這篇文章主要介紹了Shell腳本傳遞參數(shù)的3種方法比較,本文直接給出代碼示例,在代碼中包含詳細注解,需要的朋友可以參考下
#!/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 "$1 is not an option"
;;
esac
shift
done
}
#用shell命令自建的選項解析，可以按照自己的想法實現(xiàn)
#優(yōu)點：自己定制，沒有做不到，只有想不到
#缺點：麻煩
getopt_act()
{
echo -e "\n### getopt_act ###\n"
GETOPTOUT=`getopt ab:c:d "$@"`
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命令解析選項和參數(shù)
#優(yōu)點：相對與getopts來說是個半自動解析，自動組織選項和參數(shù)，用 -- 符號將選項與參數(shù)隔開
#缺點：相對于getopts的缺點
#1.需要與set -- 命令配合，不是必須，需要手動shift
#2.選項參數(shù)中不支持空格如 -a -b dog -c "earth moon" -d -f param1 param2 就會解析錯誤
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 命令解析選項和參數(shù)
#優(yōu)點：可在參數(shù)中包含空格如：-c "earth moon"
# 選項字母和參數(shù)值之間可以沒有空格如：-bdog
# 可將未定義的選項綁定到?輸出
# 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