Message to the user

[khromenokroman]

Message to the user

[olofhagsand]

With "the plugin" I assume you mean a backend plugin.
A cli plugin can just use stderr/stdout.
Communication from a backend plugin ro the cli (or any other client) is by:

1. Replies on existing RPC:s when the function is completed. One could define a new RPC just to poll a message
2. Notifications. Set up a event notification which the CLI (or any other client) can subscribe to.
3. Some out-of-band mechanism, but this is outside clixon.

For event notifications:
The backend plugin creates a stream with stream_add() and then makes notifications with stream_notify().
The cli client (cli plugin) subscribes to the event stream with clicon_rpc_create_subscription() and then needs to set up event handling for the returned socket.

[olofhagsand]

See also https://clixon-docs.readthedocs.io/en/latest/misc.html#event-notifications