Application examples of shell programming functions

Write a script:

1, create a function, you can accept the Inode or block two parameters, if the user passed other parameters, then return error message 53 to the main program;

If the parameter passed is an inode, the usage of all the file system Inode nodes on the current system is displayed;

If the parameter passed is block, the use of all file system blocks on the current system is displayed;

2, call this function;

The code is as follows:

#!/bin/bash  
#Author: MOS  
#Script name:funDinfo.sh  
#Date & time:2012-10-09/21:44:16  
#Version: 1.0.1  
#Description:  
#  
#定义函数Disk_  
disk_ () {  
#case语句选择 case into
inode)  
    df-iph;;  #显示inode信息, the following is block block  
)  
    DF-PBH;  
*) return  
    #如果输入不符合, End Function, pass value  
Esac  
}  
#给出信息, read parameter  
read-p "Please input [Inode|block]:" Info  
#调用参数  
disk_ $Info  
#获取函数返回值, judging, if equal, output the following information  
[$-eq] && echo "Input error, error num ber is 53 "