Linux shell编程 拷贝大文件之显示进度条_shell显示复制的进度

    echo 'Ctrl+C is captured,拷贝已停止'
    exit 1

}

isalive(){
out=ps -p $1 2> /dev/null
return $?
}

while 2>1; do
{ SSIZE=/bin/ls -l $SOURCE | gawk "{print \\\$5}"
if [ -f $TARGET ]; then
TSIZE=/bin/ls -l $TARGET | gawk "{print \\\$5}"
else
TSIZE=“0”
fi
PERCENT=echo "scale=2; $TSIZE/$SSIZE*100" | bc -l
RATE=echo "scale=0; 63*$PERCENT/100" | bc -l
BLUE=“\033[3;44m”
NORMAIL=“\033[0;39m”

    BAR=$BLUE
    i=0
    while [ $i -le 62 ]; do
            [ $i = $RATE ] && BAR=$BAR"\\033[7;39m"
            BAR=$BAR" "
            let i=$i+1
    done
    BAR=$BAR$NORMAIL
    echo -en "\r$BAR ${PERCENT}%"
    if ! isalive "$CPID"; then echo -en "\n"; exit; fi
    sleep 1

}
done

**脚本运行效果：**

[root@centos61 ~]# bash copyfile.sh Demofile Demofile-bak
14.00%^C
Ctrl+C is captured,拷贝已停止

![](https://img-blog.csdnimg.cn/68a806a290824530a9589852d882463f.png)


**此时到百分之14的时候按ctrl+c停止了，我们可以核对一下目标文件是否是源文件的百分之14：**


**可以计算出1.5除以9.8确实是百分之14**

[root@centos61 ~]# ls -alh Demofile*
-rw-r–r–. 1 root root 9.8G May 27 17:41 Demofile
-rw-r–r–. 1 root root 1.5G May 27 18:25 Demofile-bak

 **shell脚本完美运行！！！！！！**


**完整运行：**

[root@centos61 ~]# time bash copyfile.sh Demofile Demofile-bak
100.00%

real 2m6.804s
user 0m1.769s
sys 0m22.517s

[root@centos61 ~]# ls -al Demofile*
-rw-r–r–. 1 root root 10485760000 May 27 17:41 Demofile
-rw-r–r–. 1 root root 10485760000 May 27 18:36 Demofile-bak

![](https://img-blog.csdnimg.cn/6e0bba7228ad4a87b2f5fd7b4e37bc9c.png) 


### 


### **三，**


### **脚本说明：**


* **$1 代表源文件，本例是Demofile，$2 代表目标文件，本例是Demofile-bak**
* **实际的拷贝命令是在后台运行，因为前台需要显示的是进度条，因此是****$CP "$SOURCE" "$TARGET" &**



> 
> **trap "onCtrlC" INT  
>  function onCtrlC () {  
>          #捕获CTRL+C，当脚本被ctrl+c的形式终止时同时终止程序的后台进程  
>          kill -9 ${isalive} ${CPID}  
>          echo  
>          echo 'Ctrl+C is captured,拷贝已停止'  
>          exit 1  
>  }**  
>   
> 
> 
> 


**这一块是抓取中断信号，如果不想拷贝了的情况下，ctrl+c停止脚本，这样会使得脚本退出更为优雅。**



> 
> **isalive(){  
>          out=`ps -p $1 2> /dev/null`  
>          return $?  
>  }**  
>   
> 
> 
> 


