[PyHack] Lesson 2: Check if the MAC that the user has changed is correct

Continue lesson 1, after we have written the function to change the MAC address on the terminal. We need to check whether the current MAC is correct according to the MAC address specified by the user or not.

To do that, we must first get the result of the “ifconfig” command and assign it to a string variable. Then we will find the MAC in that data pile.

Get the result of the ifconfig . command

In the module subprocess there is a function called check_outputthis function checks your command and can assign that result to another variable.

It’s a bit bad, you guys can check it out and see where the MAC is located (hihi). We fix this problem by adding the command decode('utf-8')

After we have obtained the results of the ifconfig command successfully, we will find the MAC in this data pile.

Now we add the if statement to check if the interface’s MAC can be read or not.

When the program cannot read the MAC of the interface.

Compact code

We will put the code just now hàm get_current_mac()and return the result to the current_mac variable, then print it out. Since curret_mac is a Non-type, I just forced it to string.

Check MAC

After getting the current MAC address, we will compare it with the new MAC address specified by the user. To see if when changing the MAC, the current MAC address is the same as the MAC address the user entered. If they are the same, they will succeed; if they are different, they will fail.

And this is when you enter the wrong interface.

Remember the error of not changing the MAC when the first pair of numbers was odd? There was an error last time, but this time it’s gone.