[U-Boot] Most appropriate and scriptable way of creating partition image files

[U-Boot] Most appropriate and scriptable way of creating partition image files

[Arji Cot]

Hi,
I'm new at this, my problem is that I have the kernel, busybox and u-boot
already build for my target platform, I'm not sure what is the most
appropriate way of creating the final ".img" file out of the files that I
already have .

I need to create 2 partitions, 1 vfat/fat32 for the boot and 1 partition
for the rootfs, the resulting 2 .img files will be burned on an eMMC using
the software provided by the vendor, so burning it's not the issue here .

I would like to have a more "scriptable" alternative to using dd, mounting,
writing and sync and then unmount the partition each time I need to create
an img file .

I'm using a linux 64 bit box .

Thanks.

[U-Boot] Most appropriate and scriptable way of creating partition image files

[Alexander Dahl]

Hei hei,

Am Donnerstag, 14. November 2019, 20:54:15 CET schrieb Arji Cot:
> I'm new at this, my problem is that I have the kernel, busybox and u-boot
> already build for my target platform, I'm not sure what is the most
> appropriate way of creating the final ".img" file out of the files that I
> already have .

ptxdist [1] uses genimage [2]. It's available for buildroot [3], too, however 
I don't know if they actually use it.

> I need to create 2 partitions, 1 vfat/fat32 for the boot and 1 partition
> for the rootfs, the resulting 2 .img files will be burned on an eMMC using
> the software provided by the vendor, so burning it's not the issue here .

Sounds like a usual usecase for genimage.

> I would like to have a more "scriptable" alternative to using dd, mounting,
> writing and sync and then unmount the partition each time I need to create
> an img file .

Well genimage works with config files, but that should work for you.

> I'm using a linux 64 bit box .

Who doesn't? ;-)

Greets
Alex

[1] https://www.ptxdist.org/
[2] https://github.com/pengutronix/genimage
[3] https://buildroot.org/