CSCI 372 homework 8

This assignment must be uploaded to the Moodle submission page for Homework 8.

The setup

On the computer there are three images of FAT file systems in the following regular files.

Your job is to use dd to make a copy of the first 512-byte sector, the BPB (BIOS Parameter Brock), of each of these images into your own directory. Then you are to use od or hexdump to print the following fields from the BPB in a readable fashion.

Except for the BS_FilSysType field, all of these positions are located in the same offset for both FAT16 and FAT32 file systems. However, they may differ in value.

What to turn in?

I am afraid that script is just unreadable. I’d prefer that you run emacs inside a shell buffer.

If that doesn’t work for you, see if you can get Perl script by dewtall to work. Everyone needs to see Perl at least once.

It is fine to work in groups, but you must type in your own dd and od commands. Be careful, these are old-style Unix commands. They have a very odd syntax.

Suggested reference materials

You will need to review Microsoft’s specification of the FAT file system. The PHOBOS tutorial of the FAT file system is also useful. It’s not hard to use dd to copy the first 512 bytes of a file. hexdump isn’t that bad, but the true hackers use od.