Hi Richard,

On 2022-09-21 00:11, Richard Purdie wrote:

On Tue, 2022-09-20 at 23:05 +0200, Peter Bergin wrote:

Hi,

I'm working on a recipe for libtraceevent
(https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git) that is
needed for newer trace-cmd. I'm confused about an error I get during
do_package that I want some help with.

File: '<snip>/sources/poky/meta/lib/oe/sstatesig.py', lineno: 587,
function: process
     0583:                    else:
     0584:                        add_perm(stat.S_IXOTH, 'x')
     0585:
     0586:                    try:
 *** 0587:                        update_hash(" %10s" %
pwd.getpwuid(s.st_uid).pw_name)
     0588:                        update_hash(" %10s" %
grp.getgrgid(s.st_gid).gr_name)
     0589:                    except KeyError as e:
     0590:                        bb.warn("KeyError in %s" % path)
     0591:                        msg = ("KeyError: %s\nPath %s is
owned by uid %d, gid %d, which doesn't match "
Exception: Exception: KeyError: 'getpwuid(): uid not found: 1000'
Path ./package/usr/lib/libtraceevent.a is owned by uid 1000, gid 1004,
which doesn't match any user/group on target. This may be due to host
contamination.

ERROR: Logfile of failure stored in:
<snip>/build/<machine>/tmp/work/cortexa53-crypto-poky-linux/libtraceevent/1.6.2-r0/temp/log.do_package.3574262
ERROR: Task
(<snip>/sources/meta-openembedded/meta-oe/recipes-kernel/trace-cmd/libtraceevent_1.6.2.bb:do_package)
failed with exit code '1'

What happens is that during do_package the directory ${WORKDIR}/package
is moved to ${WORKDIR}/sstate-build-package and the sstate is
calculated. In that sequence in sstatesig.py the owner of the files are
checked and used in the hash calculations. By adding debug prints I have
seen that in normal case the s.st_uid in the code above evaluates to 0
for the files and directories. When looking in the file system my user
(1000/1004) owns them but I guess PSEUDO is involved here to fake root?
For some reason when checking the libraries build by libtraceevent in
./usr/lib/ the files reports to be owned by uid 1000 and the exection
above is raised. It is valid for ./usr/lib/libtraceevent.a and also
other files in the ./usr/lib directory. Before the files in ./usr/lib is
checked files from /usr/include has been checked for libtraceevent and
they have s.st_uid=0.

I've spent some time trying to understand this. Give up now and try this
forum if I can get some ideas. I share the recipe below.

Have you tried putting a:

chown root.root ${D}<files>

into do_install and checking if you force the ownership, whether that
helps?

It helped to add 'chown -R root.root ${D}${libdir}'. Thanks!

But curios to understand why. Anyway when looking into ${D} after I added chown the files is owned by the build user. I guess this is some pseudo function to have additional permission somewhere? Is is easy to explain? And normally I have a feeling that I don't need this, why is this package special?

Best regards,
/Peter