[osol-code] Re: [ksh93-integration-discuss] libfind ready for external tests

[Joerg Schilling]

Glenn Fowler <gsf at research.att.com> wrote:

>
> On Thu, 22 Feb 2007 17:18:12 +0100 Joerg.Schilling at fokus.fraunhofer.de (Joerg Schilling) wrote:
> > Glenn Fowler <gsf at research.att.com> wrote:
> > > 	int b_test(int argc, char *argv[],void *extra)
>
> > Well, I did plan to do something like:
>
> > if ((fp = dlsym(RTLD_DEFAULT, "b_test")) != NULL)
> > 	we have b_test() available.
>
> > The problem is that not all platforms might support RTLD_DEFAULT.
>
> you can get a global handle from dlopen() using a path of 0:

Thank you, I forgot about this...

> you may need to check for "_b_test" if "b_test" fails on some implementations

OK, thank you for this hint too.

But first, I would like to know some basic things:

-	How is the I/O redirection done for ksh93 builtins?

-	How does ksh93 look for shared libs and how does it
	find which builtin commands are inside a shared lib?

-	How does ksh93 e.g. know to load libcmd and now does
	it e.g. know that there is a b_ls() inside?



Jörg

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