Issue when syncing files starting with an underscore to smb network drives (and potentially elsewhere)

[neuronflow]

I am running rsync 3.2.7 on OSX 13.4 (also tested an older version 2.x and encountered the same problem).

It seems that rsync during the copy process generates a file named: .filename.seemingly_random_string

When copying to smb network drives I run into permission issues when I try to rsync files that begin with an underscore.

The resulting temporary files are then called: ._file_name.seemingly_random_string // notice the leading dot

However, smb servers often prohibit naming files ._* and consequently produce permission errors.

For the moment I am trying to remedy this with the --inplace parameter that seems to come with its own caveats.

My naive proposal would be to instead name the temporary files: file_name.random_string.rsync which should be allowed on all systems?

Side observation: naming any file ._file-name lets the files disappear in the OSX finder, even when it is configured to show hidden files.

Thanks for your help!