On Jan 20, 2007, at 2:37 PM, Douglas Allan Tutty wrote:

> On Sat, Jan 20, 2007 at 05:47:36PM +0000, Anton Piatek wrote:
>> Hi,
>> I have a amd64 install of debian with a 32bit chroot for a couple
>> of apps.
>> This works great, but I have a question.
>>
>> Is it possible to have an application inside the 32bit chroot
>> launch an
>> application on my main 64 bit system? (e.g. a photo browsing
>> program in the
>> 32bit chroot launching gimp, which is installed in my main 64 bit
>> system).
>> I currently launch my 32bit programs with schroot and am hoping I
>> can set
>> something to make specific programs outside the chroot available...
>>
>> I cannot think of how this can be achieved, so any ideas are
>> welcomed.
>>
>
> I've never played with chroot but if you add ssh to the chroot
> could you
> ssh the main box from within the chroot? If so, you could set up ssh
> with public-key so no passwords were required and it would be
> transparent.
>
> I wonder.
>
> Doug.

That might work. Here's another way that might be a little less
resource intensive but would require some development effort to
package-up for easy use:

Create a named-pipe (also called "fifo" -- see "man fifo") in the /
tmp directory of the chroot area. This will be available to the 32-
bit processes inside the chroot and also to the 64-bit processes
(because the chroot area is a subset of the main 64-bit file-system
space). Write to it in the 32-bit area and read from it in the 64-
bit area. If you need full-duplex communication, you'll have to have
two pipes (I think.)

I haven't tried it myself, but it should work.

Rick


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