From https://www.ibm.com/docs/en/zos/3.1.0?topic=shells-introduction-zos: An introduction to the z/OS shells There are two shells available for use on z/OS UNIX System Services: The z/OS shell.
* The tcsh shell. The z/OS shell is modeled after the UNIX System V shell with some of the features found in the Korn shell. As implemented for z/OS UNIX System Services, this shell conforms to POSIX standard 1003.2, which has been adopted as ISO/IEC International Standard 9945-2: 1992. The tcsh shell is an enhanced but compatible version of csh, the Berkeley UNIX C shell. It is a command language interpreter that can be used as a login shell and as a shell script command processor. --- In other words, the z/OS shell seems to be independently developed by IBM and is based on both the Unix System V shell and the Korn shell. I think the fact that Korn and Kern are similar names is just coincidence. ________________________________ From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Rick Troth <0000058ff5c2d0a7-dmarc-requ...@listserv.ua.edu> Sent: Monday, January 27, 2025 6:33 AM To: IBM-MAIN@LISTSERV.UA.EDU <IBM-MAIN@LISTSERV.UA.EDU> Subject: Re: OMVS I don't recall if OMVS ever included the Korn shell. Haven't paid close enough attention. > (C) Copyright *Mortice Kern* Systems, Inc., 1985, 1996. The Mortice Kern Toolkit (MKS Toolkit) was also available for Windoze in those days, an excellent "front" on an otherwise non-POSIX system, very similar to what CYGWIN does. I remember requesting MKS TK from my management at the time, but since it's a charge-for product they always wanted more justification than I could muster. Naturally I then landed on CYGWIN which was somewhat of a toy until around 2005. I was delighted to see MKS Toolkit as a significant part of OMVS because I had seen and used it in the Microsoft world and it worked well there. Never seen "Kern" apart from "Mortice", so I took "kern shell" to be a typo for "korn shell". -- R; <>< On 1/26/25 3:26 PM, Mike Schwab wrote: > IBM > Licensed Material - Property of IBM > 5694-A01 Copyright IBM Corp. 1993, 2011 > (C) Copyright *Mortice Kern* Systems, Inc., 1985, 1996. > (C) Copyright Software Development Group, University of Waterloo, 1989. > > All Rights Reserved. > > U.S. Government Users Restricted Rights > Use, duplication or disclosure restricted by > GSA ADP Schedule Contract with IBM Corp. > > IBM is a registered trademark of the IBM Corp. > > > On Sun, Jan 26, 2025 at 12:51 PM Paul Gilmartin < > 0000042bfe9c879d-dmarc-requ...@listserv.ua.edu> wrote: > >> On Sun, 26 Jan 2025 18:12:01 +0100, Radoslaw Skorupka wrote: >>> ... >>>> How does Kern shell compare with Bourne shell and POSIX shell? >>>> >>>> A quick Google search for "Kern shell" returns mostly pages about >>>> psychology or thermal engineering. >>> Obvious typo. Was it funny? >>> >> More than I care to know about heat exchangers. >> >>> https://en.wikipedia.org/wiki/KornShell >>> >> And I doubt that I mistyped. I copied "Kern shell" with mouse from >> an earlier ply and pasted directly into the query string. >> >> And there seems to be a passing reference in an IBM page: >> < >> https://www.ibm.com/docs/en/zos/3.1.0?topic=procedures-accessing-unix-system-services-zos-unix-shell >> -- gil >> >> ---------------------------------------------------------------------- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN >> > -- -- R; <>< ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
