devfs and /dev on liveCD boot

[im_if]

On a "Live CD" boot (like a Mac x ESD install image), how does /dev work? I would guess, /dev is actually located (mounted devfs?) in RAM. "Auto-magically" would be another guess...
cheers

P.S.

df /dev |awk '{print $1,$NF}'
Filesystem on
devfs        /dev

 

[wblock@]

devfs(5) is dynamic (memory-based), it's like that whether on a live CD or a running system.

 

[SirDice]

Yep, it just appears like a filesystem, it doesn't 'physically' exist on the disk. If you unmount devfs(5) you'll see that /dev/ is just an empty directory.