Ezequiel Garc?a [off-list ref] writes:

I find hard that userspace is who opens the device in this particular case,
because I get the "open" call just by plugging in the usb, right after
usb_probe.
(unless there is a daemon, or udev opens the device for module
insertion or something).

Typical V4L rules have something like this in
/lib/udev/rules.d/60-persistent-v4l.rules :

IMPORT{program}="v4l_id $tempnode"


So yes, looks like udev will open your device when it's plugged.


Bj?rn