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Cygwin uses a little-known aspect of the NT security model. Besides permissions, there are also privileges. And administrators have the backup/restore privilege enabled by default, which means that they can bypass ACLs (access control lists). [1]I'd like to test a script by giving it an unreadable file as an argument.
I usually log in as a user, but one that's in the Administrators group. I made the file (a text file containing just "hello") owned by user Administrator with absolutely no permissions for anyone else.
-- Sylvain RICHARD
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