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Re: xtrace output sets ERRNO to 9 (EBADF)

X-seq: zsh-workers 51188
From: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
To: Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx>, zsh-workers@xxxxxxx
Subject: Re: xtrace output sets ERRNO to 9 (EBADF)
Date: Sun, 11 Dec 2022 10:52:44 -0800
Archived-at: <https://zsh.org/workers/51188>
In-reply-to: <20221211183546.ogwicuctgxbtit6w@chazelas.org>
List-id: <zsh-workers.zsh.org>
References: <20221209141047.oyv3jsdvo5s3z6m6@chazelas.org> <CAH+w=7bpxyzFYM-sst2D5CYWHHh5R6oggfPH5n5Pcxyq=9ShmQ@mail.gmail.com> <20221210113813.GX27622@tarpaulin.shahaf.local2> <20221211183546.ogwicuctgxbtit6w@chazelas.org>

On Sun, Dec 11, 2022 at 10:36 AM Stephane Chazelas
<stephane@xxxxxxxxxxxx> wrote:
>
> > This ignores any errors from the fileno() and fclose() calls as well, though?
>
> Yes, though it's probably just  as well. Users use $ERRNO to
> detect errors while doing operations they asked for.

Exactly; xtrace shouldn't be affecting program errors.  In any case,
fileno() doesn't set errno (it's just a data structure deref, would
only fail by crashing) and zclose() already clobbers the error from
fclose().

Follow-Ups:
- Re: xtrace output sets ERRNO to 9 (EBADF)
  - From: Stephane Chazelas

References:
- xtrace output sets ERRNO to 9 (EBADF)
  - From: Stephane Chazelas
- Re: xtrace output sets ERRNO to 9 (EBADF)
  - From: Bart Schaefer
- Re: xtrace output sets ERRNO to 9 (EBADF)
  - From: Daniel Shahaf
- Re: xtrace output sets ERRNO to 9 (EBADF)
  - From: Stephane Chazelas

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