[OE-core] [PATCH] image_types: Ensure /init exists for cpio rootfs archives

[Andrea Adami]

On Wed, Jan 4, 2012 at 1:07 AM, Saul Wold <sgw at linux.intel.com> wrote:
> On 12/28/2011 03:54 PM, Darren Hart wrote:
>>
>> <I sent this to the yocto list by mistake, forwarding here for comment>
>>
>> In order for the kernel to accept an initramfs as a rootfs,
>> it must have /init - even if it is an empty file. Touch /init
>> to ensure it exists for cpio and cpio.gz image types.
>>
>> When used with initrd and rootfs=/dev/ram0, this allows the
>> cpio and cpio.gz images to be used as the rootfs.
>>
>> Signed-off-by: Darren Hart<dvhart at linux.intel.com>
>> ---
>>  meta/classes/image_types.bbclass |   10 ++++++++--
>>  1 files changed, 8 insertions(+), 2 deletions(-)
>>
>> diff --git a/meta/classes/image_types.bbclass
>> b/meta/classes/image_types.bbclass
>> index 6893e38..ebff0ba 100644
>> --- a/meta/classes/image_types.bbclass
>> +++ b/meta/classes/image_types.bbclass
>> @@ -110,8 +110,14 @@ IMAGE_CMD_tar = "cd ${IMAGE_ROOTFS}&&  tar -cvf
>> ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME
>>  IMAGE_CMD_tar.gz = "cd ${IMAGE_ROOTFS}&&  tar -zcvf
>> ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.tar.gz ."
>>  IMAGE_CMD_tar.bz2 = "cd ${IMAGE_ROOTFS}&&  tar -jcvf
>> ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.tar.bz2 ."
>>  IMAGE_CMD_tar.xz = "cd ${IMAGE_ROOTFS}&&  tar --xz -cvf
>> ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.tar.xz ."
>> -IMAGE_CMD_cpio = "cd ${IMAGE_ROOTFS}&&  (find . | cpio -o -H
>> newc>${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio)"
>> -IMAGE_CMD_cpio.gz = "cd ${IMAGE_ROOTFS}&&  (find . | cpio -o -H newc |
>> gzip -c -9>${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio.gz)"
>> +IMAGE_CMD_cpio () {
>> +       touch ${IMAGE_ROOTFS}/init
>> +       cd ${IMAGE_ROOTFS}&&  (find . | cpio -o -H
>> newc>${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio)
>> +}
>> +IMAGE_CMD_cpio.gz () {
>> +       touch ${IMAGE_ROOTFS}/init
>> +       cd ${IMAGE_ROOTFS}&&  (find . | cpio -o -H newc | gzip -c
>> -9>${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio.gz)
>> +}
>>  IMAGE_CMD_cpio.xz = "type cpio>/dev/null; cd ${IMAGE_ROOTFS}&&  (find . |
>> cpio -o -H newc | xz -c ${XZ_COMPRESSION_LEVEL}
>> --check=${XZ_INTEGRITY_CHECK}>
>>  ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio.xz) ${EXTRA_IMAGECMD}"
>>  IMAGE_CMD_cpio.lzma = "type cpio>/dev/null; cd ${IMAGE_ROOTFS}&&  (find .
>> | cpio -o -H newc | xz --format=lzma -c ${XZ_COMPRESSION_LEVEL}
>> --check=${XZ_INTEGRITY_CHECK}>${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio.lzma)
>> ${EXTRA_IMAGECMD}"
>>
>
> This merged as is to OE-Core.
>
> Based on other emails, I will expect some update patch to address Andrea's
> comments.
>
> Thanks
>        Sau!
>
>
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hm.. something is going wrong... permission denied


touch: cannot touch
`/oe/oe-core/build/tmp-eglibc/work/poodle-oe-linux-gnueabi/initramfs-kexecboot-klibc-image-1.0-r0/rootfs/init':
Permission denied

Andrea