Re: [isar-cip-core][PATCH v2 4/6] customizations: Relocate /root under /home

From: Gylstorff Quirin <quirin.gylstorff@siemens.com>
To: Jan Kiszka <jan.kiszka@siemens.com>, cip-dev@lists.cip-project.org
Cc: Christian Storm <christian.storm@siemens.com>
Subject: Re: [isar-cip-core][PATCH v2 4/6] customizations: Relocate /root under /home
Date: Fri, 22 Apr 2022 14:22:25 +0200	[thread overview]
Message-ID: <f2eb1b22-0110-274e-9599-62d22b9ec133@siemens.com> (raw)
In-Reply-To: <c378b09452d1507e0f7c5de1c3d6543f2027b06e.1650613658.git.jan.kiszka@siemens.com>

On 4/22/22 09:47, Jan Kiszka wrote:
> From: Jan Kiszka <jan.kiszka@siemens.com>
> 
> This is needed for read-only rootfs setups. We could also update the
> account settings, but establishing a link comes with less surprises.
> 

What happens if the /home mount fails? Does the system fall back to / ?

This should be the behavior according to [1].

[1]: https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch03s14.html

Quirin

> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
> ---
>   recipes-core/customizations/files/postinst | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/recipes-core/customizations/files/postinst b/recipes-core/customizations/files/postinst
> index 9b553da..6ca309a 100644
> --- a/recipes-core/customizations/files/postinst
> +++ b/recipes-core/customizations/files/postinst
> @@ -17,3 +17,7 @@ echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
>   HOSTNAME=demo
>   echo "$HOSTNAME" > /etc/hostname
>   echo "127.0.0.1 $HOSTNAME" >> /etc/hosts
> +
> +# needed for read-only rootfs with writable /home
> +mv /root /home/
> +ln -s /home/root /root