$ cd /foo/bar ; ln -s . snaretrap
Now watch that code run forever.
Check for symlinks before you recurse. Of course, if several files are hardlinked to each other below /foo/bar/, they will be counted multiple times, which may or may not be desired - likely not. stat files and check if you've seen that combination of device and inode number before. Etc etc etc..
It's only an innocent
looking problem.
Makeshifts last the longest.
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