`fs.getAttributeView(...)` is supposed to return `null` if the view is not supported

cryptomator / cryptofs

Java Filesystem Provider with integrated encryption

GNU Affero General Public License v3.0

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`fs.getAttributeView(...)` is supposed to return `null` if the view is not supported #131

Closed overheadhunter closed 2 years ago

overheadhunter commented 2 years ago

API such as Files.setPosixFilePermissions(...) relies on getAttributeView(...) to return null in case of the requested view not being supported. However, CryptoFS does always return a view, even though it should not. This leads to later NPEs when an attempt is made to use this view but the corresponding view on the ciphertext node is unavailable.

See cryptomator/cryptomator#2238