How to see all the parents of a device in reverse order

[sbix]

Hi everybody,
I am not sure if I have seen something like in the subjet here or in another forum.
I am looking for a script or something capable to walk the device list in reverse order from the child device up to "sys0".
I do know it is possible... I did something some time ago... but.. often I can hardly remember even my name... B-(

 

[MoreFeo]

Perhaps a script like this:

#!/bin/ksh
dev=$1
echo $dev
while ! expr "$dev" : "sys0"
do
 dev=$(lsdev -Cl $dev -F parent)
 echo $dev
done

And call this script passing the device as parameter.

I haven't tried it, but it should work (be careful with non existent devices).

 

[khalidaaa]

I use this in my DLPAR script to find the parent:

while [[ $DEV != pci* ]]; do
  SLOT=$(lscfg -l $DEV | awk '{print $2}')
  DEV=$(lsdev -C -F parent -l $DEV)
done
/usr/sbin/rmdev -R -l $DEV

Regards,
Khalid

 

[MoreFeo]

Mixed Khalidaaa's one with mine, and checking for undefined devices:

#!/bin/ksh
dev=$1
echo $dev
devstat=$(lsdev -C -F status -l ${dev} 2>/dev/null)
if [[ $devstat != Available && $devstat != Defined ]]
then
 echo "$dev undefined"
else
 while [[ $dev != sys0 ]]
 do
  dev=$(lsdev -Cl $dev -F parent)
  echo $dev
 done
fi

 

[sbix]

Thanks everybody.
Khalida... the final rmdev would be a little dangerous in a sort of QUERY command....
But the main idea is correct.

 

[p5wizard]

Well, for a DLPAR environment (as Khalidaaa stated), it is quite normal to logically remove devices (e.g. a tape or optical drive) and their ancestors (hence [tt]rmdev -R -l <top_parent_device>[/tt]) in order to move the physical device to another LogicalPARtition.
Nothing dangerous about that, the devices are only set to "Defined" instead of "Available", so that they can be unpresented to the current LPAR, presented to another and discovered there...


HTH,

p5wizard