| 标题 | Shell脚本传参数方法总结 |
| 内容 | 这篇文章主要介绍了Shell脚本传参数方法总结,本文着重讲解传递固定个数参数的方法、可变个数参数的方法两部份内容,需要的朋友可以参考下 一、接收固定长度的参数 代码如下: [root@svn shell_example]# cat params.sh #!/bin/bash #传参测试脚本 echo "My name is `basename $0` -I was called as $0" echo "My first parameter is : $1" echo "My second parameter is : $2" 空参数执行 代码如下: [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 : 传递2个参数执行 代码如下: [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、那如果还有参数怎么办呢?还要一个个加上来吗?答案是否定的 以下用法应该不陌生,就是直接执行脚本本身,没有附带任何参数,那么脚本讲抛出帮助信息.即怎么使用此脚本.见红字部分 代码如下: [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. 代码如下 代码如下: [root@svn shell_example]# cat params_v2.sh #!/bin/bash # 这是个测试脚本传参的测试例子 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 详细的执行过程如下 不传参数执行 代码如下: [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. 传递3个参数执行 代码如下: [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. 传递2个参数执行 代码如下: [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 问题来了,要是后期还要加参数怎么办呢?或者我也不确定到底会传几个参数. 解决方法如下,详细执行结果如下 代码如下: [root@svn shell_example]# cat manyparams.sh #!/bin/bash #这是个测试脚本传N个参数的例子 echo "我的名字是 `basename $0` - 我是调用自 $0" echo "我有 $# 参数" count=1 while [ "$#" -ge "1" ];do echo "参数序号为 $count 是 $1" let count=count+1 shift done 一个参数执行 [root@svn shell_example]# sh manyparams.sh one 我的名字是 manyparams.sh - 我是调用自 manyparams.sh 我有 1 参数 参数序号为 1 是 one 5个参数执行 代码如下: [root@svn shell_example]# sh manyparams.sh one two three four five 我的名字是 manyparams.sh - 我是调用自 manyparams.sh 我有 5 参数 参数序号为 1 是 one 参数序号为 2 是 two 参数序号为 3 是 three 参数序号为 4 是 four 参数序号为 5 是 five |
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