AJ Heller

@chamikaramj I believe you're running into a deadlock with Popen using `stdout=subprocess.PIPE`. I confirmed that the gRPC fork handlers aren't running at all when your example hangs, which means this...

> How can I add support for bazel? One potential solution would be to add a config variable that can be toggled with something like `bazel build --define=use_systemd=true`, and introducing...

@abeltranmsft Thanks for this. It seems like this is going to be difficult to wire into our CI environment, IIUC an end2end test would require modifying the system's own systemd...

> the API to get the FD from libsystemd is trivial and exercised in the same way across a gazillion projects That's great. And I understand there is some unit...

@bluca thanks, we restrict CI runs to team members only, intentionally. Letting anyone (new or established Github users) run the CI could easily exhaust our resources, so we keep it...

I've continued this work in #31035

> About removing the handling from the subchannel code, I have seen code in prod use this test arg unfortunately. I can't think of a better reason to remove it....

In the basics tutorial, https://grpc.io/docs/languages/cpp/basics/, the RouteGuide's `RouteChat` service is a bidirectional streaming RPC. There's an asynchronous callback-based server implementation in https://github.com/grpc/grpc/blob/e026f5759c3f589745b50c0577a1b50f62f558a3/examples/cpp/route_guide/route_guide_callback_server.cc. Hope this helps!

That sounds like a bug in the platform's `netinet/tcp.h` implementation. If it requires `sys/types.h`, it should probably include it. I found a [few](http://fxr.watson.org/fxr/source/netinet/tcp.h) [implementations](https://sites.uclouvain.be/SystInfo/usr/include/netinet/tcp.h.html) that do so.

> making a header reordering tweak is not advisable. I have no objection to getting gRPC working on the platform, the PR looks fine. I'm just calling out the deficiency...