$\frac{?}{{?}_{\frac{?}{?}}}$ Operating Systems Linux

READ THE ENTIRE INSTRUCTON BEFORE SUBMITING YOUR WORK IN THE SLATE DROPBOX

Description

Write a Borne Again shell $($BASH$)$ script which receives a path as the input and calculates the

number of each file type defined in Linux$/$Unix file types in the given path. Please review lecture

$5$ "File Structure and Processing" for different file type definitions. Name the script "filestatics".

Here are some sample runs of the "filestatics":

filestatics

You must enter a path:

Usage: filestatics pathname

filestatics foodir

foodir not found!

filestatics $/$dev $/$etc

You must enter a path:

Usage: filestatics pathname

filestatics $/$dev

Here is the $/$dev$$ directory file type statistics:

$$Ordinary$$Block$$character$$directory$$link$$pipe$$socket$$

$5101361000$

filestatics $/$etc

Here is the $/$etc$$ directory file type statistics:

$$Ordinary$$Block$$character$$directory$$link$$pipe$$socket$$

$150320715$

Note that the above numbers might be different in your machine.

Bonus

You will receive $2\%$ bonus mark, if you also print the statistics for permission bits as well. Here

is a sample output:

filestatics$/$dev

General requirements:

Include the following header in your script:

#$!/$bin$/$bash

# Assignment $2$

# Course:

# Family Name:

# Given Name:

# Student Number:

# Login name:

# Professor: Dr$.$ Nick Sajadi

Always check if the script has received the correct number of parameters and their orders

based on the shown examples. If the user enters wrong parameter print an error message

and notify the right usage format. In case of usage error or any other unusual error you

need to exit with none zero value.

The output of your script should be nicely formatted. Use the tab character to properly

format the output of your script.

If you create intermediate temporary files anywhere including in $/$ tmp$,$ remove them

before your script ends.

Make sure, you have had enough comments to make your script readable and

understandable.

If you have solved the bonus part, clearly mention both in scripts and in Slate as a

comment. If you miss one of them, you won't receive bonus marks.

IF YOUR SCRIPT HAS RUNTIME ERROR, YOU GET ZERO FOR THIS

ASSIGNMENT

IF YOU USE ANY COMMAND OR CONCEPT OTHER THAN COVERED IN

LECTURES, SUCH AS "awk", YOU WILL GET ZERO FOR THIS

ASSIGNMENT.