On Tue, 6 Apr 2010, Markus Rechberger wrote: [...] > > how about security permissions? while you can easily change the > permission levels for nodes in /dev you can't do this so easily with > sysfs entries. > I don't really think this is needed at all some applications will > start to use ioctl some other apps might > go for sysfs.. this makes the API a little bit whacko This is an excellent point. I should have brought this up sooner. The driver has control over the modes of the nodes in sysfs. The driver does NOT have control over the owner / group of those nodes. It is possible to change the owner / group from userspace, and I *think* it's possible to create a udev rule to do this, but honestly I have not investigated this possibility so I don't fully know. This is one serious potential drawback to using sysfs as a driver API. -Mike -- Mike Isely isely @ isely (dot) net PGP: 03 54 43 4D 75 E5 CC 92 71 16 01 E2 B5 F5 C1 E8 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
