"Not that I would advise doing this.
(sirius)~: zsh -c 'print hello; zsh -i'
hello
(sirius)~: echo $SHLVL
2
There are other tricks you can play with screen and using the $STY variable.
If you want something run from zsh with individual screens, you can check the $STY variable within your .zshrc or .zlogin. It is in the format <PID>.<TTY>.<HOSTNAME>.
if [[ -n $STY ]] then
if [[ -f ~/.zsh-$STY[(ws:.:)2] ]] then
. ~/.zsh-$STY[(ws:.:)2]
fi
fi
If in screen, and if ~/.zsh-<TTY> (from the $STY variable) exists, source that, then continue on your merry way. You can also set an environment variable before calling the interactive shell.
> FOO=bar zsh -i
> env | grep FOO
FOO=bar
> RUNTHISCOMMAND=/path/to/script zsh -i
.zshrc:
if [[ -n $RUNTHISCOMMAND ]] then
$RUNTHISCOMMAND
fi
Add those checks into your .zshrc/.zlogin."
