[Fab-user] open_shell as root?

[Mohamed Lrhazi]

How would you call fabric.operations.open_shell(command=None)
And have it run sudo su - automatically so you get a root shell ?

I tried something like command="sudo su -", which works, but I am
prompted for the password, can that propmt be handled by fabric?
I tried: something like command="sudo -p '%s' su -"%env.sudo_promopt
but that did not seem to help.

Thanks a lot.
Mohamed.