Hello,

on Wed, 13 Oct 2021 14:06:27 +0000 you ("(GalaxyMaster)"
<galaxy@openwall.com.au>) wrote:

> Hello,
> 
> I am not a true developer, so I don't have the POSIX standard handy,
> hence could not quickly find whether the observed behaviour is
> correct or not.  I have two systems, one is musl-based and the other
> is Glibc-based, so every time I stumble upon something I check
> against Glibc.  I know that Glibc developers did quite a few bespoke
> things, but this particular one made me wonder whether it is a bug in
> musl.
> 
> Longs story short, it seems that musl's strto*() set errno when it is
> unable to find a legitimate number at the begining of the string:
> ...

This function is actually in C, but the possible `errno` specification
comes seemingly from POSIX:

       The implementation may also set errno to EINVAL in case no
       conversion was performed (no digits seen, and 0 returned).

Jₑₙₛ

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