Sharing without change permission should not show a rename button
Testing web UI of 10.2.1RC3
User admin shares folder AdminPhotos with user jwtest with share, create, delete permissions, but without change permission:

User jwtest does not see a rename button on files within AdminPhotos (no change permisision, ok). But user jwtest has a rename button on subfolders within AdminPhotos.

Actually trying a rename results in an error then. This is inconsistent. Either always have the rename button and show errors, or never have the rename button.
I guess jwtest also has read permission.
Actually read+create+delete=>change in a logical sense.
If I have read+create+delete and I want to:
- change the name of a file, then download the file, delete the file on the server, rename the file locally, upload (create) the file on the server
- change the content of an existing file, then delete the file on the server and upload a local file with different content
So IMO even being able to specify just read+create+delete without change is "odd"
Yes, there seems to be an implicit read permission. The UI does not expose that to me, that is why I did not mention that.
I agree that (read+)delete+create should imply change for consistency with available workarounds. Although the workaround of delete+recreate has sideeffects, that an inplace change would not have: UUID changes, shares get dropped, ...
Yes, the webUI always gives read priv. It has no UI for removing that.
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