[RFC PATCH 1/1] cmd: nvedit: Forbid key to be empty.

[Wolfgang Denk]

Dear Francis,

In message <20210628193145.796999-2-francis.laniel at amarulasolutions.com> you wrote:
> Before this patch, it was possible to do the following using setenv:
> setenv '' foo
> Then, on next reboot, U-Boot will not be able to parse environment due to it
> having:
> =foo
>
> Now, if the above command is given, an error message is thrown and environment
> is not modified.
>
> Signed-off-by: Francis Laniel <francis.laniel at amarulasolutions.com>
> ---
>  cmd/nvedit.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/cmd/nvedit.c b/cmd/nvedit.c
> index d14ba10cef..64b7aef78d 100644
> --- a/cmd/nvedit.c
> +++ b/cmd/nvedit.c
> @@ -262,6 +262,11 @@ static int _do_env_set(int flag, int argc, char *const argv[], int env_flag)
>  		return 1;
>  	}
>  
> +	if (!strlen(name)) {

Instead of calling a library function here you could use the same
shortcut as in the patch you referenced:

	if (*name == 0) {

> +		printf("## Error: variable name cannot be empty\n");

 s/cannot/must not/  ??

Best regards,

Wolfgang Denk

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