6 Dec
2024
6 Dec
'24
10:44 p.m.
"Greg A. Woods" <woods(a)robohack.ca> wrote:
I'd forgotten that it was optional in ksh88. It was there out of
the box in ksh93.
Arnold
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.