[U-Boot] U-boot env variables parsing

[Wolfgang Denk]

Dear Joakim Tjernlund,

In message <OFEBF95CA1.44E68372-ONC12576F8.0043F4F7-C12576F8.0044D7F5 at transmode.se> you wrote:
>
>  linuxip=ip=$(ipaddr)::$(gatewayip):$(netmask):$(hostname):$(linuxif):off
>  tboot=setenv bootargs $(linuxroot) $(linuxip) $(extra);tftp 100000; bootm 100000
> 
> it was fairly simple to do but I don't think WD applied it since the old shell was obsolete

I don't think you ever posted this before. I cannot find any trace of
such a patch - not in the public archives nor locally.

>  		/* find macros in this token and replace them */
> -		process_macros (token, finaltoken);
> +		if(process_macros (token, finaltoken)){
> +		  strcpy(tmptoken,finaltoken);
> +		  while(process_macros (tmptoken, finaltoken))
> +			strcpy(tmptoken,finaltoken);
> +		}

Hm... will this not make escaping impossible? Assume you want to pass

	arg=${name}

to Linux. How would you escape this so it does NOT get expanded if
you run process_macros() arbitrarily often?

Best regards,

Wolfgang Denk

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