From: Serge Hallyn <serge.hallyn-GeWIH/nMZzLQT0dZR+AlfA@public.gmane.org>
To: Rob van der Hoeven <robvanderhoeven-nv30jWqA7Mk@public.gmane.org>
Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Subject: Re: Pass a fd to program in another mount namespace?
Date: Tue, 21 Jan 2014 17:07:08 -0600 [thread overview]
Message-ID: <20140121230708.GA2342@ac100> (raw)
In-Reply-To: <1390314790.19789.79.camel-fUTaybRSAecurNyw8EiOWGKXln2oN1SQ@public.gmane.org>
Quoting Rob van der Hoeven (robvanderhoeven-nv30jWqA7Mk@public.gmane.org):
> 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
next prev parent reply other threads:[~2014-01-21 23:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-21 14:33 Pass a fd to program in another mount namespace? Rob van der Hoeven
[not found] ` <1390314790.19789.79.camel-fUTaybRSAecurNyw8EiOWGKXln2oN1SQ@public.gmane.org>
2014-01-21 23:07 ` Serge Hallyn [this message]
2014-01-22 13:40 ` Rob van der Hoeven
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