爬虫停止代码

spiderPID=0
for spider in  spider141212Run spider141205Run spider141213Run spider141204Run
do  echo 'stop crawler' $spider $te;
ps=`ps -ef | grep $spider | grep -v grep`
if [ -n "$ps" ]; then
#echo  "PID" $ps
spiderPID=`echo $ps | awk '{print $2}'` ;
echo "spiderPID: " $spiderPID ;
kill $spiderPID
else
echo  $spider' stoped'
fi
done

ps -ef | grep $spider | grep -v grep

ps -ef | grep $spider | grep -v grep