"-f ._filterlist" syntax

Sun Sep 27 22:19:17 UTC 2020

Hello, A GUI program uses rsync for network transfers. It is able to
load  filters from a file by putting a dot and underscore before it.
Example:mkdir 1 2; touch 1/a .empty; rsync -f ._empty 1/ 2/

Is the dot underscore specific to rsync or is it a general bash (or
similar?) feature to load arguments from a file? And is it documented
anywhere for rsync?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.samba.org/pipermail/rsync/attachments/20200927/38d010f9/attachment.htm>