init.d script for Unicorn with Gitorious

gitorious-unicorn-initd-script.sh

#!/bin/sh

### BEGIN INIT INFO
# Provides: gitorious-unicorn
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Control the Gitorious application server
# Description: Unicorn is Gitorious' application server, accepting
#              requests via a frontend web server like Nginx
### END INIT INFO

# Source function library.

. /etc/init.d/functions

UNICORN_PIDFILE="/var/www/gitorious/app/tmp/pids/unicorn.pid"

start_unicorn() {
    /var/www/gitorious/app/bin/unicorn -c config/unicorn.rb -D && echo_success || echo_failure
    retval=$?
    echo "Starting unicorn"
}

stop_unicorn() {
    if _readpid; then
	kill -QUIT $unicorn_pid && echo_success || echo_failure
	echo "Stopping"
	retval=0
    else
	retval=7
    fi
}

restart_unicorn() {
    stop_unicorn && start_unicorn
}
_readpid() {
    if [ -f $UNICORN_PIDFILE ]; then
	read unicorn_pid < $UNICORN_PIDFILE
	return 0
    else
	return 1
    fi
}

status_unicorn() {
    if _readpid; then
	ps -p $unicorn_pid >/dev/null 2>&1 && echo_success || echo_failure
	echo "Unicorn status"
	retval=0
    else
	echo_failure
	echo "Unicorn status"
	retval=4
    fi
}

reload_unicorn() {
    if _readpid; then
	kill -USR2 $unicorn_pid && echo_success || echo_failure
	echo "Reloading Unicorn"
	retval=0
    else
	echo_failure
	echo "Unicorn isn't running"
	retval=7
    fi
}
case "$1" in
    start)
	start_unicorn
	;;
    stop)
	stop_unicorn
	;;
    restart)
	restart_unicorn
	;;
    status)
	status_unicorn
	;;
    reload)
	reload_unicorn
	;;
    *)
	echo "$0 start|stop|restart|reload|status"
	retval=2
	;;
esac

exit $retval