嵌入式成长轨迹10 【嵌入式环境及基础】【Linux shell强化】【脚本参数传递】...

 

一、shift命令
每次将参数位置向左偏移n位

 1 #!/bin/bash
 2 #shift use
 3 
 4 function use()
 5 {
 6         echo "Hello now i am $0! "
 7         return 0
 8 }
 9 totalline=0;
10 if [ $# -lt 2 ];then
11         use
12         exit
13 fi
14 
15 while [ $# -ne 0 ]
16 do
17         line=`cat $1 |wc -l`
18         echo "$l : $line"
19         totalline=$[ $totalline+$line ]
20         shift
21 done
22 echo "----------------"
23 echo "total:$totalline"

 

二、getopts命令
获得多个命令行参数
输入-a -h -c ff试试~

 

 1 #!/bin/bash
 2 #getopts use
 3 
 4 ALL=false
 5 HELP=false
 6 FILE=false
 7 VERBOSE=false
 8 
 9 while getopts ahfvc: OPTION
10 do
11         case $OPTION in
12         a)
13                 ALL=true
14                 echo "ALL IS $ALL"
15                 ;;
16         h)
17                 HELP=true
18                 echo "HELP is $HELP"
19                 ;;
20         f)
21                 FILE=true
22                 echo "FILE IS $FILE"
23                 ;;
24         h)
25                 HELP=true
26                 echo "HELP is $HELP"
27                 ;;
28         f)
29                 FILE=true
30                 echo "FILE IS $FILE"
31                 ;;
32         v)
33                 VERBOSE=true
34                 echo "VERBOSE = $VERBOSE"
35                 ;;
36         c)
37                 c=$OPTARG
38                 echo "c value is $c"
39                 ;;
40         \?)
41                 echo "`basename $0` -[a h f v] -[c value]file"
42                 ;;
43         esac
44 done

 

 

 

 

终端

1 [root@localhost ~]# vi hellofun.sh
2 [root@localhost ~]# hellofun.sh -a -h -c ff
3 ALL IS true
4 HELP is true
5 c value is ff

 

 

转载于:https://www.cnblogs.com/zeedmood/archive/2012/03/06/2382475.html