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From: Martijn Dekker <martijn@inlv.demon.nl>
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Subject: Re: Cleaning up background processes
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Op 10-05-2024 om 13:57 schreef Janis Papanagnou:
> BTW, I'm astonished about the "undefined results" for KILL/STOP. Yes,
> on OS-level they cannot be caught but why undefined behavior on shell
> level; what is the reason or practical rationale for that?

I suspect it was to allow the shell to error out on an attempt to trap those 
signals. As far as I know, yash is the only shell that actually does that.

-- 
||    modernish -- harness the shell
||    https://github.com/modernish/modernish
||
||    KornShell lives!
||    https://github.com/ksh93/ksh