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【笔记】Shell 获取命令行参数

 9 months ago
source link: https://loli.fj.cn/2023/08/16/Shell%E8%8E%B7%E5%8F%96%E5%91%BD%E4%BB%A4%E8%A1%8C%E5%8F%82%E6%95%B0/
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Shell 获取命令行参数

获取命令行参数

demo.sh -h 127.0.0.1 -p 80

获取 Shell 程序名

echo $0
demo.sh
echo $1
echo $2
-h
127.0.0.1

获取所有参数总数

echo $#
4

根据标识符获取参数

shift

while [ $# -gt 0 ];
do
   case $1 in
   -h) echo $2
       shift
       ;;
   -p) echo $2
       shift
       ;;
   esac
   shift
done
127.0.0.1
80

getopts

while getopts a:b:c: opt;
do
    case $opt in
    h) echo $OPTARG
       ;;
    p) echo $OPTARG
       ;;
    ?) echo "没有这个参数"
       ;;
esac
done

博客园 ——zk47


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