Dear James,
In message 5345D493.4080803@gmail.com you wrote:
Heh. As soon as you have to change _any_ code, you can as well upgrade.
I was hoping (in vain perhaps) to do my work modifying only the environment.
Yes, I understand this. But I have to admit that I don't see an easy way.
Hm... thinking about it, you _can_ do this, but it's a bit ugly...
POC code:
=> print ethaddr ipaddr serverip ethaddr=00:10:ec:01:08:84 ipaddr=192.168.100.6 serverip=192.168.1.1
=> echo E=$foo_ethaddr I=$foo_ipaddr S=$foo_serverip E= I= S=
=> setenv setvar 'setenv tmp "foo_$arg=$$arg"'
=> for arg in ethaddr ipaddr serverip ; do > run setvar > run tmp > echo E=$foo_ethaddr I=$foo_ipaddr S=$foo_serverip > done E=00:10:ec:01:08:84 I= S= E=00:10:ec:01:08:84 I=192.168.100.6 S= E=00:10:ec:01:08:84 I=192.168.100.6 S=192.168.1.1
As you can see, I'm useing a two-step approach to first constuct a command and then to run it. This "consumes" 2 environment variables ("tmp" and "arg"), but this should be an acceptable price...
This is a definite drawback to having an old U-Boot; I'm sure I would benefit from the bug fixes and other enhancements.
Yes.
Exporting a list of values sounds like a nice addition that would be helpful to me.
The new env command allows for a lot of interesting features, like maintaining a set of "user profiles", i. e. independent sets of environment settings which can be loaded and restored as you lik, including things like perfoming a "reset to factory defaults" (which still can be changed, i. e. you can update the factory default settings and are not limited to the fixed compiled in default env values.
I suppose, with my 2010.12, I could export everything to memory and then parse through it to find the values I need then import them. Sounds vaguely possible but it's probably more complex than doing the U-Boot upgrade.
You don't have enough tools in the shell to do this parsing by any scripts, so you would need code. And if you add new code, you change the binary anyway, so you could upgrade as well.
Best regards,
Wolfgang Denk