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Re: [PATCH 2/3] posix: Improve default posix_spawn implementation
- From: Andreas Schwab <schwab at suse dot de>
- To: Adhemerval Zanella <adhemerval dot zanella at linaro dot org>
- Cc: libc-alpha at sourceware dot org
- Date: Mon, 03 Jul 2017 15:02:09 +0200
- Subject: Re: [PATCH 2/3] posix: Improve default posix_spawn implementation
- Authentication-results: sourceware.org; auth=none
- References: <1494876985-21990-1-git-send-email-adhemerval.zanella@linaro.org> <1494876985-21990-2-git-send-email-adhemerval.zanella@linaro.org> <mvm7ezulvqi.fsf@suse.de> <ed432eaf-2139-6fde-51ba-b85aa06a6ac3@linaro.org> <mvmy3sakegp.fsf@suse.de> <1a5a19ea-7a20-a71c-86ce-e0f302795401@linaro.org> <mvmpodij8ux.fsf@suse.de> <81e92d4c-d294-82c9-b8ce-9c6ad316f320@linaro.org>
On Jul 03 2017, Adhemerval Zanella <adhemerval.zanella@linaro.org> wrote:
> My understanding is POSIX is not strictly regarding spurious errno writes,
> but on general information [1] it has the rationale:
>
> "In order to avoid this problem altogether for new functions, these
> functions avoid using errno and, instead, return the error number directly
> as the function return value; a return value of zero indicates that no
> error was detected."
It also notes (in section Signal Actions):
"Note in particular that even the "safe'' functions may modify the global
variable errno"
Andreas.
--
Andreas Schwab, SUSE Labs, schwab@suse.de
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