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#!/bin/bash
# /etc/init.d/odysseus
### BEGIN INIT INFO
# Provides:   odysseus
# Required-Start: $local_fs $remote_fs
# Required-Stop:  $local_fs $remote_fs
# Should-Start:   $network
# Should-Stop:    $network
# Default-Start:  2 3 4 5
# Default-Stop:   0 1 6
# Short-Description:    Odysseus server
# Description:    Init script for the Odysseus
### END INIT INFO
NAME=odysseus
DESC="Odysseus data stream management system"
USERNAME=odysseus
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME
SCREENNAME=$NAME.screen
DAEMON=$NAMEstartOdysseus
DAEMON_PATH="/path/to/odysseus/startOdysseus"
ME=`whoami`
as_user() {
    if [ $ME == $USERNAME ] ; then
        bash -c "$1"
    else
        su $USERNAME -s /bin/bash -c "$1"
    fi
}
force_exit() {
    echo ""
    echo "SIGINIT CALLED - FORCE EXITING!"
    rm $PIDFILE
    ps aux | grep -e '$DAEMON_PATH/$DAEMON' | grep -v grep | awk '{print $2}' | xargs -i kill {}
    ps aux | grep -e '$SCREENNAME' | grep -v grep | awk '{print $2}' | xargs -i kill {}
    ps aux | grep -e '$SCRIPTNAME' | grep -v grep | awk '{print $2}' | xargs -i kill {}
     
    exit 1
}
do_command() {
    as_user "screen -p 0 -S $SCREENNAME -X eval 'stuff \"$1\"\015'"
}
do_start() {
    printf "%-50s" "Starting $NAME..."
    as_user "screen -c /dev/null -dmS $SCREENNAME $DAEMON_PATH/$DAEMON"
    as_user "screen -list | grep "\.$SCREENNAME" | cut -f1 -d'.' | tr -d -c 0-9 > $PIDFILE"
    PID=`cat $PIDFILE`
    if [ -z $PID ]; then
    printf "%s\n" "Fail"
    else
    printf "%s\n" "Ok"
    fi
}
do_stop() {
    printf "%-50s" "Stopping $NAME"
    if [ -f $PIDFILE ]; then
        do_command exit
        sleep 0.5
        as_user "rm $PIDFILE"
        printf "%s\n" "Ok"
        rm -f $PIDFILE
    else
    printf "%s\n" "pidfile not found"
    fi
}
do_status() {
    printf "%-50s" "Checking $NAME..."
    if [ -f $PIDFILE ]; then
    PID=`cat $PIDFILE`
    if [ -z "`ps axf | grep ${PID} | grep -v grep`" ]; then
        printf "%s\n" "Process dead but pidfile exists"
    else
        echo "Running"
    fi
    else
    printf "%s\n" "Service not running"
    fi
}
trap force_exit SIGINT
case "$1" in
  start)
    do_start
    ;;
  stop)
    do_stop
    ;;
  restart)
    do_stop
    do_start
    ;;
  status)
    do_status
    ;;
  command)
    if [ $# -gt 1 ]; then
      shift
      do_command "$*"
    else
      echo "Must specify command (try 'help'?)"
    fi
    ;;
  *)
  echo "Usage: $0 {start|stop|status|restart|command \"command\"}"
  exit 1
  ;;
esac
exit 0