Re: [PATCH] src/ext4_resize.c: set errno to 0 before the strtoull call

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Subject: Re: [PATCH] src/ext4_resize.c: set errno to 0 before the strtoull call
From: Andreas Schwab <schwab@xxxxxxxxxxxxxx>
Date: Tue, 18 Jan 2022 13:04:37 +0100
Cc: Florian Weimer <fweimer@xxxxxxxxxx>, "xuyang2018.jy@xxxxxxxxxxx" <xuyang2018.jy@xxxxxxxxxxx>, "Theodore Ts'o" <tytso@xxxxxxx>, "libc-alpha@xxxxxxxxxxxxxx" <libc-alpha@xxxxxxxxxxxxxx>, "fstests@xxxxxxxxxxxxxxx" <fstests@xxxxxxxxxxxxxxx>
In-reply-to: <496a3521-5a0c-b3ae-29bb-02fd0056525b@linaro.org> (Adhemerval Zanella's message of "Tue, 18 Jan 2022 08:49:40 -0300")
References: <1642405014-3287-1-git-send-email-xuyang2018.jy@fujitsu.com> <YeYmzJG5M0y9BcMc@mit.edu> <61E6298D.80006@fujitsu.com> <YeY6Uh8I7RlsCicw@mit.edu> <61E64FED.2010906@fujitsu.com> <eef02950-b7c2-8ab8-1e19-165383fa99b9@linaro.org> <87wnixjndg.fsf@oldenburg.str.redhat.com> <496a3521-5a0c-b3ae-29bb-02fd0056525b@linaro.org>
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.91 (gnu/linux)

On Jan 18 2022, Adhemerval Zanella wrote:

> I think this is a implementation detail, I am not aware that either C or
> POSIX now states it should initialized to any specific value (in fact, 
> POSIX at Issue 5 [1] has removed the 'The value of errno is 0 at program 
> start-up' on its description).

It's still part of the C standard, though.

-- 
Andreas Schwab, schwab@xxxxxxxxxxxxxx
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

Follow-Ups:
- Re: [PATCH] src/ext4_resize.c: set errno to 0 before the strtoull call
  - From: Adhemerval Zanella

References:
- [PATCH] src/ext4_resize.c: set errno to 0 before the strtoull call
  - From: Yang Xu
- Re: [PATCH] src/ext4_resize.c: set errno to 0 before the strtoull call
  - From: Theodore Ts'o
- Re: [PATCH] src/ext4_resize.c: set errno to 0 before the strtoull call
  - From: xuyang2018.jy@xxxxxxxxxxx
- Re: [PATCH] src/ext4_resize.c: set errno to 0 before the strtoull call
  - From: Theodore Ts'o
- Re: [PATCH] src/ext4_resize.c: set errno to 0 before the strtoull call
  - From: xuyang2018.jy@xxxxxxxxxxx
- Re: [PATCH] src/ext4_resize.c: set errno to 0 before the strtoull call
  - From: Adhemerval Zanella
- Re: [PATCH] src/ext4_resize.c: set errno to 0 before the strtoull call
  - From: Florian Weimer
- Re: [PATCH] src/ext4_resize.c: set errno to 0 before the strtoull call
  - From: Adhemerval Zanella

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