On Thu, 7 Jun 2007 11:06:23 +0100
Alan Cox <[email protected]> wrote:
> > I don't think it's a matter of versioning. Many userspace libraries
> > expects their fds to be compact (for many reasons - they use select, they
> > use them to index 0-based arrays, etc...), and if the kernel suddendly
> > starts returning values in the 1<<28 up arena, they sure won't be happy.
> > So I believe that the correct way is that the caller specifically selects
> > the feature, leaving the legacy fd allocation as default.
>
> I don't understand the connection between this paragraph (with which I
> agree) and the urge to add a ton of ugly syscall hacks. "Caller
> specifically selects feature" - > prctl(). Libraries get unhappy ->
> linker issue.
>
Alan, prctl() things are usually inherited at fork()/exec() time.
If you fork() from a new application , then exec an old one
(eventually a statically linked program), we have a problem ?
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