Shell脚本实现监视指定进程的运行状态

#!/bin/sh
echo "`date`"
echo "Start $0---------"
echo ""
#每十秒监视一下
sec=10
#取得指定进程名为mainAPP，内存的使用率，进程运行状态，进程名称
eval $(ps | grep "mainApp" | grep -v grep | awk {'printf("memInfo=%s;myStatus=%s;pName=%s",$3,$4,$5)'})
echo $pName $myStatus $memInfo
testPrg=""
while [ -n "$pName" -a "$myStatus" != "Z" ]
do
    echo "----------`date`---------------------"
    echo $pName $myStatus $memInfo
    sleep $sec
    ####You must initialize them again!!!!!
    pName=""
    myStatus=""
    memInfo=""
    eval $(ps | grep "mainApp" | grep -v grep | awk {'printf("memInfo=%s;myStatus=%s;pName=%s",$3,$4,$5)'})
    testPrg=`ps | grep "MyTester" | grep -v grep | awk '{print $0}'`
    if [ -z "$testPrg" ]; then
        break
    fi
    ##注意一定要再次初始化为空
    testPrg=""
done
echo "End $0---($pName,$myStatus,$testPrg)-------------------"
if [ -z "$pName" ]; then
        ###发现测被测试程序异常退出后，停止测试程序
    killall MyTester
    echo "stop TestProgram MyTester"
fi
echo "`date`"
echo "---------------Current Status------------------"
ps | grep -E "mainApp|SubApp" | grep -v grep
echo ""