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I want to do something like this:

#!/bin/bash screen -r session -X run 'long-cleanup-and-quit' doing-something-else ...

Which is fine, but I want 'doing-something-else' to wait for screen. screen -X doesn't block, which is understandable.

So is there a way to have screen -r session -X run 'long-cleanup-and-quit' attach, run command, but do NOT detach? Eventually the command will terminate the process/screen so the script can continue.

My workaround so far is to just loop for the process and wait.

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I found a great solution by incorporating an answer to a non-screen question here:

https://stackoverflow.com/a/36152028/188963

and here:

https://stackoverflow.com/a/18756584/188963

So, you can do:

(base) balter@spectre:~$ cat file123 cat: file123: No such file or directory (base) balter@spectre:~$ screen -dmS test bash -c "echo 123 > file123; bash" (base) balter@spectre:~$ cat file123 123 (base) balter@spectre:~$ screen -ls There is a screen on: 13496.test (05/19/22 12:04:13) (Detached) 1 Socket in /home/balter/.screen.

or

screen -dmS test bash -c "top; bash"

When I attach screen -r test top is running. When I q to kill top, I drop into a bash shell.

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