[U-Boot-Users] bootcmd

Hi,

I'm trying to figure out how to make my software field update process robust. Currently, my bootcmd is 'fsload 20000000 uImage; bootm 20000000'

Is there anyway for u-boot to determine, in one of these commands, that some command failed, and to do something else instead?

For example, if I failed to load uImage, could I check for its existence, and boot that instead?

My update process will copy the new image into the same partition as uImage, as uImage.new, and then rename uImage to uImage.old, rename uImage.new to uImage, and then delete uImage.old.

If something untoward should happen (like the idiot turns off the power in the middle of the update), I'm wondering how I can have u-boot get around this.

Thanks,

Matt