disabling local-to-local transfers?

[Brian Candler]

On 25/07/2026 02:05, Damien Miller wrote:
> 	for av in "$@" ; do
> 		if test -z "$_flagsdone" ; then
> 			case "$av" in
> 			-*) continue ;;
> 			*) _flagsdone=1 ;;
> 			esac
> 		fi
> 		case "$av" in
> 		*:*) _remote=1 ;;
> 		esac
> 	done

That's a rough heuristic. I think that properly parsing scp arguments is 
hard, e.g.

     scp -J 2001:db8::1 foo bar

A fully-functional wrapper would likely have to duplicate the entire 
argument parsing code from scp.

FWIW: I've had a few cases over the years of accidentally creating local 
file copies, and I've never *intentionally* used scp for local copying. 
If the proposed feature were available, I'd certainly turn it on in my 
own ~/.ssh/config. But it hasn't caused me sufficient pain to warrant 
pushing the point any further. It's clear that key developers of OpenSSH 
are fundamentally opposed, and I respect that.