Re: Suspicion of a compiler bug in clang: using ternary operator in ereport() - Mailing list pgsql-hackers

Tom Lane wrote:
> Christian Kruse <christian@2ndquadrant.com> writes:
> > Have a look at the psprintf() call: we first have a _("failed to look
> > up effective user id %ld: %s") as an argument, then we have a (long)
> > user_id and after that we have a ternary expression using errno. Isn't
> > it possible that the first _() changes errno?
> 
> While I haven't actually read the gettext docs, I'm pretty sure that
> gettext() is defined to preserve errno.  It's supposed to be something
> that you can drop into existing printf's without thinking, and if
> it mangled errno that would certainly not be the case.

It specifically says:

ERRORS      errno is not modified.


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Álvaro Herrera                http://www.2ndQuadrant.com/
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