The unicorn init.d script to start/stop/restart the service

unicorn

#!/bin/sh
set -u
set -e

# Feel free to change any of the following variables for your app:
export PATH=/usr/local/bin:$PATH
export HOME=/home/deploy

APP_ROOT=/var/www/pragmaticly/current
PID=$APP_ROOT/tmp/pids/unicorn.pid
ENV=production
CMD="bundle exec unicorn_rails -D -E $ENV -c config/unicorn.conf.rb"

old_pid="$PID.oldbin"

cd $APP_ROOT || exit 1

sig () {
        test -s "$PID" && kill -$1 `cat $PID`
}

oldsig () {
        test -s $old_pid && kill -$1 `cat $old_pid`
}

workersig () {
  workerpid="$APP_ROOT/tmp/pids/unicorn.$2.pid"

  test -s "$workerpid" && kill -$1 `cat $workerpid`
}

case $1 in
start)
        sig 0 && echo >&2 "Already running" && exit 0
        $CMD
        ;;
stop)
        sig QUIT && exit 0
        echo >&2 "Not running"
        ;;
force-stop)
        sig TERM && exit 0
        echo >&2 "Not running"
        ;;
restart|reload)
        sig HUP && echo reloaded OK && exit 0
        echo >&2 "Couldn't reload, starting '$CMD' instead"
        $CMD
        ;;
upgrade)
        sig USR2 && exit 0
        echo >&2 "Couldn't upgrade, starting '$CMD' instead"
        $CMD
        ;;
kill_worker)
        workersig QUIT $2 && exit 0
        echo >&2 "Worker not running"
        ;;
rotate)
        sig USR1 && echo rotated logs OK && exit 0
        echo >&2 "Couldn't rotate logs" && exit 1
        ;;
*)
        echo >&2 "Usage: $0 <start|stop|restart|upgrade|rotate|force-stop>"
        exit 1
        ;;
esac