O_CLOEXEC and SOCK_CLOEXEC

[Florian Weimer]

On 10/07/2015 10:04 PM, Roland McGrath wrote:
> NaCl defines them but doesn't actually support them.
> But it doesn't actually support FD_CLOEXEC either.
> So you can consider NaCl to "support" O_CLOEXEC.
> 
> On the Hurd, these are implemented entirely in libc.  So if any part of the
> support is missing, it can be fixed in libc.

What about SOCK_NONBLOCK?  There is fallback code which looks at the
SOCK_CLOEXEC flag, but actually uses SOCK_NONBLOCK.