#!/bin/sh
exec 2>&1
cd /var/www/myapp
# what it currently looks like
exec chpst -u www-data:www-data /var/www/myapp/myapp
# what I'd ideally like to be able to do
FOO=bar BAZ=qux exec chpst -u www-data:www-data /var/www/myapp/myapp

exec chpst -u www-data:www-data env LOGNAME='www-data' /var/www/myapp/myapp