#! /bin/bash
### BEGIN INIT INFO
# Provides:          memcached
# Required-Start:    $syslog
# Required-Stop:     $syslog
# Should-Start:        $local_fs
# Should-Stop:        $local_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description:    memcached - Memory caching daemon
# Description:        memcached - Memory caching daemon
### END INIT INFO

# Usage:
# cp /etc/memcached.conf /etc/memcached_server1.conf
# cp /etc/memcached.conf /etc/memcached_server2.conf
# start all instances:
# /etc/init.d/memcached start
# start one instance:
# /etc/init.d/memcached start server1
# stop all instances:
# /etc/init.d/memcached stop
# stop one instance:
# /etc/init.d/memcached stop server1
# There is no "status" command.

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/bin/memcached
DAEMONNAME=memcached
DAEMONBOOTSTRAP=/usr/share/memcached/scripts/start-memcached
DESC=memcached

test -x $DAEMON || exit 0
test -x $DAEMONBOOTSTRAP || exit 0

set -e

FILES=(/etc/memcached_*.conf)
# check for alternative config schema
if [ -r "${FILES[0]}" ]; then
  CONFIGS=()
  for FILE in "${FILES[@]}";
  do
    # remove prefix
    NAME=${FILE#/etc/}
    # remove suffix
    NAME=${NAME%.conf}

    # check optional second param
    if [ $# -ne 2 ];
    then
      # add to config array
      CONFIGS+=($NAME)
    elif [ "memcached_$2" == "$NAME" ];
    then
      # use only one memcached
      CONFIGS=($NAME)
      break;
    fi;
  done;

  if [ ${#CONFIGS[@]} == 0 ];
  then
    echo "Config not exist for: $2" >&2
    exit 1
  fi;
else
  CONFIGS=(memcached)
fi;

CONFIG_NUM=${#CONFIGS[@]}
for ((i=0; i < $CONFIG_NUM; i++)); do
  NAME=${CONFIGS[${i}]}
  PIDFILE="/var/run/${NAME}.pid"

case "$1" in
    start)
        echo -n "Starting $DESC: "
        start-stop-daemon --start --quiet --exec "$DAEMONBOOTSTRAP" -- /etc/${NAME}.conf $PIDFILE
        echo "$NAME."
        ;;
    stop)
        echo -n "Stopping $DESC: "
        start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE --exec $DAEMON
        echo "$NAME."
        rm -f $PIDFILE
        ;;
    status)
        [ $# -lt 2 ] && NAME=$DAEMONNAME
        PIDFILE="/var/run/$NAME.pid"
        set +e
        start-stop-daemon --status --pidfile $PIDFILE
        case $? in
            0) echo "$DESC: $NAME (pid $(cat $PIDFILE)) is running" && exit 0;;
            1) echo "$DESC: $NAME is not running thro' the pid file exists" && rm -f $PIDFILE && exit 1;;
            3) echo "$DESC: $NAME is not running" && exit 3;;
            4) echo "$DESC: $NAME status is unclear, sorry" && exit 4;;
        esac
        ;;
    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 -n "Restarting $DESC: "
        start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE
        rm -f $PIDFILE
        sleep 1
        start-stop-daemon --start --quiet --exec "$DAEMONBOOTSTRAP" -- /etc/${NAME}.conf $PIDFILE
        echo "$NAME."
        ;;
    *)
        N=/etc/init.d/$NAME
    # echo "Usage: $N {start|stop|restart|reload|force-reload}" >&2
        echo "Usage: $N {start|stop|status|restart|force-reload}" >&2
        exit 1
        ;;
esac
done;

exit 0
