Editing OpenVMS (section)

===POSIX compatibility===

Various official [[Unix]] and [[POSIX]] compatibility layers were created for VMS. The first of these was ''DEC/Shell'', which was a layered product consisting of ports of the [[Bourne shell]] from [[Version 7 Unix]] and several other Unix utilities to VAX/VMS.<ref name="language-1985" /> In 1992, DEC released the ''POSIX for OpenVMS'' layered product, which included a shell based on the [[KornShell]].<ref>{{cite book|title=Software Product Description - POSIX for OpenVMS 2.0|date=1994|author=Digital Equipment Corporation}}</ref> POSIX for OpenVMS was later replaced by the open-source ''GNV'' ([[GNU]]'s not VMS) project, which was first included in OpenVMS media in 2002.<ref>{{cite web|url=https://www.itec.suny.edu/scsys/vms/OVMSDOC0731/731final/6657/6657pro_008.html|date=June 2002|title=OpenVMS Alpha Version 7.3-1 New Features and Documentation Overview Begin Index}}{{Dead link|date=October 2022 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> Amongst other GNU tools, GNV includes a port of the [[Bash (Unix shell)|Bash shell]] to VMS.<ref>{{cite web|url=https://vmssoftware.com/products/gnv/|title=VSI Products - GNV|access-date=August 19, 2020|website=VSI}}</ref> Examples of third-party Unix compatibility layers for VMS include [[Eunice (software)|Eunice]].<ref>{{cite web|url=https://www.caam.rice.edu/caam/trs/82/TR82-08.pdf|archive-url=https://web.archive.org/web/20040122172302/https://www.caam.rice.edu/caam/trs/82/TR82-08.pdf|archive-date=January 22, 2004|url-status=dead|date=August 10, 1987|title=ϕnix: a Unix emulator for VAX/VMS}}</ref>