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Re: leaks fd for internal functions but not external command

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  Re: leaks fd for internal functions but not external command Sam Liddicott <sam@liddicott.com> - 2019-07-23 16:11 +0100

#15207 — Re: leaks fd for internal functions but not external command

On Tue, 23 Jul 2019 at 16:05, Chet Ramey <chet.ramey@case.edu> wrote:

> On 7/23/19 10:33 AM, Sam Liddicott wrote:
>
> > Bash Version: 4.4
> > Patch Level: 20
> > Release Status: release
> >
> > Description:
> > Bash redirection sequence cases a file descriptor to be leaked
> > if the main command is an internal function but not if it is
> > an external command.
>
> It's not `leaked': you have a handle on it and can manipulate it as you
> wish.
>

evidently not, it got closed for me with /bin/echo so I couldn't use it as
I wish


> > Based on prior conversation, I suspect it is supposed to leak
> > in the internal case (though that is annoying) but it is
> > inconsistent that it does not for the external case.
>
> It's set to close-on-exec. If you want to use it in a child process,
> you have a handle that you can use to dup to another fd.
>

The report concerns the different behaviour with internal and external
operations.

Sam

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