On Sat, Jul 12, 2008 at 04:52, Marco d'Itri <md@xxxxxxxx> wrote:
> I added this to the Debian udev init script, run between mounting /dev
> and starting udevtrigger.
>
> mountpoint at least on Debian systems is part of sysvinit and happens to
> be in /bin, but if /usr is available then you can as well use stat(1).
>
> create_devroot_rule() {
> local udevroot="$1"
> local rootnumbers=$(mountpoint -q -d / || true)
> local rootmajor=${rootnumbers%:*}
> local rootminor=${rootnumbers#*:}
> [ "$rootmajor" -a "$rootminor" ] || return 0
>
> echo 'ACTION=="add", SUBSYSTEM=="block", ENV{MAJOR}=="'$rootmajor'", ENV{MINOR}=="'$rootminor'", SYMLINK+="root"' > /dev/.udev/rules.d/rules.d/61-dev-root-link.rules
> }
Looks fine, didn't know about "mountpoint, and not sure if all distros
have it. We use:
udevadm info --device-id-of-file=/
since a while. I've added --export to it now, so:
eval $(/sbin/udevadm info --export --export-prefix=ROOT_
--device-id-of-file=/)
should make $ROOT_MAJOR, $ROOT_MINOR available without any further
shell mangling.
Kay
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