On 12/21/24 7:29 PM, Robert Elz wrote:
I'm not sure of its origins (it was proposed to POSIX decades ago), Chet can confirm, but I suspect bash picked it up from the proposal to POSIX.
It predated that. There was a group of shell implementors who got together to discuss possible POSIX extensions, and it came out of that. By the time David Wheeler proposed it, bash, ksh93, and zsh had implementations. The original proposal dates from 2010: https://www.austingroupbugs.net/view.php?id=249 Chet -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/
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