兄弟连 企业shell笔试题 16-31

企业实践题16：
企业案例:写网络服务独立进程模式下rsync的系统启动脚本

例如：/etc/init.d/rsyncd{start|stop|restart} 。
要求：
1.要使用系统函数库技巧。
2.要用函数，不能一坨SHI的方式。
3.可被chkconfig管理。

脚本1：自己写的

 

#!/bin/bash

pidfile="/var/run/rsyncd.pid"
result=`ps aux|grep  'rsync --daemon --config=*'|grep -v grep`

Rstatus(){
if [ "$result"X = X ];then
 echo "rsyncd is not running !"
else
 echo "rsyncd is running"
fi
}


Rstart(){
if [ "$result"X == X ];then
 /usr/bin/rsync --daemon --config=/etc/rsyncd/rsyncd.conf
 echo "rsync service start.......OK"
else
 echo "rsyncd is running"
fi
}

Rstop(){
if [ "$result"X == X ];then
   echo "rsync service is down !"
   exit 1
else
 kill -9 $(cat $pidfile)
 Rstatus2=`ps aux|grep  'rsync --daemon --config=*'|grep -v grep`
 if [ "$Rstatus2"X = X ];then
   rm -f $pidfile
   echo "rsync service stop.......OK"
 fi
fi
}


Rrestart(){
if [ "$result"X != X ];then
 Rstop
 /usr/bin/rsync --daemon --config=/etc/rsyncd/rsyncd.conf
 echo "rsync service start.......OK"
else
 echo "rsync service is down !"
fi
}

case $1 in
"start" )
 Rstart
;;
"stop" )
 Rstop
;;
"restart" )
 Rrestart
;;
"status" )
 Rstatus
;;
* )
echo "argument is start|stop|status|restart"
;;
esac

 

脚本2：网上找的

#!/bin/bash 
#this script for start|stop rsync daemon service 

status1=$(ps -ef | egrep "rsync --daemon.*rsyncd.conf" | grep -v 'grep') 
pidfile="/var/run/rsyncd.pid" 
start_rsync="rsync --daemon --config=/etc/rsyncd/rsyncd.conf" 
  
                    #start rsync
function rsyncstart() { 
    if [ "${status1}X" == "X" ];then 
        rm -f $pidfile       
        ${start_rsync}   
        status2=$(ps -ef | egrep "rsync --daemon.*rsyncd.conf" | grep -v 'grep') 
        if [  "${status2}X" != "X"  ];then
            echo "rsync service start.......OK"     
        fi 
    else 
        echo "rsync service is running !"    
    fi 
} 
  
 
                  #stop rsync
function rsyncstop() { 
    if [ "${status1}X" != "X" ];then 
        kill -9 $(cat $pidfile)                               #读取并结束 进程 pid号
        status2=$(ps -ef | egrep "rsync --daemon.*rsyncd.conf" | grep -v 'grep') 
        if [ "${statusw2}X" == "X" ];then 
            echo "rsync service stop.......OK" 
        fi 
    else 
        echo "rsync service is not running !"    
    fi 
} 
  
              #status 
function rsyncstatus() { 
    if [ "${status1}X" != "X" ];then 
        echo "rsync service is running !"   
    else
         echo "rsync service is not running !"  
    fi 
} 
           #restart
function rsyncrestart() { 
    if [ "${status1}X" == "X" ];then 
               echo "rsync service is not running..." 
               rsyncstart 
        else 
               rsyncstop 
               rsyncstart    
        fi       
}  
  
case $1 in 
        "start") 
               rsyncstart 
                ;; 
  
        "stop") 
               rsyncstop 
                ;; 
  
        "status") 
               rsyncstatus 
               ;; 
  
        "restart") 
               rsyncrestart 
               ;; 
  
        *) 
          echo 
                echo  "Usage: $0 start|stop|restart|status" 
          echo 
esac
 

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