On Wed, Jan 3 2024 at 11:14:59 -08:00:00, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
It's some annoying SSL VPN thing that splices to pppd: https://lore.kernel.org/all/C8KER7U60WXE.25UFD8RE6QZQK@oguc/
I'm happy to report that that particular SSL VPN tool is no longer around. And it had anyway grown a fall-back-to-read/write in case splice() fails. So at least from my perspective, no objections to splice-to-tty going away
altogether.
and I'd be happy to try to limit splice to tty's to maybe just the one case that pppd uses.
To be exact, pppd is just providing a pty with which other (now all extinct?)
applications can do nefarious things.
Maybe that VPN thing already has the pty in non-blocking mode, for example, and we could make the tty splicing fail for any blocking op?
FWIW, the SSL VPN tool did indeed have the pty in non-blocking mode. Oliver
