I just implemented it. The ultimate filesystem which can answer the ultimate question of life, the universe and everything.

[ GitHub ]

How it works:

$ ./42fs /tmp/src /tmp/dst

$ ls -1 /tmp/dst
file

$ cat /tmp/src/file
Hello, world!

$ cat /tmp/dst/file
42

Great day indeed.

Check this wiki 42 article if didn’t catch the joke. :)