shell 命令行选项处理方法 getopts

一个完善的shell脚本应该能处理行如 -option 的命令行选项，bash 有一个内置的命令 getopts 可用来处理命令行选项

 

示例，用法 getopts.h -x -y YARG -z ZARG *

 

bbkf:/yzyfb/report/cdq/bash$cat getopts.sh
#!/bin/bash
# getopts.sh - Using getopts
##############################

while getopts xy:z: opt;
do
        case $opt in
                x) xopt='-x set';;
                y) yopt="-y set and called with $OPTARG" ;;
                z) zopt="-z set and called with $OPTARG" ;;
                \?) echo 'USAGE: getopts.sh [-x] [-y arg] [-z arg] file ...'
                   exit 1
        esac
done

shift $(($OPTIND - 1 ))

echo ${xopt:-'did not use -x'}
echo ${yopt:-'did not use -y'}
echo ${zopt:-'did not use -z'}

echo "Remaining command-line arguments are:"
for f in "$@"
do
        echo "\t$f"
done