Re: how to create /dev/root

[Harald Hoyer <harald@redhat.com>]

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piterpk wrote:
>> On Sat, Jul 12, 2008 at 04:52, Marco d'Itri <md@linux.it> 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
>>> }
> 
> Based in original Marco´s code, we are using this one:
> 
>           # Create rootdev rules
>           DEVICENUMBER=$( /bin/stat -c %d / )
>           MAJORNUMBER=$(($DEVICENUMBER / 256))
>           MINORNUMBER=$(($DEVICENUMBER % 256))
> 
>           echo 'ACTION=="add", SUBSYSTEM=="block", ENV{MAJOR}=="'$MAJORNUMBER'", ENV{MINOR}=="'$MINORNUMBER'",
> SYMLINK+="root"' > /dev/.udev/rules.d/61-dev-root-link.rules
> 
> But our uses stat instead mountpoint (mountpoint is in /usr/bin and stat is in /bin)

Fedora:

$ which stat
/usr/bin/stat



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