Fast file scan

[Guy Harris]

>>I would probably use ftw(3).  I've found it a useful tool.  
>
>I believe find uses ftw.

Unless you're talking about S5R4 or 4.4BSD or maybe 4.3-Reno, you
believe incorrectly; while the "find" in those releases may be built
atop "ftw" (or atop an enhanced version of same), in most UNIXes out
there "find" doesn't use "ftw".

What *is* the case is that the code of "ftw" is basically the guts of
"find" ripped out and converted into a subroutine, but that's a
different matter.