Running from a web server ,on Mac OS Racket try to open pref-dir of admin user that installed Racket instead of the one of current-user

Hi,

it is not easy to reproduce as it requires, Mac OS, a web server running an application that run racket.

i run the web server that seems to run under user _www:

ps xau
_www 13856 0,0 0,6 410998272 204400 s007 S+ 11:52 0:00.63 /Applications/Racket/bin/racket

but when the web application using racket try to use the preference file it fall back to the one of me, mattei, administrator of the host, as seen in the output of httpd log:

[3] => interpole-fields : Racket/Scheme+ (find-system-path 'pref-file): /Users/mattei/Library/Preferences/org.racket-lang.prefs.rktd

Racket must use the preference file from _www which is the proprietary of the Rackett running process.

Start by reproducing the report on macOS with a web server running under _www, then inspect the behavior of (find-system-path 'pref-file') and the logged preference path. Determine why the process uses /Users/mattei/Library/Preferences instead of the _www user's location; done means the web-server process resolves its own preference file.