[yocto] Installation order question with RPM backend

[Xu, Dongxiao]

On Wed, 2012-04-11 at 10:25 -0500, Mark Hatle wrote:
> On 4/11/12 10:14 AM, Xu, Dongxiao wrote:
> > Hi Mark,
> >
> > I met a strange issue while using RPM to generate the rootfs.
> >
> > In the installation list, if we have 2 RPM packages, say A.rpm and
> > B.rpm. package A RDEPENDS on package B. While installing the two
> > packages? Does RPM ensures to install B first and then install A?
> >
> > The real issue is: we have certain packages that need to run
> > useradd/groupadd at rootfs time, for example, the dbus. However the
> > useradd/groupadd bbclass RDEPENDS on base-files, which provides
> > the /etc/group file. While installing the final image, sometimes we saw
> > it installs dbus firstly and then base-files, causing the
> > useradd/groupadd script error since it could not find /etc/group file.
> 
> it does enforce install order, however the /etc/group, /etc/passwd files (last 
> time I checked) were being put into place by the post install scripts.  The 
> scripting order is handled somewhat independently of the package install order. 
>   (post install scripts get delayed intentionally for performance reasons. 
> There is a way to hint a dependency for them as well...)
> 
> The passwd/group files are fairly unique files, and generally are installed 
> -first- (individually) before any other packages on most RPM installations. 
> After that the methods and install ordering works...
> 
But does the following log indicates the dbus-1 is installed before
base-passwd?

dbus-1                ##################################################
 Adding system startup
for /distro/sdb/build-basic/tmp/work/qemux86-poky-linux/hob-image-hob-basic-1.0-r0/rootfs/etc/init.d/dbus-1.
kernel-module-uvesafb ##################################################
libusb-compat         ##################################################
base-passwd           ##################################################

Thanks,
Dongxiao

> --Mark
> 
> > I tried ipk and it doesn't have problem since it ensures to install
> > base-files firstly.
> >
> > Any comment is welcome.
> >
> > Thanks,
> > Dongxiao
> >
>