It is a LSB init script for the uWSGI Emperor mode.
sudo cp uwsgi-emperor /etc/init.d/
Put your uWSGI configs into /etc/uwsgi-emperor, and then run:
sudo service uwsgi-emperor start
It also supports stop, restart, force-reload, reload, and status.
The log of the uWSGI emperor will be placed at /var/log/uwsgi-emperor.log.