Variable: backup-by-copying-when-linked
backup-by-copying-when-linked is a customizable variable defined in
files.el.gz.
Value
nil
Documentation
Non-nil means use copying to create backups for files with multiple names.
This causes the alternate names to refer to the latest version as edited.
This variable is relevant only if backup-by-copying is nil.
Source Code
;; Defined in /usr/src/emacs/lisp/files.el.gz
(defcustom backup-by-copying-when-linked nil
"Non-nil means use copying to create backups for files with multiple names.
This causes the alternate names to refer to the latest version as edited.
This variable is relevant only if `backup-by-copying' is nil."
:type 'boolean
:group 'backup)