unix - How to search for extension in magic files

Question

I know you can find the extension with

file *.myext 

But I'm wondering if I can write into my magic file a line which for example return a success message on all the ".42" ex : myfile.42

imagine a folder with the following files

• test1.42
• test2.kk
• test3.42

what should be the content of my magic file in order to make a success only on test1.42 and test2.42

I tried that for the moment

>0xA2 string 42 success

Answer 1

linux/unix doesn't care about filename extensions, magic numbers represents first bytes of file which are used to determine type of file.