Syntax for completely launching and disowning a process

Created by: japm48

Feature request

I would like to see something similar to &! in zsh (documentation).

This allows launching e.g. firefox &! and keep it running even after the shell (and the terminal window) is closed.

In addition, I would like to see something like &!! (not implemented in ZSH or any other shell I know of) which also detaches stdin and stdout from the spawned process, as some GUI programs can be noisy. This would be a lot cleaner than having to manually redirecting to /dev/null.