linux自动重起服务，并发送邮件通知结果

#! /bin/bash
PATH=/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/app/service/bin:/app/service/bin:/usr/local/java/jdk1.6.0_20/bin:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/app/service/bin
DATETIME=`date +%F`
serpath=/app/service/ser/bin
serlog=/app/service/serrestart.log
serdate=`date +%F.%T`
serip=`/sbin/ifconfig |grep 'inet addr'|grep 192 |awk -F: '{print $2}'|awk '{print $1}'`
seruser=`whoami`
#####mailsend
mailtitle="ser information $serdate $serip "
mailmessagefile=$HOME/mail.txt  #邮件信息内容
mailmessage= #邮件信息内容
#mailcatcher=[e-mail]
mailcatcher=[e-mail]  #邮件接收者
mailsender=[e-mail]         #邮件发送者
serPIDFILE=/app/service/ser/user-attributes-database.pid


#####
statusser()
{
        ps -ef |grep ser |grep java|grep -v grep |awk '{print $2}'
}
Uadrestart()
{
        cd $serpath
        echo ">>>>> $serdate :  当前目录 `pwd`"
        pidold=`statusser`
        echo ">>>>> $serdate :  Old PID NO. is <$pidold>"
        #./misctrl.sh stop
        kill -9 $pidold
        rm -v $serPIDFILE
        sleep 1
        ./misctrl.sh start
        pidnew=`statusser`
        echo ">>>>> $serdate :  New PID NO. is <$pidnew>"
}

Status(){
        if [ -f $serPIDFILE ]
        then
                if test -z $pidnew -o $pidnew = $pidold
                then
                        mailmessage='ser service restarted failure'
                        echo "$serdate :  $serip  $mailmessage" > $mailmessagefile
                        echo "$serdate :  Old PID NO. is <$pidold>" >> $mailmessagefile
                        echo "$serdate :  New PID NO. is <$pidnew>" >> $mailmessagefile
                        echo "$serdate :  restarted faild ==> $mailmessage"
                        isok=failure
                else
                        mailmessage='ser service restarted success'
                        echo "$serdate :  $serip  $mailmessage" > $mailmessagefile
                        echo "$serdate :  Old PID NO. is <$pidold>" >> $mailmessagefile
                        echo "$serdate :  New PID NO. is <$pidnew>" >> $mailmessagefile
                        echo "$serdate :  restarted ok ==> $mailmessage"
                        isok=success
fi
        else
                mailmessage='ser service restarted failure'
                echo "$serdate :  $serip  $mailmessage" > $mailmessagefile
                echo "$serdate :  Old PID NO. is <$pidold>" >> $mailmessagefile
                echo "$serdate :  New PID NO. is <$pidnew>" >> $mailmessagefile
                echo "$serdate :  restarted faild ==> $mailmessage"
                isok=failure
                exit 1
fi
}

MailSend()
{
        `which mail` -v -s "$mailtitle $isok" $mailcatcher -- -f $mailsender < $mailmessagefile
}

vim.mailrc()
{
        cp -v $HOME/.mailrc{,.bak$DATETIME-`echo $RANDOM`}
        echo 'set from=[e-mail] smtp=smtp.126.com' > $HOME/.mailrc
        echo 'set smtp-auth-user=[e-mail] smtp-auth-password=sender.com' >> $HOME/.mailrc
        echo 'set smtp-auth=login' >> $HOME/.mailrc
}
MAIL()
{
        if test -f $HOME/.mailrc
        then
                MailSend
        else
                echo ".mailrc文件不存在，将创建此文件"
                vim.mailrc
                MailSend
        fi
}
if [ $seruser == service ]
then
        echo ">>>>>$serdate : 开始执行重起服务"
        Uadrestart
        Status
        MAIL
        exit 0
else
        echo ">>>>>$serdate : 严重！！使用service 用户运行此脚本"
        exit 1
fi