Re: [Q] claimed block devices

[christophe . varoqui]

Selon Dave Kleikamp <shaggy@xxxxxxxxxxxxxx>:

> On Thu, 2004-07-22 at 04:51, christophe.varoqui@xxxxxxx wrote:
> > Hello,
> >
> > does somebody know how a userspace C-proggy can detect if a block device is
> > claimed  ? Creating a device map over such devices will fail, so better not
> to
> > try.
>
> I believe trying to open the device with O_EXCL will fail if the device
> is claimed.
>
> Shaggy
> --

if I read fs/block_dev.c correctly, O_EXCL will always fail on block device.
I would also like to use the lock owner information ... which seems even more
tricky.

regards,
cvaroqui
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