Changing permissions on raw1394
Andrew Hunter a écrit :
> Hey everyone!
> If you have not heard about it already, the Ubuntu Studio team is
> looking at creating an app that would easily allow users to change
> common settings that they may be currently editing by hand.
> One of the features that we are considering is changing the permissions
> on raw1394 /etc/udev/rules.d/40-permissions.rules from disk to audio or
> video. This is a necessary change currently to enable firewire based
> devices to work as a regular user, such as firewire sound cards and
> video cameras.
> The other alternative solution is to add the user to group "disk",
> though this may also cause problems.
> The issue with this is that it creates a rather large security risk for
> the system, in that any device on the firewire bus can run with root
> privileges. This risk is less of an issue for stand-alone machines that
> do not use Ethernet over firewire, but is still something to consider.
> I would like to stress that it _will not_ be changed by default. All
> that we are considering is providing a more accessible way to modify
> those settings.
> In the future, when Ubuntu and by extension Ubuntu Studio move to the
> new firewire stack in the kernel, this issue will be an non-issue. The
> new kernel stack provides much finer granularity and control over
> permissions on specific devices.
> The question then I am posing to you guys is this: How many of you
> already change this setting by hand?
Laurent from France, on my 2 computers, i'd done it each time by hand
with a 1394 pcmcia card Pinnacle + video camera Canon MV10 or standard
pci/1394 and the same video camera.
Many friends have to do the same by hand
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