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一、接收固定长度的参数 复制代码 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 复制代码 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 复制代码 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 复制代码 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 复制代码 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 $0" if [ "$#" -eq "2" ];then 详细的执行过程如下 复制代码 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 复制代码 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 复制代码 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. 复制代码 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" count=1 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 5个参数执行 复制代码 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 |
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