[OE-core] [PATCH 2/7] shadow: add a -native recipe with customized utilities

[Scott Garman]

On 06/01/2011 02:47 AM, Phil Blundell wrote:
> On Tue, 2011-05-31 at 12:53 -0700, Scott Garman wrote:
>> This adds a -native recipe for the shadow utilities.
>>
>> The custom --root option allows the the following utilities to be
>> run within a chroot when invoked under pseudo:
>
> Rather than patching the code for all these utilities, can't you just
> wrap them in a call to chroot(8)?  That is, make useradd.bbclass do:
>
> eval $PSEUDO chroot ${STAGING_DIR_TARGET} useradd ...
>
> rather than the existing
>
> eval $PSEUDO useradd --root ${STAGING_DIR_TARGET} ...

That's a reasonable suggestion. I haven't tried it yet, but I have found 
that pseudo's chroot(2) implementation is not complete. One of the cases 
where it does not work is when forking child processes, which breaks the 
jail and the child processes are no longer chroot'ed.

My guess is that chroot(8) is going to call chroot(2) and then fork a 
child process to run its additional arguments.

cc'ing Mark directly in case he has additional comments or needs to 
correct me.

Scott

-- 
Scott Garman
Embedded Linux Engineer - Yocto Project
Intel Open Source Technology Center