关于程序时间控制那点事情

 

#!/bin/bash


#自动下载自动开启关闭脚本
#定义开始时间,000101表示00:01:01
datestart=000101
#定义结束时间,180101表示18:01:01
dateend=180101
#自动和网络时间同步，避免时间故障
sntp -P no -r pool.ntp.org
#获取当前系统的时区
zone=`awk /TZif2/ /etc/localtime |cut -c1-5`
zone="TZif2"
[ $zone != 0 ];rm /etc/localtime;
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
#获取当前系统时间
date=`date --date=-24hour +%H%M%S`
#查看当前进程是否运行
downloader=`ps -ef |grep "/home/downloader/downloader" |grep -v grep|awk '{print $8}'|cut -c22-31|uniq`
#判断时间是否为下载时间，是，则进行下载
if [ $downloader = "downloader" ]
then exit 1
  elif  [  $date -ge $datestart -a $date -lt $dateend  ]
then `nohup /home/downloader/downloader > /dev/null &`;status=$?
   [ $status = 0  ] && echo "***********Now is $date,start downloader***********************" >>/var/log/start_downloader.log
   [ $status != 0  ] && echo "**********Now is $date,start downloader,but can't find the program" >>/var/log/start_downloader
.log

elif [ $date -gt $dateend ]
then `ps -ef |grep down|grep -v grep|awk '{print $2}'|xargs kill -9`;status=$?
   [ $status != 0  ] && echo "***********Now is $date,the program is not running,stop error**************"  >>/var/log/stop_d
ownloader.log
   [ $status = 0  ] && echo "***********Now is $date,killed downloader*****************" >>/var/log/stop_downloader.log


#elif [ $down != 0 ] && [ $date -le $dateend ]
#then `nohup /home/downloader/downloader > /dev/null &`
#echo "*********Now is $date,the process is not running,started it" >>/var/log/start_downloader.log
else
echo "*********no such a file,please check the process url">>/var/log/start_downloader.log
fi
exit 1
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