[U-Boot-Users] Can a standalone app modify an environment variable?

[Edward Jubenville]

Is it possible to modify environment variables from a standalone application
in u-boot?

I've written a standalone app that reads and prints a 48-bit ethernet MAC
address from a Dallas/Maxim DS2502-E48 chip on a custom board.  I would like
the app to directly modify the "ethaddr" environment variable, rather than
relying on the user to retype the printed MAC address into a setenv command.

I looked at the standalone section of the readme, and at the exports.h file,
but I didn't see any explicit hooks to read or write environment variables.
I saw the secion on accessing u-boot environment variables in Linux, but
that does seem to be applicable.  Are environment variables somehow
accessible through the "global_data" pointer declared in exports.h?

I'm using u-boot 1.1.4.

Ed Jubenville