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xen-devel
Re: [Xen-devel] Easy user-space usage of xenstore
On Fri, Jun 30, 2006 at 10:34:45AM -0400, Rian Hunter wrote:
>
> On Jun 30, 2006, at 8:29 AM, Vincent Hanquez wrote:
> >you can access /local/domain/<self>/.. by just using relative path
> >instead
> >of absolute path.
> >
> >ex: if you want to read /local/domain/5/something/x from domain 5
> >you can
> >just do :
> >
> >value = xs_read("something/x");
>
> Oh can I? That's what I thought except when I do:
>
> $ xenstore-read something
>
> it fails. Maybe that's because xenstore-read always does an absolute
> path. I've read the source and it doesn't seem that way, I'll guess
> I'll try writing a program that uses the xs library to be sure.
It probably fails because of permissions -- you can only read what the tools
in domain 0 have explicitly allowed you to read.
I've just added some notes to the XenBus page on the wiki wrt permissions --
they are worth reading.
Ewan.
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