Shell腳本傳參數(shù)方法總結(jié)

更新時(shí)間：2015年05月08日 09:29:20 投稿：junjie

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、接收固定長度的參數(shù)

[root@svn shell_example]# cat params.sh

#!/bin/bash

#傳參測試腳本

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

復(fù)制代碼代碼如下:

[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

復(fù)制代碼代碼如下:

[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.見紅字部分

復(fù)制代碼代碼如下:

[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

復(fù)制代碼代碼如下:

[root@svn shell_example]# cat params_v2.sh
#!/bin/bash
# 這是個(gè)測試腳本傳參的測試?yán)?/p>

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)行過程如下
不傳參數(shù)執(zhí)行

復(fù)制代碼代碼如下:

[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

復(fù)制代碼代碼如下:

[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

復(fù)制代碼代碼如下:

[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

問題來了,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

復(fù)制代碼代碼如下:

[root@svn shell_example]# cat manyparams.sh
#!/bin/bash
#這是個(gè)測試腳本傳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

復(fù)制代碼代碼如下:

[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

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