On Sun, Nov 29, 2009 at 20:08, Matthias Schwarzott <zzam@xxxxxxxxxx> wrote: > Newer udev has an ugly behaviour regarding block devices. > Chown a blockdevice to some user and open it once. > udev will trigger a change event and reset the permissions back to root:disk. > > The fastest solution I can propose is to restrict permission setting to > ACTION=="add", but is that a good choice? > > The use-case I had was to allow a user to access /dev/sda for running qemu. I guess, such users should create a simple rule in /etc/udev/rules.d/ with the intended settings to apply the permissions. There are many reasons for change events, and they can happen for any device at any time, and we re-apply all settings with a change event, because the device might have changed its settings, and needs a new policy applied. As a simple workaround ACLs can probably be used, and they should not be removed with any later event, unless the primary ownership/mode is not touched. Kay -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
