[OE-core] dbus build host uid/gid leaking into target home directory

[Peter A. Bigot]

On 10/11/2014 04:10 PM, Gary Thomas wrote:
> On 2014-10-11 11:16, Peter A. Bigot wrote:
>> Back at 
>> http://lists.openembedded.org/pipermail/openembedded-core/2011-December/053836.html 
>> it was noted that the dbus home directory /var/lib/dbus on the target 
>> was using the
>> build host uid/gid.  Various discussion agreed this shouldn't happen, 
>> but there was no resolution in the thread.
>>
>> I found https://bugzilla.yoctoproject.org/show_bug.cgi?id=1711 which 
>> is marked fixed, but on a newly installed system I find:
>>
>> root at beaglebone:~# ls -l /var/lib
>> total 52
>> drwxr-xr-x 2 root root 4096 Oct 11  2014 alsa
>> drwxr-xr-x 2 root root 4096 Oct 11  2014 arpd
>> drwxr-xr-x 2 root root 4096 Oct 11 12:30 connman
>> drwxr-xr-x 2  102  105 4096 Oct 11  2014 dbus
>>
>> where the dbus uid/gid is from my host system as shown by:
>>
>> root at beaglebone:~# grep dbus /etc/passwd
>> messagebus:x:999:998::/var/lib/dbus:/bin/false
>> llc[140]$ grep dbus /etc/passwd
>> messagebus:x:102:105::/var/run/dbus:/bin/false
>>
>> This arises in an image extending core-image-base building meta-ti's 
>> version of beaglebone.  (I'm actually trying to fix the same problem 
>> arising in a patch intended to make sure
>> ntp's home directory exists, but the dbus one appears to be the same 
>> thing.)
>>
>> The suggested workaround for opkg of using a pkg_postinst script 
>> doesn't work in my case because the rpm post-install script gets run 
>> on the build host that's creating rootfs.The
>> ownership is wrong in the generated rootfs tar files whether or not 
>> there's a post-install script that tries to change it.
>>
>> For my ntp patch I verified that removing the package and installing 
>> it on the target does work as expected.
>>
>> Does anybody else see this sort of thing?
>>
>> If not, where in the image packaging code is the magic that's 
>> supposed to help pseudo record who's really supposed to own the files 
>> and re-apply that when the image packaging is done?
>
> It does not happen in my builds which are more-or-less stock
> Poky (I have my own distro and BSP layers).  Must be something
> going on in the meta-ti layer?
>
> Are you using the latest OE-core (or Poky/Yocto) master?

Thanks for the sanity check.

I'm using master of poky and meta-openembedded, right at the point of 
dizzy branch.  The problem is reproduced with a fresh bitbake 
core-image-base with these layers:

BBLAYERS ?= "\
     ${OE_META_SOURCES}/poky/meta \
     ${OE_META_SOURCES}/poky/meta-yocto \
     ${OE_META_SOURCES}/poky/meta-yocto-bsp \
     ${OE_META_SOURCES}/meta-openembedded/meta-filesystems \
     ${OE_META_SOURCES}/meta-openembedded/meta-networking \
     ${OE_META_SOURCES}/meta-openembedded/meta-oe \
     ${OE_META_SOURCES}/meta-openembedded/meta-systemd \
     ${OE_META_SOURCES}/meta-openembedded/meta-python \
     ${OE_META_SOURCES}/meta-qt3 \
"

and these customizations options in local.conf:

# Default machine
MACHINE ?= "beaglebone"

# Want to try this distro, but it enables security_flags.inc which
# requires recipe changes.
#DISTRO = "poky-lsb"
# So instead do some of the pieces so we can still use core-image-lsb*
DISTRO = "poky"
DISTROOVERRIDES = "poky:linuxstdbase"
DISTRO_FEATURES_append = " pam largefile"

# The future is systemd
DISTRO_FEATURES_append = " systemd"
VIRTUAL-RUNTIME_init_manager = "systemd"
DISTRO_FEATURES_BACKFILL_CONSIDERED = "sysvinit"

I did try commenting out the override for poky:linuxstdbase and it had 
no effect.  I'll try trimming out more stuff tomorrow.

Peter