, with no ISPF. You couldn't use SDSF as a TMP. -- Shmuel (Seymour J.) Metz https://urldefense.com/v3/__http://mason.gmu.edu/*smetz3__;fg!!HnnddUIWDII9UQ!ELaFSQJID_qGZRmuTK4B-jrsSqEQ9r3OdZ7KN_YLtH3KGNiWsi_He9pAWh_xLoVhIEs$<https://urldefense.com/v3/__http://mason.gmu.edu/*smetz3__;fg!!HnnddUIWDII9UQ!ELaFSQJID_qGZRmuTK4B-jrsSqEQ9r3OdZ7KN_YLtH3KGNiWsi_He9pAWh_xLoVhIEs$> ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of PINION, RICHARD W. [rpin...@firsthorizon.com] Sent: Wednesday, June 30, 2021 10:07 AM To: IBM-MAIN@LISTSERV.UA.EDU<mailto:IBM-MAIN@LISTSERV.UA.EDU> Subject: SDSF TMP Am I only dreaming, but couldn't one execute SDSF as the TSO TMP. This might have been from the 80's or 90's timeframe. Confidentiality notice: This e-mail message, including any attachments, may contain legally privileged and/or confidential information. If you are not the intended recipient(s), or the employee or agent responsible for delivery of this message to the intended recipient(s), you are hereby notified that any dissemination, distribution, or copying of this e-mail message is strictly prohibited. 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