linux shell 守护进程

守护进程，程序意外退出，重新启动

#! /bin/sh

#进程名字
PRO_NAME=/usr/hello

# ps aux | grep /usr/hello | grep -v grep |wc -l

while true ; do
	# 用ps获取$PRO_NAME进程数量
	# NUM=`ps aux | grep ${PRO_NAME} | grep -v grep |wc -l`
	PIDNUM=`ps | grep ${
     
     PRO_NAME} | grep -v grep |wc -l`
	# echo $PIDNUM
	# 少于1，重启进程
	if [ "${PIDNUM}" -lt "1" ];then
		echo "${PRO_NAME} restart"
		${PRO_NAME} 
	# 大于1，杀掉所有进程，重启
	elif [ "${PIDNUM}" -gt "1" ];then
		echo "more pid ${PIDNUM},killall ${PRO_NAME}"
		killall -9 $PRO_NAME
		${PRO_NAME}
	fi
	# kill僵尸进程
	NUM_STAT=`ps | grep ${
     
     PRO_NAME} | grep T | grep -v grep | wc -l`
	if [ "${NUM_STAT}" -gt "0" ];then
		killall -9 ${PRO_NAME}
		${PRO_NAME} 
	fi
	sleep 10
done
exit 0

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