Re: [RFC] patch's default backup behavior

From: Warner Losh <>
Date: Sat, 09 Apr 2022 03:41:44 UTC
On Fri, Apr 8, 2022, 9:26 PM Kyle Evans <> wrote:

> Hello!
> FreeBSD's patch follows historical patch(1) behavior w.r.t. backups,
> where a backup is created for every file patched.
> I'd like to test the waters on switching this to the GNU behavior,
> which feels a whole lot more reasonable. Notably, they'll only create
> backup files if a mismatch was detected (presumably this means either
> a hunk needed fuzz or a hunk outright failed). This yields far fewer
> backup files in the ideal scenario (context entirely matches), while
> still leaving backup files when it's sensible (base file changed and
> we might want to regenerate the patch).
> Thoughts / comments / concerns? Cross-posted this to a couple of
> different lists to try and hit the largest number of stakeholders in
> patch(1) behavior.

Could one select the old behavior? Or would it just be a change? A new -V

I like the Idea.


> Kyle Evans