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Date: Sat, 13 Apr 2024 18:54:04 +0300
Message-Id: <86v84lntr7.fsf@gnu.org>
From: "Eli Zaretskii (eliz AT gnu DOT org) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
To: Pali <pali AT pali DOT im>
Cc: dj AT delorie DOT com, sezeroz AT gmail DOT com, djgpp AT delorie DOT com
In-Reply-To: <20240413122345.sq2ua43ugmshrlhv@pali> (message from Pali on Sat,
	13 Apr 2024 14:23:45 +0200)
Subject: Re: Error handling in __djgpp_set_page_attributes()
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> Date: Sat, 13 Apr 2024 14:23:45 +0200
> From: Pali <pali AT pali DOT im>
> Cc: dj AT delorie DOT com, sezeroz AT gmail DOT com, djgpp AT delorie DOT com
> 
> On Saturday 13 April 2024 15:10:34 Eli Zaretskii wrote:
> > > +              default: /* Other unspecified error */
> > > +                errno = EIO;
> > > +                break;
> > 
> > Why EIO and not the original EACCES?
> 
> EACCES is "Permission denied" error.

I believe it's "Access denied" ("Permission denied" is EPERM).

EACCES was what we returned previously, isn't it?  So why is it bad to
fall back on it?  EIO is basically inappropriate at least the same as
EACCES: there's no "I/O" here, right?

> > Also, can you collect all EFAULT cases in the switch together?
> 
> I sorted cases by dpmi error values. But EFAULT cases can be grouped
> easily, for example by moving case 0x8002 above case 0x8023.

Yes, please.