How /etc/shadow packed into my final image?

How /etc/shadow packed into my final image?

[Bacheh Karaji]

[-- Attachment #1: Type: text/plain, Size: 178 bytes --]

Hi,
I wanted to modify the content of /etc/shadow,but don't know how /etc/shadow files is packed into final image.
Can anybody how it is packed and way to modify it?Thanks


[-- Attachment #2: Type: text/html, Size: 594 bytes --]

Re: How /etc/shadow packed into my final image?

[ChenQi]

[-- Attachment #1: Type: text/plain, Size: 1149 bytes --]

On 10/24/2017 07:58 PM, Bacheh Karaji wrote:
> Hi,
>
> I wanted to modify the content of /etc/shadow,
> but don't know how /etc/shadow files is packed into final image.
>
> Can anybody how it is packed and way to modify it?
> Thanks
>
>
>
>

The file is created in postinst of the shadow package.

Codes are like below:
root@qemux86-64:~# rpm -q --scripts shadow
postinstall scriptlet (using /bin/sh):
# shadow - postinst
     if [ "x$D" != "x" ]; then
       rootarg="--root $D"
     else
       rootarg=""
     fi

     pwconv $rootarg || exit 1
     grpconv $rootarg || exit 1
[snip]

There are several ways to modify the file, depending on your purpose.
If you just want to modify/add/delete user/group in recipe, please try 
to make use of useradd*.bbclass.
http://www.yoctoproject.org/docs/2.3.2/mega-manual/mega-manual.html#ref-classes-useradd

If you want to do user/group operation in conf file, please try to make 
use of extrausers.bbclass.
http://www.yoctoproject.org/docs/2.3.2/mega-manual/mega-manual.html#ref-classes-extrausers

The above should be basically enough.

Best Regards,
Chen Qi


[-- Attachment #2: Type: text/html, Size: 2705 bytes --]

Re: How /etc/shadow packed into my final image?

[Bacheh Karaji]

[-- Attachment #1: Type: text/plain, Size: 1338 bytes --]


OH! Thank you! I had forgotten about that.

 

    On Wednesday, October 25, 2017 6:22 AM, ChenQi <Qi.Chen@windriver.com> wrote:
 

  On 10/24/2017 07:58 PM, Bacheh Karaji wrote:
  
 
 Hi, 
  I wanted to modify the content of /etc/shadow, but don't know how /etc/shadow files is packed into final image. 
  Can anybody how it is packed and way to modify it? Thanks 
 
  
  
 
 The file is created in postinst of the shadow package.
 
 Codes are like below:
 root@qemux86-64:~# rpm -q --scripts shadow
 postinstall scriptlet (using /bin/sh):
 # shadow - postinst
     if [ "x$D" != "x" ]; then
       rootarg="--root $D"
     else
       rootarg=""
     fi
 
     pwconv $rootarg || exit 1
     grpconv $rootarg || exit 1
 [snip]
 
 There are several ways to modify the file, depending on your purpose.
 If you just want to modify/add/delete user/group in recipe, please try to make use of useradd*.bbclass.
http://www.yoctoproject.org/docs/2.3.2/mega-manual/mega-manual.html#ref-classes-useradd
 
 If you want to do user/group operation in conf file, please try to make use of extrausers.bbclass.
http://www.yoctoproject.org/docs/2.3.2/mega-manual/mega-manual.html#ref-classes-extrausers
 
 The above should be basically enough.
 
 Best Regards,
 Chen Qi
 
 

   

[-- Attachment #2: Type: text/html, Size: 4370 bytes --]

Re: How /etc/shadow packed into my final image?

[Zoran Stojsavljevic]

[-- Attachment #1: Type: text/plain, Size: 2295 bytes --]

Hello Chen,

Very interesting answer you did give on this email thread... I have learned
something useful, indeed. :-)

I did try what you have suggested on target, but also, out of curiosity, on
the host (Fedora 26).

And here is what I have on the host (CLI transcript follows):

[user@localhost modules]$ uname -r
4.13.8-200.fc26.x86_64
[user@localhost modules]$ rpm -qa | grep shadow
shadow-utils-4.3.1-3.fc26.x86_64
[user@localhost modules]$ rpm -q --scripts shadow
package shadow is not installed
[user@localhost modules]$ rpm -q --scripts shadow-utils
[user@localhost modules]$

I was, after all, surprised (expected the same/similar). Any idea why this
is different?

Should be the same/similar. I'll investigate further the host problem
(seems, something/some package is missing/not installed).

Thank you,
Zoran

On Wed, Oct 25, 2017 at 4:53 AM, ChenQi <Qi.Chen@windriver.com> wrote:

> On 10/24/2017 07:58 PM, Bacheh Karaji wrote:
>
> Hi,
>
> I wanted to modify the content of /etc/shadow,
> but don't know how /etc/shadow files is packed into final image.
>
> Can anybody how it is packed and way to modify it?
> Thanks
>
>
>
>
>
> The file is created in postinst of the shadow package.
>
> Codes are like below:
> root@qemux86-64:~# rpm -q --scripts shadow
> postinstall scriptlet (using /bin/sh):
> # shadow - postinst
>     if [ "x$D" != "x" ]; then
>       rootarg="--root $D"
>     else
>       rootarg=""
>     fi
>
>     pwconv $rootarg || exit 1
>     grpconv $rootarg || exit 1
> [snip]
>
> There are several ways to modify the file, depending on your purpose.
> If you just want to modify/add/delete user/group in recipe, please try to
> make use of useradd*.bbclass.
> http://www.yoctoproject.org/docs/2.3.2/mega-manual/mega-
> manual.html#ref-classes-useradd
>
> If you want to do user/group operation in conf file, please try to make
> use of extrausers.bbclass.
> http://www.yoctoproject.org/docs/2.3.2/mega-manual/mega-
> manual.html#ref-classes-extrausers
>
> The above should be basically enough.
>
> Best Regards,
> Chen Qi
>
>
> --
> _______________________________________________
> yocto mailing list
> yocto@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/yocto
>
>

[-- Attachment #2: Type: text/html, Size: 4439 bytes --]