Re: [Bug-tar] [PATCH] add a numeric offset option for uid and gid manipulations

[Paul Eggert]

On 03/12/13 02:03, Glauber Costa wrote:
> With that, it is extremely useful when unpacking tar archives, to be
> able to add that offset to the end result. Specifying a user won't help,
> since the tar archive can have many

Sorry, I'm not following this part.  Why can't you extract the
tar image in a context where the mapping is already in place?
If user "foo" is host user ID 4000, for example, and you're running
in an environment where uid 0 maps to 10000, then presumably
user "foo" is namespace user 14000, which is what you want, no?