telldir dirhandle
Returns the current position of the readdir
routines on
a directory handle (dirhandle).
This value may be given to seekdir
to access
a particular location in a directory. The function has the same caveats about
possible directory compaction as the corresponding system library routine. This
function may not be implemented everywhere that readdir
is.
Even if it is, no calculation may be done with
the return value. It's just an opaque value, meaningful only to seekdir
.