linux shell实现守护进程脚本

#! /bin/sh
PRO_NAME=./TEST

StartPro()
{
    ${PRO_NAME}  > /dev/null 2>&1 &
    date >> ./reboot.log
    echo ${PRO_NAME}" start..." >> ./reboot.log
}

while true; do
sleep 1
#用ps获取$PRO_NAME进程数量
PRO_NUM=`ps aux | grep ${PRO_NAME} | grep -v grep | wc -l`
#少于1，重启进程
  if [ "${PRO_NUM}" -lt "1" ] ; then
    echo "${PRO_NAME} was killed"
    StartPro
#大于1，杀掉所有进程，重启
  elif [ "${PRO_NUM}" -gt "1" ]; then
    echo "more than 1 ${PRO_NAME},killall ${PRO_NAME}"
    killall -9 ${PRO_NAME}
    sleep 2
    StartPro
  fi
#kill僵尸进程
  PRO_STAT=`ps aux | grep ${PRO_NAME} | grep T | grep -v grep | wc -l`
  if [ ${PRO_STAT} -gt 0 ] ; then
    killall -9 ${PRO_NAME}
    sleep 2
    StartPro
  fi
done
  
exit 0