At Thu, 5 Dec 2024 19:09:26 -0600, "G. Branden Robinson" wrote: Subject: [TUHS] Re: Pipes (was Re: After 50 years, what has the Impact of Unix been?) > > [1 ] > At 2024-12-05T16:07:10-0700, arnold@skeeve.com wrote: > > Warner Losh wrote: > > > The <() , >() syntax is a bash extension. Not all shells support > > > it. And I couldn't find them in POSIX Issue 8. > > > > It originated in ksh93. > > Are you sure? I think Tom Duff originated it in his "rc" shell. The Wikipedia entry for "Process substitution" says: Process substitution was available as a compile-time option for ksh88, the 1988 version of the KornShell from Bell Labs. The rc shell provides the feature as "pipeline branching" in Version 10 Unix, released in 1990. So, if we believe that then indeed ksh88 pioneered process substitution. -- Greg A. Woods Kelowna, BC +1 250 762-7675 RoboHack Planix, Inc. Avoncote Farms