Re: [PATCH 2/2] isoimage-isohybrid-isar: fix disk full if no initrd exists

["'Quirin Gylstorff' via isar-users" <isar-users@googlegroups.com>]

On 11/26/25 12:43, 'Quirin Gylstorff' via isar-users wrote:
> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
> 
> If no initrd was generated during the rootfs build the wic plugin
> uses the existing rootfs as initrd. The plugin uses shutil.copytree
> to copy the rootfs to a new folder. As the rootfs contains `/dev/full`
> this will fill the disk until it is full.
> 
> To avoid this error ignore all files in `/dev/` of the rootfs.
> 
> Tested-by:    Herbert Bernecker <herbert.bernecker@siemens.com>
> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
> ---
/dev should be populate by mmdebstrap so another way should be
--skip=output/mknod or  --skip=output/dev  but during the initial
testing these option broke package builds.

Quirin

>   .../lib/wic/plugins/source/isoimage-isohybrid-isar.py     | 8 +++++++-
>   1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/meta/scripts/lib/wic/plugins/source/isoimage-isohybrid-isar.py b/meta/scripts/lib/wic/plugins/source/isoimage-isohybrid-isar.py
> index 690e291e..fb6c6b39 100644
> --- a/meta/scripts/lib/wic/plugins/source/isoimage-isohybrid-isar.py
> +++ b/meta/scripts/lib/wic/plugins/source/isoimage-isohybrid-isar.py
> @@ -203,8 +203,14 @@ class IsoImagePlugin(SourcePlugin):
>               # Create initrd from rootfs directory
>               initrd = "%s/initrd.cpio.gz" % cr_workdir
>               initrd_dir = "%s/INITRD" % cr_workdir
> +            def ignore_contents(src, names):
> +                if os.path.basename(src) == 'dev':
> +                    return names
> +                return []
> +
>               shutil.copytree("%s" % rootfs_dir, \
> -                            "%s" % initrd_dir, symlinks=True)
> +                            "%s" % initrd_dir, \
> +                            ignore=ignore_contents, symlinks=True)
>   
>               if os.path.isfile("%s/init" % rootfs_dir):
>                   shutil.copy2("%s/init" % rootfs_dir, "%s/init" % initrd_dir)

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