[racket] Does anyone know how to use launcher/launcher?

> I can see that an empty file has been constructed:
>
> ####################################
> fermi ~/work/whalesong $ ls -l hi
> -r-xr-xr-x 1 dyoo nogroup 0 Jun 14 15:49 hi*
> ####################################
>
> At the very least, the executable bit is set.  I'm about to start
> looking through the source to launcher/launcher to figure out what's
> going on, but want to double check: am I misusing the library?


Bug tracked!  There's a missing condition that needs to be added: the
launcher library assumes that the template file is writable, because
it uses copy-file to move it into the destination.  However, on my
setup here in the Brown CS lab, the Racket installation is shared, and
none of the collection files are user-writable.  So the
template-writing function must use file-or-directory-permissions.


I was about to write a patch, but encountered what looks like a bug to
me.  I've been staring at the bit patterns for read,write,execute in:

http://docs.racket-lang.org/reference/Filesystem.html#(def._((lib._racket/file..rkt)._user-read-bit))

Is it just me, or are the bits for read and execute backwards?