mastermind

Mastermind Character Device Module for System Programming Course

Getting Started

Compile the module

In order to compile the Mastermind module, first run the make file and wait until it finishes compiling.

$ make

Become root

Before continuing, it's better to become root.

$ sudo su

Insert the module

After compiling the module, insert the module into kernel.

$ insmod mastermind.ko mmind_number="4283"

Create a device node

Assuming major number is 239, create a device node:

$ mknod /dev/mastermind c 239 0

Testing the game

Now, we can test the game:

$ echo "1234" > /dev/mastermind
$ cat /dev/mastermind
1234 1+ 2- 0001
$ echo "4513" > /dev/mastermind
$ cat /dev/mastermind
1234 1+ 2- 0001
4531 1+ 1- 0002

Testing ioctl commands

In order to test ioctl commands, first compile test code.

$ gcc mmind_ioctl.c -o test

Then run the output file with arguments depending on the ioctl command to test. For MMIND_REMAINING command:

$ ./test 0

For MMIND_NEWGAME command, assuming new secret number is 1509:

$ ./test 1 1509

For MMIND_ENDGAME command:

$ ./test 2

Removing the module

$ rmmod mastermind
$ rm /dev/mastermind

alperkesen/mastermind