shell脚本函数实现以及如何传递带空格的参数

function check(){

  #check if container is running
  count=`docker ps | grep $1 | grep -v "grep" |wc -l`
  if [ 0 == $count ];then
    docker start $1
    docker exec $1 `echo ${@:7}`
  fi

  #check if service is running
  count=`docker exec $1 ps -ax | grep $3 | grep -v "grep" |wc -l`
  if [ 0 == $count ];then
    docker exec $1 `echo ${@:7}`
  fi
}
#memcache
memcacheCommand="service mmecached start"
check memcache $memcacheCommand memcached