Return all files under a path

Q: Return all files under a path

This question evaluates filesystem traversal and recursive/iterative algorithm skills, including handling different path types, edge cases such as missing or inaccessible paths, and robustness concerns like symlink cycles when enumerating files.

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Question

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You are building a simple file crawler.

Task

Implement an API/function:

Input: a filesystem path rootPath
Output: a list/array of all file paths contained under rootPath (recursively), in any order.

Assume:

Paths can be directories or files.
You are given a helper function similar to:
- listChildren(path) -> (subdirs, files) where subdirs are immediate child directories and files are immediate child files.

Notes / edge cases to clarify in your solution

If rootPath is a file, return just [rootPath] .
Decide what to do if the path does not exist or is not accessible (e.g., throw an error vs return empty).
Avoid infinite loops if the filesystem can contain symlinks (state your assumption if you ignore symlinks).

Return all files under a path

Quick Overview

Task

Notes / edge cases to clarify in your solution

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