shell的守护进程

#! /bin/bash

#########查找是否已启动test.sh脚本################

send=$(ps -ef | grep "BJOttData.sh" | grep -v grep | wc -l)

echo ${send}

zero=0

########若没有启动就开启，若启动就不重新启动####

if [ ${send} == ${zero} ]

then

   echo "Start process"

   cd /var/ftp

   ./BJOttData.sh

else

   echo "Exit process"

   exit 1

fi