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From: Sebastian Gniazdowski <sgniazdowski@gmail.com>
Date: Thu, 15 Sep 2016 08:41:38 +0200
Message-ID: <CAKc7PVA9OFBhUbkYgMD8LUGM6=CtmpxDQBNJuBeR=U9kboYeCg@mail.gmail.com>
Subject: Re: Do file descriptors survive to subshell?
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: Zsh Users <zsh-users@zsh.org>
Content-Type: text/plain; charset=UTF-8

On 14 September 2016 at 19:53, Bart Schaefer <schaefer@brasslantern.com> wrote:
> Under "Conditional Expressions":
>
> [...]
>
> -r FILE
>      true if FILE exists and is readable by current process.
>
> [...]
>
> In each of the above expressions, if FILE is of the form `/dev/fd/N',
> where N is an integer, then the test applied to the open file whose
> descriptor number is N, even if the underlying system does not support
> the /dev/fd directory.
>
> [...]
>

Should have just read about all the tests, thanks

Best regards,
Sebastian Gniazdowski