Re: "Deep recursion" error

[sundialsvc4]

Even if you don’t choose to use a File::Find type module, you certainly can use their core techniques ... which don’t involve recursion.   Instead, they use a simple push-down stack.

You start by pushing the starting location on the stack.   Then, something like this:

while (the stack is not empty) {
  pop a name off the stack
  search that directory for entries:
    -- if it is "." or ".." then SKIP it.  (Guess this is what you're 
+not doing.)
    -- if it is a directory, "push" or "unshift" the fully-qualified n
+ame onto the stack.
    -- if it is a file, process it, or stack it on another queue it to
+ be processed soon.
}

If you push the names, you get a “depth-first” search; if you unshift them, “breadth-first.”

This also circumvents another file-system bugaboo, especially noticeable in Windows:   the number of active “searches” that you can actually have going at one time, and the problem of interference between them.   Only one search is actually going-on at one time.