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Date:	Wed, 23 Apr 2014 18:44:43 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Cygwin's writev() non-standard behavior
Message-ID:	<20140423164443.GP2339@calimero.vinschen.de>
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On Apr 23 17:48, qq qq wrote:
> > I applied a patch to CVS.
>=20
> Thanks. =C2=A0Although I could not see it in ViewVC -- the page stops loa=
ding at the "configure" script.
>=20
> Anyhow, I suppose that check_iovec still returns EINVAL for count=3D=3D0 =
in any read functions: =C2=A0simply returning
> "tot"=3D=3D0 means EOF in many (if not all) of them.

That's perfectly ok:

  If count is zero, read() may detect the errors described below.  In the
  absence of any errors, or if read() does not check for errors, a read()
  with a count of 0 returns zero and has no other effects.

This behaviour is also fine for readv.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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