#!/bin/sh

function init_multi_mode()
{
   ACTION=$1
   CONFIG=$2
   ERROR=0

   if [ -z $ACTION ]
   then
      echo "Usage: $0 {start|stop|status|restart} [CONFIGURATION_NAME]"
      exit 3
   fi

   if [ -z $CONFIG ]
   then
      for CONFIG_FOLDER in $( ls -d /etc/beegfs/*.d )
      do
         if [ -r ${CONFIG_FOLDER}/${SERVICE_NAME}.conf ]
         then
            CONFIG=$( basename $CONFIG_FOLDER .d )
            init_multi_mode_single_configuration $ACTION $CONFIG

            if [ $? -ne 0 ]
            then
               ERROR=1
            fi
         fi
      done
   else
      if [ -e "/etc/beegfs/${CONFIG}.d" ]
      then
         init_multi_mode_single_configuration $ACTION $CONFIG
         ERROR=$?
      else
         echo "Configuration folder /etc/beegfs/${CONFIG}.d doesn't exist."
         ERROR=1
      fi
   fi
   return $ERROR
}

function init_multi_mode_single_configuration()
{
   ACTION=$1
   CONFIG=$2

   if [ -z $ACTION ]
   then
      echo "Usage: $0 {start|stop|status|restart} [CONFIGURATION_NAME]"
      exit 3
   fi

   # Check for existence of needed config file and read it
   APP_CONFIG=/etc/beegfs/${CONFIG}.d/${SERVICE_NAME}.conf
   test -r $APP_CONFIG || { echo "$APP_CONFIG not existing";
      if [ "$1" = "stop" ]; then exit 0;
      else exit 6; fi; }

   PIDFILE=/var/run/${SERVICE_NAME}-${CONFIG}.pid
   DAEMON_ARGS="cfgFile=${APP_CONFIG} pidFile=$PIDFILE"

   RETVAL=0
   # Return values acc. to LSB for all commands but status:
   # 0	  - success
   # 1       - generic or unspecified error
   # 2       - invalid or excess argument(s)
   # 3       - unimplemented feature (e.g. "reload")
   # 4       - user had insufficient privileges
   # 5       - program is not installed
   # 6       - program is not configured
   # 7       - program is not running
   # 8--199  - reserved (8--99 LSB, 100--149 distrib, 150--199 appl)
   # 
   # Note that starting an already running service, stopping
   # or restarting a not-running service as well as the restart
   # with force-reload (in case signaling is not supported) are
   # considered a success.

   case "$ACTION" in
      start)
         if [ -f "${SYSCONFIG_FILE}" ]; then
            if [ "${START_SERVICE}" = "NO" -o "${START_SERVICE}" = "no" ]; then
               echo "${APP_NAME} not set to be started"
               exit 0
            fi
         fi

         echo -n "Starting ${APP_NAME} (${CONFIG}): "
         ## create subfolder for lock files, on Debian systems needed
         mkdir -p /var/lock/subsys

         ## Start daemon with startproc(8). If this fails
         ## the return value is set appropriately by startproc.
         daemon --pidfile $PIDFILE $APP_BIN $DAEMON_ARGS \
            && touch /var/lock/subsys/${SERVICE_NAME}-${CONFIG}
         RETVAL=$?

         if [ ! -e /var/lock/subsys/${SERVICE_NAME} ]
         then
            touch /var/lock/subsys/${SERVICE_NAME}
         fi
         echo
         ;;
      stop)
         echo -n "Shutting down ${APP_NAME} (${CONFIG}): "
         ## Stop daemon with killproc(8) and if this fails
         ## killproc sets the return value according to LSB.

         killproc -p $PIDFILE $APP_BIN && rm -f /var/lock/subsys/${SERVICE_NAME}-${CONFIG}
         RETVAL=$?

         count=$(find /var/lock/subsys/ -name ${SERVICE_NAME}-* | wc -l)
         if [ $count -eq 0 ]
         then
            rm -f /var/lock/subsys/${SERVICE_NAME}
         fi
         echo
         ;;
      restart)
         ## Stop the service and regardless of whether it was
         ## running or not, start it again.
         $0 stop $CONFIG
         $0 start $CONFIG
         RETVAL=$?
         # Remember status and be quiet
         ;;
      status)
         echo -n "Checking for service ${APP_NAME} (${CONFIG}): "
         ## Check status with checkproc(8), if process is running
         ## checkproc will return with exit status 0.

         # Return value is slightly different for the status command:
         # 0 - service up and running
         # 1 - service dead, but /var/run/  pid  file exists
         # 2 - service dead, but /var/lock/ lock file exists
         # 3 - service not running (unused)
         # 4 - service status unknown :-(
         # 5--199 reserved (5--99 LSB, 100--149 distro, 150--199 appl.)

         status_multi -p $PIDFILE $APP_BIN
         RETVAL=$?
         echo
         ;;
      *)
         echo "Usage: $0 {start|stop|status|restart} [CONFIGURATION_NAME]"
         exit 3
         ;;
      esac
   return $RETVAL
}