Consider a WriteConflict exception, or something like it

[willmcgugan]

See #18

[rkhwaja]

OneDriveFS could use this. I haven't implemented a handler for it yet, but from the documentation, it would happen if another file with the same path was created while OneDriveFS was in the middle of a upload session.
It looks like it can't happen with directories.

[dargueta]

Has no one gotten around to this yet? DropboxFS could use it too.

[willmcgugan]

It's probably going to be a "won't fix" I'm afraid. Detecting and reporting information about the conflict is inefficient, and impractical on some filesystems.