#!/bin/sh
##
# pcsd Pacemaker & Corosync configuration daemon
#
# chkconfig:   - 21 81 
# description: Pacemaker & Corosync configuration daemon

### BEGIN INIT INFO
# Provides: pcsd
# Required-Start: $remote_fs $network $syslog
# Required-Stop: $remote_fs $network $syslog
# Should-Start: 
# Should-Stop: 
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Starts and stops Pacemaker & Corosync daemon
# Description: Starts and stops Pacemaker & Corosync daemon
### END INIT INFO

# PATH
PATH=/usr/sbin:/usr/bin:/sbin:/bin
DESC="pcs daemon"
NAME=pcsd
EXEC=ruby
SUB_EXEC=/usr/share/pcsd/ssl.rb
DAEMON_USER=root
DAEMON=/usr/bin/ruby
DAEMON_ARGS="-C/var/lib/pcsd -I/usr/share/pcsd -- /usr/share/pcsd/ssl.rb"
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME
LOGFILE=/var/log/$NAME/$NAME.log
SLEEP_DURATION=2

# Exit if ruby is not installed
[ -x $(which $EXEC) ] || echo "$EXEC was not found. Is it installed?"
[ -x $(which $SUB_EXEC) ] || echo "$SUB_EXEC not found. Is pcs installed?"

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

# Source lsb init functions
. /lib/lsb/init-functions

is_running()
{
  # Test whether pid file exists or not
  test -f $PIDFILE || return 1

  # Test whether process is running or not
  read PID < "$PIDFILE"
  ps -p $PID >/dev/null 2>&1 || return 1

  # Is running
  return 0
}

root_only()
{
  if [ "$(id -u)" != "0" ]; then
    echo "Only root should run this operation"
    exit 1
  fi
}

run()
{
  if is_running; then
    PID="$(cat $PIDFILE)"
    echo "Daemon is already running as PID $PID"
    return 1
  fi

  nohup $DAEMON $DAEMON_ARGS > /dev/null 2>&1 &
  echo $! > $PIDFILE
  read PID < "$PIDFILE"

  echo "PID is $PID"

  sleep $SLEEP_DURATION
  if ! is_running; then
    echo "Daemon died immediately after starting. Please check your logs and configurations."
    return 1
  fi

  echo "Daemon is running as PID $PID"
  return 0
}

stop()
{
  if is_running; then
    read PID < "$PIDFILE"
    kill -9 $PID
  fi

  sleep $SLEEP_DURATION
  if is_running; then
    while is_running; do
      echo "waiting for daemon to die (PID $PID)"
      sleep $SLEEP_DURATION
    done
  fi

  # Be sure to remove the pid file
  rm -f "$PIDFILE"
  return 0
}

case "$1" in
  start)
    root_only
    log_daemon_msg "Starting $DESC"  "$NAME"
    run
    log_end_msg $?
    ;;
  stop)
    root_only
    log_daemon_msg "Stopping $DESC" "$NAME"
    stop
    log_end_msg $?
    ;;
  restart|force-reload)
    log_daemon_msg "Restarting $DESC" "$NAME"
    root_only
    $0 stop && $0 start
    ;;
  status|monitor)
    status_of_proc \
      -p "$PIDFILE" \
      "$SUB_EXEC" \
      "$NAME" \
      && exit 0 \
      || exit $?
    ;;
  *)
    echo "Usage: $0 {start|stop|restart|reload|force-reload|status|monitor}"
    exit 1
  ;;
esac

:
