Re: using exec to close a fd in a var crashes bash

[Andreas Schwab]

On Aug 23 2023, Greg Wooledge wrote:

> Then again... leaving an FD open in a shell script usually won't matter,
> because the script will exit, and that'll just take care of it.  The
> only times it actually matters are long-running bash processes -- either
> interactive shells, or some kind of weird daemon that's been implemented
> in bash for some reason -- or scripts that open and (fail to) close lots
> of temp FDs in a loop.

It will also cause the open FD to be passed to all subsequent commands,
and keeps a reference to the underlying file, which may affect EOF
processing if the file is a pipe.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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