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Does Locking a folder prevent programs from also writing to files / creating files / deleteing files in that folder and its subfolders?

Or is it only locking UI actions?

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Is this a programming question? If so it would be better suited to – Andrew Lambert Feb 18 '12 at 5:13
@Amazed It's not programming related. – Daniel Beck Jul 14 '12 at 12:50
up vote 1 down vote accepted

Locking via the UI does prevent other programs/processes/users from changing the folder's content, in any way.

A simple test you can run to prove it to yourself: open terminal and navigate to a folder. In Finder, click Command+I on that folder and lock it. In terminal, type cat > test. You'd get an error message. Unlock the folder and re-run the command in terminal - it now works.

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