Re: Changing name format for backup files

[Óscar Fuentes]

Nick Helm <nick@tenpoint.co.nz> writes:

> I do something similar to `make-auto-save-file-name' to achieve the
> same result for auto save files.
>
> Redefining core functions seems like a pretty heavy handed approach to the
> problem though. Is there better way to achieve the same result? Or perhaps
> there's a user option I missed in the manual?

For overriding how a function work, see defadvice.

However, often there are variables that control how some feature works.
For your case, those seems to apply:

C-h v make-backup-file-name-function
C-h v auto-save-file-name-transforms