GNU bug report logs - #21096
Useradd, usermod do not use the target to read groups from when using the -R parameter

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Olliver Schinagl <o.schinagl <at> ultimaker.com>
To: bug-coreutils <at> gnu.org
Subject: Useradd, usermod do not use the target to read groups from when using
 the -R parameter
Date: Mon, 20 Jul 2015 10:12:18 +0200

Hi list,

I'm trying to generate a rootfs and am using a script to add users, 
groups etc. I first add a group via groupadd -R ${ROOTFS_TARGET} 
somegroup which works fine.
Using useradd with the -R parameter, to add a user also works as 
expected, until i try to add the -a -G somegroup options. Using usermod 
after creating the group and doing -a -G somegroup identically fails 
informing us there is no such group, somegroup.

It appears both usermod and useradd use the local /etc/group rather then 
what is supplied via the -R parameter. A workaround for now, is to use 
chroot directly, chroot ${TARGET} usermod -a -G somegroup someuser, but 
that only works if coreutils (or busybox (without useradd/usermod)) are 
already installed on the target, which may not be there (yet/at all).

Am I doing something wrong or is this indeed a bug in the coreutils?

I'm using debian jessie's 8.23-4 on amd64

Olliver

-- 
Met vriendelijke groeten, Kind regards, 与亲切的问候

Olliver Schinagl
Research & Development
Ultimaker B.V.


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Message #8 received at 21096 <at> debbugs.gnu.org (full text, mbox):

From: Assaf Gordon <assafgordon <at> gmail.com>
To: Olliver Schinagl <o.schinagl <at> ultimaker.com>, 21096 <at> debbugs.gnu.org
Subject: Re: bug#21096: Useradd, usermod do not use the target to read groups
 from when using the -R parameter
Date: Mon, 20 Jul 2015 11:59:58 -0400

Hello,

On 07/20/2015 04:12 AM, Olliver Schinagl wrote:
<...>
> It appears both usermod and useradd use the local /etc/group rather
> then what is supplied via the -R parameter.
<...>
> Am I doing something wrong or is this indeed a bug in the coreutils?

It might be a bug, but not in coreutils - these programs are not part of coreutils.

> I'm using debian jessie's 8.23-4 on amd64

It seems that in Debian, these programs are part of the 'passwd' package,
whose source is maintained here (as upstream of the 'shadow' package):
  http://pkg-shadow.alioth.debian.org/features.php
You could try asking here:
  http://pkg-shadow.alioth.debian.org/getinvolved.php

regards,
 - assaf

Message #15 received at 21096 <at> debbugs.gnu.org (full text, mbox):

From: Olliver Schinagl <o.schinagl <at> ultimaker.com>
To: Assaf Gordon <assafgordon <at> gmail.com>, 21096 <at> debbugs.gnu.org
Subject: Re: bug#21096: Useradd, usermod do not use the target to read groups
 from when using the -R parameter
Date: Tue, 21 Jul 2015 10:51:49 +0200

Hey

On 20-07-15 17:59, Assaf Gordon wrote:
> Hello,
>
> On 07/20/2015 04:12 AM, Olliver Schinagl wrote:
> <...>
>> It appears both usermod and useradd use the local /etc/group rather
>> then what is supplied via the -R parameter.
> <...>
>> Am I doing something wrong or is this indeed a bug in the coreutils?
>
> It might be a bug, but not in coreutils - these programs are not part 
> of coreutils.
>
>> I'm using debian jessie's 8.23-4 on amd64
>
> It seems that in Debian, these programs are part of the 'passwd' package,
> whose source is maintained here (as upstream of the 'shadow' package):
>   http://pkg-shadow.alioth.debian.org/features.php
> You could try asking here:
>   http://pkg-shadow.alioth.debian.org/getinvolved.php
I feel so stupid for not noticing this. I thought I checked, but for 
some reason I thought it was in coreutils.

Sorry for the noise!
>
> regards,
>  - assaf
>

-- 
Met vriendelijke groeten, Kind regards, 与亲切的问候

Olliver Schinagl
Research & Development
Ultimaker B.V.


-- 


IMAGINE IT >> MAKE IT

Meet us online at Twitter <http://twitter.com/ultimaker>, Facebook 
<http://facebook.com/ultimaker>, Google+ <http://google.com/+Ultimaker>

www.ultimaker.com

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