Detlev Zundel dzu@denx.de wrote on 2010-04-01 16:56:40:
Hi Jocke,
Hm... will this not make escaping impossible? Assume you want to pass
arg=${name}
to Linux. How would you escape this so it does NOT get expanded if you run process_macros() arbitrarily often?
Possibly, I never needed that though. One would probably need to add an escape char for that. Something like arg=${name}
Woudn't this then just cause another cycle through process_macros(), where it then gets substitured anyway? [Guess I gotta try this out.]
I am not sure what will happen, it was so man years ago. But I would guess that if you really want to pass arg=$(name) to the kernel you will probably need to do some adjustment.
To me it looks like the new code would indeed do a "greedy" substitution only stopping when no more substitutions can be done. This is very un-unixy and thus not something I'd like to see as a default behaviour.
Why not? What is gained by the current method?
Jocke