#! /bin/sh
#
# skeleton	example file to build /etc/init.d/ scripts.
#		This file should be used to construct scripts for /etc/init.d.
#
#		Written by Miquel van Smoorenburg <miquels@cistron.nl>.
#		Modified for Debian 
#		by Ian Murdock <imurdock@gnu.ai.mit.edu>.
#
# Version:	@(#)skeleton  1.9  26-Feb-2001  miquels@cistron.nl
#


PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DESC="mongrel servers"
NAME=mongrel
DAEMON=/usr/bin/mongrel_rails
SCRIPTNAME=/etc/init.d/$NAME

test -x $DAEMON || exit 0

# configuration 
# don't change here, override in /etc/default/mongrel instead
USER=www-data
CONFIG_BASE=/etc/mongrel/sites-enabled
PEN=/usr/bin/pen

# Read config file if it is present.
if [ -r /etc/default/mongrel ]
then
  . /etc/default/mongrel
fi

set -e


# run the given command ($2, {start|stop|reload}) for the given app ($1)
for_app() {
  echo -n $1
  # reset optional args
  additional_pen_opts=
  pen_status_file=
  . $CONFIG_BASE/$1
  if [ $2 != 'reload' ]; then
    start_stop_proxy $1 $2
  fi
  DAEMON_OPTS="start -e ${environment} -a 127.0.0.1 -c $dir"
	if [ ! -z "$prefix" ]; then
		DAEMON_OPTS="$DAEMON_OPTS --prefix=$prefix"
	fi
  last_port=$(( $port + $servers - 1 ))
  case "$2" in
    start|reload)
      for p in `seq $port $last_port`; do
        pidfile="/var/run/$NAME.$1.$p.pid"
        case "$2" in
          start)
            start-stop-daemon --start --background --chuid $USER --make-pidfile --pidfile $pidfile --exec $DAEMON -- $DAEMON_OPTS -p $p
          ;;
          reload)
            SIGUSR2=12
            start-stop-daemon --stop --signal $SIGUSR2 --quiet --pidfile $pidfile  || echo "couldn't reload process $pidfile"
          ;;
        esac
      done
      ;;
    stop)
      for pidfile in `ls /var/run/$NAME.$1.*.pid`; do
        (start-stop-daemon --stop --quiet --pidfile $pidfile || kill -9 `cat $pidfile` || echo "couldn't kill process $pidfile (`cat $pidfile`), removing pid file anyway") && rm -f $pidfile
      done
      ;;
  esac
  echo "."
}

# run the given command ('stop' or 'start') for each app configured
# in /etc/mongrel_cluster
each_app() {
  for app in `ls $CONFIG_BASE/`; do
    for_app $app $1
  done
}

# runs given command ($1) for the given app ($2) or all apps, 
# if $2 is not given
run_command() {
  if [ "x$2" = "x" ]
  then
    # no site given
    each_app $1
  else
    for_app $2 $1
  fi
}

# start/stop the pen proxy for a given application:
#
# start_stop_proxy myapp start
#
# pen will be running as user nobody
start_stop_proxy() {
  if [ ! -x $PEN ]; then
    echo "pen not available, skipping proxy"
    return
  fi
  if [ "x$proxy_port" = "x" ]; then
    return
  fi
  pidfile="/var/run/pen.$proxy_port.pid"

  case "$2" in
    start)
      PEN_OPTS="$additional_pen_opts -fr $proxy_port "
      if [ "x$pen_status_file" != "x" ]; then
        PEN_OPTS="-w $dir/public/$pen_status_file $PEN_OPTS"
      fi
      last_port=$(( $port + $servers - 1 ))
      for p in `seq $port $last_port`; do
        PEN_OPTS="$PEN_OPTS localhost:$p"
      done
      start-stop-daemon --start --quiet --pidfile $pidfile --chuid nobody --background --make-pidfile --exec $PEN -- $PEN_OPTS || echo "couldnt start pen"
      ;;
    stop)
      if [ -f $pidfile ]; then
        start-stop-daemon --stop --quiet --oknodo --pidfile $pidfile 
      fi
      ;;
  esac
}


case "$1" in
  start)
  echo "Starting $DESC: $NAME"
  run_command 'start' $2
  echo "."
  ;;
  stop)
  echo "Stopping $DESC: $NAME"
  run_command 'stop' $2  
  echo "."
  ;;
  reload)
  echo "Reloading $DESC: $NAME"
  run_command 'reload' $2  
  echo "."
  ;;
  restart|force-reload)
  #
  #  If the "reload" option is implemented, move the "force-reload"
  #  option to the "reload" entry above. If not, "force-reload" is
  #  just the same as "restart".
  #
  echo "Restarting $DESC: $NAME"
  run_command 'stop' $2
  sleep 1
  run_command 'start' $2
  echo "."
  ;;
  *)
  # echo "Usage: $SCRIPTNAME {start|stop|reload|restart}" >&2
  echo "Usage: $SCRIPTNAME {start|stop|reload|restart}" >&2
  exit 1
  ;;
esac

exit 0