GNU Screen: send "stuff" command to detached screen session?

metaf5 · 01-14-2012, 08:20 PM

When I try to "stuff" text into a detached screen session using the command:

screen -XS $sessionName stuff "$text `echo -ne '\015'`"

It doesn't seem to do anything. But, if I first attach to the screen, do nothing, then detach it, and run the command again, it seems to work reliably. Does anyone know why this is?

hololeap · 01-14-2012, 09:07 PM

No idea. I played around with it and I couldn't figure out how to get the paste or stuff commands to work on a session started with "screen -d -m". I'm guessing there's some kind of flag that gets set when you first make user interaction that activates the input buffer. I would try something else, or ask the GNU screen developers.

geomaster · 01-20-2012, 01:56 AM

Workaroud

$ screen -dmS spawner sleep 30
$ screen -S spawner -X screen screen -dR mydaemon
$ sleep 1
$ screen -S mydaemon -X detach
$ screen -S mydaemon -X stuff "whatever"

It's work for me, but need some small changes for my scripts - send 'exit\015' to spawned screen

metaf5 · 01-23-2012, 08:44 PM

This works excellently. I'll test it soon and see if things get odd when I start running multiple instances of the script that starts other screens(and in the process, spawners). Thanks a lot!