Handle environment variables like commands
At the moment, the
command has to be used to execute the content of
an environment variable as a command sequence.
It is suggested that this behaviour is changed such, that the command interpreter
always checks for each command if an environment variable of this name exists.
If this is the case, then the content of the variable shall be executed.
That means that all U-Boot commands can be redefined by just defining
an environment variable with that name.
To be able to execute the built-in commands if needed even when they are redefined,
command shall be provided that operates similar to the
: the command
will always execute the code of the
command, no matter if it has been redefined in a
environment variable or not.
- 12 Oct 2008