ifdefs: O_NONBLOCK O_NOCTTY TIOCMGET

[Matthew Selsky]

On Sat, Nov 04, 2017 at 10:22:25PM -0700, Hal Murray via devel wrote:
> 
> While looking at some code, I noticed several symbols that are sometimes 
> protected with an ifdef and sometimes assumed to exist.
> 
> I think they are all required by POSIX, and thus the ifdefs are not needed.
> 
> Is there any simple way to verify that a symbol is required by POSIX, and/or 
> the parts of POSIX we require?
> 
> Any reason I don't get rid of the ifdefs?

Hey Hal,

I see O_NONBLOCK and O_NOCTTY referenced on http://pubs.opengroup.org/onlinepubs/9699919799/functions/open.html

I haven't yet found TIOCMGET mentioned in the POSIX spec.


Cheers,
-Matt