nss_wrapper support for musl-libc

[Dennis Schridde]

Hi Andreas!

On Dienstag, 28. Februar 2017 15:22:14 CET Andreas Schneider wrote:
> On Tuesday, 28 February 2017 12:20:00 CET Dennis Schridde wrote:
> > It seems that EAI_NONAME is about resolving the nodename only, while
> > EAI_SERVICE indicates whether the provided servname and hints represent a
> > sane combination.
> > 
> > The test specifies no nodename, only a servname. Thus musl's behaviour of
> > indicating that "the service passed was not recognized for the specified
> > socket type" seems to be spot on. Going by the specs, it seems that either
> > GNU libc's behaviour is wrong or the specification is too lax in this
> > regard.
> > 
> > Another question would be what we are actually testing here: Conformance
> > of
> > libc to POSIX, or whether nss_wrapper works as intended?
> 
> Normally I try to mimic the behaviour of glibc. Then I test on other
> platforms BSD, OpenSolaris if they differ. They often did the same as
> glibc.

I checked again with POSIX.1-2008 [1]. It has the exact same wording as the 
man-pages I quoted.

So how do we proceed from here? Shall we try to change musl's behaviour, 
because it does not conform to GNU libc? Is conformance to any valid 
interpretation of POSIX.1-2008 acceptable? Or is just my understanding of the 
specification of getaddrinfo and its errors wrong?

> I'm currently checking why BSD and Solaris nightly build are not working.

Were you able to figure out the build problems?

Best regards,
Dennis

[1]: http://pubs.opengroup.org/onlinepubs/9699919799/
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