On Tue, 2014-01-21 at 17:07 -0600, Serge Hallyn wrote:
> Quoting Rob van der Hoeven (robvanderhoeven@xxxxxxxx):
> > Hi,
> >
> > I was wondering if it is possible to send a file descriptor to a program
> > running in another mount namespace. Sendmsg/recvmsg can pass fd's in the
> > ancillary data and this works great until my program switches to another
> > mount namespace using:
> >
> > unshare(CLONE_NEWNS)
> > pivot_root(".", "./us_rootfs")
> >
> > If there is a way to pass descriptors across mount namespaces then it
> > would greatly benefit my program so I hope this is possible.
>
> Yes, it is possible. Your email makes it sound like you've tried
> and it didn't work for you, in which case a short test case showing
> what fails might be useful here.
>
> -serge
Hi Serge,
Problem solved. It turned out that I had not properly initialized the
ancillary header. Because the problem only showed itself after switching
to another mount namespace I wrongly assumed that this had something to
do with the error. Very happy that this works now.
Your answer made me investigate this further, thanks!
Rob van der Hoeven.
http://freedomboxblog.nl
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