RFR: 8237830: support O_CLOEXEC in os::open on other OS than Linux

[Baesken, Matthias]

Hi David, thanks for the review .

I'll follow your " One nit:"  advice �� !

Best Regards, Matthias

> 
> On 12/02/2020 6:31 pm, Baesken, Matthias wrote:
> > New webrev  :
> >
> > http://cr.openjdk.java.net/~mbaesken/webrevs/8237830.3/
> >
> >     * this time ,  only touching  os_aix.cpp  ( I leave os_bsd.cpp as it
> > is , might
> >
> >       make the discussion   more  simple )
> >
> >     * Added handling of  failing O_CLOEXEC   (
> O_CLOEXEC_is_known_to_work
> >
> >       == -1  … case )
> 
> Seems okay.
> 
> One nit:
> 
> !   int oflag_with_o_cloexec = oflag;
> !   oflag_with_o_cloexec |= O_CLOEXEC;
> 
> could just be:
> 
> !   int oflag_with_o_cloexec = oflag | O_CLOEXEC;
> 
> Thanks,
> David
>