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Re: full_read depends on incoming errno

From: Eli Zaretskii
Subject: Re: full_read depends on incoming errno
Date: Thu, 21 Feb 2013 19:50:17 +0200

> Date: Thu, 21 Feb 2013 09:39:50 -0800
> From: Paul Eggert <address@hidden>
> CC: Andy Wingo <address@hidden>, address@hidden, address@hidden
> On 02/21/13 09:36, Eli Zaretskii wrote:
> >> Otherwise, full_read sets errno to 0 if it returns a length less than
> >> > the length we asked for
> > Where does it do that?  I don't think I see this.  Maybe I'm blind.
> No, it's just hard to see.
> It's the line "errno = ZERO_BYTE_TRANSFER_ERRNO;" in full-write.c,
> assuming that the problem is merely an EOF.

Ah, OK, it's because of the loop in full_rw, which will try reading
again after returning too few bytes.  Makes sense.

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