[Patch resend v3 3/3] binfmt_misc: add F option description to documentation
Serge E. Hallyn
serge.hallyn at ubuntu.com
Tue Apr 19 19:58:32 UTC 2016
Quoting James Bottomley (James.Bottomley at HansenPartnership.com):
> Signed-off-by: James Bottomley <James.Bottomley at HansenPartnership.com>
Acked-by: Serge Hallyn <serge.hallyn at canonical.com>
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
>
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