"usermod -aG group user" not accepted

Technical Support
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1

Hello,

I am trying to append the following to my .bb Image file:

inherit extrausers  
EXTRA_USERS_PARAMS = " \  
    usermod -P password root; \    
    useradd -P pass2 misa; \   
    usermod -aG wheel misa;"

but the result is an error with:

ERROR: console-misa-image-2.7.3-r0 do_rootfs: console-misa-image: usermod command did not succeed.
ERROR: console-misa-image-2.7.3-r0 do_rootfs: Function failed: set_user_group (log file is located at /work/apalis/oe-core-misa/build/tmp-glibc/work/apalis_imx6_misa-angstrom-linux-gnueabi/console-misa-image/2.7.3-r0/temp/log.do_rootfs.24442)

If I remove the last “usermod -aG wheel misa” the build is fine.

I tried all combinations:

“usermod -a -G wheel misa” and also
“usermod -aG wheel misa”

with no success.

If I put :

EXTRA_USERS_PARAMS = " \  
    usermod -P password root; \    
    useradd -P pass2 misa; \  
    usermod -G wheel misa;"

the build is also ok.

Any ideas why I can’t use “usermod -aG wheel misa” ?

Thanks.

Nicola

Error while building Torizon 6
2

Ok, the problem is due to the group wheel not existing at the time.

So, when is the group wheel created during the build of the Image ? I tried to look in meta-toradex-* and openembedded-core, but there is no obvious answer.

3

Hi

I guess that systemd creates whatever user/group is missing from its ‘usr/lib/sysusers.d/basic.conf’ list during boot.

As you already found out for your use case you likely only need to create the wheel group additionally.

Max

4

Another solution might be to add another file in the sysusers.d directory to let systemd create the additional users as well. The syntax of the file is documented here.