diff options
| -rw-r--r-- | classes/concatenated-image.bbclass | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/classes/concatenated-image.bbclass b/classes/concatenated-image.bbclass new file mode 100644 index 0000000000..5cf8d33c05 --- /dev/null +++ b/classes/concatenated-image.bbclass @@ -0,0 +1,38 @@ + +# +# define the FLASH_KERNEL_SIZE and FLASH_ROOT_SIZE in your machine.conf, +# and this class builds a simple, padded concatenated image of +# <kernel><padding><rootfs> and performs error checking that either +# kernel or rootfs isn't too large to fit. +# +concat_pack_image() { + # find latest kernel - is there a more general way to do this? + KERNEL=`ls -tr ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}* | tail -n 1` + if [ -z "$KERNEL" ]; then + oefatal "No kernel found in ${DEPLOY_DIR_IMAGE}. Was expecting a ${KERNEL_IMAGETYPE}\* file." + exit 1 + fi + ROOTFS=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.jffs2 + OUTPUT=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.flash.img + PADFILE=${DEPLOY_DIR_IMAGE}/padfile.zzz + KERNEL_SIZE_MAX_DEC=`echo ${FLASH_KERNEL_SIZE} | awk --non-decimal-data '{printf "%d\n", $1}' ` + ROOT_SIZE_MAX_DEC=`echo ${FLASH_ROOT_SIZE} | awk --non-decimal-data '{printf "%d\n", $1}' ` + KERNEL_SIZE=`ls -l $KERNEL | awk '{print $5}'` + if [ $KERNEL_SIZE -gt $KERNEL_SIZE_MAX_DEC ]; then + oefatal "Kernel too large at $KERNEL_SIZE bytes. Max is $KERNEL_SIZE_MAX_DEC." + exit 1 + fi + ROOT_SIZE=`ls -l $ROOTFS | awk '{print $5}'` + if [ $ROOT_SIZE -gt $ROOT_SIZE_MAX_DEC ]; then + oefatal "Rootfs is too large at $ROOT_SIZE bytes. Max is $ROOT_SIZE_MAX_DEC." + exit 1 + fi + PAD_SIZE=`echo "$KERNEL_SIZE_MAX_DEC - $KERNEL_SIZE" | bc ` + dd if=/dev/zero of=$PADFILE bs=$PAD_SIZE count=1 2>>/dev/null + cat $KERNEL $PADFILE $ROOTFS > $OUTPUT + rm -f $PADFILE + ls -l $OUTPUT +} + +IMAGE_POSTPROCESS_COMMAND += "concat_pack_image; " + |