[PATCH] support_become_root: Enable file creation in user namespaces

[Jonathan Nieder]

Hi,

Florian Weimer wrote:

> Without UID/GID maps, file creation will file with EOVERFLOW.
>
> This patch is based on DJ Delorie's work on container testing.
>
> 2017-11-17  Florian Weimer  <fweimer@redhat.com>
>
> 	support_become_root: Enable file creation in namespaces.
> 	* support/support_become_root.c (setup_mapping): New function.
> 	(support_become_root): Call it.

Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>

Thank you.