Heiko Schlittermann via Exim-dev <exim-dev@???> (Mi 28 Jun 2017 00:16:11 CEST): > Hi,
>
> I'm sitting with bug 2130 and I'm wondering if anybody knows how
> portable readv(2) and writev(2) are, on the platforms we'd like to
> support.
pwcheck.c uses writev(2) as does malware.c.
So it seems to be supported on the supported platforms.