From: "Serge E. Hallyn" <serge.hallyn-GeWIH/nMZzLQT0dZR+AlfA@public.gmane.org>
To: James Bottomley
<James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
Cc: linux-fsdevel
<linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org>,
Al Viro <viro-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
Subject: Re: [Patch resend v3 3/3] binfmt_misc: add F option description to documentation
Date: Tue, 19 Apr 2016 14:58:32 -0500 [thread overview]
Message-ID: <20160419195832.GA32382@mail.hallyn.com> (raw)
In-Reply-To: <1461068980.2435.6.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
Quoting James Bottomley (James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org):
> Signed-off-by: James Bottomley <James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
Acked-by: Serge Hallyn <serge.hallyn-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
Thanks, James. Which tree were you thinking this would go in
through?
> ---
> Documentation/binfmt_misc.txt | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/Documentation/binfmt_misc.txt b/Documentation/binfmt_misc.txt
> index 6b1de70..ec83bbc 100644
> --- a/Documentation/binfmt_misc.txt
> +++ b/Documentation/binfmt_misc.txt
> @@ -66,6 +66,13 @@ Here is what the fields mean:
> This feature should be used with care as the interpreter
> will run with root permissions when a setuid binary owned by root
> is run with binfmt_misc.
> + 'F' - fix binary. The usual behaviour of binfmt_misc is to spawn the
> + binary lazily when the misc format file is invoked. However,
> + this doesn't work very well in the face of mount namespaces and
> + changeroots, so the F mode opens the binary as soon as the
> + emulation is installed and uses the opened image to spawn the
> + emulator, meaning it is always available once installed,
> + regardless of how the environment changes.
>
>
> There are some restrictions:
> --
> 2.6.6
>
> _______________________________________________
> Containers mailing list
> Containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
> https://lists.linuxfoundation.org/mailman/listinfo/containers
next prev parent reply other threads:[~2016-04-19 19:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-19 12:24 [Patch resend v3 0/3] allow the creation of architecture emulation containers where the emulator binary is outside the container James Bottomley
[not found] ` <1461068670.2435.0.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2016-04-19 12:27 ` [Patch resend v3 1/3] fs: add filp_clone_open API James Bottomley
2016-04-19 12:28 ` [Patch resend v3 2/3] binfmt_misc: add persistent opened binary handler for containers James Bottomley
2016-04-19 12:29 ` [Patch resend v3 3/3] binfmt_misc: add F option description to documentation James Bottomley
[not found] ` <1461068980.2435.6.camel@HansenPartnership.com>
[not found] ` <1461068980.2435.6.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2016-04-19 19:58 ` Serge E. Hallyn [this message]
[not found] ` <20160419195832.GA32382-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2016-04-19 20:01 ` James Bottomley
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