Upstart - run a command as another user while preserving /etc/environment

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http://serverfault.com – G'day, I'm trying to run a command/service on startup with Upstart as a non-privileged user, while preserving /etc/environment. I had some luck in a shell with exec sudo -u user1 -i "/usr/bin/foo /opt/bar >> /var/log/bar.log 2>&1" However, Upstart doesn't seem to like it (haven't been able to figure out why). I know the general advice is to use su and I had some success with that by manually sourcing a file like /etc/environment.local, but had problems getting Upstart to monitor the correct PID (it kept going after bash, instead of /usr/bin/foo, thus the attempt at sudo. Any (HowTos)