[OE-core] [PATCH 1/3] dbus-test: Fix QA host-contamination errors

[Richard Purdie]

On Mon, 2020-03-02 at 10:49 -0800, Khem Raj wrote:
> On 3/1/20 9:05 AM, Richard Purdie wrote:
> > On Sun, 2020-03-01 at 08:20 +0000, Richard Purdie wrote:
> > > On Sun, 2020-03-01 at 00:17 -0800, Khem Raj wrote:
> > > I understand the need for the fixes, I'm just very concerned we
> > > have
> > > what amounts to undetected non-determinism in the build :(
> > > 
> > > I'm more concerned about fixing that (and ensuring we can
> > > detect/fix
> > > all cases) than I am about the individual errors.
> > 
> > I did a bit more thinking/checking on this.
> > 
> > An interesting command to experiment with is:
> > 
> > $ touch /tmp/test; ls -la /tmp/test; ./tmp/sysroots-
> > components/x86_64/pseudo-native/usr/bin/pseudo sh -c "ls -la
> > /tmp/test*; cp /tmp/test /tmp/test2; ls -la /tmp/test*; rm
> > /tmp/test*"
> > 
> > which for me shows:
> > 
> > -rw-rw-r-- 1 richard richard 0 Mar  1 17:03 /tmp/test
> > Warning: PSEUDO_PREFIX unset, defaulting to XXX./tmp/sysroots-
> > components/x86_64/pseudo-native/usr.
> > -rw-rw-r-- 1 1000 1000 0 Mar  1 17:03 /tmp/test
> > -rw-rw-r-- 1 1000 1000 0 Mar  1 17:03 /tmp/test
> > -rw-rw-r-- 1    0    0 0 Mar  1 17:03 /tmp/test2
> > 
> > Can you see if that is different on your two machines?
> 
> above cmd output is exactly same as yours.
> 
> -rw-r--r-- 1 build build 0 Mar  2 18:49 /tmp/test
> Warning: PSEUDO_PREFIX unset, defaulting to 
> /mnt/b/yoe/build/./tmp/sysroots-components/x86_64/pseudo-native/usr.
> -rw-r--r-- 1 1000 1000 0 Mar  2 18:49 /tmp/test
> -rw-r--r-- 1 1000 1000 0 Mar  2 18:49 /tmp/test
> -rw-r--r-- 1    0    0 0 Mar  2 18:49 /tmp/test2

Hmm, this means the test is flawed as we need to find out how
/tmp/test2 becomes owned by 1000.1000.

Any ideas how we can simplify this down to reproduce that?

I did wonder if its coreutils-native was somehow creeping into DEPENDS
and had a different config between your two hosts which was causing
different behaviour but I'd need to check into whether that happens.

Any other ideas why the behaviour difference or how to reproduce it?

Cheers,

Richard