linux守护进程脚本

#!/bin/sh
PRO_NAME=proname
WLAN=ra0

while true ; do

#用ps获取$PRO_NAME进程数量
NUM=`ps aux | grep ${PRO_NAME} | grep -v grep |wc -l`

#进程数目少于1，重启进程
if [ "${NUM}" -lt "1" ];then
echo "${PRO_NAME} was killed"
${PRO_NAME} -i ${WLAN}
#进程数目大于1，杀掉该服务的所有进程，重启进程
elif [ "${NUM}" -gt "1" ];then
echo "more than 1 ${PRO_NAME},killall ${PRO_NAME}"
killall -9 $PRO_NAME
${PRO_NAME} -i ${WLAN}
fi
#kill掉僵尸进程
NUM_STAT=`ps aux | grep ${PRO_NAME} | grep T | grep -v grep | wc -l`
if [ "${NUM_STAT}" -gt "0" ];then
killall -9 ${PRO_NAME}
${PRO_NAME} -i ${WLAN}
fi
done

#结束退出
exit 0