Bell-LaPadula file system (BLPfs)

We adopted Bell-LaPadula model into a filesystem, and we think this is super safe. Isn't it?

Usage

• print([arg]): prints argument(integer or string) to output.

> print("abcd\n")
abcd
> print(1)
1> 

• createfile([filename], [size], [level]): creates file with given filesize and file level.

> createfile("ABCD", 255, 1)

• write([filename], [buf], [pos]): writes buf into file from given position.

> write("ABCD", "print(\"hello world\")", 0)

• size([filename]): gets filesize

> print(size("ABCD"))
256>

• read([filename], [pos], [len]): reads file from given position.

> print(read("ABCD", 0, 6))
print(>

• execute([filename]): executes script file, and gets output of the script as return value

> print(execute("ABCD"))
hello world>

• remove([filename]): removes file

> remove("ABCD")