On 11/03/2014 08:55 AM, Mark Hatle wrote:
On 11/2/14, 4:48 AM, Peter A. Bigot wrote:
A classic approach to building SD card images with varying rootfs sizes
is to create the filesystem and unpack a tar rootfs image onto it. When
done outside pseudo the encoded user and group names from the tar file
are converted to identifiers using host files, which often result in
incorrect assignment for common names like messagebus and ntp.
A solution is to create the rootfs archive using the numeric values
obtained from the target /etc files under pseudo, rather than the
corresponding names. This series provides this function as a new image
file format "nug.tar".
Peter A. Bigot (2):
image_types.bbclass: whitespace and reorder
image_types.bbclass: add tar --numeric-owner support
meta/classes/image_types.bbclass | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
I think this is incorrect.
The current tar archives contain both the uname/gname -and- uid/gid.
When you extract, if you pass --numeric-owner it will switch from name
to number. (At least it has whenever I've done it.) The default
though is to use the uname/gname.
You're correct; both are stored per:
http://www.gnu.org/software/tar/manual/html_node/Standard.html
This should probably be publicized more widely, since when the issue
came up recently I wasn't the only one who discovered the hand-generated
images had the wrong uid/gid values for non-root files. Unnecessarily,
as it turns out: adding --numeric-owner to the unpack does solve the
problem.
Thanks. I'll archive both patches in patchwork (the first is still
valid, but is now unmotivated).
Peter
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