Re: [PATCH] binfmt_misc: allow selecting the interpreter based on xattr keywords

[Alex BennÃe]

Carlos O'Donell <carlos@xxxxxxxxxx> writes:

> On 08/26/2016 10:55 AM, Florian Weimer wrote:
>> On 08/25/2016 06:15 PM, James Bottomley wrote:
>>> On Sun, 2016-08-21 at 21:01 -0700, Josh Max wrote:
<snip>
>
> This ignores the fact that the alternate loader also needs to have
> it's own ldconfig cache, implementation-dependent lookup paths etc,
> all of which have to be keyed off the xattr keyword specified dynamic
> loader. All of that is tractable though and can be done in userspace
> keyed from the selected dynamic loader. Buy why? Why not use a mount
> namespace and different loader e.g. lxc, docker, etc, or specify a
> loader that is a wrapper and does this for you?

Is binfmt_misc actually containerise-able yet? At the moment when using
qemu-user inside a docker container I still have to ensure the root
binfmt_misc points to the same location as I place qemu-user in the
docker container.

>
> I'm not convinced this is a good idea, but I'm open to learning about
> more use cases.


--
Alex BennÃe