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Date: Fri, 28 Dec 2018 17:00:36 -0500
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: getspnam: errno=ENOENT for absent user

On Wed, Dec 26, 2018 at 10:47:19AM -0500, Rich Felker wrote:
> On Wed, Dec 26, 2018 at 01:29:17PM +0100, Szabolcs Nagy wrote:
> > * Philippe Grégoire <pg@...egoire.xyz> [2018-12-25 17:07:14 -0500]:
> > > I'm working with saltstack on Alpine Linux and am getting trouble
> > > managing users. I tracked the problem down to musl and the fact
> > > that getspnam sets errno to ENOENT when a user is missing. This
> > > behavior differs from glibc which leaves errno to 0 and makes
> > > the user relies on the return value; when the name is missing.
> > > 
> > > Semantically, ENOENT makes sense, but this is breaking compatibility
> > > with other softwares, at the moment. I'll send a patch over to
> > > saltstack so that current systems are supported, but believe it
> > > should be fixed here too for future compatibility. What do you think?
> > 
> > based on
> > 
> > http://pubs.opengroup.org/onlinepubs/9699919799/functions/getpwnam.html
> > "If the requested entry was not found, errno shall not be changed."
> > 
> > this should be fixed in musl.
> 
> Thanks for checking this. I'll write and commit a fix.

Should be fixed in commit 9db81b862d95326d43af7c7fae9078ad9ff5bd6f
with a related tweak in de7dc1318f493184b20f7661bc12b1829b957b67.

Rich

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