_SC_XOPEN_STREAMS vs _XOPEN_STREAMS vs _SC_STREAMS

[Florian Weimer]

On 05/28/2013 08:53 PM, Игорь Пашев wrote:
> Hi!
>
> I'm looking at "sysdeps/posix/sysconf.c" and see that:
>
> sysconf(_SC_STREAMS) = _XOPEN_STREAMS
> sysconf(_SC_XOPEN_STREAMS) = -1
>
>
> But according to "The Open Group Base Specifications Issue 7" [2]
> sysconf(_SC_XOPEN_STREAMS) should be _XOPEN_STREAMS

How is this observable, considering that _XOPEN_STREAMS is defined this way?

/usr/include/bits/posix_opt.h:#define _XOPEN_STREAMS	-1


-- 
Florian Weimer / Red Hat Product Security Team