[PATCH v2] stdlib: Consolidate getentropy and adapt to POSIX 2024 semantics

[Adhemerval Zanella Netto]

On 27/03/25 11:29, Andreas Schwab wrote:
> On Mär 27 2025, Adhemerval Zanella wrote:
> 
>>   2. There is no defined error if no entropy could be obtained.
>>      It means that the function should not fail.
> 
> The standard says:
> 
>         The getentropy() function may fail if:
> 
>         [ENOSYS]
>                 The system does not provide the necessary source of entropy.
> 

The code still returns ENOSYS if getrandom() is not supported.  The question
is how to handle unexpected getrandom() issues (which should be possible
in theory).  Should I change to just return ENOSYS in this case?