Update barebox on mmc without touching partition table

Sascha Hauer s.hauer at pengutronix.de
Fri Apr 8 09:21:27 EDT 2011

Hi Thomas,

On Fri, Apr 08, 2011 at 11:18:36AM +0200, Thomas Mayer wrote:
> Hi,
> to copy barebox to a mmc I use the command "dd if=barebox.bin
> of=/dev/sdb bs=512 seek=2 skip=2 && sync". So I don't touch the
> first 0x400 bytes with contains the partition table and everything
> is fine.
> But I want to write a little script to update barebox itself via
> tftp. So I create a partition "/dev/self0" (0x00000 to 0x40000) and
> update barebox with "tftp barebox.bin /dev/self0". The problem is
> that barebox write the first 0x400 bytes too and overwrite the
> partition table .
> Is there any way to "seek" and "skip" with barebox?

Not directly. What you can do is this:

tftp barebox.bin
memcpy -s barebox.bin -d /dev/self0 512 0


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