This didn't work for me with the following submission (in version 5.2): #lang plai (halt-on-errors #t)
On Sun, Jan 15, 2012 at 6:45 PM, Eli Barzilay <e...@barzilay.org> wrote: > 50 minutes ago, Robby Findler wrote: >> >> I'm not sure either (this is certainly not the only contract that's >> checked during the execution of PLAI programs, but maybe it's the >> only provide/contract one?), but once I disabled that, my sample >> solution for the next exercise went through. >> >> It would be good to know how to get a better short-term solution, >> however (like making a more relaxed sandbox that allows exists >> queries in the handin server). > > This is "easy": > > (parameterize ([sandbox-path-permissions '([exists "/"])]) > ...make the evaluator...) > > except that I think that in the context of the handin server you don't > create it directly. It's probably doable by making the change > globally, via a hook: > > Create a "hook.rkt" file with: > > #lang racket/base > (provide hook) > (require racket/sandbox) > (define (hook what session alist) > (when (eq? what 'server-start) > (sandbox-path-permissions '([exists "/"])))) > > Then wire it in with an entry in the config file that says: > > (hook-file "hook.rkt") > > Or, if you already have a hook, then add the parameter change to it. > > -- > ((lambda (x) (x x)) (lambda (x) (x x))) Eli Barzilay: > http://barzilay.org/ Maze is Life! ____________________ Racket Users list: http://lists.racket-lang.org/users