**这一块是监听拷贝程序的 pid，当返回值为1的时候，表示拷贝完成，程序停止退出。**


**一个循环的debug如下：**

++ ps -p 35785

• out=’ PID TTY TIME CMD
  35785 pts/1 00:00:15 cp’
• return 0
• sleep 1
  ++ /bin/ls -l Demofile
  ++ gawk ‘{print $5}’
• SSIZE=10485760000
• ‘[’ -f Demofile-bak ‘]’
  ++ /bin/ls -l Demofile-bak
  ++ gawk ‘{print $5}’
• TSIZE=10337685504
  ++ echo ‘scale=2; 10337685504/10485760000*100’
  ++ bc -l
• PERCENT=98.00
  ++ echo ‘scale=0; 63*98.00/100’
  ++ bc -l
• RATE=61
• BLUE=‘\033[3;44m’
• NORMAIL=‘\033[0;39m’
• BAR=‘\033[3;44m’
• i=0
• ‘[’ 0 -le 62 ‘]’
• ‘[’ 0 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=0+1
• ‘[’ 1 -le 62 ‘]’
• ‘[’ 1 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=1+1
• ‘[’ 2 -le 62 ‘]’
• ‘[’ 2 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=2+1
• ‘[’ 3 -le 62 ‘]’
• ‘[’ 3 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=3+1
• ‘[’ 4 -le 62 ‘]’
• ‘[’ 4 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=4+1
• ‘[’ 5 -le 62 ‘]’
• ‘[’ 5 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=5+1
• ‘[’ 6 -le 62 ‘]’
• ‘[’ 6 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=6+1
• ‘[’ 7 -le 62 ‘]’
• ‘[’ 7 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=7+1
• ‘[’ 8 -le 62 ‘]’
• ‘[’ 8 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=8+1
• ‘[’ 9 -le 62 ‘]’
• ‘[’ 9 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=9+1
• ‘[’ 10 -le 62 ‘]’
• ‘[’ 10 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=10+1
• ‘[’ 11 -le 62 ‘]’
• ‘[’ 11 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=11+1
• ‘[’ 12 -le 62 ‘]’
• ‘[’ 12 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=12+1
• ‘[’ 13 -le 62 ‘]’
• ‘[’ 13 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=13+1
• ‘[’ 14 -le 62 ‘]’
• ‘[’ 14 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=14+1
• ‘[’ 15 -le 62 ‘]’
• ‘[’ 15 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=15+1
• ‘[’ 16 -le 62 ‘]’
• ‘[’ 16 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=16+1
• ‘[’ 17 -le 62 ‘]’
• ‘[’ 17 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=17+1
• ‘[’ 18 -le 62 ‘]’
• ‘[’ 18 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=18+1
• ‘[’ 19 -le 62 ‘]’
• ‘[’ 19 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=19+1
• ‘[’ 20 -le 62 ‘]’
• ‘[’ 20 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=20+1
• ‘[’ 21 -le 62 ‘]’
• ‘[’ 21 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=21+1
• ‘[’ 22 -le 62 ‘]’
• ‘[’ 22 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=22+1
• ‘[’ 23 -le 62 ‘]’
• ‘[’ 23 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=23+1
• ‘[’ 24 -le 62 ‘]’
• ‘[’ 24 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=24+1
• ‘[’ 25 -le 62 ‘]’
• ‘[’ 25 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=25+1
• ‘[’ 26 -le 62 ‘]’
• ‘[’ 26 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=26+1
• ‘[’ 27 -le 62 ‘]’
• ‘[’ 27 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=27+1
• ‘[’ 28 -le 62 ‘]’
• ‘[’ 28 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=28+1
• ‘[’ 29 -le 62 ‘]’
• ‘[’ 29 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=29+1
• ‘[’ 30 -le 62 ‘]’
• ‘[’ 30 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=30+1
• ‘[’ 31 -le 62 ‘]’
• ‘[’ 31 = 61 ‘]’
• BAR='\033[3;44m ’
• let i=31+1
• ‘[’ 32 -le 62 ‘]’

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加入社区》https://bbs.youkuaiyun.com/forums/4304bb5a486d4c3ab8389e65ecb71ac0
in有什么区别，工作中你怎么选择?

8、什么是中间件?什么是jdk?

9、讲述一下Tomcat8005、8009、8080三个端口的含义？

10、什么叫CDN?

11、什么叫网站灰度发布?

12、简述DNS进行域名解析的过程?

13、RabbitMQ是什么东西?

14、讲一下Keepalived的工作原理?

15、讲述一下LVS三种模式的工作过程?

16、mysql的innodb如何定位锁问题，mysql如何减少主从复制延迟?

17、如何重置mysql root密码?
加入社区》https://bbs.youkuaiyun.com/forums/4304bb5a486d4c3ab8389e65ecb71ac0