Killing a screen without a specific session #

To create a screen, I am currently doing:

screen -dmS screenname ./file

That works perfectly, however killing it remotely with:

screen -X -S screenname exit

Will reply with:

No screen session found

This is due to the screen having {session#}.{screenname}

It will work if done as:

screen -X -S session#.screenname exit

What solutions are possible? I’m not entirely sure that you can get the session# when you start the screen. This is all done remotely too.

Answer

I also start screens with the -dmS option, and I send commands to the screen using the stuff command:

$ screen -dmS screenname
$ screen -ls
There is a screen on:
    22941.screenname        (Detached)
1 Socket in /var/run/screen/S-user.

$ screen -S screenname -p 0 -X stuff "exit$(printf \r)"
$ screen -ls
No Sockets found in /var/run/screen/S-user.

$ 

more details on “stuff” are in the screen man page, search for ‘stuff string’