All these functions do blocking IO, and don't yield back to the
executor, so we cannot invoke them directly, but have to use
spawn_blocking and a channel.
Instead of plainly reverting cl/30575, this keeps potential errors being
sent as the last element of the stream.
We need to make our error construction a bit more ergonomic, potentially
allow them to wrap other errors instead of the madness this currently
is, but this is something for a later CL.
Change-Id: Ifb05871741813a389ac00b4f2c468f984a689a18
Reviewed-on: https://cl.snix.dev/c/snix/+/30586
Reviewed-by: Vova Kryachko <v.kryachko@gmail.com>
Tested-by: besadii
51fc9948cf