Dear Rasmus, In message <[email protected]> you wrote: > This adds a way to call a "function" defined in the environment with > arguments. I.e., whereas > > run foo > > requires one to set the (shell or environment) variables referenced > from foo beforehand, with this one can instead do > > call foo arg1 arg2 arg3 > > and use $1... up to $9 in the definition of foo. $# is set so foo can > make decisions based on that, and ${3:-default} works as expected.
This is definitely a useful idea. But... ...the current version of hush in U-Boot is old, has a number of known bugs and shortcomings, and I really recommend not to adding any new features to it, because that would makie an update to a more recent version even less likely. So the first step before such extensions should be to update hush. In that process (which might be more of a new port) one should consider the possibility of keeping a little more of the functionality - memory restrictins today are not so strict any more as they were when hush was originally added. One feature that would definitely be useful is command substitution. All this needs a bit of a long term maintainable concept. Quick hacking of the ancient code is not a good idea. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: [email protected] God runs electromagnetics by wave theory on Monday, Wednesday, and Friday, and the Devil runs them by quantum theory on Tuesday, Thurs- day, and Saturday. -- William Bragg
