On 4/10/19 4:33 PM, konsolebox wrote:
> On Wed, Apr 10, 2019 at 11:15 PM Chet Ramey <[email protected]> wrote:
>> If we're going to go off into hypotheticals and speculation, it would be
>> nice if memfd_create were available universally.
>
> I see many parts in lib/* that adapts to available system features
> like mmap and MAP_ANONYMOUS. I don't see why memfd_create should be
> an exception. Using a volatile file is much better than forking, and
> this only requires a one-time implementation of a wrapper library
> function that returns -1 if the feature is not available in the
> system. It should be easy to integrate with the current code since it
> returns an fd.
It has slightly inconvenient semantics, in that you can't open it more
than once, and if you can't do that, you can't convert it from read-write
to readonly.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU [email protected] http://tiswww.cwru.edu/~chet/
