> 
> Moot example since getpw*() use nsswitch anyway, but I think I see
> what you're driving at.

Not moot at all!
nsswitch is typical of the pieces of code that would like to be
able to dlopen() the library that does the real work.

(But please, please don't put code into libraries that are likely
to be dlopen()ed that write result codes to global data items.
It can be impossible to find the correct copy of the global variable.)

	David

-- 
David Laight: david@l8s.co.uk