GemInABox init.d Script

geminabox

#! /bin/bash

# GemInABox
# Maintainer: David Hooey

### BEGIN INIT INFO
# Provides:          geminabox
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Description:       Gem in a Box
### END INIT INFO

APP_ROOT="/home/rubygems"
RACK_PID="$APP_ROOT/rack.pid"
RACK_UP="/usr/local/bin/rackup -E production -D -P $RACK_PID"
NAME="rack"
DESC="GemInABox service"

check_pid(){
    if [ -f $RACK_PID ]; then
        PID=`cat $RACK_PID`
        STATUS=`ps aux | grep $PID | grep -v grep | wc -l`
    else
        STATUS=0
        PID=0
    fi
}

start() {
    cd $APP_ROOT
    check_pid
    if [ "$PID" -ne 0 -a "$STATUS" -ne 0 ]; then
        # Program is running, exit with error code 1.
        echo "Error! $DESC $NAME is currently running!"
        exit 1
    else
        if [ `whoami` = root ]; then
            sudo -u rubygems -H bash -l -c "$RACK_UP"
            echo "$DESC started"
        fi
    fi
}

stop() {
    cd $APP_ROOT
    check_pid
    if [ "$PID" -ne 0 -a "$STATUS" -ne 0 ]; then
        ## Program is running, stop it.
        kill -QUIT `cat $RACK_PID`
        rm "$RACK_PID" >> /dev/null
        echo "$DESC stopped"
    else
        ## Program is not running, exit with error.
        echo "Error! $DESC not started!"
        exit 1
    fi
}

status() {
    cd $APP_ROOT
    check_pid
    if [ "$PID" -ne 0 -a "$STATUS" -ne 0 ]; then
        echo "$DESC with PID $PID is running."
    else
        echo "$DESC is not running."
        exit 1
    fi
}

## Check to see if we are running as root first.
## Found at http://www.cyberciti.biz/tips/shell-root-user-check-script.html
if [ "$(id -u)" != "0" ]; then
    echo "This script must be run as root"
    exit 1
fi

case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        stop
        start
        ;;
    status)
        status
        ;;
    *)
        echo "Usage: sudo service geminabox {start|stop|restart}" >&2
        exit 1
        ;;
esac

exit 0