这篇文章主要介绍了Shell脚本传递参数的3种方法比较,本文直接给出代码示例,在代码中包含详细注解,需要的朋友可以参考下

#!/bin/bash

#extracting command text_text_text_line options as parameters

help_info(){

echo "NAME"

echo "\t$0"

echo "SYNOPSIS"

echo "\t$0 is a shell test about process options"

echo "DESCRIPTION"

echo "\toption like -a -b param1 -c param2 -d"

}

if [ $# -lt 0 ]

then

help_info

fi

nomal_opts_act()

{

echo -e "\n### nomal_opts_act ###\n"

while [ -n "$1" ]

do

case "$1" in

-a)

echo "Found the -a option"

;;

-b)

echo "Found the -b option"

echo "The parameter follow -b is $2"

shift

;;

-c)

echo "Found the -c option"

echo "The parameter follow -c is $2"

shift

;;

-d)

echo "Found the -d option"

;;

*)

echo "$1 is not an option"

;;

esac

shift

done

}

#用shell命令自建的选项解析，可以按照自己的想法实现

#优点：自己定制，没有做不到，只有想不到

#缺点：麻烦

getopt_act()

{

echo -e "\n### getopt_act ###\n"

GETOPTOUT=`getopt ab:c:d "$@"`

set -- $GETOPTOUT

while [ -n "$1" ]

do

case $1 in

-a)

echo "Found the -a option"

;;

-b)

echo "Found the -b option"

echo "The parameter follow -b is "$2""

shift

;;

-c)

echo "Found the -c option"

echo "The parameter follow -c is "$2""

shift

;;

-d)

echo "Found the -d option"

;;

--)

shift

break

;;

*)

echo "Unknow option: "$1""

;;

esac

shift

done

param_index=1

for param in "$@"

do

echo "Parameter $param_index:$param"

param_index=$[ $param_index + 1 ]

done

}

#用getopt命令解析选项和参数

#优点：相对与getopts来说是个半自动解析，自动组织选项和参数，用 -- 符号将选项与参数隔开

#缺点：相对于getopts的缺点

#1.需要与set -- 命令配合，不是必须，需要手动shift

#2.选项参数中不支持空格如 -a -b dog -c "earth moon" -d -f param1 param2 就会解析错误

getopts_act()

{

echo -e "\n### getopts_act ###\n"

while getopts :ab:c:d ARGS

do

case $ARGS in

a)

echo "Found the -a option"

;;

b)

echo "Found the -b option"

echo "The parameter follow -b is $OPTARG"

;;

c)

echo "Found the -c option"

echo "The parameter follow -c is $OPTARG"

;;

d)

echo "Found the -d option"

;;

*)

echo "Unknow option: $ARGS"

;;

esac

done

shift $[ $OPTIND -1 ]

param_index=1

for param in "$@"

do

echo "Parameter $param_index:$param"

param_index=$[ $param_index + 1 ]

done

}

#getopts 命令解析选项和参数

#优点：可在参数中包含空格如：-c "earth moon"

# 选项字母和参数值之间可以没有空格如：-bdog

# 可将未定义的选项绑定到?输出

# Unknow option: ?

nomal_opts_act -a -b dog -c earth -d -f param1 param2

getopts_act -a -b dog -c "earth moon" -d -f param1 param2

getopt_act -a -b dog -c earth -d -f param1 param2

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