[Question] Could client and server communicate on pipes (stdin/stdout) instead of sockets?

[leo9800]

The scenario was a daemon (run as root) is handling inbound WebDAV requests and authenticate users with PAM, upon successful authentications, the filesystem-related functions/syscalls should be invoke as the user authed by PAM, not root.

I am trying to implement an RPC server as filesystem helper, which features filesystem related 'procedures' like open, close, read, write, mkdir, etc, and the main daemon act as RPC client.

On successful user login, the daemon (RPC client) spawn a filesystem helper (RPC server) with subprocess.Popen(), and the filesystem helper invokes os.setuid() & os.setgid() immediately after spawn, to invoke those function as the authenticated user.

The issue is, if RPyC is my RPC implementation, is it possible to operate it on PIPE (i.e. standard input/output, stdin/stdout) instead of TCP socket?

Thanks