Re: [U-Boot] [PATCH] Handle environment variables like commands

Wolfgang Denk wrote:

Good catch. Yes, this must be prevented. Any variable named "builtin" must be ignored here - i. e. we should issue an erro when someone tries a "setenv", and ignore this variable explicitly (just in case someone sneaks this into the default environment, or uses un-fixed Linux tools to create such a variable).

I know, I wanted to know which is the preferred method to avoid that. One way is to avoid to set the variable, as you suggest. The other way is never execute a variable with the name "builtin" in the command interpreter: "setenv builtin <something>" remains possible but "builtin <command>" calls always the U-Boot commands.

Best regards, Stefano Babic