shell守护脚本

2015/10/17 42560

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#! /bin/sh
#进程名字可修改
PRO_NAME=udhcpc
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`
#   echo $NUM
#       少于1，重启进程
    if [ "${NUM}" -lt "1" ];then
        echo "${PRO_NAME} was killed"
        ${PRO_NAME} -i ${WLAN}
#       大于1，杀掉所有进程，重启
    elif [ "${NUM}" -gt "1" ];then
        echo "more than 1 ${PRO_NAME},killall ${PRO_NAME}"
        killall -9 $PRO_NAME
        ${PRO_NAME} -i ${WLAN}
    fi
#       kill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
 
exit 0