這篇文章主要介紹了Shell腳本傳參數(shù)方法總結(jié),本文著重講解傳遞固定個(gè)數(shù)參數(shù)的方法、可變個(gè)數(shù)參數(shù)的方法兩部份內(nèi)容,需要的朋友可以參考下
一、接收固定長(zhǎng)度的參數(shù)
代碼如下:
[root@svn shell_example]# cat params.sh
#!/bin/bash
#傳參測(cè)試腳本
echo "My name is `basename $0` -I was called as $0"
echo "My first parameter is : $1"
echo "My second parameter is : $2"
空參數(shù)執(zhí)行
代碼如下:
[root@svn shell_example]# sh params.sh
My name is params.sh -I was called as params.sh
My first parameter is :
My second parameter is :
傳遞2個(gè)參數(shù)執(zhí)行
代碼如下:
[root@svn shell_example]# sh params.sh one two
My name is params.sh -I was called as params.sh
My first parameter is : one
My second parameter is : two
二、那如果還有參數(shù)怎么辦呢?還要一個(gè)個(gè)加上來(lái)嗎?答案是否定的
以下用法應(yīng)該不陌生,就是直接執(zhí)行腳本本身,沒(méi)有附帶任何參數(shù),那么腳本講拋出幫助信息.即怎么使用此腳本.見(jiàn)紅字部分
代碼如下:
[root@svn shell_example]# sh params_v2.sh
My name is params_v2.sh -I was called as params_v2.sh
I was called with 0 parameters.
Usage: params_v2.sh first second
You provided 0 parameters,but 2 are required.
代碼如下
代碼如下:
[root@svn shell_example]# cat params_v2.sh
#!/bin/bash
# 這是個(gè)測(cè)試腳本傳參的測(cè)試?yán)?BR> echo "My name is `basename $0` -I was called as $0"
echo "I was called with $# parameters."
if [ "$#" -eq "2" ];then
echo "My first parameter is $1"
echo "My second parameter is $2"
else
echo "Usage: `basename $0` first second"
echo "You provided $# parameters,but 2 are required."
fi
詳細(xì)的執(zhí)行過(guò)程如下
不傳參數(shù)執(zhí)行
代碼如下:
[root@svn shell_example]# sh params_v2.sh
My name is params_v2.sh -I was called as params_v2.sh
I was called with 0 parameters.
Usage: params_v2.sh first second
You provided 0 parameters,but 2 are required.
傳遞3個(gè)參數(shù)執(zhí)行
代碼如下:
[root@svn shell_example]# sh params_v2.sh one two three
My name is params_v2.sh -I was called as params_v2.sh
I was called with 3 parameters.
Usage: params_v2.sh first second
You provided 3 parameters,but 2 are required.
傳遞2個(gè)參數(shù)執(zhí)行
代碼如下:
[root@svn shell_example]# sh params_v2.sh one two
My name is params_v2.sh -I was called as params_v2.sh
I was called with 2 parameters.
My first parameter is one
My second parameter is two
問(wèn)題來(lái)了,要是后期還要加參數(shù)怎么辦呢?或者我也不確定到底會(huì)傳幾個(gè)參數(shù).
解決方法如下,詳細(xì)執(zhí)行結(jié)果如下
代碼如下:
[root@svn shell_example]# cat manyparams.sh
#!/bin/bash
#這是個(gè)測(cè)試腳本傳N個(gè)參數(shù)的例子
echo "我的名字是 `basename $0` - 我是調(diào)用自 $0"
echo "我有 $# 參數(shù)"
count=1
while [ "$#" -ge "1" ];do
echo "參數(shù)序號(hào)為 $count 是 $1"
let count=count+1
shift
done
一個(gè)參數(shù)執(zhí)行
[root@svn shell_example]# sh manyparams.sh one
我的名字是 manyparams.sh - 我是調(diào)用自 manyparams.sh
我有 1 參數(shù)
參數(shù)序號(hào)為 1 是 one
5個(gè)參數(shù)執(zhí)行
代碼如下:
[root@svn shell_example]# sh manyparams.sh one two three four five
我的名字是 manyparams.sh - 我是調(diào)用自 manyparams.sh
我有 5 參數(shù)
參數(shù)序號(hào)為 1 是 one
參數(shù)序號(hào)為 2 是 two
參數(shù)序號(hào)為 3 是 three
參數(shù)序號(hào)為 4 是 four
參數(shù)序號(hào)為 5 是 five