How to attach to existing screen session or create a new one and run a command?

Question

I'm using

screen -RdS SessionName

To attach to existing session if exist or create a new session and attach to it. I also have

screen -RdS SessionName -X stuff 'ls -l'`echo -ne '\015'`

To run a command in a screen session. However, I expect to be inside the screen session after this command. What is the command which does what the first does but also runs some command inside screen?

Answer 1

For now the following solution completely satisfies me

screen -S SessionName -X stuff 'ls -l'`echo -ne '\015'`; screen -RdS SessionName