russh client: Where does the output go when the server directly executes a command?

[gerion0]

Hi, I have a setup where on the server side (OpenSSH), I have a special user account that has a login shell that does not actually start an (interactive) shell but a program that directly outputs a string to stdout (like every hello world program or echo "hello world" on the shell).

This results in the following behaviour when connecting via ssh:

$ ssh my-special-user@example.com
Some output
Connection to example.com closed.

On the client side, I want to use russh to connect to this account and capture its output (Some output). However, I haven't found out how to get the string.
My program is able to connect to the server and authenticate via publickey (Handle::authenticate_publickey). After that, I tried:

1. create a channel with channel_open_session and print its output. Nothing comes.
2. Implement the callbacks: server_channel_open_session, server_channel_open_unknown, data, channel_close, auth_banner, check_server_key. check_server_key is called but none of the other functions.

Do you know, how I can capture the string?

[Eugeny]

Both approaches should work, post your code pls

Also, just running OpenSSH from the terminal like that makes a PTY request, depending on your "shell" program, you might need to do a request_pty on your channel

[gerion0]

request_shell() did the trick, thanks for the hint!